JP2019187963A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article that suppresses a wearer's perception of cold sensation at a desired timing without heating an absorber. An absorbent article 1 of the present invention includes a topsheet 2 located on the skin facing surface side, a backsheet 3 located on the non-skin facing surface side, and an absorber 4 interposed between the two sheets. , A longitudinal direction extending from the abdominal side of the wearer to the dorsal side through the crotch portion, and a width direction orthogonal to the longitudinal direction. The absorber 4 has a recessed portion 5 that is recessed from the skin facing surface side to the non-skin facing surface side and extends in the longitudinal direction. The warming agent 6 is disposed on the skin-facing surface side of the topsheet 2, and at least one between the topsheet 2 and the absorber 4. The warming agent 6 arranged on the skin-facing surface side of the topsheet 2 is contained in a water-disintegrating capsule. [Selection diagram] Figure 2

Description

  The present invention relates to an absorbent article.

  Absorbent articles such as incontinence pads generally have a liquid-permeable surface sheet that is disposed relatively near the wearer's skin, and a back sheet that is disposed relatively far from the wearer's skin. And an absorber interposed between the two sheets. In recent years, in order to reduce the discomfort at the time of wearing of an absorbent article, the absorbent article which provided various functions has been proposed.

  For example, Patent Literature 1 discloses an absorbent article including an agent that transmits perception to a wearer. In this document, as an agent contained in an absorbent article, for example, an agent intended for a temperature receptor such as a refreshing agent can be provided, and a refreshing feeling and a dry feeling can be provided to the wearer of the absorbent article. It is disclosed.

  Patent Document 2 discloses an absorbent article having the above-described general configuration in which a volatile agent such as a cooling sensation agent is applied to the bottom of the second recess of the top sheet. ing. It is also disclosed that the absorbent article described in the document can make the wearer less susceptible to irritation by a drug such as a cooling sensation agent and enhance the feeling of use.

  Further, Patent Document 3 discloses an absorbent article including a microcapsule containing a cooling sensation component in addition to the above-described general configuration. The absorbent article of this document has a structure in which the number density of microcapsules on the skin contact surface side of the skin contact sheet is lower than the number density of microcapsules on the non-skin contact surface side of the sheet. It is also disclosed that an appropriate cooling effect can be imparted early and over a long period of time.

JP-T-2004-528090 Japanese Patent Laid-Open No. 2006-220983 JP 2017-12455 A

  By the way, since absorbent articles, such as an incontinence pad, are mainly worn when the wearer is active, it is not easy to immediately replace the absorbent article after liquid absorption. In particular, when the absorbent article after liquid absorption has been worn for a long time, the body fluid absorbed by the absorbent body causes the discomfort such as a cool feeling to the wearer due to the decrease in temperature. In addition, the wearer's perception of coolness may induce further urine leakage or increase anxiety about urine leakage.

  In the absorbent articles described in Patent Documents 1 to 3, no countermeasure against such a cooling sensation is taken. As a result, urine leakage is further induced and anxiety about urine leakage is further increased.

  Therefore, the subject of this invention is providing the absorbent article which can solve the fault of a prior art.

The present invention comprises a top sheet positioned on the skin facing surface side, a back sheet positioned on the non-skin facing surface side, and an absorbent body interposed between the two sheets, from the wearer's stomach side through the crotch portion. An absorbent article having a longitudinal direction extending to the back side and a width direction orthogonal to the longitudinal direction,
The absorber has a recess extending in the longitudinal direction on the skin facing surface side,
A warming agent is disposed on the skin facing surface side of the top sheet,
The warming sensate provides an absorbent article encapsulated in a water-disintegrating capsule.

Further, the present invention comprises a front sheet positioned on the skin facing surface side, a back sheet positioned on the non-skin facing surface side, and an absorbent body interposed between both sheets, and the crotch portion is formed from the wearer's stomach side. An absorbent article having a longitudinal direction extending through the back side and a width direction perpendicular to the longitudinal direction,
The absorber has a recess extending in the longitudinal direction on the skin facing surface side,
The present invention provides an absorbent article in which a warming sensation agent is disposed between the top sheet and the absorber.

The present invention further includes a top sheet positioned on the skin facing surface side, a back sheet positioned on the non-skin facing surface side, and an absorbent body interposed between both sheets, from the wearer's stomach side through the crotch portion. An absorbent article having a longitudinal direction extending to the back side and a width direction orthogonal to the longitudinal direction,
The absorber has a recess extending in the longitudinal direction on the skin facing surface side,
The first warming agent is disposed on the skin facing surface side of the top sheet,
The first warming agent is contained in a water-disintegrating capsule, and the second warming agent is provided between the top sheet and the absorbent to provide an absorbent article. It is.

  According to the present invention, at a desired timing such as when fluid is excreted, the wearer's sense of cold and discomfort caused by the perception can be suppressed without heating the absorber, and further urine leakage can be induced. Anxiety about urine leakage can be resolved. That is, comfort at the time of wearing can be improved.

FIG. 1 is a schematic cross-sectional view showing an embodiment of the absorbent article of the present invention. 2 (a) to 2 (d) are enlarged schematic diagrams (corresponding to FIG. 1) showing the arrangement positions of the surface sheet, the absorber, and the warming agent in the absorbent article of the present invention. 3 (a) and 3 (b) are enlarged schematic diagrams (corresponding to FIG. 1) showing other arrangement positions of the surface sheet, the absorbent body, and the warming agent in the absorbent article of the present invention. FIG. 4 is an enlarged schematic view of the main part showing the fiber density of the convex part and the side wall part in the surface sheet. 5 (a) and 5 (b) are schematic views showing an apparatus suitably used for manufacturing the topsheet shown in FIGS. 2 (a) to 2 (d).

  The present invention will be described below based on preferred embodiments with reference to the drawings. The absorbent article of the present invention has a vertically long shape having a longitudinal direction corresponding to a direction extending from the wearer's stomach side to the back side through the crotch part and a width direction perpendicular thereto. And an absorbent article has a crotch part distribute | arranged to a wearer's crotch part, and the abdominal side part and back side part which are extended before and behind that. The crotch portion has an excretion portion facing portion that is disposed to face the excretion portion of the wearer when the absorbent article is worn, and the excretion portion facing portion is usually the central portion in the longitudinal direction of the absorbent article or the vicinity thereof Is located.

  The absorbent article of this invention is provided with the surface sheet located in a wearer's skin opposing surface side, the back surface sheet located in the non-skin opposing surface side, and the absorber arrange | positioned between both sheets. For example, as shown in FIG. 1, the absorbent article 1 includes a top sheet 2, a back sheet 3, and an absorbent body 4 interposed between both sheets 2 and 3. In addition, a skin opposing surface is a surface distribute | arranged to the wearer's skin side at the time of wear among the front and back both surfaces of each member which comprises the absorbent article 1, and a non-skin opposing surface is the absorbent article 1 Of the front and back surfaces of each member to be configured, it is a surface directed to the side opposite to the wearer's skin when worn. In the following description, in FIGS. 1 to 3, the upper side is the skin facing surface side, and the lower side is the non-skin facing surface side.

  As the surface sheet 2, a sheet having liquid permeability can be used. Examples of such sheets include nonwoven fabrics such as air-through nonwoven fabric, spunbond nonwoven fabric, spunlace nonwoven fabric, meltblown nonwoven fabric, resin bond nonwoven fabric, and needle punched nonwoven fabric. Moreover, the laminated body which combined 2 or more types of these nonwoven fabrics, and the laminated body which combined these nonwoven fabrics and the perforated film etc. can also be used.

The basis weight of the surface sheet 2 is preferably 10 g / m ² or more, more preferably 15 g / m ² or more, and preferably 40 g / m ² or less, more preferably 35 g / m ² or less. The basis weight of the nonwoven fabric is preferably at most 10 g / ^{m 2} or more 40 g / ^{m 2,} further preferably 15 g / ^{m 2} or more 35 g / ^{m 2} or less. When a nonwoven fabric laminate (multilayer body) is used as the top sheet 2, the above numerical values refer to the total basis weight of the laminate (multilayer body).

  For example, as shown in FIGS. 2A to 2D, the surface sheet 2 may be formed as a multilayer structure using two or more non-woven fabrics, as shown in FIGS. ), The topsheet 2 can be formed as a single layer structure using a single non-woven fabric. Moreover, even if the surface sheet 2 is in any form, the surface sheet 2 may have an uneven shape in which a plurality of concave portions and convex portions are formed on the skin facing surface side, On the skin facing surface side, it may be a ridge groove shape in which ridge portions and groove portions extending in one direction are alternately formed, or may be a flat shape having no irregularities and ridge grooves. In the following description, a convex portion or a flange portion is simply referred to as a “convex portion”, and a concave portion or a groove portion is simply referred to as a “concave portion”.

  2 (a) to 2 (d) has a structure in which a lower layer nonwoven fabric 2a located on the side far from the wearer's skin and an upper layer nonwoven fabric 2b located on the wearer's skin side are laminated. is doing. Moreover, in the same figure, the several convex part 21 protruded toward the wearer's skin side and the recessed part 22 located between this convex part 21 are formed in the skin opposing surface side of the upper layer nonwoven fabric 2b in the surface sheet 2. FIG. Has been. The convex portion 21 is formed so as to protrude from the lower layer nonwoven fabric 2a, and a region 25 defined by the convex portion 21 and the concave portion 22 is hollow. On the other hand, the lower layer nonwoven fabric 2a of the surface sheet 2 is substantially flat.

  Thus, since the surface sheet 2 has a hollow structure, the unevenness of the surface sheet is easily crushed when the absorbent article is worn, so that the contact area with the skin increases. As a result, a lot of warming sensation agents to be described later act on the skin, and the wearer can effectively suppress the perception of cooling sensation. In particular, when the topsheet 2 having a laminated structure having a hollow region 25 as shown in FIGS. 2A to 2D is used, the concavo-convex structure is restored in addition to the suppression of the wearer's perception of cooling sensation. Since it is easy to be done, a soft texture is easy to be maintained, and as a result, the comfort at the time of wear of an absorptive article can be improved further.

  As shown in FIGS. 2A to 2D, when the topsheet 2 has a laminated structure, the fiber density of the constituent fibers of the upper nonwoven fabric 2b is higher than the fiber density of the constituent fibers of the lower nonwoven fabric 2a. It is preferable that By having such a fiber density configuration, moisture containing a thermal sensation agent, which will be described later, is likely to move to the upper nonwoven fabric side by capillary action, so that the thermal sensation agent is likely to act on the wearer's skin. As a result, the wearer's perception of cool feeling can be further suppressed.

Fiber density of the fibers constituting the upper layer nonwoven fabric 2b is preferably 10 g / cm ³ or more, further preferably 15 g / cm ³ or more, is preferably 35 g / cm ³ or less, 25 g / cm More preferably, it is ³ or less. Similarly, the fiber density of the constituent fibers in the lower layer nonwoven fabric 2a is preferably 1 g / cm ³ or more, more preferably 5 g / cm ³ or more, and preferably 15 g / cm ³ or less. More preferably, it is 10 g / cm ³ or less. These fiber densities can be measured by a fiber density measuring method described later.

  Even when the topsheet 2 is formed using one nonwoven fabric as shown in FIGS. 3A and 3B, the topsheet 2 has a plurality of protrusions protruding toward the skin side of the wearer. And a concave portion located between the convex portions (not shown). For example, the convex portion 21 and the concave portion 22 in the single-layer surface sheet 2 are formed of, for example, the convex portion 21 from a relatively thick portion in the sheet 2 and the concave portion 22 is relatively thin in the sheet 2. It can provide by comprising from a site | part. Such convex portions and concave portions can be formed by performing, for example, embossing or processing for pressing a single-layer sheet against a mold complementary to a desired shaping shape. .

  From the viewpoint of sheet flexibility, the skin facing surface of the top sheet 2 has a contour that draws a smooth convex curve, and the non-skin facing surface of the top sheet 2 is convex and smooth and gentle. It is preferable that the contour draws a simple curve. At this time, the concave portion is provided at the position of the non-skin facing surface of the top sheet 2 corresponding to the position at which the convex portion 21 is provided on the skin facing surface of the top sheet 2. It is even more preferable that the ridge is provided at the position of the non-skin facing surface of the topsheet 2 corresponding to the position where the recess 22 is provided. By configuring the surface sheet 2 in this way, even if the sheet 2 has a single-layer structure, a hollow region can be formed inside the convex portion 21, and the flexibility of the sheet can be further increased.

  Even if the topsheet 2 has a single layer structure or a multilayer structure, when the plurality of convex portions 21 are formed on the topsheet 2, the fiber density at the top portion 21a of the convex portion 21 is the side wall portion of the convex portion 21. It is preferable that the fiber density is higher than 21b (see FIG. 4). Since the convex portion 21 has such a fiber density configuration, when a thermal sensitizer described later is disposed on the top portion 21a, the thermal sensation agent disposed on the skin facing surface side of the top portion 21a falls off. In addition, the warm sensation agent can be distributed in the vicinity of the top portion 21a, so that the wearer's perception of cool feeling can be further suppressed.

The ratio of the density of the side wall portion 21b of the convex portion 21 to the fiber density of the constituent fibers at the top portion 21a of the convex portion 21 is preferably 0.15 or more, more preferably 0.2 or more, and 0 0.9 or less is preferable, and 0.8 or less is more preferable. Fiber density of the fibers constituting the top portion 21a of the concrete projecting portion 21 is preferably 90 present / mm ² or more, still more preferably 100 / mm ² or more, and 200 present / mm ² or less It is preferable that it is 180 / mm ² or less. Similarly, fiber density of the fibers constituting the side wall portion 21b of the protrusion 21 is preferably 30 present / mm ² or more, more preferably 40 present / mm ² or more, and 80 present / mm ² preferably less, further preferably 70 yarns / mm ² or less. The method for measuring the fiber density is as follows.

[Measurement method of fiber density]
The nonwoven fabric used as a sample is cut along the thickness direction Z using a feather razor (product number FAS-10, manufactured by Feather Safety Razor Co., Ltd.). The fiber density at the top portion 21a is obtained by magnifying the upper portion including the top portion 21a using a scanning electron microscope when the cut surface of the nonwoven fabric is divided into three equal parts in the thickness direction Z (fiber cross section is about 30 to 60). The magnification is adjusted to a measurable magnification (150 to 500 times), and the number of cross sections of the fibers cut by the cut surface per fixed area (about 0.5 mm ² ) is counted. Then converted into the number of cross sections of fibers per 1 mm ^2, which is the fiber density in the top 21a. The measurement is performed at three locations, and the average is the fiber density of the sample. Similarly, the fiber density of the side wall part 21b is obtained by measuring the central part when it is equally divided into three in the thickness direction Z of the cut surface of the nonwoven fabric. Note that JCM-5100 (trade name) manufactured by JEOL Ltd. is used as the scanning electron microscope.

  In the surface sheet 2 described above, when performing uneven shape forming for forming the uneven shape, groove forming for forming the groove shape, etc., for example, embossing or complementary to the desired shape forming It can be carried out by pressing a metal mold or the like to form.

  The height H1 of the convex portion 21 (see FIG. 2A) is preferably 0.5 mm or more from the viewpoint of improving the feel of the convex portion 21 and effectively expressing the effect of the warming agent described later. More preferably, it is 1 mm or more, preferably 8 mm or less, more preferably 5 mm or less, preferably 0.5 mm or more and 8 mm or less, more preferably 1 mm or more and 5 mm or less. The height H <b> 1 of the convex portion 21 is a distance between the surface of the top sheet 2 that forms the concave portion 22 and the top surface of the top portion of the convex portion 21.

  The height H1 of the convex portion 21 can be measured as follows. That is, the sample is cut with a sharp razor, the cut end face is observed, and the shortest distance between the surface forming the concave portion 22 and the top surface of the top of each convex portion 21 is measured. Let the obtained value be the height of each convex part. When it is difficult to measure with the naked eye, the section of the cut sample may be measured by observing at a magnification of 20 to 100 times using, for example, a microscope (VHX-1000 manufactured by KEYENCE).

  From the viewpoint of improving the feel of the convex portion 21, the total width W1 of the convex portion 21 in the width direction Y (see FIG. 2A) is preferably 1 mm or more, more preferably 1.5 mm or more, and preferably It is 20 mm or less, More preferably, it is 15 mm or less, Preferably it is 1 mm or more and 20 mm or less, More preferably, it is 1.5 mm or more and 15 mm or less.

  Further, the total width W2 of the recess 22 in the width direction Y (see FIG. 2A) is preferably 1 mm or more, more preferably 1.5 mm or more, and preferably 20 mm or less, more preferably 15 mm or less, Moreover, Preferably they are 1 mm or more and 20 mm or less, More preferably, they are 1.5 mm or more and 15 mm or less.

  As the back sheet 3, for example, a liquid-impermeable film, a spunbond / meltblown / spunbond laminated nonwoven fabric, or the like can be used. A plurality of micropores may be provided in a liquid-impermeable film to impart water vapor permeability to the film. For the purpose of further improving the touch of the absorbent article, a sheet having a good texture such as a nonwoven fabric may be laminated on the outer surface of the back sheet 3.

  The absorbent body 4 generally has a vertically long shape having a longitudinal direction corresponding to a direction extending from the wearer's belly side to the back side through the crotch portion and a width direction perpendicular thereto. The absorber 4 includes at least a liquid-retaining absorbent core 4a. The absorbent core 4a includes, for example, a pile of hydrophilic fibers such as cellulose such as pulp, a mixed pile of hydrophilic fibers and an absorbent polymer, an absorbent polymer deposit, and two absorbents. It is composed of a laminated structure in which an absorbent polymer is supported between sheets. The absorbent article of the present invention is provided with an absorbent core 4a that is a mixed fiber of hydrophilic fibers and absorbent polymers, from the viewpoint of eliminating anxiety about urine leakage and enhancing comfort during wearing. preferable.

  The absorbent core 4a may have at least the skin facing surface covered with a liquid-permeable core wrap sheet 4b, and includes the skin facing surface and the non-skin facing surface of the absorbent core 4a as shown in FIG. The entire surface may be covered with the core wrap sheet 4b. As the core wrap sheet 4b, for example, a thin paper made of hydrophilic fibers, the liquid-permeable nonwoven fabric described above, or the like can be used.

  When the absorbent core 4a includes hydrophilic fibers and an absorbent polymer, the absorbent body 4 may be formed by unevenly distributing the amount of the absorbent polymer. Specifically, when the mass ratio of the absorbent polymer to the total mass of the hydrophilic fibers and the absorbent polymer constituting the absorbent core 4a is the average mass ratio of the absorbent polymer, the absorbent core 4a is: In the cross-sectional view, there are a polymer rich region in which the mass ratio of the absorbent polymer is higher than the average mass ratio of the absorbent polymer, and a fiber rich region in which the mass ratio of the absorbent polymer is lower than the average mass ratio of the absorbent polymer. It is preferable. For example, when one absorbent body 4 is virtually divided into two in the thickness direction, the absorptivity existing in the lower layer portion when the skin facing surface side is the upper layer portion and the non-skin facing surface side is the lower layer portion The amount of polymer can be greater or less than the amount of absorbent polymer present in the upper layer. Moreover, as another example, as the absorbent body 4 in the absorbent article 1, an absorbent body laminate including an upper layer absorbent body positioned on the skin facing surface side and a lower layer absorbent body positioned on the non-skin facing surface side. Further, it may be formed so that an absorbent polymer is present in the upper layer absorber or the lower layer absorber.

  Among the above-mentioned aspects, it is preferable that the absorbent polymer contained in the absorbent body 4 is unevenly distributed on the non-skin facing surface side of the absorbent body 4. That is, in a cross-sectional view of the absorbent body 4, it is preferable that the fiber rich region is disposed on the skin facing surface side and the polymer rich region is disposed on the non-skin facing surface side. In particular, the polymer-rich region and the fiber-rich region are divided in the thickness direction Z of the absorbent body 4, and the polymer-rich region is more preferably arranged on the non-skin facing surface side. In the fiber rich region, an absorbent polymer may or may not exist.

  Since the absorbent body 4 has the above-described configuration, a large amount of free water derived from excretion fluid is likely to be present on the skin-facing surface side of the absorbent body, so that the warming sensation described later can easily spread beyond the urination section. The effect of the warming sensate can be caused to act in a wide area other than the urination part in the absorbent article. As a result, it is possible to effectively suppress the wearer's cold perception.

  The absorber 4 has a recessed portion 5 that is recessed from the skin facing surface side toward the non-skin facing surface side. As shown in FIG. 1, the recessed part 5 is formed in the skin opposing surface side of the absorptive core 4a. Moreover, the recessed part 5 may be formed only in the absorptive core 4a, as shown in the figure, and the absorptive core 4a and the core wrap sheet | seat 4b may be both recessed and formed. The recessed portion 5 is formed singly or in a plurality so as to extend in the longitudinal direction of the absorbent body 4. When a plurality of the recessed portions 5 are formed, the recessed portions 5 are arranged side by side in the width direction Y. In the present embodiment, the longitudinal direction of the absorbent body 4 and the longitudinal direction of the absorbent article 1 coincide with each other. Moreover, the convex part 21 and the recessed part 22 which exist in the surface sheet 2, and the recessed part 5 in the absorber 4 may be formed so that a position and a pitch may become the same, and may be formed so that it may overlap, Each may be formed differently.

  Since the absorbent body 4 has such a recessed portion 5, it promotes the diffusion of free water derived from the excretory fluid and acts on the region where the warming agent described later is not disposed. Therefore, a wearer's cold sense perception can be suppressed effectively. In addition, even when a warming sensation is placed in a region other than the excretory part that is sensitive to stimulation, the excessive excretion to the excretion part by the warming sensation is suppressed by diffusion of free water derived from the excretion liquid, while the excretion part is Also, a warming sensation agent can be applied, and as a result, the wearer's cold sensation can be more effectively suppressed.

  The number of the recessed portions 5 formed in the absorbent body 4 is preferably 1 or more, more preferably 2 or more, more preferably 100 or less, and even more preferably 50 or less. The number of the recessed portions 5 formed in the absorbent body 4 is preferably 1 or more and 100 or less, and more preferably 2 or more and 50 or less. The number of the recessed portions 5 is defined as the number of the recessed portions 5 when the virtual straight line is drawn in the width direction Y and the number of the recessed portions 5 intersecting the virtual straight line is defined. In the case where the number of the recessed portions 5 differs depending on the position where the virtual straight line is drawn, the maximum number of these numbers is defined as the number of the recessed portions 5. Thus, by having the recessed part 5, the bodily fluids such as excreted urine can be diffused throughout the absorbent article, and the warming sensation described later can be diffused together. The wearer of the property article can perceive a warm feeling efficiently.

  In addition to the recessed part 5 mentioned above, the absorber 4 may further have the 2nd recessed part recessed from the non-skin opposing surface side toward the skin opposing surface side. The 2nd recessed part is formed in the non-skin opposing surface side of the absorptive core 4a. The positions of the recessed part 5 and the second recessed part may overlap in the thickness direction or may not overlap. In addition, the description of the recessed part 5 mentioned above is applied suitably for the other description regarding a 2nd recessed part.

  As a result of intensive studies to solve the problems of the prior art, the present inventor has arranged a warming sensation on the absorbent article in a specific member and region, so that even after urinary fluid excretion, the wearer It was found that the perception of cold feeling can be suppressed.

  As described above, the absorbent article of the present invention includes a warming agent. The warming agent in this specification is an agent containing a compound that causes the wearer to perceive warmth when the warming agent comes into contact with the skin of the wearer.

  The warming agent may be disposed on the surface sheet, may be disposed between the surface sheet and the absorber, or may be disposed in combination thereof. In detail, as shown to Fig.2 (a) and FIG.3 (a), the warming sensation agent 6 may be distribute | arranged only to the skin opposing surface side of the surface sheet 2, FIG.2 (b) and FIG. As shown to 3 (b), you may distribute | arrange only between the surface sheet 2 and the core wrap sheet | seat 4b in the absorber 4. FIG.

  Moreover, as shown in FIG.2 (c), the warming agent 6 is distribute | arranged to the skin opposing surface side of the surface sheet 2, and is distribute | arranged between the core sheet | seat 4b in the surface sheet 2 and the absorber 4. As shown in FIG. As shown in FIG. 2 (d), the warming sensation agent 6 (first warming sensation agent 6 </ b> A) disposed on the top sheet, and between the top sheet 2 and the core wrap sheet 4 b in the absorbent body 4. The warming sensation agent 6 (second warming sensation agent 6B) disposed on the surface sheet 2 may be disposed at a different position in the planar direction of the topsheet 2. In the embodiment shown in FIG. 2 (d), the first warming agent 6 </ b> A is disposed on the convex portion 21 and the second warming agent 6 </ b> B is disposed on the concave portion 22, and the top sheet 2 is viewed from above. Sometimes, each warming sensation agent 6A, 6B is arranged so as not to overlap each other. In addition to these, the thermal sensitizers 6A and 6B may be arranged in different regions in the absorbent article so that the thermal sensitizers 6A and 6B do not overlap each other. For example, by disposing the first warming agent 6A on the crotch part and the second warming agent 6B on the abdomen and the dorsal part, the warming agents 6A and 6B do not overlap each other. It may be arranged.

  From the viewpoint of allowing the wearer to perceive a warm sensation caused by a warm sensation agent at an appropriate timing such as during body fluid excretion, as shown in FIGS. 2 (a), (c) and (d) and FIG. 3 (a), It is preferable that the warming sensation agent 6 (first warming sensation agent 6A) disposed on the skin facing surface side of the topsheet 2 is encapsulated in a water-disintegrating microcapsule. Water disintegration means that the shape held at the time of drying easily collapses by contacting with water or an aqueous solution such as a body fluid. That is, the water-disintegratable microcapsule according to the present invention is capable of releasing the warming sensate contained in the capsule when the capsule comes into contact with moisture. By having such a configuration, the warm sensation agent can be acted on at a desired timing such as during body fluid excretion to effectively suppress the wearer's cold perception, and as a result, when worn Comfort can be improved.

  When the warming agent is encapsulated in a water-disintegrating microcapsule, the release mechanism of the warming agent in the capsule includes, for example, a mechanism in which the capsule absorbs water in excrement and dissolves or disintegrates, A mechanism known in the art, such as a mechanism that swells by absorbing moisture in the excrement and pores that can release the warming sensation open in the capsule, can be employed. From the viewpoint of further increasing the release of the warming agent, in addition to the above-described mechanism, the capsule dissolves or disintegrates due to the heat of the excrement, and the pH of the excretory fluid etc. You may employ | adopt the mechanism in which melt | dissolves or disintegrates.

  As a microcapsule material that exhibits such a mechanism, a material known in the art can be used. Examples of the material of the microcapsule in the present invention include monosaccharides such as glucose, disaccharides such as sucrose, dextrin, glucomannan, sodium alginate, polysaccharides such as water-soluble starch, water-soluble substances such as polyvinyl alcohol and polyvinyl acetate. And polymers, gelatin and the like.

  It is preferable that the warm sensation agent 6 is disposed in the excretion part facing part of the absorbent article 1 from the viewpoint of quickly expressing the warm sensation resulting from the warm sensation at an appropriate timing such as during body fluid excretion. In this case, the warming sensation agent arranged in the excretion part facing part is, for example, as shown in FIGS. 2 (a) and 3 (a), as the first warming sensation 6A, on the skin facing surface side of the topsheet 2. Further, as shown in FIGS. 2 (b) and 3 (b), the second warming sensation agent 6B may be disposed between the top sheet 2 and the absorber 4 as shown in FIGS. The warming agents 6A and 6B may be arranged in the above combination. In particular, when the warming sensation agent 6 (second warming sensation agent 6B) is disposed between the topsheet 2 and the absorbent body 4 in the excretion part-facing portion of the absorbent article 1, immediately after excretion of body fluid such as urine. Not only after a certain period of time has passed since excretion, the warming sensate can act in a wide range of areas due to the diffusion of free water in the absorber. Since a wearer can perceive a feeling, it is still more preferable. When the warming sensation 6 is arranged in the excretion part facing part of the absorbent article 1, the warming sensation 6 may be further arranged in an area other than the excretion part facing part. It does not have to be arranged.

  From the viewpoint of suppressing excessive stimulation of the warming sensation to the excretion part of the wearer, the warming sensation 6 may be arranged in a region other than the excretion part facing part in the absorbent article 1. In this case, the warming sensation agent 6 may be further arranged in the excretion part facing part, and may not be arranged in the excretion part facing part. In particular, from the viewpoint of further suppressing excessive stimulation of the warming sensation to the excretion part of the wearer, the warming sensation 6 disposed in the absorbent article is disposed in the excretion part facing part of the absorbent article 1. However, it is preferable that the absorbent article 1 is disposed on at least one of the crotch part, the abdominal side part, and the back side part other than the excretion part facing part. As shown in FIGS. 2A and 3A, for example, the warming sensation agent arranged in the region other than the excretion part facing part is the skin facing surface side of the topsheet 2 as the first warming sensation 6A. Further, as shown in FIGS. 2 (b) and 3 (b), the second warming sensation agent 6B may be disposed between the top sheet 2 and the absorber 4 as shown in FIGS. The warming agents 6A and 6B may be arranged in the above combination.

  In particular, since the absorbent body 4 has the recessed portion 5 extending in the longitudinal direction, even when the warming sensate 6 is disposed in a region other than the excretory portion facing portion of the absorbent article 1, The warming sensation 6 can be diffused through the recessed part 5 into the region where the warming sensation 6 is not disposed, such as the excretion part facing part. As a result, while suppressing excessive stimulation to the excretory part by the warming sensation agent 6, the warming sensation agent 6 can be caused to act in a wide area, and the warmth can be perceived more effectively by the wearer.

  From the viewpoint of effectively expressing the wearer's perception of warmth, as shown in FIGS. 2 (a), (c) and (d), the surface sheet 2 is formed with irregularities or grooving (hereinafter referred to as these). Is also simply referred to as “unevenness shaping”.), It is preferable that the warming agent 6 is disposed on the top of the convex portion 21 on the skin facing surface side of the topsheet 2. As shown in the figure, it is also preferable that the warming sensate 6 is attached to the convex portion 21 with a certain spread around the top of the convex portion 21.

  The warming agent used in the present invention is combined with a sensory receptor that perceives warmth in order to make the wearer perceive warmth more effectively and suppress the perception of the coolness of the wearer. An agent containing a compound is preferable. Such sensory receptors are preferably compounds that bind to at least one of TRPV1 receptor and TRPV3 receptor.

  Examples of the warming agent used in the present invention include compounds having a 4-hydroxy-3-methoxyphenyl group in the chemical structure such as gingerol, shogaol, gingerone, eugerol and vanillyl butyl ether, and a vanillylamide group such as capsaicin. Compounds such as piperine, sanshool, 1,4-cineole, 1,8-cineole, caffeine, and tocopherol nicotinate are included in the structure. These compounds may be contained alone or in combination. These compounds may be dispersed or dissolved in a solvent such as water or ethanol, or may be in a dry state such as a granular or powdery body.

  Moreover, you may use the extract of the herbal medicine containing the above-mentioned compound as a warming agent. When using a herbal extract as a warming agent, the extract may be dispersed or dissolved in a solvent, or may be in a dry state such as a granular or powdery form. As the solvent used for extraction, for example, water, an organic solvent such as ethanol, or a mixed solvent thereof can be used. Examples of herbal extracts used as warming agents include ginger tincture, ginger extract, red pepper tincture, red pepper extract, salamander extract, sage extract and the like.

  In the case where the above-described warming sensation agent is encapsulated in a water-disintegrating microcapsule, the warming sensation agent and the solvent are added so that the water-disintegrating microcapsule does not disintegrate in the absence of an aqueous solution such as water and body fluid. It is preferable to select appropriately. Examples of such a combination include an embodiment in which a warming agent in a dry state (solvent-free) is encapsulated in a water-disintegrating microcapsule.

  In addition to the above-described topsheet, backsheet and absorbent body, the absorbent article is along the longitudinal direction on both sides along the longitudinal direction of the absorbent article on the skin-facing surface side according to the specific application of the absorbent article. A leak-proof cuff that extends may be placed. Leak-proof cuffs generally have a proximal end and a free end. The leak-proof cuff has a proximal end portion on the skin facing surface side of the absorbent article, and stands up from the skin facing surface side. The leak-proof cuff is made of a liquid-resistant or water-repellent and breathable material. An elastic member made of rubber thread or the like may be disposed in an extended state at or near the free end of the leak-proof cuff. When the elastic member contracts in the wearing state of the absorbent article, the leak-proof cuff comes to stand up toward the wearer's body, and the liquid excreted on the top sheet is transferred to the top sheet and absorbs Leaking outward in the width direction of the article is effectively prevented.

  The absorbent article may further have an adhesive part on the non-skin facing surface of the back sheet. The pressure-sensitive adhesive portion is used for fixing the absorbent article to an undergarment or another absorbent article in a worn state of the absorbent article, and preventing displacement at the time of wearing.

  The absorbent article may contain a fragrance. The fragrance is not particularly limited as long as the fragrance component is volatilized in the atmosphere at atmospheric pressure, and it is preferable that the fragrance can be perceived in an environment of normal temperature and pressure. By using such a fragrance, an unpleasant odor caused by excrement such as urine and menstrual blood can be masked by the fragrance of the fragrance.

  The above is a description of the absorbent article of the present invention. In the following, taking the embodiment shown in FIGS. 2 (a), (b) and (d) as an example, suitable topsheets used in these embodiments will be described. The manufacturing method will be described with reference to the manufacturing apparatus 100 shown in FIG. The present manufacturing method includes a step of joining the first and second nonwoven fabrics by pressing with a heat roll or the like under a state in which the first nonwoven fabric and the second nonwoven fabric subjected to uneven shaping are superimposed. In addition, it is roughly divided into a step of applying the warming sensate encapsulated in the water-disintegrating capsule to the top of the convex portion formed in the first nonwoven fabric and the vicinity thereof. Each step will be described below.

  As shown in FIG. 5 (a), the second roll 112 and the first heat have a shape that meshes with the concave and convex shape of the first roll with respect to the peripheral surface of the first roll 111 whose peripheral surface has a concave and convex shape. A roll 113 and a second heat roll 114 are arranged to face each other. The second roll 112, the first heat roll 113, and the second heat roll 114 are arranged in this order from the upstream side in the rotation direction R of the first roll 111 toward the downstream side. Details of the first roll 111 and the second roll 112 will be described later. The 1st heat roll 113 and the 2nd heat roll 114 are flat rolls which do not have unevenness in a peripheral surface, respectively.

First, as shown to Fig.5 (a), the 1st nonwoven fabric 2f is drawn | fed out from the raw fabric roll (not shown) of the 1st nonwoven fabric 2f (henceforth "the 1st nonwoven fabric 2f" only). Separately, the second nonwoven fabric 2g is fed out from a raw fabric roll (not shown) of the second nonwoven fabric 2g (hereinafter also simply referred to as “second nonwoven fabric 2g”). And as shown in the figure, the drawn-out 1st nonwoven fabric 2f is made to bite into the meshing part of the 1st roll 111 and the 2nd roll 112, and the 1st nonwoven fabric 2f is unevenly shaped. At this time, it is preferable that the first roll 111 is sucked from the peripheral surface toward the inside of the roll to promote the uneven shaping of the first nonwoven fabric 2f.
Each of the first nonwoven fabric 2f and the second nonwoven fabric 2g is a continuous body of strip-shaped nonwoven fabric. The first nonwoven fabric 2 f becomes the upper nonwoven fabric 2 b of the top sheet 2, and the second nonwoven fabric 2 g becomes the lower layer nonwoven fabric 2 a of the top sheet 2.

  Next, the second nonwoven fabric 2g is overlapped while the first nonwoven fabric 2f is continuously sucked to the peripheral surface of the first roll 111 and the shaped state is maintained, and the superposed surface is smoothed with the first roll 111. The first heat roll 113 is clamped under heating. At this time, both the first roll 111 and the first heat roll 113 or only the first heat roll 113 are heated to a predetermined temperature. Thereby, the 1st nonwoven fabric 2f and the 2nd nonwoven fabric 2g which are located on the convex part 111a in the 1st roll 111 are joined by heat sealing | fusion.

  Subsequently, the laminated nonwoven fabric 2S of the first nonwoven fabric 2f and the second nonwoven fabric 2g joined together by thermal fusion (hereinafter, also simply referred to as the laminated nonwoven fabric 2S) was continuously sucked and held on the peripheral surface of the first roll 111. The laminated nonwoven fabric 2S is clamped between the first roll 111 and the second heat roll 114 having a smooth circumferential surface. At this time, both the first roll 111 and the second heat roll 114 or only the second heat roll 114 are heated to a predetermined temperature. Thereby, the 1st nonwoven fabric 2f and the 2nd nonwoven fabric 2g are further joined by heat sealing | fusion. In this way, the laminated nonwoven fabric 2S having a two-layer structure subjected to uneven shaping or the like is continuously manufactured.

  Then, as shown in FIG.5 (b), the warming agent 6 (henceforth, hereinafter) included in the top part of the convex part formed in the 1st nonwoven fabric 2f in lamination nonwoven fabric 2S, and its neighborhood in the water disintegration capsule. The capsule-type warming agent 6 is also applied. As shown in FIG. 5 (b), the mixture of the capsule-type warming agent 6 and the adhesive is supplied from the warming agent supply unit 120 to the peripheral surface of the warming agent supply roll 130. Apply continuously. In this state, while conveying the laminated nonwoven fabric 2S in the conveyance direction MD, the peripheral surface of the warming agent supply roll 130 and the top of the convex portion formed on the first nonwoven fabric 2f in the laminated nonwoven fabric 2S are brought into contact with each other, The mold temperature sensitizer 6 is applied. In this way, the warming sensation agent 6 encapsulated in the water-disintegrating capsule is applied to the convex portion 2T in the laminated nonwoven fabric 2S. Note that the mixture of the capsule-type warming sensation 6 and the adhesive that has not been applied is removed by the removing member 140 such as a scraper as the warming sensation supply roll 130 rotates. The removal member 140 is a substantially plate-like member extending along the axial direction of the warming agent supply roll 130, and is arranged so that the edge thereof is in contact with the peripheral surface of the roll 130.

  Finally, the laminated nonwoven fabric 2S coated with the above-described warming sensate is supplied to the manufacturing process of absorbent articles such as incontinence pads and diapers to obtain the top sheet 2 of the absorbent article 1. Since the laminated nonwoven fabric 2S and the topsheet 2 are substantially the same, the convex portion 2T formed on the first nonwoven fabric 2f and the convex portion 21 in the topsheet 2 are substantially the same. Further, the region where the first nonwoven fabric 2 f and the second nonwoven fabric 2 g are joined becomes the recess 22 in the topsheet 2. In this way, the surface sheet 2 having a two-layer structure subjected to uneven shaping or the like is manufactured in a state where the capsule-type warming agent 6 is arranged on the convex portion 21.

  The adhesive used for the application of the capsule-type warming agent 6 has an adhesive property or tackiness in the absence of moisture, and has a property of losing adhesiveness or tackiness in the presence of moisture. preferable. Examples of the adhesive having such properties include water-soluble adhesives such as starch, polyvinyl alcohol (PVA), and sugars.

  In the manufacture of the embodiment shown in FIG. 2 (c) and FIG. 2 (d), in addition to the capsule-type warming agent 6 (corresponding to the first warming agent 6A in the same figure), the lower layer in the topsheet 2 It is preferable to apply the second warming agent 6B continuously or intermittently to the non-skin facing surface of the nonwoven fabric 2a or the skin facing surface of the absorbent body 4. In addition, the coating of the second warming agent 6B on the topsheet 2 may be performed in the state of the laminated nonwoven fabric 2S, or may be performed after the topsheet 2 is formed. It doesn't matter before and after coating. Examples of the coating method of the second warming agent 6B include spraying or coating by spraying, coating by a die coater or the like, coating by a gravure method or a flexo method, and the like.

  In the manufacture of the embodiment shown in FIGS. 3A and 3B, the above-described method can be appropriately employed. For example, in the embodiment shown in FIG. 3A, a mixture of the capsule-type warming agent 6 and the adhesive supplied to one surface of the nonwoven fabric constituting the top sheet 2 and the peripheral surface of the warming agent supply roll 130. Can be applied to the skin facing surface of the top sheet 2. Moreover, in embodiment shown in FIG.3 (b), it is the same method as the coating method of the 2nd warming agent 6B mentioned above, One skin of the nonwoven fabric which comprises the surface sheet 2, or skin facing of the absorber 4 The warming agent 6 can be applied to the surface.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, as a method of applying the capsule-type warming agent, after applying only the adhesive in advance to the area of the surface sheet where the capsule-type warming agent is to be applied, the capsule-type warming agent is sprayed on the coated surface. Can be applied.

  Moreover, although embodiment in the surface sheet 2 of the laminated structure shown to FIG. 2 (a) thru | or (d) was demonstrated as the above-mentioned manufacturing method, it is not restricted to the said embodiment, Even if it uses the single-layer surface sheet 2 Good. In the case where the topsheet 2 is a single layer, it is preferable that the projections and depressions are shaped and the projections are hollow from the viewpoint of flexibility.

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Top sheet 21 Convex part of top sheet 22 Concave part of top sheet 25 Hollow area 3 Back sheet 4 Absorber 5 Concave part 6 Warmth agent 100 Manufacturing apparatus 120 Warmth agent supply part 130 Warmth agent supply roll 140 Removal member 2S Laminated nonwoven fabric 2T Convex portion of laminated nonwoven fabric MD Conveying direction

Claims (10)

It has a top sheet located on the skin facing surface side, a back sheet located on the non-skin facing surface side, and an absorbent body interposed between both sheets, and extends from the wearer's stomach side to the back side via the crotch part. An absorbent article having a longitudinal direction and a width direction orthogonal to the longitudinal direction,
The absorber has a recess extending in the longitudinal direction on the skin facing surface side,
A warming agent is disposed on the skin facing surface side of the top sheet,
An absorbent article in which the warming agent is encapsulated in a water-disintegrating capsule. A top sheet positioned on the skin facing surface side, a back sheet positioned on the non-skin facing surface side, and an absorbent body interposed between the two sheets, and extends from the wearer's stomach side to the back side through the crotch portion An absorbent article having a longitudinal direction and a width direction orthogonal to the longitudinal direction,
The absorber has a recess extending in the longitudinal direction on the skin facing surface side,
An absorptive article in which a warming sensation agent is arranged between the surface sheet and the absorber. It has a top sheet located on the skin facing surface side, a back sheet located on the non-skin facing surface side, and an absorbent body interposed between both sheets, and extends from the wearer's stomach side to the back side via the crotch part. An absorbent article having a longitudinal direction and a width direction orthogonal to the longitudinal direction,
The absorber has a recess extending in the longitudinal direction on the skin facing surface side,
The first warming agent is disposed on the skin-facing surface side of the top sheet, the first warming agent is encapsulated in a water-disintegrating capsule, and
An absorbent article in which a second warming agent is disposed between the top sheet and the absorber.   The absorptive article according to claim 3 in which said 1st warming agent and said 2nd warming agent are distribute | arranged to the position where the planar direction of said surface sheet differs. Comprising a crotch part arranged in the crotch part,
The crotch part has an excretion part facing part disposed to face the excretion part of the wearer,
The absorptive article according to claim 3 or 4 with which at least one of said 1st warming agent and said 2nd warming agent is distribute | arranged to said excretion part opposing part. A crotch part arranged in the crotch part, and a ventral part and a dorsal part extending in front and rear of the crotch part,
The crotch part has an excretion part facing part disposed to face the excretion part of the wearer,
At least one of the first warming agent and the second warming agent is disposed on at least one of the crotch part other than the excretion part facing part, the abdominal side part, and the back side part, The absorbent article according to claim 3 or 4.   The said surface sheet is an absorbent article as described in any one of Claims 1 thru | or 6 which has the some convex part protruded toward the wearer's skin side. The surface sheet has a plurality of convex portions projecting toward the wearer's skin side,
The absorbent article as described in any one of Claim 1, 3 thru | or 6 with which the said warming sensation or the said 1st warming sensation is distribute | arranged to the top part of the said convex part. The absorber includes a fiber and an absorbent polymer,
The absorbent body has a mass of the absorbent polymer when the mass ratio of the absorbent polymer to the total mass of the mass of the fiber and the absorbent polymer is an average mass ratio of the absorbent polymer in a cross-sectional view. A polymer-rich region having a ratio higher than the average mass ratio, and a fiber-rich region in which the mass ratio of the absorbent polymer is lower than the average mass ratio;
The absorbent article according to any one of claims 1 to 8, wherein the polymer-rich region is disposed on the non-skin facing surface side. The absorber comprises an upper layer absorber positioned on the skin facing surface side and a lower layer absorber positioned on the non-skin facing surface side,
The absorbent article as described in any one of Claims 1 thru | or 9 in which an absorptive polymer exists only in the said lower layer absorber.

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