JP2020005666A - Absorbent article package - Google Patents

Abstract

Provided is an absorbent article package that can appropriately perform welding of a packaging material. An absorbent article (1) and a packaging material (20) for packaging the absorbent article (1), wherein the packaging material (20) has at least a first layer 20a, a second layer 20b, And an intermediate layer 20c located between the first layer 20a and the second layer 20b, wherein the packaging material (20) is folded along a folding line direction of the packaging material (20), An absorbent article package (50) in which the absorbent article (1) is packaged, and an end (20e) of the packaging material (20) in the folding line direction is welded, The package for an absorbent article (50), wherein the thickness of the packaging material (20) is 4 μm or more and less than 20 μm. [Selection diagram] FIG.

Description

  The present invention relates to an absorbent article package.

  Examples of absorbent articles include sanitary napkins, panty liners, and absorbent pads. As in Patent Literature 1, for example, it is known that an absorbent article has a volatile substance such as a substance that gives a feeling of cooling the skin. Patent Document 1 discloses that an absorbent article is wrapped and sealed using a wrapping material that does not reduce the amount of volatile substances, and the wrapping material is about 0.020 to about 1 It is a multilayer material having a thickness of 0.0 mm and a barrier layer for preventing volatile substances from volatilizing.

Table 2007-525245

  However, in the packaging of absorbent articles, the number of partially overlapped packaging materials may differ depending on the folding method and the packaging method. For example, when sealing the packaging material by welding, since heat and pressure are applied uniformly to the welding location, there is a possibility that the welding may be excessively performed or the welding may be insufficient depending on the number of stacked packaging materials. Was.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an absorbent article package that can appropriately perform welding of a packaging material.

A main invention for achieving the above object includes an absorbent article and a packaging material for packaging the absorbent article, wherein the packaging material has at least a first layer, a second layer, and the first layer and the first layer. An intermediate layer positioned between the second layers, wherein the packaging material is folded along a folding line direction of the packaging material, and the absorbent article is packaged; An absorbent article package in which an end of the material in the folding line direction is welded, wherein the thickness of the packaging material is 4 μm or more and less than 20 μm. .
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, by setting the thickness of the packaging material to 4 μm or more and less than 20 μm, it becomes easier to apply heat and pressure evenly to the welding location than when using a packaging material having a thickness of 20 μm or more, Damage due to welding of materials is reduced, and it is easier to join more reliably.

FIG. 1 is a plan view of the package 50 in an unfolded state as viewed from the skin side. FIG. 2 is a plan view of the package 50 in the unfolded state as viewed from the non-skin side. FIG. 3A is a plan view of the package body 50 in the package state as viewed from the tape member 21 side. FIG. 3B is a plan view of the package 50 in a packaged state as viewed from a surface opposite to the tape member 21 side. FIG. 4 is a plan view of the napkin 1 viewed from the skin side. FIG. 5 is a plan view of the napkin 1 viewed from the non-skin side. FIG. 6 is a schematic cross-sectional view of the napkin 1 as viewed in the direction of arrows AA in FIG. FIG. 7 is a diagram illustrating an application region of the cooling sensation material. FIG. 8 is a diagram illustrating a cross section of the packaging material 20 in FIG. FIG. 9 is a view for explaining welding when a conventional packaging material 200 is used. FIG. 10 is a diagram illustrating welding when the packaging material 20 is used. FIG. 11 is a diagram illustrating the separation force at the first welded portion Wx, the second welded portion Wy2, and the third welded portion Wy3 of the package 50. FIG. 12 is a diagram illustrating the separation force at the first welded portion Wx and the third welded portion Wy3 of the package 500. FIG. 13 is an enlarged view of a portion Z in FIG. 3A. FIG. 14 is a diagram illustrating a cross section of a packaging material 20 according to another embodiment.

At least the following matters will be made clear by the description in the present specification and the accompanying drawings.
An absorbent article and a packaging material for packaging the absorbent article, wherein the packaging material includes at least a first layer, a second layer, and an intermediate layer located between the first layer and the second layer. The packaging material is folded along the folding line direction of the packaging material, so that the absorbent article is packaged, and the end of the packaging material in the folding line direction is welded. An absorbent article package according to claim 1, wherein said packaging material has a thickness of 4 μm or more and less than 20 μm.

  According to such an absorbent article package, by setting the thickness of the packaging material to be 4 μm or more and less than 20 μm, heat and pressure can be evenly applied to the welding location as compared with the case where a packaging material having a thickness of 20 μm or more is used. It is easy to add, and it is easy to reduce breakage due to welding of the packaging material or to make it more surely joined.

  In such an absorbent article package, the absorbent article desirably has a volatile substance.

  According to such an absorbent article package, the possibility that the volatile substance is volatilized by the packaging material can be reduced, so that the wearer can easily feel the effect of the volatile substance when worn.

  In such an absorbent article package, the intermediate layer is a protective layer for preventing volatilization of the volatile substance, and at least one of the first layer and the second layer is provided on the intermediate layer. It is desirable to have an adhesive adhesive substance that can be adhered.

  According to such an absorbent article package, one layer and the intermediate layer can be bonded without using an adhesive, so that the packaging material can be formed thinner.

  In such an absorbent article package, it is preferable that, of the one layer, the surface on the side opposite to the intermediate layer has less adhesive substance than the surface on the intermediate layer side.

  According to such an absorbent article package, the surface on the side opposite to the intermediate layer is a surface that is often welded during welding of the packaging material, so that the amount of the adhesive substance is smaller than that of the surface on the intermediate layer side. Thus, the amount of the welding substance can be increased, and the welding can be easily strengthened.

  In such an absorbent article package, it is preferable that a portion corresponding to the end portion of the one layer includes the adhesive substance.

  According to such an absorbent article package, the absorbent article package can be more firmly packed by welding with the welding substance and bonding with the adhesive substance.

  In such an absorbent article package, the intermediate layer is a protective layer for preventing volatilization of the volatile substance, and at least one of the first layer and the second layer, and the intermediate layer It is desirable that they are adhered by an adhesive.

  According to such an absorbent article package, heat and pressure can be easily applied evenly to the welded portion, so that damage due to welding of the packaging material can be reduced, or bonding can be more reliably performed.

  In such an absorbent article package, it is preferable that the intermediate layer is a protective layer for preventing the volatile substance from volatilizing, and the thickness of the one layer is larger than the thickness of the intermediate layer.

  According to such an absorbent article package, one layer is more likely to have more welding substance than when the thickness of one layer is smaller than the thickness of the intermediate layer, so that the welding of the packaging material is more firmly performed. It becomes easy to do.

  In such an absorbent article package, in the packaged state, the package has a thickness direction, the packaging material is folded a plurality of times, and in the thickness direction, the two packaging materials are stacked. A double part and a triple part in which three parts are overlapped are provided, and in use, the side where the part to be firstly deployed is located on the upper side, and the packaging materials at the ends in the double part are connected to each other. When the portion where the packaging materials are welded to each other at the ends of the triple portion is referred to as a second welded portion and a third welded portion in order from the upper side, the third welded portion is referred to as a third welded portion. The force for separating the welding between the packaging materials at the welding portion is stronger than the force for separating the welding between the packaging materials at the second welding portion, and the force for separating the welding between the packaging materials at the third welding portion. And the front of the first welded portion The difference between the force to separate the welding of packaging material to each other may be smaller than 0.1 N.

  According to such an absorbent article package, since the wearer can open the absorbent article package with a certain force, the opening operation can be easily performed.

  In such an absorbent article package, in the packaged state, the package has a thickness direction, the packaging material is folded a plurality of times, and in the thickness direction, the two packaging materials are stacked. A double part and a triple part in which three parts are overlapped are provided, and in use, the side where the part to be firstly deployed is located on the upper side, and the packaging materials at the ends of the double part are connected to each other. If the portion where the packaging materials are welded to each other at the end of the triple portion is referred to as a second welded portion and a third welded portion in order from the upper side, the first welded portion is defined as the first welded portion. It is preferable that the force for separating the welding of the packaging materials at the welding portion, the second welding portion, and the third welding portion is less than 1.2 N, respectively.

  According to such an absorbent article package, the wearer can open the absorbent article package with a smaller force.

  In such an absorbent article package, in the packaged state, the package has a thickness direction, the packaging material is folded a plurality of times, and in the thickness direction, the two packaging materials are stacked. A double part and a triple part in which three parts are overlapped are provided, and in use, the side where the part to be firstly deployed is located on the upper side, and the packaging materials at the ends in the double part are connected to each other. When the portion where the packaging materials are welded to each other at the ends of the triple portion is referred to as a second welded portion and a third welded portion in order from the upper side, the third welded portion is referred to as a third welded portion. The difference between the force for separating the welding between the packaging materials at the welding portion and the force for separating the welding between the packaging materials at the first welding portion separates the welding between the packaging materials at the first welding portion. Desirably less than 1/2 of force There.

  According to such an absorbent article package, the difference between the force for separating the welding between the packaging materials in the third welding portion and the force for separating the welding between the packaging materials in the first welding portion is the first welding portion. Since the wearer can open the absorbent article package with a certain force, as compared with the case where the force for separating the welding between the packaging materials in the above is larger than １ ／, the opening operation can be easily performed. .

  In such an absorbent article package, a difference between a force for separating the welding between the packaging materials in the third welding portion and a force for separating the welding between the packaging materials in the first welding portion is the second difference. It is desirable that it is smaller than 1/3 of the force for separating the welding of the packaging materials at one welding portion.

  According to such an absorbent article package, the difference between the force for separating the welding between the packaging materials in the third welding portion and the force for separating the welding between the packaging materials in the first welding portion is the first welding portion. Since the wearer can open the absorbent article package with a certain force, as compared with a case where the force is larger than 1/3 of the force for separating the welding between the packaging materials in the above, the opening operation can be easily performed. .

  In such an absorbent article package, a difference between a force for separating the welding between the packaging materials in the third welding portion and a force for separating the welding between the packaging materials in the first welding portion is the second difference. Desirably, the force is smaller than 1/10 of the force for separating the welding of the packaging materials at one welding portion.

  According to such an absorbent article package, the difference between the force for separating the welding between the packaging materials in the third welding portion and the force for separating the welding between the packaging materials in the first welding portion is the first welding portion. Since the wearer can open the absorbent article package with a certain force, as compared with a case where the force is larger than 1/10 of the force for separating the welding between the packaging materials in the above, the opening operation can be easily performed. .

  In such an absorbent article package, in the packaged state, the package has a thickness direction, the packaging material has a tape member, and the tape member has a peeling part that can be peeled off when opened. A fixing portion fixed to the packaging material, wherein the packaging material is folded plural times, and in the thickness direction, a double portion in which two packaging materials are stacked, and a triple portion in which three packaging materials are stacked. Is provided, at the time of use, the side where the portion to be deployed first is located is the upper side, the portion of the double part where the packaging materials of the ends are welded to each other is a first welded portion, When the portions of the end portions of the triple portion where the packaging materials are welded to each other are sequentially referred to as a second welded portion and a third welded portion from the upper side, a force for separating the welding of the packaging materials at the first welded portion. The packaging materials in the second welded portion Force to separate the welding, and the force to separate the welding between the packaging material in the third weld part is preferably respectively less than the force for peeling the release portion from said packaging material.

  According to such an absorbent article package, the force for separating the welding between the packaging materials in the first welding portion, the force for separating the welding between the packaging materials in the second welding portion, and the packaging material in the third welding portion The absorbent article package can be more easily opened than in the case where the force for separating the welds from each other is greater than the force for peeling the peeling portion from the packaging material.

  In such an absorbent article package, in the packaged state, the package has a thickness direction, the absorbent article includes an adhesive area on a non-skin side, and the packaging material protects the adhesive area. A protective sheet is provided, the packaging material is folded a plurality of times, and in the thickness direction, a double portion in which the two packaging materials are overlapped, and a triple portion in which three packaging materials are overlapped, are provided. At the time of use, the side where the part to be deployed first is located is the upper side, the part of the ends of the double part where the packaging materials are welded to each other is the first welded part, and the end part of the triple part is When the portions where the packaging materials are welded to each other are referred to as a second welding portion and a third welding portion in order from the upper side, a force for separating the welding between the packaging materials in the first welding portion, the second welding portion The welding between the packaging materials at , And the force to separate the welding between the packaging material in the third weld part, it is desirable that each larger than the force to separate the absorbent article from the protective sheet.

  According to such an absorbent article package, the force for separating the welding between the packaging materials in the first welding portion, the force for separating the welding between the packaging materials in the second welding portion, and the packaging material in the third welding portion The strength of the welding can be improved as compared with the case where the force for separating the welding between the pieces is smaller than the force for separating the absorbent article from the packaging material.

  In such an absorbent article package, the absorbent article has a volatile substance, the end portion has a welding area where the packaging materials are welded to each other, and the fold of the welding area is included. The force for separating the welding between the packaging materials at the outer end in the linear direction is preferably larger than the force for separating the welding between the packaging materials at the inner end in the folding line direction in the welding area. .

  According to such an absorbent article package, of the welding area, the inside in the folding line direction can be opened with a weaker force, while the outside in the folding line direction is more strongly welded, so that the volatile It is possible to reduce the risk that the substance is volatilized.

=== First Embodiment ===
Hereinafter, the embodiment will be described by taking a sanitary napkin as an example of an absorbent article according to the present invention, but not limited to a sanitary napkin, such as a panty liner, or a pad for light incontinence, etc. Any absorbent article that is fixed and used may be used.

<<< Basic configuration of package 50 >>>
FIG. 1 is a plan view of a package 50 (also referred to as a “package of a napkin 1” or an “absorbent article package”) 50 viewed from the skin side. FIG. 2 is a plan view of the package 50 in the unfolded state as viewed from the non-skin side. FIG. 3A is a plan view of the package 50 in the packaged state as viewed from the tape member side, and FIG. 3B is a plan view of the package 50 in the packaged state as viewed from the side opposite to the tape member side. The package 50 in the unfolded state and the package 50 in the packaged state have a longitudinal direction, a width direction, and a thickness direction orthogonal to each other. The packaging body 50 includes a sanitary napkin 1 (hereinafter, also referred to as “napkin 1”) and a packaging material for packaging the napkin 1. 3A and 3B, a direction along the folding lines F1 and F2 is referred to as a folding line direction. As shown in FIG. 3A, a tape member 21 is provided at an end of the wrapping material 20 on the front side of the napkin 1 in the unfolded state. At the time of opening, the wearer first grasps the tape member 21 and pulls the tape member 21 to deploy the packaging material 20.

  As shown in FIGS. 1 and 2, the package 50 in the “deployed state” refers to a state in which the package 50 in the packaged state is opened and all the folded parts are unfolded. As shown in FIGS. 3A and 3B, the package 50 in the “packaged state” folds a predetermined portion of the package 50 in the unfolded state, specifically, folds a pair of wing portions inward in the width direction. A state in which the skin side sheet is folded inside at the first fold line F1 and the second fold line F2, and the package material 20 is sealed by welding an end 20e in the fold line direction. The package 50 has two fold lines, a first fold line F1 and a second fold line F2, and the first fold line to be developed to change from the packaged state to the expanded state is the first fold line F1. The last folding line to be developed to change from the packaged state to the developed state is the second folding line F2.

<< Basic configuration of sanitary napkin 1 >>
FIG. 4 is a plan view of the sanitary napkin 1 viewed from the skin side. FIG. 5 is a plan view of the napkin 1 viewed from the non-skin side. FIG. 6 is a schematic cross-sectional view of the napkin 1 as viewed from an arrow AA in FIG. FIG. 7 is a diagram illustrating an application region of the cooling sensation material.

  The napkin 1 has a longitudinal direction, a width direction, and a thickness direction orthogonal to each other. In the longitudinal direction of the napkin 1, the side that contacts the lower abdomen of the user is referred to as “front side”, and the side that contacts the buttocks of the user is referred to as “rear side”. Further, in the thickness direction of the napkin 1, the side in contact with the user's skin is called "skin side", and the opposite side is called "non-skin side". The longitudinal direction of the napkin 1 is also the longitudinal direction of the deployed state 50. The line XX in the figure is the center line in the width direction.

  The napkin 1 has a pair of wing portions 1W extending from the central portion in the longitudinal direction to both outer sides in the width direction. Hereinafter, in the longitudinal direction of the napkin 1, a portion provided with the wing portion 1W is referred to as a central portion 1B, a portion in front of the central portion 1B is referred to as a front side portion 1A, and a portion behind the central portion 1B is referred to as a rear side portion 1C.

  In the center of the napkin 1 in the width direction, a skin side sheet 2, an intermediate sheet 3, an absorber 10, a non-skin side sheet 4, and a side sheet 6 are provided. The skin side sheet 2, the intermediate sheet 3, the absorber 10, and the non-skin side sheet 4 are laminated in order from the skin side in the thickness direction, and the side sheet 6 is an end in the width direction of the skin side surface of the skin side sheet 2. It is arrange | positioned over the width direction edge part of the non-skin side surface of the absorber 10 from a part. The skin-side sheet 2, the intermediate sheet 3, the absorber 10, the non-skin-side sheet 4, and the side sheet 6 are respectively fixed by using an adhesive such as a hot melt adhesive. The adhesive is applied in an arbitrary application pattern over the skin side and the non-skin side of each member, and can be selected from application patterns such as an Ω pattern, a spiral pattern, and a stripe pattern. In FIG. 6 and the like, the adhesive is omitted for convenience.

  The skin-side sheet 2 and the intermediate sheet 3 are liquid-permeable sheet members, and examples thereof include an air-through nonwoven fabric. The skin side sheet 2 is a white sheet member, and the intermediate sheet 3 is a pale green sheet member. Each of the wing sheet 5 and the side sheet 6 is a hydrophobic sheet member, and examples thereof include an air-through nonwoven fabric and a spunbonded nonwoven fabric. The non-skin side sheet 4 is a liquid-impermeable sheet member, and examples thereof include a polyethylene (PE) resin film. The non-skin side sheet 4 has a plane size larger than the absorber 10 and covers the entire plane of the absorber 10. Each of the wing sheet 5, the side sheet 6, and the non-skin side sheet 4 is a white sheet member.

  The wing portion 1W is formed by a side sheet 6 and a non-skin side sheet 4 extending outward from both sides in the width direction of the skin side sheet 2 and the like. Note that the napkin 1 may be in a form that does not have the wing portion 1W.

  The absorber 10 is a member that absorbs excrement and holds it inside. The absorber 10 has an absorbent core (not shown) and a cover sheet (not shown) covering the absorbent core. The absorbent core is formed by adding a highly absorbent polymer (so-called SAP) which is a liquid absorbent granular material to a pulp fiber or a cellulosic absorbent fiber which is a liquid absorbent fiber, and molded into a predetermined shape. It is. The cover sheet is a liquid-permeable sheet, and may be a tissue or the like.

  In the napkin 1, a green sheet member was used for the intermediate sheet 3, but a colored sheet member was used for any of the skin side sheet 2, the intermediate sheet 3, the wing sheet 5, the side sheet 6, and the non-skin side sheet 4. It is preferable to use At this time, by using a sheet of a cold color such as blue, light blue, or green, it is easy to give a cool impression to the wearer.

  As shown in FIG. 4, when viewed from the side of the skin, it can be seen that the napkin 1 has a snow display S 1, a snow display S 2 representing a snow crystal, and a plurality of linear pressing portions E. Each of the snow display S1 and the snow display S2 is a figure representing a snow crystal, and is a recall display for reminding that the napkin 1 includes a cool sensation material. Generally, since there is a notion that snow is cold, the wearer can easily recognize that the napkin 1 has a cool sensation material by visually recognizing the display of the snow crystal.

  The plurality of linear squeezed portions E are shaped so as to surround a region where the vaginal opening of the wearer is supposed to come into contact in the wearing state, and are provided in a shape that follows the shape of the absorber 10. The linear pressing portion E is a pressing portion formed by pressing the skin side sheet 2, the intermediate sheet 3, and the absorber 10 from the thickness direction into a desired shape. Due to the squeezing, the fiber density of the skin-side sheet 2, the fiber density of the intermediate sheet 3, and the fiber density of the absorbent core 10 are higher than those of the unpressed portion. The provision of the linear pressing portion E suppresses the excrement from spreading outside a predetermined range, and reduces the possibility that the excrement leaks from the napkin 1.

  The non-skin side surface of the napkin 1 (that is, the non-skin side surface of the non-skin side sheet 4) is provided with a central adhesive portion 8 to which an adhesive is applied. As shown in FIG. 5, the central adhesive portion 8 has a plurality of rectangular central adhesive portions 8 having long sides in the longitudinal direction arranged at intervals in the width direction. The number and arrangement are not limited to this. When the napkin 1 is used, the central adhesive portion 8 is attached to the skin side of clothing such as underwear, so that the napkin 1 is fixed to the underwear or the like.

  Similarly, a wing adhesive portion 9 is provided on the non-skin side surface (the non-skin side surface of the non-skin side sheet 4) in the thickness direction of each wing portion 1W. As shown in FIG. 5, the wing adhesive section 9 has a plurality of rectangular wing adhesive sections 9 having long sides in the longitudinal direction arranged at intervals in the width direction. The number and arrangement are not limited to this. When the napkin 1 is used, the wing portion 1W is bent to the non-skin side, and the wing adhesive portion 9 is attached to the non-skin side surface such as underwear. Thereby, the wing portion 1W is fixed to the underwear or the like.

  The napkin 1 preferably includes a volatile material such as a cool sensation material, a warm sensation material, or a fragrance. The napkin 1 is provided between the skin-side sheet 2 and the intermediate sheet 3 with a cooling sensation material containing a compound that gives the wearer a cool or cool feeling. The cooling sensation material is a volatile substance, and examples thereof include a liquid containing menthol and menthyl lactate. The cooling sensation material is applied to a desired place according to the effect of the cooling sensation material in a predetermined application pattern on the front or back surface of the skin-side sheet 2, the front or back surface of the intermediate sheet 3, the absorber 10, and the like. Can be. For example, a liquid cooling material is applied to the napkin 1 on the non-skin side surface of the skin side sheet 2 at the time of manufacture. FIG. 7 shows an application area Q of the cooling sensation material. As shown in FIG. 7, the cooling sensation material of the napkin 1 is continuously applied to the central region in the width direction from the front end to the rear end in the longitudinal direction.

  Further, an oil film layer R is provided on the skin side surface of the skin side sheet 2 in a region that is considered to be in contact with the wearer's vaginal opening when worn. As the oil film layer R, an oil film such as triacylglycerol is used, which suppresses the cooling sensation material from directly contacting the genital area of the wearer, thereby facilitating giving the wearer an appropriate cooling sensation effect.

<< About packaging material 20 >>
The wrapping material 20 is a sheet-like wrapping member that individually wraps the napkin 1, and is a member that is removed when the napkin 1 is used. In the unfolded state, a surface in contact with the napkin 1 is called an inner surface, and a surface opposite to the inner surface is called an outer surface. The packaging material 20 has a design based on green, and as shown in FIGS. 1 and 2, the packaging material 20 is provided with a recall display M1, a recall display M2, a recall display M3, and the like. I have. The recall display M1, the recall display M2, and the recall display M3 are recall displays for reminding that the napkin 1 includes the cooling sensation material. Generally, the sea and ice cream have a conceptually cool impression, and the word “cool” expresses “cool” by characters. Even before using the napkin 1, the wearer easily recognizes that the napkin 1 has a cooling sensation material by visually recognizing the recall indications M1, M2, and M3 of the packaging material 20. .

  As a material of the packaging material 20, for example, various films such as a plastic film and a nylon film, a nonwoven fabric, a film obtained by laminating a nonwoven fabric, and the like can be used. Specifically, as shown in FIG. 8, the packaging material 20 includes a first layer 20a located on the inner surface of the packaging material 20, a second layer 20b located on the outer surface, and a first layer 20b located between the first layer and the second layer. Has an intermediate layer. FIG. 8 is a diagram illustrating a cross section of the packaging material 20 in FIG.

  The first layer 20a and the second layer 20b are modified polyethylene sheets (modified PE) containing 10% or more of maleic acid as an adhesive resin (adhesive substance), and the intermediate layer 20c is composed of an ethylene-vinyl alcohol copolymer. It is a sheet (EVOH). It is preferable that the first layer 20a and the second layer 20b contain an adhesive resin at least on the surface in contact with the intermediate layer 20c. For the first layer 20a and the second layer 20b, a welding substance that enables welding of the packaging materials 20 to be in a packaging state is used. For example, for the first layer 20a and the second layer 20b, a weldable resin such as polypropylene (PP) may be used instead of polyethylene (PE). For the intermediate layer 20c, it is preferable to use a material that can prevent volatilization of volatile substances. Since the napkin 1 includes a cooling sensation material, it is preferable to use a material that can prevent volatilization of the cooling sensation material.

  The junction between the first layer 20a and the intermediate layer 20c and the junction between the intermediate layer 20c and the second layer 20b are performed by heating the intermediate layer 20c to about 76 degrees with the intermediate layer 20c sandwiched between the first layer 20a and the second layer 20b. By applying pressure, the adhesive resin is melted and adhered. In other words, by using the modified PE for the first layer 20a and the second layer 20b, each layer can be bonded without applying an adhesive or the like. Therefore, the thickness of the packaging material 20 is thinner than the case where the adhesive is used. can do.

  Specifically, the first layer 20a is 6 μm, the intermediate layer 20c is 4 μm, the second layer 20b is 6 μm, and the thickness of the packaging material 20 is 16 μm. The thickness of the packaging material 20 is 4 μm or more and less than 20 μm. The first layer 20a or the second layer 20b is preferably thicker than the intermediate layer 20c. Since the first layer 20a and the second layer 20b include a welding substance such as PE, the welding of the packaging material can be made stronger than when the thickness of the intermediate layer 20c is thinner. When the napkin 1 has a volatile substance, the intermediate layer 20c preferably has a thickness of at least 2 μm.

  Further, it is preferable that an adhesive resin is provided in a portion corresponding to the end 20e of the first layer 20a or the second layer 20b. In the welding step, by applying heat and pressure, the adhesiveness of the adhesive resin is easily exerted, and the end portion 20e is not only welded by a welding material such as PE, but also bonded by the adhesive material. Stronger bonding can be achieved.

  3A and 3B, the number of the partially overlapped packaging materials 20 may be different depending on the method of folding the packaging body 50 for joining the ends 20e of the packaging material 20 to obtain the packaging state. FIG. 9 is a view for explaining welding when a conventional packaging material 200 is used. FIG. 10 is a diagram illustrating welding when the packaging material 20 is used. FIGS. 9 and 10 show a package 500 and a package 50 each having two fold lines. For convenience, the thickness is larger than the actual one and is schematically shown, and the napkin and the tape member are omitted. . The left and right in FIGS. 9 and 10 are the fold line orthogonal directions orthogonal to the fold line direction, and in FIGS. 9 and 10, the side where the part to be firstly deployed at the time of use is located on the upper side.

  The packaging material 200 shown in FIG. 9 has a thickness t of about 32 μm. The packaging body 500 has, in the thickness direction, double parts x, x in each of which two sheets of the packaging material 200 are stacked on one side and the other side in the direction perpendicular to the folding line, and the double part x and the double part x In between, there is a triple part y in which three packaging materials 200 are stacked. The portions where the packaging materials 200 at the ends in the folding line direction of the double portions x and x are welded to each other are first welded portions Wx and Wx, respectively, and the packaging materials 200 at the ends of the triple portion y are welded together. The portions thus formed are the second welded portion Wy2 and the third welded portion Wy3 in order from the upper side. Since the thickness of the double part x is about 2 t and the thickness of the triple part y is about 3 t at the end of the package 500 in the folding line direction, the difference in thickness between the double part x and the triple part y is obtained. Is t, which is the thickness of the packaging material 200. At this time, generally, in a welding process, since heat and pressure are uniformly applied to a welding position using a roller or the like, when a packaging material having a thickness t of 20 μm or more is used, the number of packaging materials 200 to be stacked is There is a possibility that a stronger pressure is applied to the third welded portion Wy3 located below the triple portion y at the time of welding to break the packaging material 200. On the other hand, if the heat and pressure are reduced in the welding step in order to prevent the packaging material 200 from being damaged at the third welded portion Wy3, the pressure for welding is applied to the double portion x where the number of stacked packaging materials 200 is small. It has become insufficient, and there has been a fear that bonding by welding will not be performed sufficiently.

  In this regard, since the thickness T of the packaging material 20 is 4 μm or more and less than 20 μm (4 μm ≦ T <20 μm), it is possible to more reliably perform welding by welding while reducing damage to the packaging material 20 due to welding. it can. In order to reduce the possibility that the packaging material 20 itself may be damaged during transportation or the like, the thickness T of the packaging material 20 is set to 4 μm or more, and in order to make the difference in welding between the double portion X and the triple portion T more uniform. The thickness T of the packaging material is less than 20 μm. For example, when the thickness T of the packaging material is 16 μm and 100 end portions 20e of the package 50 are welded, 75 packages 50 without breakage and without insufficient welding can be manufactured.

  The packaging material 20 shown in FIG. 10 has a thickness T of about 16 μm. The packaging body 50 has, in the thickness direction, double portions X and X in each of which two pieces of the packaging material 20 are stacked on one side and the other side in the direction perpendicular to the folding line, and the double portion X and the double portion X In between, there is a triple portion Y in which three packaging materials 20 are stacked. Further, the portions where the packaging materials 20 of the end portions 20e in the double portions X and X are welded are the first welded portions WX and WX, respectively, and the packaging materials 200 of the end portions 20e in the triple portion Y are welded. The portions are a second welded portion WY2 and a third welded portion WY3 in order from the top. At the end 20e of the package 50, the thickness of the double part X is about 2T and the thickness of the triple part Y is about 3T. This is T, which is the thickness of the material 20. That is, since the thickness T of the packaging material 20 is smaller than the thickness t of the conventional packaging material 200 (t> T), as shown in FIG. The difference in thickness can be made smaller than the difference in thickness between the double part x and the triple part y of the conventional package 500. This makes it easier to apply heat and pressure to the package 50 more uniformly than when a package having a thickness of 20 μm or more is used. It is possible to reduce the possibility that welding or partial welding may be insufficient.

  Further, by forming the packaging material 20 into a more uniform welded joint, even when the napkin 1 is provided with a volatile substance such as a cooling sensation material as in the packaging body 50, the volatile substance is removed from the packaging body 50. Can be reduced, and the wearer can easily feel the effect of the volatile substance when worn.

  Further, the difference in the force (hereinafter, also referred to as “separation force”) between the first welding portion Wx, the second welding portion Wy2, and the third welding portion Wy3 in the welding of the packaging materials 20 at the first welding portion Wx, the second welding portion Wy3, and the third welding portion Wy3 is smaller. can do. FIG. 11 is a diagram illustrating the separation force at the first welded portion Wx, the second welded portion Wy2, and the third welded portion Wy3 of the package 50. FIG. 11 shows a state in which the welds of the welds Wx, Wy2, and Wy3 are separated for convenience. The separation force of the package 50 is larger in the order of the first welded portion Wx, the second welded portion Wy2, and the third welded portion Wy3, and the thickness T of the packaging material 20 is 4 μm or more and less than 20 μm. The difference between the first welded portion Wx having a small separating force and the third welded portion Wy3 having the largest separating force can be made smaller than 0.1N.

  FIG. 12 is a diagram illustrating the separation force at the first welded portion Wx and the third welded portion Wy3 of the package 500. In FIG. 12, the bar graph shows the magnitude of the separating force at the first welded portion Wx and the third welded portion Wy3, and the line graph shows the difference in the separating force between the first welded portion Wx and the third welded portion Wy3 ( The third welded portion Wy3-first welded portion Wx) is shown. The package 500 is welded at a welding temperature of 120 degrees, and the results at 108 degrees, 112 degrees, and 114 degrees are shown for reference. Hereinafter, a description will be given using the result of welding at 120 degrees.

  As shown in FIG. 12, the difference in the separation force between the first welded portion Wx and the third welded portion Wy3 in the package 500 is 0.99N. This difference in separation force is caused by a difference in heat and pressure applied due to a difference in thickness of the packaging material 200 in the welding step. In opening the package 500, generally, first, the second welded portion Wy2 is separated, then, the first welded portion Wx on one side, and the third welded portion Wy3 are separated, and finally, the other side. Is separated from the first welded portion Wx. At this time, if the difference between the separation forces of the welded portions Wx, Wy2, and Wy3 is large, the wearer may need to change the force applied when opening each part, which may make it difficult for the wearer to open.

  In this regard, in the packaging body 50, by making the difference between the first welded portion Wx and the third welded portion Wy3 smaller than 0.1 N, the wearer can easily open with a certain force at the time of unsealing, so that the unsealing operation is performed. Becomes easier.

  The magnitude of the separation force of each of the welded portions Wx, Wy2, Wy3 is measured by the following method. The welded portion Wx will be described. First, in the area of the first welded portion Wx, 40 mm inward from the end along the fold line direction of the package 50 and 18 mm in a direction orthogonal to the fold line direction are cut out, and the first welded portion Wx of the end portion 20e is cut. Form a sample strip containing Subsequently, the upper sheet (packaging material 20) of the sample piece is fixed to one chuck, and the lower sheet (packaging material 20) is fixed to one chuck. Then, using a universal material testing machine (Instron), the chuck interval is set to 10 mm, and in the peeling mode of the universal material testing machine, the distance between the two chucks is set to the upper sheet at a peeling angle of 180 degrees and a peeling speed of 100 mm / min. Spread out until the lower sheet separates, and measure the force to separate the lower sheet from the upper sheet. The same applies to the second welded portion Wy2, the third welded portion Wy3, and the first welded portion WX, the second welded portion WY2, and the third welded portion WY3.

  Further, the force for separating the first welded portion Wx, the second welded portion Wy2, and the third welded portion Wy3 is more preferably less than 1.2N. When the separation force is greater than 1.2 N, the wearer tends to apply force to separate the first welded portion Wx, the second welded portion Wy2, and the third welded portion Wy3, and open the package 50. However, if the separating force is smaller than 1.2 N, the wearer can open the package 50 with a light force.

  The difference between the separation force of the first welded portion Wx and the separation force of the third welded portion Wy3 is preferably smaller than よ り 小 さ い of the separation force of the first welded portion Wx ((third welded portion Wy3−first welded portion). Wx)> 1/2). More preferably, the difference between the separation force of the first welded portion Wx and the separation force of the third welded portion Wy3 is preferably smaller than 1/3 of the separation force of the first welded portion Wx ((third welded portion Wy3- 1 welded portion Wx)> １ ／), and the difference between the separation force of the first welded portion Wx and the third welded portion Wy3 is preferably smaller than 1/10 of the separation force of the first welded portion Wx. ((Third welded portion Wy3-first welded portion Wx)> 1/10). By doing so, the force applied by the wearer at the time of opening can be easily made constant, and the opening operation of the wearer can be made easier.

  As shown in FIG. 3A and the like, the tape member 21 includes a peeling portion 21r that can be peeled at the time of opening, and a fixing portion 21s fixed to the packaging material 20. It is more preferable that the separating force of the first welded portion Wx, the separating force of the second welded portion Wy2, and the separating force of the third welded portion Wy3 are each smaller than the force for separating the peeling portion 21r from the packaging material 20. By doing so, when the separating force of the first welded portion Wx, the separating force of the second welded portion Wy2, and the separating force of the third welded portion Wy3 are each greater than the force for separating the tape member 21r from the packaging material 20. Thus, the package 50 can be opened with a small force.

  Further, the package 50 includes a protective sheet (not shown) for protecting the central adhesive portion 8 on the non-skin side surface of the napkin 1, and the protective sheet is attached to the central adhesive portion 8 in a packaged state and a deployed state. At this time, it is more preferable that the separating force of the first welded portion Wx, the separating force of the second welded portion Wy2, and the separating force of the third welded portion Wy3 are larger than the force for separating the protective sheet from the napkin 1. By doing so, the protection sheet is stuck to the central adhesive portion 8 in the state and the deployed state. At this time, a state in which the separation force of the first welded portion Wx, the separation force of the second welded portion Wy2, and the separation force of the third welded portion Wy3 are more strongly welded than when the protection sheet is separated from the napkin 1 is smaller than the force. Since the package 50 can be used, the risk of the package 50 being opened carelessly can be reduced.

  FIG. 13 is an enlarged view of a portion Z in FIG. 3A. In FIG. 13, the right side in the folding line direction is the outside, and the left side is the inside. The end portion 20e has a plurality of welding portions g having a rectangular shape, and a set of the plurality of welding portions g is referred to as a welding region G. The force for separating the welding between the packaging materials 20 at the outer end portion Ge in the folding line direction of the welding region G causes the welding between the packaging materials 20 at the inner end Gi in the folding line direction of the welding region G to be separated. Preferably, it is greater than the force. By doing so, the inner end portion Gi can be opened with a weaker force, and thus can be opened with a smaller force when starting to open from the packaged state to the deployed state. On the other hand, since the outer portion Ge is more strongly welded, when a volatile substance such as a cooling sensation material is provided like the napkin 1, it is possible to reduce the risk that the volatile substance is volatilized from the package 50. it can. The outer end portion Ge and the inner end portion Gi having different forces for separating the welding between the packaging materials 20 can be formed by performing welding using a roller having convex portions having different heights in the welding process.

=== Other Embodiments ===
As described above, the embodiments of the present invention have been described. However, the above embodiments are for the purpose of facilitating the understanding of the present invention, and are not intended to limit and interpret the present invention. Further, the present invention can be changed or improved without departing from the gist thereof, and it goes without saying that the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, the first layer 20a and the second layer 20b each contain an adhesive resin capable of adhering to the intermediate layer 20c. However, the present invention is not necessarily limited to this. Either the first layer 20a or the second layer 20b may have an adhesive resin, or both the first layer 20a and the second layer 20b may not have the adhesive resin. Is also good. For example, the packaging material 20 may be a packaging material having another layer in addition to the first layer 20a, the second layer 20b, and the intermediate layer 20c. For example, FIG. 14 is a diagram illustrating a cross section of a packaging material 20 according to another embodiment. The packaging material 20 shown in FIG. 14 has the first layer 20a, the adhesive layer H, the intermediate layer 20b, the adhesive layer H, and the second layer 20c superimposed in order from the inner surface in the state of the packaging material 20 in the unfolded state. Have been. The first layer 20a and the intermediate layer 20c are bonded by an adhesive layer H, and the intermediate layer 20c and the second layer 20b are bonded by the adhesive layer H. Even with the packaging material 20 having such a configuration, by setting the thickness T of the packaging material 20 to 4 μm or more and less than 20 μm (4 μm ≦ T <20 μm), it is possible to reduce breakage of the packaging material 20 due to welding, Bonding by welding can be performed reliably.

  In the above-described embodiment, the packaging material 20 including the first layer 20a, the second layer 20b, and the intermediate layer 20c is used. However, the present invention is not limited to this. For example, a third layer (not shown) made of another sheet material may be provided between the first layer 20a and the intermediate layer 20c. Each layer 20a, 20b, 20c, etc. of the packaging material 20 can be appropriately changed depending on the shape of the napkin 1, the volatile substance included in the napkin 1, and the like.

  Further, with respect to the first layer 20a or the second layer 20b, the surface on the side opposite to the intermediate layer 20c has less adhesive resin than the surface on the side of the intermediate layer 20c, and the amount of the welding substance such as PE is increased. Is also good. The surface on the side opposite to the intermediate layer 20c is a surface on which the packaging material 20 is more welded, and is a region that requires welding with a welding substance rather than the adhesive effect of the adhesive resin. Therefore, it is easy to make the welding stronger by increasing the amount of the welding substance.

  In the above embodiment, the wrapping material 20 is provided with the reminder signs M1, M2, M3, and the like. However, these patterns and the coloring of the wrapping material 20 may be printed using an ink such as an acrylic pigment. . The ink can reduce the separation force due to welding between the packaging materials 20. Therefore, by adjusting the printing position and the like and the amount of ink in the packaging material 20, the strength of welding between the packaging materials 20 can be adjusted.

1 napkin (absorbent article),
1A front part, 1B center part, 1C rear part, 1W wing part,
2 skin side sheet, 3 intermediate sheets,
4 non-skin side sheets, 6 side sheets,
8 center adhesive, 9 wing adhesive,
10 absorber,
20 packaging materials,
20a first layer, 20b second layer, 20c intermediate layer,
20e end,
50 packages (absorbent article packages),
E linear pressing part,
F1 first fold line, F2 second fold line,
G Product name display,
M1 recall display, M2 recall display, M3 recall display,
R oil film layer,
S1 snow display (recall display), S2 snow display (recall display),
X double part, Y triple part,
WX first welded part, WY2 second welded part, WY3 third welded part

Claims (15)

An absorbent article, comprising a packaging material for packaging the absorbent article,
The packaging material has at least a first layer, a second layer, and an intermediate layer located between the first layer and the second layer.
The packaging material is folded along the folding line direction of the packaging material, and the absorbent article is packaged,
An end of the packaging material in the folding line direction is an absorbent article package welded,
The package for an absorbent article, wherein the thickness of the packaging material is 4 μm or more and less than 20 μm. It is an absorbent article package according to claim 1,
The said absorbent article has a volatile substance, The absorbent article package characterized by the above-mentioned. It is an absorbent article package according to claim 2,
The intermediate layer is a protective layer for preventing the volatile substance from volatilizing,
An absorbent article package, wherein at least one of the first layer and the second layer has an adhesive substance capable of bonding to the intermediate layer. An absorbent article package according to claim 3,
The surface of the one layer opposite to the intermediate layer has a smaller amount of the adhesive substance than the surface of the intermediate layer, the absorbent article package. The absorbent article package according to claim 3 or 4,
A portion of the one layer corresponding to the end portion is provided with the adhesive substance, and the absorbent article package. It is an absorbent article package according to claim 2,
The intermediate layer is a protective layer for preventing the volatile substance from volatilizing,
An absorbent article package, wherein at least one of the first layer and the second layer and the intermediate layer are adhered by an adhesive. An absorbent article package according to any one of claims 2 to 6,
The intermediate layer is a protective layer for preventing the volatile substance from volatilizing,
The package for absorbent articles, wherein the thickness of the one layer is larger than the thickness of the intermediate layer. An absorbent article package according to any one of claims 1 to 7,
In the packaged state, having a thickness direction,
The packaging material is folded plural times,
In the thickness direction, a double portion in which two pieces of the packaging material are stacked, and a triple portion in which three pieces are stacked, are provided,
At the time of use, the side where the part to be deployed first is located is the upper side,
A portion where the packaging materials of the end portions of the double portion are welded to each other is a first welded portion,
When a portion of the triple portion where the packaging materials of the end portions are welded to each other is referred to as a second welded portion and a third welded portion in order from the upper side,
The force for separating the welding between the packaging materials in the third welding portion is stronger than the force for separating the welding between the packaging materials in the second welding portion,
The difference between the force for separating the welding between the packaging materials in the third welding portion and the force for separating the welding between the packaging materials in the first welding portion is smaller than 0.1 N. Goods packaging. An absorbent article package according to any one of claims 1 to 8,
In the packaged state, having a thickness direction,
The packaging material is folded plural times,
In the thickness direction, a double portion in which two pieces of the packaging material are stacked, and a triple portion in which three pieces are stacked, are provided,
At the time of use, the side where the part to be deployed first is located is the upper side,
A portion where the packaging materials of the end portions of the double portion are welded to each other is a first welded portion,
When a portion of the triple portion where the packaging materials of the end portions are welded to each other is referred to as a second welded portion and a third welded portion in order from the upper side,
An absorbent article package, wherein a force for separating welding of the packaging materials in the first welded portion, the second welded portion, and the third welded portion is less than 1.2 N, respectively. An absorbent article package according to any one of claims 1 to 9,
In the packaged state, having a thickness direction,
The packaging material is folded plural times,
In the thickness direction, a double portion in which two pieces of the packaging material are stacked, and a triple portion in which three pieces are stacked, are provided,
At the time of use, the side where the part to be deployed first is located is the upper side,
A portion where the packaging materials of the end portions of the double portion are welded to each other is a first welded portion,
When a portion of the triple portion where the packaging materials of the end portions are welded to each other is referred to as a second welded portion and a third welded portion in order from the upper side,
The difference between the force for separating the welding of the packaging materials in the third welding portion and the force for separating the welding of the packaging materials in the first welding portion is the welding of the packaging materials in the first welding portion. Characterized in that it is smaller than one half of the force for separating the absorbent article. The absorbent article package according to claim 10,
The difference between the force for separating the welding of the packaging materials in the third welding portion and the force for separating the welding of the packaging materials in the first welding portion is the welding of the packaging materials in the first welding portion. Characterized in that it is smaller than one-third of a force for separating the absorbent article. It is an absorbent article package according to claim 11,
The difference between the force for separating the welding of the packaging materials in the third welding portion and the force for separating the welding of the packaging materials in the first welding portion is the welding of the packaging materials in the first welding portion. Characterized in that it is smaller than 1/10 of the force that separates the absorbent article. It is an absorbent article package according to any one of claims 1 to 12,
In the packaged state, having a thickness direction,
The packaging material has a tape member,
The tape member includes a peeling portion that can be peeled at the time of opening, and a fixing portion fixed to the packaging material.
The packaging material is folded plural times,
In the thickness direction, a double portion in which two pieces of the packaging material are stacked, and a triple portion in which three pieces are stacked, are provided,
At the time of use, the side where the part to be deployed first is located is the upper side,
A portion where the packaging materials of the end portions of the double portion are welded to each other is a first welded portion,
When a portion of the triple portion where the packaging materials of the end portions are welded to each other is referred to as a second welded portion and a third welded portion in order from the upper side,
A force for separating the welding between the packaging materials in the first welding portion, a force for separating the welding between the packaging materials in the second welding portion, and the welding between the packaging materials in the third welding portion. The package for absorbent articles, wherein the force is smaller than the force for separating the peeling portion from the packaging material. It is an absorbent article package according to any one of claims 1 to 13,
In the packaged state, having a thickness direction,
The absorbent article includes an adhesive area on the non-skin side,
The packaging material includes a protective sheet for protecting the adhesive area,
The packaging material is folded plural times,
In the thickness direction, a double portion in which two pieces of the packaging material are stacked, and a triple portion in which three pieces are stacked, are provided,
At the time of use, the side where the part to be deployed first is located is the upper side,
A portion where the packaging materials of the end portions of the double portion are welded to each other is a first welded portion,
When a portion of the triple portion where the packaging materials of the end portions are welded to each other is referred to as a second welded portion and a third welded portion in order from the upper side,
A force for separating the welding between the packaging materials in the first welding portion, a force for separating the welding between the packaging materials in the second welding portion, and the welding between the packaging materials in the third welding portion. The absorbent article package, wherein the force is greater than the force for separating the absorbent article from the protective sheet. It is an absorbent article package according to any one of claims 1 to 14,
The absorbent article has a volatile substance,
The end portion has a welding area where the packaging materials are welded to each other,
The force for separating the welding between the packaging materials at the outer end in the fold line direction of the welding region separates the welding between the packaging materials at the inner end in the fold line direction of the weld region. An absorbent article package characterized by having a force greater than the force to be applied.

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