CN213489861U - Functional article - Google Patents

Abstract

In a functional article including a functional layer and an adhesive layer, the effect of the functional layer is maintained and the adhesive layer is suppressed from remaining on the skin surface of a wearer or underwear when the functional article is detached. The functional article (1) comprises base materials (7, 9) and an adhesive layer (21) formed on the skin contact surface or the non-skin contact surface of the base materials. The functional article is provided with a functional layer (13) having a predetermined function along the skin contact surface at a position on the side of the base material closer to the skin contact surface than the non-skin contact surface. The functional layer has a functional agent containing a lipophilic component. The functional layer and the adhesive layer are formed at positions where at least part of the functional layer and the adhesive layer do not overlap in the thickness direction of the functional article and where at least part of the adhesive layer and the functional layer do not overlap in the thickness direction of the functional article.

Description

Functional article

Technical Field

The utility model relates to a functional article containing a functional agent.

Background

Functional articles containing a functional agent having a predetermined function are known to give a feeling of warmth, coolness, or the like to the wearer of the article through the skin. For example, patent document 1 discloses an absorbent article containing a drug (functional agent) capable of transmitting a sensation to a wearer without creating an external condition felt by the wearer. According to patent document 1, examples of the medicine include a heating agent (temperature sensing agent) or a cooling agent (cold sensing agent) that stimulates a temperature receptor (a warm or cold sensing receptor) of the skin without creating a temperature change on the body surface of the wearer.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication Hei-2004-528090

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

The functional agent contains a solvent component and functional components such as a temperature-sensitive component and a cold-sensitive component. The functional component and the solvent component may contain lipophilic components and hydrophilic components. However, the lipophilic component is preferably used because it is less volatile than the hydrophilic component and can simplify packaging of the functional article.

Therefore, a case is considered in which a functional layer having a functional agent containing a lipophilic component is provided on an article to form a functional article. In this case, in order to facilitate the function of the functional agent to act on the body of the wearer, a functional layer is formed in the functional article at a position close to the skin. On the other hand, the functional article includes an adhesive layer for attachment to the skin surface of the wearer or underwear. Here, if the functional layer and the adhesive layer are close to each other in the functional article, a part of the lipophilic component of the functional layer may diffuse into the adhesive layer and come into contact with the adhesive layer. In this case, the adhesive layer is locally dissolved in the lipophilic component, and strongly bonds to the skin surface or underwear of the wearer, and the adhesive layer may remain on the skin surface or underwear of the wearer even after the functional article is removed. In this case, if the amount of the lipophilic component is reduced or the functional layer area is narrowed, the effect of the functional component may be reduced.

Therefore, an object of the present invention is to provide a functional article including a functional layer and an adhesive layer, which can prevent the adhesive layer from remaining on the skin surface of a wearer or underwear when the functional article is detached after use while maintaining the effect of the functional component of the functional layer.

Means for solving the problems

The utility model discloses a functional article includes: a base material having a skin contact surface and a non-skin contact surface on the side opposite to the skin contact surface; and an adhesive layer formed on the skin contact surface or the non-skin contact surface of the base material, wherein the functional article includes a functional layer having a predetermined function along the skin contact surface at a position on the side of the base material closer to the skin contact surface than the non-skin contact surface, the functional layer includes a functional agent containing a lipophilic component, and the functional layer and the adhesive layer are formed at positions where at least a part of the functional layer and the adhesive layer do not overlap in a thickness direction of the functional article and where at least a part of the adhesive layer and the functional layer do not overlap in the thickness direction of the functional article.

Effect of the utility model

According to the present invention, in the functional article including the functional layer and the adhesive layer, it is possible to suppress the adhesive layer from remaining on the skin surface or underwear of the wearer when the functional article is detached after use while maintaining the effect of the functional component of the functional layer.

Drawings

Fig. 1 is a plan view of a configuration example of a functional article according to embodiment 1.

Fig. 2 is an exploded perspective view of a structural example of the functional article according to embodiment 1.

Fig. 3 is a schematic view showing a wearing state of the functional article according to embodiment 1.

Fig. 4 is a perspective view of a structural example of the functional article according to embodiment 2.

Fig. 5 is an exploded perspective view of a configuration example of the functional article according to embodiment 2.

Fig. 6 is a schematic view showing a wearing state of the functional article according to embodiment 2.

Detailed Description

Specifically, the present disclosure relates to the following aspects.

[ means 1]

A functional article, comprising: a base material having a skin contact surface and a non-skin contact surface on the side opposite to the skin contact surface; and an adhesive layer formed on the skin contact surface or the non-skin contact surface of the base material, wherein the functional article includes a functional layer having a predetermined function along the skin contact surface at a position on the side of the base material closer to the skin contact surface than the non-skin contact surface, the functional layer includes a functional agent containing a lipophilic component, and the functional layer and the adhesive layer are formed at positions where at least a part of the functional layer and the adhesive layer do not overlap in a thickness direction of the functional article and where at least a part of the adhesive layer and the functional layer do not overlap in the thickness direction of the functional article.

In the above-described functional article, the functional layer and the adhesive layer are formed at positions where at least part of the functional layer does not overlap with the adhesive layer in the thickness direction and where at least part of the adhesive layer does not overlap with the functional layer in the thickness direction. Therefore, even if the lipophilic component of the functional layer diffuses into the adhesive layer, the amount of the lipophilic component that reaches the adhesive layer can be suppressed, and therefore the amount of the adhesive layer that is locally dissolved in the lipophilic component can be suppressed. Further, since a part of the adhesive layer is located at a position which is not easily affected by the lipophilic component and strong bonding with the functional article can be maintained, when the functional article is detached, the part partially dissolved in the lipophilic component can be pulled by the bonding-maintained part of the adhesive layer and is easily peeled off together. Thus, it is possible to suppress the adhesive agent from being strongly bonded to the skin surface or underwear of the wearer and remaining on the skin surface or underwear of the wearer even after the functional article is detached, while maintaining the effect of the functional layer, without reducing the amount of the lipophilic component of the functional layer or reducing the area of the functional layer.

[ means 2]

The functional article according to aspect 1, wherein the functional article is an absorbent article, the base material includes a liquid-permeable sheet positioned on the skin contact surface side, a liquid-impermeable sheet positioned on the non-skin contact surface side, and an absorbent body positioned between the liquid-permeable sheet and the liquid-impermeable sheet, the adhesive layer is positioned on a surface of the liquid-impermeable sheet on the non-skin contact surface side, the functional layer is positioned on the skin contact surface side with respect to the liquid-impermeable sheet, and the functional layer is formed at a position not overlapping with the absorbent body in the thickness direction.

The functional article described above is an absorbent article in which the functional layer and the adhesive layer are formed at a position where at least part of the functional layer does not overlap with the adhesive layer in the thickness direction and at least part of the adhesive layer does not overlap with the functional layer in the thickness direction. Therefore, even if the lipophilic component of the functional layer diffuses toward the non-skin contact surface side, the amount of the lipophilic component that reaches the adhesive layer on the non-skin contact surface side of the liquid-impermeable sheet can be suppressed, and therefore the amount of the adhesive layer that is locally dissolved in the lipophilic component can be suppressed. Further, since a part of the adhesive layer is located at a position which is not easily affected by the lipophilic component and strong bonding with the functional article can be maintained, when the absorbent article is removed, the part partially dissolved in the lipophilic component can be pulled by the bonding-maintained part of the adhesive layer, and thus the parts can be easily peeled together. This makes it possible to prevent the adhesive agent from being strongly bonded to the undergarment and remaining in the undergarment even after the absorbent article is removed, while maintaining the effect of the functional layer, without reducing the amount of the lipophilic component in the functional layer or reducing the area of the functional layer.

[ means 3]

The functional article according to aspect 2, wherein the functional layer is formed on at least one of a front side and a rear side in a longitudinal direction of the absorbent article with respect to a region where the absorbent body is provided.

In the above-described functional article (absorbent article), since the functional layer is formed at the position on the front side and the rear side in the longitudinal direction of the absorbent body, that is, at the position on the abdomen and the back side, the deformation or the like caused by the movement of the wearer's body is smaller than that in the case of forming the functional layer at the position where the absorbent body is located. Therefore, strong adhesion is not required, and thus the size of the adhesive layer can be relatively reduced. Therefore, the functional layer and the adhesive layer can be easily arranged at positions that do not overlap each other in the thickness direction. This can further suppress the adhesive layer from remaining in the underwear while maintaining the effect of the functional layer.

[ means 4]

The functional article according to mode 3, wherein the adhesive layer is formed at a position that does not overlap with at least a central portion of the functional layer in the width direction of the absorbent article in the thickness direction of the absorbent article.

When the functional layer is formed at a position on the front side or the rear side in the longitudinal direction of the absorbent body, a predetermined function can be exerted more effectively on the abdomen and the back, but if the adhesive layer remains in the underwear, the stain of the adhesive layer becomes more conspicuous. Therefore, in the functional article (absorbent article) described above, the adhesive layer is formed at a position not overlapping with the central portion of the functional layer in the thickness direction. Therefore, even if the lipophilic component of the functional layer diffuses into the adhesive layer, the amount of the lipophilic component that reaches the adhesive layer can be suppressed, and therefore the amount of the adhesive layer that dissolves in the lipophilic component can be suppressed. The effect of the functional layer can be further improved, and the adhesive layer can be prevented from remaining in the underwear, and even if it remains, it can be made inconspicuous because it is not the central portion.

[ means 5]

The functional article according to mode 3, wherein the adhesive layer is not present at both ends of the functional layer in the width direction of the absorbent article and at positions outside of both ends in a plan view.

If the functional layer is formed on the front side or the rear side in the longitudinal direction of the absorbent body and the adhesive layer is present on both ends in the width direction or on the outer sides of both ends, the functional layer may be separated from the body of the wearer because wrinkles are generated in the undergarment and the functional layer follows the wrinkles of the undergarment and is also generated in the undergarment when the wearer closes the legs depending on the shape of the functional layer or the like. In the above-described functional article (absorbent article), the adhesive layer is not present at both ends in the width direction of the functional layer and at positions outside of both ends in a plan view. Therefore, the functional layer can be prevented from following the wrinkles of the undergarment, that is, from separating from the body of the wearer. This can further maintain the effect of the functional layer and prevent the adhesive layer from remaining in the undergarment.

[ means 6]

The functional article according to any one of aspects 2 to 5, wherein the functional layer is formed at a position that does not overlap with the adhesive layer in the thickness direction.

In the functional article (absorbent article) described above, the functional layer is formed entirely at a position not overlapping with the adhesive layer in the thickness direction. Therefore, even if the lipophilic component of the functional layer diffuses toward the non-skin contact surface side, the amount of the lipophilic component reaching the non-skin contact surface side of the liquid-impermeable sheet can be suppressed as much as possible, and therefore the amount of the adhesive layer dissolved in the lipophilic component can be greatly suppressed. This can significantly suppress the adhesive layer from remaining in the underwear while maintaining the effect of the functional layer.

[ means 7]

The functional article according to any one of aspects 2 to 6, wherein the functional layer is a liquid-retaining and liquid-permeable sheet member having a sheet shape, and the sheet member is positioned between the liquid-permeable sheet and the liquid-impermeable sheet.

In the above-described functional article (absorbent article), the functional layer has a sheet shape, that is, is formed separately from the liquid-permeable sheet and the liquid-impermeable sheet. Therefore, the amount of the lipophilic component, the region of the functional layer, and the position of the functional layer can be formed more accurately. This can more reliably suppress the adhesive layer from remaining in the undergarment while more reliably maintaining the effect of the functional layer.

[ means 8]

The functional article according to aspect 1, wherein the functional article is a functional sheet, the base material includes a liquid-retaining and liquid-permeable skin contact sheet and a liquid-impermeable non-skin contact sheet on the skin contact surface side, the adhesive layer is located on a surface on the non-skin contact surface side of the non-skin contact sheet or a surface on the skin contact surface side of the skin contact sheet, the functional layer is located on the skin contact surface side of the non-skin contact sheet, and at least a part of the adhesive layer is formed at a position that does not overlap with at least a part of the functional layer in a thickness direction of the functional sheet.

The functional article is a functional sheet in which at least a part of the adhesive layer is formed at a position not overlapping with at least a part of the functional layer in the thickness direction. Therefore, even if the lipophilic component of the functional layer diffuses into the adhesive layer, the amount of the lipophilic component that reaches the adhesive layer can be suppressed, and therefore the amount of the adhesive layer that dissolves in the lipophilic component can be suppressed. Thus, it is possible to suppress the adhesive agent from being strongly bonded to the skin surface or underwear of the wearer and remaining on the skin surface or underwear of the wearer even after the functional sheet is detached, while maintaining the effect of the functional layer, without reducing the amount of the lipophilic component of the functional layer or reducing the area of the functional layer.

[ means 9]

The functional article according to aspect 8, wherein the adhesive layer is formed at a position that does not overlap with at least a central portion of the functional layer in an in-plane direction of the functional sheet in a thickness direction of the functional sheet.

If the center portion of the functional layer in the in-plane direction overlaps with the adhesive layer in the thickness direction, and the adhesive layer corresponding to the center portion remains on underwear or skin, stains generated by the adhesive layer become more noticeable. Therefore, in the functional article (functional sheet) described above, the center portion in the in-plane direction of the functional layer is formed at a position not overlapping with the adhesive layer in the thickness direction. Therefore, even if the lipophilic component of the functional layer diffuses into the adhesive layer, the amount of the lipophilic component that reaches the adhesive layer can be suppressed, and therefore the amount of the adhesive layer that dissolves in the lipophilic component can be suppressed. This can prevent the adhesive layer from remaining in underwear or the like while maintaining the effect of the functional layer, and even if it remains, it can be made inconspicuous because it is not the central portion.

[ means 10]

The functional article according to aspect 8, wherein the adhesive layer is not present at both ends of the functional layer in the width direction of the functional sheet and at positions outside of both ends in a plan view.

When the adhesive layers are present at both ends in the width direction or at positions outside both ends, wrinkles may occur in the undergarment according to the movement of the wearer (for example, folding the legs), the functional layer may follow the wrinkles of the undergarment to cause wrinkles, and the functional layer may be separated from the body of the wearer, depending on the shape of the functional layer and the like. In the above-described functional article (functional sheet), the adhesive layer is not present at both ends in the width direction of the functional layer and at positions outside of both ends in a plan view. Therefore, the functional layer can be prevented from following the wrinkles of the undergarment, that is, from separating from the body of the wearer. This can further maintain the effect of the functional layer and prevent the adhesive layer from remaining in the undergarment.

[ means 11]

The functional article according to any one of aspects 8 to 10, wherein the functional layer is formed at a position that does not overlap with the adhesive layer in the thickness direction.

In the functional article (functional sheet) described above, the functional layer is formed entirely at a position not overlapping with the adhesive layer in the thickness direction. Therefore, even if the lipophilic component of the functional layer diffuses toward the non-skin contact surface side, the amount of the lipophilic component reaching the non-skin contact surface side of the liquid-impermeable sheet can be suppressed as much as possible, and therefore the amount of the adhesive layer dissolved in the lipophilic component can be greatly suppressed. This can significantly suppress the adhesive layer from remaining in the underwear while maintaining the effect of the functional layer.

[ means 12]

The functional article according to any one of aspects 8 to 11, wherein the skin contact sheet includes the functional layer, and the adhesive layer is located on a surface of the non-skin contact sheet on the non-skin contact surface side.

In the above-described functional article (functional sheet), since the functional layer is included in the skin contact sheet and the non-skin contact sheet is interposed between the functional layer and the adhesive layer, the amount of the lipophilic component that reaches the adhesive layer can be further suppressed as compared with a case where the functional layer is not included in the skin contact sheet. This can further suppress the adhesive layer from remaining in the underwear while maintaining the effect of the functional layer.

[ means 13]

The functional article according to any one of aspects 1 to 12, wherein the functional layer has a functional agent containing a functional component for activating a TRP channel and a solvent component, and the lipophilic component contains at least one of the functional component and the solvent component.

In the above functional article, the functional layer has a functional agent containing a functional component for activating the TRP channel. Therefore, when the functional article is worn, the functional article can stimulate the skin receptors to function as a functional agent without creating a temperature change on the body surface of the wearer. This can further maintain the effect of the functional layer and prevent the adhesive layer from remaining in the undergarment.

[ means 14]

The functional article according to mode 13, wherein the functional layer is a temperature-sensitive layer or a cold-sensitive layer; the temperature sensitive layer has a temperature sensitive agent containing a solvent component and a temperature sensitive component for activating the TRP channel; the cold feeling layer has a cold feeling agent containing a solvent component and a cold feeling component for activating the TRP channel.

In the above functional article, the functional layer is a temperature-sensitive layer or a cold-sensitive layer. Therefore, when the functional article is worn, the wearer can feel warm or cool without heating or cooling the functional article. This can further maintain the effect of the temperature-sensitive layer or the cool-sensitive layer, and can prevent the adhesive layer from remaining in the underwear.

[ means 15]

The functional article of means 14, wherein the warming agent is an agonist for the TRPV1 receptor and the cooling agent is an agonist for the TRPM8 receptor.

In the above functional articles, the warming agent is an agonist for the TRPV1 receptor and the cooling agent is an agonist for the TRPM8 receptor. Therefore, when the functional article is worn, the wearer can feel a temperature exceeding 43 ℃ which is the activation temperature threshold of the TRPV1 receptor or a temperature of 25 to 28 ℃ which is the activation temperature threshold of the TRPV8 receptor, without causing the functional article to generate heat or to cool. This can further maintain the effect of the temperature-sensitive layer or the cool-sensitive layer, and can prevent the adhesive layer from remaining in the underwear.

[ means 16]

The functional article according to any one of aspects 1 to 12, wherein the functional layer is a heat-generating layer having a heat-generating agent containing a heat-generating component and a solvent component, and the lipophilic component contains at least one of the heat-generating component and the solvent component.

In the above functional article, the functional layer has a heat generating agent containing a heat generating component. Therefore, the skin of the wearer can be heated when the functional article is worn, and the wearer can feel warm. This can suppress the adhesive layer from remaining in the underwear while maintaining the effect of the heat-generating layer.

(embodiment 1)

Hereinafter, an absorbent article, particularly a sanitary napkin, will be described as an example of the functional article according to embodiment 1. The temperature sensing function will be described as an example of a predetermined function included in a functional article. The temperature-sensitive function is a function of giving a wearer a temperature feeling through the skin, and is realized by a temperature-sensitive solution held on a sheet or the like, for example.

The structure of the sanitary napkin 1 according to the present embodiment will be described.

Fig. 1 to 3 are views showing a configuration example of a sanitary napkin 1 according to the present embodiment. Fig. 1 is a plan view of a sanitary napkin 1 in an unfolded state, fig. 2 is an exploded perspective view thereof, and fig. 3 is a schematic view of a worn state thereof. The sanitary napkin 1 has a longitudinal direction L, a width direction W, and a thickness direction T orthogonal to each other, has a longitudinal center line CL passing through the center of the width direction W and extending along the longitudinal direction L, includes an absorbent body 3 and a temperature-sensitive body 5 disposed in front of the absorbent body 3 in the longitudinal direction L, and is packaged with a packaging sheet 29. The sanitary napkin 1 includes, in the absorption body 3, a liquid-permeable sheet 7 which comes into contact with the skin of the wearer when worn, a liquid-impermeable sheet 9 which comes into contact with the clothing 19 when worn, and an absorbent body 11 which is disposed between the liquid-permeable sheet 7 and the liquid-impermeable sheet 9. The sanitary napkin 1 further includes, in the thermo-responsive body 5, a liquid-permeable sheet 7 which comes into contact with the skin of the wearer when worn, a liquid-impermeable sheet 9 which comes into contact with the garment 19 when worn, a thermo-responsive solution retaining sheet 13 which is disposed between the liquid-permeable sheet 7 and the liquid-impermeable sheet 9, and a shape retaining member 15 which is disposed at a position closer to the liquid-impermeable sheet 9 than the thermo-responsive solution retaining sheet 13. The shape retaining member 15 is a sheet that supports the temperature-sensitive solution retaining sheet 13 and retains the shape of the temperature-sensitive body 5. The temperature-sensitive solution holding sheet 13 is formed on the front side in the longitudinal direction L with respect to the region where the absorbent body 11 is provided. In another embodiment, the sanitary napkin 1 may not include the shape retaining member 15. The longitudinal direction L, the width direction W, and the thickness direction T of the sanitary napkin 1 can be similarly applied to the respective materials of the sanitary napkin 1 and the packaging sheet 29. When the sanitary napkin 1 is worn, the side of the sanitary napkin 1, the materials thereof, and the packaging sheet 29 that is relatively close to the skin is also referred to as the skin side, and the side that is relatively far from the skin is also referred to as the non-skin side.

The temperature-sensitive solution holding sheet 13 (functional layer) is formed of a sheet capable of holding a liquid, such as a nonwoven fabric, and contains a temperature-sensitive solution (not shown). The temperature-sensitive solution (functional agent) contains a solvent (solvent component) and a temperature-sensitive agent (temperature-sensitive component) that does not heat the body of the wearer of the sanitary napkin 1 or the vicinity thereof, but stimulates a temperature receptor of the skin (temperature-sensitive receptor) to give the wearer a temperature sensation. The warming solution contains a lipophilic component, for example at least one of the warming agent and the solvent contains a lipophilic component. When the sanitary napkin 1 is viewed in plan view, i.e., from above in the thickness direction T, the temperature-sensitive solution is contained in the entire temperature-sensitive solution holding sheet 13. The length of the thermo-sensitive solution holding sheet 13 in the width direction W is configured to be longer than the length of the absorbent body 11 in the width direction W. Thereby, the effect of the temperature-sensitive solution is spread to a region wider than the absorbent body 11 in the width direction W. In another embodiment, the temperature-sensitive solution is contained in a predetermined portion, for example, the central portion of the inner side excluding the peripheral portion, in a plan view, instead of the entire temperature-sensitive solution holding sheet 13.

The liquid-permeable sheet 7 of the absorption body 3 and the liquid-permeable sheet 7 of the temperature-sensitive body 5 are an integral sheet. Further, the liquid-impermeable sheet 9 of the absorbent main body 3 and the liquid-impermeable sheet 9 of the temperature-sensitive main body 5 are an integral sheet. Further, the absorber 11 of the absorption body 3 and the shape retaining member 15 of the temperature-sensitive body 5 are different members. Part of the absorbent body 11 and part of the shape retaining member 15 overlap each other in the overlapping portion 17 in the thickness direction T, and the absorbent body 11 is disposed closer to the liquid-permeable sheet 7 than the shape retaining member 15 in the overlapping portion 17. In another embodiment, the absorbent body 11 and the shape retaining member 15 may not overlap in the thickness direction T, and the overlapping portion 17 may not be provided.

Since the basic structure of the sanitary napkin 1 as a functional article is formed by at least the liquid-permeable sheet 7, the liquid-impermeable sheet 9, and the absorbent body 11, these can be referred to as "base materials". The skin-side surface of the liquid-permeable sheet 7 can be referred to as the skin contact surface of the base material or the sanitary napkin 1, and the non-skin-side surface of the liquid-impermeable sheet 9 is the surface opposite to the skin contact surface, and therefore can be referred to as the skin contact surface of the base material or the sanitary napkin 1. Therefore, the sanitary napkin 1 can have the temperature-sensitive solution holding sheet 13 along the skin contact surface at a position on the side of the base material closer to the skin contact surface than the non-skin contact surface.

In the sanitary napkin 1, the absorption body 3 has the same shape as a normal sanitary napkin, and the absorption body 3 is provided with a pair of wings 23, 23 extending from a substantially central portion in the longitudinal direction L to both outer sides in the width direction W. The sanitary napkin 1 includes an adhesive portion 21 (adhesive layer) for fixing the sanitary napkin 1 to the clothing 19 of the wearer in both the absorption body 3 and the temperature-sensitive body 5. One surface of the adhesive portion 21 is fixed to the liquid-impermeable sheet 9, and the other surface is temporarily fixed to the packaging sheet 29 of the sanitary napkin 1. The absorption body 3 includes, for example, adhesive portions 21-1 extending in the longitudinal direction L and intermittently arranged in the width direction W and adhesive portions 21-2 extending in the longitudinal direction L at substantially the center of the wing portions 23 in the width direction W, which are disposed in a region overlapping with the absorption body 11 in a plan view. On the other hand, the bonding portions 21-3 are disposed in the areas of both end portions in the width direction W in the temperature-sensitive body 5.

Here, the adhesive part 21 and the temperature-sensitive solution holding sheet 13 are formed at positions where at least part of the temperature-sensitive solution holding sheet 13 does not overlap with the adhesive part 21 in the thickness direction T and at least part of the adhesive part 21 does not overlap with the temperature-sensitive solution holding sheet 13 in the thickness direction T. For example, the adhesive part 21-3 and the temperature-sensitive solution holding sheet 13 are formed at positions where at least part of the temperature-sensitive solution holding sheet 13 does not overlap with the adhesive part 21-3 in the thickness direction T and at least part of the adhesive part 21-3 does not overlap with the temperature-sensitive solution holding sheet 13 in the thickness direction T. In other words, the temperature-sensitive solution holding sheet 13 and the adhesive portion 21-3 partially overlap each other or do not overlap each other at all in the thickness direction T. The same applies to the adhesive portions 21-1 and 21-2. In the present embodiment, the adhesive portions 21-1 to 21-3 and the temperature-sensitive solution holding sheet 13 are formed at positions that do not overlap in the thickness direction T.

For example, the adhesive portion 21-3 is formed at a position not overlapping with at least the central portion in the width direction W of the temperature-sensitive solution holding sheet 13 in the thickness direction T. Here, from the viewpoint of improving the temperature sensing function, the central portion in the width direction W of the temperature-sensitive solution holding sheet 13 is in a range from the longitudinal center line CL to both sides in the width direction W to 30%, preferably to 40%, and more preferably to 45% of the width in the width direction W of the temperature-sensitive solution holding sheet 13. In the present embodiment, the entire temperature-sensitive solution holding sheet 13 is formed not at a position overlapping with the adhesive portion 21-3 in the thickness direction T but at a central portion.

The sanitary napkin 1 is folded along the longitudinal direction 1-fold axis F extending along the longitudinal direction L together with the packaging sheet 29 before use₁And a length direction 2 nd folding axis F₂A width direction 1 st folding axis F extending along the width direction W₃Width direction 2 nd folding axis F₄And a width direction 3 rd folding axis F₅Is folded on the base axis to form an independent package (not shown) of the sanitary napkin 1. Wherein the 1 st folding axis F in the width direction₃A 2 nd folding axis F arranged in front of the sanitary napkin 1 in the width direction₄A 3 rd folding axis F arranged at the center of the sanitary napkin 1 and in the width direction₅Is disposed behind the sanitary napkin 1.

In addition, the width is squareFolding toward the 1 st axis F₃The sanitary napkin 1 and the packaging sheet 29 are arranged in an overlapped manner in the thickness direction T with the temperature sensitive solution retaining sheet 13 in the unfolded state. Longitudinal 1 st fold axis F₁And a length direction 2 nd folding axis F₂The sanitary napkin 1 and the wrapping sheet 29 are arranged so as not to overlap the absorbent body 11 in the thickness direction T but to overlap the temperature-sensitive solution retaining sheet 13 in the thickness direction T in the unfolded state.

The sanitary napkin 1 and the packaging sheet 29 are folded along the longitudinal 1 st folding axis F₁And a length direction 2 nd folding axis F₂Is folded substantially coaxially in the width direction W with the sanitary napkin 1 inside, and is then folded along the width direction 1 st fold axis F₃And a width direction 3 rd folding axis F₅For base-axis folding, followed by a width-wise 2 nd folding axis F₄Is folded on the base axis to form an independent package of the sanitary napkin 1.

The sanitary napkin 1 includes the seal portion 25 and the embossed portion 27, but these are well known in the art and therefore, the description thereof is omitted.

In the sanitary napkin 1, the non-skin side surface of the liquid-permeable sheet 7 and the skin side surfaces of the absorbent body 11 and the temperature-sensitive solution holding sheet 13 are bonded to each other with an adhesive (exemplified by a hot-melt adhesive) or the like, and the non-skin side surfaces of the absorbent body 11 and the shape retaining member 15 and the skin side surface of the liquid-impermeable sheet 9 are bonded to each other with an adhesive or the like. The peripheral edge of the non-skin side surface of the liquid-permeable sheet 7 and the peripheral edge of the skin side surface of the liquid-impermeable sheet 9 are bonded with an adhesive or the like. The non-skin side surface of the temperature-sensitive solution holding sheet 13 and the skin side surface of the shape retaining member 15 are joined by an adhesive or the like.

Next, a method of using the sanitary napkin 1 of the present embodiment will be described.

As shown in fig. 3, when the sanitary napkin 1 is worn by the wearer a, the absorbent body 3 has the same shape as a normal sanitary napkin, and therefore the sanitary napkin 1 can be fixed to the garment 19 (exemplified: shorts) so that the absorbent body 11 of the absorbent body 3 corresponds to the excretory opening contact region (not shown) of the wearer a. Thereby, the sanitary napkin 1 is fixed to the clothing 19 so that the temperature-sensitive body 5, particularly the temperature-sensitive solution retaining sheet 13, corresponds to the lower abdomen of the wearer a. The sanitary napkin 1 is used in a state where the skin contact surface of the temperature-sensitive body 5 is in contact with the skin of the lower abdomen of the wearer a.

In other words, the sanitary napkin 1 has such a shape: when the absorbent main body 3 is disposed on the garment 19 such that the excretory opening contact region (not shown) of the absorbent body 11 contacts the excretory opening contact region of the wearer a, the temperature sensitive solution retaining sheet 13 is disposed at a position corresponding to the lower abdomen of the wearer a. Therefore, the distance between the excretory opening contact region (not shown) of the absorbent body 11 of the absorbent body 3 and the temperature-sensitive solution retaining sheet 13 of the temperature-sensitive body 5 is substantially equal to the distance between the excretory opening and the lower abdomen (distance on the skin surface) of the wearer.

In the present embodiment, the temperature-sensitive solution (functional agent) of the temperature-sensitive solution holding sheet 13 contains a solvent (solvent component) and a temperature-sensitive agent (temperature-sensitive component) for activating the TRP channel. Therefore, when the sanitary napkin 1 is fixed to the clothing 19 for use, the temperature-sensitive solution contained in the temperature-sensitive solution holding sheet 13 is brought into contact with the skin of the wearer a through the liquid-permeable sheet 7, and the TRP channel in the temperature-sensitive agent contact portion of the skin of the wearer a which is in contact with the temperature-sensitive agent can be effectively activated, thereby effectively imparting a temperature sensation to the lower abdomen of the wearer.

When the TRP channel of the temperature sensitive agent contact portion of the skin of the lower abdomen of the wearer, which is in contact with the temperature sensitive agent, is activated by giving the temperature to the lower abdomen of the wearer, heat is generated from the temperature sensitive agent contact portion via the sympathetic nervous system, and the temperature of the temperature sensitive agent contact portion of the skin of the wearer can be expected to be increased. As a result, the site of the wearer near the uterus is heated to discharge the pain substance prostaglandin, and it is expected that the dysmenorrhea of the wearer is alleviated. In addition, by heating the portion of the wearer near the uterus, it is expected to reduce Premenstrual Syndrome (Premenstrual Syndrome), cold symptoms, climacteric disorders, and the like of the wearer. In addition, it is expected that metabolite excretion and cold syndrome can be improved, fat burning can be improved, immunity can be improved, and the like by promoting blood circulation (promoting lymphatic flow).

Here, in the case where the temperature-sensitive solution holding sheet 13 having the temperature-sensitive solution containing the lipophilic component is provided in the sanitary napkin 1, the temperature-sensitive solution holding sheet 13 is disposed at a position close to the skin in the sanitary napkin 1, for example, directly below the liquid-permeable sheet 7, in order to facilitate the function of the temperature-sensitive solution to act on the body of the wearer. On the other hand, the sanitary napkin 1 includes an adhesive portion 21 to be attached to underwear of a wearer. Here, when the temperature-sensitive solution holding sheet 13 and the adhesive portion 21 are close to each other in the sanitary napkin 1, a part of the lipophilic component of the temperature-sensitive solution in the temperature-sensitive solution holding sheet 13 may diffuse into the adhesive portion 21 (particularly, the adhesive portion 21-3) and come into contact with the adhesive portion 21. In this case, the adhesive portion 21 is locally dissolved in the lipophilic component and strongly bonded to the underwear of the wearer, and the adhesive layer may remain on the skin surface or underwear of the wearer even after the sanitary napkin 1 is removed. In this case, if the amount of the lipophilic component is reduced or the region of the temperature-sensitive solution holding sheet 13 is reduced, the effect of the temperature-sensitive component may be reduced.

Therefore, in the sanitary napkin 1 of the present embodiment, the temperature-sensitive solution holding sheet 13 and the adhesive portion 21 are formed at positions where at least part of the temperature-sensitive solution holding sheet 13 does not overlap with the adhesive portion 21 in the thickness direction and at least part of the adhesive portion 21 does not overlap with the temperature-sensitive solution holding sheet 13 in the thickness direction. Therefore, even if the lipophilic component of the temperature-sensitive solution retaining sheet 13 diffuses into the adhesive portion 21, the amount of the lipophilic component reaching the adhesive portion 21 can be suppressed, and thus the amount of the lipophilic component locally dissolved in the adhesive portion 21 can be suppressed. Further, since the part of the adhesive portion 21 is located at a position which is not easily affected by the lipophilic component and the strong bonding with the sanitary napkin 1 can be maintained, the part partially dissolved in the lipophilic component can be pulled by the part of the adhesive portion 21 maintaining the bonding and the part can be easily peeled off together when the sanitary napkin 1 is detached. This makes it possible to maintain the effect of the temperature-sensitive solution holding sheet 13 without reducing the amount of the lipophilic component of the temperature-sensitive solution holding sheet 13 or reducing the area of the temperature-sensitive solution holding sheet 13, and to prevent the adhesive portion 21 from strongly bonding to the wearer's undergarment and causing the adhesive portion 21 to remain in the wearer's undergarment even after the sanitary napkin 1 is removed.

In a preferred embodiment of the above embodiment, the temperature-sensitive solution holding sheet 13 is provided on the front side in the longitudinal direction L with respect to the region where the absorbent body 11 is provided. However, in another embodiment, the temperature-sensitive solution holding sheet 13 may be provided at a position on the rear side or both sides in the longitudinal direction L with respect to the region where the absorbent body 11 is provided.

In such a sanitary napkin 1, since the temperature-sensitive solution holding sheet 13 is formed at the front and rear sides in the longitudinal direction L, that is, at the abdomen and back, with respect to the absorbent body 11, deformation or the like due to the movement of the wearer's body is smaller than that in the case where it is formed at the position of the absorbent body 11. Therefore, strong adhesion is not required, and therefore the size of the adhesion portion 21 can be relatively reduced. Therefore, the temperature-sensitive solution holding sheet 13 and the adhesive part 21 can be easily arranged at positions that do not overlap with each other in the thickness direction. This can further suppress the adhesive part 21 from remaining in the underwear while maintaining the effect of the temperature sensitive solution holding sheet 13.

In a preferred embodiment of the above embodiment, the temperature-sensitive solution holding sheet 13 is formed at a position on the front side or the rear side in the longitudinal direction L with respect to the region where the absorbent body 11 is provided, and the adhesive portion 21 is formed at a position not overlapping with at least the central portion in the width direction W of the temperature-sensitive solution holding sheet 13 in the thickness direction T. However, the temperature-sensitive solution holding sheet 13 may be formed at a position on the rear side or both sides in the longitudinal direction L with respect to the region where the absorbent body 11 is provided.

In this way, when the temperature-sensitive solution holding sheet 13 is formed at the front side and the rear side in the longitudinal direction L with respect to the absorbent body 11, the temperature-sensitive function can be more effectively exerted on the abdomen and the back, but if the adhesive portion 21 remains in the underwear, the stain generated by the adhesive portion 21 may be more conspicuous. Therefore, in the sanitary napkin 1 described above, the adhesive portion 21 is formed at a position not overlapping with the central portion in the width direction W of the temperature-sensitive solution holding sheet 13 in the thickness direction, and therefore, the effect of the temperature-sensitive solution holding sheet 13 can be further enhanced, and the adhesive portion 21 can be prevented from remaining in underwear, and even if it remains, it can be made inconspicuous because it is not the central portion.

In another embodiment, the temperature-sensitive solution holding sheet 13 is preferably formed at a position on the front side or the rear side in the longitudinal direction L with respect to the region where the absorbent body 11 is provided, and the adhesive portions 21 are preferably not present at both ends in the width direction W of the temperature-sensitive solution holding sheet 13 and at positions outside of both ends in a plan view. However, the temperature-sensitive solution holding sheet 13 may be formed at a position on the rear side or both sides in the longitudinal direction L with respect to the region where the absorbent body 11 is provided.

In this case, if the adhesive portions 21 are present at both ends in the width direction W and at positions outside both ends, the undergarment may wrinkle when the wearer closes his or her legs, depending on the shapes of the temperature-sensitive body 5 and the temperature-sensitive solution holding sheet 13, the temperature-sensitive solution holding sheet 13 may also wrinkle following the wrinkles of the undergarment, and the temperature-sensitive solution holding sheet 13 may be separated from the body of the wearer. In the sanitary napkin 1 described above, the adhesive portions 21 are not present at both ends in the width direction W of the temperature-sensitive solution holding sheet 13 and at positions outside of both ends in a plan view. Therefore, the situation in which the temperature sensitive solution holding sheet 13 follows the wrinkles of the underwear, that is, the separation of the temperature sensitive solution holding sheet 13 from the wearer's body can be suppressed. This can further maintain the effect of the temperature-sensitive solution holding sheet 13, and can prevent the adhesive portion 21 from remaining in the underwear. Here, from the viewpoint of improving the temperature sensing function, both ends in the width direction W of the temperature-sensitive solution holding sheet 13 are in a range from both end edges in the width direction W on both sides of the longitudinal center line CL of the temperature-sensitive solution holding sheet 13 to the inside to 20%, preferably to 10%, more preferably to 5%, of the width in the width direction W of the temperature-sensitive solution holding sheet 13. In this case, the adhesive portion 21 is formed at, for example, a substantially central portion in the width direction W of the temperature-sensitive solution holding sheet 13 and at least one of both end portions in the longitudinal direction L or at least one of positions outside both end portions in the longitudinal direction L. Or formed substantially in the center of the in-plane direction (including the width direction W and the length direction L) of the temperature-sensitive solution holding sheet 13. Or at a plurality of positions obtained by combining the above positions. One or more bonding portions 21 may be provided. In this case, the shape and arrangement of the temperature sensitive solution holding sheet 13 can be adjusted according to the position of the adhesive portion 21 so that the temperature sensitive solution holding sheet 13 and the adhesive portion 21 are less overlapped or not overlapped.

In another embodiment, the temperature-sensitive solution holding sheet 13 is preferably formed at a position that does not overlap with the adhesive portion 21 at all in the thickness direction T.

In this case, in the sanitary napkin 1 described above, the entire temperature-sensitive solution holding sheet 13 is formed at a position not overlapping with the adhesive portion 21 in the thickness direction T. Therefore, even if the lipophilic component of the temperature-sensitive solution retaining sheet 13 diffuses toward the non-skin surface side (non-skin contact surface side), the amount of the lipophilic component reaching the non-skin surface side (non-skin contact surface side) of the liquid-impermeable sheet 9 can be suppressed to the utmost, and therefore the amount of the adhesive portion 21 dissolved in the lipophilic component can be suppressed to a large extent. This can significantly suppress the adhesive part 21 from remaining in the underwear while maintaining the effect of the temperature sensitive solution holding sheet 13.

In a preferred embodiment of the above embodiment, the temperature-sensitive solution holding sheet 13 is a liquid-retaining and liquid-permeable sheet member having a sheet shape, and the sheet member is positioned between the liquid-permeable sheet 7 and the liquid-impermeable sheet 9. In this case, the temperature-sensitive solution is contained in the entire temperature-sensitive solution holding sheet 13 in a plan view.

In the sanitary napkin 1, the temperature-sensitive solution retaining sheet 13 is formed separately from the liquid-permeable sheet 7 and the liquid-impermeable sheet 9. Therefore, the amount of the lipophilic component, the region of the temperature sensitive solution holding sheet 13, and the position can be formed more accurately. This can more reliably maintain the effect of the temperature-sensitive solution holding sheet 13 and more reliably prevent the adhesive portion 21 from remaining in the underwear. In another embodiment, the temperature-sensitive solution holding sheet 13 may be integrated with the liquid-permeable sheet 7, the liquid-impermeable sheet 9, the shape-retaining member 15, or the absorbent body 11, instead of being a sheet member. That is, the liquid-permeable sheet 7, the liquid-impermeable sheet 9, the shape-retaining member 15, or the absorbent body 11 may be coated with or impregnated with the temperature-sensitive solution. In this case, it is not necessary to provide a separate sheet member, and the sheet member forming step and the sheet member arranging step can be omitted.

In another embodiment, the temperature-sensitive solution may be contained in a predetermined portion of the temperature-sensitive solution holding sheet 13 instead of the entire temperature-sensitive solution holding sheet 13 in a plan view. For example, in a plan view, the temperature-sensitive solution may not be contained in the portion of the temperature-sensitive solution holding sheet 13 that overlaps the adhesive portion 21, and the temperature-sensitive solution may be contained in the portion that does not overlap the adhesive portion 21. Thus, even if the lipophilic component of the temperature-sensitive solution retaining sheet 13 diffuses toward the non-skin surface side (non-skin contact surface side), the amount of the lipophilic component reaching the adhesive portion 21 can be suppressed as much as possible. The amount of the adhesive portion 21 dissolved in the lipophilic component can be greatly suppressed.

In addition, as a preferable aspect of the above embodiment, the sanitary napkin 1 includes the shape retaining member 15 between the temperature sensitive solution retaining sheet 13 and the liquid impermeable sheet 9.

In the sanitary napkin 1, the shape retaining member 15 is provided between the temperature sensitive solution retaining sheet 13 and the adhesive portion 21. Therefore, even if the lipophilic component of the temperature-sensitive solution retaining sheet 13 diffuses to the non-skin surface side (non-skin contact surface side), the lipophilic component is blocked by the shape retaining member 15, and therefore the amount of the lipophilic component reaching the non-skin surface side (non-skin contact surface side) of the liquid-impermeable sheet 9 can be further suppressed, and the amount of the adhesive portion 21 dissolved in the lipophilic component can be further suppressed. This can significantly suppress the adhesive part 21 from remaining in the underwear while maintaining the effect of the temperature sensitive solution holding sheet 13.

(embodiment 2)

Hereinafter, a functional sheet, particularly a temperature-sensitive sheet, will be described as an example of the functional article according to embodiment 2. The temperature sensing function will be described as an example of a predetermined function included in a functional article.

The structure of the temperature-sensitive sheet 301 of the present embodiment will be described.

Fig. 4 to 6 are diagrams showing a configuration example of the temperature-sensitive sheet 301 according to the present embodiment. Fig. 4 is a perspective view of the temperature-sensitive sheet 301, fig. 5 is an exploded perspective view thereof, and fig. 6 is a schematic view of a worn state thereof. The temperature-sensitive sheet 301 has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other, and has a longitudinal center line CL that passes through the center of the width direction W and extends along the longitudinal direction L, and a width center line CW that passes through the center of the longitudinal direction L and extends along the width direction W. The temperature-sensitive sheet 301 includes, in order in the thickness direction T, a liquid-permeable sheet 307 (skin contact sheet) that contacts the skin of the wearer, a temperature-sensitive solution holding sheet 309 (non-skin contact sheet), a liquid-impermeable sheet 311 that contacts the garment 321, a bonding portion 313 that is fixed to the liquid-impermeable sheet 311 and that bonds the liquid-impermeable sheet 311 to the garment 321, and a release sheet 315 that temporarily fixes the bonding portion 313. The longitudinal direction L, the width direction W, and the thickness direction T of the temperature-sensitive sheet 301 can be similarly applied to the respective materials of the temperature-sensitive sheet 301. When wearing the temperature-sensitive sheet 301, the side of the temperature-sensitive sheet 301 that is relatively close to the skin is also referred to as the skin side, and the side that is relatively far from the skin is also referred to as the non-skin side.

The temperature-sensitive solution holding sheet 309 (functional layer) is formed of a sheet capable of holding a liquid such as a nonwoven fabric, and contains a temperature-sensitive solution (not shown). The temperature-sensitive solution (functional agent) contains a solvent (solvent component) and a temperature-sensitive agent (temperature-sensitive component) that does not heat the body of the wearer of the temperature-sensitive sheet 301 or the vicinity thereof but irritates the temperature receptors of the skin to make the wearer feel a temperature. The warming solution contains a lipophilic component, for example at least one of the warming agent and the solvent contains a lipophilic component. When the temperature-sensitive sheet 301 is viewed in a plan view, that is, from above in the thickness direction T, the temperature-sensitive solution is contained in the entire region 309a of the temperature-sensitive solution holding sheet 309 excluding the peripheral edge portion. In another embodiment, the temperature-sensitive solution is contained in a predetermined portion other than the entire region 309a of the temperature-sensitive solution holding sheet 309 in a plan view.

Since at least the liquid-permeable sheet 307 and the liquid-impermeable sheet 311 constitute a basic structure of the temperature-sensitive sheet 301 as the functional article, they can be referred to as a base material. The skin-side surface of the liquid-permeable sheet 307 can be referred to as the skin contact surface of the base material or the temperature-sensitive sheet 301, and the non-skin-side surface of the liquid-impermeable sheet 311 is the surface opposite to the skin contact surface, and therefore can be referred to as the skin-contact surface of the base material or the temperature-sensitive sheet 301. Therefore, the temperature-sensitive sheet 301 can have the temperature-sensitive solution holding sheet 309 along the skin contact surface at a position on the side of the base material closer to the skin contact surface than the non-skin contact surface.

In the temperature-sensitive sheet 301, the liquid-permeable sheet 307, the temperature-sensitive solution holding sheet 309, the liquid-impermeable sheet 311, and the release sheet 315 have the same shape of the outer peripheral edge in the planar direction (the longitudinal direction L and the width direction W). The liquid-permeable sheet 307, the temperature sensitive solution holding sheet 309, the liquid-impermeable sheet 311, and the release sheet 315 are overlapped so that their outer peripheral edges overlap in the thickness direction T. In another embodiment, at least one of the liquid-permeable sheet 307, the temperature sensitive solution-retaining sheet 309, the liquid-impermeable sheet 311, and the release sheet 315 may have an outer peripheral edge having a different shape in the planar direction (the longitudinal direction L and the width direction W). For example, the temperature-sensitive solution holding sheet 309 is smaller than the other sheets by one turn.

The bonding portion 313 is formed of a plurality of bonding portions 314 extending in the width direction W, is located inside the outer peripheral edge of the temperature sensitive sheet 301 as a whole in a plan view, and has a ring shape having a predetermined width along the outer peripheral edge. The bonding portion 313 (a plurality of bonding portions 314) is not present in the inner portion, i.e., the central portion, of the ring. The plurality of bonding portions 314 are arranged with a predetermined interval in the longitudinal direction L. The release sheet 315 is disposed so as to cover the entire adhesive portion 313 (the plurality of adhesive portions 314) including the central portion where the adhesive portion 313 does not exist. In another embodiment, the bonding portion 313 may be formed integrally and continuously without being separated like the plurality of bonding portions 314, and may have a ring shape having a predetermined width along the outer peripheral edge of the temperature-sensitive sheet 301 in a plan view.

Here, the adhesive portion 313 and the temperature-sensitive solution holding sheet 309 are formed at positions where at least part of the temperature-sensitive solution holding sheet 309 does not overlap with the adhesive portion 313 in the thickness direction T and at least part of the adhesive portion 313 does not overlap with the temperature-sensitive solution holding sheet 309 in the thickness direction T. For example, the adhesive portion 313 and the temperature-sensitive solution holding sheet 309 are formed at positions where at least part of the temperature-sensitive solution holding sheet 309 does not overlap with the adhesive portion 313 in the thickness direction T and at least part of the adhesive portion 313 does not overlap with the temperature-sensitive solution holding sheet 309 in the thickness direction T. In other words, the temperature-sensitive solution holding sheet 309 and the adhesive portion 313 partially overlap each other or do not overlap each other at all in the thickness direction T. In the present embodiment, the adhesive portion 313 and the temperature-sensitive solution holding sheet 309 are formed at positions that do not overlap in the thickness direction T.

For example, the adhesive portion 313 is formed at a position not overlapping with at least the central portion 309a in the in-plane direction (including the longitudinal direction L and the width direction W) of the temperature-sensitive solution holding sheet 309 in the thickness direction T. Here, from the viewpoint of improving the temperature sensing function, the center portion in the in-plane direction of the temperature-sensitive solution holding sheet 309 is in the range of 30%, preferably in the range of up to 40%, and more preferably in the range of up to 45% of the width in the width direction W of the temperature-sensitive solution holding sheet 13 from the longitudinal center line CL to both sides in the width direction W. The longitudinal direction L is a range from the widthwise center line CW to both sides of the longitudinal direction L to 30%, preferably to 40%, and more preferably to 45% of the longitudinal direction L of the temperature-sensitive solution holding sheet 309. In another embodiment, when the temperature-sensitive solution holding sheet 309 is smaller than the other sheet material by one turn, the adhesive portion 313 may be located outside the outer peripheral edge of the temperature-sensitive solution holding sheet 309 as a whole in a plan view and have a ring shape having a predetermined width along the outer peripheral edge, for example.

In the temperature-sensitive sheet 301, the non-skin side surface of the liquid-permeable sheet 307 and the skin side surface of the temperature-sensitive solution holding sheet 309 are bonded to each other with an adhesive (hot melt adhesive, for example), and the non-skin side surface of the temperature-sensitive solution holding sheet 309 and the skin side surface of the liquid-impermeable sheet 311 are bonded to each other with an adhesive or the like.

Next, a method of using the temperature sensitive sheet of the present embodiment will be described.

As shown in fig. 6, when the wearer a uses the temperature-sensitive sheet 301, the temperature-sensitive sheet 301 is taken out from the individual package (not shown), and the release sheet 315 is peeled off from the temperature-sensitive sheet 301. Next, the wearer a fixes the adhesive portion 313 of the temperature-sensitive sheet 301 to the inner surface of the clothing 321 (exemplified by shorts). Thereby, the temperature-sensitive sheet 301 is fixed to the clothing 321 so that the temperature-sensitive solution holding sheet 309 corresponds to the abdomen of the wearer a. Then, the temperature-sensitive sheet 301 is used in a state where the skin contact surface of the temperature-sensitive sheet 301 is in contact with the skin of the abdomen of the wearer a.

In the present embodiment, the temperature-sensitive solution (functional agent) of the temperature-sensitive solution holding sheet 309 contains a solvent (solvent component) and a temperature-sensitive agent (temperature-sensitive component) for activating the TRP channel. Therefore, when the temperature-sensitive sheet 301 is fixed to the clothing 321 for use, the temperature-sensitive solution contained in the temperature-sensitive solution holding sheet 309 permeates the liquid-permeable sheet 307 and comes into contact with the skin of the wearer a, and the TRP channel in the temperature-sensitive agent contact portion of the skin of the wearer a that comes into contact with the temperature-sensitive agent is effectively activated, and the temperature sensation can be effectively imparted to the lower abdomen of the wearer.

By bringing a temperature sensation to the lower abdomen of the wearer, the TRP channel of the temperature sensitive agent contact portion of the skin of the lower abdomen of the wearer, which is in contact with the temperature sensitive agent, is activated, and as a result, heat is generated from the temperature sensitive agent contact portion via the sympathetic nervous system, and it is expected that the temperature of the temperature sensitive agent contact portion of the skin of the wearer will be raised. As a result, the same effects as those of embodiment 1 can be obtained when the wearer is female. On the other hand, in the case where the wearer is a male, it is expected that prostaglandin, which is a pain substance, is discharged, and muscle tension is alleviated, thereby alleviating muscle pain. In addition, it is expected that metabolite excretion and cold syndrome can be improved, fat burning can be improved, immunity can be improved, and the like by promoting blood circulation (promoting lymphatic flow).

In the temperature-sensitive sheet 301, at least part of the adhesive portion 313 is formed at a position that does not overlap with at least part of the temperature-sensitive solution holding sheet 309 in the thickness direction T. Therefore, even if the lipophilic component of the temperature-sensitive solution retaining sheet 309 diffuses into the adhesive portion 313, the amount of the lipophilic component that reaches the adhesive portion 313 can be suppressed, and therefore the amount of the adhesive portion 313 dissolved in the lipophilic component can be suppressed. This makes it possible to maintain the effect of the temperature-sensitive solution holding sheet 309 without reducing the amount of the lipophilic component in the temperature-sensitive solution holding sheet 309 or reducing the area of the temperature-sensitive solution holding sheet 309, and to prevent the adhesive portion 313 from strongly bonding to the wearer's undergarment and causing the adhesive portion 313 to remain in the wearer's undergarment even after the temperature-sensitive sheet 301 is removed.

In a preferred embodiment of the above embodiment, the adhesive portion 313 is formed at a position not overlapping with at least the center portion in the in-plane direction of the temperature-sensitive solution holding sheet 309 in the thickness direction T.

If the center portion in the in-plane direction of the temperature-sensitive solution holding sheet and the adhesive portion overlap in the thickness direction, and the adhesive portion corresponding to the center portion remains in underwear and skin, stains generated in the adhesive portion may be more noticeable. Therefore, in the temperature-sensitive sheet 301 described above, the center portion in the in-plane direction of the temperature-sensitive solution holding sheet 309 is formed at a position not overlapping with the adhesive portion 313 in the thickness direction T. Therefore, even if the lipophilic component of the temperature-sensitive solution retaining sheet 309 diffuses into the adhesive portion 313, the amount of the lipophilic component that reaches the adhesive portion 313 can be suppressed, and therefore the amount of the adhesive portion 313 dissolved in the lipophilic component can be suppressed. This can prevent the adhesive part 313 from remaining in underwear or the like while maintaining the effect of the temperature-sensitive solution holding sheet 309, and even if it remains, it can be made inconspicuous because it is not the central part.

In another embodiment, the adhesive portion 313 may be disposed so as not to be present at both ends in the width direction W of the temperature-sensitive sheet 301 of the temperature-sensitive solution holding sheet 309 in plan view and at positions outside the both ends.

If the adhesive sections are present at both ends in the width direction and at positions outside both ends, the undergarment may wrinkle in accordance with the movement of the wearer (for example, folding the legs), the temperature-sensitive solution holding sheet may also wrinkle in accordance with the wrinkles of the undergarment, and the temperature-sensitive solution holding sheet may be separated from the body of the wearer. Therefore, in the above-described temperature-sensitive sheet 301, the adhesive portion 313 may be disposed so as not to be present at both ends in the width direction W of the temperature-sensitive solution holding sheet 309 and at positions outside both ends in a plan view. In this case, the situation in which the temperature-sensitive solution holding sheet 309 follows wrinkles of the underwear, that is, the separation of the temperature-sensitive solution holding sheet 309 from the body of the wearer can be suppressed. This can further maintain the effect of the temperature-sensitive solution holding sheet 309, and can prevent the adhesive portion 313 from remaining in the underwear. Here, from the viewpoint of improving the temperature sensing function, both end portions in the width direction W of the temperature-sensitive sheet 301 of the temperature-sensitive solution holding sheet 309 are in a range from both end edges in the width direction W on both sides of the longitudinal center line CL of the temperature-sensitive solution holding sheet 309 to the inside to 20%, preferably to 10%, more preferably to 5%, of the width in the width direction W of the temperature-sensitive solution holding sheet 309, respectively. In this case, the adhesive portion 313 is formed at least at one of both ends in the longitudinal direction L or at least at a position outside both ends in the longitudinal direction L, for example, at a substantially central portion in the width direction W of the temperature sensitive solution holding sheet 309. Or formed at the substantially central portion in the in-plane direction (including the width direction W and the length direction L) of the temperature-sensitive solution holding sheet 309. Or at a plurality of positions obtained by combining the above positions. The number of the bonding portions 313 may be one or plural. In this case, the shape and arrangement of the temperature-sensitive solution holding sheet 309 are adjusted in accordance with the position of the adhesive portion 313 so that the overlapping of the temperature-sensitive solution holding sheet and the adhesive portion 313 is reduced or prevented.

As a preferable aspect in the above embodiment, the temperature-sensitive solution holding sheet 309 is formed at a position not overlapping with the adhesive portion 313 in the thickness direction T.

In the temperature-sensitive sheet 301 described above, the entire temperature-sensitive solution holding sheet 309 is formed at a position not overlapping with the adhesive portion 313 in the thickness direction. Therefore, even if the lipophilic component of the temperature-sensitive solution retaining sheet 309 diffuses toward the non-skin contact surface side, the amount of the lipophilic component reaching the non-skin contact surface side of the liquid-impermeable sheet can be extremely suppressed, and therefore the amount of the adhesive portion 313 dissolved in the lipophilic component can be greatly suppressed. This can significantly suppress the adhesive part 313 from remaining in the underwear while maintaining the effect of the temperature sensitive solution holding sheet 309.

In another embodiment, the liquid-permeable sheet 307 may include a temperature-sensitive solution holding sheet 309, that is, the liquid-permeable sheet 307 and the temperature-sensitive solution holding sheet 309 may be integrated. For example, the liquid-permeable sheet 307 may contain a temperature-sensitive solution, or a temperature-sensitive solution holding sheet 309 may be used instead of the liquid-permeable sheet 307.

In this case, in the above-described temperature-sensitive sheet, since the temperature-sensitive solution holding sheet 309 is included in the liquid-permeable sheet 307 and the liquid-impermeable sheet 311 is interposed between the pressure-sensitive sheet and the adhesive portion 313, the amount of the lipophilic component that reaches the adhesive portion 313 can be further suppressed as compared with the case where it is not. This can further suppress the adhesive portion 313 from remaining in the underwear while maintaining the effect of the temperature sensitive solution holding sheet 309.

In each of the above embodiments, the functional component contained in the functional agent is a temperature sensitive agent. However, the present invention is not limited to this example, and at least one of the functional component and the solvent component contained in the functional agent may contain a lipophilic component, and the type of the functional component may be other types, for example, a cold feeling agent or a heat generating agent. In the case of using a cooling agent, the functional layer has, for example, a cooling solution containing a cooling agent and a solvent component. In the case of using the heat generating agent, the functional layer has, for example, a heat generating solution containing the heat generating agent and a solvent component.

(materials of functional articles, etc.)

Next, materials and the like of the functional article according to each of the above embodiments will be described.

The functional layer of each of the above embodiments has a functional agent containing a solvent component and a functional component for activating a TRP channel.

For example, the temperature sensitive solution contains a solvent and a temperature sensitive agent for activating the TRP channel. The above-mentioned thermosensor is not particularly limited as long as it can activate a TRP channel, and examples thereof include an agonist for TRPV1 receptor, an agonist for TRPV3 receptor and the like, and preferably an agonist for TRPV 1. This is because the activation temperature threshold of TRPV1 receptor is higher than 43 ℃, and this can bring a high temperature sensation to the wearer.

The temperature sensitive agent is preferably a plant-derived compound from the viewpoint of the feeling of comfort of the wearer. Examples of the aforementioned sensates include capsaicin, capsaicinoids (dihydrocapsaicin, nordihydrocapsaicin, homodihydrocapsaicin, homocapsaicin, synthetic capsaicin, etc.), capsanthin, benzyl nicotinate, β -butoxyethyl nicotinate, N-acylvanillylamide, vanillylnonamide, polyhydric alcohols, paprika, capsicum tincture, capsicum extract, vanillyl nonanoate, vanillyl alcohol alkyl ether derivatives (e.g., vanillyl ethyl ether, vanillyl alcohol butyl ether, vanillyl alcohol pentyl ether, vanillyl alcohol hexyl ether), isovanillyl alcohol alkyl ether, ethyl vanillyl alcohol alkyl ether, veratryl alcohol derivatives, substituted benzyl alcohol alkyl ethers, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, ginger extract, ginger oil, gingerol, zingerone, hesperidin and pyrrolidone carboxylic acid, and any combination thereof.

The temperature-sensitive agent is preferably not capsaicin, and more preferably vanillyl alcohol alkyl ether derivatives (e.g., vanillyl alcohol ethyl ether, vanillyl alcohol butyl ether, vanillyl alcohol pentyl ether, vanillyl alcohol hexyl ether), ginger extract, ginger oil, gingerol and zingerone, and any combination thereof, from the viewpoint of making the wearer feel pain less likely.

For example, the cold feeling solution contains a solvent and a cold feeling agent for activating the TRP channel. The psychrotolerant is not particularly limited as long as it can activate a TRP channel, and examples thereof include an agonist for the TRPM8 receptor, an agonist for the TRPA1 receptor, and the like, and preferably an agonist for the TRPM8 receptor. This is because the wearer can be prevented from being excessively cooled.

Examples of the psychrophilic agents include menthol (e.g., l-menthol) and derivatives thereof (e.g., menthyl lactate, menthyl glyceryl ether, e.g., l-menthyl glyceryl ether), methyl salicylate, camphor, essential oils derived from plants (e.g., mint, eucalyptus), and the like.

The solvent is not particularly limited as long as it can contain the temperature sensitive agent and the cooling agent, and examples thereof include a lipophilic solvent and a hydrophilic solvent. The solvent can dissolve or disperse the temperature sensitive agent and the cooling agent, for example.

Examples of the lipophilic solvent include oils and fats, natural oils (e.g., fatty acid esters such as triglycerides, coconut oil, linseed oil, and the like), and hydrocarbons (e.g., paraffin, e.g., liquid paraffin).

Examples of the hydrophilic solvent include water and alcohols. Examples of the alcohols include lower alcohols such as methanol, ethanol, ethylene glycol and glycerol, and higher alcohols such as octanol, lauryl alcohol and myristyl alcohol.

The solvent is preferably an oil or fat (lipophilic solvent) or an alcohol (hydrophilic solvent) from the viewpoint of easy control of volatility, particularly easy reduction of volatility. In the case where the functional article is an absorbent article, the solvent is preferably a lipophilic solvent in view of not easily impairing the absorbency.

The proportion of the temperature-sensitive solution or the cooling-sensitive solution containing the temperature-sensitive agent or the cooling-sensitive agent is preferably 0.0001 to 5.0% by mass, more preferably 0.0005 to 3.0% by mass, even more preferably 0.1 to 1.0% by mass, and even more preferably 0.3 to 0.7% by mass. This is from the viewpoint of the effect of the temperature or cold feeling.

The weight per unit area of the temperature sensitive agent or the cold sensitive agent is preferably 0.001g/m²～10g/m²More preferably 0.003g/m²～5g/m²More preferably 0.01g/m²～2.5g/m²More preferably 0.05g/m²～1.5g/m²Such a weight per unit area contains a temperature-sensitive solution or a cold-sensitive solution. This is from the viewpoint of giving a wearer a feeling of warmth or coolness.

In the functional article of the present invention, the temperature-sensitive solution or the cold-sensitive solution may contain at least one other component described below in a range not impairing the effect of imparting a temperature or a cold to the wearer in addition to the temperature-sensitive agent or the cold-sensitive agent and the solvent.

Examples of the at least one other component include a coolant, for example, a coolant that reduces the ambient temperature by absorbing the heat of vaporization, and examples of the coolant include alcohols, for example, methanol and ethanol. Examples of the at least one other component include silicone oil, silicone-based resin, and the like. Examples of the at least 1 other component include antioxidants, for example, BHT (2, 6-di-tert-butyl-p-cresol), BHA (butyl hydroxyanisole), propyl gallate, and the like. .

Examples of the at least one other component include vitamins, for example, natural vitamins, and synthetic vitamins. Examples of the vitamins include water-soluble vitamins, for example, vitamin B group, for example, vitamin B₁Vitamin B₂Vitamin B₃Vitamin B₅Vitamin B₆Vitamin B₇Vitamin B₉Vitamin B₁₂Etc., vitamin C. Examples of the vitamins include fat-soluble vitamins, such as vitamin a group, vitamin D group, vitamin E group, and vitamin K group. The above vitamins also include their derivatives.

Examples of the at least 1 other component include amino acids such as alanine, arginine, lysine, histidine, proline, and hydroxyproline, and peptides. Examples of the at least 1 other component include natural zeolites such as analcime, chabazite, heulandite, natrolite, mordenite and thomsonite, and zeolites such as synthetic zeolites. Examples of the at least 1 other component include cholesterol, hyaluronic acid, lecithin, ceramide, placenta, collagen, elastin, squalane, vaseline, trehalose, and the like.

Examples of the at least 1 other component include a skin astringent, an anti-acne agent, an anti-wrinkle agent, an anti-cellulite agent, a whitening agent, an antibacterial agent, and an antifungal agent. Examples of the skin astringent include zinc oxide, aluminum sulfate, and tannic acid, and examples of the oil-soluble skin astringent include oil-soluble polyphenols. Examples of the oil-soluble polyphenol include natural oil-soluble polyphenols such as phellodendron extract, Hypericum erectum extract, Lampetra brachypomum extract, Chamomilla recutita extract, Burdock extract, Salvia officinalis extract, Tilia tilis extract, Tilia miqueliana extract, Betula platyphylla extract, Equisetum arvense extract, Salvia officinalis extract, Juglans regia extract, Hibiscus syriacus extract, Eriobotrya japonica extract, Tilia latifolia extract, Humulus lupulus extract, Aesculus hippocastanum extract, and Coix lacryma-jobi extract. Examples of the acne-removing agent include salicylic acid, benzoyl peroxide, resorcinol, sulfur, erythromycin, zinc, and the like. Examples of the anti-wrinkle agent include lactic acid, salicylic acid derivatives, glycolic acid, phytic acid, lipoic acid, and lysophosphatidic acid. Examples of the anti-cellulite agent include xanthine compounds such as aminophylline, caffeine, theophylline, and theobromine. Examples of the whitening agent include niacinamide, kojic acid, arbutin, glucosamine and derivatives thereof, phytosterol derivatives, ascorbic acid and derivatives thereof, mulberry extract and placenta extract.

Examples of the at least 1 other component include an anti-inflammatory component, a pH adjuster, an antibacterial agent, a humectant, a perfume, a pigment, a dye, a pigment, a plant extract, and the like. Examples of the anti-inflammatory component include natural anti-inflammatory agents such as extracts of peony, scutellaria, forsythia, chamomile, licorice, peach leaf, wormwood, and perilla, and synthetic anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate. Examples of the pH adjuster include pH adjusters for keeping the skin weakly acidic, such as malic acid, succinic acid, citric acid, tartaric acid, and lactic acid. Examples of the pigment include titanium oxide.

The functional article and the temperature-sensitive solution of the present invention preferably do not contain a heat generating agent. By this arrangement, the wearer is less likely to suffer low-temperature burns. Further, since the functional article itself does not generate heat, the adhesive portion for fixing the functional article to clothing or skin is not easily softened, and when the functional article is used and the functional article is detached from clothing, wearer's skin, or the like, the adhesive portion of the functional article is not easily left on clothing or skin. The heat generating agent is not particularly limited as long as the heat generating agent itself generates heat and has an oil-impregnated component in a substance thereof, a solvent thereof, or a chemical for fixing the substance or the solvent to a sheet or the like, and examples thereof include chemicals utilizing chemical energy such as oxidation heat of metal powder (e.g., iron powder), neutralization heat of acid and alkali, water and heat of inorganic salt, and the like.

In the functional article of the present invention, the material of the liquid-permeable sheet is not particularly limited as long as it has liquid permeability, and examples thereof include a fabric (e.g., nonwoven fabric, woven fabric, knitted fabric), and an apertured film. The fabric is preferably a nonwoven fabric from the viewpoint of ease of the method for producing the functional article. Examples of the nonwoven fabric include airlaid pulp, through-air nonwoven fabric, spunbond nonwoven fabric, point-bond nonwoven fabric, spunlace nonwoven fabric, needle-punched nonwoven fabric, meltblown nonwoven fabric, and a combination of these nonwoven fabrics (e.g., SMS).

Examples of the fibers constituting the fabric include natural fibers, synthetic fibers, and semi-synthetic fibers. Examples of the natural fibers include pulp fibers and regenerated cellulose fibers. Examples of the regenerated cellulose fibers include rayon fibers such as viscose rayon obtained from viscose, tiger kapok, and modal, and cuprammonium rayon fibers (also referred to as "cuprammonium fibers") obtained from a cuprammonium solution of cellulose; lyocell fibers and tencel fibers obtained by an organic solvent spinning method using an organic solvent which is a mixed solution of an organic compound and water without the use of a cellulose derivative. Examples of the semi-synthetic fibers include semi-synthetic cellulose fibers such as acetate fibers, and for example, triacetate fibers and diacetate fibers. Examples of the synthetic fibers include heat-fusible fibers, polyolefin polymers, polyethylene or polypropylene; polyester-based polymers such as terephthalic-based polymers such as polyethylene terephthalate (PET), polybutylene terephthalate, and polybutylene terephthalate; polyamide-based polymers such as nylon 6 or nylon 6, 6; an acrylic polymer; a polyacrylonitrile-based polymer; or a modified product of the above substances or a combination of the above substances. Examples of the apertured film include films having a plurality of apertured parts formed in a sheet of polyethylene or polypropylene.

The liquid-permeable sheet preferably has a thickness of 10g/m²～100g/m²More preferably 20g/m²～50g/m²Weight per unit area of (c).

In the functional article of the present invention, the material of the liquid-impermeable sheet is not particularly limited as long as it has liquid-impermeability, and examples thereof include a film, a film made of, for example, polyethylene or polypropylene, a resin film having air permeability, a structure in which a resin film having air permeability is joined to a nonwoven fabric such as spun-bonded nonwoven fabric or spunlaced nonwoven fabric, and a multi-layer nonwoven fabric such as SMS.

The above liquid-impermeable sheet preferably has a thickness of 10g/m²～50g/m²More preferably 15g/m²～30g/m²Weight per unit area of (c).

The functional article of the present invention can include an additional member, such as an intermediate sheet (e.g., a temperature-sensitive solution-retaining sheet), an absorber, and the like, between the liquid-permeable sheet and the liquid-impermeable sheet. Examples of the material of the intermediate sheet include materials listed as the material of the liquid-permeable sheet. The intermediate sheet may contain a temperature-sensitive solution, that is, may be a temperature-sensitive solution holding sheet or may not contain a temperature-sensitive solution. When the intermediate sheet is used as the temperature-sensitive solution holding sheet and the solvent of the temperature-sensitive solution is a lipophilic solvent, the intermediate sheet may be a fabric made of synthetic fibers, such as a nonwoven fabric, a woven fabric, a knitted fabric, or the like, or may be a nonwoven fabric made of synthetic fibers, for example. In the case where the intermediate sheet is used as the temperature-sensitive solution holding sheet and the solvent of the temperature-sensitive solution is a hydrophilic solvent, the intermediate sheet may be a fabric made of a cellulose-based fiber, such as a nonwoven fabric, a woven fabric, or a knitted fabric, or may be a tissue paper made of pulp fiber, an air-laid pulp, or the like.

Examples of the absorbent include a structure in which a core-covering layer covers an absorbent core containing pulp fibers and a polymeric absorbent, a structure in which a core-covering layer covers an absorbent core containing a polymeric absorbent or an absorbent core made of a polymeric absorbent, and the like. The core-clad layer may be the intermediate sheet. As a temperature-sensitive article provided with the absorber, an absorbent article can be mentioned.

The above-mentioned intermediate sheet preferably has a thickness of 10g/m²～200g/m²More preferably 15g/m²～150g/m²Weight per unit area of (c).

The functional article of the present invention may include an adhesive portion for fixing the functional article to clothing or the skin of a wearer, and examples of the adhesive portion include a hot-melt adhesive, for example, a pressure-sensitive adhesive or a heat-sensitive adhesive mainly composed of rubber such as styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS) or styrene-isoprene-styrene (SIS), or mainly composed of olefin such as linear low-density polyethylene; and water-sensitive adhesives comprising a water-soluble polymer (e.g., polyvinyl alcohol, carboxymethyl cellulose, gelatin, etc.) or a water-swellable polymer (e.g., polyvinyl acetate, sodium polyacrylate, etc.).

The functional article of the present invention is preferably packaged with a packaging sheet before use. This is from the viewpoint of protecting the temperature-sensitive solution held by the functional article, the viewpoint of preventing the temperature-sensitive solution held by the functional article from leaking to the outside, and the like. For example, the functional article of the present invention is preferably a package in which one or more functional articles are packaged by a packaging sheet, and more preferably an independent package in which one functional article is packaged by a packaging sheet. Examples of the material of the packaging sheet include polyolefin polymers, such as polyethylene and polypropylene. From the viewpoint of improving the airtightness of the individual package, the package sheet may include an inner liner, and examples of the material of the inner liner include ethylene vinyl alcohol polymers, vinylidene chloride polymers, such as vinylidene chloride methyl acrylate polymers, polyvinyl alcohol, nylon, such as nylon 6, aluminum foil, and a base film (such as polyethylene terephthalate) on which alumina, silica, and the like are vapor-deposited.

The functional article of the present invention is not particularly limited as long as it contains a temperature-sensitive solution, and examples thereof include an absorbent article and a temperature-sensitive sheet. The absorbent article is not particularly limited, and examples thereof include articles provided with an absorbent body, such as sanitary napkins, pants-type sanitary napkins, pantiliners, disposable diapers, incontinence pads, interlabial pads, tampons, mattress pads, breast pads, hemorrhoid pads, sweat barriers, bedsore sheets (dressing sheets), pet diapers, and pet sheets.

In the absorbent article, the temperature-sensitive solution may be disposed at any position such that the temperature-sensitive solution partially overlaps the adhesive portion in the thickness direction but does not overlap the entire surface of the absorbent body, such as at a position where the temperature-sensitive solution does not overlap the absorbent body in the thickness direction of the absorbent article, or at a position where the temperature-sensitive solution overlaps the absorbent body in the thickness direction of the absorbent article. In the absorbent article, the temperature sensitive solution may be held in the liquid-permeable sheet, the intermediate sheet, the absorbent body, and the like. Generally, the absorbent article includes a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body between the liquid-permeable sheet and the liquid-impermeable sheet.

Examples of the temperature-sensitive sheet include a garment-fixing type temperature-sensitive sheet (for example, a temperature-sensitive sheet having a pressure-sensitive portion for fixing to the garment of the wearer on a garment contact surface of a liquid-impermeable sheet, and using the pressure-sensitive portion by sticking the pressure-sensitive portion to an inner surface of the garment), and a skin-fixing type temperature-sensitive sheet (for example, a temperature-sensitive sheet having a pressure-sensitive portion for fixing to the skin of the wearer on a skin contact surface of a liquid-permeable sheet (for example, a peripheral edge portion of the temperature-sensitive sheet), and using the pressure-sensitive sheet by sticking the pressure-sensitive portion to the skin of the wearer).

The clothing to be fixed to the clothing-fixing type temperature-sensitive sheet is not particularly limited, and examples thereof include clothing which has a portion directly contacting the skin of the wearer and is preferably used by being attached to the wearer. Examples of the clothing include underwear (e.g., shorts, shirts, bras, etc.), outerwear (e.g., coats, undergarments), socks, gloves, scarves, masks, eye patches, and the like.

The part of the heat sensitive sheet that can provide a heat sensation is not particularly limited, and examples thereof include a head (e.g., a face, e.g., eyes), a neck, an upper limb (e.g., a chest, an abdomen, an inguinal region, a back, a waist, a forearm, and a hand), a lower limb (e.g., a thigh, a calf, and a foot).

In the above-mentioned temperature-sensitive sheet, the temperature-sensitive solution may be held in the liquid-permeable sheet, the above-mentioned intermediate sheet, or the like. Generally, the temperature-sensitive sheet includes at least a liquid-impermeable sheet and a liquid-permeable sheet.

Description of the reference numerals

1. A sanitary napkin; 7. a liquid-permeable sheet; 13. a temperature-sensitive solution holding sheet; 21. and an adhesive portion.

Claims (12)

1. A functional article, comprising: a base material having a skin contact surface and a non-skin contact surface on the side opposite to the skin contact surface; and an adhesive layer formed on the skin contact surface or the non-skin contact surface of the base material, characterized in that,

the functional article includes a functional layer having a predetermined function along the skin contact surface at a position on the side of the base material closer to the skin contact surface than the non-skin contact surface,

the functional layer has a functional agent containing a lipophilic component,

the functional layer and the adhesive layer are formed at positions where at least part of the functional layer and the adhesive layer do not overlap in the thickness direction of the functional article and at least part of the adhesive layer and the functional layer do not overlap in the thickness direction of the functional article.

2. The functional article according to claim 1,

the functional article is an absorbent article,

the base material comprises a liquid-permeable sheet positioned on the skin contact surface side, a liquid-impermeable sheet positioned on the non-skin contact surface side, and an absorbent body positioned between the liquid-permeable sheet and the liquid-impermeable sheet,

the adhesive layer is positioned on the surface of the liquid-impermeable sheet on the non-skin contact surface side,

the functional layer is positioned closer to the skin contact surface side than the liquid-impermeable sheet,

the functional layer is formed at a position not overlapping with the absorber in the thickness direction.

3. The functional article according to claim 2,

the functional layer is formed on at least one of the front side and the rear side in the longitudinal direction of the absorbent article with respect to the region where the absorber is provided.

4. The functional article according to claim 3,

the adhesive layer is formed at a position that does not overlap with at least a central portion of the functional layer in the width direction of the absorbent article in the thickness direction of the absorbent article.

5. The functional article according to claim 3,

the adhesive layer is not present at both end portions of the functional layer in the width direction of the absorbent article and at positions outside of both end portions in a plan view.

6. The functional article according to any one of claims 2 to 5,

the functional layer is formed at a position not overlapping with the adhesive layer in the thickness direction.

7. The functional article according to any one of claims 2 to 5,

the functional layer is a liquid-retaining and liquid-permeable sheet member having a sheet shape,

the sheet member is located between the liquid-permeable sheet and the liquid-impermeable sheet.

8. The functional article according to claim 1,

the functional article is a functional sheet,

the base material includes a liquid-retaining and liquid-permeable skin contact sheet and a liquid-impermeable non-skin contact sheet on the skin contact surface side,

the adhesive layer is positioned on a surface of the non-skin contact surface side of the non-skin contact sheet or a surface of the skin contact surface side of the skin contact sheet,

the functional layer is positioned closer to the skin contact surface side than the non-skin contact piece,

at least a part of the adhesive layer is formed at a position not overlapping with at least a part of the functional layer in a thickness direction of the functional sheet.

9. The functional article according to claim 8,

the adhesive layer is formed at a position that does not overlap with at least a central portion of the functional layer in the in-plane direction of the functional sheet in the thickness direction of the functional sheet.

10. The functional article according to claim 8,

the adhesive layer is not present at both ends of the functional layer in the width direction of the functional sheet and at positions outside of both ends in a plan view.

11. The functional article according to any one of claims 8 to 10,

the functional layer is formed at a position not overlapping with the adhesive layer in the thickness direction.

12. The functional article according to any one of claims 8 to 10,

the skin-abutting sheet comprises the functional layer,

the adhesive layer is located on a surface of the non-skin contact surface side of the non-skin contact sheet.

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