Absorbent articles

Abstract

An absorbent article (1) having a first absorber (10) provided with a first absorbent core (11), and a second absorber that is provided with a second absorbent core (21) and that is positioned further toward a non-skin side than the first absorber (10), an adhesive part (30) being provided on the non-skin-side surface of the second absorber (20), wherein the absorbent article (1) has: a joining section (50), which is provided in a width-direction central section and in which the first absorber (10) and the second absorber (20) are joined; and a pair of separation sections (60), which are provided at two width-direction ends and in which the first absorber (10) and the second absorber (20) are separated.

Description

[Technical field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Patent Document 1 discloses a sanitary napkin that is provided with gather flaps on the back side of the absorbent element, extending outward in the width direction from both side edges of the absorbent element and standing up toward the use side in order to prevent side leakage of excreted liquid. In this sanitary napkin, the standing up of the gather flaps also causes both sides of the absorbent element in the width direction to stand up. Therefore, both sides of the absorbent element fit the wearer's body, preventing side leakage and improving the absorbency of the absorbent element. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-70343 A Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned absorbent articles such as sanitary napkins and light incontinence pads are generally attached to underwear when used. Therefore, there has been a problem that the part of the absorbent article that is not fixed to the underwear moves in accordance with the movement of the wearer's body relative to the part of the absorbent article that is fixed to the underwear, causing the absorbent article to twist (deform). When the absorbent article twists, the absorbing surface of the absorbent article becomes smaller, etc., and excreted liquid becomes more likely to leak.

[0005] The present invention has been made in consideration of the above problems, and has an object to prevent twisting of an absorbent article when it is worn, thereby suppressing leakage of excreted liquid. [Means for solving the problem]

[0006] The main invention to achieve the above object is: A longitudinal direction, a width direction, and a thickness direction, a first absorbent body having a first absorbent core; a second absorbent body provided with a second absorbent core and disposed closer to the skin than the first absorbent body in the thickness direction; An absorbent article having an adhesive portion provided on a non-skin side of the second absorbent body, At least at a predetermined position in the longitudinal direction, a joining portion provided in a center portion in the width direction, where the first absorbent body and the second absorbent body are joined; a pair of separation sections provided at both ends in the width direction, separating the first absorbent body and the second absorbent body; Has A pair of elastic members that stretch in the longitudinal direction are disposed in at least a portion of the pair of spaced apart portions of the first absorbent body, The joint is A second narrow portion having a certain length in the width direction is provided in the center portion in the longitudinal direction, a pair of second wide portions at both ends in the longitudinal direction, the pair of second wide portions being longer in the width direction than the second narrow portions; In the longitudinal direction, the second wide portion is disposed outside the stretchable portion of the elastic member. An absorbent article characterized by: Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings. Effect of the Invention

[0007] According to the present invention, it is possible to prevent twisting of the absorbent article when it is worn, and thus to suppress leakage of excreted liquid. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a plan view of the light incontinence pad 1 in a stretched state, as viewed from the skin side. [Diagram 2] FIG. 2 is a plan view of the pad 1 in a stretched state, as viewed from the non-skin side. [Diagram 3] 2 is a schematic cross-sectional view of the pad 1 taken along line II in FIG. [Figure 4] 3 is an explanatory diagram of a joint portion 50 and a spaced portion 60. FIG. [Diagram 5] FIG. 13 is a diagram showing the joint 50 and the anti-slip portion 30 overlapping in the thickness direction. [Figure 6]FIG. 2 is a diagram illustrating an individual package 70 of the pad 1 in an unfolded state. [Figure 7] 2 is a schematic cross-sectional view illustrating an end portion of the pad 1 in the width direction. FIG. [Figure 8] 1 is a schematic cross-sectional view of the pad 1 showing a spaced portion 60 of a standing first absorbent body 10. FIG. [Figure 9] FIG. 2 is a diagram illustrating the arrangement of a first absorbent core 11 and first compressed sections 41. [Figure 10] 10A and 10B are schematic cross-sectional views of the longitudinal center portion of a pad 70 according to a second embodiment. [Figure 11] 11 is a schematic cross-sectional view of a longitudinal end portion of a pad 90 according to a third embodiment. FIG. [Figure 12] 1 is a schematic plan view of a pad 90 showing the arrangement of anti-slip portions 30 and fixing portions 91. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] At least the following points will become apparent from the description of this specification and the accompanying drawings. The absorbent article has a longitudinal direction, a width direction and a thickness direction, and comprises a first absorbent body having a first absorbent core, and a second absorbent body having a second absorbent core and arranged on the non-skin side of the first absorbent body in the thickness direction, and an adhesive portion is provided on the non-skin side of the second absorbent body, characterized in that at least at a predetermined position in the longitudinal direction, the absorbent article has a joint portion provided in the center of the width direction where the first absorbent body and the second absorbent body are joined, and a pair of separation portions provided at both ends in the width direction where the first absorbent body and the second absorbent body are separated.

[0010] According to such an absorbent article, the separated portion of the first absorbent body can move freely with the movement of the wearer's legs relative to the second absorbent body fixed to the underwear, making the absorbent article less likely to twist. As a result, the size of the absorption surface of the absorbent article can be secured, and leakage of excreted liquid can be suppressed.

[0011] The absorbent article is characterized in that at least a part of the adhesive portion is disposed outside the inner end of the spaced portion in the width direction.

[0012] In such an absorbent article, the separated portion of the second absorbent body is likely to return to its original position due to the restoring force of the underwear, and therefore the second absorbent body is likely to maintain its widthwise expanded state and is less likely to twist.

[0013] The absorbent article is characterized in that, when the absorbent article is viewed in a plan view in the thickness direction, the adhesive portion has a portion that overlaps with the spaced portion.

[0014] In such an absorbent article, the separated portion of the second absorbent body is likely to return to its original position due to the restoring force of the underwear, and therefore the second absorbent body is likely to maintain its widthwise expanded state and is less likely to twist.

[0015] Such an absorbent article is characterized in that the adhesive portion has a narrow portion in the center in the longitudinal direction, the length in the width direction being a predetermined length, and has a pair of wide portions at both ends in the longitudinal direction, the length in the width direction being longer than that of the narrow portion and having a portion extending outward in the width direction further than the outer ends in the width direction of the narrow portion.

[0016] According to such an absorbent article, the absorbent article is not fixed to the vicinity of the edge of the underwear at the longitudinal center of the absorbent article that abuts against the crotch part of the wearer, so that the wearer can easily close his / her legs. Meanwhile, at both longitudinal ends of the absorbent article, the second absorbent body is fixed to the underwear widely in the width direction, so that the second absorbent body tends to maintain a state in which it is spread in the width direction and is less likely to twist.

[0017] Such an absorbent article is characterized in that a pair of elastic members that stretch in the longitudinal direction are arranged at both ends of the first absorbent body in the width direction, and the end on one side of the longitudinal direction of the stretchable portion of the elastic member is located further outward in the longitudinal direction than the end on the longitudinal center side of the wide portion on the one side of the longitudinal direction, and the end on the other side of the longitudinal direction of the stretchable portion of the elastic member is located further outward in the longitudinal direction than the end on the longitudinal center side of the wide portion on the other side of the longitudinal direction.

[0018] In such an absorbent article, the elastic members increase the rigidity of both ends in the width direction of the first absorbent body, making the first absorbent body less likely to lose its shape or twist. Also, in the center part in the longitudinal direction of the absorbent article, it is more difficult to maintain the expanded state in the width direction compared to the both ends, but the elastic members are arranged over a long range in the longitudinal direction, allowing the separated parts of the first absorbent body to stand up, thereby suppressing leakage of excreted liquid.

[0019] The absorbent article is characterized in that it has a folded portion for packaging along the width direction, and the folded portion is provided between the pair of wide portions in the longitudinal direction.

[0020] In such an absorbent article, since the wide portion of the adhesive portion does not develop a crease, both longitudinal ends of the second absorbent body are firmly fixed to the underwear by the wide portion. Therefore, the second absorbent body is likely to maintain its widthwise expanded state and is less likely to twist.

[0021] The absorbent article is characterized in that the first absorbent core has a lower basis weight of pulp fibers than the second absorbent core.

[0022] In such an absorbent article, the thickness of the first absorbent core is reduced, so that the first absorbent body is less likely to twist.

[0023] The absorbent article is characterized in that the first absorbent core does not contain the pulp fibers and contains a highly absorbent polymer.

[0024] In such an absorbent article, the thickness of the first absorbent core is reduced, so that the first absorbent body is less likely to twist.

[0025] The absorbent article is characterized in that the first absorbent body has heat-fusible fibers and does not have cellulosic fibers.

[0026] According to such an absorbent article, the first absorbent body is less likely to lose its shape and become twisted even after excretion.

[0027] Such an absorbent article is characterized in that nonwoven fabric is arranged at both ends of the first absorbent body in the width direction, and the first absorbent core is not arranged.

[0028] According to such an absorbent article, even after excretion, both ends in the width direction of the first absorbent body are not swollen by the absorbent core, so the first absorbent body is less likely to lose its shape or become twisted.In addition, the wearer feels a gentler sensation when closing their legs.

[0029] Such an absorbent article is characterized in that in areas at both ends of the width of the first absorbent body where the first absorbent core is not positioned, nonwoven fabrics are joined together.

[0030] In such an absorbent article, the rigidity of both ends in the width direction of the first absorbent body is increased by bonding the nonwoven fabrics together, so that the first absorbent body is less likely to lose its shape or become twisted.

[0031] Such an absorbent article is characterized in that a pair of elastic members that stretch in the longitudinal direction are arranged at both ends of the first absorbent body in the width direction, where the nonwoven fabrics are joined together.

[0032] In such an absorbent article, the elastic members increase the rigidity of both ends in the width direction of the first absorbent body, so that the first absorbent body is less likely to lose its shape and become twisted.

[0033] Such an absorbent article is characterized in that a pair of elastic members that stretch in the longitudinal direction are arranged in at least a portion of the longitudinal direction of the pair of spaced apart portions of the first absorbent body.

[0034] In such an absorbent article, the elastic member improves the standing property of the separated portion of the first absorbent body, thereby preventing side leakage of excreted liquid. Also, the slope of the standing separated portion allows excreted liquid to be collected in the center in the width direction.

[0035] The absorbent article is characterized in that the spaced portion has a hydrophobic portion on the surface closest to the skin.

[0036] In such an absorbent article, excreted liquid is less likely to be absorbed by the spaced apart portions of the upright first absorbent body, and the excreted liquid is more likely to flow down the slopes of the upright spaced apart portions, and is more likely to collect in the centre of the width.

[0037] Such an absorbent article is characterized in that the joint has a second narrow portion at the center in the longitudinal direction, the second narrow portion having a certain length in the width direction, and a pair of second wide portions at both ends in the longitudinal direction, the second wide portions having a longer length in the width direction than the second narrow portions, and the second wide portions are positioned outboard in the longitudinal direction relative to the stretchable portion of the elastic member.

[0038] Such an absorbent article can prevent the rising of the separated portion in the longitudinal center of the absorbent article from being hindered by the wide portion (second wide portion) of the joint. Therefore, in the longitudinal center of the absorbent article where the wearer's crotch part comes into contact and excreted liquid is excreted, the separated portion of the first absorbent body is more likely to rise, thereby preventing leakage of excreted liquid.

[0039] Such an absorbent article is characterized in that, when the absorbent article is viewed in a plane in the thickness direction, the second absorbent core is not positioned in the portion of the second absorbent body that overlaps with the widthwise end of the second wide portion.

[0040] In such an absorbent article, the rigidity of the widthwise end portion of the second absorbent body that is joined to the first absorbent body in a wide manner is reduced, and the portion of the second absorbent body can bend due to contraction in the longitudinal direction of the elastic member, thereby preventing the second absorbent body from hindering the standing of the separated portion of the first absorbent body, and thus preventing leakage of excreted liquid.

[0041] Such an absorbent article is characterized in that at the widthwise end portions of the separation portion, the first absorbent core is not positioned and hydrophobic nonwoven fabrics are joined together.

[0042] In such an absorbent article, the separated portion is more likely to stand up than when the first absorbent core is disposed up to the end of the separated portion in the width direction. In addition, the separated portion is more likely to maintain its upright shape without swelling even after excretion, which can suppress leakage of excreted liquid. In addition, by bonding the hydrophobic nonwoven fabrics together, the hydrophobicity of the separated portion is improved, and excreted liquid is more likely to collect in the center in the width direction.

[0043] Such an absorbent article has a folded portion at the time of packaging along the width direction, and when the absorbent article is viewed in a plane in the thickness direction, the stretchable portion of the elastic member and the folded portion overlap.

[0044] In such an absorbent article, the elastic member extends in the longitudinal direction to both longitudinal ends of the absorbent article that stand up due to the folds in the folds, making the elastic member more likely to contract, improving the stand-up ability of the separated portion of the first absorbent body and suppressing leakage of excretory liquid.

[0045] Such an absorbent article is characterized in that at least a portion of the absorbent article in the thickness direction is a groove portion recessed in the thickness direction, and the groove portion having a length in the longitudinal direction is located more inward in the width direction than the separation portion.

[0046] According to such an absorbent article, excreted liquid discharged in the widthwise central portion can be diffused in the longitudinal direction along the grooves, thereby preventing the excreted liquid from overflowing and leaking from the absorbent article.

[0047] The absorbent article is characterized in that the groove portion is a portion of the absorbent article that is recessed in the thickness direction from the skin side of the absorbent article, and the skin side of the groove portion is non-hydrophobic.

[0048] According to such an absorbent article, the excreted liquid that flows into the grooves is absorbed into the inside of the absorbent article while being diffused in the longitudinal direction, and thus it is possible to prevent the excreted liquid from overflowing and leaking from the absorbent article.

[0049] The absorbent article is characterized in that the groove portion is a compressed portion provided from the first absorbent body to the second absorbent body in the thickness direction.

[0050] In such an absorbent article, the compressed portion facilitates transfer of excrement from the first absorbent body to the second absorbent body, thereby preventing the first absorbent body from being unable to absorb all of the excrement, causing the excrement to overflow and leak from the absorbent article.

[0051] Such an absorbent article is characterized in that the groove portion is provided in the first absorbent core, the first absorbent core has a superabsorbent polymer, and in the first absorbent core, the groove portion has a lower basis weight of the superabsorbent polymer than the adjacent portion of the groove portion.

[0052] In such an absorbent article, excreted liquid is easily transferred from the grooves of the first absorbent core to the second absorbent body, which prevents the first absorbent body from being able to absorb all the excreted liquid and causes the excreted liquid to overflow and leak from the absorbent article.

[0053] The absorbent article is characterized in that the second absorbent body has a larger maximum absorption amount of excrement than the first absorbent body.

[0054] In such an absorbent article, the excreted liquid that has migrated from the first absorbent body to the second absorbent body is absorbed and held by the second absorbent body, and the return of the excreted liquid to the first absorbent body can be suppressed, thereby preventing the first absorbent body from being unable to absorb all the excreted liquid, and causing the excreted liquid to overflow and leak from the absorbent article.

[0055] The absorbent article is characterized in that the second absorbent core comprises pulp fibers and a superabsorbent polymer.

[0056] In such an absorbent article, the pulp fibers facilitate the absorption of excreted liquid into the second absorbent body, preventing the excreted liquid from overflowing and leaking from the absorbent article, and the highly absorbent polymer absorbs and retains the excreted liquid that has migrated to the second absorbent body, preventing the excreted liquid from returning to the first absorbent body.

[0057] The absorbent article is characterized in that the second absorbent core comprises pulp fibers and does not comprise a superabsorbent polymer.

[0058] In such an absorbent article, the pulp fibers facilitate the absorption of excreted liquid into the second absorbent body, preventing the excreted liquid from overflowing and leaking from the absorbent article. Furthermore, the absence of a superabsorbent polymer facilitates the excreted liquid to be diffused in the planar direction of the second absorbent core.

[0059] An absorbent article having an absorbent body having a longitudinal direction, a width direction and a thickness direction, the absorbent body comprising an absorbent core, the absorbent body comprising a top sheet arranged closer to the skin than the absorbent core, side sheets arranged at both ends of the absorbent body in the width direction, and a pair of elastic members fixed to the side sheets at both ends of the absorbent body in the width direction and stretching in the longitudinal direction, the value obtained by dividing the mass of the superabsorbent polymer contained in the absorbent core by the mass of the absorbent core is greater than the value obtained by dividing the mass of the pulp fibers contained in the absorbent core by the mass of the absorbent core, the side sheets having at least one of fused fibers, entangled fibers and fibers bonded by a bonding material, and the side sheets are folded back inward in the width direction from the non-skin side of the absorbent core to cover both ends of the width direction of the absorbent core and be located on both ends of the width direction of the skin side of the top sheet.

[0060] According to such an absorbent article, the mass ratio of pulp fiber is low, so the absorbent body is less likely to lose its shape and twist. On the other hand, the mass ratio of superabsorbent polymer is high, so the absorption speed is fast and leakage is less likely. In addition, the seamless side sheets cover both ends of the absorbent core in the width direction, so excreted liquid is less likely to seep out. In addition, the elastic member makes it easy for both ends of the absorbent body in the width direction to stand up against the skin, so side leakage can be suppressed. In addition, since the fibers constituting the side sheets have fusion points and are less likely to come apart, even if force is applied to the absorbent body due to the wearer's movement or the absorbent core absorbs excreted liquid, the side sheets tend to maintain the shape of the absorbent body, are less likely to twist, and both ends of the absorbent body in the width direction tend to stand up.

[0061] an absorbent article having a longitudinal direction, a width direction and a thickness direction, and an absorbent body comprising an absorbent core, the absorbent core comprising a superabsorbent polymer and having an adhesive portion on a non-skin side of the absorbent article, the absorbent body comprising a side sheet arranged at both ends of the width direction of the absorbent body, and a pair of elastic members fixed to the side sheet at both ends of the width direction of the absorbent body, the side sheet having at least one of fused fibers, entangled fibers and fibers joined by a bonding material, both ends of the longitudinal direction of the side sheet are fixed to any part of the absorbent article by a pair of fixing parts, a part of the side sheet between the pair of fixing parts in the longitudinal direction can stand up towards the skin side by contraction of the elastic members, and the fixing part has a part overlapping with the adhesive portion when the absorbent article is viewed in a plane in the thickness direction.

[0062] According to such an absorbent article, the high absorbent polymer provides a high absorption rate and is less likely to leak. In addition, the elastic member causes the side sheet to rise toward the skin, thereby suppressing side leakage. In addition, the adhesive portion fixes the side sheet to the underwear at the portion where the side sheet starts to rise in the longitudinal direction, so that the side sheet is stable in the rising state. On the other hand, the adhesive portion is provided at a position overlapping the fixing portion and is located on the outside in the width direction, so that the wide shape of the absorbent article is easily maintained by the restoring force of the underwear. In addition, since the fibers constituting the side sheet have fusion points and are not easily unraveled, even if the absorbent body is subjected to force due to the wearer's movement or the absorbent core absorbs excreted liquid, the side sheet easily maintains the shape of the absorbent body, is less likely to twist, and the side sheet is easily maintained in the rising state.

[0063] The absorbent article is characterized in that a nonwoven fabric is arranged at both ends of the absorbent body in the width direction, and the absorbent core is not arranged.

[0064] According to such an absorbent article, even after excretion, both ends in the width direction of the absorbent body are not swollen by the absorbent core, so the absorbent body is less likely to lose its shape or become twisted.In addition, the absorbent article feels soft when the wearer closes his / her legs.

[0065] The absorbent article is characterized in that in the portions at both ends of the absorbent body in the width direction where the absorbent core is not disposed, the nonwoven fabrics are joined together.

[0066] In such an absorbent article, the rigidity of both widthwise ends of the absorbent body is increased by bonding the nonwoven fabrics together, so that the absorbent body is less likely to lose its shape or become twisted.

[0067] The absorbent article is characterized in that the elastic members are disposed at both ends of the absorbent body in the width direction, at portions where the nonwoven fabrics are joined to each other.

[0068] In such an absorbent article, the elastic members increase the rigidity of both ends of the absorbent body in the width direction, so that the absorbent body is less likely to lose its shape and become twisted.

[0069] The absorbent article further comprises a second absorbent core disposed on the non-skin side of the absorbent core in the thickness direction.

[0070] Such an absorbent article has improved absorption performance and can suppress rewetting of excreted liquid.

[0071] Hereinafter, a light incontinence pad will be described as an example of the absorbent article according to the present embodiment. However, the absorbent article is not limited to the light incontinence pad, and other absorbent articles include, for example, sanitary napkins and panty liners.

[0072] ===First embodiment=== ===Basic composition of light incontinence pad 1=== Fig. 1 is a plan view of a light incontinence pad 1 (hereinafter also referred to as "pad") in a stretched state, as viewed from the skin side. Fig. 2 is a plan view of pad 1 in a stretched state, as viewed from the non-skin side. Fig. 3 is a schematic cross-sectional view of pad 1 taken along line II in Fig. 1. The stretched state of pad 1 refers to a state in which pad 1 is stretched without wrinkles. Specifically, pad 1 is stretched until the dimensions of each material constituting pad 1 become equal to or close to the dimensions of that material alone, without being affected by the elastic members of pad 1.

[0073] The pad 1 has a longitudinal direction, a width direction, and a thickness direction. In the thickness direction, the side that contacts the wearer's skin is the skin side, and the opposite side is the non-skin side. The pad 1 of this embodiment is configured symmetrically in the longitudinal direction. Therefore, one side of the pad 1 in the longitudinal direction may be the wearer's ventral side or the wearer's back side.

[0074] As shown in FIG. 3, the pad 1 has a first absorbent body 10 having a first absorbent core 11, and a second absorbent body 20 having a second absorbent core 21 and positioned closer to the non-skin side than the first absorbent body 10 in the thickness direction.

[0075] The first absorbent body 10 has a first absorbent core 11, a first skin side core wrap 12 covering the skin side of the first absorbent core 11, a first non-skin side core wrap 13 covering the non-skin side of the first absorbent core 11, a top sheet 14 arranged closer to the skin than the first skin side core wrap 12, an intermediate sheet 15 arranged between the top sheet 14 and the first skin side core wrap 12, and a pair of first side sheets 16 arranged at both ends in the width direction of the first absorbent body 10. Each material is joined with adhesives A1 to A7 such as hot melt.

[0076] The top sheet 14 and the intermediate sheet 15 are liquid-permeable sheets. For the liquid-permeable sheets, nonwoven fabrics (such as air-through nonwoven fabrics and spunbond nonwoven fabrics) and synthetic resin films having through holes can be used.

[0077] The first absorbent core 11 is a superabsorbent polymer (hereinafter also referred to as "SAP"). The first skin side core wrap 12 and the first non-skin side core wrap 13 are liquid permeable sheets, and nonwoven fabrics or the like can be used. In the following description, the first absorbent core 11, the first skin side core wrap 12, and the first non-skin side core wrap 13 are collectively referred to as the first core portions 11-13.

[0078] Both widthwise ends of the first skin side core wrap 12 are folded back onto a part of the non-skin side of the first non-skin side core wrap 13 so as to roll in both widthwise edges of the first absorbent core 11 and the first non-skin side core wrap 13. A fragrance 17 is disposed between the folded-back parts of the first skin side core wrap 12 and the first non-skin side core wrap 13. The fragrance 17 can mask the odor of excreted fluid and ease the wearer's feelings of anxiety or depression when using the pad 1.

[0079] The first side sheet 16 is a liquid-impermeable sheet, and in this embodiment, is a nonwoven fabric containing hydrophobic fibers (for example, an air-through nonwoven fabric or a spunbond nonwoven fabric). One end of the first side sheet 16 is fixed to both widthwise ends of the non-skin side of the first core portions 11-13 by adhesive A6 (specifically, fixed to the folded-back portion of the first skin side core wrap 12). From the fixed portion, the first side sheet 16 is folded back toward the skin side of the top sheet 14 so as to roll in both widthwise edges of the first core portions 11-13, the top sheet 14, and the intermediate sheet 15. The other end of the first side sheet 16 is fixed to both widthwise ends of the skin side of the top sheet 14 by adhesive A7.

[0080] Also, a single rubber thread 18 (elastic member) that stretches in the longitudinal direction is disposed on the edge in the width direction of the first side sheet 16. That is, the rubber thread 18 is fixed to the first side sheet 16 in a state of being stretched in the longitudinal direction. Note that a sheet-like elastic member such as a stretchable film may be disposed instead of the rubber thread 18 (thread-like elastic member). The number of rubber thread 18 is not limited to one, and may be multiple. Also, the drawings show only the stretchable portion (18a-18b in FIG. 2) of the rubber thread 18 that exhibits stretchability.

[0081] The second absorbent body 20 has a second absorbent core 21, a second skin side core wrap 22 covering the skin side of the second absorbent core 21, a second non-skin side core wrap 23 covering the non-skin side of the second absorbent core 21, a back sheet 24 arranged on the non-skin side of the second non-skin side core wrap 23, and a pair of second side sheets 25 extending outward in the width direction from both widthwise ends of the skin side of the second skin side core wrap 22. Each material is joined with adhesives A8 to A11 such as hot melt.

[0082] The second absorbent core 21 is formed by molding liquid absorbent fibers such as pulp fibers and cellulosic absorbent fibers into a predetermined shape. The liquid absorbent fibers may or may not contain superabsorbent polymers (SAP). The second skin side core wrap 22 and the second non-skin side core wrap 23 are liquid permeable sheets, and may be, for example, tissue or nonwoven fabric. Both ends in the width direction of the second skin side core wrap 22 are folded back to the positions of both ends in the width direction of the non-skin side of the second absorbent core 21 so as to roll up the second absorbent core 21. The second non-skin side core wrap 23 is disposed so as to cover the non-skin side of the second absorbent core 21 from the non-skin side of the folded-back portion of the second skin side core wrap 22. In the following description, the second absorbent core 21, the second skin side core wrap 22, and the second non-skin side core wrap 23 are collectively referred to as second core portions 21-23.

[0083] The back sheet 24 is a liquid-impermeable sheet. The liquid-impermeable sheet may be a synthetic resin film such as polyethylene (PE) or polypropylene (PP), or a composite sheet of a synthetic resin film and a nonwoven fabric. The second side sheet 25 is a liquid-impermeable sheet, similar to the first side sheet 16, and may be a nonwoven fabric containing hydrophobic fibers. The back sheet 24 and the second side sheet 25 extend outward in the width direction beyond the first absorbent body 10 and the second core portions 21-23, and are joined to each other at the portions extending from the second core portions 21-23.

[0084] The first absorbent body 10 and the second absorbent body 20 are joined by an adhesive A12 arranged on the skin side of the second side sheet 25, and an adhesive A8 arranged between the second side sheet 25 and the second core portions 21-23 in the thickness direction. Specifically, the first side sheet 16 and the second side sheet 25 are joined by the adhesive A12. Furthermore, between a pair of second side sheets 25 arranged with a gap in the width direction, the first core portions 11-13 and the second core portions 21-23 are joined by the adhesive A8.

[0085] 1, the first core portions 11-13 have a rectangular planar shape. The second core portions 21-23 have a substantially rectangular planar shape with both longitudinal ends curved outwardly in the width direction. The first core portions 11-13 are slightly longer in the width direction and shorter in the longitudinal direction than the second core portions 21-23.

[0086] The non-skin side of the second absorbent body 20 (i.e., the non-skin side of the back sheet 24) is provided with a slip prevention portion 30 (adhesive portion) applied with a hot melt adhesive or the like. The slip prevention portion 30 is attached to the skin side of the wearer's underwear, and the pad 1 is used in a state where it is fixed to the underwear. As shown in Fig. 2, the slip prevention portion 30 has a pair of central adhesive portions 31 spaced apart in the width direction, and four side adhesive portions 32 arranged outboard of the central adhesive portion 31 in the width direction.

[0087] The central adhesive portion 31 is rectangular in shape with long sides in the longitudinal direction, and is continuously arranged in the longitudinal direction from one end to the other end of the pad 1 in the longitudinal direction. The side adhesive portions 32 are rectangular in shape with long sides in the longitudinal direction, and are shorter in the longitudinal direction than the central adhesive portion 31. Two of the four side adhesive portions 32 are arranged at one end of the pad 1 in the longitudinal direction, and the other two side adhesive portions 32 are arranged at the other end of the pad 1 in the longitudinal direction. In other words, on the outer side of the central adhesive portion 31 in the width direction, a pair of side adhesive portions 32 are arranged at an interval in the longitudinal direction.

[0088] The pad 1 has compressed portions 40 that are recessed in the thickness direction of the pad 1. The compressed portions 40 of the present embodiment are compressed in the thickness direction from the topsheet 14 of the first absorbent body 10 to the second core portions 21-23 from the skin side.

[0089] In the compressed portion 40, the thickness of the pad 1 is thinner than the surrounding area, and the fiber density of the pad 1 is higher. These comparisons may be made by known methods. The thickness of the pad 1 can be compared by visual comparison, or by using a dial thickness gauge ID-C1012C manufactured by Mitutoyo Corporation or an equivalent device to measure the thickness of the target area at, for example, 3.0 gf / cm 2 For example, the density of the pad 1 can be compared based on an image of a cross section of the pad 1 cut in the thickness direction, which is enlarged using an electron microscope or the like.

[0090] The compressed portion 40 has a pair of first compressed portions 41 extending in the longitudinal direction and spaced apart in the width direction, and a pair of second compressed portions 42 extending in the width direction between the pair of first compressed portions 41 and spaced apart in the longitudinal direction. The first compressed portion 41 is curved inwardly in the width direction in the longitudinal center of the pad 1 (i.e., in the region that abuts against the crotch of the wearer). The second compressed portion 42 is curved inwardly in the longitudinal direction. However, the shape, number, and arrangement of the compressed portions 40 illustrated in FIG. 1 are merely examples, and are not limited thereto. The linear compressed portions 40 (41, 42) extending in the longitudinal direction and the width direction may be groove-shaped compressed portions in which the pad 1 is continuously recessed in each direction, or may be compressed portions in which a plurality of dot-shaped compressed portions are arranged in a line.

[0091] The basic configuration of the pad 1 has been described above, but the above configuration of the pad 1 is merely an example and is not limited thereto. For example, the planar shape of the pad 1 may be asymmetric in the longitudinal direction, and the pad 1 may not have the intermediate sheet 15 or the fragrance 17. In addition, the first absorbent core 11 and the second absorbent core 21 may each be wrapped in a single core wrap.

[0092] ===About suppressing twisting of Pad 1=== Fig. 4 is an explanatory diagram of the joint 50 and the separation portion 60. Fig. 5 is a diagram showing the joint 50 and the slip prevention portion 30 overlapping in the thickness direction. In Fig. 5, the outline of the joint 50 is shown by a thick line. Fig. 6 is a diagram explaining an individually wrapped body 70 of the pad 1 in an unfolded state. Fig. 7 is a schematic cross-sectional view explaining an end portion in the width direction of the pad 1. Fig. 8 is a schematic cross-sectional view of the pad 1 showing the separation portion 60 of the standing first absorbent body 10.

[0093] The pad 1 has a first absorbent body 10 and a second absorbent body 20, but both ends in the width direction of the first absorbent body 10 are not joined to the second absorbent body 20. In other words, the pad 1 has a joining portion 50 where the first absorbent body 10 and the second absorbent body 20 are joined in the center in the width direction, and has a pair of separation portions 60 where the first absorbent body 10 and the second absorbent body 20 are separated at both ends in the width direction.

[0094] Specifically, as shown in Fig. 3, the first absorbent body 10 and the second absorbent body 20 are joined by an adhesive A12 between the first side sheet 16 and the second side sheet 25, and an adhesive A8 between the first core portions 11-13 and the second core portions 21-23. Therefore, as shown in Fig. 4, the region inside the outer end of the adhesive A12 in the width direction is defined as a joint 50. The joint 50 does not necessarily have to be provided with adhesive over its entire area, and the adhesive may be provided intermittently according to the application pattern of the adhesive.

[0095] Furthermore, the first absorbent body 10 has a shorter length in the width direction than the second absorbent body 20. Therefore, in the region where the first absorbent body 10 and the second absorbent body 20 overlap in the thickness direction, the region other than the joint portion 50 is defined as a separation portion 60.

[0096] In an absorbent article that is attached to an undergarment by the slip-prevention portion 30, such as the pad 1 of this embodiment, there is a problem that the absorbent article is prone to twisting (twisting or bending) due to a mismatch between the wearer's body movement and the underwear movement. In other words, compared to the part of the absorbent article that is fixed to the underwear, the part of the absorbent article that is not fixed to the underwear moves and twists in response to the wearer's body movement. The thick absorbent core part is particularly prone to twisting.

[0097] However, in the pad 1 of this embodiment, a pair of separation parts 60 is provided at both ends in the width direction, and the first absorbent body 10 and the second absorbent body 20 are separated from each other. Therefore, both ends in the width direction of the first absorbent body 10 can move freely relative to the second absorbent body 20 fixed to the underwear. Therefore, both ends in the width direction of the first absorbent body 10 can move following the opening and closing movement and the back and forth movement of the wearer's legs, making the pad 1 less likely to twist. In other words, even if the first absorbent body 10 on the skin side follows the movement of the wearer and the second absorbent body 20 on the non-skin side follows the movement of the underwear, the first absorbent body 10 and the second absorbent body 20 are partially separated, so that their movements are not restricted, making the pad 1 less likely to twist. By suppressing the twisting of the pad 1 when worn in this way, the size of the absorption surface of the pad can be secured, and leakage of excreted liquid can be suppressed. In addition, the fit and comfort of the pad 1 are also improved.

[0098] The joining portion 50 and the spaced portion 60 of the pad 1 may be arranged side by side in the width direction at least at a predetermined position in the longitudinal direction. However, as in the pad 1 of this embodiment (FIG. 4), the spaced portion 60 extends long in the longitudinal direction, so that both ends in the width direction of the first absorbent body 10 can move freely over a wide range in the longitudinal direction, making the pad 1 less likely to twist.

[0099] In addition, the portion of the pad 1 that contacts the crotch of the wearer is easily affected by the movement of the wearer's legs and is easily twisted. Therefore, in the longitudinal direction of the pad 1, a separation portion 60 is preferably provided in the portion of the pad 1 that contacts the crotch of the wearer. In the case of a pad 1 that is symmetrical in the longitudinal direction as in this embodiment, a portion including the longitudinal center 1C of the pad 1 (a position at 1 / 2 the length of the pad 1) is assumed to contact the crotch of the wearer, so that the separation portion 60 is preferably provided in that portion. In addition, the separation portion 60 is preferably provided in a portion that extends long forward so as to absorb a large amount of excreted liquid excreted to the front, and is biased rearward from the longitudinal center 1C of the pad 1, when it is assumed that the crotch of the wearer contacts the portion. Conversely, the separation portion 60 is preferably provided in a portion that extends long rearward so as to suppress rear leakage, and is biased forward from the longitudinal center 1C of the pad 1, when it is assumed that the crotch of the wearer contacts the portion.

[0100] In addition, as shown in FIG. 4, the joint 50 of the pad 1 in this embodiment has a narrow portion 501 (second narrow portion) having a length W3 in the width direction at the center in the longitudinal direction, and a pair of wide portions 502 (second wide portions) having a width direction length W4 longer than that of the narrow portion 501 at both ends in the longitudinal direction.

[0101] Therefore, the width of the separation portion 60 is long in the longitudinal center of the pad 1 where the wearer's crotch abuts and is easily affected by the wearer's leg movement. Therefore, in the longitudinal center of the pad 1, both ends of the first absorbent body 10 in the width direction are more likely to move following the movement of the wearer's legs, making the pad 1 less likely to twist. On the other hand, at both ends of the longitudinal direction of the pad 1, the first absorbent body 10 and the second absorbent body 20 are firmly joined, so that the first absorbent body 10 and the second absorbent body 20 can be prevented from being separated from each other while the pad 1 is being worn. In addition, at both ends of the longitudinal direction of the pad 1, the influence of the wearer's leg movement is smaller, so that even if the width of the separation portion 60 is short, twisting of the pad 1 can be suppressed.

[0102] As described above, the narrow width portion 501 of the joint 50 is preferably provided in a portion of the pad 1 that contacts the crotch portion of the wearer. Therefore, the central portion in the longitudinal direction of the pad 1 where the narrow width portion 501 is provided may be a portion including the longitudinal center 1C or a portion biased forward or backward from the longitudinal center 1C, depending on the shape of the pad 1. However, it is not limited to the above, and the width of the joint 50 may be constant.

[0103] Furthermore, the pad 1 is less prone to twisting due to the presence of the spaced apart portions 60, but the spaced apart portions 60 are less rigid than the joint portions 50 and are therefore more likely to deform. Furthermore, the spaced apart portions 60 located at the ends in the width direction are more likely to be subjected to the force of the wearer's legs. Therefore, as shown in FIG. 5, it is preferable to position at least a part of the slip prevention portion 30 on the outer side of the inner end 60a of the spaced apart portions 60 in the width direction. In this embodiment, the four side adhesive portions 32 are positioned on the outer side of the inner end 60a of the spaced apart portions 60 in the width direction.

[0104] By doing so, the separated portion 60 of the second absorbent body 20 fixed to the underwear by the slip prevention portion 30 can be restored by utilizing the restoring force of the underwear. For example, even if the separated portion 60 of the second absorbent body 20 is compressed inward in the width direction together with the underwear by the wearer's legs, the underwear will restore to its original shape after the compressive force is released, and the separated portion 60 of the second absorbent body 20 can also return to its original position (near the edge of the underwear). Therefore, the second absorbent body 20 is likely to maintain a state in which it is spread in the width direction, and is unlikely to twist. In addition, the size of the absorption surface of the pad 1 that receives the excreted liquid is secured, so that the excreted liquid is unlikely to leak.

[0105] In addition, in cases where the longitudinal length of the separation portion 60 is short, the portion of the anti-slip portion 30 that extends widthwise outward from the separation portion 60 may be positioned, for example, longitudinally outward from the separation portion 60.

[0106] However, it is more preferable that, when the pad 1 is viewed in a plan view in the thickness direction, the slip prevention portion 30 has a portion that overlaps with the spaced portion 60. In this embodiment, a portion on the longitudinal center side of the side adhesive portion 32 (portion 321 shown in FIG. 5) overlaps with the spaced portion 60. By doing so, even if the spaced portion 60 of the second absorbent body 20 is deformed, it is likely to return to its original position (near the edge of the underwear) due to the restoring force of the underwear, and the second absorbent body 20 is likely to maintain its state expanded in the width direction.

[0107] 2, the anti-slip portion 30 preferably has, at the longitudinal center, a narrow portion 301 having a predetermined widthwise length (W1), and, at both longitudinal ends, a pair of wide portions 302 each having a widthwise length (W2) longer than the narrow portion 301. The wide portions 302 preferably have a portion that extends outward in the widthwise direction beyond the outer ends 301a of the narrow portions 301 in the widthwise direction.

[0108] Specifically, the narrow width portion 301 is defined as a region in the longitudinal center of the pad 1, from the anti-slip portion 30 located on the furthest side in the width direction to the anti-slip portion 30 located on the furthest side in the width direction. The wide width portion 302 is defined as a region in the longitudinal end of the pad 1, from the anti-slip portion 30 located on the furthest side in the width direction to the anti-slip portion 30 located on the furthest side in the width direction.

[0109] In this embodiment, the narrow width portion 301 is a region between the side adhesive portions 32 provided at both ends of the pad 1 in the longitudinal direction, and is the region from the central adhesive portion 31 on one side in the width direction to the adhesive portion 31 on the other side in the width direction (region surrounded by points abcd). The wide width portion 302 is a region where the side adhesive portions 32 are arranged in the longitudinal direction of the pad 1, and is the region from the side adhesive portion 32 on one side in the width direction to the side adhesive portion 31 on the other side in the width direction (region surrounded by points efgh). In the narrow width portion 301 and the wide width portion 302, the slip prevention portions 30 may be arranged intermittently in the width direction (adhesive may be applied) as in this embodiment, or the slip prevention portions 30 may be arranged over the entire region.

[0110] Since the slip prevention portion 30 has the narrow portion 301, the second absorbent body 20 is not fixed to the vicinity of the edge of the underwear at the longitudinal center of the pad 1 that abuts against the crotch portion of the wearer. Therefore, the wearer is less likely to feel a foreign body sensation when closing his / her legs, and the wearer can easily close his / her legs. Meanwhile, at both longitudinal ends of the pad 1, the second absorbent body 20 is fixed to the vicinity of the edge of the underwear over a wide range in the width direction of the underwear by the wide portion 302. Therefore, the second absorbent body 20 is more likely to maintain a state in which it is spread in the width direction due to the restoring force of the underwear, and is less likely to wrinkle.

[0111] As described above, the narrow width portion 301 of the anti-slip portion 30 is preferably provided in a portion of the pad 1 that comes into contact with the crotch portion of the wearer. Therefore, the central portion in the longitudinal direction of the pad 1 where the narrow width portion 301 is provided may be a portion including the longitudinal center 1C of the pad 1, or a portion biased forward or backward from the longitudinal center 1C of the pad 1, depending on the shape of the pad 1.

[0112] However, the shape of the anti-slip portion 30 is not limited to the above. For example, the length of the anti-slip portion 30 in the width direction may be constant. Also, the anti-slip portion 30 does not have to extend outward in the width direction beyond the inner end 60a of the spaced portion 60 in the width direction. Even in this case, the anti-slip portion 30 has wide portions 302 at both ends in the longitudinal direction, so that the second absorbent body 20 can easily maintain a state in which it is widened in the width direction.

[0113] Moreover, the more the slip prevention portion 30 is disposed on the outer side in the width direction of the pad 1, the easier it is for the second absorbent body 20 to maintain a state of being spread in the width direction. On the other hand, as shown in FIG. 8, both ends of the pad 1 in the width direction are raised toward the skin side by rubber thread 18 or the like, thereby suppressing lateral leakage of excreted liquid. In this embodiment, the first absorbent body 10 and the second absorbent body 20 are separated at their ends in the width direction, and the end in the width direction of the first absorbent body 10 stands up. Therefore, even if the slip prevention portion 30 is disposed on the outer side in the width direction so as to overlap with the separating portion 60, the end in the width direction of the first absorbent body 10 can stand up. In other words, by having the separating portion 60 in the pad 1, the slip prevention portion 30 can be disposed on the outer side in the width direction of the pad 1 while the end in the width direction of the first absorbent body 10 stands up.

[0114] Moreover, the pair of central adhesive parts 31 are arranged with a widthwise interval greater than or equal to the width of each central adhesive part 31. In other words, no slip prevention part 30 is arranged in the center of the width of the pad 1. This makes it difficult for the slip prevention parts 30 to adhere to each other, and thus makes it possible to prevent the pad 1 from becoming distorted.

[0115] The pad 1 may be provided to the wearer in an individually wrapped state (not shown). As an example of an individual package 70 of the pad 1, as shown in FIG. 6, the pad 1 is placed on a packaging material 71, and the pad 1 is folded together with the packaging material 71 at two folds F1 and F2 along the width direction and fixed with a fastening tape 72. However, the present invention is not limited to this. For example, the pad 1 and the packaging material 71 may be folded separately, the number of folds along the width direction may be three, or the pad 1 may be folded at a fold along the width direction and a fold along the longitudinal direction. The pad 1 may be fixed to the packaging material 71 via a release paper (not shown).

[0116] When the anti-slip portion 30 has a pair of wide portions 302 at both ends in the longitudinal direction, it is preferable that folded portions F1, F2 are provided between the pair of wide portions 302 along the width direction in the longitudinal direction.

[0117] By doing so, the wide portion 302 and the folded portions F1, F2 do not overlap in the thickness direction of the pad 1, and therefore the wide portion 302 does not develop a fold. As a result, both longitudinal ends of the second absorbent body 20 are firmly fixed to the underwear by the wide portion 302. Therefore, the second absorbent body 20 is likely to maintain a state in which it is spread out in the width direction due to the restoring force of the underwear, and is less likely to twist.

[0118] Since the pad 1 has a thickness, the folded portions F1 and F2 are regions with a width in the longitudinal direction. The positions of the apexes of the folded portions F1 and F2 bent into a mountain shape are defined as the center lines of the folded portions F1 and F2. Specifically, when a weight (e.g., 200 g) is placed on the plane of the individual packaging body 70 through a plate larger than the plane of the individual packaging body 70 in the folded state, the position at which the individual packaging body 70 protrudes most is obtained as the center line of the folded portions F1 and F2. The maximum thickness of the individual packaging body 70 (pad 1 + packaging material 71) at the folded portions F1 and F2 is defined as t. In this case, the folded portions F1 and F2 are defined as the regions that are separated by πt / 2 on both sides of the center line of the folded portions F1 and F2 in the longitudinal direction of the pad 1.

[0119] As described above, the second absorbent body 20 is prevented from twisting by the arrangement of the slip prevention portion 30. On the other hand, the portion of the pad 1 where the thick absorbent core is arranged is prone to twisting. Therefore, the first absorbent body 10 is prevented from twisting by the absorbent core.

[0120] In other words, the first absorbent core 11 has a lower basis weight (g / m2) of pulp fibers than the second absorbent core 21. 2 ) is preferably reduced. More preferably, the first absorbent core 11 does not have pulp fibers and has a superabsorbent polymer (SAP). The first absorbent core 11 of this embodiment is composed of only SAP. By reducing the basis weight of the pulp fibers in the first absorbent core 11 or making it zero, the thickness of the first absorbent core 11 becomes thinner. Therefore, the first absorbent body 10 becomes less prone to twisting. However, it is not limited to the above, and the first absorbent core 11 may have a greater basis weight of pulp fibers than the second absorbent core 21.

[0121] Furthermore, whether the first absorbent core 11 has SAP and no pulp fibers can be confirmed by a known method, for example, by visually checking the surface or cross section of the first absorbent core 11 or by checking based on an image projected by an optical microscope.

[0122] Furthermore, when the first absorbent core 11 or the second absorbent core 21 has a different basis weight of pulp fiber depending on the planar position, the average basis weight or the maximum or minimum basis weight may be compared. The basis weight of the pulp fiber of the first absorbent core 11 and the second absorbent core 21 can be compared by a known method. Specifically, when the first absorbent core 11 or the second absorbent core 21 does not have SAP and is composed only of pulp fiber, it is advisable to measure the mass and plan area of ​​the entire absorbent cores 11, 21, or to measure the mass of a sample cut out to a predetermined area from the absorbent cores 11, 21. Then, the mass is measured by measuring the mass of the sample cut out to a predetermined area of ​​1 m. 2 The basis weight of the pulp fibers can be obtained by converting the basis weight into the mass of pulp fibers per unit area.

[0123] Furthermore, when the first absorbent core 11 or the second absorbent core 21 has both SAP and pulp fibers, the basis weight of the pulp fibers can be obtained, for example, by the following method. First, an arbitrary mass of SAP is taken out from the absorbent core 11, 21 to be measured, and neutralization titration is carried out using 1 mol / L hydrochloric acid to prepare a calibration curve and determine the polymer coefficient of the SAP. A sample is then cut from the absorbent core and the planar area of ​​the sample and the mass of the sample (SAP+pulp fibers) are measured. After that, the sample is placed in ion-exchanged water with an appropriate amount of sodium chloride dissolved in it, and 1 ml of 1 mol / L hydrochloric acid is injected at a time, and the amount of hydrochloric acid injected is read at the point when the pH meter reading, which measures the pH of the ion-exchanged water, changes significantly. The read value multiplied by the above polymer coefficient is the mass of SAP contained in the sample. By subtracting the mass of the SAP from the mass of the sample, we can obtain the mass of the pulp fiber contained in the sample. Based on that mass and the area of ​​the sample, we can obtain the basis weight of the pulp fiber.

[0124] Moreover, the first absorbent body 10 is in direct contact with the wearer's body and is easily affected by the wearer's movements, and is therefore prone to losing its shape. In particular, after absorbing excretory liquid, the first absorbent body 10 swells and is prone to losing its shape. Therefore, it is preferable that the first absorbent body 10 has heat-fusible fibers and does not have cellulosic fibers. In other words, the top sheet 14, the intermediate sheet 15, the first skin-side core wrap 12, the first non-skin-side core wrap 13, and the first side sheet 16 are preferably sheets such as nonwoven fabrics having heat-fusible fibers. Moreover, the first absorbent core 11 is preferably composed of SAP without having pulp fibers, which are cellulosic fibers. Note that examples of heat-fusible fibers include fibers made of thermoplastic resins. Examples of thermoplastic resins include olefin-based resins such as polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA), polyester-based resins such as polyethylene terephthalate (PET) and polylactic acid (PLA), and polyamide-based resins such as 6-nylon. When the above-mentioned fibers are used in the top sheet 14, intermediate sheet, core wraps 12, 13, etc., it is advisable to subject them to a hydrophilic treatment using a hydrophilic oil or the like.

[0125] Materials containing cellulosic fibers (such as tissues and pulp fibers) have many hydrogen bonds, and when they absorb moisture, water molecules exist between the bonds, making them prone to collapse. On the other hand, heat-fusible fibers are bonded to each other by heat fusion, and do not collapse even when they absorb moisture. Therefore, the first absorbent body 10 is less likely to lose its shape and become twisted even after excretion. However, the above is not limiting, and the first absorbent body 10 may or may not contain cellulosic fibers.

[0126] It can be confirmed by a known method that the first absorbent body 10 contains heat-fusible fibers and does not contain cellulosic fibers. For example, it can be confirmed by visual inspection or based on an image projected by an optical microscope whether or not the fibers constituting the first absorbent body 10 are colored using an identification dye (Kayastain Q manufactured by Shikisen Co., Ltd.) that colors heat-fusible fibers.

[0127] Moreover, while the first absorbent core 11 is composed of SAP, the second absorbent core 21 preferably has pulp fibers. This allows the excreted liquid excreted in the first absorbent body 10 to easily transfer to the second absorbent body 20. This prevents the first absorbent body 10 from swelling, losing its shape, and becoming easily twisted.

[0128] As shown in the cross-sectional views of Fig. 3 and Fig. 7, in the first absorbent body 10 of this embodiment, the first side sheet 16, which is a hydrophobic nonwoven fabric, is arranged so that its widthwise outer end portion wraps both widthwise edges of the first core portions 11-13, the top sheet 14, and the intermediate sheet 15. Therefore, the first side sheet 16 can prevent the excreted liquid absorbed by the first core portions 11-13 from seeping out. The pair of first side sheets 16 is also arranged with a gap therebetween in the width direction. Therefore, excreted liquid can migrate from the first core portions 11-13 to the second core portions 21-23.

[0129] Further, the outer end of the first side sheet 16 in the width direction extends outward in the width direction beyond both ends of the first core portions 11-13, the top sheet 14, and the intermediate sheet 15 in the width direction. More specifically, at the outer end of the first side sheet 16 in the width direction, the portion of the first side sheet 16 extending from the non-skin side of the first core portions 11-13 and the portion of the first side sheet 16 folded back from the extended portion to the skin side of the top sheet 14 overlap with each other via the rubber thread 18. In this manner, it is preferable that the nonwoven fabric (first side sheet 16) is disposed at both ends of the first absorbent body 10 in the width direction, and the first absorbent core 11 is not disposed. This can prevent both ends of the first absorbent body 10 in the width direction from swelling due to the first absorbent core 11 after excretion. Therefore, the first absorbent body 10 is less likely to lose its shape and become twisted even after excretion.

[0130] Furthermore, since the thick first absorbent core 11 is not disposed between the first side sheets 16 at the widthwise end of the first absorbent body 10, the wearer is less likely to feel a foreign body when closing his / her legs. This improves the comfort of the pad 1. Furthermore, the first side sheet 16 may be any liquid-impermeable sheet, and may be a synthetic resin film or the like. However, since the first side sheet 16 is a hydrophobic nonwoven fabric, it feels soft when the wearer closes his / her legs, improving the comfort of the pad 1.

[0131] Furthermore, in the portions where the first side sheets 16 extend from the first core portions 11-13, that is, in the portions where the first absorbent core 11 is not disposed at both widthwise ends of the first absorbent body 10, the two layers of the first side sheets 16 made of nonwoven fabric are preferably bonded together with adhesives A6, A7. This increases the rigidity of both widthwise ends of the first absorbent body 10, making the first absorbent body 10 less likely to lose its shape or become twisted.

[0132] In addition, the joining of two layers of first side sheets 16 (nonwoven fabrics) may be in the form of folding back one first side sheet 16 as in this embodiment, and joining the folded back portion and the non-folded portion overlapping it, or in the form of a first side sheet extending from the skin side of the top sheet 14 and a first side sheet extending from the non-skin side of the first core portions 11-13 being separate, and two first side sheets being joined together. However, the use of a single first side sheet 16 folded back as in this embodiment has no seams in the nonwoven fabric, and can further suppress seepage of excreted fluid. In addition, the two layers of first side sheets 16 may be joined via rubber thread 18, top sheet 14, or intermediate sheet 15. In addition, the joining of nonwoven fabrics may be the joining of three or more layers of first side sheets 16 overlapping each other.

[0133] In addition, it is preferable that a pair of rubber threads 18 that stretch in the longitudinal direction is disposed at both ends of the first absorbent body 10 in the width direction, where the first side sheets 16 are joined to each other. This increases the rigidity of both ends of the first absorbent body 10 in the width direction, making the first absorbent body 10 less likely to lose its shape and less likely to twist. In particular, in this embodiment, since the rubber threads 18 are disposed at the ends of the first absorbent body 10 in the width direction, the first absorbent body 10 is less likely to lose its shape. However, this is not limited to the above, and the first absorbent core 11 may be disposed up to the ends of the first side sheet 16 in the width direction, and the rubber threads 18 may not be disposed on the first side sheet 16.

[0134] Moreover, the pad 1 preferably has a compressed portion 40 that is compressed in the thickness direction as shown in Fig. 3. The fiber density of the pad 1 is higher in the compressed portion 40 than in the surrounding area. Therefore, by providing the compressed portion 40 in the pad 1, the pad 1 is less likely to lose its shape and become less likely to wrinkle.

[0135] Furthermore, the compressed sections 40 of this embodiment are compressed from the skin side from the topsheet 14 to the second core sections 21-23. In this way, it is preferable that the compressed sections 40 extending from the first absorbent body 10 to the second absorbent body 20 in the thickness direction are provided at the joint section 50 of the pad 1. By doing so, parts of the first absorbent body 10 and the second absorbent body 20 are joined together by the compressed sections 40, making the first absorbent body 10 and the second absorbent body 20 less likely to lose their shape and become less likely to wrinkle.

[0136] In addition, since the compressed portion 40 has a high fiber density, the excreted liquid is easily drawn in. Therefore, the compressed portion 40 extending from the first absorbent body 10 to the second absorbent body 20 makes it easier for the excreted liquid to transfer from the first absorbent body 10 to the second absorbent body 20. By quickly transferring the excreted liquid to the second absorbent body 20, the first absorbent body 10 is less likely to swell and is less likely to lose its shape or become twisted. In addition, it is possible to prevent the excreted liquid from overflowing and leaking from the pad 1 due to the first absorbent body 10 being unable to absorb all the excreted liquid.

[0137] However, without being limited to the above, the compression section 40 may be one that individually compresses the first absorbent body 10 and the second absorbent body 20. Furthermore, the pad 1 may be provided with both a compression section that individually compresses the first absorbent body 10 and the second absorbent body 20, and a compression section that spans from the first absorbent body 10 to the second absorbent body 20. Furthermore, the pad 1 does not have to have a compression section 40.

[0138] ===Pad 1 leakage suppression=== As described above, in the pad 1, at least at a predetermined position in the longitudinal direction, a joint portion 50 where the first absorbent body 10 and the second absorbent body 20 are joined is provided in the center in the width direction, and a pair of separation portions 60 where the first absorbent body 10 and the second absorbent body 20 are separated are provided at both ends in the width direction.

[0139] Therefore, as shown in Fig. 8, a pair of separated portions 60 (both ends in the width direction) of the first absorbent body 10 can stand up on the skin side relative to the second absorbent body 20. Specifically, as shown in the cross-sectional view of Fig. 7, a portion of the first absorbent body 10 on the outer side in the width direction of the adhesive A12 that bonds the first side sheet 16 and the second side sheet 25 can stand up on the skin side.

[0140] In the pad 1 of this embodiment, a pair of rubber threads 18 that expand and contract in the longitudinal direction are arranged at both widthwise ends (a pair of spaced portions 60) of the first absorbent body 10. Contraction of the rubber threads 18 improves the standing ability of the spaced portions 60 of the first absorbent body 10. Therefore, as shown in Fig. 8, the cross-sectional shape of the pad 1 becomes saucer-shaped.

[0141] Furthermore, in the pad 1 of this embodiment, the compression section 40 is disposed on the inside in the width direction of the pair of separation sections 60. In the compression section 40, the first absorbent body 10 is compressed in the thickness direction from the topsheet 14. As the topsheet 14 is depressed in the thickness direction in the compression section 40, the end portion in the width direction of the topsheet 14 is pulled inward in the width direction. As a result, the standing ability of the separation sections 60 of the first absorbent body 10 is improved, and the cross-sectional shape of the pad 1 becomes saucer-shaped.

[0142] When the cross-sectional shape of the pad 1 is saucer-shaped, even when a relatively large amount of excreted liquid is excreted into the first absorbent body 10, the excreted liquid can be stopped by the standing separation parts 60 of the first absorbent body 10, and side leakage of the excreted liquid can be suppressed. In addition, the slope of the standing separation parts 60 allows the excreted liquid to be collected in the center of the width direction of the first absorbent body 10. In other words, the excreted liquid is collected in the center of the width direction of the pad 1 where the first absorbent core 11 and the second absorbent core 21 (hereinafter collectively referred to as "absorbent cores 11, 21") are arranged, and therefore the excreted liquid is easily absorbed and retained inside the pad 1. Therefore, leakage of the excreted liquid from the pad 1 can be suppressed.

[0143] 4, the joint 50 of this embodiment has a narrow portion 501 in the longitudinal center and wide portions 502 at both longitudinal ends. Therefore, the width of the separated portion 60 is wide at the longitudinal center of the pad 1 where the wearer's crotch contacts and excreted liquid is excreted, and the separated portion 60 of the first absorbent body 10 can stand up high. This makes it possible to suppress leakage of excreted liquid.

[0144] 4, the wide portion 502 of the joint 50 is preferably disposed outside the stretchable portions 18a-18b of the rubber thread 18 in the longitudinal direction. In other words, it is preferable that the stretchable portions of the rubber thread 18 do not extend in the longitudinal direction to the portions where the first absorbent body 10 and the second absorbent body 20 are joined widely at both longitudinal ends of the pad 1. This prevents the standing of the spaced portion 60 in the longitudinal center of the pad 1 from being hindered by the joint 50 (wide portion 502). Therefore, in the portion of the pad 1 where excreted liquid is excreted, the spaced portion 60 of the first absorbent body 10 can stand up, and leakage of the excreted liquid can be suppressed.

[0145] The rubber thread 18 may be arranged over the entire longitudinal length of the spaced apart portion 60, or, as in this embodiment, the rubber thread 18 may be arranged over only a portion of the longitudinal length of the spaced apart portion 60.

[0146] 7, in the pad 1 of this embodiment, the first side sheet 16, which is a hydrophobic nonwoven fabric, is disposed on most of the skin-side surface of the spaced portion 60. In this manner, it is preferable that the surface closest to the skin side of the spaced portion 60 has a hydrophobic portion 80.

[0147] By doing so, in the separated portion 60 of the upright first absorbent body 10, the excreted liquid is less likely to be drawn into the inside of the first absorbent body 10, and the excreted liquid is more likely to move to the center part in the width direction of the first absorbent body 10. This makes it possible to suppress lateral leakage of the excreted liquid. In addition, since the excreted liquid gathers in the center part in the width direction of the pad 1 where the absorbent cores 11, 21 are arranged, the excreted liquid is more likely to be absorbed and retained inside the pad 1. This makes it possible to suppress the excreted liquid from overflowing and leaking from the pad 1.

[0148] The hydrophobic portion 80 is a portion that has a characteristic that when liquid is dropped onto its surface, the liquid does not spread easily. More specifically, the hydrophobic portion 80 is a portion that has a characteristic that the dropped liquid has a contact angle of more than 90°. The hydrophobic fibers contained in the hydrophobic nonwoven fabric (first side sheet 16) can be any hydrophobic fiber that is used in the art, and for example, olefin fibers such as polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), etc. can be used alone or in combination.

[0149] 7, in the pad 1 of this embodiment, the outer widthwise ends of the first side sheets 16 extend outward in the widthwise direction beyond the widthwise edges of the first core portions 11-13, and the two-layer first side sheets 16 are joined with adhesives A6 and A7. In this manner, it is preferable that the first absorbent core 11 is not disposed at the widthwise ends of the separation portions 60, which are the widthwise ends of the first absorbent body 10, and that the first side sheets 16, which are hydrophobic nonwoven fabrics, are joined together.

[0150] This improves the standing ability of the separated portion 60 and suppresses leakage of excreted liquid compared to when the first absorbent core 11 is arranged up to the widthwise end of the separated portion 60. In addition, since the widthwise end of the separated portion 60 is less likely to swell and is more likely to maintain its shape even after excretion, the standing separated portion 60 can suppress leakage of excreted liquid. In addition, since the hydrophobic nonwoven fabric (first side sheet 16) is two-layered, the hydrophobicity of the separated portion 60 is increased and excreted liquid is more likely to flow to the center of the pad 1 in the widthwise direction.

[0151] Furthermore, as shown in FIG. 4, when the pad 1 is viewed in a plane in the thickness direction, it is preferable that the second absorbent core 21 is not disposed in the portion (201) of the second absorbent body 20 that overlaps with the widthwise end of the wide portion 502 of the joint 50.

[0152] This reduces the rigidity of the end portion (201) in the width direction of the second absorbent body 20 that is joined to the first absorbent body 10 in a wide area. The portion (201) of the second absorbent body 20 with low rigidity can bend due to contraction in the longitudinal direction of the rubber thread 18. This prevents the second absorbent body 20 from hindering the standing of the separated portion 60 of the first absorbent body 10, thereby suppressing leakage of excreted liquid.

[0153] Furthermore, as shown in FIG. 6, when the pad 1 has folded portions F1, F2 along the width direction at the time of packaging, it is preferable that the stretchable portions (18a to 18b) of the rubber thread 18 overlap (intersect) with the folded portions F1, F2 when the pad 1 is viewed in a plane in the thickness direction.

[0154] From a hygienic viewpoint, an absorbent article such as the pad 1 is folded with the skin side of the pad 1 facing inward. Therefore, in the pad 1 in its natural state after being removed from the individual package 70, the folds of the folds F1 and F2 tend to cause both ends of the pad 1 in the longitudinal direction to rise toward the skin side relative to the longitudinal center. Therefore, since the rubber thread 18 extends to both ends of the pad 1 in the longitudinal direction that rise due to the folds of the folds F1 and F2, the rubber thread 18 tends to shrink in the longitudinal direction. As a result, the standing ability of the separation portion 60 of the first absorbent body 10 is improved, and leakage of excreted liquid can be suppressed.

[0155] Furthermore, when at least a part of the pad 1 in the thickness direction has a groove portion recessed in the thickness direction, the groove portion may have a length in the longitudinal direction and be provided on the inner side in the width direction than the separating portion 60. The pad 1 of this embodiment (FIG. 1) is provided with a pair of compressing portions 40 (first compressing portions 41) extending in the longitudinal direction as the groove portion.

[0156] By providing the grooves in the pad 1, excreted liquid discharged in the center of the width of the pad 1 or flowing to the center of the width of the pad 1 due to the slope of the standing separation portion 60 can be spread in the longitudinal direction of the pad 1 along the grooves. Specifically, in the case of a groove recessed from the skin side of the pad 1, the excreted liquid on the skin side of the pad 1 can be spread in the longitudinal direction. In addition, in the case of a groove provided inside the pad 1, the excreted liquid absorbed in the pad 1 can be spread in the longitudinal direction. Therefore, even when a relatively large amount of excreted liquid is excreted, the excreted liquid can be prevented from overflowing and leaking from the pad 1.

[0157] Furthermore, the grooves (first compressed portions 41) extending in the longitudinal direction are areas where the pad 1 is recessed in the thickness direction from the skin side of the pad 1, and it is preferable that the skin side of the grooves is non-hydrophobic. As shown in FIG. 3, the first compressed portions 41 in this embodiment are areas compressed from the topsheet 14, which is a liquid-permeable sheet (non-hydrophobic sheet), towards the non-skin side. In this case, excreted liquid that flows into the grooves (first compressed portions 41) is absorbed into the pad 1 while being diffused in the longitudinal direction. This prevents excreted liquid from overflowing and leaking from the pad 1.

[0158] In addition, being non-hydrophobic refers to the property that a liquid spreads easily when dropped on a surface, specifically, the property that the dropped liquid has a contact angle of 90° or less.

[0159] Furthermore, like the first compressed portion 41 of this embodiment, the groove portion extending in the longitudinal direction is preferably a compressed portion provided in the thickness direction from the first absorbent body 10 to the second absorbent body 20. Since the compressed portion 40 has a high fiber density, excreted liquid is easily drawn in. Therefore, the compressed portion 40 extending from the first absorbent body 10 to the second absorbent body 20 makes it easier for the excreted liquid to transfer from the first absorbent body 10 to the second absorbent body 20. This makes it possible to prevent the first absorbent body 10 from being unable to absorb all the excreted liquid, causing the excreted liquid to overflow and leak from the pad 1.

[0160] However, the grooves extending in the longitudinal direction are not limited to those recessed from the skin side of the pad 1, or to the compressed parts 40. For example, the grooves (compressed parts 40) may be provided only in the first absorbent body 10, or only in the second absorbent body 20. The grooves may also be parts of the absorbent cores 11, 21 whose basis weight is lower than the surrounding areas, or parts (slits) where part of the absorbent cores 11, 21 is removed. The pad 1 does not have to have grooves.

[0161] In this embodiment, grooves (first compressed portions 41) extending in the longitudinal direction are provided in the first absorbent core 11, and the first absorbent core 11 contains a superabsorbent polymer (SAP). In this case, it is preferable that the grooves (first compressed portions 41) in the first absorbent core 11 have a lower basis weight of SAP than the areas adjacent to the grooves. More preferably, no SAP is disposed in the grooves.

[0162] 9 is a diagram illustrating the arrangement of the first absorbent core 11 and the first compressed sections 41. As shown in the figure, in the first core sections 11-13 of this embodiment, SAP is not arranged in the portion where the first compressed sections 41 are provided. This makes it easier for the excreted liquid to transfer from the first absorbent body 10 to the second absorbent body, and makes it easier for the excreted liquid to be absorbed into the pad 1. This makes it possible to prevent the excreted liquid from overflowing and leaking from the pad 1 due to the first absorbent body 10 not being able to absorb all of the excreted liquid.

[0163] The basis weight of the SAP in the groove portion and the adjacent portion can be compared by a known method. For example, it can be compared visually or based on images taken with an electron microscope. Alternatively, samples may be cut out from the groove portion and the adjacent portion to obtain the amount of SAP per given area and calculate the basis weight. When the first absorbent core 11 is composed of only SAP, the mass of the sample is the mass of SAP. When the first absorbent core 11 has pulp fibers and SAP, the mass of SAP in the sample (first absorbent core 11) can be obtained by the above-mentioned method.

[0164] In addition, it is preferable that the second absorbent body 20 has a larger maximum absorption amount of excreted liquid than the first absorbent body 10. By doing so, the excreted liquid that has migrated from the first absorbent body 10 to the second absorbent body 20 can be absorbed and held by the second absorbent body 20, so that the return (rewetting) of the excreted liquid to the first absorbent body 10 can be suppressed. This prevents the first absorbent body 10 from being unable to absorb all the excreted liquid, causing the excreted liquid to overflow and leak from the pad 1. In addition, the comfort of the pad 1 is improved. However, this is not limited to the above, and the first absorbent body 10 may have a larger maximum absorption amount of excreted liquid than the second absorbent body 20.

[0165] The maximum amount of excreted liquid absorbed by the first absorbent body 10 and the second absorbent body 20 can be measured, for example, according to the water absorption test method for superabsorbent polymers in JIS K7223 (1996). Briefly, a sample (e.g., 0.20 g or 1.00 g) is cut out from the first and second absorbent cores 11, 21 of the first and second absorbent bodies 10, 20 to be measured. The mass of the sample is a (g). Then, the sample is placed in a tea bag made of 250 mesh nylon net. The tea bag is immersed in the test liquid (deionized water or 0.9% by mass salt solution) for 1 hour. The tea bag is then hung (for example, for 10 minutes) to drain, and the weight of the tea bag after draining is designated as b (g). Similarly, an empty tea bag is immersed in the test liquid and weighed c (g) after draining. The above operation should be performed multiple times (for example, 5 times) to obtain the average values ​​of the measured values ​​a to c (g). The absorption amount W (g / g) per 1 g of the sample is calculated by the formula "W = (bca) / a". The absorption amount W (g / g) of each sample is multiplied by the mass (g) of the first absorbent core 11 and the mass (g) of the second absorbent core 21 to calculate a value. The calculated values ​​are the maximum absorption amounts (saturated absorption amounts) of the first absorbent body 10 and the second absorbent body 20, and may be compared. Note that when the basis weight or the like differs depending on the planar position of the absorbent core, for example, the entire absorbent core may be used as a sample.

[0166] Furthermore, the second absorbent core 21 of this embodiment contains pulp fibers and superabsorbent polymer (SAP). Therefore, the pulp fibers, which easily draw in excreted liquid, allow the excreted liquid to swiftly transfer from the first absorbent body 10 to the second absorbent body 20. This makes it possible to prevent the excreted liquid from overflowing and leaking from the pad 1. In addition, the SAP can absorb and retain the excreted liquid that has transferred to the second absorbent body 20, making it possible to prevent the excreted liquid from returning to the first absorbent body 10.

[0167] However, without being limited to the above, the second absorbent core 21 may have pulp fibers and may not have superabsorbent polymer (SAP). In this case, the excreted liquid can be quickly transferred from the first absorbent body 10 to the second absorbent body 20, and overflow and leakage of the excreted liquid from the pad 1 can be suppressed. Furthermore, since the diffusion of the excreted liquid is not inhibited by SAP, the excreted liquid is diffused widely in the planar direction of the second absorbent core 21. Therefore, the absorption performance of the second absorbent core 21 is effectively utilized.

[0168] Whether the second absorbent core 21 contains pulp fibers and whether it contains or does not contain SAP can be confirmed by a known method. For example, a method of visually checking the surface or cross section of the second absorbent core 21 or checking based on an image projected by an optical microscope can be adopted.

[0169] 2, the slip prevention portion 30 of the pad 1 of this embodiment has a narrow portion 301 in the center of the pad 1 in the longitudinal direction, and a pair of wide portions 302 at both ends of the pad 1 in the longitudinal direction. Therefore, at both ends of the pad 1 in the longitudinal direction, the second absorbent body 20 is likely to maintain a state in which it is widened in the width direction due to the restoring force of the underwear, and is unlikely to twist. As a result, leakage of excreted liquid can be suppressed. On the other hand, at the center of the pad 1 in the longitudinal direction, the wearer can easily close his / her legs, but it is difficult to maintain a state in which it is widened in the width direction compared to both ends of the pad 1 in the longitudinal direction.

[0170] Therefore, it is preferable that the stretchable portion of the rubber thread 18 extends further outward in the longitudinal direction than the narrow portion 301 of the slip prevention portion 30. Specifically, it is preferable that the end 18a on one longitudinal side of the stretchable portion of the rubber thread 18 is located further outward in the longitudinal direction than the end 302a on the longitudinal center side of the wide portion 302 on one longitudinal side. It is also preferable that the end 18b on the other longitudinal side of the stretchable portion of the rubber thread 18 is located further outward in the longitudinal direction than the end 302b on the longitudinal center side of the wide portion on the other longitudinal side.

[0171] By doing so, in the longitudinal center of the pad 1, the width of the slip prevention portion 30 is narrow, but the elastic portion of the rubber thread 18 is present over the entire longitudinal area, and the spaced portion 60 of the first absorbent body 10 stands up. Therefore, in the longitudinal center of the pad 1, the standing spaced portion 60 of the first absorbent body 10 can suppress leakage of excreted liquid. However, this is not limited to the above, and the rubber thread 18 does not have to be disposed extending to the wide portion 302.

[0172] ===Second embodiment=== 10A and 10B are schematic cross-sectional views of the longitudinal center portion of a pad 70 of the second embodiment. The pad 70 of the second embodiment has an absorbent body 80, which may have a plurality of absorbent cores (absorbents) stacked in the thickness direction as in the pad 1 of the first embodiment, or may have a single layer of absorbent core (absorbent body).

[0173] The pad 70 shown in FIG. 10A has a single layer of absorbent body 80. The single layer of absorbent body 80 makes the pad 70 less stiff and improves comfort. The absorbent body 80 includes an absorbent core 81, a skin-side core wrap 82, a non-skin-side core wrap 83, a top sheet 84 arranged closer to the skin than the skin-side core wrap 82 (absorbent core 81), an intermediate sheet 85 arranged between the top sheet 84 and the skin-side core wrap 82, a pair of side sheets 86 arranged at both ends in the width direction of the absorbent body 80, and a pair of rubber threads 87 (elastic members) fixed to the side sheets 86 at both ends in the width direction of the absorbent body 80 and stretchable in the longitudinal direction. The pad 70 also includes a liquid-impermeable back sheet 71 arranged closer to the skin than the absorbent body 80, and a pair of second side sheets 72 arranged at both ends in the width direction on the skin side of the back sheet 71. Each material is bonded with adhesives A1 to A7, A11, and A12 such as hot melt.

[0174] In addition, the absorbent core 81 contains a superabsorbent polymer (SAP), and the mass ratio of the superabsorbent polymer in the absorbent core 81 is higher than the mass ratio of the pulp fiber. In other words, the value obtained by dividing the mass of the superabsorbent polymer contained in the absorbent core 81 by the mass of the absorbent core 81 is greater than the value obtained by dividing the mass of the pulp fiber contained in the absorbent core 81 by the mass of the absorbent core 81. Therefore, the thickness of the absorbent core 81 is reduced, and the absorbent body 80 is less likely to twist. The fact that there is less pulp fiber or no pulp fiber means that the pulp fiber formed does not collapse due to the movement of the wearer or the absorption of excreted liquid, and the absorbent body 80 is less likely to twist. On the other hand, by increasing the mass ratio of the superabsorbent polymer, the absorption speed of excreted liquid increases, and excreted liquid is less likely to leak. In addition, even if the mass ratio of the pulp fiber is reduced, the absorption performance of the absorbent core 81 is maintained.

[0175] The mass ratio of the pulp fiber and the superabsorbent polymer is measured by a known method. When the absorbent core 81 has both the superabsorbent polymer and the pulp fiber, for example, the method for obtaining the basis weight of the pulp fiber described in the first embodiment includes the method for measuring the mass of SAP contained in the sample (the method described in JP 2018-47189 A) and the method described in JP 2018-542962 A.

[0176] The side sheets 86 are folded back inward in the width direction from the non-skin side of the absorbent core 81, covering both widthwise edges of the absorbent core 81, so as to be located on both widthwise ends of the skin side of the top sheet 84. The side sheets 86 in FIG. 10A are folded back inward in the width direction from between the skin side core wrap 82 folded back to the non-skin side and the second side sheet 72, so as to be located on the skin side of the top sheet 84. Therefore, both widthwise edges of the absorbent core 81 are covered by the seamless side sheets 86. Therefore, excreted liquid is less likely to seep out to the outside of the side sheets 86. In addition, in order to further suppress the seepage of excreted liquid, it is preferable that the side sheets 86 are hydrophobic sheets. The side sheets 86 arranged at both widthwise ends of the absorbent body 80 may be two sheets as shown in FIG. 10A, or one sheet as shown in FIG. 10B.

[0177] Further, rubber threads 87 that stretch in the longitudinal direction are fixed to the side sheets 86. Therefore, both ends in the width direction of the absorbent core 81 wrapped in the side sheets 86 are raised toward the skin side by the rubber threads 87, and the cross-sectional shape of the absorbent body 80 is a saucer shape. This makes it possible to suppress side leakage of excreted liquid. In the case of FIG. 10A, an end 88 of the absorbent body 80 on the outer side in the width direction of the adhesive A12 that bonds the side sheets 86 and the second side sheet 72 rises toward the skin side. However, this is not limited to the above, and for example, the side sheets 86 may be bonded to the second side sheets 72 up to their width direction ends, and the second side sheets 72 and the back sheet 71 may also rise toward the skin side together with the side sheets 86.

[0178] The side sheet 86 is a sheet having at least one of fused fibers, entangled fibers, and fibers bonded by a bonding material. The sheet having fused fibers is a sheet in which a part of a fiber web is melted by heat to bond the fibers together, and examples of such a sheet include air-through nonwoven fabric, spunbond nonwoven fabric, and point-bond nonwoven fabric. The sheet having entangled fibers is a sheet in which fibers are entangled by a high-pressure water flow, and examples of such a sheet include spunlace nonwoven fabric. The sheet having fibers bonded by a bonding material is a sheet in which fibers are bonded by a bonding material (adhesive) by wetting a fiber web with an adhesive solution, and examples of such a sheet include air-laid nonwoven fabric.

[0179] With the above-described side sheet 86, the constituent fibers are less likely to come undone, and the fusion points and bonding material increase the rigidity. Therefore, even if the absorbent body 80 is subjected to force due to the wearer's movements or the absorbent core 81 absorbs excretory liquid, the side sheet 86 makes it easier for the absorbent body 80 to maintain its shape and makes it less likely to twist. Therefore, the end portions 88 of the absorbent body 80 in the width direction are also more likely to remain standing.

[0180] Similarly to the pad 1 of the first embodiment, the side sheets 86 are preferably nonwoven fabrics and extend outward in the width direction from both ends of the absorbent core 81 in the width direction. In other words, it is preferable that nonwoven fabrics (side sheets 86) are arranged at both ends of the absorbent body 80 in the width direction, and that the absorbent core 81 is not arranged. This can prevent both ends of the absorbent body 80 in the width direction from swelling due to the absorbent core 81 after excretion. Therefore, the absorbent body 80 is less likely to lose its shape and twist even after excretion, and the end 88 in the width direction of the absorbent body 80 is more likely to be kept standing. Also, since the thick absorbent core 81 is not arranged at the end of the absorbent body 80 in the width direction, the wearer is less likely to feel a foreign body sensation when closing his / her legs.

[0181] Furthermore, in the portion where the side sheets 86 extend outward in the width direction beyond the absorbent core 81, that is, in the portion where the absorbent core 81 is not disposed at both ends in the width direction of the absorbent body 80, it is preferable that the folded back two-layer nonwoven fabric (the side sheets 86) are bonded together with adhesives A6 and A7. This increases the rigidity of both ends in the width direction of the absorbent body 80, making the absorbent body 80 less likely to lose its shape or twist, and making it easier to maintain the standing of the end 88 in the width direction of the absorbent body 80. The folded back two-layer side sheets 86 may be bonded via a top sheet 84 or an intermediate sheet 85 (another nonwoven fabric).

[0182] It is also preferable that rubber threads 87 are disposed at both ends of the absorbent body 80 in the width direction, where the side sheets 86 are joined together. This further increases the rigidity of both ends of the absorbent body 80 in the width direction, making the absorbent body 80 less likely to lose its shape or twist, and making it easier to maintain the upright ends 88 of the absorbent body 80 in the width direction.

[0183] 10B, the pad 70 may have a second absorbent core 89 disposed on the non-skin side of the absorbent core 81 in the thickness direction. This improves the absorption performance of the pad 70. In addition, excreted liquid that has migrated to the second absorbent core 89 is less likely to return to the skin side of the pad 70, improving the comfort of the pad 70.

[0184] When a plurality of absorbent cores are arranged in a stacked manner in the thickness direction, as long as the side sheets 16 are folded back so as to cover both widthwise edges of the absorbent core 11 on the skin side (or non-skin side) as in the pad 1 of the first embodiment, the side sheets may not cover both widthwise edges of the absorbent core 21 on the non-skin side (or skin side). Alternatively, as shown in FIG. 10B, both widthwise edges of the absorbent cores 81, 89 arranged in a stacked manner in the thickness direction may be folded back so as to be covered by a common side sheet 86. Alternatively, although not shown, the side sheets may cover both widthwise edges of the absorbent core on the skin side and the absorbent core on the non-skin side individually. The same applies when three or more layers of absorbent cores are arranged in a stacked manner, and it is sufficient that the side sheets are folded back so as to cover both widthwise edges of at least one absorbent core.

[0185] ===Third embodiment=== Fig. 11 is a schematic cross-sectional view of a longitudinal end of a pad 90 of the third embodiment. Fig. 12 is a schematic plan view of the pad 90 showing the arrangement of the slip prevention portion 30 and the fixing portion 91. The pad 90 of the third embodiment also has an absorbent body 80, similar to the pad 70 of the second embodiment, and may have a plurality of absorbent cores (absorbents) stacked in the thickness direction, or may have a single layer of absorbent core (absorbent body).

[0186] The pad 90 shown in Fig. 11 has the same configuration as the pad 70 of the second embodiment shown in Fig. 10A (Fig. 11 and Fig. 10A are cross-sectional views at different positions in the longitudinal direction). That is, the absorbent body 80 of the pad 90 includes side sheets 86 arranged at both ends in the width direction of the absorbent body 80, and a pair of rubber threads 87 (elastic members) that are fixed to the side sheets 86 at both ends in the width direction of the absorbent body 80 and stretch in the longitudinal direction. Therefore, both ends in the width direction of the absorbent body 80 stand up toward the skin side by the rubber threads 87, and the cross-sectional shape of the absorbent body 80 is saucer-shaped. This makes it possible to suppress lateral leakage of excreted liquid.

[0187] Specifically, both ends of the side sheet 86 in the longitudinal direction are fixed to any part of the pad 90 by a pair of fixing parts 91. In FIG. 11, the part of the side sheet 86 folded back toward the non-skin side from the absorbent core 81 is fixed to the second side sheet 72 by the fixing part 91 (adhesive A12). As shown in FIG. 12, the fixing parts 91 are provided spaced apart in the longitudinal direction, and the part of the side sheet 86 between the pair of fixing parts 91 in the longitudinal direction can rise toward the skin side by contraction of the rubber thread 87. For example, both ends 88 in the width direction of the absorbent body 80 described in FIG. 10A (parts wrapped by the side sheet 86) rise. In addition, both ends 88 in the width direction of the absorbent body 80 rise from the inner ends 91a of the fixing parts 91 in the longitudinal direction as starting points.

[0188] However, in the pad 90 of the third embodiment, the side sheets 86 do not have to be folded back widthwise inward so as to wrap both widthwise edges of the absorbent core 81. Even in this case, both longitudinal ends of the side sheets 86 are fixed to any part of the pad 90 (e.g., the top sheet 84, etc.) by a pair of fixing parts 91. Also, a configuration may be adopted in which a pocket-shaped three-dimensional gather is formed in which the inner part of the side sheets 86 in the width direction opens up due to the part of the side sheets 86 that stands up towards the skin.

[0189] Similarly to the pad 1 of the first embodiment, the pad 90 of the third embodiment is provided with a slip prevention portion 30 (adhesive portion) on the non-skin side. When the pad 90 is viewed in plan in the thickness direction as shown in Fig. 12, the fixing portion 91 has a portion that overlaps with the slip prevention portion 30 (side adhesive portion 32). This allows both ends 88 of the absorber 80 in the width direction to stand on the skin side from the portion fixed to the underwear by the slip prevention portion 30 as the starting point. This stabilises the standing of both ends 88 of the absorber 80 in the width direction, making it possible to more reliably block excreted liquid.

[0190] Furthermore, the provision of the slip prevention portion 30 at a position overlapping the fixing portion 91 in the thickness direction means that the slip prevention portion 30 is provided on the non-skin side of the pad 90, even in the outermost portion in the width direction. Therefore, even if the pad 90 is compressed inward in the width direction together with the underwear by the wearer's legs, the underwear can return to its original shape after the compression force is released, and the pad 90 can also return to its original shape. Therefore, the pad 90 is likely to maintain its widthwise expanded state and is less likely to twist. Furthermore, the size of the absorbing surface of the pad 90 that receives the excreted liquid is ensured, making it less likely for the excreted liquid to leak.

[0191] The absorbent core 81 also contains a superabsorbent polymer (SAP). This increases the rate at which excreted liquid is absorbed, making it less likely for the excreted liquid to leak. The mass of the pulp fibers contained in the absorbent core 81 can be reduced to make the absorbent core 81 less likely to twist, while ensuring the absorption performance of the absorbent core 81. Preferably, the mass ratio of the superabsorbent polymer in the absorbent core 81 is higher than the mass ratio of the pulp fibers, but the mass ratio of the pulp fibers may be equal to or greater than the mass ratio of the superabsorbent polymer.

[0192] Similarly to the pad 70 of the second embodiment, the side sheet 86 is a sheet having at least one of fused fibers, intertwined fibers, and fibers bonded by a bonding material. This makes it difficult for the constituent fibers to come undone, and the rigidity is increased by the fused points and the bonding material. Therefore, even if the absorbent body 80 is subjected to force due to the wearer's movements or the absorbent core 81 absorbs excreted liquid, the shape of the absorbent body 80 is easily maintained by the side sheet 86, and it is difficult for it to twist. Therefore, the end portion 88 in the width direction of the absorbent body 80 is easily maintained standing.

[0193] Similarly to the pad 70 of the second embodiment, the side sheets 86 are nonwoven fabric, and it is preferable that the nonwoven fabric (side sheets 86) is arranged at both widthwise ends of the absorbent body 80, and the absorbent core 81 is not arranged. This can prevent both widthwise ends of the absorbent body 80 from swelling due to the absorbent core 81 after excretion. Therefore, even after excretion, the absorbent body 80 is less likely to lose its shape or twist, and the end portions 88 in the widthwise direction of the absorbent body 80 tend to maintain their standing.

[0194] Furthermore, in the portions where the absorbent core 81 is not disposed at both ends of the absorbent body 80 in the width direction, the folded back two-layer nonwoven fabric (the side sheets 86) are preferably bonded together with adhesives A6, A7. Also, it is preferable that rubber thread 87 is disposed at both ends of the absorbent body 80 in the width direction where the side sheets 86 are bonded together. This increases the rigidity of both ends of the absorbent body 80 in the width direction, making the absorbent body 80 less likely to lose its shape or twist, and making it easier to maintain the standing of the end portions 88 of the absorbent body 80 in the width direction.

[0195] Although the embodiment of the present invention has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof. [Explanation of symbols]

[0196] 1 (Light incontinence) pads (absorbent articles), 10 first absorbent body, 11 first absorbent core, 12 first skin side core wrap, 13 first non-skin side core wrap, 14 surface sheet, 15 intermediate sheet, 16 First side sheet (nonwoven fabric, hydrophobic nonwoven fabric), 17 Fragrance, 18 Rubber thread (elastic material), 20 second absorbent body, 21 second absorbent core, 22 first skin side core wrap, 23 second non-skin side core wrap, 24 back sheet, 25 2nd side seat, 30 anti-slip portion (adhesive portion), 301 wide portion, 302 narrow portion, 31 central adhesive part, 32 side adhesive part, 40: Compression section; 41: First compression section (groove section); 42: Second compression section; 50 joints, 501 wide portion (second wide portion), 502 narrow portion (second narrow portion), 60 Separation part, 70 Pad (absorbent article), 71 Back sheet, 72 Second side sheet, 80 absorbent body, 81 absorbent core, 82 skin side core wrap, 83 non-skin side core wrap, 84 surface sheet, 85 middle sheet, 86 side sheet (nonwoven fabric), 87 Thread rubber (elastic member), 88 End portion, 89 Second absorbent core, 90 Pad (absorbent article), 91 Fixing part, F1, F2 folding section

Claims

1. A longitudinal direction, a width direction, and a thickness direction, a first absorbent body having a first absorbent core; a second absorbent body having a second absorbent core and disposed closer to the skin than the first absorbent body in the thickness direction; An absorbent article having an adhesive portion provided on a non-skin side of the second absorbent body, At least at a predetermined position in the longitudinal direction, a joining portion provided in a center portion in the width direction, where the first absorbent body and the second absorbent body are joined; a pair of separation portions provided at both ends in the width direction, the first absorbent body and the second absorbent body being separated from each other; A pair of elastic members that stretch in the longitudinal direction are disposed in at least a portion of the pair of spaced apart portions of the first absorbent body, The joint is A second narrow portion having a certain length in the width direction is provided in the center portion in the longitudinal direction, a pair of second wide portions at both ends in the longitudinal direction, the pair of second wide portions being longer in the width direction than the second narrow portions; An absorbent article, characterized in that, in the longitudinal direction, the second wide portion is disposed outside the stretchable portion of the elastic member.

2. The absorbent article according to claim 1, An absorbent article, characterized in that at least a portion of the adhesive portion is located outside an inner end of the spaced portion in the width direction.

3. The absorbent article according to claim 2, An absorbent article, characterized in that, when the absorbent article is viewed in a plan view in the thickness direction, the adhesive portion has a portion that overlaps with the spaced portion.

4. The absorbent article according to any one of claims 1 to 3, The adhesive portion is A narrow portion having a predetermined length in the width direction is provided at a central portion in the longitudinal direction, An absorbent article characterized in having a pair of wide portions at both longitudinal ends, each of which has a longer length in the width direction than the narrow portion and has a portion extending outward in the width direction than the outer ends of the narrow portion in the width direction.

5. The absorbent article according to claim 4, an end of the stretchable portion of the elastic member on one side in the longitudinal direction is located outside in the longitudinal direction with respect to an end of the wide portion on the one side in the longitudinal direction on a central side in the longitudinal direction, An absorbent article characterized in that the other end of the elastic member in the longitudinal direction of the stretchable portion is located further outboard in the longitudinal direction than the end of the wide portion on the other side in the longitudinal direction of the center of the longitudinal direction.

6. The absorbent article according to claim 4 or 5, A folding portion for packaging is provided along the width direction, An absorbent article, characterized in that the folded portion is provided between the pair of wide portions in the longitudinal direction.

7. The absorbent article according to any one of claims 1 to 6, An absorbent article, wherein the first absorbent core has a lower basis weight of pulp fibers than the second absorbent core.

8. 8. The absorbent article according to claim 7, An absorbent article, wherein the first absorbent core does not contain pulp fibers and contains a highly absorbent polymer.

9. 9. The absorbent article according to claim 8, An absorbent article, wherein the first absorbent body has heat-fusible fibers and does not have cellulosic fibers.

10. An absorbent article according to any one of claims 1 to 9, An absorbent article, characterized in that nonwoven fabric is arranged at both ends of the first absorbent body in the width direction, and the first absorbent core is not arranged.

11. 11. The absorbent article of claim 10, An absorbent article, characterized in that in areas at both ends of the width direction of the first absorbent body where the first absorbent core is not arranged, nonwoven fabrics are joined together.

12. 12. The absorbent article of claim 11, An absorbent article, characterized in that the pair of elastic members are arranged at a portion where the nonwoven fabrics are joined to each other.

13. An absorbent article according to any one of claims 1 to 12, An absorbent article characterized in that, when the absorbent article is viewed in a plane in the thickness direction, the second absorbent core is not positioned in the portion of the second absorbent body that overlaps with the widthwise end of the second wide portion.

14. An absorbent article according to any one of claims 1 to 13, An absorbent article characterized in that at the widthwise ends of the spaced portions, the first absorbent core is not positioned, and hydrophobic nonwoven fabrics are joined together.

15. An absorbent article according to any one of claims 1 to 14, An absorbent article characterized in that at least a portion of the absorbent article in the thickness direction is a groove portion recessed in the thickness direction, and the groove portion having a length in the longitudinal direction is located more inward in the width direction than the separation portion.

16. The absorbent article of claim 15, The absorbent article, wherein the groove portion is a compressed portion provided from the first absorbent body to the second absorbent body in the thickness direction.

17. An absorbent article according to claim 15 or 16, The groove portion is provided in the first absorbent core, The first absorbent core comprises a superabsorbent polymer; An absorbent article, characterized in that in the first absorbent core, the groove portion has a lower basis weight of the superabsorbent polymer than the adjacent portion of the groove portion.

18. An absorbent article according to any one of claims 1 to 17, An absorbent article, characterized in that the second absorbent body has a larger maximum absorption amount of excrement than the first absorbent body.

19. An absorbent article according to any one of claims 1 to 18, An absorbent article, wherein the second absorbent core comprises pulp fibers and a superabsorbent polymer.

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