WO2022118641A1

WO2022118641A1 - Absorbent article

Info

Publication number: WO2022118641A1
Application number: PCT/JP2021/041892
Authority: WO
Inventors: 傑田中; 貴仁永井
Original assignee: ユニ・チャーム株式会社
Priority date: 2020-12-01
Filing date: 2021-11-15
Publication date: 2022-06-09
Also published as: CN116507304A; JP2022087749A

Abstract

An absorbent article (1) that comprises an absorbent main body (10) and a waistline member (20) joined to the non-skin side of the absorbent main body (10), wherein a cooling agent placement area (70) equipped with a cooling agent and a no cooling agent placement area (75) equipped with no cooling agent are formed at least in parts of the waistline member (20). This absorbent article (1) is provided with a main body joint part (60) in which an adhesive is disposed for joining the absorbent main body (10) and the waistline member (20) together. When the absorbent article (1) in an unfolded state is viewed in the thickness direction, the main body joint part (60) at least partially overlaps with the no cooling agent placement area (75).

Description

Absorbent article

The present invention relates to an absorbent article.

Conventionally, in absorbent articles such as pants-type disposable diapers equipped with a waistline member and an absorbent body, the technique of arranging functional materials such as cooling agents and fragrances on the waistline member in order to give a refreshing feeling to the wearer is known. Has been done. For example, Patent Document 1 describes a pants-type absorbent article containing a fragrance that emits an aroma component into the atmosphere under atmospheric pressure in the waist region of the ventral side A and the dorsal side C (corresponding to a waistline member). It has been disclosed.

Japanese Unexamined Patent Publication No. 2018-102612

In the pants-type absorbent article of Patent Document 1, the fragrance is arranged so as to overlap a part of the joint portion where the waistline member and the absorbent main body are joined in the thickness direction. In this case, the adhesive forming the joint portion and the oil content of the fragrance may be mixed, and the joint strength at the joint portion may decrease. Further, in the region where the waistline member and the absorbent body are joined, the rigidity of the absorbent body tends to hinder the elasticity of the waistline member, which makes it difficult for the waistline member to adhere to the wearer's body, and functions such as fragrance. There was a risk that the material would be less likely to act on the wearer's skin.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to cool the wearer's skin easily without lowering the joint strength between the waistline member and the absorbent body. The purpose is to provide an absorbent article with a sensitizer.

The main invention for achieving the above object is to have a liquid-absorbing absorbent body and a waistline member joined to the non-skin side of the absorbent body, and at least a part of the waistline member feels cold. An absorbent article having a cooling sensation agent-arranged region provided with an agent and a cooling sensation non-arranged region not provided with a cooling sensitizer, wherein the absorbent main body and the waist circumference member are joined to each other. It has a main body joint on which an adhesive is placed, and when the absorbent article is unfolded and viewed in the thickness direction, the main body joint and the cooling sensation non-placed region overlap at least in part. It is an absorbent article characterized by being.
Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article provided with a cooling sensation agent that easily acts on the wearer's skin without lowering the joint strength between the waistline member and the absorbent main body.

It is a schematic perspective view of the diaper 1. It is a top view of the diaper 1 in the expanded and extended state. FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. It is a top view which shows an example of the cooling sensation agent arrangement region 70 in the expanded and extended state diaper 1. It is a figure explaining the positional relationship between the wearer's body and the cooling sensation agent arrangement area 70 at the time of wearing a diaper 1. It is schematic cross-sectional view which shows the modification of the waist circumference member 20 of a diaper 1. It is a top view which shows the modification of the cooling agent arrangement area 70.

The description of this specification and the accompanying drawings will clarify at least the following matters.
A cooling sensation agent placement region having a liquid-absorbing absorbent body and a waistline member joined to the non-skin side of the absorbent body, and a cooling sensation agent provided at least a part of the waistline member. It is an absorbent article provided with a cooling sensation non-arrangement region to which the cooling sensation agent is not provided, and has a main body joint portion in which an adhesive for joining the absorbent main body and the waist circumference member is arranged. However, when the absorbent article is unfolded and viewed in the thickness direction, the main body joint portion and the cooling sensation non-arranged region overlap at least in a part thereof. Goods.

According to such an absorbent article, the adhesive forming the main body joint portion and the cooling sensation agent are less likely to be mixed, so that the joint strength between the absorbent main body and the waistline member is less likely to decrease. Further, since the cooling sensation agent placement region of the waistline member is not easily affected by the rigidity of the absorbent body, the cooling sensation agent placement region tends to fit the wearer's skin when the absorbent article is worn. As a result, it is possible to realize an absorbent article having a cooling sensation agent that easily acts on the wearer's skin without lowering the joint strength between the waistline member and the absorbent main body.

In such an absorbent article, the waist member and the absorbent body overlap with each other more than the total weight of the cooling sensation provided in the area where the waist member and the absorbent body overlap. It is desirable that the total weight of the cooling sensitizers provided in the non-existent area is larger.

According to such an absorbent article, when the cooling sensation agent is provided in the region of the waist circumference member that overlaps with the absorbing body, the absorbing body is formed between the wearer's skin and the cooling sensation agent. The intervention may make it difficult for the cooling sensation agent to reach the wearer's skin, making it difficult for the cooling sensation effect to occur. On the other hand, by increasing the amount of the cooling sensation agent provided in the area not overlapping with the absorbent main body more than the cooling sensation agent provided in the area overlapping with the absorbent main body, the cooling sensation effect can be obtained by the absorbent main body. It is possible to suppress the inhibition and make the wearer more likely to feel the cooling sensation effect.

It is desirable that the entire body joint portion of the absorbent article overlaps with the cooling sensitizer non-arranged region when viewed in the thickness direction.

According to such an absorbent article, the possibility that the adhesive forming the main body joint portion and the cooling sensation agent are mixed is lower, and it is possible to prevent the joint strength between the absorbent main body and the waistline member from being lowered. It's easy to do. Further, since it does not overlap with the highly rigid absorbent body, the cooling sensation agent placement area can be more easily fitted to the wearer's skin, and the wearer can easily feel the cooling sensation effect.

In such an absorbent article, the waist circumference member has a front waist circumference portion and a rear waist circumference portion, and the rear waist circumference is larger than the total weight of the cooling sensation agents provided in the front waist circumference portion. It is desirable that the total weight of the cooling sensitizers provided in the portion is larger.

According to such an absorbent article, by arranging a large amount of cooling agent on the posterior side (dorsal side) as compared with the anterior side (ventral side), a greater cooling sensation is given to the wearer on the dorsal side where sweat is likely to occur. You can feel the effect. Therefore, a good refreshing feeling can be given on the back side of the wearer.

In the absorbent article, the cooling sensation agent placement region is arranged at a portion of the dorsal side of the wearer that abuts on the region from the posterior superior iliac spine to the iliac ridge when the absorbent article is worn. It is desirable that it is done.

According to such an absorbent article, in the area concerned, the bulging iliac ridge makes it easier for the waistline member (cooling sensation agent placement area) to adhere to the wearer's skin, and the wearer has a cooling sensation effect due to the cooling sensation agent. Can be made easy to feel. In particular, when the wearer is sitting or sleeping, it becomes easier to sweat in the area, so that the comfort of the cooling sensation can be further enhanced.

Such an absorbent article having a vertical direction and a horizontal direction intersecting each other.
It is desirable that the cooling sensation agent placement region is provided between the upper end of the rear waist circumference member and the rear upper end of the absorbent body in the vertical direction.

According to such an absorbent article, by providing a cooling sensation agent placement region near the upper end portion of the rear waist circumference portion where a large amount of sweat is generated and sweat is likely to accumulate and stuffiness is likely to occur at the time of wearing, the wearer can use the region. It makes it easier to feel a refreshing feeling and can reduce the discomfort caused by sweat stuffiness.

It is desirable that the absorbent article has a vertical direction and a horizontal direction intersecting each other, and the cooling sensation agent placement region has a discontinuous portion in the central portion in the horizontal direction.

According to such an absorbent article, in the left-right direction, as compared with the case where the cooling sensitizer placement region is continuously provided, the central portion abutting the depression between the left and right iliac ridges is discontinuous. Even if the part is provided, it is unlikely that there will be a difference in the refreshing feeling given to the wearer. Therefore, by not providing a cooling sensation agent in the central portion, it is possible to reduce the cost of arranging the cooling sensation agent while maintaining a good cooling sensation effect.

It is desirable that the cooling sensation agent placement region of the absorbent article has a discontinuous portion straddling the central position of the absorbent article in the left-right direction.

According to such an absorbent article, the central position in the left-right direction is the part where the gap between the body and the posterior waist circumference is the largest between the iliac ridges and it is difficult to contribute to the refreshing feeling given to the wearer. Therefore, by providing the cooling sensation agent placement region discontinuous portion so as to straddle the central position, it is possible to efficiently form the cooling sensation agent placement region without reducing the cooling sensation effect while suppressing the cost. .. Further, since the cooling sensitizer is not arranged in the region where the gap becomes large, air easily passes through in the vertical direction, and stuffiness is less likely to occur when the absorbent article is worn.

Such an absorbent article has a vertical direction and a horizontal direction intersecting each other, and has side joint portions for joining the front side waist circumference portion and the rear side waist circumference portion at both ends in the left and right direction. In the left-right direction, it is desirable that the cooling sensitizer placement region is arranged at a predetermined distance from the side joint portion.

According to such an absorbent article, since the cooling sensation agent is provided so as not to overlap with the side joint portion, the joint strength of the side joint portion is lowered due to the influence of the oil contained in the cooling sensitizer. Is suppressed. This makes it difficult for the front waistline portion and the rear waistline portion to come off.

The absorbent article has a vertical direction and a horizontal direction that intersect with each other, and in the vertical direction, the cooling sensation agent placement region is arranged at a distance from the upper end of the waist circumference member by a predetermined distance. Is desirable.

According to such an absorbent article, the upper end edge of the waistline member is likely to come into contact with the wearer's clothing when the absorbent article is worn, so a cooling sensation agent is provided so as not to overlap with the upper end edge. By doing so, it is possible to prevent the cooling sensation agent from adhering to the wearer's clothes.

The absorbent article has a vertical direction and a horizontal direction that intersect with each other, and the cooling sensation agent placement region is a first cooling sensation agent placement region and the vertical direction of the first cooling sensation agent placement region. It is desirable to have a second cooling sensitizer disposition region that is separated from the lower side.

According to such an absorbent article, even if the waistline member is sagging when the wearer moves his / her body during wearing, at least one of the upper and lower cooling sensitizer placement regions is the wearer. It is more likely that it is in close contact with your skin. Therefore, it is possible to make the wearer more likely to feel the cooling sensation effect.

In such an absorbent article, it is desirable that the width of the first cooling sensation agent placement region in the vertical direction is equal to or larger than the width of the second cooling sensation agent placement region in the vertical direction.

According to such an absorbent article, it is possible to increase the probability that the first cooling sensation agent placement region adheres to the wearer's skin in the region above the waistline where sweat is likely to occur. Therefore, it is possible to improve the cooling sensation effect in a region where sweat tends to accumulate when the absorbent article is worn.

In the absorbent article, in the vertical direction, between the first cooling sensation agent placement region and the second cooling sensation agent placement region, the skin-side sheet and the non-skin-side sheet of the rear waist circumference member It is desirable that a joint portion is provided to join the parts in the thickness direction.

According to such an absorbent article, the skin-side sheet and the non-skin-side sheet are bonded to each other in the region between the first cooling sensation agent placement region and the second cooling sensation agent placement region. When the absorbent article is worn, the area is less likely to rise from the wearer's skin. As a result, the first cooling sensation agent placement area and the second cooling sensation agent placement area provided above and below the area are likely to be in close contact with the wearer's skin, making it easier for the wearer to feel the cooling sensation effect. be able to.

The absorbent article has a vertical direction and a horizontal direction intersecting each other, and the waist circumference member has a waist circumference elastic member that expands and contracts in the left and right direction, and among the waist circumference members, the said in the vertical direction. The region overlapping with the cooling agent placement region was designated as the first region, and the region adjacent to the lower side of the first region and not overlapping with the cooling agent placement region in the vertical direction was designated as the second region. When, it is desirable that the lateral stress of the girth elastic member in the first region is larger than the lateral stress of the girth elastic member in the second region.

According to such an absorbent article, by increasing the stress of the waist circumference elastic member in the first region overlapping with the cooling sensation agent placement region, the rear waist circumference portion (cooling sensation agent placement region) is worn in the first region. It becomes easier to adhere to the skin of the person, and the wearer can feel the cooling effect more easily.

It is desirable that the absorbent article has a portion where the cooling sensation agent placement region and the waistline elastic member overlap when viewed in the thickness direction.

According to such an absorbent article, the contraction force due to the elastic member around the waist tends to act directly on the cooling sensation agent placement region. As a result, when the absorbent article is worn, the cooling sensation agent placement region is pressed against the wearer's skin, and the cooling sensation effect can be improved.

It is desirable that the absorbent article does not have a portion where the cooling sensation agent placement region and the waistline elastic member overlap when viewed in the thickness direction.

According to such an absorbent article, the oil content of the cooling sensation agent provided in the cooling sensation agent placement region and the adhesive adhering to the elastic member around the waist are mixed to reduce the bonding force. Can be suppressed. This makes it easier to suppress misalignment of the elastic member around the waist.

In the absorbent article, the waistline member has a skin side sheet, a non-skin side sheet, and a skin surface sheet laminated on the skin side of the skin side sheet, and the cooling sensation agent is a cooling sensation agent. It is desirable that the skin side sheet is provided between the skin side sheet and the skin surface sheet.

According to such an absorbent article, it is possible to prevent the cooling sensation agent from coming into direct contact with the wearer's skin while providing the cooling sensation agent at a position close to the wearer's skin. As a result, it is possible to make the wearer feel a sufficient cooling sensation effect while suppressing skin troubles.

It is desirable that the sheet member of the absorbent article adjacent to the skin side and the non-skin side of the cooling sensation agent placement region is a non-woven fabric containing a melt blown layer, respectively.

According to such an absorbent article, the non-woven fabric containing the melt blown layer is composed of ultrafine fibers, so that the fiber density is high, whereby the cooling agent permeates the waistline member from the inside to the outside in the thickness direction. Can be prevented from falling off.

The absorbent article has a vertical direction and a left-right direction intersecting each other, and the girth member has a front girth portion and a rear girth portion, and the front girth portion is provided at both ends in the left-right direction. It is desirable to have a side joint portion for joining the portion and the posterior waist circumference portion, and to provide the cooling sensation agent placement region below the lower end of the side joint portion in the vertical direction. ..

According to such an absorbent article, the cooling sensation effect is felt even when the wearer of the absorbent article moves or sits by providing the cooling sensation agent placement area below the waistline member. It can be made easier.

Such an absorbent article has a rear leg circumference elastic member along the lower end edge portion of the rear side waist circumference portion, and when viewed in the thickness direction, the rear side leg circumference elastic member and the cooling It is desirable that the region overlaps with the sensitive agent placement region.

According to such an absorbent article, even if the wearer walks or moves the leg while wearing the absorbent article, the lower end edge (buttock cover) of the rear waist circumference portion is difficult to be rolled up, and the legs are not easily rolled up. The cooling effect can be enhanced along the peripheral opening. This makes it possible to give the wearer a better refreshing feeling.

In such an absorbent article, the waistline member has a portion where irregularities are formed in the thickness direction when the absorbent article is worn or in a natural state, and when viewed in the thickness direction, It is desirable to have a portion where the unevenness is formed and the cooling sensation agent placement region overlaps.

According to such an absorbent article, a portion where the waist member easily hits and a portion where the waist circumference member does not easily hit the wearer's body are formed by the unevenness, so that a portion where the cooling sensation agent easily acts and a portion where the cooling sensation agent does not easily act are formed. It is possible to develop a cooling sensation function for a long period of time. Therefore, it is possible to easily maintain the comfort when wearing the absorbent article.

=== Embodiment ===
As the type-absorbent article according to the present invention, a pants-type disposable diaper (hereinafter, also referred to as “diaper 1”) will be described as an example. However, the absorbent article according to the present invention shall also include shorts type napkins and other pants (shorts) type absorbent articles.

<Composition of diaper 1>
FIG. 1 is a schematic perspective view of the diaper 1. FIG. 2 is a plan view of the unfolded and stretched diaper 1. FIG. 3 is a schematic cross-sectional view taken along the line AA of FIG. The "stretched state" of the diaper 1 is a state in which the entire diaper 1 (the entire product) is stretched without wrinkles. It refers to a state in which the dimensions of the waist member (20, etc.) are extended until they match or are close to the dimensions of the individual member.

In the pants-shaped state shown in FIG. 1, the diaper 1 has a vertical direction, a horizontal direction, and a front-rear direction that intersect each other, and has a waist circumference opening BH and a pair of leg circumference openings LH and LH.
The upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the inseam side. In addition, the front side in the anteroposterior direction corresponds to the ventral side of the wearer, and the rear side corresponds to the dorsal side of the wearer. Further, in the unfolded state of FIG. 2, the diaper 1 has a vertical direction and a horizontal direction that intersect each other. The vertical direction is a direction along the vertical direction in FIG. 1, and corresponds to the longitudinal direction of the absorbent body 10. The lateral direction is a direction along the left-right direction in FIG. Further, as shown in FIG. 3, the direction in which the materials constituting the diaper 1 are laminated is defined as the thickness direction. The side in contact with the wearer's skin in the thickness direction is the skin side, and the opposite side is the non-skin side.

The diaper 1 has a liquid-absorbing absorbent body 10 and a waistline member 20 arranged on the non-skin side of the absorbent body 10. The girth member 20 has a front girth portion 30 corresponding to the front body of the diaper 1 and a posterior girth portion 40 corresponding to the back body of the diaper 1. That is, the diaper 1 of the present embodiment has an absorbent main body 10 which is applied to the crotch portion of the wearer and absorbs excrement such as urine as the first part, and the ventral side of the wearer as the second part. It is a so-called three-piece type diaper having a front waist circumference portion 30 covering the portion and a rear waist circumference portion 40 covering the back side portion of the wearer as a third component.

In the unfolded state of FIG. 2, the anterior girth portion 30 and the rear girth portion 40 are arranged in parallel with a vertical distance from each other, and the absorbent main body 10 is hung between them. Then, the end portions 10ea and 10eb in the longitudinal direction of the absorbent main body 10 (corresponding to the vertical direction in FIG. 2) are joined and fixed to the skin side of the nearest

waist circumference portions

30 and 40 via the main body joint portion 60, respectively. There is.
Specifically, in the front overlapping region OL30 where the absorbent main body 10 and the front waist circumference portion 30 overlap in the thickness direction, the front main body joining portion 61 (main body joining) formed by an adhesive such as a hot melt adhesive. The non-skin side surface of the absorbent body 10 and the skin side surface of the front waist circumference portion 30 are joined by the portion 60) (see FIGS. 2 and 3). Similarly, in the rear overlapping region OL40 where the absorbent main body 10 and the rear waist circumference portion 40 overlap in the thickness direction, the rear main body joint portion 62 (main body) formed by an adhesive such as a hot melt adhesive. The non-skin side surface of the absorbent body 10 and the skin side surface of the rear waist circumference portion 40 are joined by the joint portion 60).

Then, from this unfolded state, the absorbent main body 10 is folded in half with the center position CL in the vertical direction as the folding position (bi-fold line). In this folded state, the front waist circumference portion 30 and the rear side waist circumference portion 40 facing each other are joined and connected to each other at the side portions 30sw and the side portions 40sw on both sides in the left-right direction, and the pair of side

joint portions

50 and 50 are formed. It is formed. That is, the front side waist circumference portion 30 and the rear side waist circumference portion 40 are formed in an annular shape by the pair of side

joint portions

50, 50. The side bonding portion 50 is formed by a known bonding means such as welding or adhesion.
As a result, the diaper 1 is in a pants-type state in which the waist opening BH and the pair of leg openings LH and LH are formed as shown in FIG.

(Absorbable body 10)
The absorbent body 10 has an absorbent core 11 that absorbs excrement, a top sheet 12 that is arranged on the skin side in the thickness direction of the absorbent core 11, and a non-skin side of the absorbent core 11. It also has a back sheet 13 (see FIG. 3). However, the absorbent main body 10 may include a seat member other than this. For example, a second sheet (not shown) may be provided between the top sheet 12 and the absorbent core 11 in the thickness direction.

The absorbent core 11 is a member that absorbs and retains excrement such as urine, and is formed of, for example, a liquid absorbent fiber such as a pulp fiber mixed with a highly absorbent polymer (SAP). The outer peripheral surface of the absorbent core 11 may be covered with a liquid-permeable sheet member (core wrap sheet 11b) such as tissue paper or non-woven fabric. The absorbent core 11 of the present embodiment has a constricted portion 11c having a narrowed width in the left-right direction between the front end and the rear end in the longitudinal direction, and has a plan view as shown in FIG. It has an approximately hourglass shape. The constricted portion 11c is a portion sandwiched between both legs of the wearer when the diaper 1 is worn, and the length of the portion in the left-right direction is short (narrow width), so that the absorbent core 11 Makes it easier to fit in the wearer's crotch.

The top sheet 12 is a liquid permeable sheet, and for example, a hydrophilic air-through non-woven fabric, a spunbonded non-woven fabric, or the like is used. The top sheet 12 may be configured so that both sides in the left-right direction are folded back from the skin side in the thickness direction to the non-skin side to wrap the absorbent core 11 (not shown in FIG. 3).

The back sheet 13 has a two-layer structure of a liquid-impermeable sheet 13a and a hydrophobic exterior sheet 13b arranged on the non-skin side thereof. As the liquid impermeable sheet 13a, for example, a resin film or the like is used, and as the exterior sheet 13b, for example, a flexible non-woven fabric is used.

Further, a pair of leak-proof wall portions (not shown in FIG. 3) may be provided along the vertical direction (longitudinal direction of the absorbent main body 10) on both left and right sides of the absorbent main body 10. For example, in the left-right direction (horizontal direction), a part of the exterior sheet 13b may extend outward from both ends of the absorbent core 11 and be bent toward the skin to form a pair of leak-proof wall portions. can. By providing such a leak-proof wall portion, it becomes easy to prevent the excrement absorbed by the absorbent main body 10 from leaking sideways when the diaper 1 is worn.

(Front waist circumference 30)
As shown in FIG. 3, the front waist circumference portion 30 is a non-skin side sheet 31 arranged on the skin side in the thickness direction and a non-skin side sheet laminated so as to be adjacent to the non-skin side of the skin side sheet 31. It has a waist-side elastic member 35 provided between the skin-side sheet 31 and the non-skin-side sheet 32 in the thickness direction.

The skin-side sheet 31 and the non-skin-side sheet 32 are rectangular sheet members in a plan view as shown in FIG. 2, and are formed of, for example, SMS (spun bond-melt blown-spun bond) non-woven fabric.

The waistline elastic member 35 is formed of, for example, thread rubber or the like, and is arranged between the skin-side sheet 31 and the non-skin-side sheet 32 side by side in the vertical direction, and is attached in a state of being extended in the left-right direction. ing. Due to the elasticity developed by the waistline elastic member 35, the front waistline portion 30 fits the wearer's ventral waistline.

The waistline elastic member 35 can be attached using an adhesive such as a hot melt adhesive. For example, the waistline elastic member 35 can be attached by applying a hot melt adhesive to the waistline elastic member 35, stretching it at a predetermined elongation ratio, and sandwiching it between the skin side sheet 31 and the non-skin side sheet 32. That is, the skin-side sheet 31 and the non-skin-side sheet 32 are joined by an adhesive via the waistline elastic member 35. The waistline elastic member 35 may be attached by applying the adhesive to the skin side sheet 31 and the non-skin side sheet 32 side instead of applying the adhesive to the waistline elastic member 35 side.

Further, the skin surface sheet 36 is laminated on a part of the surface on the most skin side of the front waist circumference portion 30. As shown in FIG. 3, the skin surface sheet 36 is a sheet member arranged so as to cover (straddle in the vertical direction) the upper end 10ea (front end in the vertical direction) on the ventral side of the absorbent body 10 from the skin side. Yes, it has a function as a cover sheet. This prevents the upper end edge of the absorbent body 10 from biting into the wearer's skin when the diaper 1 is worn. The skin surface sheet 36 is formed of, for example, an SMS non-woven fabric or the like. Further, the skin surface sheet 36 may be a sheet member having elasticity in the left-right direction (for example, an elastic non-woven fabric).

(Rear waist circumference 40)
The rear waist circumference portion 40 has substantially the same configuration as the front waist circumference portion 30. That is, the rear waist circumference portion 40 includes a skin side sheet 41 arranged on the skin side in the thickness direction, a non-skin side sheet 42 laminated so as to be adjacent to the non-skin side of the skin side sheet 41, and a skin side. It has a plurality of waistline elastic members 45 provided between the sheet 41 and the non-skin side sheet 42 in the thickness direction. Since the configuration of each member is almost the same as that of the front waist circumference portion 30, the description thereof will be omitted.

On the other hand, the external shape of the rear waist circumference portion 40 is different from that of the front waist circumference portion 30. Specifically, as shown in FIG. 2, the rear waist circumference portion 40 has a buttock cover 40b having a substantially trapezoidal shape on the lower side in the vertical direction with respect to the side joint portion 50 (side portion 40sw). The buttock cover 40b is a portion where the width in the left-right direction is narrowed from the upper side in the vertical direction to the lower side, and the outer edge thereof is curved. By providing the buttock cover 40b, it is possible for the rear waist circumference portion 40 to widely cover the buttock portion of the wearer when the diaper 1 is worn.

The buttock cover 40b is provided with a hind leg elastic member 47 such as a rubber thread as shown in FIG. The hind leg elastic member 47 is attached between the skin side sheet 41 and the non-skin side sheet 42 in a state of being extended along the peripheral edge portion of the buttocks cover 40b, and the hind leg elastic member 47 is expressed. Due to the elasticity, when the diaper 1 is worn, the buttocks cover 40b of the rear waist circumference portion 40 is easily fitted to the wearer's buttocks, and it is difficult to be rolled up from the buttocks.

Further, similarly to the front waist circumference portion 30, the skin surface sheet 46 is laminated on a part of the skinmost surface of the rear waist circumference portion 40. As shown in FIG. 3, the skin surface sheet 46 is a sheet member arranged so as to cover (straddle in the vertical direction) the upper end 10 eb (rear end in the vertical direction) on the back side of the absorbent body 10 from the skin side. Is. Further, the rear waist circumference portion 40 of the diaper 1 has a cooling sensation agent arrangement region 70 in which a cooling sensation agent is provided between the skin surface sheet 46 and the skin side sheet 41 in the thickness direction.

<Cooling sensitizer placement area 70>
FIG. 4 is a plan view showing an example of a cooling sensation agent placement region 70 in the unfolded and stretched diaper 1. As shown in FIG. 4, the diaper 1 of the present embodiment has a cooling sensation agent placement region 70 in which a cooling sensation agent is provided in a part of the region of the rear waist circumference portion 40 of the waist circumference member 20. .. The cooling sensation agent is arranged in a shape such as a planar shape, a linear shape, a spiral shape, a Z shape, a linear shape, a dot shape, or the like.

As the cooling sensation agent used in the present embodiment, those generally known as cooling sensitizers in the art can be used, but they are volatile and activate receptors in nerves of the skin. Those that act on the channel (TRPM8) are preferred. For example, menthol (eg, l-menthol) and its derivatives (eg, menthyl lactate), methyl salicylate, camphor, cucumber extract, essential oils derived from plants (eg, mint, eucalyptus, nutmeg) and the like can be mentioned. Further, the cooling sensation agent placement region 70 may be formed by applying the water-disintegrating microcapsules containing these cooling sensitizers to a predetermined region. Details of the microcapsules will be described later.

In the example of FIG. 4, a pair of cooling sensation

agent placement regions

70, 70 are located in the upper region of the rear waist circumference portion 40 in the vertical direction, that is, at a position closer to the upper end 40 eu than the lower end 40 ed of the rear waist circumference portion 40 in the vertical direction. Is provided. The pair of cooling sensation

agent placement areas

70, 70 are arranged apart from each other by a predetermined distance gw70 in the left-right direction. The pair of cooling sensation

agent placement regions

70 and 70 are located below the first cooling sensation agent placement region 71 and the first cooling sensation agent placement region 71, which extend in a strip shape in the left-right direction (horizontal direction), respectively. It has a second cooling sensation agent arrangement region 72 provided. The first cooling sensation agent placement region 71 and the second cooling sensation agent placement region 72 are arranged apart from each other by a predetermined distance gl70 in the vertical direction.

Further, in the waist circumference member 20 (rear side waist circumference portion 40), the region where the cooling sensation agent (microcapsule) is not provided is defined as the cooling sensation agent non-arrangement region 75. For example, in FIG. 4, the region between the pair of cooling sensation

agent placement regions

70 and 70 in the left-right direction (the region represented by gw70) is the cooling sensation agent non-placement region 75. Similarly, the region between the first cooling sensation agent placement region 71 and the second cooling sensation agent placement region 72 in the vertical direction (the region represented by gl70) is also the cooling sensation agent non-placement region 75.

When the diaper 1 is distributed to the market, it is shipped in a folded state, but when the product is transported or the diaper 1 purchased by the user is opened, the cooling sensation agent (microcapsule) is cooled. It may separate from the sensitizer placement region 70 and adhere to another region of the diaper 1 (cooling sensitizer non-placement region 75). Further, when the diaper 1 is worn, the cooling sensation agent (microcapsules) may be similarly separated from the cooling sensation agent placement region 70 by the wearer moving the body or rubbing the non-woven fabrics with each other. .. That is, even in the cooling agent non-arranged region 75, there is a possibility that the cooling agent (microcapsules) is contained with a probability of substantially less than 1%. However, in the present embodiment, the region to which the cooling sensation agent (microcapsules) that have been unintentionally dropped is not included in the cooling sensation agent arrangement region 70. That is, a region where the concentration of the cooling sensation agent (microcapsules) is clearly lower than that of the cooling sensation agent arrangement region 70, or a region where the concentration of the cooling sensation agent is below a certain value is also defined as the cooling sensation agent non-arrangement region 75. ..

By the way, when the cooling sensation agent is colorless and transparent, it is difficult to visually recognize the cooling sensation agent arranging region 70. However, for example, the position of the cooling sensation agent arranging region 70 is confirmed by performing the following sensory test. be able to. First, the unfolded waistline member 20 is divided into sections (for example, 20 equal parts in the vertical direction and 10 equal parts in the horizontal direction) and cut out, and the divided and cut out members are further divided into predetermined sizes (for example, 2 × 2 cm). ) To cut out multiple sheets. Then, the cut out members are peeled off one by one with, for example, a cold spray to produce a plurality of sample sheets (patches). Next, a PE sheet (polyethylene sheet, which is an example and may be a highly airtight sheet) having the same size as the sample sheet is prepared for each sample sheet. Next, the PE sheet is placed on the first sample sheet, and the first sample sheet is placed inside the upper arm of the inspector in the sensory test, and the time until the inspector feels a cooling sensation effect from the sample sheet is allowed. Measure and record. Such a sensory test is performed on a plurality of sample sheets, and the time is measured and recorded for each. Such sensory tests are performed in all compartments and the time for all sample sheets is measured and recorded. Then, by comparing the time of each sample sheet, it is possible to identify the sample sheet to which the cooling sensation agent has been applied.

Further, for specifying the cooling sensation agent placement region 70, for example, a headspace solid-phase microextraction method can be used. Specifically, a gas chromatograph-mass spectrometer (for example, GCMS-QP2010 Plus manufactured by Shimadzu Corporation) is used, helium is used as the carrier gas, and the measurement mode is the scanning method, and the measurement is performed by the electron shock ionization method. In such a method, each sample sheet is placed in a beaker in a folded state and rolled into small pieces. The top of the beaker is covered with aluminum foil, and the top of the beaker is covered with a plastic paraffin film. SPME fiber (Sigma-Aldrich 50/39 μm DVB / CAR / PDMS, Tableflex 2 cm) is inserted into a beaker through the aluminum foil to extract the aroma component of each sample sheet. The SPME fiber removed from the beaker is then immediately measured with a gas chromatograph-mass spectrometer. The value obtained by dividing each mass obtained by this by the area of the sample sheet is calculated. By comparing the divided values, it is possible to identify the sample sheet to which the cooling sensation agent was applied.

Further, when the cooling sensation agent is encapsulated in microcapsules and the microcapsules are formed from water-soluble starch, it is also possible to visualize the cooling sensation agent placement region 70 by coloring with iodine or the like. .. Further, the sensitive agent placement region 70 may be determined by observing the region where the microcapsules are arranged with an electron microscope or the like and measuring the number of microcapsules provided for each region.

<About microcapsules>
In the present specification, the water-disintegrating microcapsule means a capsule having a diameter of 1 to 1,000 μm and having a space containing a core material (cooling sensation component). The appearance shape of the capsule is not particularly limited as long as it contains the core material and can control the release of the core material, and examples thereof include an appearance shape such as a spherical shape and an amorphous shape. Further, the capsule is a mononuclear type having one space for holding the core material, a multinucleated type having a plurality of spaces for holding the core material, a structure in which fine particle-like core substances are dispersed inside particles, or a liquid state. It can be a matrix type having a structure impregnated with the core material of. Examples of the shape of the space include a spherical shape, an irregular shape, and the like.

In microcapsules, the membrane material (wall material) that contains (or contains) the core material changes due to chemical stimuli, and the components that are contained (or contained) are released. Examples of the chemical stimulus include contact between a liquid (aqueous solution) such as a body fluid and a wall material of microcapsules.

By applying these chemical stimuli to the wall material of microcapsules, the wall material can collapse. As a result, the release of the core material in the microcapsules can be started, or if the core material is gradually released before the stimulation, the degree of the release can be accelerated. When the microcapsules are water-disintegrating as in the present invention, it means that the microcapsules disintegrate to the extent that the contained cooling sensation component is released when they come into contact with a liquid (body fluid) such as sweat. Specifically, when the wall material of microcapsules dissolves in water and disintegrates, when the microcapsules come into contact with a liquid, the microcapsules swell in water and their strength decreases, causing the microcapsules to be destroyed. For example, when it collapses.

In the absorbent article 1 of the present embodiment, when the microcapsules disintegrate due to dissolution in water, the microcapsules are preferably 10 to 300 g, more preferably 20 to 100 g with respect to 100 g of water at 25 ° C. It has a water solubility in the range of 200 g, and more preferably 30-100 g. The water solubility was set to OECD Guidelines No. 2 except that the test temperature was set to 25 ° C. Measured according to the 105 flask method.

Further, it is preferable that the microcapsules are insoluble in the solvent which is the dispersion medium of the microcapsules, and it is preferable that the microcapsules do not swell in the solvent which is the dispersion medium of the microcapsules. This is from the viewpoint of protecting the cooling sensation component contained therein. Materials for water-disintegrating microcapsules include, for example, saccharides such as monosaccharides (eg glucose), disaccharides (eg sucrose), polysaccharides (eg dextrin, glucomannan, sodium alginate, water-soluble starch). Etc.), cyclic oligosaccharides (cyclodextrin), gelatin, water-soluble polymers (eg, polyvinyl alcohol, polyvinyl acetate, etc.) and the like.

The above microcapsules are commercially available, and examples thereof include INCAP (trademark), which is commercially available from Symrise.

Further, the microcapsules are produced by dissolving the material of the microcapsules in water to form an aqueous solution, mixing the cooling sensation component and the surfactant with the aqueous solution, and drying under reduced pressure while spraying the aqueous solution. Can be done.

As the solvent which is the dispersion medium of the above-mentioned microcapsules, it is preferable that the cooling sensation component is kept contained in the microcapsules. For such a solvent, Japanese Patent Publication No. 2016-13154 can be referred to.

<Effect of cooling sensation agent placement area 70>
The diaper 1 of the present embodiment is provided with a cooling sensation agent arranging area 70 in which a cooling sensation agent is provided on the waist circumference member 20, so that when the diaper 1 is worn, a cooling sensation effect is produced on the wearer's skin. , You can feel a refreshing feeling. The cooling agent placement region 70 of the diaper 1 is a main body joint portion 60 (rear side main body joint) that joins the absorbent main body 10 and the waist circumference member 20 (rear side waist circumference portion 40) when viewed in the thickness direction. It is arranged so as not to overlap with the part 62) (see FIG. 4). In other words, when viewed in the thickness direction, the cooling sensitizer non-arranged region 75 to which the cooling sensitizer is not provided is configured to have a portion overlapping with the main body joint portion 60.

In conventional disposable diapers, when a so-called functional material such as a cooling sensation agent is provided on the waistline member, it is common to apply the cooling sensation agent (functional material) in as wide a range as possible from one side to the other side in the lateral direction. (See, for example, Patent Document 1). In this case, the main body joint of the waistline member and the cooling sensation agent (functional material) overlap, and the adhesive forming the main body joint and the oil contained in the cooling sensation agent (functional material) are mixed. This may reduce the joint strength of the main body joint. Further, in the portion of the waistline member that overlaps with the absorbent body, the elasticity of the waistline member is likely to be hindered due to the influence of the rigidity of the absorbent body, and the waistline member is difficult to adhere to the wearer's body. There was a risk that the sensory agent (functional material) would not easily act on the wearer's skin.

On the other hand, in the diaper 1 of the present embodiment, the main body joint portion 60 is formed by limiting the cooling sensation agent placement region 70 (and the cooling sensation agent non-placement region 75) to the positions described in FIG. It becomes difficult for the adhesive and the cooling sensation agent to mix with each other, and it is possible to make it difficult to reduce the bonding strength between the absorbent main body 10 and the waist circumference member 20. Further, since the cooling sensation agent placement region 70 of the waist circumference member 20 (rear side waist circumference portion 40) is not easily affected by the rigidity of the absorbent main body 10, the cooling sensation agent placement region 70 is worn by the wearer when the diaper 1 is worn. Easy to fit on your skin. As a result, it is possible to realize an absorbent article having a cooling sensation agent that easily acts on the wearer's skin without lowering the joint strength between the waistline member 20 and the absorbent main body 10.

In the diaper 1, the cooling sensation agent placement region 70 is arranged so as not to overlap with the entire main body joint portion 60 (rear side main body joint portion 62) when viewed in the thickness direction. In other words, the entire main body joint portion 60 (rear side main body joint portion 62) overlaps with the cooling agent non-arrangement region 75. Therefore, in the diaper 1, the possibility that the adhesive forming the main body joint portion 60 and the cooling sensation agent are mixed is extremely low, and it is easier to suppress the decrease in the joint strength between the absorbent main body 10 and the waist circumference member 20. .. Further, since the cooling sensation agent placement area 70 is less likely to be affected by the rigidity of the absorbent body 10, the cooling sensation agent placement area 70 (rear waist circumference 40) is more likely to fit the wearer's skin. It is possible to make the wearer feel the cooling effect easily.

Further, due to the above configuration, the waist member 20 and the absorbent body 10 absorb more than the total weight of the cooling sensation agents provided in the area where the waist member 20 and the absorbent main body 10 overlap (the overlapping areas OL30 and OL40 in FIG. 2). The total weight of the cooling sensation agents provided in the region where the sex body 10 does not overlap is larger. That is, the cooling sensation agent arrangement region 70 is formed so that the proportion of the cooling sensation agent provided at the position overlapping with the absorbent main body 10 among the cooling sensation agents provided in the waist circumference member 20 becomes small. .. When the cooling sensation agent is arranged in the overlapping areas OL30 and OL40 overlapping with the absorbent main body 10 in the waist circumference member 20, when the diaper 1 is worn, between the wearer's skin and the cooling sensation agent in the thickness direction. Since the absorbent main body 10 is interposed in the skin, it becomes difficult for the cooling sensation agent to come into contact with the wearer's skin, and it becomes difficult for the cooling sensation effect to act. Therefore, the larger the proportion of the cooling sensation agent provided in the overlapping regions OL30 and OL40, the smaller the cooling sensation effect of the diaper as a whole. On the other hand, in the diaper 1 of the present embodiment, the area that does not overlap with the absorbent body is larger than the amount of the cooling sensation agent provided in the area where the waist member 20 and the absorbent body 10 overlap. Since the amount of the cooling sensation agent provided in the above is larger, the cooling sensation effect is less likely to be hindered by the absorbent body, and the wearer can more easily feel the cooling sensation effect.

Further, in the diaper 1, the total weight of the cooling sensation agent provided on the rear side waist circumference portion 40 is larger than the total weight of the cooling sensation agent provided on the front side waist circumference portion 30 among the waist circumference members 20. Is getting bigger. The human body, which is the wearer of the diaper 1, usually has more sweat glands on the posterior (dorsal) waistline than on the anterior (ventral) waistline, and is more likely to sweat on the dorsal side.
Therefore, by arranging a large amount of cooling sensation agent on the dorsal side as compared with the ventral side, it is possible to make the wearer feel a greater cooling sensation effect on the dorsal side where sweat is likely to occur. In FIG. 4, the cooling sensation agent placement region 70 is provided in the posterior waist circumference portion 40, and is not provided in the front side waist circumference portion 30. Therefore, the diaper 1 tends to give a good refreshing feeling on the back side of the wearer.

FIG. 5 is a diagram illustrating the positional relationship between the wearer's body and the cooling sensation agent placement region 70 when the diaper 1 is worn. As shown in FIG. 5, the cooling sensation agent placement region 70 is arranged at a site on the dorsal side of the wearer that abuts on the region from the posterior superior iliac spine to the iliac ridge when the diaper 1 is worn. There is. In this portion, the protrusion of the iliac ridge makes it easier for the waistline member 20 to come into close contact with the wearer's skin, and makes it easier for the wearer to feel the cooling sensation effect of the cooling sensation agent provided in the cooling sensation agent placement region 70. Can be done. In addition, when the wearer is sitting or in a sleeping posture, the waistline member 20 is pressed against the skin at the site, and sweat is easily sweated. Therefore, by providing the cooling sensation agent placement region 70 at the position shown in FIG. 5, the comfort of the cooling sensation agent can be further enhanced.

The cooling agent arranging region 70 is provided between the upper end 10 eb on the rear side of the absorbent main body 10 and the upper end 40 eu of the rear waist circumference portion 40 in the vertical direction (vertical direction) (see FIG. 4).
When the diaper 1 is worn, in the area where the rear waist circumference portion 40 comes into contact with the wearer's body, the upper side in the vertical direction, that is, the closer to the waist circumference opening BH, the larger the amount of sweating and the easier it is for sweat to accumulate. It becomes easy to get stuffy. Therefore, by providing the cooling sensation agent placement region 70 in the region above the upper end 10eb on the rear side of the absorbent main body 10 (the upper end portion of the rear waist circumference portion 40), the wearer feels a cooling sensation effect in the region. It can be facilitated and the discomfort caused by sweat stuffiness can be reduced. Further, since the cooling sensation agent placement area 70 is provided above the rear upper end 10eb of the absorbent main body 10, when the diaper 1 is worn, the cooling sensation agent placement area 70 is between the wearer's skin ( Since the absorbent body 10 does not intervene in the thickness direction), the cooling sensation effect tends to act directly on the wearer's skin. Therefore, the comfort of the cooling sensation can be further improved.

Further, as described above, the cooling sensation agent placement regions 70 of the present embodiment are provided in pairs on the left and right with a predetermined distance gw 70 in the left-right direction. In other words, the cooling sensation agent arrangement region 70 has a discontinuous portion in the central portion in the left-right direction, and the central portion is a cooling sensation agent non-arrangement region 75 in which the cooling sensation agent is not provided. As shown in FIG. 5, in the region between the pair of cooling

sensitizer placement regions

70, 70, the waist circumference member 20 (posterior waist circumference portion 40) is attached to the wearer's body by a recess between the left and right iliac ridges. This is an area where it is difficult to adhere and contribute to the cooling sensation effect. That is, even if a discontinuous portion (cooling sensation non-arrangement region 75) is provided in the central portion, it is worn as compared with the case where the cooling sensation agent arrangement region 70 is continuously provided in the left-right direction. It is unlikely that there will be a difference in the refreshing feeling given to the person. Therefore, by not providing a cooling sensation agent in the central portion, it is possible to reduce the cost of arranging the cooling sensation agent while maintaining a good cooling sensation effect.

It is desirable that the discontinuous portion (cooling sensation non-arrangement region 75) in the left-right direction of the cooling sensation agent arrangement region 70 is arranged so as to straddle the central position in the left-right direction of the diaper 1. The depression between the iliac ridges (see FIG. 5) is usually deepest at the center position in the left-right direction. That is, the central position in the left-right direction is the part that is most difficult to contribute to the refreshing feeling given to the wearer. Therefore, by providing the cooling sensation agent placement region 70 discontinuous portion so as to straddle the central position in the left-right direction of the diaper 1, the cooling sensation agent placement region 70 can be efficiently performed without reducing the cooling sensation effect while suppressing the cost. Can be formed. In addition, since the cooling sensation agent is not placed in the region where the gap between the body and the posterior waist circumference 40 is the largest between the iliac ridges, air can easily pass through in the vertical direction, and it gets stuffy when wearing the diaper 1. Is less likely to occur.

Further, the cooling sensation agent placement region 70 is arranged at a predetermined distance from the side joint portion 50 in the left-right direction. That is, a predetermined distance is provided between the outer end of the cooling sensation agent arrangement region 70 and the side joint portion 50 in the left-right direction. As described above, in the side joint portion 50, the front waist circumference portion 30 and the rear waist circumference portion 40 are connected to each other by means of joining means such as welding and adhesion. When the cooling sensation agent placement region 70 is provided overlapping with the side joint portion 50, the cooling sensation is caused by the presence of the cooling sensation agent between the front waist circumference portion 30 and the rear waist circumference portion 40. The joint strength of the side joint portion 50 may decrease due to the influence of the oil contained in the agent. On the other hand, in the diaper 1 of the present embodiment, since the cooling sensation agent is provided so as not to overlap with the side joint portion 50, it is possible to prevent the cooling sensation agent from reducing the welding and adhesive strength. Will be done. As a result, the front waist circumference portion 30 and the rear waist circumference portion 40 are less likely to come off, and the diaper 1 can easily maintain the pants-shaped shape.

Further, the cooling sensation agent placement region 70 is provided so as to be separated from the upper end (40 eu) of the waist circumference member 20 by a predetermined distance in the vertical direction (see FIG. 4). That is, a predetermined distance is provided between the upper end of the cooling sensation agent arrangement region 70 and the upper end 40eu of the waist circumference member 20 in the vertical direction. The upper ends 30eu and 40eu of the waistline member 20 are portions that serve as the upper end edges of the diaper 1 and are portions that may come into contact with the wearer's clothing when the diaper 1 is worn. If a cooling sensation agent is provided on the upper end edge, the cooling sensation agent may adhere to clothes. On the other hand, in the diaper 1 of the present embodiment, the cooling sensation agent is provided so as not to overlap with the upper end edge of the waist circumference member 20, so that the cooling sensation agent adheres to the wearer's clothes when the diaper 1 is worn. It is possible to suppress the diaper.

Further, the cooling sensation agent arranging region 70 has a first cooling sensation agent arranging region 71 and a second cooling sensation agent arranging region 72 below the first cooling sensation agent arranging region 71 by a predetermined distance gl70. ing. If the wearer moves his / her body while wearing the diaper 1, the waistline member 20 may be sagging, which may make it difficult for the skin side surface of the waistline member 20 to fit the wearer's skin. That is, wrinkles may be formed on the waistline member 20 and a gap may be formed between the waist member 20 and the wearer's skin. Then, in the portion where such a gap is generated, it becomes difficult for the cooling sensation agent provided on the waist circumference member 20 to come into contact with the wearer's skin, and there is a possibility that the cooling sensation effect is less likely to occur. On the other hand, since the waist member 20 of the diaper 1 of the present embodiment has two cooling

sensitizer placement areas

71 and 72 that are vertically separated from each other, the waist member 20 may be sagging. Even so, there is a high possibility that at least one of the two upper and lower

cooling sensation areas

71 and 72 is in close contact with the wearer's skin. Therefore, even when the wearer of the diaper 1 moves his / her body, it is easy for the wearer to feel the cooling sensation effect firmly.

At this time, it is desirable that the width H71 in the vertical direction of the first cooling sensation agent placement region 71 is equal to or larger than the width H72 in the vertical direction of the second cooling sensation agent placement region 72. With such a configuration, when the diaper 1 is worn, the first cooling sensation agent placement region 71 is in close contact with the wearer's skin in the region above the waist circumference (the region close to the waist circumference opening BH) where it is easier to sweat. You can increase the probability. Therefore, it is possible to efficiently improve the cooling sensation effect in a region where sweat tends to accumulate when the diaper 1 is worn.

Further, in the diaper 1, at least one waistline elastic member 45 is provided in a region (region represented by gl70) between the first cooling sensation agent placement region 71 and the second cooling sensation agent placement region 72 in the vertical direction. It is provided (see FIG. 4). As described above, the waistline elastic member 45 is joined between the skin side sheet 41 and the non-skin side sheet 42 of the rear side waist circumference portion 40 by using an adhesive such as a hot melt adhesive. .. Therefore, in the region between the first cooling sensation agent arranging region 71 and the second cooling sensation agent arranging region 72 in the vertical direction, the skin side sheet 41 and the non-skin side sheet 42 are provided via the waist circumference elastic member 45. A joint portion for joining in the thickness direction is provided. Therefore, when the diaper 1 is worn, the region (region of gl70) between the first cooling sensation agent placement region 71 and the second cooling sensation agent placement region 72 is in close contact with each other in the thickness direction, and it is difficult for the diaper 1 to lift up from the wearer's skin. Become. Further, as shown in FIG. 4, if the waistline elastic member 45 is arranged in the region of gl70, the contraction force of the waistline elastic member 45 acts on the region and is pressed against the wearer's skin. Therefore, the first cooling sensation agent arranging area 71 and the second cooling sensation agent arranging area 72 provided above and below the gl70 region can easily adhere to the wearer's skin, and the wearer can feel the cooling sensation effect more. It can be made easier.

Further, in the waist circumference member 20 (rear side waist circumference portion 40) of the diaper 1, a region overlapping the cooling sensation agent placement region 70 in the vertical direction is adjacent to the lower side of the first region R1 and the first region R1. When the region that does not overlap with the cooling agent placement region 70 is defined as the second region R2 (see FIG. 4), the lateral stress of the waistline elastic member 45 in the first region R1 is the waistline elastic member in the second region. It is desirable that it is larger than the lateral stress of 45. The "stress" here is a force (that is, a contraction force) at which the elastic member tries to return from the extended state to the original state. For example, when the waistline elastic member 45 is arranged in the rear waistline portion 40 in the manufacturing process of the diaper 1, the waistline elastic member 45 may be arranged while changing the degree of extension by changing the transport speed of the waistline elastic member 45. The stress can be adjusted for each region by changing the number of arrangements. In this way, by increasing the stress of the waist circumference elastic member 45 in the first region R1 overlapping with the cooling sensation agent placement region 70, the first region R1 of the rear waist circumference portion 40 becomes easier to adhere to the wearer's skin. , The cooling effect can be made easier to feel.

The magnitude of the stress in the first region R1 and the second region R2 can be examined using a known tensile tester. For example, in each region, the rear waist circumference portion 40 is cut off by a predetermined length (for example, 50 mm) to collect a sample piece, and the sample piece is used in a pair of chuck portions of a tensile tester in the left-right direction (expansion / contraction direction). The sample pieces are gripped so that the distance between them is 10 mm, and in this state, the sample piece is pulled at a predetermined pulling speed until the distance between the gripped chuck portions becomes 15 mm. At this time, the force that the sample piece tries to return to its original state is measured. By making this measurement at several points and comparing them, the magnitude of stress can be investigated.

Further, in FIG. 4, when viewed in the thickness direction, the cooling sensation agent placement region 70 and the waistline elastic member 45 have an overlapping portion. With such a configuration, the contraction force of the waistline elastic member 45 tends to act directly on the cooling sensation agent placement region 70. That is, when the diaper 1 is worn, the cooling sensation agent placement region 70 is pressed against the wearer's skin, and the cooling sensation effect can be enhanced.

On the other hand, when viewed in the thickness direction, the cooling sensation agent placement region 70 and the waistline elastic member 45 may not have an overlapping portion. Since the waistline elastic member 45 is joined to the waistline member 20 by a hot melt adhesive or the like, if the cooling sensation agent placement region 70 and the waistline elastic member 45 overlap, the cooling sensation agent placement region 70 is provided. The oil content of the cooling sensation agent and the adhesive adhering to the waistline elastic member 45 may be mixed to reduce the bonding force. On the other hand, by arranging the waistline elastic member 45 so as not to overlap with the cooling sensation agent placement area 70, the joint strength between the waistline elastic member 45 and the waistline member 20 is less likely to decrease, and the position of the waistline elastic member 45 It is possible to suppress deviation and the like.

Further, in the diaper 1 of the present embodiment, as shown in FIG. 3, a feeling of coldness is felt between the skin side sheet 41 constituting the waist circumference member 20 (rear side waist circumference portion 40) and the skin surface sheet 46 in the thickness direction. The agent placement region 70 is provided. In other words, a sheet member such as a non-woven fabric is laminated on the skin side and the non-skin side of the cooling sensation agent arrangement region 70. Therefore, the cooling sensation agent (microcapsule) constituting the cooling sensation agent arrangement region 70 is difficult to come into direct contact with the wearer's skin, and it is easy to suppress the occurrence of skin troubles such as a rash. In the present embodiment, the number of sheet members laminated on the skin side of the cooling sensation agent arrangement region 70 is only one of the skin surface sheets 46. That is, since the cooling sensation agent is provided at a position close to the wearer's skin with one sheet member sandwiched between them, it is possible to make the wearer feel a sufficient cooling sensation effect while suppressing skin troubles.

Further, among the sheet members constituting the waist circumference member 20 (rear side waist circumference portion 40), the sheet members adjacent to the skin side and the non-skin side of the cooling sensation agent arrangement region 70 are formed of a non-woven fabric containing a melt blown layer. Is desirable. Since the non-woven fabric containing the melt blown layer is composed of ultrafine fibers, the fiber density is high, whereby the cooling agent (microcapsules) is shed from the inside to the outside in the thickness direction through the non-woven fabric. It can be suppressed from being stored. In the present embodiment, the skin surface sheet 46 adjacent to the skin side of the cooling sensation agent placement area 70 and the skin side sheet 41 adjacent to the non-skin side of the cooling sensation agent placement area 70 are both SMS containing a melt blown layer. It is composed of non-woven fabric. Therefore, the cooling sensation agent provided in the cooling sensation agent arranging region 70 is less likely to fall off to the outside in the thickness direction, and the cooling sensation function is less likely to be lost.

Further, in the waistline member 20 of the diaper 1, a plurality of wrinkles are formed on the surface of the waistline

elastic members

35 and 45 by contracting in the left-right direction (see FIG. 1). That is, the waistline member 20 has a portion where irregularities are formed in the thickness direction when worn or in a natural state.
When viewed in the thickness direction, it is desirable that the portion where the unevenness is formed and the cooling sensation agent placement region 70 overlap at least a part. The unevenness forms a portion where the waist member 20 easily hits and a portion where the waist circumference member 20 does not easily hit the wearer's body, so that a portion where the cooling sensation agent easily acts and a portion where the cooling sensation agent does not easily act are formed. The function can be expressed. Therefore, it is possible to easily maintain the comfort when wearing the diaper 1.

<Modification example>
FIG. 6 is a schematic cross-sectional view showing a modified example of the waistline member 20 of the diaper 1. FIG. 6 is a diagram corresponding to FIG. 3, and shows a cross-sectional state in the thickness direction of the diaper 1 in the expanded and extended state at the center position in the left-right direction. In this modification, the skin surface sheet 36 is not provided in the front waist circumference portion 30. Then, a part of the non-skin side sheet 32 is folded back at the upper end 30eu of the front waist circumference portion 30 from the non-skin side in the thickness direction to the skin side and from the upper side to the lower side in the vertical direction (vertical direction). It has a portion 32f. Similarly, the skin surface sheet 46 is not provided in the rear waist circumference portion 40, and a folded portion 42f in which a part of the non-skin side sheet 42 is folded back at the upper end 40eu of the rear waist circumference portion 40 is provided. There is. By covering the folded

portions

32f and 42f from the skin side so as to straddle the upper ends 10ea and 10eb of the absorbent main body 10, the same functions as the

skin surface sheets

36 and 46 are realized. That is, in the modified example of FIG. 6, the folded

portions

32f and 42f correspond to the

skin surface sheets

36 and 46.

In the modified example of FIG. 6, in the rear waist circumference portion 40, a cooling sensation agent (microcapsule) is provided between the skin side sheet 41 and the folded-back portion 42f, and a cooling sensation agent placement region 70 is formed.
Even with such a configuration, it is possible to realize the same effect as the above-mentioned cooling sensation agent arrangement region 70.

Next, FIG. 7 is a plan view showing a modified example of the cooling sensation agent arrangement region 70. FIG. 7 is a diagram corresponding to FIG. 4, and shows a plane of the diaper 1 in an expanded and extended state.
In the modified example of FIG. 7, in addition to the above-mentioned first cooling sensation agent arranging region 71 and the second cooling sensation agent arranging region 72, a third cooling sensation agent arranging region 73 is provided. The first cooling sensation agent placement region 71 and the second cooling sensation agent placement region 72 are the same as those described in FIG.

The third cooling sensation agent placement region 73 is a region in the waist circumference member 20 where the same cooling sensation agent (microcapsules) as the first cooling sensation agent placement region 71 and the like are provided. In the modified example shown in FIG. 7, a plurality of third cooling sensitizer placement regions 73 along the peripheral edge portion of the buttock cover 40b at the lower side in the vertical direction from the lower end of the side joint portion 50 in the rear waist circumference portion 40. Is placed. The first cooling sensation agent placement region 71 and the second cooling sensation agent placement region 72 are provided above the waist circumference member 20, while the third cooling sensation agent placement region 73 is provided below the waist circumference member 20. ing. In this way, by providing the cooling sensation agent near the leg opening LH, it is possible to make it easier for the wearer of the diaper 1 to feel the cooling sensation effect even when the legs are moved or sat down. ..

Then, when viewed in the thickness direction, the third cooling sensation agent placement region 73 has a portion overlapping with the elastic member around the hind legs 47. With such a configuration, when the diaper 1 is worn, the contraction force due to the elastic member around the legs acts, and the third cooling sensation agent placement region 73 easily adheres to the wearer's skin. Therefore, even if the wearer walks or moves his / her legs while wearing the diaper 1, the buttocks cover 40b is less likely to be rolled up, and the cooling sensation effect can be enhanced along the leg circumference opening LH. This makes it possible to give the wearer a better refreshing feeling.

=== Other embodiments ===
Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the interpretation of the present invention. Further, it is needless to say that the present invention can be changed or improved without departing from the spirit thereof, and the present invention includes an equivalent thereof.

In the above-described embodiment, as the cooling sensation agent forming the cooling sensation agent placement region 70, a substance such as menthol acting on the receptor activation channel (TRPM8) has been exemplified, but the present invention is not limited to this. Other substances may be used as long as they act on the skin.

In the above-described embodiment, the

skin surface sheets

36, 46 and the folded

portions

32f, 42f, in which the non-skin side sheet is folded back, are provided on the skin side surface of the waist circumference member 20, but a part of these sheet members is blue. A colored portion (not shown) colored with a cold color such as green or green may be provided. By visually recognizing the colored portion colored with a cool color, it is possible to easily remind the wearer of the refreshing sensation of the cooling sensation agent. Further, in the thickness direction, the coloring portion may be arranged so as to overlap with the cooling sensation agent arranging region 70 so that the presence of the cooling sensation agent can be visually recognized. By doing so, the wearer can at a glance understand at which part the cooling sensation effect is exhibited, so that the wearer can wear the diaper 1 with peace of mind.

1 Diapers (absorbent articles),
10 Absorbent body,
10ea upper end (anterior, ventral), 10eb upper end (posterior, dorsal),
11 Absorbent core, 11b core wrap sheet, 11c constriction,
12 top sheet,
13 back sheet, 13a liquid impermeable sheet, 13b exterior sheet,
20 Girth member,
30 Front waistline,
30eu top, 30sw side,
31 skin side sheet, 32 non-skin side sheet, 32f folded part,
35 Girth elastic member,
36 skin sheet,
40 Rear waist circumference, 40b Buttocks cover,
40eu top, 40sw side,
41 skin side sheet, 42 non-skin side sheet, 42f folded part,
45 Girth elastic member,
46 skin sheet, 47 elastic member around the hind legs,
50 side joints,
60 body joint,
61 front body joint, 62 rear body joint,
70 Cooling agent placement area,
71 1st cooling sensation agent placement area, 72 2nd cooling sensation agent placement area,
73 Third cooling agent placement area,
75 Cooling agent non-placement area,
BH waist opening, LH leg opening,
CL center position (vertical direction, longitudinal direction),
OL30 front overlap area, OL40 rear overlap area

Claims

A cooling sensation agent placement region having a liquid-absorbing absorbent body and a waistline member joined to the non-skin side of the absorbent body, and a cooling sensation agent provided at least a part of the waistline member. , An absorbent article comprising a cooling sensation non-arranged region not provided with the cooling sensitizer.
It has a main body joint in which an adhesive for joining the absorbent main body and the waistline member is arranged, and when the absorbent article is unfolded and viewed in the thickness direction, the main body joint and the cold An absorbent article characterized in that the non-sensitive area overlaps at least in part.
The absorbent article according to claim 1.
More than the total weight of the cooling sensitizers provided in the area where the girth member and the absorbent body overlap.
An absorbent article, characterized in that the total weight of the cooling sensitizers provided in a region where the waist member and the absorbent body do not overlap is larger.
The absorbent article according to claim 1 or 2.
An absorbent article characterized in that, when viewed in the thickness direction, the entire joint of the main body overlaps with the cooling sensation non-arranged region.
The absorbent article according to any one of claims 1 to 3.
The girth member has a front girth portion and a posterior girth portion.
More than the total weight of the cooling sensitizers provided on the front waist circumference
An absorbent article characterized in that the total weight of the cooling sensitizers provided on the rear waist circumference is larger.
The absorbent article according to claim 4.
The cooling sensation agent placement region is characterized in that when the absorbent article is worn, it is placed at a portion on the dorsal side of the wearer that abuts on the region from the posterior superior iliac spine to the iliac ridge. Absorbent article.
The absorbent article according to claim 4 or 5.
It has a vertical direction and a horizontal direction that intersect each other,
An absorbent article characterized in that the cooling sensation agent placement region is provided between the upper end of the rear waist circumference member and the rear upper end of the absorbent body in the vertical direction.
The absorbent article according to any one of claims 4 to 6.
It has a vertical direction and a horizontal direction that intersect each other,
An absorbent article characterized in that the cooling sensation agent placement region has a discontinuous portion in the central portion in the left-right direction.
The absorbent article according to claim 7.
The absorbent article is characterized in that the cooling sensation agent placement region has a discontinuous portion straddling the central position of the absorbent article in the left-right direction.
The absorbent article according to any one of claims 4 to 8.
It has a vertical direction and a horizontal direction that intersect each other,
At both ends in the left-right direction, side joining portions for joining the front waist circumference portion and the rear waist circumference portion are provided.
An absorbent article characterized in that, in the left-right direction, the cooling sensitizer placement region is arranged at a predetermined distance from the side joint portion.
The absorbent article according to any one of claims 4 to 9.
It has a vertical direction and a horizontal direction that intersect each other,
An absorbent article characterized in that, in the vertical direction, the cooling sensation agent placement region is arranged at a predetermined distance from the upper end of the waist circumference member.
The absorbent article according to any one of claims 4 to 10.
It has a vertical direction and a horizontal direction that intersect each other,
The cooling sensation agent arranging region has a first cooling sensation agent arranging region and a second cooling sensation agent arranging region separated from the lower side in the vertical direction of the first cooling sensation agent arranging region. An absorbent article characterized by.
The absorbent article according to claim 11.
An absorbent article characterized in that the width of the first cooling sensation agent placement region in the vertical direction is equal to or larger than the width of the second cooling sensation agent placement region in the vertical direction.
The absorbent article according to claim 11 or 12.
In the vertical direction, the skin-side sheet and the non-skin-side sheet of the rear waist circumference member are joined in the thickness direction between the first cooling sensation agent placement region and the second cooling sensation agent placement region. An absorbent article characterized in that it is provided with a joint.
The absorbent article according to any one of claims 1 to 13.
It has a vertical direction and a horizontal direction that intersect each other,
The waistline member has a waistline elastic member that expands and contracts in the left-right direction.
Of the waistline member, the region overlapping the cooling sensation agent placement region in the vertical direction is defined as the first region, adjacent to the lower side of the first region, and the cooling sensation agent placement region in the vertical direction. When the non-overlapping area is the second area,
An absorbent article characterized in that the lateral stress of the waistline elastic member in the first region is larger than the left-right stress of the waistline elastic member in the second region.
The absorbent article according to claim 14.
An absorbent article characterized in that, when viewed in the thickness direction, the cooling sensation agent placement region and the waistline elastic member have an overlapping portion.
The absorbent article according to claim 14.
An absorbent article characterized in that, when viewed in the thickness direction, the cooling sensation agent placement region and the waistline elastic member do not have an overlapping portion.
The absorbent article according to any one of claims 1 to 16.
The waistline member includes a skin-side sheet, a non-skin-side sheet, and a skin-side sheet laminated on the skin-side of the skin-side sheet.
The cooling sensation agent is an absorbent article, which is provided between the skin-side sheet and the skin-side sheet.
The absorbent article according to any one of claims 1 to 17.
An absorbent article characterized in that the sheet members adjacent to the skin side and the non-skin side of the cooling sensation agent placement region are non-woven fabrics containing a melt blown layer, respectively.
The absorbent article according to any one of claims 1 to 18.
It has a vertical direction and a horizontal direction that intersect each other,
The girth member has a front girth portion and a posterior girth portion.
At both ends in the left-right direction, side joining portions for joining the front waist circumference portion and the rear waist circumference portion are provided.
An absorbent article characterized in that, in the vertical direction, the cooling sensation agent placement region is provided below the lower end of the side joint portion.
The absorbent article according to claim 19.
It has a rear leg circumference elastic member along the lower end edge of the rear waist circumference portion.
An absorbent article characterized in that the elastic member around the rear leg and the cooling sensation agent placement region have a portion overlapping when viewed in the thickness direction.
The absorbent article according to any one of claims 1 to 20.
The waistline member has a portion where irregularities are formed in the thickness direction when the absorbent article is worn or in a natural state.
An absorbent article characterized by having a portion where the unevenness is formed and the cooling sensation agent placement region overlap when viewed in the thickness direction.