Absorbent article

Abstract

An absorbent article (1) has an absorbent main body (10) and a waistline member (20) joined to a non-skin side of the absorbent main body (10), at least a part of the waistline member (20) has a cool-feeling agent arrangement region (70) provided with a cool-feeling agent and a cool-feeling agent non-arrangement region (75) not provided with the cool-feeling agent, wherein a main body joining portion (60) provided with an adhesive joining the absorbent main body (10) and the waistline member (20) is overlapped with the cool-feeling agent non-arrangement region (75) at least in a part when viewed in a thickness direction in a state where the absorbent article (1) is spread.

Description

TECHNICAL FIELD

[0001] The present application relates to an absorbent article. BACKGROUND

[0002] In the past, there has been known a technique in which, in an absorbent article such as a panty-type disposable diaper provided with a waistline member and an absorbent main body, a functional material such as a cooling agent or a perfume is disposed in the waistline member in order to provide a cool feeling to a wearer. For example, in Patent Literature 1, there is disclosed a panty-type absorbent article which contains a perfume that diffuses a fragrance component into the atmosphere at atmospheric pressure in the waist region of the abdominal side portion A and the back side portion C (corresponding to the waistline member).

[0003] PRIOR ART LITERATURE

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Laid-Open No. 2018-102612 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the panty-type absorbent article of Patent Literature 1, the perfume is disposed so as to overlap a part of a joint portion at which the waistline member and the absorbent main body are joined in the thickness direction. In this case, the oil component of the perfume and the adhesive that forms the joint portion are mixed together, and there is a possibility that the joint strength of the joint portion is reduced. In addition, in the region where the waistline member and the absorbent main body are joined, the stretchability of the waistline member is easily hindered by the rigidity of the absorbent main body, and the waistline member is difficult to be closely attached to the wearer's body, and there is a possibility that the functional material such as the perfume is difficult to act on the wearer's skin.

[0008] The present application has been made in view of the above-described conventional problems, and has an object to provide an absorbent article provided with a cooling agent that easily acts on a wearer's skin without reducing the joint strength of a waistline member and an absorbent main body.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] The main application for achieving the above object is an absorbent article having an absorbent main body that absorbs liquid and a waistline member that is joined to the non-skin side of the absorbent main body, and provided with a cooling agent disposition region in which a cooling agent is provided and a cooling agent non-disposition region in which the cooling agent is not provided in at least a part of the waistline member, characterized in that the absorbent article has a main body joint portion in which an adhesive that joins the absorbent main body and the waistline member is disposed, and the main body joint portion overlaps the cooling agent non-disposition region at least in a part when viewed in the thickness direction in a state in which the absorbent article is spread out.

[0011] Other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings.

[0012] Effects of the Invention

[0013] According to the present application, it is possible to provide an absorbent article that is provided with a cooling agent that easily acts on the skin of a wearer without reducing the joining strength of the waist member to the absorbent main body. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic perspective view of a diaper 1.

[0015] Figure 2 is a plan view of the diaper 1 in an unfolded and elongated state.

[0016] Figure 3 is a schematic cross-sectional view at line A-A of Figure 2

[0017] Figure 4 is a plan view showing an example of a cooling agent arrangement region 70 in the diaper 1 in an unfolded and elongated state.

[0018] Figure 5 is a diagram illustrating the positional relationship between the body of a wearer when wearing the diaper 1 and the cooling agent arrangement region 70.

[0019] Figure 6 is a schematic cross-sectional view showing a modification example of the waist member 20 of the diaper 1.

[0020] Figure 7 is a plan view showing a modification example of the cooling agent arrangement region 70. DETAILED DESCRIPTION

[0021] From the description of the present specification and the drawings, at least the following matters will become apparent.

[0022] An absorbent article having an absorbent main body that absorbs liquid and a waist member joined to the non-skin side of the absorbent main body, the absorbent article being provided with a cooling agent arrangement region provided with a cooling agent and a cooling agent non-arrangement region in which the cooling agent is not provided in at least a portion of the waist member, characterized in that the absorbent article has a main body joining portion in which an adhesive that joins the absorbent main body and the waist member is arranged, and when viewed in the thickness direction in a state in which the absorbent article is unfolded, the main body joining portion overlaps the cooling agent non-arrangement region at least in a portion.

[0023] ​According to such an absorbent article, since the adhesive forming the main body joint portion and the cooling agent are difficult to mix, the joint strength of the absorbent main body and the waist circumference member is difficult to decrease. In addition, the cooling agent arrangement region among the waist circumference member is difficult to be affected by the rigidity caused by the absorbent main body, and thus the cooling agent arrangement region is easily matched to the wearer's skin when the absorbent article is worn. Thus, an absorbent article in which the joint strength of the waist circumference member and the absorbent main body is not decreased and the cooling agent is easily applied to the wearer's skin can be achieved.

[0024] In the absorbent article, it is preferable that the total weight of the cooling agent provided in the region where the waist circumference member and the absorbent main body do not overlap be greater than the total weight of the cooling agent provided in the region where the waist circumference member and the absorbent main body overlap.

[0025] According to such an absorbent article, in the case where the cooling agent is provided in the region among the waist circumference member that overlaps the absorbent main body, the cooling agent is difficult to reach the wearer's skin by being sandwiched between the wearer's skin and the cooling agent, and there is a possibility that the cooling effect is difficult to be generated. In contrast, by providing more cooling agent in the region that does not overlap the absorbent main body than in the region that overlaps the absorbent main body, the cooling effect is inhibited from being hindered by the absorbent main body, and the wearer can more easily feel the cooling effect.

[0026] In the absorbent article, it is preferable that the entire main body joint portion overlap the non-cooling agent arrangement region when viewed in the thickness direction.

[0027] According to such an absorbent article, the adhesive forming the main body joint portion and the cooling agent are less likely to mix, and the joint strength of the absorbent main body and the waist circumference member is easily inhibited from decreasing. In addition, by not overlapping the absorbent main body that has high rigidity, the cooling agent arrangement region is more easily matched to the wearer's skin, and the wearer can easily feel the cooling effect.

[0028] In the absorbent article, it is preferable that the waist circumference member have a front waist circumference portion and a back waist circumference portion, and the total weight of the cooling agent provided in the back waist circumference portion be greater than the total weight of the cooling agent provided in the front waist circumference portion.

[0029] According to such an absorbent article, a large amount of cooling agent is arranged in the back side (dorsal side) compared to the front side (ventral side), and the wearer can feel a stronger cooling effect in the dorsal side where sweating is easy. Thus, a good cooling feeling can be provided to the wearer's dorsal side.

[0030] In the absorbent article, it is preferable that the cooling agent arrangement region be arranged at a position that comes into contact with the region of the wearer's dorsal side from the posterior superior iliac spine to the iliac crest when the absorbent article is worn.

[0031] According to such an absorbent article, in the region, the waist member (cooling agent arrangement region) easily adheres to the wearer's skin due to the protrusion of the iliac crest, and the wearer can easily feel the cooling effect of the cooling agent. In particular, in the case where the wearer sits or maintains a lying posture, sweating easily occurs in the region, and thus, the comfort provided by the cooling agent can be further improved.

[0032] In the absorbent article, it is preferable that the absorbent article have an up-and-down direction and a left-and-right direction that intersect each other, and the cooling agent arrangement region be provided between the upper end of the rear waist member and the upper end of the rear side of the absorbent main body in the up-and-down direction.

[0033] According to such an absorbent article, by providing the cooling agent arrangement region in the vicinity of the upper end of the rear waist portion where sweating occurs and sweating is concentrated, the wearer can easily feel coolness in the region, and the discomfort caused by sweating and heat can be reduced.

[0034] In the absorbent article, it is preferable that the absorbent article have an up-and-down direction and a left-and-right direction that intersect each other, and the cooling agent arrangement region have a discontinuous portion in the central portion in the left-and-right direction.

[0035] According to such an absorbent article, compared to the case where the cooling agent arrangement region is continuously provided in the left-and-right direction, even if the discontinuous portion is provided in the central portion where the concave portion between the left and right iliac crests abuts, the cool feeling provided to the wearer does not easily differ. Thus, by not providing the cooling agent in the central portion, a good cooling effect can be maintained, and the cost of the cooling agent arrangement can be reduced.

[0036] In the absorbent article, it is preferable that the cooling agent arrangement region have a discontinuous portion that spans the central position of the absorbent article in the left-and-right direction.

[0037] According to such an absorbent article, the central position in the left-and-right direction is a portion where the gap between the body between the iliac crests and the rear waist portion is the largest and it is difficult to provide a cool feeling to the wearer, and thus, by providing the discontinuous portion of the cooling agent arrangement region in a manner that spans the central position, the cost can be reduced, and the cooling agent arrangement region can be efficiently formed without reducing the cooling effect. In addition, since the cooling agent is not arranged in the region where the gap is large, air easily permeates in the up-and-down direction, and it is difficult to cause heat to occur when the absorbent article is worn.

[0038] In the absorbent article, it is preferable that the absorbent article have an up-down direction and a left-right direction intersecting each other, and that the cool-feeling agent arrangement region be arranged at a prescribed distance from the side joint portion in the left-right direction.

[0039] According to such an absorbent article, by arranging the cool-feeling agent in a manner not overlapping the side joint portion, it is possible to suppress a decrease in the joint strength of the side joint portion due to the influence of the oil contained in the cool-feeling agent. As a result, the front waistline portion and the rear waistline portion are difficult to peel apart.

[0040] In the absorbent article, it is preferable that the absorbent article have an up-down direction and a left-right direction intersecting each other, and that the cool-feeling agent arrangement region be arranged at a prescribed distance from the upper end of the waistline member in the up-down direction.

[0041] According to such an absorbent article, since the upper end edge of the waistline member has a high probability of coming into contact with the clothes of the wearer when the absorbent article is worn, by arranging the cool-feeling agent in a manner not overlapping the upper end edge, it is possible to suppress the cool-feeling agent from adhering to the clothes of the wearer.

[0042] In the absorbent article, it is preferable that the absorbent article have an up-down direction and a left-right direction intersecting each other, and that the cool-feeling agent arrangement region have a first cool-feeling agent arrangement region and a second cool-feeling agent arrangement region separated from the first cool-feeling agent arrangement region in the up-down direction.

[0043] According to such an absorbent article, even if a wrinkle is generated in the waistline member when the wearer moves the body when the absorbent article is worn, at least either of the two cool-feeling agent arrangement regions in the up-down direction has a high probability of coming into close contact with the skin of the wearer. As a result, it is possible to make the wearer more likely to feel the cool-feeling effect.

[0044] In the absorbent article, it is preferable that the width of the first cool-feeling agent arrangement region in the up-down direction be equal to or greater than the width of the second cool-feeling agent arrangement region in the up-down direction.

[0045] According to such an absorbent article, in the region above the waistline where sweating is likely to occur, it is possible to increase the probability of the first cool-feeling agent arrangement region coming into close contact with the skin of the wearer. As a result, it is possible to increase the cool-feeling effect in the region where sweat is likely to accumulate when the absorbent article is worn.

[0046] In the absorbent article, it is preferable that, in the up-down direction, between the first cool-feeling agent arrangement region and the second cool-feeling agent arrangement region, there be a joint portion that joins the skin-side sheet and the non-skin-side sheet of the rear waistline member in the thickness direction.

[0047] According to such an absorbent article, the skin-side sheet and the non-skin-side sheet are joined to each other in the region between the first cooling agent arrangement region and the second cooling agent arrangement region, so that the region is difficult to be separated from the wearer's skin when the absorbent article is worn. Thus, the first cooling agent arrangement region and the second cooling agent arrangement region provided above and below the region are in close contact with the wearer's skin, respectively, so that the wearer can more easily feel the cooling effect.

[0048] In the absorbent article, it is preferable that the absorbent article have an up-down direction and a left-right direction which cross each other, the waistline member have a waistline elastic member which stretches and contracts in the left-right direction, and a region in which the up-down direction overlaps with the cooling agent arrangement region be provided as a first region in the waistline member, a region which is adjacent to a lower side of the first region and in which the up-down direction does not overlap with the cooling agent arrangement region be provided as a second region, and the stress of the waistline elastic member in the left-right direction in the first region be greater than the stress of the waistline elastic member in the left-right direction in the second region.

[0049] According to such an absorbent article, the stress of the waistline elastic member is increased in the first region overlapping with the cooling agent arrangement region, and the rear waistline portion (cooling agent arrangement region) is more easily in close contact with the wearer's skin in the first region, so that the wearer can more easily feel the cooling effect.

[0050] In the absorbent article, it is preferable that the absorbent article have a portion in which the cooling agent arrangement region overlaps with the waistline elastic member when viewed in the thickness direction.

[0051] According to such an absorbent article, the contraction force of the waistline elastic member easily acts directly on the cooling agent arrangement region. Thus, the cooling agent arrangement region is pressed against the wearer's skin when the absorbent article is worn, so that the cooling effect can be improved.

[0052] In the absorbent article, it is preferable that the absorbent article not have a portion in which the cooling agent arrangement region overlaps with the waistline elastic member when viewed in the thickness direction.

[0053] According to such an absorbent article, the oil of the cooling agent provided in the cooling agent arrangement region and the adhesive attached to the waistline elastic member are inhibited from mixing to cause a decrease in the joining force. Thus, the position of the waistline elastic member is easily inhibited from being shifted, and the like.

[0054] In the absorbent article, it is preferable that the waistline member have a skin-side sheet, a non-skin-side sheet, and a skin-facing sheet laminated on the skin side of the skin-side sheet, and the cooling agent be provided between the skin-side sheet and the skin-facing sheet.

[0055] According to such an absorbent article, it is possible to provide the cooling agent near the skin of the wearer and to inhibit the cooling agent from directly contacting the skin of the wearer. Thus, it is possible to inhibit skin problems and to provide the wearer with a sufficient cooling effect.

[0056] In the absorbent article, it is preferable that sheet members adjacent to the skin side and the non-skin side of the cooling agent arrangement region described above are nonwoven fabrics including a melt-blown layer.

[0057] According to such an absorbent article, since the nonwoven fabric including a melt-blown layer is formed of fine fibers, the fiber density is high, and thus it is possible to inhibit the cooling agent from leaking from the inside to the outside in the thickness direction through the waist circumference member.

[0058] In the absorbent article, it is preferable that the absorbent article has an up-down direction and a left-right direction that cross each other, the waist circumference member has a front waist circumference portion and a rear waist circumference portion, the waist circumference member has a side joint portion that joins the front waist circumference portion and the rear waist circumference portion at both end portions in the left-right direction, and the cooling agent arrangement region is provided at a position lower than the lower end of the side joint portion in the up-down direction.

[0059] According to such an absorbent article, by providing the cooling agent arrangement region below the waist circumference member, it is possible to easily feel the cooling effect even when the wearer of the absorbent article moves the thighs or sits down.

[0060] In the absorbent article, it is preferable that the absorbent article has a rear leg circumference elastic member along the lower edge portion of the rear waist circumference portion, and the absorbent article has a portion in which the rear leg circumference elastic member overlaps the cooling agent arrangement region when viewed in the thickness direction.

[0061] According to such an absorbent article, even when the wearer walks or moves the thighs while wearing the absorbent article, the lower edge portion of the rear waist circumference portion (the hip cover) is difficult to roll up, and it is possible to improve the cooling effect along the leg opening. Thus, it is possible to provide the wearer with a more comfortable cool feeling.

[0062] In the absorbent article, it is preferable that the waist circumference member has a portion in which a concave-convex is formed in the thickness direction when the absorbent article is worn or in a natural state, and the absorbent article has a portion in which the portion in which the concave-convex is formed overlaps the cooling agent arrangement region when viewed in the thickness direction.

[0063] According to such an absorbent article, by forming the portion of the waist circumference member that easily comes into contact with the body of the wearer and the portion that is difficult to come into contact with the body of the wearer with the concave-convex, it is possible to form the portion in which the cooling agent easily acts and the portion in which the cooling agent does not easily act, and to exhibit the cooling function for a long time. Thus, it is possible to easily maintain the comfort when the absorbent article is worn.

[0064] ===Implementation Methods===

[0065] As an absorbent article involved in this invention, a disposable diaper in the form of underwear (hereinafter also referred to as "diaper 1") will be used as an example for explanation. The absorbent articles involved in this invention also include sanitary napkins in the form of shorts or other absorbent articles in the form of underwear (shorts).

[0066] <The Composition of Diaper 1>

[0067] Figure 1 This is a rough 3D diagram of Diaper 1. Figure 2 This is a top view of diaper 1 in its unfolded and extended state. Figure 3 yes Figure 2 A schematic cross-sectional view at line A-A. In addition, the "stretched state" of diaper 1 refers to the state in which diaper 1 as a whole (the whole product) is stretched without wrinkles, specifically, it means that it is stretched until the size of each component constituting diaper 1 (such as the absorbent body 10, waistband component 20, etc., described later) becomes the same as or close to the size of the individual component.

[0068] Diaper 1 Figure 1 In the underwear-style configuration shown, there are intersecting vertical, horizontal, and front-back directions, and there is a waist opening BH and a pair of leg openings LH and LH.

[0069] The upper side of the waistband opening (BH side) corresponds to the lower side, and the lower side corresponds to the crotch side. Additionally, the front side corresponds to the wearer's abdomen, and the back side corresponds to the wearer's back. Furthermore, in... Figure 2 In its unfolded state, diaper 1 has intersecting longitudinal and transverse directions. The longitudinal direction is along... Figure 1 The vertical direction is equivalent to the length direction of the absorbent body 10. The horizontal direction is along... Figure 1 The left and right directions within. Additionally, such as... Figure 3 As shown, the direction in which the material layers constituting diaper 1 are laid is defined as the thickness direction. The side in the thickness direction that comes into contact with the wearer's skin is defined as the skin side, and the opposite side is defined as the non-skin side.

[0070] The diaper 1 has an absorbent body 10 and a waistband member 20 disposed on the non-skin side of the absorbent body 10. Furthermore, the waistband member 20 has a front waistband portion 30 corresponding to the front of the diaper 1 and a rear waistband portion 40 corresponding to the back of the diaper 1. That is, the diaper 1 of this embodiment is a so-called three-part underwear-type diaper, with the absorbent body 10 as the first part, which is attached to the wearer's crotch to absorb urine and other excrement; the front waistband portion 30 as the second part, which covers the wearer's abdominal side; and the rear waistband portion 40 as the third part, which covers the wearer's back side.

[0071] In Figure 2 the unfolded state, the front waistline portion 30 and the rear waistline portion 40 are arranged in parallel with each other with a longitudinal space therebetween, and the absorbent main body 10 is disposed between them. Also, each end portion 10ea, 10eb of the length direction (corresponding to the longitudinal direction of the diaper 1) of the absorbent main body 10 is joined and fixed to the skin side of the closest waistline portion 30, 40 via the main body joint portion 60. Figure 2

[0072] Specifically, in the front side overlap region OL30 where the absorbent main body 10 overlaps the front waistline portion 30 in the thickness direction, the non-skin side surface of the absorbent main body 10 is joined to the skin side surface of the front waistline portion 30 by the front side main body joint portion 61 (main body joint portion 60) formed by an adhesive such as a hot-melt adhesive (see Figure 2 and Figure 3 ). Similarly, in the rear side overlap region OL40 where the absorbent main body 10 overlaps the rear waistline portion 40 in the thickness direction, the non-skin side surface of the absorbent main body 10 is joined to the skin side surface of the rear waistline portion 40 by the rear side main body joint portion 62 (main body joint portion 60) formed by an adhesive such as a hot-melt adhesive.

[0073] Also, from the unfolded state, the absorbent main body 10 is folded in two at the central position CL in the longitudinal direction as the folding position (folding line). In the folded state, the front waistline portion 30 and the rear waistline portion 40 facing each other are joined and connected to each other at the side portions 30sw and 40sw on both sides in the left-right direction, forming a pair of side joint portions 50, 50. That is, the front waistline portion 30 and the rear waistline portion 40 are shaped into a ring shape by the pair of side joint portions 50, 50. Note that the side joint portions 50 are formed by a known joining method such as fusion or adhesion.

[0074] Thus, the diaper 1 is formed into the briefs type state having the waist opening BH and a pair of leg openings LH, LH as shown in Figure 1

[0075] (Absorbent Main Body 10)

[0076] The absorbent main body 10 has an absorbent core 11 that absorbs excreted liquid, a topsheet 12 disposed at a position on the skin side in the thickness direction from the absorbent core 11, and a backsheet 13 disposed at a position on the non-skin side from the absorbent core 11 (see Figure 3 ). However, the absorbent main body 10 can have sheet members other than these. For example, a sub-sheet (not shown) can be provided between the topsheet 12 and the absorbent core 11 in the thickness direction.

[0077] ​​The absorbent core 11 is a component that absorbs and retains excretory fluids such as urine, and is formed, for example, from liquid-absorbent fibers such as pulp fibers infused with a superabsorbent polymer (SAP). Alternatively, the absorbent core 11 may also have its outer periphery covered by a liquid-permeable sheet component (core-covered sheet 11b) such as thin paper or nonwoven fabric. In this embodiment, the absorbent core 11 has a narrowing portion 11c, which decreases in width in the left-right direction, between its front and rear ends in the longitudinal direction. Figure 1 The shape is roughly hourglass when viewed from above, as shown. The narrowing portion 11c is the part that is sandwiched between the wearer's legs when wearing the diaper 1. By shortening the length (reducing the width) of this portion in the left-right direction, the absorbent core 11 can easily fit the wearer's crotch.

[0078] The top sheet 12 is a liquid-permeable sheet, such as a hydrophilic hot-air nonwoven fabric or spunbond nonwoven fabric. Alternatively, the top sheet 12 can be configured such that its two sides in the left-right direction are folded back from the skin side to the non-skin side in the thickness direction to enclose the absorbent core 11. Figure 3 (Not shown in the image).

[0079] The substrate 13 has a two-layer structure consisting of a liquid-impermeable sheet 13a and a hydrophobic outer sheet 13b disposed on its non-skin side. The liquid-impermeable sheet 13a may be, for example, a resin film, and the outer sheet 13b may be, for example, a soft nonwoven fabric.

[0080] Alternatively, a pair of leak-proof walls can be provided on both sides of the absorbent body 10 in the left-right direction along the longitudinal direction (the length direction of the absorbent body 10). Figure 3 (Not shown in the figure). For example, by extending a portion of the outer sheet 13b outward from both ends of the absorbent core 11 and bending it towards the skin in the left-right (lateral) direction, a pair of leak-proof walls can be formed. By providing such leak-proof walls, it is easy to suppress side leakage of excrement absorbed by the absorbent body 10 when the diaper 1 is worn.

[0081] (Front waist circumference 30)

[0082] like Figure 3 As shown, the front waist portion 30 has: a skin side sheet 31 disposed on the skin side in the thickness direction; a non-skin side sheet 32 ​​laminated in a manner adjacent to the non-skin side of the skin side sheet 31; and a waist elastic member 35 disposed between the skin side sheet 31 and the non-skin side sheet 32 ​​in the thickness direction.

[0083] Skin side sheet 31 and non-skin side sheet 32 ​​are Figure 2 The sheet component shown is rectangular in shape when viewed from above, for example, formed from SMS (spunbond-meltblown-spunbond) nonwoven fabric.

[0084] The waist elastic member 35 is formed of, for example, a rubber thread or the like, and is attached between the skin-side sheet 31 and the non-skin-side sheet 32 in a state in which a plurality of members are arranged in the up-and-down direction and elongated in the left-and-right direction. The stretchability exhibited by the waist elastic member 35 allows the front waist portion 30 to fit the waist of the wearer.

[0085] The attachment of the waist elastic member 35 can be performed using an adhesive such as a hot-melt adhesive. For example, the hot-melt adhesive can be applied to the waist elastic member 35, which is then elongated at a prescribed elongation ratio and sandwiched by the skin-side sheet 31 and the non-skin-side sheet 32, thereby attaching the waist elastic member 35. That is, the skin-side sheet 31 and the non-skin-side sheet 32 are joined by the adhesive with the waist elastic member 35 interposed therebetween. Alternatively, the adhesive can not be applied to the waist elastic member 35, but can be applied to the skin-side sheet 31 and the non-skin-side sheet 32, thereby attaching the waist elastic member 35.

[0086] Further, a skin surface sheet 36 is laminated on a part of the surface of the front waist portion 30 on the most skin-side. The skin surface sheet 36 is a sheet member configured to cover (span in the up-and-down direction) the upper end 10ea (front end in the longitudinal direction) of the abdomen-side of the absorbent main body 10 from the skin-side, as shown in FIG. 1, and has a function as a cover sheet. Thus, the edge of the upper end of the absorbent main body 10 can be inhibited from biting into the skin of the wearer when the diaper 1 is worn. The skin surface sheet 36 is formed of, for example, an SMS nonwoven fabric or the like. Alternatively, the skin surface sheet 36 can be a sheet member having stretchability in the left-and-right direction (for example, a stretchable nonwoven fabric). Figure 3

[0087] (Rear waist portion 40)

[0088] The rear waist portion 40 has substantially the same configuration as the front waist portion 30. That is, the rear waist portion 40 has a skin-side sheet 41 disposed on the skin-side in the thickness direction, a non-skin-side sheet 42 laminated in abutment with the non-skin-side of the skin-side sheet 41, and a plurality of waist elastic members 45 provided between the skin-side sheet 41 and the non-skin-side sheet 42 in the thickness direction. The configuration of each member is substantially the same as that of the front waist portion 30, and thus the description thereof is omitted.

[0089] On the other hand, the outer shape of the rear waist portion 40 is different from that of the front waist portion 30. Specifically, the rear waist portion 40 has a hip cover 40b that is substantially trapezoidal in shape on a part on the lower side in the up-and-down direction than the side joint portion 50 (side portion 40sw), as shown in FIG. 1. The hip cover 40b is smaller in the left-and-right direction from the upper side to the lower side in the up-and-down direction, and the outer edge thereof is a curved portion. By providing the hip cover 40b, the hip of the wearer can be covered by the rear waist portion 40 over a wide range when the diaper 1 is worn. Figure 2

[0090] ​​Furthermore, the buttock bra 40b is equipped with Figure 2 The elastic member 47 of the back leg opening is made of rubber thread, as shown. The elastic member 47 of the back leg opening is installed between the skin side panel 41 and the non-skin side panel 42 in a state that extends along the periphery of the buttock cover 40b. With the elasticity of the elastic member 47 of the back leg opening, the buttock cover 40b of the back waist circumference 40 can easily match the wearer's buttocks when wearing the diaper 1, and it is also difficult to roll it up from the buttocks.

[0091] Additionally, similar to the front waist section 30, a skin sheet 46 is laminated on a portion of the skin-closest side of the rear waist section 40. The skin sheet 46 is as follows... Figure 3 As shown, the sheet member is configured to cover (stretch across in the vertical direction) the upper end 10eb (longitudinal rear end) of the back side of the absorbent body 10 from the skin side. Furthermore, the rear waistband 40 of the diaper 1 has a cooling agent placement area 70 between the skin sheet 46 and the skin side sheet 41 in the thickness direction, where a cooling agent is disposed.

[0092] <Cooling Agent Preparation Area 70>

[0093] Figure 4 This is a top view showing an example of the cooling agent placement area 70 in a diaper 1 in its unfolded and stretched state. Figure 4 As shown, in this embodiment, the diaper 1 has a cooling agent placement area 70 with a cooling agent in a portion of the rear waistband portion 40 of the waistband member 20. The cooling agent is disposed in shapes such as sheet-like, linear, spiral, Z-shaped, linear, or dot-like.

[0094] As the cooling agent used in this embodiment, substances generally known as cooling agents in the art can be used, preferably substances that are volatile and act on the receptor activation channel (TRPM8) in the nerves of the skin. Examples include menthol (e.g., L-menthol) and its derivatives (e.g., menthol lactate), methyl salicylate, camphor, cucumber extract, and essential oils from plants (e.g., peppermint, eucalyptus, nutmeg). Alternatively, the cooling agent preparation area 70 can be formed by applying water-dispersible microcapsules containing these cooling agents to a designated area. Details regarding the microcapsules will be described later.

[0095] exist Figure 4In the example of FIG. 6, a pair of cool-feeling agent arrangement regions 70, 70 are provided in the upper region of the rear waistline portion 40 in the vertical direction, that is, in the position closer to the upper end 40eu than the lower end 40ed of the rear waistline portion 40 in the vertical direction. The pair of cool-feeling agent arrangement regions 70, 70 are arranged apart by a prescribed distance gw70 in the lateral direction. Further, the pair of cool-feeling agent arrangement regions 70, 70 each have a first cool-feeling agent arrangement region 71 extending in a band shape in the lateral direction (transverse direction), and a second cool-feeling agent arrangement region 72 provided in the position lower than the first cool-feeling agent arrangement region 71 in the vertical direction. The first cool-feeling agent arrangement region 71 and the second cool-feeling agent arrangement region 72 are arranged apart by a prescribed distance gl70 in the vertical direction.

[0096] Further, in the waistline member 20 (the rear waistline portion 40), a region in which no cool-feeling agent (microcapsules) is provided is set as a cool-feeling agent non-arrangement region 75. For example, in the example of FIG. 6, the region between the pair of cool-feeling agent arrangement regions 70, 70 in the lateral direction (the region indicated by gw70) is the cool-feeling agent non-arrangement region 75. Also, the region between the first cool-feeling agent arrangement region 71 and the second cool-feeling agent arrangement region 72 in the vertical direction (the region indicated by gl70) is also the cool-feeling agent non-arrangement region 75. Figure 4

[0097] Further, the diaper 1 is shipped in a folded and bundled state on the market, and there is a possibility that the cool-feeling agent (microcapsules) will detach from the cool-feeling agent arrangement regions 70 and adhere to other regions (cool-feeling agent non-arrangement regions 75) of the diaper 1 when the product is transported or when the diaper 1 purchased by the user is opened. Further, when the diaper 1 is worn, there is a possibility that the cool-feeling agent (microcapsules) will also detach from the cool-feeling agent arrangement regions 70 due to the wearer moving their body or the nonwoven fabrics rubbing against each other. That is, even in the cool-feeling agent non-arrangement regions 75, there is a possibility that the cool-feeling agent (microcapsules) will be contained in a substantial degree of less than 1%. However, in the present embodiment, the region in which the detached cool-feeling agent (microcapsules) adheres unintentionally is not included in the cool-feeling agent arrangement regions 70. That is, the region in which the concentration of the cool-feeling agent (microcapsules) is explicitly lower than that of the cool-feeling agent arrangement regions 70, or the region in which the concentration of the cool-feeling agent is below a certain value, is set as the cool-feeling agent non-arrangement region 75.

[0098] ​However, in the case where the cooling agent is colorless and transparent, it is difficult to visually recognize the cooling agent application region 70. For example, the position of the cooling agent application region 70 can be confirmed by performing the following sensory test. First, the waistband member 20 in the unfolded state is divided (for example, divided into 10 equal parts in the longitudinal direction and 20 equal parts in the lateral direction) and cut, and the divided and cut member is further cut into pieces of a predetermined size (for example, 2 x 2 cm). Then, the cut member is peeled off one piece at a time, for example, by cold spraying, to produce a plurality of sample pieces (patches). Next, a PE sheet (polyethylene sheet, in one example, a sheet having high gas barrier properties) having the same size as the sample pieces is prepared in an amount corresponding to the sample pieces. Next, the PE sheet is overlaid on the first sample piece, and the first sample piece is placed on the inner sides of the two wrists of the tester for the sensory test, and the time until the tester feels a cooling effect from the sample piece is measured and recorded. This sensory test is performed on a plurality of sample pieces, and the time is measured and recorded for each sample piece. By performing this sensory test on the entire region and measuring and recording the time for all the sample pieces, the sample pieces to which the cooling agent is applied can be determined.

[0099] In addition, the determination of the cooling agent application region 70 can be performed using, for example, a headspace solid phase microextraction method. Specifically, using a gas chromatograph-mass spectrometer (for example, GCMS-QP2010 Plus manufactured by Shimadzu Corporation), helium gas is used as a carrier gas, the measurement mode is set to a scan method, and measurement is performed using an electron impact ionization method. In this method, each sample piece is formed in a state of being folded and balled into a small piece, and is placed in a beaker. The upper portion of the beaker is covered with an aluminum foil, and further covered with a plastic paraffin film, and the beaker is placed in a constant-temperature water bath at 37 degrees. A SPME fiber (Sigma-Aldrich 50 / 39 μm DVB / CAR / PDMS, Stableflex 2 cm) is inserted through the aluminum foil into the beaker, and the aroma components of each sample piece are extracted. Then, the SPME fiber taken out of the beaker is immediately measured using a gas chromatograph-mass spectrometer. The values obtained by dividing each mass by the area of the sample piece are calculated. By comparing the calculated values, the sample pieces to which the cooling agent is applied can be determined.

[0100] In addition, in the case where the cooling agent is encapsulated in microcapsules and the microcapsules are formed of water-soluble starch, the cooling agent application region 70 can be visualized by coloring with iodine or the like. In addition, the region where the microcapsules are applied can be observed using an electron microscope or the like, and the cooling agent application region 70 can be determined by measuring the number of microcapsules provided in each region.

[0101] <About Microcapsules>

[0102] In the present specification, the water-disintegrable microcapsule refers to a capsule having a size of 1 to 1,000 μm in diameter and having a space in which a core material (cooling component) is enclosed. The capsule described above is not particularly limited in appearance shape if it can enclose the core material and control the release of the core material, and for example, a spherical shape, an irregular shape, and the like can be given. In addition, the capsule described above can be a single-core type having one space in which the core material is held, a multi-core type having a plurality of spaces in which the core material is held, or a structure in which a core material in the form of a fine particle is dispersed in the inside of a particle, or a matrix type in which a core material in the form of a liquid is contained. As the shape of the space, a spherical shape, an irregular shape, and the like can be given.

[0103] In the microcapsule, the film material (wall material) in which the core material is enclosed (or contained) is changed by a chemical stimulus, and the enclosed (or contained) component is released. As the chemical stimulus, for example, contact of a liquid such as a body fluid (aqueous solution) with the wall material of the microcapsule can be given.

[0104] By imparting these chemical stimuli to the wall material of the microcapsule, disintegration of the wall material can be caused. As a result, the core material in the microcapsule can be caused to start to be released, or in the case where the release is gradually performed before the stimulus, the degree of the release can be promoted. In the case where the microcapsule is water-disintegrable as in the present application, it refers to a property in which the microcapsule is disintegrated to a degree in which the enclosed cooling component is released by contact with a liquid such as sweat (body fluid). Specifically, the case where the wall material of the microcapsule is disintegrated by dissolving in water, and the case where the microcapsule is disintegrated by swelling in water and reduction in strength of the microcapsule resulting from destruction of the microcapsule if the microcapsule is brought into contact with a liquid can be given.

[0105] In the absorbent article 1 of the present embodiment, in the case where the microcapsule is disintegrated by dissolving in water, the water solubility of the microcapsule is preferably in the range of 10 to 300 g, more preferably 20 to 200 g, and further preferably 30 to 100 g, with respect to 100 g of water at 25°C. The water solubility described above is measured according to the Flask Method of OECD Guideline No. 105 except that the test temperature is set to 25°C.

[0106] In addition, the microcapsule is preferably not dissolved in a solvent that is a dispersant for the microcapsule, and is preferably not swollen in a solvent that is a dispersant for the microcapsule. This is from the viewpoint of protecting the enclosed cooling component. As the material of the water-disintegrable microcapsule, for example, a saccharide such as a monosaccharide (for example, glucose), a disaccharide (for example, sucrose), a polysaccharide (for example, dextrin, glucomannan, sodium alginate, water-soluble starch, and the like), a cyclic oligosaccharide (cyclodextrin), gelatin, a water-soluble polymer (for example, polyvinyl alcohol, polyvinyl acetate, and the like), and the like can be given.

[0107] The microcapsule described above is a commercially available product, and for example, INCAP (trademark) marketed by Symrise Co., Ltd., and the like can be given.

[0108] In addition, the above microcapsules can be produced by dissolving a material of the microcapsules in water to form an aqueous solution, mixing the cooling component and the surfactant in the aqueous solution, and performing reduced-pressure drying while spraying the aqueous solution.

[0109] As the solvent of the above microcapsules, a solvent that encloses and holds the cooling component in the microcapsules is preferable. As such a solvent, Japanese Patent Publication No. 2016-13154 can be referred to.

[0110] <Effect of the Cooling Agent Disposition Region 70>

[0111] The diaper 1 of the present embodiment is provided with the cooling agent disposition region 70 in which the cooling agent is disposed in the waist member 20, and thus, when the diaper 1 is worn, the skin of the wearer can be cooled, and the wearer can feel a cool sensation. Further, the cooling agent disposition region 70 of the diaper 1 is disposed so as not to overlap with the main body joint portion 60 (the rear main body joint portion 62) that joins the absorbent main body 10 and the waist member 20 (the rear waist portion 40) when viewed in the thickness direction (see FIG. 1). Figure 4 In other words, the cooling agent non-disposition region 75 in which the cooling agent is not disposed has a portion that overlaps with the main body joint portion 60 when viewed in the thickness direction.

[0112] In the conventional disposable diaper, in the case where the cooling agent or the like, a so-called functional material, is disposed in the waist member, the cooling agent (functional material) is generally applied in as large a range as possible from one side to the other side in the lateral direction (for example, see Patent Document 1). In this case, the main body joint portion of the waist member can overlap with the cooling agent (functional material), and there is a possibility that the joint strength of the main body joint portion can be reduced due to the mixing of the oil contained in the cooling agent (functional material) with the adhesive that forms the main body joint portion. Further, in the portion of the waist member that overlaps with the absorbent main body, the stretchability of the waist member can be easily hindered due to the rigidity of the absorbent main body, the waist member can be difficult to fit to the body of the wearer, and there is a possibility that the cooling agent (functional material) can not act on the skin of the wearer.

[0113] In contrast, in the diaper 1 of the present embodiment, the cooling agent disposition region 70 (and the cooling agent non-disposition region 75) is limited to the portion of the waist member 20 that does not overlap with the absorbent main body 10 when viewed in the thickness direction. Figure 4The adhesive forming the main body joint portion 60 and the cooling agent become difficult to mix at the position described above, and it is difficult to reduce the joint strength of the absorbent main body 10 and the waist member 20. In addition, since the cooling agent arrangement region 70 in the waist member 20 (the rear waist portion 40) is less likely to be affected by the rigidity of the absorbent main body 10, the cooling agent arrangement region 70 is more likely to match the wearer's skin when the diaper 1 is worn. Thus, it is possible to provide an absorbent article in which the cooling agent is easily applied to the wearer's skin without reducing the joint strength of the waist member 20 and the absorbent main body 10.

[0114] In addition, in the diaper 1, the cooling agent arrangement region 70 is arranged so as not to overlap the entire main body joint portion 60 (the rear main body joint portion 62) when viewed in the thickness direction. In other words, the entire main body joint portion 60 (the rear main body joint portion 62) overlaps the cooling agent non-arrangement region 75. Thus, in the diaper 1, the adhesive forming the main body joint portion 60 and the cooling agent are less likely to mix, and it is more likely to suppress the joint strength of the absorbent main body 10 and the waist member 20. Also, since the cooling agent arrangement region 70 is less likely to be affected by the rigidity of the absorbent main body 10, the cooling agent arrangement region 70 (the rear waist portion 40) is more likely to match the wearer's skin, and it is more likely to allow the wearer to feel the cooling effect.

[0115] In addition, according to the above-described configuration, the total weight of the cooling agent provided in the region where the waist member 20 and the absorbent main body 10 do not overlap is greater than the total weight of the cooling agent provided in the region where the waist member 20 and the absorbent main body 10 overlap (the overlapping regions OL30, OL40). Figure 2 In other words, the cooling agent arrangement region 70 is formed so that the proportion of the cooling agent provided at the position overlapping the absorbent main body 10 among the cooling agent provided in the waist member 20 is small. In the case where the cooling agent is arranged in the overlapping regions OL30, OL40 of the waist member 20 overlapping the absorbent main body 10, the cooling agent is less likely to come into contact with the wearer's skin and less likely to exert the cooling effect because the absorbent main body 10 is interposed between the wearer's skin and the cooling agent in the thickness direction when the diaper 1 is worn. Thus, the greater the proportion of the cooling agent provided in the overlapping regions OL30, OL40, the smaller the cooling effect as a whole of the diaper. In contrast, in the diaper 1 of the present embodiment, since the amount of the cooling agent provided in the region where the waist member 20 does not overlap the absorbent main body 10 is greater than the amount of the cooling agent provided in the region overlapping the absorbent main body, the cooling effect is less likely to be hindered by the absorbent main body, and it is more likely to allow the wearer to feel the cooling effect.

[0116] Further, in the diaper 1, the total weight of the cooling agent provided in the rear waist portion 40 is greater than the total weight of the cooling agent provided in the front waist portion 30 among the waist member 20. The body of the person who wears the diaper 1 is generally such that the number of sweat glands in the rear (dorsal) waist is greater than that in the front (ventral) waist, and sweating is easy in the dorsal side.

[0117] Thus, by providing a large amount of the cooling agent in the dorsal side as compared with the ventral side, the wearer can feel a stronger cooling effect in the dorsal side where sweating is easy. In Figure 4 , the cooling agent arrangement region 70 is provided in the rear waist portion 40 but not in the front waist portion 30. Therefore, in the diaper 1, a good cooling sensation can be provided in the dorsal side of the wearer.

[0118] Figure 5 is a view illustrating the positional relationship between the body of the wearer when wearing the diaper 1 and the cooling agent arrangement region 70. As shown in Figure 5 , the cooling agent arrangement region 70 is arranged at a position that abuts against the region from the posterior superior iliac spine to the iliac crest in the dorsal side of the wearer when the diaper 1 is worn. This position is easy to make the waist member 20 adhere to the skin of the wearer due to the protrusion of the iliac crest, and the wearer can easily feel the cooling effect of the cooling agent provided in the cooling agent arrangement region 70. Further, in the case where the wearer sits or maintains a lying posture, the waist member 20 is pressed against the skin at this position and sweating is easy. Thus, by providing the cooling agent arrangement region 70 at the position as shown in Figure 5 , the comfort provided by the cooling agent can be further improved.

[0119] Further, the cooling agent arrangement region 70 is provided in the upper end 10eb of the rear side of the absorbent main body 10 and the upper end 40eu of the rear waist portion 40 in the vertical direction (longitudinal direction) (see Figure 4 ).

[0120] In the diaper 1, the total weight of the cooling agent provided in the rear waist portion 40 is greater than the total weight of the cooling agent provided in the front waist portion 30 among the waist member 20. The body of the person who wears the diaper 1 is generally such that the number of sweat glands in the rear (dorsal) waist is greater than that in the front (ventral) waist, and sweating is easy in the dorsal side.

[0121] Further, as described above, the cool-feeling agent arrangement regions 70 of the present embodiment are provided in a pair on the left and right at a prescribed distance gw70 apart in the left-right direction. In other words, the cool-feeling agent arrangement regions 70 have a discontinuous portion in the central portion in the left-right direction, which becomes a cool-feeling agent non-arrangement region 75 in which no cool-feeling agent is provided. As shown in FIG. 6, the region between the pair of cool-feeling agent arrangement regions 70, 70 is a region in which the waistline member 20 (the rear waistline portion 40) is difficult to closely adhere to the wearer's body due to the depression between the iliac crests on the left and right, and it is difficult to contribute to the cool-feeling effect. That is, even if a discontinuous portion (cool-feeling agent non-arrangement region 75) is provided in the central portion, it is difficult to produce a difference in the cool feeling provided to the wearer compared to the case in which the cool-feeling agent arrangement regions 70 are continuously provided in the left-right direction. Thus, by not providing cool-feeling agent in the central portion, a good cool-feeling effect can be maintained, and the cost of cool-feeling agent arrangement can be reduced. Figure 5

[0122] Further, it is preferable that the discontinuous portion (cool-feeling agent non-arrangement region 75) of the cool-feeling agent arrangement regions 70 in the left-right direction be arranged so as to span the central position in the left-right direction of the diaper 1. The depression between the iliac crests (see FIG. 6) is generally deepest at the central position in the left-right direction. That is, the central position in the left-right direction is the portion in which it is most difficult to contribute to the cool feeling provided to the wearer. Therefore, by providing the discontinuous portion between the cool-feeling agent arrangement regions 70 so as to span the central position in the left-right direction of the diaper 1, the cost can be suppressed, and the cool-feeling agent arrangement regions 70 can be formed efficiently without reducing the cool-feeling effect. Further, by not providing cool-feeling agent in the region in which the gap between the body and the rear waistline portion 40 is greatest between the iliac crests, air easily permeates in the up-down direction, and it is difficult to produce a stuffy feeling when the diaper 1 is worn. Figure 5

[0123] Further, the cool-feeling agent arrangement regions 70 are arranged so as to be separated from the side joint portions 50 by a prescribed distance in the left-right direction. That is, a prescribed gap is provided between the outer end of the cool-feeling agent arrangement regions 70 and the side joint portions 50 in the left-right direction. As described above, in the side joint portions 50, the front waistline portion 30 and the rear waistline portion 40 are joined to each other using a joining means such as fusion or adhesion. In the case in which the cool-feeling agent arrangement regions 70 are provided so as to overlap with such side joint portions 50, the cool-feeling agent is sandwiched between the front waistline portion 30 and the rear waistline portion 40, and there is a possibility that the joining strength of the side joint portions 50 will be reduced due to the influence of the oil contained in the cool-feeling agent. In contrast, in the diaper 1 of the present embodiment, by providing the cool-feeling agent so as not to overlap with the side joint portions 50, it is possible to suppress a reduction in the strength of fusion or adhesion due to the cool-feeling agent. As a result, the front waistline portion 30 and the rear waistline portion 40 are difficult to peel apart, and the diaper 1 easily maintains a brief type shape.

[0124] ​​In addition, the cooling agent application area 70 is set at a predetermined distance from the upper end (40eu) of the waistband member 20 in the vertical direction (see reference). Figure 4 That is, a predetermined interval is provided between the upper end of the cooling agent placement area 70 and the upper end 40eu of the waistband member 20 in the vertical direction. The upper ends 30eu and 40eu of the waistband member 20 are the upper edges (edges) of the diaper 1, which are parts that may come into contact with the wearer's clothing when the diaper 1 is worn. Assuming that the cooling agent is provided at this upper edge, there is a possibility that the cooling agent will adhere to the clothing. In contrast, in the diaper 1 of this embodiment, by providing the cooling agent in a manner that does not overlap with the upper edge of the waistband member 20, it is possible to suppress the cooling agent from adhering to the wearer's clothing when the diaper 1 is worn.

[0125] Furthermore, the cooling agent placement area 70 has a first cooling agent placement area 71 and a second cooling agent placement area 72 that is separated from the first cooling agent placement area 71 by a predetermined distance gl 70 below it. If the wearer moves their body while wearing the diaper 1, the skin side of the waistband member 20 may sometimes be difficult to align with the wearer's skin due to wrinkles or other reasons. That is, wrinkles may form in the waistband member 20, creating a gap between it and the wearer's skin. Furthermore, in areas where such gaps occur, the cooling agent in the waistband member 20 may have difficulty contacting the wearer's skin, potentially resulting in a lack of cooling effect. In contrast, the waistband member 20 of the diaper 1 in this embodiment is provided with two cooling agent placement areas 71 and 72 that are separated vertically. Therefore, even when wrinkles form in the waistband member 20, the likelihood of at least one of the two cooling agent placement areas 71 and 72 being in close contact with the wearer's skin is increased. Therefore, even when the wearer of diaper 1 is moving around, the wearer can reliably feel the cooling effect.

[0126] Preferably, the width H71 of the first cooling agent placement area 71 in the vertical direction is greater than or equal to the width H72 of the second cooling agent placement area 72 in the vertical direction. With this configuration, when the diaper 1 is worn, the probability that the first cooling agent placement area 71 will adhere closely to the wearer's skin in the area above the waist (near the waist opening BH), where sweating is more likely. Therefore, the cooling effect can be effectively enhanced in areas where sweat easily accumulates when the diaper 1 is worn.

[0127] Furthermore, in the diaper 1, in the region between the first cooling agent placement region 71 and the second cooling agent placement region 72 in the vertical direction (the region indicated by gl70), at least one waist elastic member 45 is provided (refer to...). Figure 4As described above, the waist elastic member 45 is bonded to the skin side piece 41 and the non-skin side piece 42 of the rear waist portion 40 in the thickness direction using an adhesive such as a hot melt adhesive. Therefore, in the area between the first cooling agent placement area 71 and the second cooling agent placement area 72 in the vertical direction, a joint is provided that connects the skin side piece 41 and the non-skin side piece 42 in the thickness direction through the waist elastic member 45. Consequently, when wearing the diaper 1, the area between the first cooling agent placement area 71 and the second cooling agent placement area 72 (the area of ​​gl70) is tightly attached in the thickness direction, making it difficult to detach from the wearer's skin. Furthermore, as... Figure 4 Therefore, if the waist elastic member 45 is provided in the area of ​​gl70, the contraction force generated by the waist elastic member 45 relative to that area will be pressed against the wearer's skin. As a result, the first cooling agent placement area 71 and the second cooling agent placement area 72 provided above and below the area of ​​gl70 can easily adhere to the wearer's skin, making it easier for the wearer to feel the cooling effect.

[0128] Furthermore, in the waistband member 20 (back waistband portion 40) of the diaper 1, in the vertical direction, the area overlapping with the cooling agent placement area 70 is designated as the first area R1, and the area adjacent to the lower side of the first area R1 and not overlapping with the cooling agent placement area 70 is designated as the second area R2 (see reference). Figure 4 In this case, it is preferable that the stress in the left-right direction of the waist elastic member 45 in the first region R1 is greater than the stress in the left-right direction of the waist elastic member 45 in the second region. Here, "stress" refers to the force (i.e., contraction force) required for the elastic member to recover from its stretched state to its original state. For example, when the waist elastic member 45 is placed on the back waist portion 40 during the manufacturing process of the diaper 1, the placement can be adjusted in each region by changing the degree of stretching by varying the conveying speed of the waist elastic member 45, or by varying the number of waist elastic members 45. Thus, by increasing the stress of the waist elastic member 45 in the first region R1, which overlaps with the cooling agent placement area 70, the first region R1 in the back waist portion 40 easily adheres to the wearer's skin, making it easier to feel the cooling effect.

[0129] Furthermore, the stress magnitudes in region 1 (R1) and region 2 (R2) can be investigated using a known tensile testing machine. For example, in each region, a sample piece is collected by cutting the rear waist section 40 to a specified length (e.g., 50 mm). This sample piece is held by a pair of clamps of the tensile testing machine with a 10 mm interval in the left-right direction (extension direction). In this state, the sample piece is stretched at a specified tensile speed until the clamps are 15 mm apart. The force required for the sample piece to return to its original shape is measured. By performing this measurement at multiple locations and comparing the results, the stress magnitude can be investigated.

[0130] In addition, Figure 4 In the case of the diaper 1, when viewed in the thickness direction, the cooling agent application area 70 overlaps with the waist elastic member 45. With this configuration, the contractile force generated by the waist elastic member 45 can easily act directly on the cooling agent application area 70. That is, when wearing the diaper 1, the cooling agent application area 70 is pressed against the wearer's skin, enhancing the cooling effect.

[0131] On the other hand, it can also be configured such that, when viewed in the thickness direction, the cooling agent placement area 70 and the waist elastic member 45 do not overlap. Since the waist elastic member 45 is bonded to the waist member 20 via a hot-melt adhesive or the like, if the cooling agent placement area 70 overlaps with the waist elastic member 45, there is a possibility that the oily portion of the cooling agent in the cooling agent placement area 70 mixes with the adhesive adhering to the waist elastic member 45, leading to a decrease in bonding strength. In contrast, by arranging the waist elastic member 45 in a manner that does not overlap with the cooling agent placement area 70, the bonding strength between the waist elastic member 45 and the waist member 20 is less likely to decrease, and positional displacement of the waist elastic member 45 can be suppressed.

[0132] Additionally, in the diaper 1 of this embodiment, such as Figure 3 As shown, a cooling agent placement area 70 is provided between the skin-side sheet 41 and the skin-surface sheet 46 constituting the waistband member 20 (rear waistband portion 40) in the thickness direction. In other words, sheet members such as non-woven fabric are laminated on both the skin-side and non-skin-side of the cooling agent placement area 70. Therefore, the cooling agent (microcapsules) constituting the cooling agent placement area 70 is unlikely to come into direct contact with the wearer's skin, making it easier to suppress skin problems such as rashes. In addition, in this embodiment, only one sheet member (skin-surface sheet 46) is laminated at a position closer to the skin than the cooling agent placement area 70. That is, since the cooling agent is located close to the wearer's skin with one sheet member in between, skin problems can be suppressed, and the wearer can feel a sufficient cooling effect.

[0133] Furthermore, preferably, among the sheet members constituting the waistband member 20 (rear waistband portion 40), the sheet members adjacent to the skin side and non-skin side of the cooling agent placement area 70 are formed of nonwoven fabric containing a meltblown layer. Since the nonwoven fabric containing the meltblown layer is composed of extremely fine fibers, it has a high fiber density, thereby inhibiting the cooling agent (microcapsules) from falling outwards in the thickness direction through the nonwoven fabric. In this embodiment, the skin sheet 46 adjacent to the skin side of the cooling agent placement area 70 and the skin sheet 41 adjacent to the non-skin side of the cooling agent placement area 70 are both made of SMS nonwoven fabric containing a meltblown layer. Therefore, the cooling agent in the cooling agent placement area 70 is less likely to fall outwards in the thickness direction, and the cooling function is less likely to be lost.

[0134] In addition, in the waist member 20 of the diaper 1, a plurality of wrinkles are formed on the surface by the waist elastic members 35, 45 being contracted in the left-right direction (refer to FIG. 6). That is, the waist member 20 has a portion in which the concave-convex is formed in the thickness direction in the natural state or when worn. Figure 1

[0135] Further, it is preferable that the portion in which the concave-convex is formed overlaps at least a part of the cool-feeling agent arrangement region 70 when viewed in the thickness direction. By forming the portion in which the waist member 20 easily abuts against the wearer's body and the portion in which it is difficult to abut due to the concave-convex, the portion in which the cool-feeling agent easily acts and the portion in which it is difficult to act are formed, and thus the cool-feeling function can be exhibited for a long time. Therefore, the comfortableness when the diaper 1 is worn can be easily maintained.

[0136] <Modification Example>

[0137] Figure 6 is a schematic cross-sectional view showing a modification example of the waist member 20 of the diaper 1. This Figure 6 is a view corresponding to Figure 3 , and shows the cross-sectional state in the thickness direction at the central position in the left-right direction of the diaper 1 in the unfolded and elongated state. In this modification example, the skin-facing sheet 36 is not provided in the front waist portion 30. Further, a part of the non-skin-side sheet 32 is folded back at the upper end 30eu of the front waist portion 30 from the non-skin side toward the skin side in the thickness direction and from the upper side toward the lower side in the up-down direction (the longitudinal direction), and a folded-back portion 32f is formed. Similarly, in the back waist portion 40, the skin-facing sheet 46 is not provided, and a part of the non-skin-side sheet 42 is folded back at the upper end 40eu of the back waist portion 40, and a folded-back portion 42f is formed. The folded-back portions 32f, 42f cover the upper ends 10ea, 10eb of the absorbent main body 10 from the skin side, and realize the same function as the skin-facing sheets 36, 46, respectively. That is, in the modification example of Figure 6 , the folded-back portions 32f, 42f correspond to the skin-facing sheets 36, 46.

[0138] In the modification example of Figure 6 , in the back waist portion 40, the cool-feeling agent (microcapsule) is arranged between the skin-side sheet 41 and the folded-back portion 42f, and the cool-feeling agent arrangement region 70 is formed.

[0139] Even in this configuration, the same effect as the above-described cool-feeling agent arrangement region 70 can be realized.

[0140] Next, Figure 7 is a plan view showing a modification example of the cool-feeling agent arrangement region 70. This Figure 7 is a view corresponding to Figure 4 , and shows a plan view of the diaper 1 in the unfolded and elongated state.​

[0141] In Figure 7 a modification of the above, a third cooling agent arrangement region 73 is provided in addition to the first and second cooling agent arrangement regions 71 and 72. The first and second cooling agent arrangement regions 71 and 72 are configured as described above, and the third cooling agent arrangement region 73 is configured as described below. Figure 4

[0142] The third cooling agent arrangement region 73 is a region of the waist member 20 in which the cooling agent (microcapsules) are arranged, like the first cooling agent arrangement region 71. In Figure 7 the modification shown in FIG. 6, a plurality of third cooling agent arrangement regions 73 are arranged along the peripheral portion of the hip cover 40b at positions in the rear waist portion 40 that are lower than the lower end of the side joint 50 in the vertical direction. The first and second cooling agent arrangement regions 71 and 72 are arranged above the waist member 20, and the third cooling agent arrangement region 73 is arranged below the waist member 20. In this way, by arranging the cooling agent in the vicinity of the leg opening LH, the wearer of the diaper 1 can feel the cooling effect even when the wearer is walking or sitting.

[0143] Further, the third cooling agent arrangement region 73 has a portion that overlaps the rear leg elastic member 47 when viewed in the thickness direction. With this configuration, the third cooling agent arrangement region 73 is easily pressed against the wearer's skin by the contraction force of the leg elastic member 47 when the diaper 1 is worn. Therefore, even if the wearer walks or moves the legs while wearing the diaper 1, the hip cover 40b is less likely to roll up, and the cooling effect can be improved along the leg opening LH. Thus, the wearer can be provided with a more pleasant cooling sensation.

[0144] Other Embodiments

[0145] The embodiments of the present application described above are intended to be illustrative only and are not intended to limit the scope of the present application. Various modifications of the embodiments described above can be readily made by those skilled in the art, and the principles taught herein can be applied to other embodiments without departing from the scope of the present application. Accordingly, the present application is not intended to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0146] In the embodiments described above, menthol and the like that act on the TRPM8 channel are exemplified as the cooling agent that forms the cooling agent arrangement region 70, but the present application is not limited to this. Other substances that act on the wearer's skin can also be used.

[0147] ​In the above embodiment, the skin surface sheet 36, 46 is provided on the skin side of the waist member 20, and the fold-back portion 32f, 42f is provided to fold back the non-skin side sheet, but a colored portion (not shown) in which a portion of the sheet member is colored in a cold color such as blue or green can also be provided. By visually recognizing the colored portion colored in the cold color, the wearer can easily associate the cooling sensation of the cooling agent. In addition, the colored portion can be provided so as to overlap the cooling agent arrangement region 70 in the thickness direction, and the presence of the cooling agent can be visually recognized. In this way, the wearer can know at a glance which portion exhibits the cooling effect, and thus can wear the diaper 1 with confidence.

[0148] Explanation of Reference Signs

[0149] 1 diaper (absorbent article),

[0150] 10 absorbent main body,

[0151] 10ea upper end (front side, ventral side), 10eb upper end (rear side, dorsal side),

[0152] 11 absorbent core, 11b core cover sheet, 11c narrowed portion,

[0153] 12 top sheet,

[0154] 13 back sheet, 13a liquid-impermeable sheet, 13b outer cover sheet,

[0155] 20 waist member,

[0156] 30 front waist portion,

[0157] 30eu upper end, 30sw side portion,

[0158] 31 skin side sheet, 32 non-skin side sheet, 32f fold-back portion,

[0159] 35 waist elastic member,

[0160] 36 skin surface sheet,

[0161] 40 rear waist portion, 40b hip cover,

[0162] 40eu upper end, 40sw side portion,

[0163] 41 skin side sheet, 42 non-skin side sheet, 42f fold-back portion,

[0164] 45 waist elastic member,

[0165] 46 skin surface sheet, 47 rear leg elastic member,

[0166] 50 side joint portion,

[0167] 60 main body joint portion,

[0168] 61 front body joint part, 62 rear body joint part,

[0169] 70 cooling agent arrangement region,

[0170] 71 first cooling agent arrangement region, 72 second cooling agent arrangement region,

[0171] 73 third cooling agent arrangement region,

[0172] 75 cooling agent non-arrangement region,

[0173] BH waist opening, LH leg opening,

[0174] CL central position (longitudinal, length direction),

[0175] OL30 front side overlapping region, OL40 rear side overlapping region.

Claims

1. An absorbent article having a liquid-absorbing absorbent body and a waistband member joined to the non-skin side of the absorbent body, wherein at least a portion of the waistband member has a cooling agent placement area with a cooling agent and a cooling agent non-placement area without the cooling agent. Its features are, The aforementioned absorbent article has a main body joint portion in which an adhesive is disposed to join the aforementioned absorbent body and the aforementioned waistband member. When viewed in the thickness direction while the aforementioned absorbent article is unfolded, the main body joint portion overlaps at least partially with the area where the cooling agent is not disposed. The aforementioned waist component has a front waist section and a rear waist section. The aforementioned absorbent materials have intersecting vertical and horizontal directions. The cooling agent is disposed in the above-mentioned vertical direction between the upper end of the rear waist section and the upper end of the rear side of the absorbent body. The aforementioned cooling agent preparation area has a first cooling agent preparation area and a second cooling agent preparation area that moves downward toward the lower side of the aforementioned first cooling agent preparation area in the vertical direction.

2. The absorbent article as claimed in claim 1, characterized in that, The total weight of the cooling agent in the area where the waistband component and the absorbent body do not overlap is greater than the total weight of the cooling agent in the area where the waistband component and the absorbent body overlap.

3. The absorbent article as described in claim 1 or 2, characterized in that, When viewed in the aforementioned thickness direction, the entirety of the aforementioned main body joint overlaps with the aforementioned non-contained area of ​​the cooling agent.

4. The absorbent article as claimed in claim 1, characterized in that, The total weight of the cooling agent located on the rear waist area is greater than the total weight of the cooling agent located on the front waist area.

5. The absorbent article as claimed in claim 4, characterized in that, The cooling agent is positioned at the point where it contacts the area on the back of the wearer, from the posterior superior iliac spine to the iliac crest, when the absorbent material is worn.

6. The absorbent article as claimed in claim 4, characterized in that, The cooling agent formulation area described above has a discontinuous portion in the central part in the left-right direction.

7. The absorbent article as claimed in claim 6, characterized in that, The cooling agent application area has a discontinuous portion that spans the central position of the absorbent article in the left-right direction.

8. The absorbent article as claimed in claim 4, characterized in that, The two ends in the left and right directions have lateral joints that join the front waist section and the rear waist section. In the aforementioned left and right directions, the aforementioned cooling agent placement area is positioned at a predetermined distance from the aforementioned lateral joint.

9. The absorbent article as claimed in claim 4, characterized in that, In the aforementioned vertical direction, the cooling agent application area is positioned at a predetermined distance from the upper end of the waistband component.

10. The absorbent article as claimed in claim 9, characterized in that, The width of the first cooling agent configuration area in the vertical direction is greater than or equal to the width of the second cooling agent configuration area in the vertical direction.

11. The absorbent article as claimed in claim 9 or 10, characterized in that, In the above-mentioned vertical direction, between the above-mentioned first cooling agent preparation area and the above-mentioned second cooling agent preparation area, there is a joint portion that joins the skin side piece and non-skin side piece of the above-mentioned rear waist section in the above-mentioned thickness direction.

12. The absorbent article as claimed in claim 1, characterized in that, The aforementioned waist member has a waist elastic member that can stretch and contract in the aforementioned left and right directions. In the aforementioned waistband component, the area overlapping with the cooling agent placement area in the vertical direction is designated as the first area, and the area adjacent to the lower side of the first area and not overlapping with the cooling agent placement area in the vertical direction is designated as the second area. The stress in the left-right direction of the waist elastic member in the first region is greater than the stress in the left-right direction of the waist elastic member in the second region.

13. The absorbent article as claimed in claim 12, characterized in that, When viewed in the aforementioned thickness direction, the aforementioned absorbent article has a portion where the aforementioned cooling agent configuration area overlaps with the aforementioned waist elastic member.

14. The absorbent article as claimed in claim 12, characterized in that, When viewed in the aforementioned thickness direction, the aforementioned absorbent article does not have a portion overlapping the aforementioned cooling agent configuration area with the aforementioned waist elastic member.

15. The absorbent article as claimed in claim 1, characterized in that, The aforementioned waistband component has a skin-side panel, a non-skin-side panel, and a skin-surface panel layered on the skin-side of the aforementioned skin-side panel. The cooling agent is disposed between the skin side plate and the skin surface plate.

16. The absorbent article as claimed in claim 1, characterized in that, The sheet components adjacent to the skin side and non-skin side of the area where the cooling agent is applied are nonwoven fabrics containing meltblown layers.

17. The absorbent article as claimed in claim 1, characterized in that, The two ends in the left and right directions have lateral joints that join the front waist section and the rear waist section. In the above-mentioned vertical direction, a cooling agent preparation area is provided at a position lower than the lower end of the above-mentioned lateral joint.

18. The absorbent article as claimed in claim 17, characterized in that, The aforementioned absorbent article has a rear leg elastic member along the lower edge of the rear waist portion. When viewed in the aforementioned thickness direction, the aforementioned absorbent article has a portion that overlaps with the aforementioned rear leg circumference elastic member and the aforementioned cooling agent placement area.

19. The absorbent article as claimed in claim 1, characterized in that, The aforementioned waistband component has a portion with irregularities formed in the thickness direction when the aforementioned absorbent article is worn or in its natural state. When viewed in the aforementioned thickness direction, the aforementioned absorbent article has a portion where the aforementioned uneven portion overlaps with the aforementioned cooling agent placement area.

Images