Absorbent article

Abstract

An object of the present invention is to provide an absorbent article capable of suppressing urine leakage.SOLUTION: An absorbent article includes a length along a longitudinal direction corresponding to a front-back direction of a wearer, a length along a width direction orthogonal to the longitudinal direction, an absorbent body, a water-permeable sheet disposed on a skin surface side of the wearer of the absorbent body, a pair of inner side leakage barriers disposed on an outer side in the width direction with respect to a center in the width direction and suppressing leakage of a liquid discharged by the wearer to an outer side in the width direction, and a pair of outer side leakage barriers disposed on an outer side in the width direction of the inner side leakage barriers and suppressing leakage of the liquid discharged by the wearer to the outer side in the width direction.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] Absorbent articles such as disposable diapers, absorbent pads, sanitary products, etc. For example, Patent Document 1 discloses a tape-type disposable diaper provided with three-dimensional gathers that function as a leak-proof wall to prevent liquid leakage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-068464 Summary of the Invention [Problem to be solved by the invention]

[0004] By providing a leak barrier in an absorbent article, the leak barrier comes into close contact with the wearer's skin, preventing leakage of urine and other excreted fluids. However, depending on the wearer's body shape or movements, the leak barrier may separate from the wearer's skin, which may result in leakage of urine and other excreted fluids from the space formed between the leak barrier and the wearer's skin.

[0005] An object of the present invention is to provide an absorbent article that can prevent urine leakage. [Means for solving the problem]

[0006] An absorbent article according to one aspect of the present invention comprises: a length along a longitudinal direction corresponding to the front-to-back direction of the wearer; a length along a width direction perpendicular to the longitudinal direction; An absorber; a water-permeable sheet disposed on the wearer's skin side of the absorbent body; a pair of inner leakage preventing walls that are disposed on the outer sides in the width direction relative to the center in the width direction and that prevent the liquid discharged by the wearer from leaking outward in the width direction; and a pair of outer leakage barrier walls arranged on the widthwise outer sides of the inner leakage barrier walls to prevent fluid discharged by the wearer from leaking outward in the widthwise direction. [Effects of the Invention]

[0007] According to the present invention, urine leakage can be suppressed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of the appearance of a diaper 1 according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the diaper according to the first embodiment. [Figure 3] FIG. 3 is a plan view of the diaper according to the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view of the diaper according to the first embodiment. [Figure 5] FIG. 5 is an enlarged cross-sectional view of the diaper according to the first embodiment, showing an end portion in the width direction. [Figure 6] FIG. 6 is a plan view of a diaper according to a second embodiment. [Figure 7] FIG. 7 is a cross-sectional view of a diaper according to a second embodiment. [Figure 8] FIG. 8 is a plan view of a diaper according to a third embodiment. [Figure 9] FIG. 9 is an enlarged cross-sectional view of a diaper according to a third embodiment, showing an end portion in the width direction. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes an embodiment of the present invention. The embodiment described below is one aspect of the present invention and does not limit the technical scope of the present invention.

[0010] First Embodiment In the first embodiment, the longitudinal direction of a tape-type disposable diaper (an example of an "absorbent article" as used herein, hereinafter simply referred to as "diaper") is the direction connecting the front body portion facing the wearer's abdomen and the back body portion facing the wearer's back. A crotch section, which is positioned between the front body portion (one side in the longitudinal direction) and the back body portion (the other side in the longitudinal direction) (at the center in the longitudinal direction) and is located adjacent to the wearer's crotch area (facing the crotch area). When the diaper is worn by a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inner side when worn) is the skin-facing side, and the side opposite the skin-facing side (the outer side when worn) is the non-skin-facing side. The thickness direction is the direction connecting the skin-facing side and the non-skin-facing side, and the width direction is the direction perpendicular to both the longitudinal direction and the thickness direction. A view from the thickness direction is a plan view. A diaper has a length along a longitudinal direction corresponding to the front-to-back direction of a wearer and a length along a width direction perpendicular to the longitudinal direction. Furthermore, terms relating to directions used in this application refer to directions corresponding to the front-to-back and left-to-right directions of a wearer when worn. For example, the left-to-right direction in this application means a direction corresponding to the left-to-right directions of a wearer when worn.

[0011] Fig. 1 is a perspective view of a diaper 1 according to a first embodiment. The diaper 1 has a crotch region 1B, which corresponds to the crotch area covering the wearer's genitals when worn, a front body region 1F located in front of the crotch region 1B and corresponding to the wearer's abdominal waist, and a back body region 1R located behind the crotch region 1B and corresponding to the wearer's back waist. The left and right edges of the back body region 1R are provided with mechanical fasteners on the skin-facing side of the wearer and with tapes 2L1, 2L2, 2R1, and 2R2 that can be attached by the mechanical fasteners to front patches 2F, which are provided in the front body region 1F and have loops on the non-skin-facing side. When the tapes 2L1, 2L2, 2R1, and 2R2 are attached to the front patch 2F with the front body region 1F positioned on the wearer's ventral side and the back body region 1R positioned on the wearer's back, the diaper 1 is secured to the wearer's body, encircling the wearer's abdomen and thighs. Since the diaper 1 is secured to the wearer's body in this manner, the wearer can freely change positions while wearing the diaper 1. The non-skin-facing sides of the tapes 2L1, 2L2, 2R1, and 2R2 are looped, just like the non-skin-facing side of the front patch 2F. Therefore, the tapes 2L1, 2L2, 2R1, and 2R2 can be overlapped on the front patch 2F.

[0012] The diaper 1 is provided with leg gathers 3AL, 3AR along the wearer's leg circumference (thighs) to prevent the formation of gaps between the diaper 1 and the wearer's skin that could serve as a liquid leakage path. Outer leakage barrier walls 30L, 30R are provided widthwise inward of the leg gathers 3AL, 3AR, and inner leakage barrier walls 31L, 31R are provided widthwise inward of the outer leakage barrier walls 30L, 30R. Waist gathers 3W are also provided along the wearer's abdominal circumference. The leg gathers 3AL, 3AR, inner leakage barrier walls 31L, 31R, outer leakage barrier walls 30L, 30R, and waist gathers 3W adhere closely to the wearer's skin due to the elastic force of the elastic members. Therefore, liquid excreted by the wearer is absorbed into the absorbent body 6 without leaking from the diaper 1. The elastic members may be selected from thread-like or strip-like rubber, etc., as appropriate.

[0013] Fig. 2 is an exploded perspective view of the diaper 1 according to the first embodiment. Fig. 3 is a plan view of the diaper 1 according to the first embodiment in a stretched state, as viewed from the skin side. Fig. 4 is a cross-sectional view of the diaper 1 according to the first embodiment, taken along line AA in Fig. 3. In Fig. 4, each component is illustrated thicker than it actually is to make the internal structure of the diaper 1 easier to understand, but in reality, the diaper 1 is very thin.

[0014] The diaper 1 according to this embodiment has a narrow, gourd-like shape in plan view, with the front and back body regions 1F and 1R being wider than the crotch region 1B. This planar shape allows the diaper 1 to easily fit the wearer's abdomen and buttocks when worn. The planar shape of the diaper 1 is not limited to a gourd shape and may be, for example, a rectangular or battledore shape.

[0015] The diaper 1 is provided with a cover sheet 4 that forms the outer surface when worn. The cover sheet 4 is a sheet-like member having substantially the same planar shape (gourd-shaped) as the diaper 1, with constrictions 4KL, 4KR in the areas corresponding to the long sides. The cover sheet 4 forms the outer surface of the diaper 1, has sufficient rigidity to withstand friction with clothing, etc., and is provided to reinforce the back sheet 5 (described later) and improve the feel. The constrictions 4KL, 4KR are provided in the areas where the wearer's thighs are located. The cover sheet 4 is generally made of a nonwoven fabric made of synthetic fibers such as polypropylene, polyethylene, and polyethylene terephthalate. The cover sheet 4 is liquid-impermeable and moisture-permeable. The cover sheet 4 is not limited to a single-layer structure, but may be a multi-layer structure having an inner cover sheet and an outer cover sheet.

[0016] The diaper 1 comprises a back sheet 5, an absorbent body 6, and a top sheet 8 (an example of the "water-permeable sheet" as used herein), which are layered in this order on the wearer-facing surface of the cover sheet 4. The back sheet 5 and the top sheet 8 are all sheet-like members having a generally rectangular appearance, and the absorbent body 6 is a mat-like member having a generally gourd-like appearance. The back sheet 5, the absorbent body 6, and the top sheet 8 are all layered in this order on the cover sheet 4 with their longitudinal directions coinciding with the longitudinal direction of the cover sheet 4.

[0017] The backsheet 5 has a generally rectangular appearance. The backsheet 5 is made of a thermoplastic, water-impermeable resin such as polyethylene film to prevent leakage of excreted fluid that has flowed into the absorbent body 6. The backsheet 5 has water-repellent properties to prevent urine and moisture from seeping out of the diaper 1 and breathability to prevent the diaper 1 from becoming stuffy when worn. The backsheet 5 may be breathable by having many tiny ventilation holes formed therein.

[0018] The diaper 1 includes a top sheet 8 disposed on the skin-facing side when the diaper 1 is worn. The top sheet 8 is the part that comes into contact with the wearer's skin when the diaper 1 is worn, and is a water-permeable sheet made of a liquid-permeable material that allows excreted liquids such as urine to pass through. The top sheet 8 may be made of a woven fabric, a nonwoven fabric, a porous film, or the like. The nonwoven fabric may be made of thermoplastic resin fibers such as polypropylene, polyethylene, polyester, or nylon that have been hydrophilized, or may be an air-through nonwoven fabric, a point-bonded nonwoven fabric, a spun-bonded nonwoven fabric, or a melt-blown nonwoven fabric.

[0019] An absorbent body 6 that absorbs urine and other excreted fluids excreted by the wearer is disposed on the non-skin facing side of the top sheet 8. The longitudinal direction of the absorbent body 6 coincides with the longitudinal direction of the diaper 1.

[0020] The absorbent body 6 is disposed on the non-skin-facing side of the top sheet 8, including the crotch region 1B, to absorb and retain fluid excreted by the wearer. In this embodiment, the absorbent body 6 has an absorbent core 6C containing an absorbent material and a core wrap sheet 7 that covers the entire absorbent core 6C. The longitudinal direction of the absorbent body 6 coincides with the longitudinal direction of the absorbent core 6C, the longitudinal direction of the core wrap sheet 7, and the longitudinal direction of the diaper 1.

[0021] The absorbent core 6C has an upper absorbent mat 6A arranged on the top sheet 8 side and a lower absorbent mat 6B arranged on the non-skin facing side. In a plan view, the upper absorbent mat 6A is wider in the front body region 1F and the back body region 1R than in the crotch region 1B, and has a gourd shape with the crotch region 1B narrowed. When viewed from the top sheet 8 side, the lower absorbent mat 6B is the upper absorbent mat 6A. The absorbent core 6 is disposed below the absorbent mat 6A (on the non-skin-facing side) and has a rectangular shape (rectangular shape) with its long sides aligned with the longitudinal direction of the diaper 1 in plan view. The upper and lower absorbent mats 6A and 6B are stacked in the thickness direction so that their respective widthwise centers are substantially aligned. In plan view, the upper absorbent mat 6A is larger than the lower absorbent mat 6B. The longitudinal direction of the absorbent core 6 coincides with the longitudinal directions of the upper and lower absorbent mats 6A and 6B and the diaper 1.

[0022] The crotch region 1B is sandwiched between the wearer's legs, so it is subjected to compressive pressure inward in the width direction. Meanwhile, in the front body region 1F and the back body region 1R, the wearer's weight exerts pressure in the thickness direction of the absorbent core 6C. To accommodate these pressures, the absorbent core 6C is provided with a constriction in the crotch region 1B. Furthermore, the upper-layer absorbent mat 6A and the lower-layer absorbent mat 6B are stacked to give the absorbent core 6C in the crotch region 1B a high basis weight. This prevents the absorbent core 6C from losing its shape inward in the width direction in the crotch region 1B. Furthermore, in the front body region 1F and the back body region 1R, the width of the absorbent core 6C is widened to increase the area on which the wearer's weight is applied, thereby preventing it from losing its shape in the thickness direction. For this reason, it is preferable to make the absorbent core 6C roughly gourd-shaped.

[0023] The absorbent core 6C has a structure in which granular absorbent resin (polymeric water-absorbing material) such as SAP (Super Absorbent Polymer), a hydrophilic polymer with a cross-linked structure that can absorb and retain water, is held in the gaps between short fibers of cellulosic fibers such as pulp, rayon, or cotton, or short fibers made from synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilically treated. These short fibers and SAP are examples of absorbent materials.

[0024] In this embodiment, SAP particles refer to a resin composition containing SAP in a granular form. The term "SAP-containing resin composition" as used herein encompasses both compositions consisting solely of SAP and compositions containing SAP as the primary component, with other substances added to the extent that they do not adversely affect water absorption. Examples of "other substances" include additives such as surface modifiers added to hydrophobize the particle surface, and unreacted monomers remaining during the synthesis of SAP. SAP particles can absorb approximately 10 to 100 times their own weight in liquid. The SAP particles may be, for example, granular particles with a diameter of approximately 0.1 to 0.5 mm before absorbing liquid.

[0025] While SAP particles can gel and retain liquid, it takes a certain amount of time for them to absorb the liquid. In diaper 1, the short fibers slow down the discharged liquid while diffusing it within the absorbent core 6C until the SAP particles have absorbed the liquid, allowing the discharged liquid to be absorbed by a wide range of SAP particles, thereby preventing the liquid from flowing back.

[0026] The absorbent core 6C may have an SAP layer (not shown) formed of a large number of SAP particles and disposed between the upper absorbent mat 6A and the lower absorbent mat 6B. The absorbent core 6C diffuses excreted liquids such as urine through the lower absorbent mat 6B, and retains the liquid through the SAP layer and the SAP contained in the upper absorbent mat 6A.

[0027] The core wrap sheet 7 is a water-permeable sheet that wraps the entire absorbent core 6C, and more specifically, it covers the skin-facing side, non-skin-facing side, and side surfaces of the absorbent core 6C. The core wrap sheet 7 maintains the shape of the absorbent core 6C when not in contact with excreted liquids such as urine, preventing it from losing its shape, and prevents the SAP particles contained in the upper absorbent mat 6A and the SAP particles contained in the SAP layer from escaping. Furthermore, SAP particles in a state where they have not absorbed moisture are like hard sand grains, and if these SAP particles in a state where they have not absorbed moisture escaping from the absorbent body 6 and come into direct contact with the wearer's skin, they may cause discomfort to the wearer. For this reason, the absorbent core 6C is wrapped in the core wrap sheet 7. This prevents the absorbent core 6C from losing its shape and also prevents the SAP particles from escaping to the outside of the absorbent body 6.

[0028] In this embodiment, the core wrap sheet 7 is made of a pulp fiber sheet or a thin nonwoven fabric. In this embodiment, tissue paper is used for the core wrap sheet 7. The core wrap sheet 7 may be formed from two sheets: an upper-layer core wrap sheet disposed between the upper-layer absorbent mat 6A and the top sheet 8, and a lower-layer core wrap sheet disposed on the non-skin-facing side of the lower-layer absorbent mat 6B, covering the side of the absorbent core 6C and further covering the outer side in the width direction of the upper-layer core wrap sheet. When the core wrap sheet 7 is formed from two sheets, the upper-layer core wrap sheet and the lower-layer core wrap sheet can be formed from different materials. As an example, the upper-layer core wrap sheet can be a pulp fiber sheet, and the lower-layer core wrap sheet can be a resin nonwoven fabric.

[0029] The diaper 1 may include two grooves 6H in the absorbent body 6, formed by compressing the absorbent body 6 in the thickness direction. The grooves 6H are located within the longitudinal length of the absorbent core 6C, with their front-to-rear ends located within the absorbent core 6C. The grooves 6H may be formed concavely on the skin-facing side by reducing the amount of absorbent material, such as staple fibers, forming the absorbent core 6C compared to portions other than the grooves 6H, or may be formed by penetrating the absorbent material forming the skin-facing side of the absorbent core 6C in the thickness direction. In this embodiment, the grooves 6H are formed in two lines extending longitudinally of the absorbent core 6C, approximately parallel to each other in the width direction, centered on the crotch region 1B. These lines are formed by compressing the absorbent core 6C, which is composed of the upper and lower absorbent mats 6A and 6B. Excreted liquid, such as urine, flows into the grooves 6H, moves longitudinally along the grooves 6H, and is rapidly absorbed over a wide area of ​​the absorbent body 6 in the longitudinal direction. Therefore, the diaper 1 according to this embodiment is provided with the grooves 6H, which allows for rapid diffusion of excreted liquid. As shown in Fig. 3, the grooves 6H do not reach the longitudinal ends of the absorbent body 6. Therefore, excreted liquid that has migrated outward in the longitudinal direction does not reach the longitudinal ends of the absorbent body 6, but remains inside the grooves 6H and is gradually absorbed.

[0030] The two grooves 6H form valley folds when the diaper 1 is viewed from the skin-facing side, and when the diaper 1 is worn, the absorbent 6 is folded in a W-shape in the crotch region 1B when viewed from the skin-facing side. As a result, the widthwise central portion of the absorbent 6 sandwiched between the two grooves 6H rises convexly toward the skin-facing side and comes into contact with the wearer's skin. This allows the raised portion of the absorbent 6 to easily come into contact with the wearer's urethral opening, allowing it to effectively absorb and retain urine excreted from the urethral opening.

[0031] Furthermore, the location of the wearer's excretory hole is limited, and excreted liquid tends to be excreted in the same location, but there is a limit to the amount of excreted liquid that the absorbent body 6 can hold in the same location. The grooves 6H have the function of diffusing the excreted liquid excreted by the wearer in the longitudinal direction of the absorbent body 6, and the excreted liquid dispersed by the grooves 6H is absorbed in parts of the absorbent body 6 that have excess holding capacity. The provision of the grooves 6H allows excreted liquid such as urine to be absorbed throughout the entire diaper 1.

[0032] The back sheet 5, absorbent body 6, and top sheet 8 all extend from the front body region 1F to the back body region 1R. Therefore, when the wearer's genitals are covered with the cover sheet 4, in which the back sheet 5, absorbent body 6, and top sheet 8 are laminated, the longitudinal ends of the back sheet 5, absorbent body 6, and top sheet 8 are located on the wearer's ventral and dorsal sides. In other words, the wearer's genitals are covered by the absorbent body 6 from the wearer's ventral to dorsal sides. Therefore, whether the wearer is lying supine or prone, excreted fluid comes into contact with the absorbent body 6 via the top sheet 8.

[0033] The diaper 1 has two diapers 1 arranged on the skin-facing side on both sides in the width direction of the diaper 1 and extending along the longitudinal direction. The inner side sheets 91L, 91R are provided with a pair of impermeable inner side sheets 91L, 91R (an example of the "inner leak-barrier-forming sheets" referred to in the present application) that are positioned in the crotch region 1B. The inner side sheets 91L, 91R are arranged so that their longitudinal ends coincide with the longitudinal ends of the top sheet 8. Note that the inner side sheets 91L, 91R only need to be positioned in at least the crotch region 1B, and do not necessarily have to be positioned so that their longitudinal ends coincide with the longitudinal ends of the top sheet 8.

[0034] The inner side sheets 91L, 91R have fixing regions 91LA, 91RA (an example of the "first bonding portion" in this application) located on the outer sides in the width direction. The fixing regions 91LA, 91RA are bonded to the top sheet 8, absorbent core 6, and back sheet 5, which are components located on the non-skin-facing side, with a hot melt adhesive.

[0035] The inner side sheets 91L, 91R are bonded to the top sheet 8 with a hot melt adhesive, and the widthwise inner ends of this hot melt adhesive form fold lines 31LL, 31LR (see FIG. 3), with the insides of the fold lines 31LL, 31LR forming the upstanding inner leakage preventing walls 31L, 31R. In other words, the fold lines 31LL, 31LR form the upstanding end portions of the inner leakage preventing walls 31L, 31R.

[0036] The widthwise inward portions of the inner side sheets 91L, 91R are free regions 91LB, 91RB that become the inner leakage barrier walls 31L, 31R. Near the ends of the free regions 91LB, 91RB, two rubber threads 31BL, 31BR, which are thread-like elastic members, are fixed with hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The inner side sheets 91L, 91R are also bonded to the top sheet 8 on their widthwise inner sides near their longitudinal ends, but the inner side in the longitudinal direction is not bonded to the hot melt adhesive at the widthwise inner side, allowing them to stand up against the skin. When the inner leakage barrier walls 31L, 31R on the inner side of the fold lines 31LL, 31LR stand up against the skin due to contraction of the rubber threads 31BL, 31BR, the ends of the free regions 91LB, 91RB become the skin-facing tips. The standing inner leakage preventing walls 31L, 31R inhibit the movement of excreted liquids such as urine and loose stools outward in the width direction of the inner leakage preventing walls 31L, 31R, thereby suppressing lateral leakage of these.

[0037] Substantially the entire longitudinal ends of the fold lines 31LL, 31LR of the inner side sheets 91L, 91R are bonded to the top sheet 8 with a hot melt adhesive, forming fixed parts 331L, 331R. The fixed areas 91LA, 91RA extend to both longitudinal ends of the inner side sheets 91L, 91R, so that the inner side sheets 91L, 91R are joined to the top sheet 8 over substantially the entire longitudinal ends. The absorbent body 6 is formed by laminating multiple absorbent mats, and is therefore thick. If the fixed parts 331L, 331R are provided in the areas overlapping the absorbent body 6, the biasing force of the rubber threads 31BL, 31BR will be less likely to be transmitted to the fixed parts 331L, 331R. If the fixing parts 331L, 331R are provided at locations where the absorber 6 does not extend, the fixing parts 331L, 331R can more easily follow the biasing force of the rubber threads 31BL, 31BR.

[0038] The ends of the free regions 91LB, 91RB that are longitudinally outer than the areas where the rubber threads 31BL, 31BR are arranged can also be left unattached to the top sheet 8 at the fixed portions 331L, 331R. By not adhering the ends of the free regions 91LB, 91RB to the top sheet 8, the biasing force of the ends of the free regions 91LB, 91RB is transmitted gently throughout the entire area of ​​the fixed portions 331L, 331R, and it is possible to prevent the biasing force of the rubber threads 31BL, 31BR from concentrating longitudinally inward of the fixed portions 331L, 331R.

[0039] The diaper 1 includes a pair of water-impermeable outer side sheets 90L, 90R (an example of the "outer leak-barrier-forming sheets" referred to in the present application) arranged on the skin-facing sides on both widthwise sides of the diaper 1 and extending along the longitudinal direction. The outer side sheets 90L, 90R have inner ends facing inwards. The outer side sheets 90L, 90R are disposed on the skin-facing side of the inner side sheets 91L, 91R so as to be located outward in the width direction of the diaper 1 relative to the inner ends of the side sheets 91L, 91R. The outer side sheets 90L, 90R have fixing regions 90LA, 90RA (an example of the "second bonding region" in this application) disposed on the width direction outer side. The fixing regions 90LA, 90RA are bonded to the inner side sheets 91L, 91R, top sheet 8, absorber 6, and back sheet 5, which are components disposed on the non-skin-facing side, with a hot melt adhesive.

[0040] The outer side sheets 90L, 90R are bonded to the inner side sheets 91L, 91R with a hot melt adhesive, and the widthwise inner ends of this hot melt adhesive form fold lines 30LL, 30LR (see FIG. 3), and the insides of the fold lines 30LL, 30LR form the upstanding outer leakage preventing walls 30L, 30R. In other words, the fold lines 30LL, 30LR form the upstanding ends of the outer leakage preventing walls 30L, 30R.

[0041] The widthwise inward portions of the outer side sheets 90L, 90R are free regions 90LB, 90RB that become the outer leakage barrier walls 30L, 30R. Near the ends of the free regions 90LB, 90RB, two rubber threads 30BL, 30BR, which are thread-like elastic members, are fixed with hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The widthwise inner sides of the outer side sheets 90L, 90R are also bonded to the top sheet 8 near the longitudinal ends, but the inner longitudinal sides are not bonded inward in the width direction than the hot melt adhesive, allowing them to stand up toward the skin. When the rubber threads 30BL, 30BR contract and the outer leakage barrier walls 30L, 30R inside the fold lines 30LL, 30LR stand up toward the skin, the ends of the free regions 90LB, 90RB become the skin-facing tips. The upright outer leakage preventing walls 30L, 30R inhibit the movement of excreted liquids such as urine and loose stools outward in the width direction of the outer leakage preventing walls 30L, 30R, thereby suppressing lateral leakage of these.

[0042] The outer side sheets 90L, 90R are bonded to the inner side sheets 91L, 91R with a hot melt adhesive over substantially the entire longitudinal ends of the fold lines 30LL, 30LR, forming fixed portions 330L, 330R. The fixed regions 90LA, 90RA extend to both longitudinal ends of the outer side sheets 90L, 90R, so that the outer side sheets 90L, 90R are joined to the inner side sheets 91L, 91R over substantially the entire longitudinal ends. The absorbent body 6 is thick because it is constructed by laminating multiple absorbent mats. Providing fixed portions 330L, 330R at the locations where the fixed portions 330L, 330R overlap the absorbent body 6 reduces the transmission of the biasing force of the rubber threads 30BL, 30BR to the fixed portions 330L, 330R. If the fixing parts 330L, 330R are provided at locations where the absorber 6 does not extend, the fixing parts 330L, 330R can more easily follow the biasing force of the rubber threads 30BL, 30BR.

[0043] The ends of the free regions 90LB, 90RB that are longitudinally outer than the areas where the rubber threads 30BL, 30BR are arranged can also be left unattached to the top sheet 8 at the fixed portions 330L, 330R. By not adhering the ends of the free regions 90LB, 90RB to the top sheet 8, the biasing force of the ends of the free regions 90LB, 90RB is transmitted gently throughout the entire area of ​​the fixed portions 330L, 330R, and it is possible to prevent the biasing force of the rubber threads 30BL, 30BR from concentrating longitudinally inward of the fixed portions 330L, 330R.

[0044] The outer side sheets 90L and 90R are formed such that the outer leakage prevention walls 30L and 30R are in contact with the inner leakage prevention wall 3 It is sufficient that they are formed outside the inner side sheets 91L and 31R, and they do not have to be arranged on the skin-facing side of the inner side sheets 91L and 91R.

[0045] 5 is an enlarged cross-sectional view showing the inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R in an upright position, showing the widthwise end portions of the diaper 1. The inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R are disposed on both sides of the diaper 1 in the widthwise direction. By having either the side leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R come into close contact with the wearer's skin, excreted liquid such as urine flows in the width direction of the diaper 1, thereby preventing lateral leakage from the diaper 1. Therefore, even if either the inner leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R do not come into close contact with the wearer's skin due to the wearer's body shape, either the inner leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R can still come into close contact, thereby preventing lateral leakage of excreted liquid such as urine. Furthermore, even if the diaper 1 shifts due to the wearer's movements, either the inner leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R can still come into close contact, thereby preventing lateral leakage of excreted liquid such as urine due to the wearer's movements, compared to when one leakage barrier wall is provided on each side of the diaper 1 in the width direction.

[0046] The fixed regions 91LA, 91RA of the inner side sheets 91L, 91R have a liquid-permeable treatment section 11 that has been subjected to a liquid-permeable treatment (processing) that allows excreted liquids such as urine to pass through to the non-skin-facing side. Because the fixed regions 91LA, 91RA have the impermeable inner side sheets 91L, 91R joined to the top sheet 8, excreted liquids such as urine that flow to the skin-facing side of the fixed regions 91LA, 91RA are less likely to flow to the non-skin-facing side of the fixed regions 91LA, 91RA and be absorbed by the absorbent body 6. For this reason, by providing the liquid-permeable treatment section 11 in the fixed regions 91LA, 91RA located between the inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R, excreted liquids such as urine that flow along the outer leakage barrier walls 30L, 30R to the skin-facing side of the fixed regions 91LA, 91RA are absorbed by the absorbent body 6 via the liquid-permeable treatment section 11.

[0047] The liquid-permeable treatment unit 11 may have openings provided in parts of the fixed regions 91LA, 91RA, which allow excreted liquid such as urine to permeate to the non-skin-facing side. Excreted liquid such as urine that flows to the skin-facing side of the fixed regions 91LA, 91RA flows from the openings to the non-skin-facing side of the fixed regions 91LA, 91RA. Therefore, excreted liquid such as urine that flows to the skin-facing side of the fixed regions 91LA, 91RA is absorbed by the absorber 6 through the openings.

[0048] The liquid-permeable treatment section 11 may have non-joined sections where the fixed regions 91LA, 91RA are not joined to a sheet provided on the non-skin-facing side of the fixed regions 91LA, 91RA, allowing excreted liquid such as urine to permeate to the non-skin-facing side. In the first embodiment, the sheet on the non-skin-facing side of the fixed regions 91LA, 91RA is the top sheet 8. Adhesives such as hot melt adhesives that join the top sheet 8 to the inner side sheets 91L, 91R are often impermeable. For this reason, by providing non-joined sections where the top sheet 8 and the inner side sheets 91L, 91R are not joined with a water-impermeable adhesive, excreted liquid such as urine that flows to the skin-facing side of the fixed regions 91LA, 91RA is more likely to flow from the non-joined sections to the non-skin-facing side of the fixed regions 91LA, 91RA. Therefore, excreted liquid such as urine that flows to the skin-facing side of the fixed regions 91LA, 91RA can be absorbed by the absorber 6.

[0049] The liquid-permeable treatment section 11 may be configured such that excreted liquids such as urine can permeate to the non-skin-facing side by subjecting the fixed regions 91LA and 91RA to hydrophilic treatment. By subjecting the fixed regions 91LA and 91RA to hydrophilic treatment, excreted liquids such as urine that have flowed to the skin-facing side of the fixed regions 91LA and 91RA can flow from the hydrophilically treated regions to the non-skin-facing side of the fixed regions 91LA and 91RA. This allows excreted liquids such as urine that have flowed to the skin-facing side of the fixed regions 91LA and 91RA to be absorbed by the absorber 6.

[0050] On the non-skin-facing side of the fold lines 30LL, 30LR, rubber threads 4LB, 4RB, which are thread-like elastic members, may be fixed between the cover sheet 4 and the back sheet 5 with a hot melt adhesive in a state stretched in the longitudinal direction of the diaper 1, with two rubber threads for each width direction. The rubber threads 4LB, 4RB are elastic members for forming the leg gathers 3AL, 3AR shown in Fig. 1. The number of rubber threads 4LB, 4RB is not limited to two, and may be any number determined depending on the elastic force (contractile force) required for the design of the diaper 1. When the rubber threads 4LB, 4RB are stretched, By arranging the diaper 1 in this state, the elastic threads 4LB and 4RB can be contracted to fit the diaper 1 around the legs of the wearer.

[0051] In addition, the cover sheet 4 may have rubber threads (not shown) arranged along the longitudinal direction of the diaper 1, inside the width direction of the diaper 1 and the wearer's abdominal circumference, to prevent gaps from forming between the diaper 1 and the wearer's abdominal circumference.

[0052] Furthermore, a rubber thread 9ER for forming a waist gather 3W between the back sheet 5 and the top sheet 8 may be provided at a position further back than the end of the absorbent body 6. The rubber thread 9ER is provided between the back sheet 5 and the top sheet 8 with its longitudinal direction, which is the direction of stretch, oriented in the left-right direction of the diaper 1. Therefore, when the tapes 2L1, 2L2, 2R1, 2R2 provided on both the left and right sides of the rubber thread 9ER are attached to the front patch 2F on the abdominal side of the wearer, the rubber thread 9ER exerts a contractile force to tightly fit the diaper 1 to the wearer and prevent the formation of a gap between the diaper 1 and the wearer's abdominal circumference.

[0053] In addition, the regions extending widthwise outward of the fold lines 30LL, 30LR of the outer leakage barrier walls 30L, 30R in a plan view are the ears 10L, 10R. In this embodiment, the ears 10L, 10R are formed in the front body region 1F and the back body region 1R. The upper-layer absorbent mat 6A is positioned to include the widthwise outer sides of the free regions 90LB, 90RB. The diaper 1 can increase the amount of liquid absorption by increasing the cushioning properties of the ears 10L, 10R and by forming the upper-layer absorbent mat 6A large. The ears 10L, 10R may be formed in either the front body region 1F or the back body region 1R.

[0054] <Second embodiment> Next, a second embodiment will be described. In the diaper 1 according to the second embodiment, the inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R may be formed from the same side sheets 9L, 9R. Other configurations are similar to those of the first embodiment. Fig. 6 is a plan view of the diaper 1 according to the second embodiment. Fig. 7 is a cross-sectional view of the diaper 1 according to the second embodiment taken along line BB in Fig. 6. The side sheets 9L, 9R are arranged so that their longitudinal ends coincide with the longitudinal ends of the top sheet 8. The side sheets 9L, 9R have fixing regions 90LA, 90RA arranged on their widthwise outer sides. The fixing regions 90LA, 90RA are bonded to the top sheet 8, absorbent core 6, and back sheet 5, which are components arranged on the non-skin-facing side, with a hot melt adhesive.

[0055] The side sheets 9L, 9R are bonded to the top sheet 8 with a hot melt adhesive, and the widthwise inner ends of this hot melt adhesive form fold lines 30LL, 30LR (see FIG. 6), with the insides of the fold lines 30LL, 30LR forming the upstanding outer leakage preventing walls 30L, 30R. In other words, the fold lines 30LL, 30LR form the upstanding end portions of the outer leakage preventing walls 30L, 30R.

[0056] The side sheets 9L, 9R are folded back in a mountain fold along the leading edges of the outer leakage barrier walls 30L, 30R, and the folded back side sheets 9L, 9R and the side sheets 9L, 9R standing on their widthwise outer sides are bonded to each other with an adhesive such as a hot melt adhesive. The outer leakage barrier walls 30L, 30R have free regions 90LB, 90RB, and near the ends of the free regions 90LB, 90RB, two rubber threads 30BL, 30BR, which are thread-like elastic members, are fixed with hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The side sheets 9L, 9R are also bonded to the top sheet 8 on their widthwise inner sides near their longitudinal ends, but the inside of the longitudinal sides is not bonded on the widthwise inner side beyond the hot melt adhesive, allowing them to stand up toward the skin. When the elastic threads 30BL and 30BR contract, the outer leakage preventing walls 30L and 30R inside the fold lines 30LL and 30LR rise up toward the skin side, and the free area 90L The ends of B and 90RB are the tips on the skin-facing side. The upright outer leakage preventing walls 30L and 30R inhibit the movement of excreted liquids such as urine and loose stools outward in the width direction of the outer leakage preventing walls 30L and 30R, thereby suppressing lateral leakage of these.

[0057] Fixing regions 91LA, 91RA where the side sheets 9L, 9R are adhered to a non-skin facing member are disposed on the inner side of the outer leakage barrier walls 30L, 30R in the width direction of the diaper 1. In the second embodiment, the non-skin facing member of the side sheets 9L, 9R is the back sheet 5.

[0058] The inner leakage barrier walls 31L, 31R are disposed on the widthwise inner sides of the fixing regions 91LA, 91RA of the diaper 1. The inner leakage barrier walls 31L, 31R are formed by folding lines 31LL, 31LR (see FIG. 6) at the widthwise inner ends of the fixing regions 91LA, 91RA, and by raising the inner sides of the folding lines 31LL, 31LR. In other words, the folding lines 31LL, 31LR form the raised end portions of the inner leakage barrier walls 31L, 31R.

[0059] The widthwise inward portions of the fold lines 31LL, 31LR are free regions 91LB, 91RB that become the inner leakage barrier walls 31L, 31R. Near the ends of the free regions 91LB, 91RB, two rubber threads 31BL, 31BR, which are thread-like elastic members, are fixed with hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The side sheets 9L, 9R are also bonded to the top sheet 8 on their widthwise inner sides near their longitudinal ends, but the inner longitudinal portions are not bonded to the skin-facing side at the widthwise inner side than the hot melt adhesive, allowing them to stand up toward the skin. When the rubber threads 31BL, 31BR contract and the inner leakage barrier walls 31L, 31R inside the fold lines 31LL, 31LR stand up toward the skin-facing side, the ends of the free regions 91LB, 91RB become the skin-facing tips. The standing inner leakage preventing walls 31L, 31R inhibit the movement of excreted liquids such as urine and loose stools outward in the width direction of the inner leakage preventing walls 31L, 31R, thereby suppressing lateral leakage of these.

[0060] The diaper 1 has inner leakage barrier walls 31L, 31R and outer leakage barrier walls 30L, 30R disposed on both sides in the width direction by a single side sheet 9L, 9R. Therefore, when either the inner leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R comes into close contact with the wearer's skin, excreted liquid such as urine flows in the width direction of the diaper 1, thereby preventing side leakage to the outside of the diaper 1. For example, even if either the inner leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R do not come into close contact with the wearer's skin due to the wearer's body shape, side leakage can be prevented as long as the other of the inner leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R comes into close contact with the wearer's skin. Furthermore, even if the diaper 1 shifts due to the wearer's movements, either the inner leakage barrier walls 31L, 31R or the outer leakage barrier walls 30L, 30R can adhere tightly, thereby suppressing side leakage due to the wearer's movements compared to when one leakage barrier wall is provided on each side of the width of the diaper 1.

[0061] Substantially the entire areas of both longitudinal ends of the fold lines 31LL, 31LR, 30LL, 30LR of the side sheets 9L, 9R may be bonded to the top sheet 8 with a hot melt adhesive, forming fixed parts 331L, 331R, 330L, 330R. The fixed areas 91LA, 91RA, 90LA, 90RA extend to both longitudinal ends of the side sheets 9L, 9R, so that the side sheets 9L, 9R are joined to the top sheet 8 over substantially the entire areas of both longitudinal ends. The absorbent body 6 is thick because it is formed by laminating multiple absorbent mats, and providing fixed parts 331L, 331R, 330L, 330R in areas overlapping the absorbent body 6 makes it difficult for the biasing force of the rubber threads 31BL, 31BR, 30BL, 30BR to be transmitted to the fixed parts 331L, 331R, 330L, 330R. If the fixing parts 331L, 331R, 330L, and 330R are provided in areas where the absorber 6 does not extend, the fixing parts 331L, 331R, 330L, and 330R can more easily follow the biasing force of the rubber threads 31BL, 31BR, 30BL, and 30BR.

[0062] The free regions 91LB, 91RB, 90LB, and 90RB that are longitudinally outboard of the regions where the rubber threads 31BL, 31BR, 30BL, and 30BR are disposed can also be left unattached to the top sheet 8 at the fixed portions 331L, 331R, 330L, and 330R. Because the free regions 91LB, 91RB, 90LB, and 90RB are not adhered to the top sheet 8, the biasing force of the free regions 91LB, 91RB, 90LB, and 90RB is gently transmitted throughout the entire fixed portions 331L, 331R, 330L, and 330R, and it is possible to prevent the biasing force of the rubber threads 31BL, 31BR, 30BL, and 30BR from concentrating on the longitudinally inner side of the fixed portions 331L, 331R, 330L, and 330R.

[0063] <Third embodiment> Next, a third embodiment will be described. In the third embodiment, the inner leakage barrier walls 31L, 31R may support the upright state of the outer leakage barrier walls 30L, 30R, thereby increasing the height of the outer leakage barrier walls 30L, 30R in the crotch region of the wearer. Fig. 8 is a plan view of a diaper 1 according to the third embodiment. Fig. 9 is an enlarged view of the widthwise end portion of a cross-sectional view of the diaper 1 according to the third embodiment taken along line CC in Fig. 8. Fig. 9(A) is an enlarged view showing a state in which the inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R are not upright. Fig. 9(B) is an enlarged view showing a state in which the inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R are upright. The configuration of the diaper 1 other than the inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R is the same as that of the first embodiment.

[0064] The inner leakage barrier walls 31L, 31R are disposed on both skin-facing sides in the width direction of the diaper 1 and are formed by a pair of water-impermeable inner side sheets 91L, 91R extending in the longitudinal direction.

[0065] The inner side sheets 91L, 91R are arranged in the crotch region 1B. The inner side sheets 91L, 91R have fixing regions 91LA, 91RA arranged on the widthwise outer sides. The fixing regions 91LA, 91RA are bonded to the top sheet 8, absorbent body 6, and back sheet 5, which are components arranged on the non-skin-facing side, with hot melt adhesive. The inner side sheets 91L, 91R are bonded to the top sheet 8 with hot melt adhesive, and the widthwise inner ends of this hot melt adhesive form fold lines 31LL, 31LR (see Figure 8), and the insides of the fold lines 31LL, 31LR form the upstanding inner leakage barrier walls 31L, 31R.

[0066] The inner side sheets 91L, 91R are located widthwise inward of the diaper 1 relative to the fixing regions 91LA, 91RA and have first fold lines 12 extending in the longitudinal direction of the diaper 1. The inner side sheets 91L, 91R are folded along the first fold lines 12 so that the part of the inner side of the diaper 1 widthwise from the first fold line 12 overlaps the part of the diaper 1 widthwise from the first fold line 12. The part of the inner side sheets 91L, 91R widthwise from the first fold line 12 is not bonded to the part of the diaper 1 widthwise from the first fold line 12, and can stand up toward the skin side.

[0067] When not folded along the first folding line 12, the widthwise inner sides of the inner side sheets 91L, 91R are free regions 91LB, 91RB that become the inner leakage barrier walls 31L, 31R, and near the ends of the free regions 91LB, 91RB, two rubber threads 31BL, 31BR, which are thread-like elastic members, are fixed with a hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. When the rubber threads 31BL, 31BR contract, the inner side sheets 91L, 91R, which are folded along the first folding line 12 and laminated on the skin-facing side, stand up, and the inner leakage barrier walls 31L, 31R stand up on the skin-facing side. When the inner leakage barrier walls 31L, 31R are upstanding, the ends of the free regions 91LB, 91RB become the tips on the skin-facing side. The inner leakage preventing walls 31L, 31R inhibit the movement of excreted liquids such as urine and loose stools outward in the width direction of the inner leakage preventing walls 31L, 31R, thereby suppressing lateral leakage of these.

[0068] The inner side sheets 91L, 91R may extend to both longitudinal ends of the diaper 1.

[0069] The outer leakage barrier walls 30L, 30R are disposed on the skin-facing sides on both widthwise sides of the diaper 1 and are formed by a pair of water-impermeable outer side sheets 90L, 90R extending in the longitudinal direction.

[0070] The outer side sheets 90L, 90R are arranged so that their longitudinal ends coincide with the longitudinal ends of the top sheet 8. The outer side sheets 90L, 90R have fixing regions 90LA, 90RA arranged on the widthwise outer sides. The fixing regions 90LA, 90RA are bonded to the inner side sheets 91L, 91R, the top sheet 8, the absorbent body 6, and the back sheet 5, which are components arranged on the non-skin-facing side, with hot melt adhesive. The outer side sheets 90L, 90R are bonded to the inner side sheets 91L, 91R or the top sheet 8 with hot melt adhesive, and the widthwise inner ends of this hot melt adhesive form fold lines 30LL, 30LR (see FIG. 8 ), and the insides of the fold lines 30LL, 30LR form the upstanding outer leakage barrier walls 30L, 30R. In other words, the fold lines 30LL, 30LR form the upstanding ends of the outer leakage barrier walls 30L, 30R.

[0071] The outer side sheets 90L, 90R are located widthwise inward of the fixing regions 90RA, 90LA of the diaper 1 and have second fold lines 13 extending in the longitudinal direction of the diaper 1. The outer side sheets 90L, 90R are folded along the second fold lines 13 so that the part of the outer side sheet 90L, 90R that is widthwise inward of the second fold line 13 overlaps the part of the outer side sheet 90L, 90R that is widthwise outward of the second fold line 13 of the diaper 1.

[0072] When not folded along the second fold lines 13, the widthwise inward sides of the outer side sheets 90L, 90R are free regions 90LB, 90RB that become the outer leakage barrier walls 30L, 30R, and near the ends of the free regions 90LB, 90RB, two rubber threads 30BL, 30BR, which are thread-like elastic members, are fixed with hot melt adhesive in a stretched state in the longitudinal direction of the diaper 1. The widthwise inner sides of the outer side sheets 90L, 90R near the longitudinal ends are also bonded to the top sheet 8, but the inner side of the longitudinal side is not bonded inward in the width direction with the hot melt adhesive, allowing it to stand up against the skin. As the elastic threads 30BL, 30BR contract, the outer side sheets 90L, 90R, which are folded along the second fold lines 13 and laminated on the skin-facing side, stand up, and the inner sides of the fold-back lines 30LL, 30LR stand up following suit, causing the outer leakage preventing walls 30L, 30R to stand up on the skin-facing side. When the outer leakage preventing walls 30L, 30R stand up on the skin-facing side, the ends of the free regions 90LB, 90RB become the tips on the skin-facing side. The standing outer leakage preventing walls 30L, 30R inhibit the movement of excreted liquids such as urine and loose stools outward in the width direction of the outer leakage preventing walls 30L, 30R, thereby suppressing lateral leakage of these substances.

[0073] The outer leakage barrier walls 30L, 30R stand upright along the widthwise inner edges of the fold lines 30LL, 30LR located at the widthwise center of the diaper 1. In the third embodiment, when the inner leakage barrier walls 31L, 31R and the outer leakage barrier walls 30L, 30R are upright, the free regions 90RB, 90LB of the outer leakage barrier walls 30L, 30R or the second fold line 13 are located on the skin-facing side of the ends of the free regions 91RB, 91LB of the inner leakage barrier walls 31L, 31R, as shown in Fig. 9(B). In this manner, the inner leakage barrier walls 31L, 31R stand upright to support the outer leakage barrier walls 30L, 30R, which allows the outer leakage barrier walls 30L, 30R to easily stand upright from the absorbent body 6 and to come into close contact with the wearer's skin.

[0074] The inner leakage barrier walls 31L, 31R are preferably provided in the crotch region 1B. The required height of the leakage barriers differs between the crotch region 1B and the front or back region 1F or 1R. For example, in the front and back regions 1F and 1R, the tapes 2R1, 2R2, 2L1, and 2L2 secure the diaper 1 to the wearer's abdomen and back when the diaper 1 is worn, so it is preferable to prevent the leakage barriers from rising up between the wearer and the diaper 1. On the other hand, the crotch region 1B is not secured to the diaper 1 so as to bring the diaper 1 into close contact with the wearer, and it is preferable to leave a gap between the diaper 1 and the wearer to ensure breathability. Therefore, in the crotch region 1B, the leakage barriers are required to rise up from the diaper 1 and be in close contact with the wearer's skin to prevent lateral leakage of excreted fluids such as urine. Therefore, it is preferable to provide the inner leakage barrier walls 31L, 31R in the crotch region 1B, support the outer leakage barrier walls 30L, 30R with the inner leakage barrier walls 31L, 31R, and ensure the height of the erected outer leakage barrier walls 30L, 30R. Furthermore, since the inner leakage barrier walls 31L, 31R do not erect on the sides of the front body region 1F and the back body region 1R, which are fixed to the abdomen and back of the wearer by the tapes 2R1, 2R2, 2L1, 2L2, the diaper 1 can be easily fitted to the wearer.

[0075] Substantially the entire longitudinal ends of the fold lines 30LL, 30LR of the outer side sheets 90L, 90R are bonded to the top sheet 8 with a hot melt adhesive, forming fixed parts 330L, 330R. The fixed areas 90LA, 90RA extend to both longitudinal ends of the outer side sheets 90L, 90R, so that the outer side sheets 90L, 90R are joined to the top sheet 8 over substantially the entire longitudinal ends. The absorbent body 6 is thick because it is composed of multiple laminated absorbent mats, and providing the fixed parts 330L, 330R at the locations overlapping the absorbent body 6 makes it difficult for the biasing force of the rubber threads 30BL, 30BR to be transmitted to the fixed parts 330L, 330R. If the fixing parts 330L, 330R are provided at locations where the absorber 6 does not extend, the fixing parts 330L, 330R can more easily follow the biasing force of the rubber threads 30BL, 30BR.

[0076] The features included in each of the embodiments and modifications thereof disclosed above can be combined with each other. [Explanation of symbols]

[0077] 1. Diapers 1F: Front body area 1B...Inseam area 1R: Back area 2F Front patch 2R･･Attached part 2L1, 2L2, 2R1, 2R2 tape 3W: Waist gather 3AL, 3AR Leg Gather 31L,31R・Inner leakage prevention wall 30L,30R・Outer leakage prevention wall 31LL, 31LR, 30LL, 30LR... Folded line 331L, 331R, 330L, 330R... Fixed part 31BL, 31BR, 30BL, 30BR, 4RB, 4LB, 9ER... Elastic thread 4. Cover sheet 4KL, 4KR... Constriction 5. Back seat 6. Absorber 6C··Absorbent Core 6A··Upper layer absorbent mat 6B Lower layer absorbent mat 6H·Groove 7. Core wrap sheet 8. Top sheet 9L, 9R side seats 91L, 91R: Inner side seat 90L, 90R outer side seat 91LA,91RA,90LA,90RA·Fixed area 91LB,91RB,90LB,90RB・Free area 10L,10R・Ear part 11. Permeate treatment section 12 First fold line 13 Second fold line

Claims

1. a length along a longitudinal direction corresponding to the front-to-back direction of the wearer; a length along a width direction perpendicular to the longitudinal direction; An absorber; a water-permeable sheet disposed on the wearer's skin side of the absorbent body; a pair of inner leakage preventing walls that are disposed on the outer sides in the width direction relative to the center in the width direction and that prevent the liquid discharged by the wearer from leaking outward in the width direction; a pair of outer leakage preventing walls arranged on the outer sides of the inner leakage preventing walls in the width direction, and preventing the liquid discharged by the wearer from leaking outward in the width direction, Absorbent articles.

2. the inner leak barrier is formed by an inner leak barrier-forming sheet that is disposed on the outer side in the width direction relative to the center in the width direction and has a first joining portion joined to the wearer's skin side of the water permeable sheet, the outer leak barrier wall is disposed on the outer side of the inner leak barrier in the width direction, and is formed by an outer leak barrier forming sheet having a second joining portion joined on the outer side of the width direction to the skin side of the water-permeable sheet, The absorbent article of claim 1.

3. the inner leak-proof wall has a first fold line extending in the longitudinal direction on the inner side of the first joint in the width direction, and is formed by folding along the first fold line so that the inner side of the first fold line in the width direction overlaps the outer side in the width direction, and standing up on the skin-facing side of the wearer, the outer leak-barrier wall has a second fold line extending in the longitudinal direction on the inner side in the width direction of the second joint portion, and is folded along the second fold line so that the inner side in the width direction of the second fold line overlaps with the outer side in the width direction, and is formed by standing up on the skin-facing side of the wearer. The absorbent article of claim 2.

4. when the inner leak preventing wall and the outer leak preventing wall are upright, an end of the outer leak preventing wall facing the wearer's skin or the second folding line is located on the wearer's skin side of an end of the inner leak preventing wall facing the wearer's skin, the outer leak-preventing wall stands upright along an inner end portion in the width direction of the second joint portion, The absorbent article of claim 3.

5. The first joint portion has a liquid-permeable treatment portion that has been subjected to liquid-permeable treatment. The absorbent article according to any one of claims 2 to 4.

6. The liquid-permeating treatment section has an opening. The absorbent article of claim 5.

7. The liquid-permeable treatment section has a non-joined section that is not joined to the water-permeable sheet on the non-skin-facing side of the wearer. The absorbent article of claim 5.

8. The liquid-permeable treatment portion is subjected to hydrophilic processing. The absorbent article of claim 5.

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