JP2009082154A - Heating element corrugated on both sides - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly safe heating element which does not change in flexibility throughout the period from before and during heat generation by the heating element to after completion of heat generation by the heating element, has an excellent warming/heating effect and, despite this, does not cause redness, diseases, etc., even when used for long. <P>SOLUTION: The heating element 1 has moldings of a heating composition which generates heat upon contact with oxygen. The plurality of moldings are disposed so as to be sandwiched between a base and a covering material, and are sealed including the periphery of the moldings to form separated heating parts 4 including the moldings and separating parts 6 comprising sealed parts. The heating element is characterized in that: it has four or more such separated heating parts; the separated heating part has a length of 5-300 mm, a width of 1-25 mm, excluding 25 mm, a height of 0.5-10 mm, excluding 10 mm, and a ratio of the length to the width of 2.0-60; the separating part has a width of 0.1-100 mm; and the heating element has the minimum bending resistance of 100 mm or less and a minimum-bending-resistance proportion of 60 or less. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention has irregularities on both sides, and is flexible before, during and after heating, that is, before, during and after use, and in particular, warms the human body that can be used repeatedly for a long time by directly contacting the skin. The present invention relates to a double-sided uneven heating element.

Conventionally, a heating element containing a heat-generating composition that contains metal powder such as iron powder, activated carbon, a reaction accelerator (inorganic electrolyte, etc.) and water as a main component and generates heat upon contact with oxygen in the air. Is widely used as a warmer. The general structure of these heating elements is a wet powder heating composition mixed with metal powder, activated carbon, a reaction accelerator (inorganic electrolyte, etc.), water, etc. that generates heat upon contact with oxygen in the air. However, it is housed in a breathable flat bag to form a heating element.
The heating element is used as a warming tool for the purpose of warming up against cold, etc., and as a thermal treatment tool for stiff shoulders, neuralgia, muscle pain, etc. Since it has an effect of relieving muscle pain and the like, it is widely used as a simple blood circulation promoting treatment tool.

For example, in Patent Document 1, as a heating element configured to be used by being attached to underwear, in order to facilitate the mounting of a heating bag, one side of a flat heating bag is given air permeability, A heat-generating bag is proposed that has a non-transferable adhesive layer (same meaning as the adhesive part) that is adhered to the entire surface or is appropriately patterned over the entire surface, and the surface having this adhesive layer is attached from above the underwear. ing.
Patent Document 2 also proposes a heat generating bag in which a pressure-sensitive adhesive layer is partially provided on the air permeable surface for the purpose of limiting the air flow rate of the air permeable packaging material and extending the heat generation duration.

Patent Document 3 discloses a pressure sensitive adhesive for the purpose of preventing the occurrence of itching and rash on the skin when it is directly applied to the skin as a direct-attached re-heating bag (hereinafter referred to as a direct-attached type) that is applied directly to the skin. It has also been proposed to make the layer area 30-70%.
Furthermore, as a heat-generating bag that improves heat transfer from the heat-generating bag to the body in the type heat-generating bag to be attached, the heat-generating bag is made lighter and thinner, and one side of the flat bag has air permeability and the other side An exothermic bag has also been developed in which an adhesive part is provided on the skin and the surface of the adhesive part is directly attached to the skin.
In addition, heat-generating bags have been developed in which a moisture-containing gel layer is attached to the skin instead of the adhesive part.

  Patent Document 4 discloses a sheet-like heating element that uses heat generated by an oxidation reaction between oxygen in the air and oxidizable metal powder. In this technique, a composition obtained by mixing a fibrous substance in iron powder, activated carbon, an electrolyte and water is formed into a sheet shape by papermaking, and the mounting property and the like are improved.

  By the way, there is a form in which the heating element is accommodated in a breathable container and pressed against or attached to a part of the body. This matured body is made of iron powder as the exothermic reaction proceeds. Becomes a lump and loses flexibility. Therefore, when used for a long time, the entire heating element becomes gradually harder and uncomfortable.

The conventional heating element has the following problems.
That is, the heating element of the pasting type is 1. There was a problem that flexibility and adhesion were insufficient and heat could not be efficiently transferred to the body. In addition, in order to obtain a desired warmth and a desired duration, a large amount of the exothermic composition is required. As a result, the heating element becomes heavy and bulky. There was also the inconvenience that the wearing state was easy to see from the outside.
2. Since the air permeability changes depending on the degree of adhesion between the body and the heat-generating bag due to a change in body posture during wearing, there is a drawback that a constant temperature such as being too warm or too hot cannot be obtained.

Japanese Utility Model Publication No. 56-34735 Japanese Utility Model Publication No. 3-96816 JP-A-9-557 Japanese Patent No. 2572612

  From the above, the problem of the present invention is that the flexibility of the heating element does not change before the heating of the heating element and after the heating of the heating element is finished, while having an excellent heating effect. The purpose is to provide a highly safe heating element that does not cause redness, medical treatment, etc. even if it is used for a long time. In other words, it is possible to provide a heating element that can maintain stable heat generation characteristics and can be expected in various applications.

As a result of intensive studies to solve these problems, the present inventors have reached the present invention.
That is, the double-sided uneven heating element of the present invention is a heating element comprising a heating composition molded body that generates heat in contact with oxygen as described in claim 1, and a plurality of the molded bodies are arranged, By sandwiching between the base material and the covering material and sealing the periphery of the molded body, a divided heat generating portion including the molded body and a partitioned portion including a seal portion are formed. Has 4 or more of the section heat generating portions, the section heat generating section has a length of 5 mm to 300 mm, a width of 1 mm to less than 25 mm, a height of 0.1 mm to less than 10 mm, and the length relative to the width The thickness is 2.0 or more and 60 or less, the width of the section is 0.1 mm or more and 100 mm or less, the minimum bending resistance of the heating element is 100 mm or less, and the minimum bending resistance ratio is 60 or less. Features.
Moreover, the present invention according to claim 2 is the double-sided uneven heating element according to claim 1, wherein the molded body is a mixture containing iron powder, a carbon component, a reaction accelerator and water as essential components. The water content in the mixture is 0.01 to 13.5, the molding degree is 5 or more, and the moisture in the mixture does not function as an air barrier layer, and is left in air in a 20 ° C. environment without wind immediately after production. A surplus water exothermic composition that causes an exothermic reaction with a temperature rise of 5 ° C. or more within 5 minutes is molded into a strip shape.
Moreover, the present invention described in claim 3 is the double-sided uneven heating element according to claim 1 or 2, wherein the heating composition molded body is any one of a heating sheet with holes, a heating sheet piece with holes, and a heating piece. It is characterized by.
According to a fourth aspect of the present invention, in the double-sided uneven heating element according to any one of the first to third aspects, a notch is formed between the adjacent divided heat generating portions.
The invention according to claim 5 is the double-sided uneven heating element according to claim 4, wherein a notch is provided at an end of the cut.
According to a sixth aspect of the present invention, in the double-sided uneven heating element according to any one of the first to fifth aspects, a change in minimum bending resistance before and after the heat generation of the heating element is 30. % Or less.
Further, the present invention according to claim 7 is the double-sided uneven heating element according to any one of claims 1 to 6, in a region other than the section heating section along the longitudinal direction of the section heating section, It is characterized by arranging the cuts alternately.
The invention according to claim 8 is the double-sided uneven heating element according to any one of claims 1 to 7, characterized in that a fixing means is provided at an exposed portion of the double-sided uneven heating element. To do.
The present invention according to claim 9 is the double-sided uneven heating element according to claim 8, wherein the fixing means is an adhesive layer.
The invention according to claim 10 is the double-sided uneven heating element according to claim 9, wherein the pressure-sensitive adhesive layer includes a region extending in the longitudinal direction from the section, and the longitudinal direction of the heating element. It is characterized by being provided at both ends.
The present invention according to claim 11 is the double-sided uneven heating element according to claim 9, wherein the pressure-sensitive adhesive layer includes a region extending in a longitudinal direction from a top region of each of the divided heat generating portions, and It is provided at both ends in the longitudinal direction of the heat generating element, and a ventilation surface is provided from a side surface portion of the section heat generating portion.

Below, the preferable aspect of this invention is demonstrated.
The double-sided uneven heating element according to the present invention has a heat generating composition molded body obtained by molding a moldable surplus water heat generating composition that generates heat in contact with oxygen by a mold forming method. It is a double-sided uneven heating element having exothermic parts provided at intervals with an interval, and is a mixture containing iron powder, a carbon component, a reaction accelerator and water as essential components, The water value is 0.01 to 13.5, the degree of molding is 5 or more, the moisture in the exothermic composition does not function as an air barrier layer, and immediately after production, it is not stored in a breathable storage bag. An exothermic composition molded body obtained by molding a moldable surplus water exothermic composition that causes an exothermic reaction with a temperature increase of 5 ° C. or more within 5 minutes after being left in air in an environment of 20 ° C. Laminated on the base material and further coated with a coating material, the peripheral edge of the exothermic composition molded body The heat-sealing of the base material and the covering material, and having four or more divided heat generating portions that are integrally formed heat generating areas having an A surface that is one surface and a B surface that is the other surface, The length of the heat generating part is 5 mm to 300 mm, the width is 1 mm to less than 25 mm, the height is 0.1 mm to 10 mm, the ratio of (length / width) is 2.0 to 60, and the width of the section part 0.1 to 100 mm, the four or more divided heat generating portions are separated from each other, formed in stripes in at least one direction, and at least one of the base material and the covering material is air permeable ( (Oxygen permeability), the A surface is air permeable, and both sides of the A and B are uneven surfaces having a height formed by a convex segment heat generating part and a concave (flat) segment part. And the heating element has a minimum bending resistance of 100 mm or less, and The ratio of small bending resistance is 60 or less, it does not bend easily except in the direction with the minimum bending resistance, and there is a direction for ease of bending, and only one direction is extremely easy to bend compared to other directions. It is preferable.
The double-sided uneven heating element of the present invention is a heating part provided at intervals, with the segmented heating part having a heating composition molded body that generates heat in contact with air (oxygen) as a seal part. 4 or more of the exothermic composition molded body composed of a sheet-like heating piece comprising iron powder, a carbon component, a reaction accelerator and water as essential components, And then covering the substrate with a covering material, and heat-sealing the base material and the covering material at the peripheral edge of the exothermic composition molded body. 4 or more divided heat generating portions that are integrally formed heat generating regions having the B surface, and the length of the divided heat generating portions is 5 mm to 300 mm, the width is 1 mm to less than 25 mm, and the height is 0 0.5 mm to 10 mm, and the ratio of (length / width) is 2.0 to 60 And the width of the section is 0.1 to 100 mm, the two or more section heat generating sections are separated from each other, and are formed in stripes in at least one direction, and at least of the base material and the covering material One type has air permeability (oxygen permeability), the A surface has air permeability, and both sides of the A and B are formed by a convex segment heating part and a concave (flat) segment part. The heating element has a minimum bending resistance of 100 mm or less, and a minimum bending resistance ratio of 60 or less, and is not easily bent except in the direction having the minimum bending resistance, and is bent. It is preferable to have a structure in which the direction is low and only one direction is extremely easy to bend compared to other directions.
The double-sided uneven heating element of the present invention is a heating part provided at intervals, with the segmented heating part having a heating composition molded body that generates heat in contact with air (oxygen) as a seal part. A heat-generating composition comprising a sheet-like heating piece with holes having one stripe-shaped space portion, which is an essential component of iron powder, a carbon component, a reaction accelerator, and water. Two or more of the molded bodies were laminated on the base material at intervals, and further coated with a coating material, and the base material and the coating material at the peripheral edge of the exothermic composition molded body were heat sealed. And having four or more divided heat generating portions that are integrally formed heat generating regions having an A surface that is one surface and a B surface that is the other surface, and one of the divided heat generating portions is one With the space portion of the hole-like sheet-shaped heating piece having the stripe-shaped space portion interposed, This is a portion of the side, the length of the segmented heat generating part is 5 mm to 300 mm, the width is 1 mm or more to less than 25 mm, the height is 0.5 mm to 10 mm, and the ratio of (length / width) is 2.0 to 60, and the width of the section that is the space portion is 0.1 to 100 mm, and the two or more section heating portions are separated from each other by the space between the space portion and the sheet-like heating piece with holes. , At least one of the base material and the covering material is air permeable (oxygen permeable), the A surface is air permeable, Both surfaces are uneven surfaces having a height formed by a convex segmented heating part and a concave (flat) segmented part, the minimum bending resistance of the heating element is 100 mm or less, and the minimum bending resistance ratio Is less than 60 and can be easily bent except in the direction having the minimum low bending resistance. Not, there is orientation to inexpensiveness bending, it is preferred that only one direction than in the other direction has a structure easy to bend extremely.
The double-sided uneven heating element of the present invention is a heating part provided at intervals, with the segmented heating part having a heating composition molded body that generates heat in contact with air (oxygen) as a seal part. A double-sided uneven heating element having an iron powder, a carbon component, a reaction accelerator and water as essential components, and a heat-generating sheet with holes having a plurality of three or more stripe-shaped spaces spaced apart from each other The exothermic composition molded body is laminated on a base material and further coated with a coating material, and the base material and the coating material at the peripheral edge of the exothermic composition molded body are heat-sealed. The length of the divided heat generating portion having four or more divided heat generating portions which are integrally formed heat generating regions having the A surface and the B surface which is the other surface, and the region between the space portions. 5mm to 300mm, width 1mm to less than 25mm, height 0 5 mm to 10 mm, the ratio of (length / width) is 2.0 to 60, the width of the space is 0.1 to 100 mm, and the four or more divided heat generating portions are separated from each other. , At least one of the base material and the covering material is air permeable (oxygen permeable), the A surface is air permeable, Both surfaces are uneven surfaces having a height formed by a convex section heating portion and a concave (flat) section, the minimum low bending resistance of the heating element is 100 mm or less, and the minimum bending resistance ratio It is preferable that the ratio is 60 or less, and it is not easily bent except in the direction having the minimum bending resistance, has a direction in the bending ease, and has a structure in which only one direction is extremely easily bent compared to the other direction. .
Further, in the double-sided uneven heating element, the heat-generating sheet piece with holes and the stripe-shaped space portion of the heat-generating sheet with holes have a notch at least at one end portion on the extension line in the longitudinal direction of the stripe-shaped space portion. It is preferable.
The double-sided uneven heating element of the present invention has an exothermic composition containing iron powder, a carbon component, a reaction accelerator and water as essential components, and at least three stripe-shaped spaces are spaced apart. The exothermic composition formed body comprising a heat generating sheet with holes having a base material and a covering material are stored in a storage body in which three sides are sheet-sealed, and the remaining one side is heat-sealed and bonded to the base. At least one of the material and the covering material has air permeability (oxygen permeability), has a direction for ease of bending, and has a structure in which only one direction is extremely easy to bend compared to the other direction, and a heat generating composition It is preferable that it is a double-sided uneven | corrugated exothermic composition molded object which has the uneven | corrugated surface which has the height which consists of a molded object having a space part.
Further, the double-sided uneven heating element was selected from a dispersion-type heating sheet in which the heating sheet spreads and holds the heating composition on a nonwoven fabric, and a paper-making heating sheet produced by the paper-making method. Preferably it is a seed.
Moreover, it is preferable that the double-sided uneven heating element has a fixing means in at least one part of the exposed part of the double-sided uneven heating element.
In the double-sided uneven heating element, the fixing means is preferably an adhesive layer.
Further, the double-sided uneven heating element is a means for the fixing means to fix the double-sided uneven heating element to an inner part of the user's clothes, and the B side of the heating element is the user's body. It is preferable that it is located on the A surface of the above-mentioned divided heat generating part so as to be placed directly.
In the double-sided uneven heating element, the pressure-sensitive adhesive layer has each section on one side of the double-sided uneven heating element, and extends to both ends of the heating element, and the area to the both ends and at least the length of the heating element. It is preferable to be provided at both ends in the direction.
In the double-sided uneven heating element, the pressure-sensitive adhesive layer has a top region of each divided heating part on one side of the double-sided uneven heating element and the region extending to both ends of the heating element. It is preferable that ventilation is performed mainly from the side surface portions of the divided heat generating portions provided at both ends in the longitudinal direction of the body.
The double-sided uneven heating element is provided as a mesh-like breathable adhesive layer in which the pressure-sensitive adhesive layer is provided on one side of the double-sided uneven heating element by a nozzle injection method such as a melt blow method or a curtain coat method. It is preferable.
In the double-sided uneven heating element, it is preferable that at least one of the packaging material and the pressure-sensitive adhesive layer of the double-sided uneven heating element contains a functional substance.
Moreover, as for a double-sided uneven | corrugated shaped heating element, it is preferable that the packaging material on the side facing the body is a water-absorbing packaging material.
Moreover, it is preferable that the absolute value of the change of the value after use with respect to the value before use of the said minimum rigidity of a double-sided uneven | corrugated shaped heating element is 30% or less.
In addition, the double-sided uneven heating element has an outer shape of the double-sided uneven heating element that has a flat shape, an eye mask shape, a bowl shape, a bowl shape, a rounded rectangular shape, a rectangular shape, a rounded square shape, a square shape, or an egg shape. It is preferably one of a shape, a boomerang shape, a ball shape, a star shape, a wing shape, a nose shape, a lantern shape, and a foot shape, and both surfaces are preferably uneven.
Moreover, it is preferable that the double-sided uneven heating element is enclosed in a state in which the heating element can be taken out in a non-breathable storage bag.
The double-sided uneven heating element is enclosed in a state in which the heating element is folded into two with the ventilation surface inside and can be taken out into a non-breathable storage bag. The double-sided uneven heating element as described.
The method of using the double-sided uneven heating element according to the present invention is a striped pattern with intervals between the divided heat generating parts having heat generating composition molded bodies that generate heat upon contact with air (oxygen) as seal parts. A heating method for holding a double-sided uneven heating element having a heating part provided between the underwear and the skin to warm the human body, wherein one side (breathable adhesive face) of the heating bag has air permeability and is adhesive. The other side (non-adhesive surface) has a structure that does not have an adhesive part. The breathable adhesive surface of the heat-generating bag is attached to the inside of the underwear, and the uneven surface that is the non-adhesive surface is in contact with the skin. It is preferable to use them.
The heating element preferably has a change in minimum bending resistance before and after the heating element is 30% or less.
Moreover, as for the manufacturing method of a heat generating body, it is preferable that the said cut is a staggered cut.

1. The double-sided uneven heating element of the present invention is not easily bent except in the direction having the minimum bending resistance, and has a direction for bending ease, and the bending resistance in the direction almost perpendicular to the minimum bending resistance is the maximum bending resistance. It has a degree of flexibility and has a structure that is easily bent in only one direction compared to other directions, so it is easy to handle and there is no change in the minimum bending resistance before, during and after heat generation, and flexibility is always maintained. Because it can, you can get a sufficient thermal effect while still fitting to the body.
2. The double-sided uneven heating element of the present invention can maintain sufficient flexibility at all times even after it is first used, and since the concave part of the dividing part and the convex part of the dividing heat part are provided in a stripe shape, the heating element Both sides of the strip become uneven stripes that can be used along the body part, exhibiting sufficient thermal effect and suppressing heat accumulation, resulting in redness, colic, swelling, rash, etc. even after repeated use for a long time It has become possible to obtain an excellent effect as a highly safe thermal apparatus that is extremely difficult to cause.
3. The double-sided uneven heating element of the present invention can warm the human body by directly contacting the skin without sticking the double-sided uneven heating element to the skin. The coldness immediately after pasting the double-sided uneven heating element, the occurrence of itching or rash on the pasted part, the pain when peeling the double-sided uneven heating element, and the double-sided unevenness when sweating All problems such as falling off of the heating element and uncomfortable feeling due to sweat being not absorbed were all solved. In addition, stable heat generation characteristics can be maintained regardless of changes in body posture during use. Furthermore, since the heat of the double-sided uneven heating element can be efficiently transmitted to the skin, the double-sided uneven heating element can be made light and thin, and a desired duration can be obtained without a sense of incongruity at the time of wearing. I can do it now. For this reason, in addition to a double-sided uneven heating element that takes heat to overcome the cold, it can also be used as a medical device for the purpose of preventing poor physical condition due to cooling in summer, relieving menstrual pain, neuralgia, muscle pain, etc., and recovering from fatigue An excellent effect can be obtained.

At least a part of the exposed portion of the double-sided uneven heating element of the present invention is provided with a detachable attachment means, but when the detachable attachment means is an adhesive layer,
1) The pressure-sensitive adhesive layer of the heating element is provided on the air-permeable surface side of the heating element, and the pressure-sensitive adhesive layer is mainly (1) a type provided in the section heating section, (2) a type provided in the section section, (3) a heating element of a type that directly contacts the skin of any of the types provided in the section heating section and the section;
2) The heating element has a pressure-sensitive adhesive layer on the non-breathable surface side of the heating element, and the pressure-sensitive adhesive layer is mainly (4) a type that is provided in the section heating section, and (5) a type that is provided in the section. (6) There is a type of heating element that directly contacts the skin of any of the types provided in the section heating section and the section section. The fixing means is preferably removable.

The pressure-sensitive adhesive of the present invention is a pressure-sensitive adhesive.
A functional substance can also be included in the packaging material or pressure-sensitive adhesive layer on the side of the double-sided uneven heating element of the present invention that touches the body.

  The segmented heat generating portion of the present invention “striped” means that a plurality of segmented heat generating portions are provided in a streak-like (elongated and continuous shape) at intervals (parallel lines, parallel curves, etc.) It is. One streak is preferably composed of one section heat generating portion. In this case, the section heating section and the section section may be linear or curved.

Moreover, as long as the following conditions are satisfied, one streak may be composed of two or more divided heat generating portions and one or more divided portions.
T is T ≧ 2 × S, and preferably T ≧ 2.5 × S.
P is P ≦ T, and preferably P ≦ 0.5 × T.
T: Length of one section heat generating part S: Width of one section heat generating part P: Length of section heating part

  As an example, it is possible to arrange streaks composed of segmented heat generating portions in parallel stripes (vertical stripes, horizontal stripes, diagonal stripes, vertical wave stripes, horizontal wave stripes, diagonal wave stripes, etc.).

  The minimum bending resistance of the double-sided uneven heating element of the present invention is usually 100 mm or less, preferably 1 to 100 mm, more preferably 1 to 80 mm, still more preferably 1 to 50 mm, and still more preferably. It is 5-50 mm, More preferably, it is 5-40 mm, More preferably, it is 5-30 mm, More preferably, it is 5-20 mm.

  The minimum bending resistance of the double-sided uneven heating element of the present invention is 60 or less, preferably 1 to 60, more preferably 1 to 50, still more preferably 1 to 40, still more preferably. It is 1-30, More preferably, it is 1-20, More preferably, it is 1-10.

  The minimum bending resistance ratio of the double-sided uneven heating element of the present invention is 60 or less, preferably 1 to 60, and more preferably 2 to 60.

  The change in the minimum bending resistance before and after the heat generation of the double-sided uneven heating element of the present invention, that is, the absolute value change after the end of the heat generation with respect to the value before the heat generation of the minimum bending resistance of the double-sided uneven heating element of the present invention The value is 30% or less, preferably 0 to 30%, more preferably 0 to 20%, still more preferably 0 to 10%, still more preferably 0 to 5%, still more preferably. Is 0%.

In the double-sided uneven heating element of the present invention, various sizes can be adopted as the size of the divided heat generating portion and the divided portion, and the length and width can be adopted as long, short, wide and narrow sizes, which can be combined, and various stripes Can be used.
A perforation that can be cut by hand may be provided at the section of the double-sided uneven heating element of the present invention, and when used, this double-sided uneven heating element heating element may be divided into several parts.

The preferred size of the segmented heat generating part or the exothermic composition molded body is as follows.
1) In the case of a circular shape, a disc shape, and a disc-like shape The diameter is preferably about 5 mm to about 60 mm, more preferably 5 mm to 50 mm, still more preferably 10 mm to 40 mm, still more preferably 20 mm to 30 mm It is.
The height is preferably 1 mm or more and less than 24 mm, more preferably 1 mm to 20 mm, still more preferably 1.5 mm to 10 mm, still more preferably 3 mm to 9 mm, still more preferably 4 mm to 8 mm, More preferably, it is 5 mm-7 mm.
2) When the shape is other than 1) (rectangular shape, rectangular-like shape, etc.) The width is preferably 1 mm to less than 25 mm, more preferably 5 mm to 20 mm, further preferably 5 mm to 15 mm, Preferably, it is 5 mm to 10 mm.
Further, the height is preferably 0.1 mm to 10 mm, more preferably 0.5 mm to 10 mm, still more preferably 1 mm to 10 mm, and further preferably 2 mm to 10 mm.
Further, the length is preferably 5 mm to 300 mm, more preferably 5 mm to 200 mm, more preferably 5 mm to 100 mm, still more preferably 20 mm to 150 mm, and further preferably 30 mm to 100 mm.
Further, the surface area is not limited as long as it has a function as a segmented heat generating portion, but is preferably about 50 cm ² or less, more preferably about 40 cm ² or less, still more preferably less than about 25 cm ² , still more preferably. Is less than 20 cm ² .

  When the exothermic composition molded body is accommodated in the segmented exothermic part, which is the storage area of the exothermic composition molded body, the volumetric product of the exothermic composition molded body and the exothermic area occupied by the exothermic composition molded body. The volume ratio with the volume of the divided heat generating portion that is the composition storage region is usually 0.6 to 1, preferably 0.7 to 1, more preferably 0.8 to 1, and still more preferably 0. .9-1.

  The width of the section is not limited as long as the section heat generating section can be provided at intervals, but is preferably 0.1 mm to 50 mm, preferably 0.3 mm to 50 mm, more preferably 0. 0.3 mm to 50 mm, more preferably 0.3 mm to 40 mm, still more preferably 0.5 mm to 30 mm, still more preferably 1 mm to 20 mm, and still more preferably 3 mm to 10 mm.

Here, the total area of the divided heat generating portions is not limited, but preferably, the total area of the divided heat generating portions is 50 to 85% with respect to the entire surface of the heat generating surface of the heating element, and more preferably 50 to 85%. 70%.
In such a range, heat storage is suppressed and redness, medical treatment, etc. can be more effectively prevented.
The shape of the segment heat generating portion includes a continuous stripe shape as shown in FIG. 1 and a discontinuous stripe shape as shown in FIGS.

  In order to have a number of partial acupoint stimulating elements and to expect a comfortable thermotherapy, the width of the section is preferably 3.5 to 10 mm, and the width of the section heating section and the section (air) The width ratio of the layer portion is preferably 1: 1 to 3: 1.

  In particular, in the case of a double-sided uneven heating element provided with a pressure-sensitive adhesive layer on the section heating section, the ratio of the width of the section heating section and the section section (air layer section) is not limited, but is in the range of 1: 1 to 3: 1. It is preferable that A thermal effect similar to that in the case of the entire single heat generating portion can be obtained, and the wearability is sufficient, and redness and the like can be more effectively prevented. That is, as a result of practically securing the adhesive force / thermal effect, suppressing heat accumulation, further improving the effect of preventing redness and the like, and suppressing the retention of sweat, it is possible to more effectively prevent stuffiness and peeling of the sheet.

Note that the double-sided uneven heating element of the present invention does not have to have the same size for all the divided heat generating portions and the intervals (the divided portions), and can have various shapes and arrangements depending on the application.
You may form a division | segmentation heat_generation | fever part by roughening the density of the center part rather than the outer peripheral part of a sheet | seat surface.

  In the present invention, the exothermic composition part molded body means both the exothermic composition part molded body and the exothermic composition compressed body which is a compressed exothermic composition molded body.

  Since the segmented heat generating part having the exothermic composition molded body and the segmented part that does not have the exothermic composition molded body and is the sealing part of the packaging material that is the base material and the covering material are alternately and linearly repeated, in the bending direction The section is oriented, and the section is bent as a hinge between the section heat generating sections which are in the continuum and the rigidity is less likely to bend while preferentially bending over the section heat generating sections. With this configuration, it is possible to set the direction for ease of bending, improve handling, dramatically improve the fit to the human body with a two-dimensional curved surface, and greatly reduce the distortion of the heating element due to heat generation. Before the heat generation, during the heat generation, and after the heat generation ends, the flexibility (minimum bending resistance) of the heating element is basically the same,

The outer shape of the double-sided uneven heating element of the present invention is not limited, but FIG. 12 shows an example (except for the shape of the sectional heating part in the figure). (A) is a flat shape and (b) is an eye shape. (C) (r) (s) is a saddle shape, (d) is a saddle shape, (e) is a rounded rectangular shape, (f) is a rectangular shape, (g) is a rounded square shape, and (h) is a round shape. Square, (i) oval, (j) boomerang, (k) starball, (l) star, (m) (n) wing, (o) nose, ( p) (q) is a lantern, and (t) (u) is a foot. The airfoil is suitable around the neck and shoulders.
Perforations (perforated cuts), staggered cuts, perforations with V-notches (perforated cuts with V-notches), staggered with V-notches in at least a part of the region other than the section-shaped heat-generating portion of the heating element. A heating element provided with a through notch such as a notch is also included in the planar shape of the heating element of the present invention.
In addition, the shape of the heating element described in the present specification includes those obtained by modifying the described shape based on the basic shape.
In the present invention, a region corresponding to a corner (an end corner) such as an exothermic composition molded body, a heat generating portion, a section heat generating portion, a heat generating body, a seal portion, a through hole, a concave portion, or a convex portion is substantially arc-shaped (R). May be provided.
Although there is no restriction | limiting in the curvature radius as this substantially circular arc shape (R shape) shape, Preferably it is 0.1-20.0 mm, More preferably, it is 0.3-10.0 mm, More preferably It is 0.1-5.0 mm, More preferably, it is 0.3-5.0 mm, More preferably, it is 0.3-3.0 mm, More preferably, it is 0.5-2.0 mm.

  In the double-sided uneven heating element of the present invention, by forming the segmented heat generating part in a stripe shape with the segmented heat generating part including the exothermic composition molded body and the segmented part which is a seal part not including the heat generating composition as an interval, Although details about the effect of suppressing redness and numbness are unclear, the present inventor estimates as follows.

  The purpose of hyperthermia treatment is to promote blood circulation and relieve stiff shoulders and muscle pain by supplying heat to the affected area and warming it. However, if a heating element formed by a single conventional heating part is left on the affected part for a long time, heat storage occurs, and when the skin surface temperature exceeds a certain critical temperature (about 42 to 43 ° C.), blood is conversely It becomes difficult to flow, the cooling action by the blood flow is reduced, and the heat storage is further increased, resulting in redness and medical treatment.

  In addition, since the temperature of the double-sided uneven heating element varies to some extent, when the temperature condition is set to be suitable for the thermal treatment, the skin temperature may exceed the critical temperature when the temperature of the double-sided uneven heating element rises. As described above, it is considered that blood flow decreases, heat storage further proceeds, and redness and the like become more prominent.

  Therefore, the double-sided uneven heating element of the present invention forms the heat generating part in a stripe shape using the segmented heat generating part, so that the heat supply from the heat generating part is less than the part with the large heat supply (the segmented heat generating part). Separated into portions (dividing portions), the dividing portions serve as air passages that allow the air layer portion to communicate with the outside. For this reason, surplus heat that causes heat storage is dissipated to the outside through this air passage, so that heat storage can be suppressed in the surface of the double-sided uneven heating element, and heat generation, medical treatment, and the like can be prevented. And it is thought that surplus heat is effectively released by providing this air passage.

  That is, with the configuration of the present invention, heat storage that causes redness and the like due to a combination of the cooling effect due to blood flow and the absorption and vaporization of sweat and the release of vapor is prevented, and further, temperature fluctuations of the exothermic agent occur. However, it is considered that the fluctuation can be sufficiently absorbed and the heat storage can be suppressed, and as a result, redness or the like hardly occurs. On the other hand, since the skin surface of the segmented heat generating portion is maintained at a temperature sufficient for producing a heat effect, it is considered that the same heat effect as that when the heat generating portion is formed on the entire surface can be obtained as a whole. .

The double-sided uneven heating element of the present invention will be described below with reference to FIGS.
FIG. 1 is a plan view showing an example of a double-sided uneven heating element 1 according to the present invention, in which a stripe-like heating composition molded body 3 formed with a moldable excess water heating composition is formed by a base material 15 and a covering material 14. It is the double-sided uneven | corrugated flexible heat generating body 1 which has the stripe-shaped 8 division | segmentation heat generating part 4 pinched | interposed and enclosed between. A section 6 exists between the section heat generating section 4 and the section heat generating section 4 as an interval, and an extension region in the longitudinal direction of the section section 6 is a section section extension section 5.
The length of the segment heating part 4 is 5 mm or more and 300 mm or less, the width is 1 mm or more and less than 25 mm, the height is 0.5 mm or more and less than 10 mm, and the length relative to the width is 2.0 or more and 60 or less. The width of the part was 0.1 mm or more and 100 mm or less, the minimum bending resistance of the heating element was 100 mm or less, and the minimum bending resistance ratio was 60 or less.
Specifically, the exothermic composition molded body 3 is sandwiched between a covering material 14 made of a breathable film which is a laminate of a nonwoven fabric and a porous film, and a base material 15 made of a non-breathable film which is a polyethylene film with an adhesive layer. The periphery of the two films is heat-sealed, and the pressure-sensitive adhesive layer 10 is provided as a fixing means on the non-breathable film of the base material 15.
It is preferable that S is a stripe direction of the divided heat generating portion, L is a direction orthogonal to the stripe direction of the divided heat generating portion, and L is a longitudinal direction of the double-sided uneven heating element 1.

FIG. 2A is an explanatory sectional view for explaining the flexibility of the double-sided uneven heating element of the present invention using the double-sided uneven heating element of FIG.
FIG. 2A shows that the uneven heating element 1 is placed on the support base 18 with the pressure-sensitive adhesive layer 10 facing up, and gently pushed toward the end of the support base. The distance that protruded from the end of the support 10 of the double-sided uneven heating element 1 when the tip of the double-sided uneven heating element 1 was attached to the wall was observed.
In the double-sided uneven heating element 1, the portion protruding from the end portion of the support base 10 hangs downward along the wall of the end portion of the support base 10, but the heat generation portion in FIG. A single commercially available body warmer remained straight even when almost the entire heating element was extended to the end of the support base.
FIG.2 (c) is a top view of the conventional heat generating body which has the heat generating part 19 which consists of one continuous body.
Thereby, it turns out that the flexibility of the double-sided uneven | corrugated shaped heating element 1 of this invention is excellent.

3A to 3O are a plan view and a cross-sectional view showing the exothermic composition molded body laminated on the base material. What has a structure which coat | covered these with the coating | covering material and heat-sealed the peripheral part of the heat generating composition molded object 3 and the peripheral part of the heat generating body is a double-sided uneven | corrugated heating element. The space may be heat sealed as desired.
FIG. 3A is a plan view showing an example in which the exothermic composition molded body 3 obtained by molding the moldable excess water exothermic composition on the base material 15 is laminated. FIG. 3B is a sectional view of the same.
FIG. 3C is a plan view showing an example in which the exothermic composition molded body 20 made of sheet-like exothermic pieces is laminated on the base material 15. FIG. 3D is a sectional view of the same.
FIG. 3E is a cross-sectional view showing another example in which the exothermic composition molded body 20 made of a sheet-like exothermic piece is laminated on the base material 15 via a fixing layer 24 made of an adhesive.
FIG. 3F is a plan view showing an example in which a heat generating composition molded body 21 made of a heat generating sheet with holes is laminated on the base material 15. FIG. 3G is a cross-sectional view taken along the line V-V. FIG. 3H is a cross-sectional view showing another example in which a heat generating composition molded body 21 made of a heat generating sheet with holes is laminated on a base material 15 via a fixing layer 24 made of an adhesive.
FIG. 3 (i) shows a notched heat generating sheet with notches provided on the base material 15 with notches 25 at both ends in the short direction (stripe direction), which is the extension direction of the holes of the heat generating sheet 26 with holes. It is a top view which shows an example which laminated | stacked the heat generating composition molded object. FIG. 3J is a UU sectional view.
FIG. 3 (k) is composed of a heat generating sheet with holes with notches provided on both ends in the short direction (stripe direction), which is an extension direction of the holes of the heat generating sheet 23 with holes, on the base material 15. It is sectional drawing which shows another example which laminated | stacked the heat generating composition molded object 21 through the fixing layer 24 which consists of adhesives.
FIG. 3L is a plan view showing an example in which the exothermic composition molded body 22 made of a sheet-like exothermic piece with holes is laminated on the base material 15. FIG. 3M is a cross-sectional view taken along the line TT.
FIG. 3 (n) shows a sheet-like heat generation with a hole with a notch portion in which notch portions 25 are provided at both ends in the short direction (stripe direction) which is an extension direction of the hole of the sheet-like heat generation piece with a hole on the base material 15. It is a top view which shows an example which laminated | stacked the exothermic composition molded object 22 which consists of a piece. FIG. 3O is a sectional view taken along the line SS.
In addition, as for the exothermic composition molded object 21 which consists of the said exothermic sheet with a hole with a notch part, and the exothermic composition molded object 22 which consists of a sheet-like exothermic piece with a hole with a notch part, all are Fig.3 (a)-(e). The exothermic composition molded body was prepared so that both end portions in the longitudinal direction of the section heat generating section 3 and the section heat generating section 20 shown in FIG. Is.

Here, a heating element of a type in which a pressure-sensitive adhesive layer is provided on the breathable surface will be described.
FIG. 4A is a plan view of the breathable surface side showing another example of the double-sided uneven heating element 1 of the present invention, and a striped heating composition in which the moldable excess water heating composition 2 is molded. The double-sided concavo-convex flexible heating element 1 has eight strip-like divided heating portions 4 in which the molded body 3 is sandwiched and enclosed between the base material 15 and the covering material 14.
The double-sided uneven heating element 1 of the present example has an adhesive layer in stripes on both ends in the longitudinal direction on the side of the breathable coating material 14, each segmented portion, segmented portion extension, side surface portion of the segmented heat generation, and part of the upper portion. 10 is provided. It is a double-sided uneven heating element having a minimum bending resistance ratio of 50 or less. FIG. 4B is a cross-sectional view taken along the line R-R in which the separator 17 is attached to the pressure-sensitive adhesive layer 10 of the heating element 1 shown in FIG.
FIG. 4C is a plan view of the breathable surface side showing another example of the double-sided uneven heating element 1 of the present invention, and the double-sided uneven heating element 1 of FIG. 4A except for the adhesive layer. Is the same.
In the double-sided uneven heating element 1 of this example, a mesh-like breathable pressure-sensitive adhesive layer 11 formed by a melt blow method on a breathable coating material 14 is provided on the entire breathable surface side. It is a double-sided uneven heating element having a minimum bending resistance ratio of 50 or less. FIG. 4D is a cross-sectional view taken along the line Q-Q in which a separator 17 is attached to that shown in FIG.

4 (a) and 4 (c), the air-permeable adhesive surface 9 is a surface that is affixed to the inside of an undergarment or the like. Moreover, the non-adhesive surface packaging material having stripe-like irregularities is a surface that contacts the skin. The breathable adhesive surface 9 is usually covered with a separator 17 or the like until it is used. Furthermore, the heating element of the present invention is hermetically stored in a non-breathable outer bag until used.
By attaching the double-sided uneven flexible heating element between the underwear and the skin by such a method, stable heat generation characteristics can be obtained and the heat can be efficiently transmitted to the body. In the present invention, the non-adhesive surface of the double-sided concavo-convex flexible heating element does not have an adhesive part, and can be a water-absorbing packaging material or a packaging material having a good feel against the skin. , Coldness just after pasting like conventional direct pasting type heating element, pain when peeling the fever bag, itching and rash of the pasted part does not occur, and discomfort associated with sweating, A very good feeling of use can be obtained without the exothermic bag falling off due to perspiration. In addition, since it is used on the inside of the underwear instead of being directly applied to the skin, it is not always kept in perfect contact, and the wearing site can be displaced relatively easily during use. Therefore, the risk of burns can be eliminated and a relatively wide area can be warmed.

The pressure-sensitive adhesive layer of the double-sided uneven heating element is provided on the air-permeable surface side of the heating element, and the pressure-sensitive adhesive layer is mainly provided in (1) a type in which the heating part is divided, and (2) in a division part. Type, (3) The heating element of the type where the adhesive layer is not in direct contact with the skin, which is one of the types provided in the section heating section and section section, is mainly worn between the underwear and the skin. It is applied to a heating element that warms and a method of using the heating element.
The double-sided uneven heating element of the present invention is formed by laminating a plurality of exothermic composition molded bodies formed from a moldable hydrous exothermic composition that generates heat upon contact with oxygen in the air, and is laminated on a substrate. The material is coated, the peripheral portion of the exothermic composition molded body is sealed and sealed between the base material and the coating material, a divided heat generating portion is formed, and a plurality of divided heat generating portions are sealing portions as intervals, Formed in stripes or dots, one side (breathable adhesive surface) of the heating element has air permeability and an adhesive layer, and the other side (non-adhesive surface) does not have an adhesive layer. It is a double-sided uneven heating element configured such that a breathable adhesive surface is attached to the inside of an underwear and a non-adhesive surface is used in contact with the skin.

In the double-sided uneven heating element of the present invention, a packaging material having air permeability and an adhesive layer is used for the air-permeable adhesive layer surface of the uneven heating element.
Usually, an adhesive layer is provided on the outer surface of the breathable packaging material by partially applying the adhesive by spraying, applying or printing, such as a melt blow method, so that the air permeability and the adhesiveness are maintained on one surface. Done.

  That is, the double-sided uneven heating element of this type of the present invention has the breathable property by attaching the breathable adhesive surface of the double-sided uneven heating element to the inside of the underwear between the underwear and the skin. A heating element characterized by having a function of maintaining a stable air permeability by directing the adhesive surface to the outside of the human body and directly warming the human body by bringing the non-adhesive surface into contact with the skin.

  Moreover, the heating element of the present invention warms the human body by holding the double-sided uneven heating element between the underwear and the skin, and one side (breathable adhesive surface) of the double-sided uneven heating element has air permeability and an adhesive. The other side (non-adhesive surface) has a structure without an adhesive layer. The breathable adhesive surface of the double-sided uneven heating element is attached to the inside of the underwear, and the non-adhesive surface is brought into contact with the skin. Can be used.

  Underwear in the present invention means clothing that is worn directly on the human body, and in addition to clothing usually called underwear, when wearing a shirt, blouse, polo shirt, etc. Included in underwear.

  In the double-sided uneven heating element of the present invention, one side (breathable adhesive surface) of the double-sided uneven heating element is provided with air permeability and an adhesive layer is provided, and an adhesive layer is provided on the other side (non-adhesive surface). In addition, the double-sided uneven heating element is attached by attaching a breathable adhesive surface between the underwear and the skin inside the underwear. This prevents the adhesive layer of the double-sided uneven heating element from coming into contact with the skin, causing itching or rash on the skin surface during wearing without feeling cold during wearing or pain when peeling off. This eliminates the discomfort associated with pasting.

  Further, according to the present invention, the breathable surface of the concavo-convex heating element on both sides is attached to the inside of the underwear, that is, the breathable surface faces the outside of the human body, so that the breathability is inhibited when the skin surface or the like adheres. Since it is not in contact with a flat surface, the desired heat generation characteristics can be maintained without being affected by the posture or movement during mounting. In addition, since the heat of the double-sided uneven heating element can be efficiently transmitted to the body without being directly applied to the skin, the amount of the moldable hydrous heat generating composition of the double-sided uneven heating element can be reduced, and it is lightweight. Thin, yet desired duration can be obtained.

  Furthermore, in the double-sided uneven heating element of the present invention, the packaging material on the surface of the double-sided uneven heating element that comes into contact with the skin can be set relatively arbitrarily because it does not have an adhesive layer. Considering the feel, heat transfer property, water absorption, etc., it is possible to make any material and any form, and it is possible to eliminate the uncomfortable feeling during use.

The packaging material constituting the base material or coating material of the present invention is not limited as long as it functions as a packaging material for a heating element. For example, non-breathable material, breathable material, water-absorbing material, non-water-absorbing material, non-stretchable material, stretchable material, stretchable material, non-stretchable material, foamed material, non-foamed material, non-heat as packaging material Examples thereof include a sealing material, a heat sealing material, and the like, and can be appropriately used according to a desired application in a desired form such as a film, a sheet, a nonwoven fabric, a woven fabric, and a laminate thereof.
In addition, the packaging material used for the exothermic heating element of the present invention is appropriately selected from any packaging materials that have been disclosed in the past, are commercially available, or are used for known disposable warmers or heating elements. it can.

The packaging material constituting the base material or the covering material of the present invention is a molded product such as a film or a sheet, a nonwoven fabric, a woven fabric, a knitted fabric, etc., and a non-water absorbent packaging material or a packaging material with water absorption is used.
Examples of the non-water absorbent packaging material include polyolefins such as polyethylene and polypropylene, and polyamides such as polyester and nylon.
Examples of the water-absorbing packaging material include cotton, silk, hemp, wool, polyacrylonitrile-based synthetic fiber, polyamide-based synthetic fiber, polyvinyl alcohol-based synthetic fiber, acetate fiber, triacetate fiber, and a nonwoven fabric made of recycled fiber. It is a woven fabric or a knitted fabric, and has a water absorption rate (measurement method: JIS L1096) of 2% or more, and a water absorption rate (measurement method: JIS L1096) selected from the fibers has a water absorption rate of 2% or more. Examples thereof include a nonwoven fabric or a woven fabric mainly composed of the above-mentioned fibers and a super absorbent packaging material.
As the superabsorbent packaging material, a packaging material using a superabsorbent resin powder, zeolite, silica gel, or a non-woven fabric holding diatomaceous earth or a superabsorbent packaging material coated with a superabsorbent resin is used. Examples include a non-woven fabric containing fibers using any of the above materials, a non-woven fabric containing fibers that are hollow and have a large number of micropores on the surface, or a non-woven fabric containing non-woven fabric containing fibers that have a large number of cross-sectional shapes or cross-layers. Can be mentioned.
The non-adhesive surface packaging material is preferably a soft and flexible material.
Substances suitable as a non-adhesive surface packaging material are not limited, but examples include molded films and sheets, woven fabrics, knitted fabrics, and non-woven fabrics.
Woven fabrics, knitted fabrics, and nonwoven fabrics are manufactured through processes such as spinning, spinning, using air, thermally integrated, wet, melted and blown using fibers. Contains air.
Examples of the material composition of the non-adhesive packaging material include cotton, polyester, polyethylene, polypropylene, and nylon.
The packaging material for the adhesive surface is a soft, flexible, good-feeling, non-irritating packaging material for the skin, is a packaging material that absorbs water, or is a packaging material that combines these properties.
Examples of the adhesive surface packaging material include, but are not limited to, molded films and sheets, woven fabrics, knitted fabrics, and nonwoven fabrics.
Woven fabrics, knitted fabrics, and nonwoven fabrics are manufactured through processes such as spinning, spinning, using air, thermally integrated, wet, melted and blown using fibers. Contains air.
The material composition of the adhesive packaging material is cotton, silk, hemp, wool, polyacrylonitrile synthetic fiber, polyamide synthetic fiber, polyvinyl alcohol synthetic fiber, acetate fiber, triacetate fiber, and recycled fiber, polyester, polyethylene, polypropylene, Nylon etc. are mentioned as an example.

As the air permeable film used in the present invention, for example, a porous film using polyethylene, polypropylene, polyfluorinated ethylene film or the like is preferably used, and the pore diameter is determined according to the necessary air permeability. The amount of ventilation is designed in relation to the heat generating agent to be used, depending on the required heat generation amount and temperature.
The porous film is a film having fine through-holes having a maximum pore diameter of about 0.001 to 20 μm by a methanol bubbling method, for example, those provided with through-holes by biaxially stretching a synthetic resin film, Alternatively, an inorganic fine powder such as calcium carbonate is dispersed in melted polyethylene, polypropylene, etc., and then extruded into a film, and the obtained film is further stretched to provide through holes.
In addition, it is also possible to use a packaging material made of a nonwoven fabric in which fibers are laminated and thermocompression-bonded and whose air permeability is controlled, or a specific air-permeable film such as a polyethylene film, which is perforated by perforation.

  On the other hand, the non-breathable film may be any film that does not substantially transmit oxygen. For example, polyolefins such as polyethylene, polypropylene, and polyptadiene, polyvinyl chloride, polyvinylidene chloride, polyester, polyether, polysulfone, and polyamide. It is manufactured and has a thickness of about 20 μm to 1 mm.

In the double-sided uneven heating element of the present invention, the air-permeable adhesive surface has air permeability and is provided with an adhesive layer as described above. The pressure-sensitive adhesive used for the pressure-sensitive adhesive layer has the desired adhesive strength, does not cause transfer to underwear, does not adversely affect the human body and the environment, and is stored for a long time until it is used as a fever bag Any material that does not change in quality can be used.
Further, the surface of the pressure-sensitive adhesive layer is usually coated with a separator or the like so as not to stick to other objects until it is used.

In the double-sided uneven heating element of the present invention, the non-adhesive surface in contact with the skin is configured not to be provided with an adhesive layer.
Therefore, the material can be appropriately set according to desired characteristics such as touch, thermal conductivity, water absorption against sweat and the like. For example, a single packaging material for a non-breathable film such as a polyethylene film or a polypropylene film, or a packaging material in which a polyethylene film or a polypropylene film is bonded to a non-woven fabric or a woven fabric, and a packaging material obtained by raising the surface of these materials. Can be mentioned.

  Further, in the double-sided uneven heating element of the present invention, the non-adhesive surface packaging material is made of a nonwoven fabric or a woven fabric mainly composed of water-absorbing fibers so that sweat is absorbed when perspiration occurs. It is preferable to be comprised with the packaging material using cloth. Examples of water-absorbing fibers having a water absorption rate of 2% or more include cotton, silk, hemp, wool, polyacrylonitrile-based synthetic fibers, polyamide-based synthetic fibers, polyvinyl alcohol-based synthetic fibers, acetate fibers, triacetate fibers, and regenerated fibers. be able to. Furthermore, as a nonwoven fabric excellent in water absorption, a nonwoven fabric in which a superabsorbent polymer is held in the nonwoven fabric can be used. In addition, the nonwoven fabric or woven fabric which has these fibers as a main component is also a thing with a comparatively favorable touch with respect to skin.

  As the hydrophilic nonwoven fabric used in the present invention, for example, hydrophilic ones such as rayon, cotton, pulp, etc., and a mixture and combination thereof are used. The thickness of the nonwoven fabric is usually about 100 μm to 1 mm.

  Furthermore, a highly water-absorbing packaging material with high sweat absorption can be used for the non-adhesive surface packaging material. For example, a non-woven fabric containing a fiber whose surface is coated with a highly water-absorbing resin, a non-woven fabric containing a hollow fiber having a large number of micropores on its surface, and a capillary action by forming a large number of cross-sectional shapes or multiple layers A non-woven fabric or the like containing a fiber having a slag is used.

  In addition, the nonwoven fabric or film which hold | maintained the water absorbing inorganic compound can also be used for the non-adhesive surface packaging material. For example, a nonwoven fabric in which a powder of diatomaceous earth, zeolite, silica gel or the like is held in a nonwoven fabric, a film in which a relatively large amount of powder of silica, alumina or the like is held in a synthetic resin such as polyethylene can be used.

  Furthermore, antibacterial properties can be imparted to the non-adhesive surface packaging material as desired. Antibacterial agents that can be used in the present invention have high safety without affecting the physiological function of the human body, and do not produce harmful substances even when discarded. There are various types of antibacterial agents such as inorganic, quaternary ammonium, guanidine, phenol, fatty acid ester, and natural products. There is no particular limitation on the method of incorporating the antibacterial agent into the packaging material, but for example, the antibacterial agent can be applied and impregnated into a nonwoven fabric, woven fabric, film, paper, or other packaging material by a gravure roll method, dip roll method, etc. It can also be attached by a method such as spraying or printing.

  In the double-sided uneven heating element of the present invention, when the non-adhesive surface is also air permeable, the air permeability is inhibited when the surface adheres to the skin. Because of this, the heat generation characteristics fluctuate, so that the air permeability of the double-sided uneven heating element is usually only the air-permeable adhesive surface.

  However, the double-sided uneven heating element of the present invention does not exclude providing a non-adhesive surface packaging material of the double-sided uneven heating element with air permeability. That is, considering the case where a packaging material that can ensure air permeability even when the non-adhesive surface packaging material is in close contact with the skin, or the case where the breathability of the underwear has a unique property is considered. Thus, the non-adhesive surface can be made breathable. Further, when a slight variation is allowed in the heat generation characteristics, the non-adhesive surface can be made air permeable.

However, even in these cases, it is preferable that the breathable adhesive surface of the double-sided uneven heating element has a breathable main body, and the air permeability of the non-adhesive surface is usually 1/2 of the breathability of the breathable adhesive surface. Hereinafter, it is preferably 1/3 or less. As described above, when the non-adhesive surface packaging material is also provided with air permeability, normally, the air permeability of the air-permeable adhesive surface is appropriately adjusted in accordance with the amount of air flow.
Although there is no restriction | limiting in particular in the position in which an adhesive layer is provided, In order to affix on an underwear efficiently with a small area, it is preferable to disperse | distribute and provide uniformly on a breathable adhesive surface. For example, the breathable pressure-sensitive adhesive surface may be partially printed in advance on a breathable packaging material, or coated with a pressure-sensitive adhesive on almost the entire surface of the non-breathable packaging material, and then opened to make it breathable. It can also be obtained by this method.

In the double-sided uneven heating element of the present invention, the air permeability of the air-permeable pressure-sensitive adhesive surface means the air permeability in a state where an adhesive is applied.
The air permeability of the heating element of the present invention is usually the air permeability according to the Gurley method (JISP 8117) in terms of the oxygen diffusion amount on the ventilation surface having the adhesive layer and the ventilation surface not having the adhesive layer, preferably 80 to 15. 1,000 seconds / 100 cc, more preferably 1,000 to 15,000 seconds / 100 cc, still more preferably 1,300 to 15,000 seconds / 100 cc, still more preferably 1,300 to It is 10,000 seconds / 100 cc, and more preferably 5,000 to 10,000 seconds / 100 cc.
If it exceeds 15,000 seconds / 100 cc, the exothermic temperature is too low. There is a disadvantage that it is too hot at 80 seconds / 100 cc or less.
In addition, when the heating element of the present invention is mounted between the skin and the undergarment, heat is transferred to the skin while the heating element is in contact with the skin. It is preferable to design to have.
Moreover, when using it for temperature rising and high temperature use for heat retention uses, such as food and drink, Preferably, it is 80-300 second / 100cc.

The fixing means is not limited as long as it has a fixing ability capable of fixing the heating element to a required portion. Furthermore, the fixing means is preferably removable. Adhesive layers, key hooks, hook buttons, hook-and-loop fasteners such as Velcro, magnets, bands, strings and the like, and combinations thereof, which are generally employed as the fixing means, can be arbitrarily used. In the case of a band, the adjustment fixing means may be further configured by a combination of a hook-and-loop fastener and an adhesive layer. There are no restrictions on the installation method, installation location, installation pattern, and the like of the fixing means, and it may be determined as appropriate. Moreover, you may provide a separator to a fixing means as protection until it is used. The separator may be provided with a cut or the like such as a split to facilitate peeling.
The fixing means of the present invention can be used by appropriately selecting fixing means (including attachment means that can be removed) that have been disclosed in the past, are commercially available, or are used for known disposable warmers and heating elements.

  The hook-and-loop fastener is known by a trade name such as Velcro (registered trademark), Velcro fastener (registered trademark), Velcro fastener, hook and loop tape, and the like. It has a fastening function in combination with a hook which is a male fastener to be obtained.

The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive. The pressure-sensitive adhesive is not limited as long as the double-sided uneven heating element can be fixed, and those conventionally used for chemical warmers, heating elements and poultices, and those technically disclosed can be used.
As an example of installation of the adhesive layer,
1) The double-sided uneven heating element provided so that the adhesive material layer can removably attach the double-sided uneven heating element to at least one part of the exposed part of the double-sided uneven heating element,
2) The adhesive layer is a means for fixing the double-sided uneven heating element to the inner part of the user's clothes so that the B-side of the heating element is placed directly on the user's body. The double-sided uneven heating element, which is located on the A surface of the section heating part, is provided so that the double-sided uneven heating element can be removably attached,
3) The pressure-sensitive adhesive layer is provided on each side of the double-sided uneven heating element and on both ends of the heating element extending to both ends of the heating element and at least both longitudinal ends of the heating element. Double-sided uneven heating element,
4) The pressure-sensitive adhesive layer includes a top region of each divided heat generating part on one side of the double-sided uneven heating element, and extends to both ends of the heating element to extend to both ends and at least both ends in the longitudinal direction of the heating element. Double-sided uneven heating element that is provided in the part and is ventilated mainly from the side part of the divided heating part of the section,
5) A double-sided uneven heating element in which the pressure-sensitive adhesive layer is provided on one side of the double-sided uneven heating element as a mesh-like breathable adhesive layer provided by a nozzle injection method such as a melt blow method or a curtain coating method. ,
6) The pressure-sensitive adhesive layer of 2), 3) and 4) fixes the double-sided uneven heating element to the inner part of the user's clothes, and the B-side of the heating element is directly against the user's body. An example is a double-sided uneven heating element that is positioned on the A surface of the section heating unit so as to be placed and can be removably attached to the double-sided uneven heating element.

The pressure-sensitive adhesive layer is composed of a water retention agent, a water-absorbing polymer, a pH adjuster, a surfactant, an organosilicon compound, a hydrophobic polymer compound, a pyroelectric material, an antioxidant, an aggregate, a fibrous material, a moisturizing agent, and a function. You may contain at least 1 sort (s) chosen from the additional component which consists of a sex substance or these mixtures.
The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not limited as long as it has an adhesive force necessary to adhere to the skin and clothes, and is solvent-based, aqueous-based, emulsion-type, hot-melt-type, reactive, Various forms such as a pressure-sensitive system or a non-hydrophilic adhesive, a mixed adhesive, a hydrophilic adhesive (gel, etc.) are used.
Moreover, as an adhesive layer, even if it has air permeability, it may not have air permeability. What is necessary is just to select suitably according to a use. As the air permeability, it is sufficient if the air permeability is as a whole. For example, a pressure-sensitive adhesive layer in which a pressure-sensitive adhesive partially exists, a part in which a pressure-sensitive adhesive does not exist partially is present, and the whole region has air permeability is given as an example.
When the pressure-sensitive adhesive is laminated on the air-permeable base material and / or the covering material as it is, as a method of maintaining the air-permeability, for example, the pressure-sensitive adhesive layer is partially formed by printing or transferring the pressure-sensitive adhesive. Laminate and use the non-laminated part as a ventilation part, and move the adhesive in a two-dimensional direction, such as moving it in one direction or moving it in a zigzag while drawing a circle like a thread, Examples include a method in which the gap between the pressure-sensitive adhesives has air permeability or moisture permeability, a method of foaming the pressure-sensitive adhesive, or a layer formed by a melt blow method.

Examples of the pressure-sensitive adhesive constituting the non-hydrophilic pressure-sensitive adhesive layer include acrylic, urethane, rubber, silicon, polyisoprene, polyisobutene, styrene-isoprene-styrene (SIS), and styrene-isoprene. Can be used. In particular, an acrylic or SIS system that can be hot-melt processed is preferably used.
As the SIS-based adhesive, a styrene-butadiene-styrene block copolymer (SBS), a styrene-isoprene-styrene block copolymer (SIS), or a hydrogenated type thereof (SEBS, SIPS) is used as a base polymer. An example is a styrene-based hot melt pressure-sensitive adhesive.

The hydrophilic pressure-sensitive adhesive constituting the hydrophilic pressure-sensitive adhesive layer is not particularly limited as long as it has a hydrophilic polymer or a water-soluble polymer as a main component, has adhesiveness, and is hydrophilic as the pressure-sensitive adhesive.
Specifically, hydrophilic polymers such as polyacrylic acid, water-soluble polymers such as sodium polyacrylate and polyvinylpyrrolidone, carboxymethylcellulose, sodium carboxymethylcellulose, hydroxyethylcellulose, dry aluminum hydroxide and metal salt of metasilicate aluminate, etc. Cross-linking agents, softeners such as glycerin and propylene glycol, excipients, hydrophilic adhesives composed mainly of water, and hydrophilic acrylic monomers such as (meth) acrylamide and hydroxyethyl acrylate Copolymers with alkyl (meth) acrylates such as butyl (meth) acrylate and ethylhexyl (meth) acrylate as protective colloids and (meth) acrylates such as butyl (meth) acrylate and ethylhexyl (meth) acrylate Wet surface adhesive emulsion type pressure-sensitive adhesive, which is a copolymer mixture obtained by polymerizing alkyl alkyl ester and acrylic monomers such as acrylonitrile and acrylic acid, carboxylic acid monomers such as (meth) acrylic acid, butyl acrylate, and ethylhexyl An example is a wet surface adhesive emulsion type pressure-sensitive adhesive which is a copolymer mixture with a (meth) acrylic acid alkyl ester such as (meth) acrylate.

Moreover, when the adhesive layer is a hydrophilic adhesive layer, if there is a difference in water retention between the hydrophilic adhesive layer and the exothermic composition molded body, a packaging material such as a base material between them Moisture movement takes place via this, and inconvenience occurs for both. This happens especially during storage. In order to prevent this, the moisture permeability of the moisture-proof packaging material, which is a packaging material interposed between them, is not limited as long as moisture movement can be prevented within a range that does not affect the heat generation performance, but the rissy method (Lyssy method) ), Preferably 2 g / m ² / day or less, more preferably 1.0 g / m ² / day or less, still more preferably 0.5 g / m ² / day or less, Preferably it is 0.01-0.5 g / m < ² > / day. Here, it is a value under the conditions of 40 ° C. and 90% RH under atmospheric pressure. In addition, the said moisture-proof packaging material can be used as a base material or a covering material, and may be laminated on the base material or the covering material alone.
The moisture-proof packaging material is not limited as long as moisture migration between the exothermic composition molded body and the hydrophilic pressure-sensitive adhesive layer can be prevented, but a biaxially stretched polypropylene film, a metal vapor-deposited film, a metal oxide vapor-deposited film, a metal A foil laminate film is an example. The non-breathable material can also be used.
In addition, a packaging material such as a moisture-proof packaging material disclosed in Japanese Patent Application Laid-Open No. 2002-200108 can also be used, and the description is incorporated into the present invention.
When a water-containing hydrophilic pressure sensitive adhesive (gel, etc.) is used for the pressure sensitive adhesive layer, a reaction accelerator such as sodium chloride in the heat generating composition is used to adjust the water balance between the heat generating composition and the pressure sensitive adhesive layer. The content of a substance having a water securing ability such as a water-absorbing polymer is in the range of 10 to 40% by weight, preferably in the range of 1.5 to 40% by weight, more preferably in the range of 15 to 30% with respect to the exothermic composition. You may adjust in the range of weight%.
Examples of the pressure-sensitive adhesive having good moisture permeability and low irritation to the skin include water-containing pressure-sensitive adhesives (hydrophilic pressure-sensitive adhesives and gels) such as JP-A-10-265373 and JP-A-9-87173. No. 6-145050, JP-A-6-199660, adhesives that can be hot-melt coated, and rubber-based adhesives described in JP-A-10-279466 and JP-A-10-182408 JP-A-10-279466 and JP-A-10-182408, rubber-based pressure-sensitive adhesives, and emulsion-type pressure-sensitive adhesives having wet surface adhesion disclosed in JP-A-2004-263054 and JP-A-2004-263055, An aqueous emulsion type adhesive having a wet surface adhesion of 2001-143294 is also useful and is incorporated herein by reference in its entirety.

The method, pattern, and shape of the pressure-sensitive adhesive layer are not limited as long as the heating element can be fixed, and may be provided on the entire surface, or may be provided partially or intermittently. Examples include various patterns and shapes such as a net shape, a stripe shape, a dot shape, and a belt shape. A net-like (spider web) pressure-sensitive adhesive layer by a melt blow method is useful.
For forming the air-permeable pressure-sensitive adhesive layer, for example, a hot-melt type pressure-sensitive adhesive material can be applied by an appropriate method such as a melt-blow method, a curtain spray method, or a gravure method in which a hot-melt adhesive material is blown and developed through hot air while being melted. For example, a method of fiberizing or partially coating an active substance and spreading and depositing it on a nonwoven fabric or a porous film is used.

  In the base material, the covering material, the pressure-sensitive adhesive layer, and the separator constituting the double-sided uneven heating element, at least one of them or part thereof is a character, a pattern, a symbol, a number, a pattern, a photograph, a picture, a colored portion Any one or more may be provided. Moreover, when each material and layer are comprised by the multilayer, the installation layer should just determine suitably.

  In the base material, the covering material, the pressure-sensitive adhesive layer, and the separator constituting the double-sided uneven heating element, each may be any of transparent, opaque, colored, non-colored, and the like. Moreover, the layer which comprises at least 1 layer among the layers which comprise each material and each layer may be colored in the color different from another layer.

  The exothermic composition molded body of the present invention is not limited as long as the exothermic composition molded body can be laminated on a substrate and has a segmental exothermic part, but the exothermic composition molded body molded from the moldable water-containing exothermic composition, a small exothermic sheet or sheet-like shape An example of the exothermic composition molded body formed from the exothermic pieces is given.

  The exothermic composition that can be used in the present invention is not limited as long as the double-sided uneven heating element of the present invention can be formed, but the exothermic composition has iron powder, a carbon component, a reaction accelerator and water as essential components, and has an easy water value. Contains excess water of 0.01 to 13.5, has a moldability of a molding degree of 5 or more, moisture in the exothermic composition does not function as an air barrier layer, and immediately after production, 20 ° C. without wind A moldable excess water exothermic composition that generates heat with a temperature increase of 5 ° C. or more within 5 minutes after being left in the air in the above environment is preferred.

In addition to the above components, the moldable excess water exothermic composition of the present invention comprises a molding aid, a water retention agent, a water-absorbing polymer, a hydrogen generation inhibitor, a pH adjuster, an aggregate, a functional substance, a polyoxy Nonionics such as ethylene alkyl ether, amphoteric ions, anions, cationic surfactants, hydrophobic polymer compounds such as polyethylene and polypropylene, organosilicon compounds such as dimethyl silicone oil, pyroelectric materials, far-infrared emitting materials such as ceramics, negative ion generator such as tourmaline, heating aids such as FeCl _2, iron metal other than silicon or aluminum, metal oxides other than iron oxide, such as manganese dioxide, an acidic substance such as hydrochloric acid or maleic acid or acetic acid, pulp Such as a fibrous material such as urea, a fertilizer component such as urea, a humectant such as glycerin and D-sorbitol, a release agent or a mixture thereof. You may contain at least 1 type chosen from minutes.
In addition, the component of the exothermic composition of this invention can select and use suitably any component of the exothermic composition currently disclosed or marketed or used for a well-known disposable warmer and a heat generating body.

  Furthermore, the moldable surplus water exothermic composition of the present invention combines 0.001 to 5% by mass of a molding aid and surplus water having a mobile water value of 0.01 to 13.5 with respect to the mass of the iron powder. As a result, the moldability is further enhanced, the prevention of shape loss of the exothermic composition molded body is reinforced, and the shape maintenance of the exothermic composition molded body is reinforced even when moving to the sealing step. Since the molding aid is 0.001 to 5% by mass with respect to the mass of the iron powder, the exothermic characteristics of the water-containing exothermic composition and the exothermic composition molded body are not affected by the molding aid, and the moldable excess water is contained. After the exothermic composition is formed, it generates heat in contact with air without removing water such as water absorption, dehydration, water absorption and dewatering, and without adding water or an aqueous solution of a water-soluble component.

The term “to generate heat with a temperature rise of 1 ° C. within 5 minutes after being left in air in a 20 ° C. environment immediately after production” means a ripening period such as 24 hours after production of the exothermic composition. 5 minutes when the exothermic composition is left on a non-water-absorbing material such as a polyethylene film, a polyester film or a sheet in air at 20 ° C. without air immediately after the production of the exothermic composition. The exothermic composition generates heat with a temperature increase of 1 ° C.
In the following exothermic composition temperature rise measurement method, the temperature rise within 5 minutes is preferably 1 ° C or higher, more preferably 10 ° C or higher, still more preferably 20 ° C or higher, and further preferably within 3 minutes. Further, the temperature rise is 10 ° C. or more.
Here, the exothermic composition temperature rise measuring method uses the exothermic composition immediately after production or the exothermic composition molded body, and the sample is in contact with air when measuring under the condition of no wind and ambient temperature of 20 ± 1 ° C. Measure while ready.
1. In the case of the exothermic composition 1) A magnet is provided so as to cover the shape of the punched hole of the mold near the center of the back surface of the vinyl chloride support plate (thickness 5 mm × length 600 mm × width 600 mm) of the support base with legs.
2) Place the temperature sensor on the center of the support plate.
3) A polyethylene film with a thickness of 25 μm × length 250 mm × width 200 mm with an adhesive layer having a thickness of about 80 μm is attached to the support plate via the adhesive layer so that the center of the polyethylene film comes to the sensor.
4) On the central part of the polyethylene film, place a template plate of length 250 mm x width 200 mm with a hole 80 mm long x 50 mm wide x 3 mm high, place a sample near the hole, and place a push-in plate The sample is moved along the template, and the sample is pushed into the punch hole. The sample is scraped along the template surface while being pushed in (mold press molding), and the sample is filled into the die. Next, temperature measurement is started except for the magnet under the support plate.
The exothermic temperature is measured by using a data collector, measuring the temperature for 10 minutes at a measurement timing of 2 seconds, and determining the heat generation startability with the temperature after 3 minutes.
2. For exothermic composition molded bodies,
1) to 3) are the same as in the case of the exothermic composition.
4) The exothermic composition molded body is placed on the center of the polyethylene film, and temperature measurement is started.
The exothermic temperature is measured using a data collector, measuring the temperature for 10 minutes at a measurement timing of 2 seconds, and measuring the temperature at 0 minute, 1 minute, 3 minutes, 5 minutes, 6 minutes, and 7 minutes. The exothermic property is judged at a temperature within 5 minutes.

In the production of the heating element by the mold forming method of the present invention, the moldable water-containing exothermic composition is formed on the substrate while moving the substrate at a constant speed and moving the dropping port for dropping the exothermic composition at the same speed as the substrate. Since the exothermic composition molded body obtained by molding the product is laminated, the stopping and starting of the base material are hardly repeated, which is excellent in increasing the production speed.
Further, when the exothermic composition is water-containing, as described above, the exothermic composition, particularly iron powder and air, is produced during the period from the production of the exothermic body until the obtained exothermic body is sealed in an airtight outer bag. Oxidation reaction occurs, and the initial heat generation characteristics of the heat generating composition are improved, so that there is an advantage that a heating element with improved initial heat generation characteristics can be obtained.

  In the moldable excess water exothermic composition of the present invention, the amount of excess water in the exothermic composition is defined as an easy water value.

  The mobile water value of the moldable excess water exothermic composition of the present invention is preferably 0.01 to 13.5, more preferably 0.01 to 13, and still more preferably 0.01 to 12. More preferably 1 to 12, more preferably 2 to 12, further preferably 3 to 12, still more preferably 4 to 12, still more preferably 5 to 12, and still more preferably. 5-11.

The solid exothermic composition raw material of the moldable excess water exothermic composition of the present invention is a powder, and the particle size thereof is preferably 500 μm or less, more preferably 425 μm or less, and further preferably 300 μm or less, More preferably, it is 250 micrometers or less, More preferably, it is 212 micrometers or less, More preferably, it is 150 micrometers or less, More preferably, it is 106 micrometers or less, More preferably, it is 90 micrometers or less.
The particle size is a value obtained by displaying the amount passing through the sieve in units of μm from the sieve opening (diameter of the sieve).
The moldability and shape retention of the moldable excess water exothermic composition are improved as the particle size of the water-insoluble solid component excluding the reaction accelerator, the water-soluble substance and water is smaller.

The blending ratio of the moldable excess water exothermic composition is not particularly limited, but the carbon component is 1.0 to 50 parts by weight and the reaction accelerator is 1.0 to 100 parts by weight with respect to 100 parts by weight of the iron powder. It is preferable to select the blending ratio so as to be 50 parts by weight and 1.0 to 60 parts by weight of water.
More preferably, the following composition may be added to the exothermic composition with respect to the iron powder at the following blending ratio.
That is, with respect to 100 parts by weight of iron powder, 0.001 to 5 parts by weight of molding aid and release agent, 0.01 to 10 parts by weight of water retention agent, 0.01 to 20 parts by weight of water-absorbing polymer, pH Conditioner 0.01-5 parts by weight, hydrogen generation inhibitor 0.01-12 parts by weight, metal other than iron 1.0-50 parts by weight, metal oxide other than iron oxide 1.0-50 parts by weight, interface 0.01 to 5 parts by weight of active agent, hydrophobic polymer compound, aggregate, fibrous material, functional substance, organosilicon compound and pyroelectric substance are each 0.01 to 10 parts by weight, humectant, fertilizer component, The exothermic auxiliary is preferably 0.01 to 10 parts by weight and 0.01 to 1 part by weight of an acidic substance, respectively. In addition, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed.
This blending ratio can also be applied to a reaction mixture and an exothermic mixture. The mobile water value of the reaction mixture is preferably less than 0.01.
Moreover, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed.

  The content of the molding aid is not limited as long as the heat generation performance is not significantly reduced, but is preferably 0.001 to 5% by weight, more preferably 0.001 to 3% with respect to 100 parts by weight of the iron powder. Parts by weight, more preferably from 0.001 to 1 part by weight, still more preferably from 0.01 to 1 part by weight, still more preferably from 0.01 to 0.5 part by weight, still more preferably 0. 0.01 to 0.2 parts by weight, more preferably 0.01 to 0.1 parts by weight, still more preferably 0.01 to 0.099 parts by weight, and still more preferably 0.01 to 0. 095 parts by weight.

In order to improve the rise of the exothermic reaction of the moldable excess water exothermic composition, it is preferable to use an exothermic composition subjected to oxidation treatment or an exothermic composition containing activated iron powder.
1. Oxidized formable surplus water exothermic composition There is no limitation on the method for producing the oxidized formable surplus water exothermic composition, but the reaction mixture or exothermic composition is allowed to stand or mix in an oxidizing gas environment. By way of example, a method for producing an exothermic mixture in which the temperature rise is 1 ° C. or higher is given as an example. As an example, the oxidizing gas contact treatment method of the reaction mixture includes iron powder, a reaction accelerator and water as essential components, a water content of 0.5 to 20% by weight, and a mobile water value of less than 0.01. The mixture is contact-treated with an oxidizing gas, and the temperature rise of the reaction mixture is raised to 1 ° C. or more within 10 minutes.
Further, if desired, water or an aqueous solution of a reaction accelerator is added to obtain an exothermic composition having a desired water content.
Components other than the essential components may be added in a desired step of the manufacturing process.
Further, the oxidizing gas contact treatment may be present in a container or in a breathable sheet-like material such as a nonwoven fabric.
The oxidizing gas contact treatment may be any of stirring, non-stirring, flowing or non-flowing, and may be a batch type or a continuous type.
2. Activated iron powder-containing exothermic composition An exothermic composition containing activated iron powder.

Examples of the iron powder include, but are not limited to, cast iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof. Furthermore, these iron powders may contain carbon or oxygen, or may contain other metals, such as iron containing 50% or more of iron. The type of metal contained as an alloy or the like is not particularly limited as long as the iron component acts as a component of the exothermic composition, but examples include metals such as aluminum, manganese, copper, and silicon, and semiconductors. The metal of the present invention includes a semiconductor.
In the iron powder of the present invention, the content of metals other than iron is usually 0.01 to 50% by weight, preferably 0.1 to 10% by weight, based on the entire iron powder.

As the iron powder having an oxygen-containing film on at least a part of the iron surface,
A. An active iron powder obtained by subjecting an essential component of an exothermic composition or an acidic substance or other necessary components to contact with an oxidizing gas, partially oxidizing the iron component, and at least partially oxidizing the surface of the iron component. An active iron powder having a wustite content of 2 to 50% by weight as an X-ray peak intensity ratio of iron C.I. Iron powder having an iron oxide film having a thickness of 3 nm or more on the surface. An example of the active iron powder is a mixture of iron powder other than the active iron powder.

The thickness of the iron oxide film that is an oxygen-containing film covering the surface of the iron powder is usually 3 nm or more, preferably 3 nm to 100 μm, more preferably 30 nm to 100 μm, using Auger electron spectroscopy. More preferably, it is 30 nm-50 micrometers, More preferably, it is 30 nm-1 micrometer, More preferably, it is 30 nm-500 nm, More preferably, it is 50 nm-300 nm. By making the thickness of the iron-containing film of iron 3 nm or more, the thickness of the iron-containing film of iron can exert the effect of promoting the oxidation reaction, and contact the oxidizing gas such as air to immediately start the oxidation reaction. Can be started. If the thickness of the iron oxygen-containing coating is 100 μm or more, the heat generation time may be shortened, but it can be used depending on the application.
The other is active iron powder having wustite, and the amount of wustite is usually 2 to 50% by weight, preferably 5.01 to 50% by weight, as an X-ray intensity ratio with iron. Preferably it is 5.01 to 40 weight%, More preferably, it is 6 to 40 weight%, More preferably, it is 7 to 30 weight%, More preferably, it is 7 to 25 weight%. Even if it exceeds 50% by weight, the heat buildup is good, but the heat generation duration is shortened. If it is less than 2% by weight, the heat build-up property becomes dull.

The water may be from a suitable source. There are no restrictions on the purity and type.
The water content preferably contains 1 to 70% by weight of the exothermic composition.
In the case of the reaction mixture and the exothermic mixture before the contact treatment with the oxidizing gas, 0.5 to 20% by weight, more preferably 1 to 20% by weight, still more preferably 3 to 20% by weight of the reaction mixture or the exothermic mixture. %, More preferably 4 to 15% by weight.

  The carbon component is not limited as long as it is a carbonaceous material. Examples thereof include carbon black, graphite, activated carbon and the like.

The reaction accelerator is not limited as long as it can accelerate the exothermic reaction.
Examples include metal halides such as sodium chloride and potassium chloride, metal sulfates such as potassium sulfate, nitrates such as sodium nitrate, acetates such as sodium acetate, and carbonates such as ferrous carbonate. . The electrolyte currently used for the well-known disposable warmer and a heat generating body can also be used.
These reaction accelerators are usually used as an aqueous solution, but can also be used as a powder. When used as an aqueous solution of a reaction accelerator, it is treated as a liquid exothermic composition raw material, and the particle size of the solid raw material for preparing the liquid exothermic composition raw material is not limited.

  There is no restriction on the water retention agent as long as it can retain water. Examples include wood powder, pulp powder, activated carbon, vermiculite, terra balloon, and fossil.

  The molding aid is a moldability improving agent that improves the moldability of the excess water heating composition in combination with moisture.

  The molding aid is a moldability improving agent that improves the moldability of the excess water exothermic composition by combination with moisture.

  The molding aid is not limited as long as it is water-soluble or hydrophilic and improves the moldability of the excess water heating composition, but glucose, fructose, sorbitol, maltose, lactose, saccharose, trehalose, pectin Sugars such as mannitol, sorbitol, maltitol, erythritol, xylitol, corn starch, wheat starch, rice starch, corn starch, potato starch, dextrin, pregelatinized starch, partially pregelatinized starch, hydroxypropyl starch, carboxyl Methyl starch, α-cyclodextrin, β-cyclodextrin, starch of pullulan sugar, crystalline cellulose, carboxymethylcellulose, hydroxypropylcellulose, low-substituted hydroxypro Cellulose such as pill cellulose, hydroxypropylmethylcellulose, methylcellulose, sodium carboxymethylcellulose, carmellose, carmellose calcium, carmellose sodium, croscarmellose sodium, ethylcellulose, hydroxymethylcellulose, polyvinylpyrrolidone, polyvinyl alcohol, stearate, polyacryl Sodium acid, agar, gum arabic, sodium alginate, gelatin, corn syrup, mannitol syrup, carrageenan, tant gum, karaya gum, xanthan gum, julan gum, pullulan, guardland, gelatin, albumin, casein, soy protein, wheat protein, arapinogalactan, Gua gum, locust bean gum, tamarind seed gum, cod Rubber, tragacanth rubber, poly-N-vinylacetamide, acrylic acid-starch copolymer, microcrystalline cellulose, N-vinylacetamide copolymer, bentonite, kaolin, sodium silicate, calcium chloride, montmorillonite, aluminum silicate or polyvinyl acetate One example is the use of water-dispersed emulsions such as emulsions alone or in combination.

The water-absorbing polymer is not particularly limited as long as it has a crosslinked structure and has a water absorption ratio of 3 times or more with respect to its own weight. Moreover, what cross-linked the surface may be used. Conventionally known water-absorbing polymers and commercially available products can also be used.
Examples of the water-absorbing polymer include a crosslinked poly (meth) acrylic acid, a crosslinked poly (meth) acrylate, a crosslinked poly (meth) acrylate having a polyoxyalkylene group, a crosslinked poly (meth) acrylamide, Copolymer cross-linked product of (meth) acrylate and (meth) acrylamide, copolymer cross-linked product of hydroxyalkyl (meth) acrylate and (meth) acrylate, starch-poly (meth) acrylonitrile graft copolymer Examples include saponified products, starch-poly (meth) acrylic acid (salt) graft cross-linked copolymers, polyisobutylene maleic acid (salt) cross-linked polymers, and the like. These may be used alone or in combination of two or more.

The pH adjuster is not limited as long as the pH can be adjusted. There are weak salts of alkali metals or alkaline earth metals, hydroxides, Na ₂ CO ₃ , NaHCO ₃ , Na ₃ PO ₄ , Na ₂ HPO ₄ , Na ₅ P ₃ O ₁₀ , Ca (OH) _2, etc. As an example.

  The hydrogen generation inhibitor is not limited as long as it suppresses the generation of hydrogen. As an example, at least one sentence selected from the group consisting of sulfur compounds, oxidizing agents, alkaline substances, sulfur, antimony, selenium and tellurium is composed of two or more kinds. Examples of sulfur compounds include compounds with alkali metals and alkaline earth metals, metal sulfides such as calcium sulfide, metal sulfites such as sodium sulfite, and metal thiosulfates such as sodium thiosulfate.

  The aggregate is not particularly limited as long as it is useful as a filler and / or useful for making the exothermic composition porous. Fossil coral (coral fossil, weathered reef coral, etc.), bamboo charcoal, Bincho charcoal, silica-alumina powder, silica-magnesia powder, kaolin, crystalline cellulose, colloidal silica, pumice, silica gel, silica powder, mica powder, clay, talc, Examples include synthetic resin powders and pellets, foamed synthetic resins such as foamed polyester and polyurethane, algae, alumina, and fiber powder.

  Examples of the fibrous material include, for example, vegetable fibers (cotton, kabok, wood pulp, non-wood pulp, peanut protein fiber, corn protein fiber, soybean protein fiber, mannan fiber, rubber fiber). , Hemp, Manila hemp, sisal hemp, New Zealand hemp, Rafu hemp, eggplant, rush, straw, etc.), animal fiber (wool, goat hair, mohair, cashmere, alkapa, angora, camel, vicuuna, silk, feathers, down, feather , Algin fiber, chitin fiber, casein fiber, etc.) and mineral fiber (asbestos, etc.). Examples of synthetic fibers include semi-synthetic fibers (acetate, triacetate, oxide acetate, promix, chlorinated rubber, hydrochloric acid rubber). Etc.), metal fibers, carbon fibers, glass fibers and the like. Also, polyolefins such as high density polyethylene, medium density polyethylene, low density polyethylene, polypropylene, etc., polyester, polyvinylidene chloride, starch, polyvinyl alcohol or polyvinyl acetate, single fibers such as copolymers or modified products thereof, or these A core-sheath composite fiber having a resin component in the sheath can be used. Of these, polyolefins and modified polyesters are preferably used because they have high adhesive strength between fibers, are easy to form a three-dimensional network structure by fusion of fibers, and have a melting point lower than the ignition point of pulp fibers. Synthetic fibers such as polyolefin having branches are also preferably used because of their good fixability with oxidizable metals and water retention agents. These fibers can be used alone or in combination of two or more. In addition, these fibers can be used in the form of collected and reused. Among these, wood pulp and cotton are preferably used in terms of the oxidizable metal, the fixability of the water retention agent, the flexibility of the resulting molded sheet, the oxygen permeability resulting from the presence of voids, the production cost, and the like. It is done.

  The fibrous material preferably has an average fiber length of 0.1 to 50 mm, more preferably 0.2 to 20 mm.

  The release agent is not limited, but includes lubricating oil composed of mineral oil, synthetic oil, animal and vegetable oil, etc., high viscosity lubricating oil such as grease, natural wax, synthetic wax, silicone oil, fluororesin, stearic acid And stearates and the like.

The functional substance may be any substance as long as it has some function such as medicinal effect and aroma. Perfumes, herbs, herbs, herbal medicines, transdermal drugs, pharmaceutically active substances, fragrances, lotions, emulsions, poultices, fungicides, antibacterial agents, bactericides, deodorants or deodorants, magnetic substances, etc. As an example.
Furthermore, as specific examples of functional substances, acidic mucopolysaccharides, chamomiles, horse chestnuts, vitamin E, nicotinic acid derivatives, blood circulation promoters such as alkaloid compounds; Swelling improvers such as vitamin P, goldfish, silanol, terminaria, mayus; aminophylline, tea extract, caffeine, xanthene derivative, inosit, dextran sulfate derivative, horse chestnut, escin, anthocyanidin, organic iodine compound, hardwood leather, horsetail, Slimming agents such as mannenrou, ginseng, hyaluronidase; analgesics such as indomethacin, dl-camphor, ketoprofen, shoga extract, red pepper extract, methyl salicylate, glycol salicylate; Chromatography, rosemary, citron, Jenipa, peppermint, eucalyptus, rosewood, include perfumes orange etc., it can be used one or more kinds.

  The percutaneously absorbable drug is not particularly limited as long as it is percutaneously absorbable. For example, skin stimulants, analgesic anti-inflammatory agents such as salicylic acid and indomethacin, central nervous system agents (sleep sedatives) , Antiepileptics, psychiatric agents), diuretics, antihypertensives, lotus vasodilators, antitussives, antihistamines, arrhythmic agents, cardiotonic agents, corticosteroids, local anesthetics, and the like. These drugs are used alone or in combination of two or more as required.

  Examples of the humectant include polyols such as glycerin, ceramides, and collagens. The moisturizing function of the moisturizing agent is enhanced by the synergistic effect of the moisturizing agent and heat, and moisture and tension can be given to the skin. Further, examples of the pap crack include anti-inflammatory agents such as indomethacin and methyl salicylate. These poultices also promote the percutaneous absorption due to a synergistic effect with heat, and can effectively improve muscle pain, joint pain, low back pain and the like.

  The method for producing a double-sided uneven heating element of the present invention is produced by laminating a heating composition molded body on a substrate, covering with a covering material, and sealing the peripheral edge of the heating composition molding.

The method for producing a double-sided uneven heating element using the moldable surplus water heating composition of the present invention comprises producing a heating composition molded body by a mold molding method such as a mold-through molding method or a casting molding method. It is manufactured by laminating on a material, covering with a covering material, and sealing the peripheral edge of the exothermic composition molded body.
Alternatively, a moldable surplus water exothermic composition having an easy water value of 14 to 50 is formed by a mold forming method, the exothermic composition molded body is laminated on the nonwoven fabric, and further covered with the nonwoven fabric, and pressed with a press roll, 30 It is produced by drying with hot air (nitrogen or air or the like) at ˜200 ° C., cutting and laminating the sheet on the substrate, covering with a covering material, and sealing the peripheral edge of the exothermic composition molded body.

The die-through molding method uses a punching die, molds a moldable excess water exothermic composition, laminates a punching exothermic composition molded body on a substrate, and generates a heat generating composition molded body. It is a method of manufacturing.
The punching die is a die having a through hole having a desired shape and thickness.
An example is a drum-shaped forming apparatus in which the through-hole is provided on the rotating surface of a hollow drum-shaped rotating body, or a strut conveyor-shaped forming apparatus using a strut-conveyor-shaped rotating body in which a plurality of struts having the through-hole are provided. As mentioned.
As a continuous manufacturing method, a rotary punching die is used, and a molding machine for laminating a die-shaped exothermic composition molded body on a long base material and covering it with a long covering material, Using the rotary sealer that can seal the peripheral part of the part to be separated and the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), the peripheral part of the exothermic composition molded body through the sealer As an example, a continuous forming method in which a necessary portion of the divided portion is heat sealed and sealed.

The cast molding method is a method for producing a heat generating composition molded body by filling a moldable excess water heat generating composition into a casting mold having a recess and laminating the molded heat generating composition molded body on a substrate. It is. The punching die is a die having a recess having a desired shape and thickness.
Examples thereof include an exothermic composition molded body manufacturing apparatus in which a concave portion is provided on the outer surface of a drum-shaped rotating body or a hollow drum-shaped rotating body.
As a continuous production method, by filling the concave portion with a drum-shaped rotating body and transferring it to the base material, a molding machine for laminating the exothermic composition molded body on the long base material and covering it with a long covering material, Using a rotary sealer that can seal the target section and the periphery of the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), An example is a continuous forming method in which necessary portions of the twill part and the divided part are heat sealed and sealed.

The exothermic composition molded body of the present invention generates heat upon contact with air (oxygen), can be laminated on a substrate, can maintain its shape, is covered with a covering material, and seals the peripheral portion of the exothermic composition molded body. There is no limit if you can,
1) Exothermic composition molded body obtained by molding a moldable excess water exothermic composition by molding,
2) Molding of a heat-generating composition containing a heat-generating composition (size 1), which is a sheet-like heating piece consisting of a heating sheet and a cut product thereof, and having a width of 1 mm or more and less than 25 mm, by molding. The size of the exothermic composition molded body is applied. Although there is no restriction | limiting in width, Preferably it is 1 mm-24.5 mm.
3) The width of the heat generating sheet is not limited, but preferably provided with a striped space (including slits) of 0.001 to 50 mm, and a heat generating sheet with holes that generates heat in contact with air (oxygen); Exothermic composition molded body 4) which is a cut product, the width of the sheet-like heating piece is not limited, but preferably air (0.001 to 50 mm striped space (including slits) provided, Examples thereof include a sheet-like heating piece with a hole that generates heat upon contact with (oxygen), and a heat-generating composition formed body that is a cut product thereof.
The size of the exothermic composition molded body of the above 3) and 4) may be determined according to the desired size of the double-sided uneven heating element.
The distance between the exothermic composition molded body space part and the space part in the above 3) and 4) applies the width of the same exothermic part. For the size of the other part, the size of the exothermic composition molded body obtained by molding the moldable excess water exothermic composition by molding is applied.
The notch provided in at least one end of the heating sheet and the sheet-like heating piece of 3) to 4) is not limited, and may be a linear shape such as a straight line or a two-dimensional shape such as a triangle. It may have.
The exothermic composition as a raw material of the exothermic composition molded body of the above 1) to 4) can use any component of the exothermic composition used in conventional warmers and exothermic bodies without particular limitation.

The heat generating sheet is not limited as long as it is a sheet-like material that generates heat upon contact with air (oxygen). Examples of the heat generating sheet include a dispersive heat generating sheet, a papermaking heat generating sheet, and a pressure processing heat generating sheet.
In the present invention, a heat-generating sheet with holes and / or a heat-generating piece can also be used as the heat-generating composition molded body.
The manufacturing method of each heating sheet and heating piece of the present invention described above is a process such as cutting, slitting, punching, punching / cutting, etc. of the material heating sheet and a small width (the width is not limited, but preferably 1 mm to 30 mm, More preferably, the width is 1 mm to 25 mm, and more preferably the width is 1 mm to 24.5 mm. The manufacturing method of a raw material sheet can use a well-known manufacturing method. For example, WO96 / 11654, JP-A-2003-102761, WO00 / 13626, and the like can be cited as examples. Moreover, there is no restriction | limiting in the installation method of a space part (a slit containing), A well-known method can be used, Mechanical cutting methods, such as a guillotine cutter and a cut roll, and the cutting method by a laser (laser) are mentioned as an example.

  The dispersion type heat generating sheet is not limited as long as the heat generating composition is dispersed and held in a non-woven fabric or other porosity packaging material and processed into a sheet-like heating element. This is a heat generating sheet that generates heat when it is brought into contact with air (oxygen) by adding a reaction accelerator aqueous solution such as an electrolyte after dispersing a powder raw material heat generating composition containing carbonaceous metal powder carbon component and water retention agent as essential components in a nonwoven fabric. .

  The papermaking exothermic sheet is not limited as long as the exothermic composition is processed into a sheet-like heating element by the papermaking method, but is not limited to oxidizable metal powder such as iron powder, carbon component, water retention agent, fibrous material And a paper sheet produced by papermaking a slurry-like raw material exothermic composition containing water as an essential component is dried with hot air at 90 to 200 ° C., added with a reaction accelerator such as an electrolyte or an aqueous solution thereof, and contacted with air (oxygen) An example is the one under the heat generating sheet that generates heat.

The pressure-processable heat generating sheet is not limited as long as the heat-generating composition is processed into a sheet-like heat generating element by a pressure processing method, but examples thereof include the following 1) and 2).
1) To a mixture of an exothermic composition containing an oxidizable metal powder such as iron powder, a carbon component, a reaction accelerator and water as essential components, and a second polymer other than the water absorbent polymer and / or the water absorbent polymer, A heat generating sheet obtained by integrating a heat generating composition to which any of alcohol, a crosslinking agent or a plasticizer is added with a predetermined pressure.
As the exothermic composition, components of the moldable excess water exothermic composition can be used.
As the alcohol, monohydric or polyhydric liquid alcohol is preferably used. For example, ethanol, propylene glycol, glycerin and the like are preferable.
The cross-linking agent causes cross-linking between the water-absorbing polymer, cross-linking between the second polymer, and cross-linking between the water-absorbing polymer and the second polymer, and causes a cross-linking reaction between these polymers. In addition, among those that themselves interpose between these polymers to cause crosslinking, a crosslinking agent that promotes at least one crosslinking is preferable. Examples include ethylene glycol diglycidyl ether and methylene bisacrylamide.
2) An oxidizable metal powder such as iron powder, a carbon component, a reaction accelerator and water are essential components, and the molding assistant contains 1 to 15% by weight, preferably 3 to 15% by weight, based on the total amount. An exothermic sheet obtained by integrating a hydrous exothermic composition having an easy water value of less than 0.01 by applying a predetermined pressure. It should be noted that the components of the heat-dissipating composition for disposable warmers and heating elements, such as water-absorbing polymers, water retention agents such as wood powder, hydrogen generation inhibitors such as sodium sulfite, pH regulators such as slaked lime, etc., are appropriately selected Can be used.
When a pressure-processed heat generating sheet is made into a sheet by the pressure processing method, a heat-generating sheet, a sheet-shaped heating piece, or a holed mold is used depending on the size of the mold hole. A piece can be manufactured.
Here, the pressure processing method is not limited as long as it is a method in which a heat generating composition is placed in a mold and pressed in the mold, and the heat generating composition is compressed and molded. Place in a cylindrical mold and press to mold. The pressure and pressurization time are not limited as long as they can be molded, but the pressure is preferably 100 to 9000 kg / cm ² , and the time is preferably 0.01 to 30 seconds.
2) The exothermic composition is rolled at a predetermined pressure using a roller to obtain a sheet-like heating element.
3) The exothermic composition is put into a mold hole having a recess or a through hole having a desired shape, a deformable flexible roll such as a balloon or a rubber roll, or a roll having a protrusion that can be inserted into the mold hole. The exothermic composition in the mold cavity is pressurized by a pressing means such as a belt, and the exothermic composition is compressed and molded.
Moreover, you may heat-process the produced heat generating body. The heat treatment conditions in this case are not limited, but are preferably 50 to 250 ° C. and about 1 to 20 minutes.

Exothermic composition molded body formed from moldable excess water exothermic composition by molding, and exothermic composition molded body composed of sheet-like heating piece, hole-like heating sheet, hole-like sheet-like heating piece, Also included are those in which the corners of the composition molded body are arc-shaped (with rounded edges).
Dispersion-type heating sheets, dispersion-type sheet heating pieces, paper-making-type heating sheets, paper-making-type sheet-like heating pieces, pressure-processing-type heating sheets, pressure-processing-type sheet-like heating pieces are heating sheets, sheet-like heating pieces, and nonwoven The laminated body which laminated | stacked combining arbitrary packaging materials etc. is also included.

The size and shape of the sheet-shaped heating piece are not limited, but are preferably as follows.
The shape is preferably a rectangle or a rectangle-like shape.
The width is preferably 1 mm or more and less than 25 mm, more preferably 1 mm to 24.9 mm, still more preferably 1 to 24 mm, more preferably 1 mm to 23 mm, still more preferably 1 mm to 23 mm. Yes, more preferably 1 mm to 20 mm, still more preferably 3 mm to 20 mm, still more preferably 5 mm to 15 mm, and even more preferably 5 mm to 10 mm.
The length is preferably 5 to 300 mm, more preferably 5 mm to 200 mm, still more preferably 5 mm to 100 mm, more preferably 20 mm to 150 mm, and still more preferably 30 mm to 100 mm.
The ratio of (length / width) is preferably 2.0 to 60, more preferably 2.1 to 60, more preferably 2.1 to 50, and further preferably 2.1 to 40. More preferably, it is 2.1-30, More preferably, it is 2.5-25, More preferably, it is 2.5-20, More preferably, it is 3-20.
The height is 0.5 mm or more and less than 10 mm, more preferably 1 mm to 10 mm, and further preferably 2 mm to 10 mm.

  The size of the heat generating sheet with holes may be determined according to the size of the double-sided uneven heating element.

  The width of the space (including the slit) is not limited as long as flexibility can be secured, but is preferably 0.001 mm to 50 mm, preferably 0.01 mm to 50 mm, and more preferably 0.1 mm to 50 mm. More preferably, it is 0.3 mm-50 mm, More preferably, it is 0.3 mm-50 mm, More preferably, it is 0.3 mm-40 mm, More preferably, it is 0.5 mm-30 mm, More preferably, it is 1 mm- It is 30 mm, More preferably, it is 1 mm-20 mm, More preferably, it is 3 mm-10 mm.

  The width of the section is not limited as long as flexibility can be secured, but is preferably 0.1 mm to 50 mm, preferably 0.3 mm to 50 mm, more preferably 0.3 mm to 50 mm, and still more preferably. It is 0.3 mm-40 mm, More preferably, it is 0.5 mm-30 mm, More preferably, it is 1 mm-30 mm, More preferably, it is 1 mm-20 mm, More preferably, it is 3 mm-10 mm.

  The width of the space (including the slit) is not limited as long as flexibility can be secured, but is preferably 0.001 mm to 50 mm, preferably 0.01 mm to 50 mm, and more preferably 0.1 mm to 50 mm. More preferably, it is 0.3 mm to 50 mm, More preferably, it is 0.3 mm to 40 mm, More preferably, it is 0.5 mm to 30 mm, More preferably, it is 1 mm to 30 mm, More preferably, it is 1 mm to 20 mm And more preferably 3 mm to 10 mm.

  Here, the total area of the heat generating regions other than the space is not limited, but preferably, the total area of the divided heat generating portions is 50 to 85% with respect to the entire surface of the heat generating surface of the heating element, and more preferably. 50-70%. In such a range, heat storage is suppressed and redness, medical treatment, etc. can be more effectively prevented.

  In order to have a number of partial acupoint stimulating elements and to expect a comfortable thermotherapy, the width of the section is preferably 3.5 to 10 mm, and the width of the section heating section and the section (air) The width ratio of the layer portion is preferably 1: 1 to 3: 1.

  In particular, in the case of a double-sided uneven heating element provided with a pressure-sensitive adhesive layer on a section heating section, the ratio of the width of the section heating section to the section section (air layer section) is preferably in the range of 1: 1 to 3: 1. As a result, the same thermal effect as in the case of the entire single heat generating portion can be obtained, and the wearability is sufficient, and redness and the like can be more effectively prevented. That is, when this ratio is 1: 1 or more, the adhesive force / thermal effect is improved. Moreover, by setting it as 3: 1 or less, as a result of suppressing heat storage and further improving the effect of preventing redness and the like, and suppressing the retention of sweat, it is possible to more effectively prevent stuffiness and peeling of the sheet.

An example of the distributed heat generating sheet will be described.
1) The non-woven fabric (b) is superimposed on the lower surface of the non-woven fabric (a) having a large number of voids, the exothermic composition powder and the hot melt adhesive powder are sprayed on the upper surface of the non-woven fabric (a), and the non-woven fabric ( c), a sheet-like heating element formed by heating and compressing with a heating compressor and then impregnated with water or an aqueous inorganic electrolyte solution, and the sheet-like heating element is desired. A three-layer nonwoven fabric dispersive exothermic sheet that is cut into a size of
2) After adhering water to the lower surface of the nonwoven fabric having a large number of voids, the powder of the heat generating composition is spread and held on the upper surface of the nonwoven fabric, and another nonwoven fabric having a large number of voids is superimposed on the upper surface of the nonwoven fabric. An example is a two-layer nonwoven fabric-dispersed exothermic sheet that has been compressed and then sprayed with water or an aqueous electrolyte solution or cut into a desired size.

The three-layer nonwoven fabric dispersed heat generating sheet will be described.
The three-layer nonwoven fabric heating sheet of the distributed heating sheet is
1) The nonwoven fabric (b) is superimposed on the lower surface of the nonwoven fabric (a) having a large number of voids, the nonwoven fabric (c) is superimposed on the upper surface of the nonwoven fabric (a), and in the voids of the nonwoven fabric (a) and the nonwoven fabric (c); The exothermic composition powder and the hot melt adhesive powder are held between the nonwoven fabric (a) and the nonwoven fabric (c),
A heating sheet formed by adhering the nonwoven fabric (a) and the nonwoven fabric (c) by heat compression of a heating compressor and impregnating with water or an inorganic electrolyte aqueous solution
2) The exothermic composition powder and the hot melt adhesive powder are held in the gap between the nonwoven fabric (a) and the nonwoven fabric (c) and between the laminated layers of the nonwoven fabric (a) and the nonwoven fabric (c). A non-woven fabric (a) and a non-woven fabric (c) are bonded by heat compression, a heat generating sheet impregnated with water or an aqueous inorganic electrolyte solution, and a plurality of non-woven fabrics having a large number of voids are stacked. The exothermic composition powder and the hot melt adhesive powder are held, and heat generated by being impregnated with water or an inorganic electrolyte aqueous solution is adhered to at least one surface of the non-woven fabric in contact with the non-woven fabric of the single layer by heat compression of a heating compressor. An example is a sheet.
Hot melt adhesive powders are ionomers, ethylene-vinyl acetate copolymers, homopolymers of thermoplastic resins such as polyethylene and polypropylene, polymer blends of these thermoplastic resins, and hot resins based on these thermoplastic resins. It is preferably at least one resin powder selected from the group consisting of melts.
The softening point of the hot melt adhesive powder is preferably 40 to 200 ° C.
It is preferable that the addition amount of the hot melt adhesive powder is 0.1 to 20.0 parts by weight with respect to 100 parts by weight of the oxidizable metal powder.
The particle size of the hot melt adhesive powder is not limited, but is preferably 0.2 to 2 mm in diameter.
It is preferable that the heating compressor has an emboss on at least one compression surface.
It is preferable that the nonwoven fabric (a), the nonwoven fabric (b), and the nonwoven fabric (c) are mainly composed of at least one selected from the group consisting of pulp, cotton, hemp, rayon, and acetate.

  The nonwoven fabric is a nonwoven fabric having a large number of voids, and among the exothermic composition raw materials that generate heat upon contact with air, a mixture of those used in powder (hereinafter referred to as exothermic composition powder) is placed in the voids. A well-known non-woven fabric can be used as well as having high water retention and flexibility. It is preferable to have the uneven surface comprised by the embossed surface of the compression roll in the compression surface of a nonwoven fabric. The exothermic composition powder contains iron powder and a carbon component as essential components, and may contain at least one component of the moldable excess water exothermic composition.

The two-layer nonwoven fabric dispersed heat generating sheet will be described.
1) The two-layer nonwoven fabric-dispersed heat-generating sheet has a plurality of voids, a first nonwoven fabric having water attached to the lower surface, and heat generated by being dispersed from the upper surface of the nonwoven fabric and retained in the voids inside the nonwoven fabric. A sheet-like product comprising a composition powder and a second nonwoven fabric superimposed on the upper surface of the first nonwoven fabric, the nonwoven fabric being further compressed by a mold compressor, It is a heat generating sheet in which a product is impregnated with water or an aqueous inorganic electrolyte solution.
2) The two-layer nonwoven fabric-dispersed exothermic sheet has a structure in which a plurality of non-woven fabrics are superposed on each other by water adhesion force or water adhesion force and compression force, and the exothermic composition is held in at least one non-woven fabric void. 1 has a non-woven fabric mainly composed of fibers selected from pulp, cotton, hemp, rayon, a porosity of 60 to 99.5%, a thickness of 0.5 to 25 mm, and a basis weight of 5 to 200 g / m ² . It is preferable.
3) After allowing water to adhere to the lower surface of the first nonwoven fabric having a plurality of voids, the exothermic composition powder is sprayed on the upper surface and held in the voids, and then the second nonwoven fabric is applied to the upper surface of the first nonwoven fabric. As an example, a heat generating sheet obtained by impregnating water or an inorganic electrolyte aqueous solution into a sheet-like material formed by superimposing non-woven fabrics and compressing with a mold compressor may be mentioned.
It is preferable that the second nonwoven fabric is mainly composed of fibers selected from pulp, cotton, hemp, and rayon and has a basis weight of 5 to 150 g / m ² .
It is preferable that the amount of water to be adhered is 10 to 200 g / m ² .
It is preferable to have the uneven surface comprised by the embossed surface of the compression roll in the compression surface of a nonwoven fabric.

  As a method for producing the two-layer nonwoven fabric dispersed heat generating sheet, a known production method can be used. It is preferable to have the uneven surface comprised by the embossed surface of the compression roll in the compression surface of a nonwoven fabric.

  The components of the exothermic composition can be used in the dispersion type exothermic sheet, the papermaking type exothermic sheet, and the pressure compression type exothermic sheet.

  The hot-melt adhesive powder is the same as the three-layer nonwoven fabric-dispersed heat generating sheet.

An example of the papermaking heat generating sheet will be described.
The papermaking type heat generating sheet is made by making an intermediate formed body from a raw material composition containing at least iron powder, a carbon component, a fibrous material, and water in a papermaking process, and then heating and drying the intermediate formed body at 60 to 300 ° C. A heat generating sheet in which an electrolyte is added to and contained (impregnated) in the intermediate formed body by coating or spraying is preferable.
The heat generating sheet is a heat generating composition molded body that generates heat upon contact with air (oxygen).
The raw material composition is at least iron powder, carbon component, reaction accelerator (inorganic electrolyte), thermoplastic fiber, and water, and the raw material composition is paper-made. After heating and drying, a reaction accelerator (inorganic electrolyte) is added to and contained (impregnated) in the intermediate molded body by spray coating or spraying, and the thermoplastic fiber has a network structure fused therein. It is good also as a molding which has the exothermic heat which is.
The papermaking heat generating sheet preferably contains 50% by weight or more of components other than the fibrous material such as iron powder, carbon component, and fibrous material.
Furthermore, the raw material composition may contain at least one component of the moldable excess water exothermic composition.

The blending amount of the oxidizable metal such as iron powder in the component excluding the electrolyte from the papermaking heat generating sheet is preferably 10 to 95% by weight.
A flocculant may be added to the papermaking heat generating sheet.
Further, for paper-making type heat generating sheets, it is usually used for paper making of sizing agents, coloring agents, paper strength enhancers, yield improvers, fillers, thickeners, pH control agents, bulking agents and the like as necessary. Additives can be added without particular limitation. The addition amount of the additive can be appropriately set according to the additive to be added.
The density of the papermaking exothermic sheet is 0.6-3. Og / cm ³ is preferred.
The papermaking exothermic sheet preferably has a moisture content (weight moisture content, the same applies hereinafter) of 10 to 80%.

It is preferable to add the aggregating agent to the raw material composition of the papermaking type heat generating sheet.
Examples of the flocculant include inorganic flocculants composed of metal salts such as sulfate bands and polyaluminum chloride; clay minerals such as bentonite; silicon dioxide such as colloidal silica or hydrates thereof; hydrous magnesium silicate such as talc; An auxiliary agent etc. are mentioned. Besides these combinations, these flocculants can be used alone or in combination of two or more.
The addition amount of the flocculant is preferably 0.01 to 5% by weight with respect to the solid content of the raw material composition.

  The concentration of the raw material composition is preferably 0.05 to 10% by weight, and more preferably 0.1 to 2% by weight.

  Next, a known papermaking method such as a short net papermaking machine can be used as a papermaking method for forming the papermaking sheet by papermaking the raw material composition.

  The papermaking sheet can be dehydrated until the moisture content (weight moisture content, the same applies hereinafter) is 70% or less from the viewpoint of maintaining the form after papermaking (shape retention) and maintaining the mechanical strength. Preferably, it is more preferable to dehydrate to 60% or less.

  The papermaking sheet is preferably dried by heat drying. In this case, the heat drying temperature is preferably 60 to 300 ° C, more preferably 80 to 250 ° C.

  The moisture content of the paper sheet after drying is preferably 20% or less, and more preferably 10% or less. When the water content is 20% or less, excellent long-term storage stability is obtained. For example, even when temporarily stored in a wound roll state, moisture does not easily move in the thickness direction of the roll. It is excellent in that it can supply a uniform product in terms of mechanical strength.

  After the electrolyte is contained in the papermaking sheet as described above, the water content can be adjusted and stabilized as necessary to obtain a papermaking exothermic sheet. If necessary, the paper-making heat generating sheet or paper-making sheet can be processed into a predetermined size by performing processes such as trimming and laminating two or more sheets.

An example of the pressure processing type heat generating sheet will be described.
The pressure-processable exothermic sheet is a mixture of an exothermic composition containing iron powder, a carbon component, a reaction accelerator and water as essential components, and a water-absorbing polymer and / or a second polymer other than the water-absorbing polymer. A heat generating sheet obtained by integrating a heat generating composition added with either a crosslinking agent or a plasticizer by applying a predetermined pressure is preferable.
As the exothermic composition, components of the moldable excess water exothermic composition can be used.
As the alcohol, monohydric or polyhydric liquid alcohol is preferably used. For example, ethanol, propylene glycol, glycerin and the like are preferable.
The cross-linking agent causes cross-linking between the water-absorbing polymer, cross-linking between the second polymer, and cross-linking between the water-absorbing polymer and the second polymer, and causes a cross-linking reaction between these polymers. In addition, among those that themselves interpose between these polymers to cause crosslinking, a crosslinking agent that promotes at least one crosslinking is preferable. Examples include ethylene glycol diglycidyl ether and methylene bisacrylamide.

  The exothermic composition molded body made from the heat-generating sheet with holes of the present invention or a cut product thereof will be described.

The heat generating sheet with holes provided in the heat generating sheet such as the distributed heat generating sheet, the papermaking heat generating sheet, and the pressure processing type heat generating sheet has a hole in which a plurality of striped space portions are provided in the heat generating sheet. There are no restrictions on the length, width, height, and (length / width) ratio of the segmented heat generating portion, which is an attached heat generating sheet and is an area between the space portions, but the length is preferably 5 mm. ~ 200 mm, width is preferably 1 mm or more and less than 25 mm, height is preferably 0.5 mm to 10 mm, ratio of (length / width) is preferably 2.1 to 60, and space width is limited However, it is preferably 1 to 30 mm, and the plurality of divided heat generating portions are separated from each other, and are formed in a stripe shape in at least one direction by a stripe-shaped space portion, and are easily bent in one direction. Ri may directing the inexpensiveness, having only one direction easily bent structure than in another direction.
Further, as another example of the heat generating sheet with holes, as an example, a heat generating sheet with holes in which the stripe-like space of the heat generating sheet with holes has a notch at least at one end of the heat generating sheet with holes on the extension line of the stripe. Can be mentioned.
The exothermic composition molded body is laminated on a substrate, covered with a covering material, and the peripheral edge and / or space of the exothermic composition molded body is heat-sealed to form a double-sided uneven heating element.

The exothermic composition molded body, the perforated sheet-shaped exothermic piece (perforated exothermic sheet), the exothermic piece, and the exothermic composition molded body made of a cut product thereof will be described.
The heating piece is a small width heating sheet having a width of 1 mm to 30 mm.
The perforated sheet-like heating piece is a perforated sheet-like heating piece in which a striped space is provided in a sheet-like heating piece such as the distributed sheet-like heating piece, the paper-making sheet-like heating piece, and the pressure-processing type heating sheet piece. It is a heat-generating composition molded body that is a heat-generating piece or a cut product thereof.
The length, width, height, and (length / width) ratio of the divided heat generating portion, which is a region between the space portions, are not limited, but the length is preferably 5 mm to 200 mm, and the width is preferable. Is 1 mm or more and less than 25 mm, the height is preferably 0.5 mm to 10 mm, the ratio of (length / width) is preferably 2.1 to 60, and the width of the space is not limited, 1 to 30 mm, each of the plurality of divided heat generating portions is separated from each other, and is formed in a stripe shape in at least one direction by a stripe-shaped space portion, and is easy to bend in one direction. It has a structure in which only one direction can bend more easily than the direction.
The exothermic composition molded body is laminated on a substrate, covered with a covering material, and the peripheral edge and / or space of the exothermic composition molded body is heat-sealed to form a double-sided uneven heating element.

The method for producing a double-sided uneven heating element according to the present invention comprises laminating a heating composition molded body on a substrate, covering with a covering material, and sealing the peripheral edge of the heating composition molded body. It is a manufacturing method.
In addition to the method for producing a double-sided uneven heating element using the moldable excess water heating composition,
1. A sheet-like heating piece such as the dispersion-type sheet-like heating piece and the paper-making sheet-like heating piece is used as a heating assembly molded body, the heating composition molding is laminated on a base material, and a covering material is covered, and a heating composition is formed. A method for producing a double-sided uneven heating element by sealing the peripheral edge of a molded article,
2. A heating sheet with holes having a stripe-shaped space is used as a heating assembly molded body, the heating composition molded body is laminated on a substrate, covered with a covering material, and a peripheral portion of the heating composition molded body is sealed. A method of producing a double-sided uneven heating element by
3. A sheet-like heating piece with a hole provided with a stripe-like space is used as a heating assembly molded body, the heating composition molding is laminated on a base material, covered with a covering material, and a peripheral portion of the heating composition molding is sealed. As an example, a method for producing a double-sided uneven heating element by doing so is given.
In addition, the above 1.2.3. In the method for producing a double-sided uneven heating element, the exothermic composition molded body may be laminated and fixed on a substrate through a fixing layer made of an adhesive, an adhesive or the like.

The easy water value is a value indicating the amount of surplus water that can move out of the exothermic composition in the water present in the exothermic composition. This easy water value will be described.
Under normal temperature and normal pressure, 8 lines are written at intervals of 45 degrees radially from the center point. 2 (JIS P 3801 type 2) filter paper is placed on a stainless steel plate, and a template of length 150 mm × width 100 mm having a hollow cylindrical hole with an inner diameter of 20 mm × height of 8 mm is placed at the center of the filter paper, Place the sample near the hollow cylindrical hole, move the push plate along the mold plate, put the sample into the hollow cylindrical hole while pushing the sample, and scrape the sample along the mold plate surface (mold push molding) ).
Next, in order to prevent an exothermic reaction during the measurement, a non-water-absorbing 70 μm polyethylene film is placed so as to cover the hole, and further, a thickness of 5 mm × length of 150 mm × width of 150 mm is placed thereon. Place a stainless steel plate and hold for 5 minutes. Thereafter, the filter paper is taken out, and the trace of water or aqueous solution soaking is read in millimeters as the distance from the circumference that is the edge of the hole of the hollow cylinder to the tip of the soaking, along the radial line. Similarly, the distance is read from each line to obtain a total of eight values. Each of the eight values read (a, b, c, d, e, f, g, h) is taken as a measured moisture value. The arithmetic average of the eight measured moisture values is taken as the moisture value (mm) of the sample. In addition, the water content for measuring the true water value is the blended water content of the exothermic composition or the like corresponding to the weight of the exothermic composition or the like having an inner diameter of 20 mm × height of 8 mm, and only water corresponding to the water content is used. Measured in the same manner, and calculated in the same manner as the true water value (mm). The value obtained by dividing the moisture value by the true moisture value and multiplying by 100 is the easy water value. That is,
Easy water value = [moisture value (mm) / true water value (mm)] × 100
Five points are measured for the same sample, the five ready water values are averaged, and the average value is taken as the ready water value of the sample. In addition, when measuring the mobile water value of the exothermic composition in the heating element, the moisture content for measuring the true moisture value is calculated by calculating the moisture content of the exothermic composition from the moisture content measurement using an infrared moisture meter of the exothermic composition. Based on this, the amount of water necessary for the measurement is calculated, and the true water value is measured and calculated from the amount of water.
In addition, the exothermic composition having an easily movable water value of 0.01 to 13.5 is provided with a non-water-absorbing 70 μm polyethylene film so as to cover the hole, and further, a thickness of 5 mm × a length of 150 mm × If a windshield is placed instead of a stainless steel flat plate having a width of 150 mm, the exothermic composition of the present invention undergoes an exothermic reaction during measurement, making measurement impossible.

The degree of molding refers to the shape of the exothermic composition molded body, which is a molded body of the exothermic composition in the shape of the punched hole by mold-through molding using a punching die having a punched hole, after being separated from the mold. Maintain the peripheral part of the exothermic composition molded body without the collapsed pieces of the exothermic composition molded body having a maximum length exceeding 800 μm, and depending on the number of collapsed pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. The moldability of the exothermic composition is quantified.
1) As a measuring device,
On the upper side of the endless belt that can run, a stainless steel mold (in the center, four corners of length 60mm x width 40mm are rounded to 5 are r (substantially arc shape), and the upper part of the punched hole (inlet of exothermic composition) The corners of the four sides of this are provided with 1 radius r (substantially arc shape), and the corners of the four sides of the lower part of the punch hole (exit of the exothermic composition molded body) are provided with 3 radius r (substantially arc shape). A plate with a thickness of 2 mm × length 200 mm × width 200 mm, which has a hole and a smooth surface on the outer surface of the mold and each wall of the punch hole, and a fixed scraping plate are arranged, and is endless on the opposite side A magnet (thickness 12.5 mm × length 24 mm × width 24 mm, two magnets in parallel) is arranged on the lower side of the belt. The smooth surface is not limited as long as it is smooth, but the surface roughness Ra is preferably 10 μm or less, more preferably 4 μm or less, and even more preferably 2 μm or less.
The magnet covers an area larger than the area (40 mm) of the maximum cross section with respect to the direction of travel of the punching hole of the mold, and the area in the vicinity thereof.
2) As a measurement method,
A stainless steel plate having a thickness of 1 mm × length of 200 mm × width of 200 mm is placed on an endless belt of the measuring device, a polyethylene film of thickness of 70 μm × length of 200 mm × width of 200 mm is placed thereon, and a stainless steel mold is further formed thereon. Put.
Then, after fixing the scraping plate at a position of 50 mm from the advancing side end of the endless belt of the punching hole of the mold, 50 g of the exothermic composition is placed near the scraping plate between the scraping plate and the punching hole, The belt is moved at 1.8 m / min to fill the punching hole of the mold while scraping off the heat generating composition. After the mold has completely passed through the scraping plate, the running of the endless belt is stopped.
Next, a stainless steel mold / exothermic composition molded body / polyethylene film / stainless steel plate is set in the molding degree measuring apparatus. The mold holding means is set on the lower side of the stainless steel mold, the jack is lowered by 100 mm at a speed of 600 mm / mim, and the exothermic composition / polyethylene film / stainless plate is removed from the stainless steel mold. The stainless steel mold is gently removed from the mold holding means, and the exothermic composition molded body laminated on the polyethylene film 24 from the exothermic composition molded body / polyethylene film / stainless plate is observed, and the degree of molding is measured.
3) As a judgment method,
On the condition that there is no collapsed piece of the exothermic composition molded body having a maximum length exceeding 800 μm at the peripheral portion of the exothermic composition molded body, a forming degree of 1 means a exothermic composition having a maximum length of 300 μm to 800 μm. There are 9 or more pieces of the molded body. A moldability of 2 means that there are eight pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. When the degree of molding is 3, there are seven pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. A forming degree of 4 means that there are six pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. A molding degree of 5 means that there are five pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. A forming degree of 6 means that there are four pieces of collapsed pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. A moldability of 7 means that there are three pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. A forming degree of 8 means that there are two pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. A forming degree of 9 means that there is one broken piece of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. A forming degree of 10 means that there are 0 pieces of collapsed pieces of the exothermic composition molded body having a maximum length of 300 μm to 800 μm. The molding degree is preferably 7 or more, more preferably 8 or more, still more preferably 9 or more, and still more preferably 10. The forming degree is 5 or more. If the molding degree is 5 or more, a seal that can withstand practical use is provided at the peripheral edge of the exothermic composition molded body sandwiched between the base material and the covering material after molding. In the case of the exothermic composition having a forming degree equal to or higher than the standard, the exothermic composition molded body can be prepared by a mold forming method such as die-through molding or cast molding.
If there is a molding degree exceeding the standard, the exothermic composition molded body is covered with at least the covering material, and the shape is maintained until the seal portion is formed between the base material and the covering material. Sealing can be performed at the portion, and so-called sesame, which is a broken piece of the exothermic composition, is not scattered at the sealing portion. The presence of sesame causes poor sealing.
In the present invention pursuing high moldability, the exothermic composition is assumed to have moldability when the degree of molding is 7 or more.
This is an essential property for the exothermic composition used in the molding method. Without this, it is impossible to manufacture a heating element by a molding method.

  Moreover, the perforation of the division part of a heat generating body contains what was cut | disconnected intermittently in order to improve the bendability of a division part, and what was cut | disconnected intermittently so that hand cutting was possible. This perforation may be provided in all the division parts, or may be provided partially.

In the present invention, the bending resistance indicates rigidity (harness, stiffness) or flexibility, and conforms to the JIS L 1096A method (45 ° cantilever method) except that the heating element itself is used as a sample. Is. That is, one side of the heating element is placed on the scale base line on a smooth horizontal base having a slope of 45 ° (degrees) at one end. Next, the heating element is slid gently in the direction of the slope by an appropriate method, and when the central point of one end of the heating element contacts the slope, the position of the other end is read on the scale. The bending resistance is indicated by the length (mm) that the heating element has moved. Each of the five heating elements is measured and an average value is obtained.
However, the heat generating part containing the heat generating composition of the heat generating element must have a moving direction distance of 5 mm or more and a distance in the direction perpendicular to the moving direction of 20 mm or more on the horizontal table. In addition, the length of the heating element placed on the horizontal table is such that it crosses the region where the exothermic composition exists or the region where the exothermic composition exists and the region where it does not exist. Crossing.
1) Measurement calculation method of bending resistance of heating element having pressure-sensitive adhesive layer (1) The surface of the heating element that does not have the pressure-sensitive adhesive layer is placed on a horizontal table and measured.
(2) When the side of the heating element having the pressure-sensitive adhesive layer corresponds to the side of the horizontal base, a separator is attached to the pressure-sensitive adhesive layer, and the surface of the pressure-sensitive adhesive layer with the separator is placed on the horizontal base and measured.
(3) The separator covering the pressure-sensitive adhesive layer of the heating element with the pressure-sensitive adhesive layer is a plastic film having a bending resistance of 30 mm or less, a plastic film having a thickness of 50 μm or less, preferably 25 μm or less, or a lightly wrinkled wrinkle. Use a soft, soft film such as a plastic film.
2) Measurement calculation method of minimum bending resistance.
With respect to one heating element, one surface is placed on a horizontal table, and the bending resistance in each direction is obtained by the average value in the vertical direction and the horizontal direction, or in one direction and the direction perpendicular thereto.
Another surface is placed on a horizontal table and measured in the same manner to obtain each bending resistance.
The smallest bending resistance of each value is defined as the minimum bending resistance.
3) As for the bending resistance of the packaging material such as the base material and the covering material, a short 100 mm × longitudinal 200 mm test piece is prepared, and the bending resistance in the longitudinal direction (200 mm direction) is adopted.

The change in the minimum bending resistance of the heating element or heating part in the present invention means that the minimum bending resistance, which is the smallest value among the bending resistances of the heating element or heating part, is the value before and after the heating element is heated. The change in value that occurs at.
The change in the minimum bending resistance is calculated by the following equation.
Change in minimum bending resistance (%) = | ((A−B) / A) × 100 |
A: The minimum bending resistance of the heating element before heat generation B: The minimum bending resistance of the heating element after heat generation 1) The obtained heating element is left in air at 20 ° C. without wind, When the temperature of the heating element is lower than 25 ° C., the end of use is defined as the end of use, and the bending resistance of the heating element in the direction indicating the minimum bending resistance of the heating element before heating is indicated. Measure and use as the minimum bending resistance of the heating element after the end of heat generation.
2) The measurement direction of the minimum bending resistance of the heating element before heat generation and the measurement direction of the minimum bending resistance of the heating element after completion of heating are the same measurement direction.
3) Ignore heat generation during the measurement of bending resistance of the heating element before heat generation.

The minimum bending resistance of the heating element or heating part in the present invention is the minimum bending resistance of the heating element or heating part and the bending resistance ratio with respect to the total length in the direction, and is calculated by the following equation.
Minimum bending resistance = (A / B) × 100
A: Minimum bending resistance of heating element or heating part B: Total length of heating element or heating part in the direction showing the minimum bending resistance

In the present invention, the minimum orthogonal bending resistance of the heating element or heating part is the ratio of the bending resistance in the direction perpendicular to the direction indicating the minimum bending resistance of the heating element or heating part and the bending resistance to the total length in that direction. Yes, calculated by the following formula.
Minimum orthogonal bending resistance = (C / D) × 100
C: Stiffness in a direction perpendicular to the direction showing the minimum bending resistance of the heating element or heating part D: Total length of the heating element or the heating part in a direction perpendicular to the direction showing the minimum bending resistance of the heating element or the heating part When the minimum orthogonal bending resistance ratio exceeds 80, the minimum orthogonal bending resistance ratio is set to 100.

The minimum bending resistance ratio in the present invention refers to the minimum bending resistance ratio in the surface orthogonal to the thickness direction of the heating element or heating portion, and the minimum bending rigidity ratio in the direction orthogonal to the minimum bending resistance ratio. It is the ratio of the minimum bending resistance to the degree, and is calculated from the following equation.
Minimum bending resistance ratio = (F / G) × 100
F: Minimum bending resistance ratio G: Minimum orthogonal bending resistance ratio

  When obtaining any change in stiffness, stiffness rate, stiffness rate ratio, or orthogonal stiffness rate, change in minimum stiffness, minimum stiffness rate, minimum stiffness rate ratio, minimum orthogonal stiffness rate In the description of each item, the “minimum” character may be removed.

In the case of a heating element having segmented heat generating portions provided in a striped manner in the present invention, a parallel hexahedron-shaped segmented heat generating portion in which the absolute value of the difference in bending resistance in two directions that are perpendicular to each other is maximized. A heating element provided with streaks spaced apart, a heating element provided with a pressure-sensitive adhesive layer, and a heating element provided with the adhesive layers spaced apart in a streak form are very Since it is flexible and rigid in one direction, it has the effect of relieving symptoms such as stiff shoulders, back pain, and muscle fatigue, and particularly relieving symptoms of menstrual pain. Furthermore, it can be wound in the width direction of the heating element with a size of almost the width dimension, is compact, and is convenient for storage. In the case with a separator, the separator can be wound by using a separator having low bending resistance.
When a heating element is provided along the body, the body has many secondary curved surfaces, and the shoulders, legs, abdomen, waist, arms, etc. are almost linear in one direction, and the other two directions are Made almost from a curved surface. Therefore, the heating element of the present invention, which can form a curved surface in one direction, and can form a curved surface in the other two directions, can form a two-dimensional curved surface. Ideal for alleviating and treating symptoms.

The heating element may be stored in an outer bag, which is a non-breathable storage bag, and stored and transported. As long as the outer bag is non-breathable, the outer bag is not limited and may be laminated.
The non-breathable packaging material can be used as the packaging material of the outer bag. As an example, the manufactured heating element is interposed between two non-breathable films or sheets, and at the same time as or after this intervention, the two films or sheets are more than the heating elements. An example is a heating element in which the two films or sheets are sealed in a peripheral part exceeding the size of the heating element at the same time after punching or after punching.

  In the method of using the double-sided uneven heating element of the present invention, the segment heating part having a heating composition that generates heat upon contact with oxygen in the air is provided at intervals with the section part being a seal part as an interval. A double-sided uneven heating element having a heating part, wherein the segment heating part is formed in a stripe shape, and both sides of the double-sided uneven heating element have a height formed by a convex segment heating part and a flat segmentation part. A double-sided uneven heating element having an uneven surface, wherein the double-sided uneven heating element has a minimum bending resistance of 100 mm or less, one side has air permeability, and the other side has no air permeability. The breathable adhesive surface of the double-sided uneven heating element has air permeability and an adhesive portion, the non-adhesive surface does not have an adhesive portion, and the breathable adhesive surface is on the inside of the underwear. Apply the striped non-adhesive surface directly to the skin A method using a double-sided irregular heating element used. In other words, the method of using the double-sided uneven heating element of the present invention is that the double-sided uneven heating element of the present invention described above is bonded to the inner side of the underwear with a striped breathable adhesive surface. It is a method of use in which the surface is in direct contact with the skin.

  Hereinafter, although this invention is demonstrated in detail based on FIGS. 5-11, this invention is not limited by these.

FIG. 5 is a cross-sectional view showing a case where the separator is removed in another example of the double-sided uneven heating element 1 of the present invention. The striped exothermic composition molded body 3 formed with the moldable surplus water exothermic composition is sandwiched between the base material 15 and the covering material 14 and enclosed, and the eight striped exothermic portions 4 are encapsulated. A double-sided uneven flexible heating element 1 is provided.
The pressure-sensitive adhesive layer is provided as a gas-permeable pressure-sensitive adhesive layer 10 having air permeability on the gas-permeable covering material 14. The pressure-sensitive adhesive layer is provided in the form of stripes across both end portions 16 in the longitudinal direction of the double-sided uneven heating element, the vicinity of the top of each section heating portion 4 and both ends in the extending direction thereof.
A double-sided uneven heating element having a minimum bending resistance of 50 mm or less.

FIG. 6 is a sectional view showing a case where the separator is removed in another example of the double-sided uneven heating element 1 of the present invention. Stripe-like exothermic composition molded body 3 in which moldable excess water exothermic composition 2 is molded is sandwiched between and encapsulated between base material 15 and covering material 14 and is divided into eight strip-like exothermic parts 1. It is the double-sided uneven | corrugated flexible heat generating body 1 which has these.
The pressure-sensitive adhesive layer is provided as a gas-permeable pressure-sensitive adhesive layer 10 having air permeability on the gas-permeable covering material.
The pressure-sensitive adhesive layer is provided in stripes on both end portions 16 in the longitudinal direction of the double-sided uneven flexible heating element 1, the respective partition portions 6, and the partition portion extension portions 7.

FIG. 7 is a plan view showing a case where the separator is removed in another example of the double-sided uneven heating element 1 whose outer shape is a broad bean shape according to the present invention.
The segment heat generating portions 4 near both ends in the longitudinal direction of the double-sided uneven heating element 1 are formed to be elongated, but the other segment heat generating portions 4 are provided in stripes with the two segment heat generating portions 4 as a set. Yes.
In the double-sided uneven heating element 1 of this example, a mesh-like breathable pressure-sensitive adhesive layer 11 prepared by a melt blow method is provided on the entire breathable surface side on a breathable coating material.
A double-sided uneven heating element having a minimum bending resistance of 50 mm or less.

FIG. 8 is a plan view showing a case where the separator is removed in another example of the double-sided uneven heating element having a rectangular outer shape according to the present invention.
The segment heat generating portions 4 near the both ends in the longitudinal direction of the double-sided uneven heating element 1 are formed to be elongated. Yes.
In the double-sided uneven heating element 1 of this example, a mesh-like breathable pressure-sensitive adhesive layer 11 formed by a melt blow method on a breathable coating material 14 is provided on the entire breathable surface side.
A double-sided uneven heating element having a minimum bending resistance of 50 mm or less.

  Here, a heating element of a type provided with an adhesive layer on the non-breathable surface side will be described.

  In the present invention, the pressure-sensitive adhesive layer of the heating element is provided on the non-breathable surface side of the heating element, and the pressure-sensitive adhesive layer is mainly (1) a type provided in the section heating section, and (2) provided in the section section. (3) In the heating element of the type that directly contacts the skin of any of the types provided in the section heating section and the section section, since the hydrophilic nonwoven fabric is provided, the nonwoven fabric absorbs sweat. As a result, the heat can be released to the outside, and the heat storage preventing effect can be further improved, and stuffiness due to moisture can be prevented. At the same time, it is thought to prevent sweat from accumulating between the adhesive and the skin and causing the sheet to easily peel off.

  Furthermore, in the case of the type that is directly adhered to the skin, the segmented heat generating portions are provided at regular intervals, so that sufficient adhesion to the skin is obtained and it is not easily peeled off.

  In the case of the type that directly adheres to the skin, the width of the adhesive layer is 15 mm even if the ratio of the width of the divided heat generating portion and the divided portion (air layer portion) is within the range of 1: 1 to 2.5: 1. The following is preferable. Within this range, exfoliation of the heating element is further suppressed, and mounting properties are further improved.

In the case of the type that directly adheres to the skin, the adhesive enters the nonwoven fabric, but the adhesive does not reach the non-breathable film surface, leaving a nonwoven fabric layer (gap) that does not enter the adhesive, and the sheet surface It is preferable that aeration can occur as a whole. By adopting such a configuration, the effect of preventing redness and the like is further improved.
This is presumably because excess heat is released outside through this gap.

FIG. 9 is a sectional view showing another example of the double-sided uneven heating element 1 of the present invention. The striped exothermic composition molded body 3 formed with the moldable surplus water exothermic composition is sandwiched between the base material 15 and the covering material 14 and enclosed, and the eight striped exothermic portions 4 are encapsulated. A double-sided uneven flexible heating element 1 is provided. The pressure-sensitive adhesive layer 10 is provided on the non-breathable substrate 15.
The pressure-sensitive adhesive layer 10 is provided in a stripe shape across both end portions 16 in the longitudinal direction of the double-sided uneven heating element 1, the vicinity of the top of each section heating section 4, and the section heating section extension section 5 that is the extension direction thereof. .

Here, a double-sided uneven heating element of a type in which a heat generating sheet with holes is enclosed in a three-sided seal storage body will be described.
FIG. 10 (a) shows a double-sided uneven heat-generating sheet 26 provided with notches 25 at both ends of a stripe-shaped space and its extension in a storage bag sealed on three sides, and the other side is heat-sealed and pasted. It is the combined double-sided uneven heating element 1.
FIG.10 (b) is sectional drawing of the PP.
FIG. 10C is a cross-sectional view of the double-sided uneven heating element 1 having the breathable pressure-sensitive adhesive layer 10 provided in a stripe shape on the surface of the breathable coating material 14.
The pressure-sensitive adhesive layer 10 is provided in a stripe shape over both end portions 16 in the longitudinal direction of the double-sided uneven heating element 1 and on each space portion corresponding region and both ends in the extending direction thereof.
When the double-sided uneven heating element 1 of the type in which the exothermic composition molded body 21 composed of the heat generating sheet with holes is enclosed in a three-sided seal storage body is continuously produced, the seal portion is the bottom seal and the subsequent sides. If the exothermic composition molded body 26 composed of a heat-generating sheet with a hole is accommodated and the remaining seals are not hindered, the seals on both sides are sealed even in the middle of the seals on both sides. Even when the double-sided uneven heating element 1 in which the exothermic composition molded body 26 composed of a heat-generating sheet with holes is accommodated and the sealing of both sides is completed and then the other side is heat-sealed and bonded is manufactured. Good.

The heating element of the present invention is also a stretchable (extensible) heating element in which an arbitrary number of staggered cuts are provided in an arbitrary area other than the section heating part.
Here, arranging the cuts in a staggered manner means arranging the cuts so that the cuts can be deformed into a mesh or the like by stretching a packaging material of a non-stretchable material or a non-stretchable material. Unlike the processed net, the joint portion is integral, and a mesh can be formed while spreading by a certain cut length.
FIGS. 11A to 11F show plan views of examples of the cuts.

The shape of the notch is not limited. For example, as shown in FIG. 11 (g), the planar shape is as follows: (a) a straight line, (b) a rhombus, (c) a hexagon, The shape may be elliptical, (f) circular, (g) rectangular, (h) X-shaped, or the like.
Moreover, although there is no restriction | limiting of the elongation rate of the cut provided alternately, Preferably, it is 1.1 to 10 times and there is no restriction | limiting of a tensile strength, Preferably it is 3 N / 50mm or more.

FIG. 11 (a) is an example of a rectangular double-sided uneven heating element, and is a plan view of the double-sided uneven heating element 1 provided with a plurality of segment heating parts 4 at intervals and in the form of stripes (stripes). A double-sided uneven heating element (flexible heating element) in which eight section heat generating sections 4 are provided at intervals by a section section 6 comprising a heat seal section, and alternately provided with cuts 28 in the center section section. is there.
A solid pressure-sensitive adhesive layer with a separator is provided on the substrate side which is a non-breathable surface. The heating element 1 may be attached to the outside of the clothes and heat may be transmitted to the body through the clothes, or the adhesive layer for the body may be applied to the body to transmit heat to the body.
Further, as another example, a double-sided uneven heating element in which a mesh-like breathable pressure-sensitive adhesive layer 10 with a separator 11 is provided on the coating material 14 side which is a breathable surface. The heating element 1 may be attached to the inside of the garment, and heat may be transmitted to the body through the other surface of the heating element.
FIG. 11B is an example of a rectangular heating element, and is a plan view of the heating element 1 in which a plurality of segmented heat generating portions 6 are provided in a streak shape (striped shape) at intervals. Reference numeral 4 denotes a double-sided uneven heating element (flexible heating element) provided at intervals by a partitioning portion 6 made of a heat seal portion and provided with cuts 28 alternately in each partitioning portion.
A solid pressure-sensitive adhesive layer with a separator is provided on the substrate side which is a non-breathable surface. The heating element 1 may be attached to the outside of the clothes and heat may be transmitted to the body through the clothes, or the adhesive layer for the body may be applied to the body to transmit heat to the body.
In the double-sided uneven heating element of the present invention, an arbitrary number of staggered cuts may be provided in an arbitrary area other than the section heating part to provide a heating element that is stretchable (extendable).

In addition, the heating element of the present invention can be provided with an arbitrary number of notches such as perforations that can be alternately cut or manually cut in any region other than the section heating section, preferably in the section section.
This is because the section can be extended by providing these. Moreover, the adjacent division | segmentation heat_generation | fever part can be cut | disconnected. In addition, in a division part, it is preferable to provide over the edge | side which opposes from one side of a heat generating body. Moreover, it is preferable to arrange | position a notch | incision in the orthogonal | vertical direction with respect to the direction which wants to extend a heat generating body.

The cut is a cut through.
Further, a V notch may be provided in the outer edge portion of the heating element so as to be connected to perforations, staggered cuts, and the like.

As an effect of cutting,
1) Heating element with staggered notches (1) A non-stretchable (extensible) heat generating element can be made into a heat generating element having a stretchable (extensible) characteristic.
(2) The bending resistance can be further reduced.
(3) Staggered cuts with V notches prevent the rise of cuts around the heating element, which is excellent in design and increases the commercial value.
2) Perforated heating element or hand-cut perforated heating element (1) The bending resistance can be further reduced.
(2) Since each segment heat generating part can be separated, a small region such as a crucible can be partially made accurate, and only a desired simple region can be warmed.
(3) Perforated heating element that can be cut by hand
The user decides the shape according to which part of the body is warmed by the heating element, and can be used by dividing it from perforated perforations, and it can be used in the shape and size suitable for the place of use, so it is extremely efficient Is convenient and convenient. For example, if the neck is desired to be warmed, the object can be achieved without being bulky by dividing it into small elongated heat generating portions.
In addition, when used in both pockets, it can be used as a small rectangular heating section, which is extremely efficient.
Furthermore, depending on the place of use, it can be used as it is with a heating element including a plurality of small heating sections, and in this case, as in the case of a heating element consisting of a single conventional heating element, There is no disadvantage that the internal raw material is shifted to one side. Furthermore, in the present invention, a plurality of small divided heat generating portions are combined together in one large heat generating body as compared with the case where a mini-sized small heat generating body consisting of one heat generating portion is separately manufactured or packaged. Therefore, it is only necessary to cut the portion that was cut in the conventional method, and the cost is not increased. Further, since packaging can be performed with a large heating element, the packaging cost can be reduced.
In addition, the heating element provided with perforated perforations with V-notches makes tearing easier and more reliable when hand-cut, and can easily and reliably separate the section heat generating part. Excellent in design and increases product value.
In addition, the heat generating part (heat generating element) provided with a V-notched perforated perforation provided on the elastic support is easily and reliably stretchable (extensible) when the support is extended. It can be used as a heating element, is excellent in design, and increases the product value.

The hand-cut perforation has a notch that penetrates, and the length of the notch need not be the same as the interval between the notch and the notch, and there is no limitation as long as it can be cut when hand-cut. An example is given below.
1) The perforated perforation is a circular through-cut, and the diameter thereof is preferably 10 μm to 10 mmφ, more preferably 10 μmφ to 5 mmφ, and further preferably 100 μmφ to 5 mmφ. Is 500 μmφ to 0.5 mm.
In addition, the length of the cut is preferably 10 μm to 200 mm, more preferably 10 μm to 50 mm, still more preferably 10 μm to 30 mm, still more preferably 10 μm to 20 mm, and still more preferably. It is 100 micrometers-20 micrometers, More preferably, they are 100 micrometers-10 mm.
2) The length of the interval between the through notch and the adjacent notch is not limited, but is preferably 1 μm to 10 mm, more preferably 1 μm to 7 mm, still more preferably 1 μm to 5 mm, and further Preferably it is 1 micrometer-1 mm.
3) The ratio (A / B) of the length (A) of the cut through and the shortest length (B) between adjacent cuts is preferably 1 or more, more preferably 1 to 50, and still more preferably. Is from 5 to 40, more preferably from 10 to 30.
4) The front end of the perforation cut has a side and a contact point of the heating element.
5) Two or more rows of perforated perforations may be provided in parallel.
6) Perforated perforated lines may be provided in a region other than the divided heat generating portion with a predetermined interval in the vertical, horizontal, vertical and horizontal directions.

There is no limitation on the shape after stretching the alternate cuts, and the size of the mesh shape after stretching the alternate cuts is not limited.
FIG. 7D shows a plan view of an example of the cut.

The length, longest diameter or longest side of the notch is not limited, but is preferably 1 to 50 mm, more preferably 1.5 to 50 mm, still more preferably 2 to 30 mm, and even more preferably. Is 5-20 mm.
There is no limitation on the width and the shortest side, preferably more than 0 and 50 mm, more preferably more than 0 and 30 mm, still more preferably more than 0 and 10 mm, still more preferably more than 0 and 5 mm. is there.
In addition, although there is no restriction | limiting in the mutual space | interval (cutting feed width, W1) of the extending direction of an opposing notch, Preferably, it is 0.5-20 mm, More preferably, it is 0.5-10 mm, More preferably, it is 0. .5 to 8 mm, more preferably 1 to 7 mm. More preferably, it is 2-6 mm.
The mutual distance (cut width, W2) orthogonal to the extending direction of the cut is not limited, but is preferably 0.5 to 20 mm, more preferably 1 to 20 mm, and further preferably 2 to 15 mm. More preferably, it is 3-15 mm, More preferably, it is 5-15 mm.

  When a non-extensible material is used as a flexible material for a flexible holding member, extensibility or stretchability can be obtained by deforming a plurality of cuts penetrating in the thickness direction arranged alternately. The extensibility and the like depend on the shape when deformed. If the rhombus is formed when it is elongated, the extensibility or stretchability is increased.

  Although there is no restriction | limiting in particular as an example of the arrangement | positioning means of this cutting, It can mention using an expand cutter, a rotary die cutter, pig removal, a laser, etc. When using an expand cutter, it can be easily cut into an adhesive tape or an adhesive tape with a double separator, such as a thick substrate, and when a rotary die cutter is used, continuous operation is possible. It is also possible to form a cut from the base material or the like or the adhesive surface side.

  Here, staggered placement means that the cuts are staggered so that the cuts can be deformed into a mesh or the like by stretching a packaging material such as a non-stretchable material or a non-stretchable material. This means that, unlike a net obtained by processing a string or the like, the joint portion is integral, and a mesh can be formed while expanding by a certain cut length.

  In the case where a plurality of cuts penetrating in the thickness direction arranged alternately are formed, taking a linear cut as an example, it is described in metal lath processing such as JIS-A5505. By this cutting, it is possible to expand and contract in the direction perpendicular to the longitudinal direction, and it is possible to obtain a mesh shape whose shape can be freely changed.

The heating element of the present invention is preferably stretchable in the direction perpendicular to the longitudinal direction of the cut, and the elongation rate is not limited, but it is preferably 1.2 to 10 times, although it depends on the application. Preferably it is 1.3-10 times, More preferably, it is 1.5-10 times, More preferably, it is 2-6 times. If it is less than 1.2 times, the shape followability is insufficient, and if it exceeds 10 times, the opening of the mesh becomes too large and the tensile strength may be lowered. Here, the expansion ratio (times) means a quotient obtained by dividing the length after expansion by the length before expansion.
Moreover, although there is no restriction | limiting of the tensile strength of the heat generating body which has the notch | incision of this invention, as a preferable example, it is 3 N / 50mm or more.

  Since the heating element of the present invention can be obtained in various shapes, thicknesses, and temperature zones, it is not for normal body warming, for joints, for facial use, for eyes, for slimming, for drip solution warming / warming, warmth For poultice, drug body warmers, cervical, waist, mask, gloves, heels, or symptom relief cushions for shoulder pain, muscle pain, menstrual pain, etc. It can be used in various applications such as for sheets, for transpiration fragrances, for abdomen, for transpiration insecticides, and for treatment. Furthermore, it can be used for warming / insulating machines and pets.

  EXAMPLES Next, although an Example demonstrates this invention concretely, this invention is not limited by these.

Example 1
Uses breathable packaging material with nylon nonwoven fabric and porous polyethylene film as coating material, and non-breathable packaging material with nylon nonwoven fabric and polyethylene film as base material. As composition, iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 2 3 parts by weight, 0.5 parts by weight of slaked lime, 0.2 parts by weight of sodium carboxymethyl cellulose, 0.7 parts by weight of sodium sulfite, and 11% saline solution, and a water-containing exothermic composition having a mobile water value of 13. It was used. The forming degree was 10.
The breathability of the coating material was 8,000 seconds / 100 cc as measured by the Gurley method.

Using the moldable surplus water exothermic composition, with a 15 mm interval in the center, 11 mm intervals on both sides, and through-molding using 3 punches with 8 mm width x 79 mm length punch holes Six exothermic composition molded bodies were laminated on the polyethylene film surface of the substrate having a length of 150 mm and a width of 120 mm.
The covering material is covered so that the polyethylene film surfaces overlap each other, the peripheral part of the double-sided uneven heating element is 8 mm wide, the central part is 13 mm wide, and the central part between the exothermic composition molded bodies is 9 mm wide. Then, the peripheral portion of the exothermic composition molded body and the peripheral portion of the heat generating body were bonded by heating to form a double-sided uneven heat generating element having a length of 125 mm and a width of 95 mm having six divided heat generating portions. The separator having a pressure-sensitive adhesive layer provided in a stripe shape corresponding to the section including the both ends and the center in the longitudinal direction of the double-sided uneven heating element and the extension of the partitioning part is used as the air permeability of the double-sided uneven heating element. A double-sided uneven heating element having a breathable pressure-sensitive adhesive layer with a separator was prepared by pasting on the surface in correspondence with the section including the both ends and the center in the longitudinal direction and the section extension.
The minimum bending resistance of the double-sided uneven heating element without the separator was 25 mm in the longitudinal direction perpendicular to the direction of the striped segment heating part (L direction in FIG. 2). The pressure-sensitive adhesive layer is formed along the divided heat generating portion, along both ends in the longitudinal direction (width 8 mm), the divided portion (width 9 mm, the width of the central divided portion region is 13 mm), and the extended portion (width 9 mm). The width of the central extension section is 13 mm). The pressure-sensitive adhesive layer is provided so as to slightly cover each of the planar end portions of the section heat generating portion.
Furthermore, this double-sided uneven heating element was sealed in a non-breathable outer bag and allowed to stand at room temperature for 24 hours. In addition, 5 double-sided uneven heating elements were produced.
In addition, as a comparative example, a commercially available warmer having a length of 125 mm and a width of 95 mm, which is a flat continuous heating part, was used. The width of the seal (bonding) part was 5 mm. A stripe-like pressure-sensitive adhesive layer similar to that in Example 1 was provided on the ventilation surface side.

About the double-sided uneven heating element manufactured as described above, the heating bag is taken out from the outer bag, and the inside of the underwear corresponding to the waist in the normal clothing of 7 adult men in a test room at a temperature of 100 ° C. and a relative humidity of 50% Then, the breathable adhesive surface of the double-sided uneven heating element was affixed, and the sense of use was examined over 5 hours. In addition, the commercially available body warmer as a comparative example was stuck on the outer side of the corresponding underwear.
During this time, temperature changes were measured by attaching temperature sensors to the central part of the skin surface in contact with the heat generating bag and the central part of the heat generating bag in contact with the skin. Furthermore, immediately after removing the double-sided uneven heating element, the skin surface temperature of the portion where the double-sided uneven heating element was mounted was measured by a thermograph.

  About the exothermic sheet | seat produced as mentioned above, the ease of occurrence of redness etc., the mounting | wearing property of a sheet | seat, and a thermal effect were evaluated as follows. The results are shown in Table 1.

(Redness, treatment etc.)
It was repeatedly applied to the same part of the waist of 7 subjects for 8 hours a day for 3 days. Then, it was peeled off, and the condition of the skin surface was observed to evaluate the degree of redness. Table 1 shows the number of people whose skin redness remains even 30 minutes after sheet peeling.

(Usability)
The mountability of the double-sided uneven heating element conformed to the following criteria.
○: Fits to the body, does not peel off, and does not feel uncomfortable △: The heating element peels off when the pasting part is moved greatly, and there is a slightly uncomfortable feeling ×: The body does not fit, and the heating element peels off immediately or generates heat Float

(Heat effect) A fever sheet was affixed to 10 subjects with chronic low back pain for 2 hours, and the low back pain alleviating effect was evaluated according to the following criteria.

○: The number of people who felt effective was 7 or more. Δ: The number of people who felt effective was 4-6. ×: The number of people who felt effective was 3 or less.

* The obtained heating element is heated in a normal atmosphere, and the time when the temperature of the heating element falls below 35 ° C is assumed to be the end of use, and is the same as the measurement of the minimum stiffness of the heating element before heating. Then, the bending resistance of the heating element at that time is measured and set as the minimum bending resistance of the heating element after the end of heating.

  As is clear from Table 1, it can be seen that the heat generation sheet using hydrophilic rayon for the nonwoven fabric is less likely to cause redness or the like than the heat generation sheet using the hydrophobic nonwoven fabric. Furthermore, it has been found that by providing an interval between the pressure-sensitive adhesives, even when used repeatedly for a long time, no redness or the like occurs and the stability is extremely high. Further, the sheet was not peeled off due to perspiration, and the wearability was high.

In addition, a comfortable temperature sensation was obtained during use, regardless of changes in body posture. The skin surface temperature when the fever bag was worn was close to that of the fever bag, and it was confirmed that heat was efficiently transmitted to the body. Furthermore, it was recognized that the temperature rose over a wide range from the measurement of the temperature at the periphery of the mounting using a thermograph immediately after the heating bag was removed. In addition, warmth continued even after the fever was removed.
The double-sided uneven heating element using hydrophilic rayon for the nonwoven fabric is less likely to cause redness or the like than the heating element using the hydrophobic nonwoven fabric in which the flat heating portion is composed of one piece. Furthermore, it was found that by providing an interval between the divided heat generating portions, redness or the like does not occur even when used repeatedly for a long time, and the stability is extremely high. Further, the sheet was not peeled off due to perspiration and the wearability was high.

(Example 2)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 2.3 parts by weight , 0.5 parts by weight of slaked lime, 0.2 parts by weight of sodium carboxymethylcellulose, 0.7 parts by weight of sodium sulfite, and 11% saline are mixed to obtain a moldable surplus water heating composition having a mobile water value of 10. It was. The forming degree was 10.
An acrylic pressure-sensitive adhesive layer having a thickness of 30 μm with a separator formed by die-cutting using a mold having a moldable excess water exothermic composition and having five punches having a width of 5 mm × length of 80 mm at intervals of 5 mm. The exothermic composition molded body 6 constituting the five segmental exothermic parts was provided on the polyethylene film 7 provided with the above.
Next, a breathable coating material in which a nylon non-woven fabric having a weight per unit area of 40 g / m ² is laminated on the polyethylene porous film is covered on the exothermic composition molded body, and the covering material in the equivalent area of the dividing portion 4 is covered. And the substrate was heat-sealed.
Next, the division part which is a seal part of the peripheral part of each exothermic composition molded body was heat-sealed with a seal width of 3 mm, and a divided heat generation part divided by the division part was created. Moreover, the site | part used as the outer peripheral part of the said heat generating body was sealed by the seal width of 8 mm.
And the heat generating body which has a stripe-shaped division | segmentation heat generating part of length 98mm x width 91mm was obtained.
The breathability of the breathable coating material was 7,000 seconds / 100 cc as measured by the Gurley method.
The bending resistance was 20 mm in the long side direction (direction perpendicular to the stripe direction) of the heat generating portion, and was 80 mm or more in the short side direction (stripe direction). The bending resistance ratio (the bending resistance in the direction orthogonal to the minimum bending resistance / the minimum bending resistance) in the two directions that are substantially perpendicular to each other was 4 or more. As described above, when the bending resistance in one direction is very high, and the bending resistance in a direction perpendicular to the one direction is very low, the handleability and the feeling of use are very excellent. Moreover, since this heat generating body 1 can be wound, it becomes compact and is convenient for storage. In addition, in the case of the heat generating body 1 with a separator, it can be wound if a separator with low bending resistance is used.
The double-sided uneven heating element was hermetically stored in a non-breathable storage bag (hereinafter referred to as an outer bag) and left at room temperature for 24 hours.
Further, as a comparative example, a double-sided uneven flexible heating element was prepared in the same manner as in Example 2 except that a nylon nonwoven fabric was used instead of hydrophilic rayon.

  About the double-sided uneven | corrugated shaped heating element produced as mentioned above, the ease of occurrence of redness etc., the mounting | wearing property of a sheet | seat, and a thermal effect were evaluated as follows. The results are shown in Table 2.

(Redness, treatment etc.)
It was repeatedly applied to the same part of the waist of 10 subjects for 8 hours a day for 3 days. Then, it was peeled off, and the condition of the skin surface was observed to evaluate the degree of redness. Table 1 shows the number of people whose skin redness remains even 30 minutes after sheet peeling.

  As is apparent from Table 2, it can be seen that the heat generating sheet using hydrophilic rayon for the nonwoven fabric is inferior in water absorption such as sweat and slightly inferior to the heat generating element using the hydrophobic nonwoven fabric. In both cases, the sheet was not peeled off due to perspiration and the wearability was high.

In addition, a comfortable temperature sensation was obtained during use, regardless of changes in body posture. The skin surface temperature when the fever bag was worn was close to that of the fever bag, and it was confirmed that heat was efficiently transmitted to the body. Furthermore, it was recognized that the temperature rose over a wide range from the measurement of the temperature at the periphery of the mounting using a thermograph immediately after the heating bag was removed. In addition, warmth continued even after the fever was removed.
The double-sided uneven heating element using hydrophilic rayon for the nonwoven fabric is less likely to cause redness or the like than the heating element using the hydrophobic nonwoven fabric in which the flat heating portion is composed of one piece. Furthermore, it was found that by setting the interval between the divided heat generating portions to 3.5 to 10 mm, redness or the like does not occur even when used repeatedly for a long time, and the stability is extremely high. Further, the sheet was not peeled off due to perspiration and the wearability was high.

(Example 3)
As the oxidizing gas contact treatment device, a batch type oxidizing gas contact treatment device with stirring composed of a mixer equipped with a rotating blade for stirring was used, and air was used as the oxidizing gas.
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 2.3 parts by weight The reaction mixture having a mobile water value of less than 0.01 comprising 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 10 parts by weight of 11% saline is added to the batch type oxidizing gas contact treatment apparatus with stirring. I put it in.
Next, in an environment of 20 ° C., the upper part of the oxidizing gas contact treatment device is open, and is self-heated while stirring in the air, and when it reaches 27 ° C. in 20 seconds, The contact-treated reaction mixture was sealed in a non-breathable storage bag and allowed to stand at room temperature to obtain an exothermic mixture of the present invention.
Next, 11% saline was added to the exothermic mixture and mixed to obtain a moldable surplus water exothermic composition having a mobile water value of 9.

In addition, when a moldability test of the exothermic composition containing excess water was conducted, the exothermic composition molding was not performed even when the punching mold was separated from the exothermic composition molded body, and the exothermic composition molded body was not deformed. There was no collapsed piece of the exothermic composition molded body around the body. The forming degree was 10.
When the exothermic composition exothermic test of this exothermic composition was conducted, the same result as in Example 1 was obtained.

An acrylic pressure-sensitive adhesive layer having a thickness of 30 μm with a separator formed by die-cutting using a mold having a moldable excess water exothermic composition and having five punches having a width of 5 mm × length of 80 mm at intervals of 5 mm. The exothermic composition molding which comprises the five division | segmentation heat_generation | fever parts 3 was provided on the polyethylene film which provided this.
Next, a breathable coating material in which a nylon nonwoven fabric having a basis weight of 40 g / m ² is laminated on a polyethylene porous film is passed through a folding machine having a pair of concavo-convex surfaces and folded into a corrugated shape. . Then, the valley portion of the covering material 8 is pressed against the base material with a folding tool having an uneven surface, the heating composition molded body is wrapped and covered in the peak portion of the covering material, and the covering material and the base material in the equivalent area of the dividing portion are heated. Sealed.
Next, the division part which is a seal part of the peripheral part of each exothermic composition molded body was heat-sealed with a seal width of 3 mm, and a divided heat generation part divided by the division part was created. Moreover, the site | part used as the outer peripheral part of the said heat generating body was sealed by the seal width of 8 mm.
And the uneven | corrugated double-sided heating element which has the stripe-shaped division | segmentation heat generating part of length 98mm x width 91mm was obtained.
The breathability of this breathable coating material was 8,000 seconds / 100 cc as measured by the Gurley method.
The bending resistance was 20 mm in the long side direction (direction perpendicular to the stripe direction) of the heat generating portion, and was 80 mm or more in the short side direction (stripe direction). The bending resistance ratio was 4 or more in the two directions that are almost perpendicular to each other. As described above, when the bending resistance in one direction is very high, and the bending resistance in a direction perpendicular to the one direction is very low, the handleability and the feeling of use are very excellent. Moreover, since this heat generating body 1 can be wound, it becomes compact and is convenient for storage. In the case of the double-sided uneven heating element 1 with a separator, the separator can be wound by using a separator having low bending resistance.

(A) It is a top view which shows an example of the heat generating body of this invention. (A) (b) It is explanatory sectional drawing which shows an example of the softness | flexibility comparison of the uneven | corrugated shaped heating element of this invention, and a conventional heating element. (C) It is a top view of the conventional heat generating body which has the heat generating part which consists of one continuous body. (A) It is a top view which shows an example of the relationship between the exothermic composition molded object which consists of a moldable excess water exothermic composition of this invention, and a base material. (B) It is the same sectional view. (C) It is a top view which shows an example of the relationship between the heat-generation composition molded object which consists of a sheet-like heat-generating piece of this invention, and a base material. (D) It is the same sectional view. (E) It is sectional drawing which shows an example of the relationship of the exothermic composition molded object which consists of a sheet-like exothermic piece of this invention, and a base material. (F) It is a top view which shows an example of the relationship of the exothermic composition molded object which consists of a heat_generation | fever sheet | seat with a hole of this invention, and a base material. (G) It is sectional drawing of the same VV. (H) It is sectional drawing which shows another example of the relationship between the heat-generating composition molded object which consists of a heat-generating sheet with a hole of this invention, and a base material. (I) It is a top view which shows another example of the relationship between the heat_generation | fever composition molded object which consists of a heat_generation | fever sheet | seat with a hole of this invention, and a base material. (J) It is sectional drawing of the UU. (K) It is sectional drawing which shows another example of the relationship between the heat-generating composition molded object which consists of a heat-generating sheet with a hole of this invention, and a base material. (L) It is a top view which shows an example of the relationship between the heat-generating composition molded object which consists of a sheet-like heat-generating piece with a hole of this invention, and a base material. (M) It is sectional drawing of TT. (N) It is a top view which shows another example of the relationship between the exothermic composition molded object which consists of a sheet-like exothermic piece with a hole of this invention, and a base material. (O) It is sectional drawing of SS. It is sectional drawing which shows another example of the heat generating body of this invention. (A) It is a top view which shows an example of the relationship between the exothermic composition molded object which consists of a moldable excess water exothermic composition of this invention, and a base material. (B) It is sectional drawing of the same RR. (C) It is a top view which shows an example of the relationship between the exothermic composition molded object which consists of a moldable excess water exothermic composition of this invention, and a base material. (D) It is sectional drawing of the same RR. It is sectional drawing which shows another example of the heat generating body of this invention. It is sectional drawing which shows another example of the heat generating body of this invention. It is a top view which shows another example of the heat generating body of this invention. It is a top view which shows another example of the heat generating body of this invention. It is sectional drawing which shows another example of the heat generating body of this invention. It is a top view which shows another example of the heat generating body of this invention. (A)-(f) It is a top view which shows another example of the heat generating body of this invention. (G) The top view which shows an example of the planar shape of the notch | incision of this invention. It is a top view which shows an example of the outer shape of the heat generating body of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exothermic body 2 Exothermic composition 3 Excess water exothermic composition molded body 4 division | segmentation heating part 5 division | segmentation heating part extension part 6 division part 7 division part extension part 8 non-adhesive layer surface 9 adhesive layer surface 10 adhesive layer 11 mesh shape Breathable pressure-sensitive adhesive layer 12 Breathable part 13 Heat seal part (partitioning part)
14 covering material 15 base material 16 longitudinal end 17 separator 18 support base 19 heat generating part 20 heat generating composition formed body composed of sheet-shaped heat generating piece 21 heat generating composition formed body composed of 21 heat-generating sheet with hole 22 sheet-shaped heat generating piece with hole Exothermic composition formed body 23 space 24 fixed layer 25 notched portion 26 heat generating sheet 27 with hole 26 housing L L heating element longitudinal direction S direction perpendicular to heating element longitudinal direction

Claims (11)

  A heating element comprising a heat-generating composition molded body that generates heat upon contact with oxygen, wherein a plurality of the molded bodies are arranged and sandwiched between a base material and a covering material, and the periphery of the molded body is included. To form a section heat generating portion including the molded body and a section formed by a seal portion, and the heat generating body includes four or more section heat generating sections, and the length of the section heat generating section. The thickness is 5 mm to 300 mm, the width is 1 mm to less than 25 mm, the height is 0.1 mm to less than 10 mm, the length with respect to the width is 2.0 to 60, and the width of the section is 0.1 mm or more A double-sided uneven heating element, wherein the heating element has a minimum bending resistance of 100 mm or less and a minimum bending resistance ratio of 60 or less.   The molded body comprises a mixture containing iron powder, a carbon component, a reaction accelerator and water as essential components, an easy water value of 0.01 to 13.5, a molding degree of 5 or more, and moisture in the mixture. Excess water exothermic composition that does not function as an air barrier layer and causes an exothermic reaction immediately after production and causes an exothermic reaction with a temperature rise of 5 ° C. or more within 5 minutes after being left in air in a 20 ° C. environment without wind The double-sided uneven heating element according to claim 1, wherein the heating element is formed into a strip shape by molding.   The double-sided uneven heating element according to claim 1 or 2, wherein the exothermic composition molded body is one of a heat generating sheet with holes, a heat generating sheet piece with holes, and a heat generating piece.   The double-sided uneven heating element according to any one of claims 1 to 3, wherein a notch is formed between the adjacent section heating portions.   The double-sided uneven heating element according to claim 4, wherein a notch is provided at an end of the cut.   The double-sided uneven heating element according to any one of claims 1 to 5, wherein a change in minimum bending resistance before and after the heat generation of the heating element is 30% or less.   The double-sided uneven heating element according to any one of claims 1 to 6, wherein incisions are alternately arranged in a region other than the section heating section along the longitudinal direction of the section heating section.   The double-sided uneven heating element according to any one of claims 1 to 7, wherein a fixing means is provided at an exposed portion of the double-sided uneven heating element.   The double-sided uneven heating element according to claim 8, wherein the fixing means is an adhesive layer.   10. The double-sided uneven heating element according to claim 9, wherein the adhesive layer is provided in a region extending in the longitudinal direction from the section and in both longitudinal ends of the heating element.   The pressure-sensitive adhesive layer is provided in a region extending in the longitudinal direction from the top region of each of the divided heat generating portions and in both longitudinal ends of the heat generating element, and a ventilation surface is provided from a side surface portion of the divided heat generating portion. The double-sided uneven heating element according to claim 9.

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