JP2012095790A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which has good stand-up stability of a leakproof wall and is excellent in lateral leakproof performance and liquid absorbability.SOLUTION: A leakproof wall 6 is erected in a form of loop shape with a hollow part 60 in an excretion part opposite area C. Joint parts 8, 9 of the leak proof wall 6 with an absorbent body 5 are arranged separately in the body width direction Y, a space 10 is formed between both joint parts 8, 9, and a hollow part 60 is communicated with an absorbent body storage part 40 via the space 10. A section view shape of the leakproof wall 6 along the body width direction Y is a shape that a lower part 6A1 of an inside part 6A along the body longitudinal direction X of the leakproof wall 6 can be in contact with a skin opposite face 1a of the absorbent body 5 when the leakproof wall 6 is pressed so as to squash the hollow part 60 toward the opposite side of the top part 6a of the loop from the top part 6a side. Opening holes 65 are formed in the lower part A1 to communicate the hollow part 60 with the outside of the leakproof wall 6 via the opening holes 65.

Description

  The present invention relates to absorbent articles such as disposable diapers, absorbent pads, sanitary napkins and the like.

  As an absorbent article of this type, a surface sheet disposed on the skin facing surface side, an outer layer sheet disposed on the non-skin facing surface side, and an absorbent body accommodated in an absorbent body accommodating portion interposed between both sheets are provided. What is equipped with a vertically long absorbent main body is known. Further, in the absorbent article having such a configuration, in order to prevent side leakage in which bodily fluids such as loose stool and menstrual blood being worn move in the width direction and leak from the side portion of the absorbent main body, There is known one provided with a leak-proof wall on each of both side portions in the longitudinal direction of the main body on the skin facing surface side. For example, in Patent Document 1, as a leak-proof wall, in a paper diaper having a barrier cuff formed by fixing an elastic elastic member extending in the longitudinal direction of the main body to a barrier sheet, between the elastic elastic member and the inner edge of the barrier sheet, It describes the formation of loose stool perforations. According to Patent Document 1, soft stool whose side leakage is prevented by the barrier cuff during the wearing of the paper diaper described in Patent Document 1 permeates into the barrier cuff from the permeation hole. Direct contact is suppressed.

  Moreover, in order to improve the fit of the leak-proof wall to the wearer, a loop-shaped leak-proof wall having a hollow portion is known. For example, in Cited Document 2, one side portion of the elastic sheet constituting the loop-shaped leak-proof wall having a hollow portion along the longitudinal direction of the main body is joined to the skin facing surface of the surface sheet, and the elastic sheet The other side portion is joined to the skin facing surface of the outer layer sheet (back surface sheet), and a space is formed between both the joint portions, and the hollow portion of the leak-proof wall and the absorbent body are accommodated through the space. An absorbent article (sanitary napkin) in communication with the part is described. According to Patent Document 2, the absorbent article described in Patent Document 2 has a high fit property and prevents warping and leakage prevention because the loop-shaped leak-proof wall having a hollow portion hardly causes discomfort when worn. Are better.

JP-A-3-186261 JP 2010-42058 A

  The paper diaper described in Patent Document 1 has a central wall surface that forms the barrier cuff by the body pressure of the wearer during wearing because the cross-sectional shape along the width direction of the main body of the barrier cuff (leak barrier) is substantially triangular. Since the stress is concentrated on the part, the barrier cuff is liable to be crushed and the standing stability of the barrier cuff is poor, so there is room for improvement in terms of preventing side leakage. Furthermore, since the barrier cuffs are crushed, the hole in the wall surface is blocked, and thus there is a problem that it is difficult for high-viscosity excretion fluid such as loose stool to pass through. Moreover, although the absorbent article described in Patent Document 2 has a certain effect for preventing lateral leakage of excretory fluid, the excretory fluid that is prevented from lateral leakage by the leak-proof wall and remains on the top sheet is the leak-proof wall. It collects in the vicinity of the inner side of the liquid and is difficult to be absorbed by the absorber, and there is room for improvement in terms of liquid absorbability.

  Accordingly, the problem of the present invention is that the leak-proof wall is hard to be crushed and has good standing stability because of the structure in which stress is hard to concentrate on a specific part of the leak-proof wall. An object of the present invention is to provide an absorbent article that is less likely to block pores and that is particularly excellent in highly viscous liquid absorbency.

  The present invention is a vertically long absorbent main body comprising a surface sheet that forms a skin facing surface, an outer layer sheet that forms a non-skin facing surface, and an absorber housed in an absorbent body housing portion interposed between both sheets; A leak-proof wall formed on each side of the main body in the longitudinal direction on the skin-facing surface side of the absorbent main body, the leak-proof wall having a hydrophobic stretchable sheet in the longitudinal direction of the main body The first and second joints extending in the direction are joined to the absorbent main body, and the stretchable sheet is joined to the absorbent main body at the front and rear of the excretory part-facing region. In the facing area, the loop-shaped standing wall has a hollow part, and in the leak-proof wall in the loop shape in the excretory part facing area, the first joint part and the second joint part are in the body width direction. Spaced apart and both joints A space is formed in the space, and the hollow portion of the leak-proof wall and the absorber housing portion are communicated with each other through the space, and the loop-shaped leak-proof wall in the body width direction of the loop-like portion in the excretory portion-facing region is provided. When the cross-sectional shape along which the leak-proof wall is pressed so as to crush the hollow part from the top side of the loop toward the opposite side of the loop, the lower part of the inner part of the leak-proof wall is It has a shape that can contact the skin-facing surface of the absorbent main body, and an opening is formed in the lower part of the inner part of the loop-shaped leak-proof wall in the excretory part-facing region. The problem is solved by providing an absorbent article in which the hollow portion of the leak wall communicates with the outside.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article excellent in fit and the dry feeling of a skin opposing surface is provided.

FIG. 1 is a view showing a disposable diaper which is an embodiment of the absorbent article of the present invention, and is a skin-facing surface side (surface sheet side) showing a state in which the elastic member of each part is expanded and expanded in a flat shape. It is a schematic plan view. 2 is a schematic perspective view of a cross section taken along the line II of FIG. 1 (a cross section along the body width direction). FIG. 3 is a schematic cross-sectional view along the main body width direction of the leak-proof wall in the disposable diaper shown in FIG. 1. FIG. 4 is a schematic side view of the inner part of the leak-proof wall in the disposable diaper shown in FIG. 1. FIG. 5A and FIG. 5B are explanatory diagrams of the absorption action of excretory fluid by the leak-proof wall in the disposable diaper shown in FIG. 6 (a), 6 (b), and 6 (c) are schematic cross-sectional views along the body width direction of another embodiment of the leak-proof wall according to the present invention, respectively. 7 (a), 7 (b), 7 (c), and 7 (d) are schematic cross-sectional views along the body width direction of still another embodiment of the leak-proof wall according to the present invention, respectively. is there. FIG. 8A, FIG. 8B, and FIG. 8C are schematic cross-sectional views along the body width direction of still another embodiment of the leak-proof wall according to the present invention, respectively. FIG. 9 is a view showing a sanitary napkin which is an embodiment of the absorbent article of the present invention, and shows a skin facing surface side (surface sheet side) showing a state where the elastic members of the respective parts are extended and expanded in a flat shape. FIG.

  Hereinafter, the absorbent article of the present invention will be described based on a disposable diaper which is a preferred embodiment thereof with reference to the drawings. The diaper 1A of the present embodiment is a so-called unfolded disposable diaper, and as shown in FIGS. 1 and 2, forms a liquid-permeable surface sheet 2 that forms the skin facing surface 1a and a non-skin facing surface 1b. A liquid-impermeable or water-repellent (hereinafter collectively referred to as “liquid-impermeable”) outer layer sheet 3 and an absorbent body 4 accommodated in an absorbent body accommodating portion 40 interposed between both sheets 2 and 3. The longitudinally long absorbent main body 5 and the leakage preventing walls 6 and 6 formed on both sides in the longitudinal direction X on the skin facing surface 1a side of the absorbent main body 5 are provided. The absorber housing portion 40 is a space in which the topsheet 2 and the outer layer sheet 3 are bonded to each other to form a space in which the absorber 4 is housed. This space is a housing portion for the absorber 4.

  In the present specification, the longitudinal direction is a direction along the long side of an absorbent article (for example, disposable diaper, sanitary napkin) or a component thereof (for example, an absorbent main body, a leak-proof wall), and the width direction is the longitudinal direction. It is a direction orthogonal to the direction. In the figure, the direction indicated by reference sign X is the longitudinal direction of the absorbent main body 5 (main body longitudinal direction), and the direction indicated by reference numeral Y is the width direction of the absorbent main body 5 (main body width direction). Further, the skin facing surface is a surface of the absorbent article or a component thereof that is directed to the wearer's skin when the absorbent article is worn, and the non-skin facing surface is an absorption in the absorbent article or a component thereof. It is a surface that is directed to the side opposite to the skin side (clothing side) when wearing the property article.

  As shown in FIG. 1, the diaper 1 </ b> A (absorbent main body 5) includes, in the longitudinal direction X, a back side portion A (rear region) disposed on the back side of the wearer when worn, and the wearer's ventral side when worn. And a crotch part C on which a wearer's crotch is arranged when worn. The crotch part C is an excretion part opposing area | region which opposes a wearer's excretion part at the time of wear, and is located in the center part of the longitudinal direction X of the diaper 1A (absorbent main body 5). The diaper 1A (absorbent body 5) is an hourglass in which both side edges of the crotch part C are curved inwardly in an arc shape, and the center part in the longitudinal direction X is inwardly bounded in a plan view as shown in FIG. It has a shape.

  Each of the top sheet 2, the outer layer sheet 3, and the absorber 4 has a vertically long shape that is long in one direction X. The top sheet 2 and the outer layer sheet 3 both extend in the longitudinal direction from the front and rear ends in the longitudinal direction X of the absorbent body 4 in the longitudinal direction X, and in these extending portions, a hot melt adhesive, They are joined together by known joining means such as heat sealing and ultrasonic sealing. On the other hand, with respect to the width direction Y, as shown in FIG. 2, the topsheet 2 has substantially the same length in the width direction Y as the absorbent body 4 and covers the entire skin facing surface of the absorbent body 4. On the other hand, the outer layer sheet 3 is wider than the top sheet 2, covers the entire area of the non-skin facing surface of the absorbent body 4, and further from the left and right side edges 4s, 4s along the longitudinal direction X of the absorbent body 4 in the width direction. Y extends outside. The extension portion of the outer layer sheet 3 from the absorber 4 is joined to the stretchable sheet 7 constituting the leak-proof wall 6 by the second joining portion 9 and other known joining means, and is composed of both sheets 3 and 7. Side flaps are formed.

  Laminated portions (the side flap portions) of the outer layer sheet 3 and the stretchable sheet 7 at the left and right side portions of the crotch C constitute a pair of leg portions arranged around the wearer's legs. As shown in FIG. 2, the thread-like leg elastic member 11 is stretched between the sheets 3 and 7 in each leg portion along the longitudinal direction X by a known joining means such as a hot-melt adhesive. Leg gathers are formed by the contraction of the leg elastic members 11 at the leg portions when being fixed. Further, waist elastic members 12 are arranged along the width direction Y at the waist portions (end portions in the longitudinal direction X) of the back side portion A and the abdominal side portion B to form waist gathers. The waist elastic member 12 has a belt-like shape, and is sandwiched and fixed between the top sheet 2 and the stretchable sheet 7 and the outer layer sheet 3 in a stretched state by a known joining means.

  Moreover, as shown in FIG. 1, a pair of fastening tapes 13 and 13 are provided on both side edges along the longitudinal direction X of the back side A of the diaper 1A. More specifically, the fastening tape 13 is disposed outside the width direction Y in each of the pair of left and right side flaps (the laminated portion of the outer layer sheet 3 and the elastic sheet 7) on each of the back side part A and the abdominal side part B. It is attached to extend. A fastening portion 14 made of a male member of a mechanical surface fastener is attached to the fastening tape 13. Further, a non-skin facing surface 1b of the ventral side B of the diaper 1A is formed with a to-be-attached region 15 made of a female member of a mechanical surface fastener. The to-be-attached area | region 15 is formed by joining and fixing the female member of a mechanical hook-and-loop fastener to the non-skin opposing surface of the outer-layer sheet | seat 3 with a well-known joining means, and can attach or detach the fastening part 14 of the fastening tape 13 freely. It can be fixed to.

  Below, the loop-shaped leak-proof wall 6 which is the main characteristic part of the diaper 1A of this embodiment is demonstrated. As shown in FIGS. 1 and 2, the leak-proof wall 6 is formed by absorbing a hydrophobic stretchable sheet 7 with a first joint 8 and a second joint 9 extending in the longitudinal direction X of the absorbent main body 5. 5, and the elastic sheet 7 is joined to the absorbent main body 5 at the front (abdominal side B) and the back (back side A) of the excretory part facing region (the crotch C), and the standing inhibition part 61 is joined. In the crotch portion C, it is formed in a loop shape having a hollow portion 60 and is erected.

  The leakage preventing wall 6 will be further described. In the diaper 1A of the present embodiment, as shown in FIGS. 1 and 2, the strip-like hydrophobic stretchable sheet 7 is in the longitudinal direction on the skin facing surface 1a of the absorbent main body 5. A loop-shaped leak-proof wall that is disposed and joined along the longitudinal direction X on both sides of X, and that has a hollow portion 60 that stands upright on the skin facing surface 1a side due to contraction of the stretchable sheet 7 6 is formed. Here, “standing” means a state where the uppermost portion (top portion 6 a) of the leak-proof wall 6 is positioned above the surface (skin facing surface) of the topsheet 2. The same applies to “standing” of the second leak-proof wall 20 described later.

  As shown in FIG. 2, the leak-proof wall 6 is located in the crotch part C (excretion region facing region) and the region located in the front and back thereof (the portions near the crotch part C of the back side portion A and the abdominal side portion B), The portion of the leak-proof wall 6 standing up in a loop shape is a wider area in the longitudinal direction X than the excretory part facing area. is there. On the other hand, in the longitudinal direction end part of the diaper 1A (absorbent main body 5) belonging to the back side part A and the abdominal side part B, the leak-proof wall 6 (elastic sheet 7) is opposed to the skin. The folded elastic sheet 7 is positively folded so as not to form a hollow loop projecting upright on the side of the surface 1a, and the folded elastic sheet 7 is publicly known such as hot melt adhesive, heat seal, ultrasonic seal, etc. These are joined to the absorptive main body 5 to form the standing inhibition portion 61 in which the standing of the leak-proof wall 6 is inhibited. The standing inhibition portion 61 also functions as a means for preventing leakage from the inside of each of the front side (site located on the abdominal side B) and the rear side (site located on the back side A) of the leak-proof wall 6. .

  The hydrophobic stretchable sheet 7 constituting the leak-proof wall 6 is a composite sheet provided with stretchability by the elastic member 73 in the diaper 1A of the present embodiment. As shown in FIGS. 1 to 3, the elastic sheet 7 includes a sheet 71 on the skin facing surface side, a sheet 72 on the non-skin facing surface side, and a plurality of elastic members 73 between the sheets 71 and 72. Is formed. The sheet 71 on the skin facing surface side and the sheet 72 on the non-skin facing surface side are one continuous hydrophobic sheet, and as shown in FIG. 3, a folding line L1 extending in the longitudinal direction X of the absorbent main body 5 Are folded in half to form sheets 71 and 72, and the sheets 71 and 72 are overlapped with each other. The sheets 71 and 72 overlapped with each other may be joined by a known joining means. The elastic sheet 7 is formed by connecting a plurality of thread-like elastic members 73 between the sheet 71 on the skin facing surface side and the sheet 72 on the non-skin facing surface side, which are overlapped with each other, by a known joining means. , 72 are arranged and fixed in an elongated state in the longitudinal direction X. As shown in FIG. 1, each of the plurality of elastic members 73 in the present embodiment is disposed over the entire length in the longitudinal direction X of the absorbent main body 5, but at least from the crotch part C (excretion part facing region). As long as it is long.

  In the stretchable sheet 7 in the present embodiment, three elastic members 73 are arranged between the hydrophobic sheets 71 and 72 so as to extend in the longitudinal direction X of the absorbent main body 5. As shown in FIG. 3, one of the three elastic members 73 is arranged on the top 6 a of the leak-proof wall 6 standing in a loop shape, and the other two are the leak-proof wall 6. One is arranged in each of the inner part 6A and the outer part 6B. With the top 6a as a boundary, the inner side in the width direction Y of the diaper 1A (absorbent main body 5) from the top 6a in the leakage preventing wall 6 is the inner portion 6A of the leakage preventing wall 6, and the diaper 1A from the top 6a. The outer side of the width direction Y of the (absorbent main body 5) is the outer portion 6B of the leak-proof wall 6.

  As shown in FIGS. 2 and 3, the leak-proof wall 6 (elastic sheet 7) is formed on the absorbent main body 5 at the first joint 8 and the second joint 9 extending in the longitudinal direction X of the absorbent main body 5. It is joined. The surface of the sheet 71 on the skin-facing surface side of the first joint 8 is one side of the longitudinal direction X of the stretchable sheet 7, more specifically, near the folding line L1 of the one hydrophobic sheet. It is formed by being bonded to the skin facing surface of the topsheet 2 constituting the absorbent main body 5. Further, the surface of the sheet 72 on the non-skin facing surface side of the second joint portion 9 is a portion that is spaced a predetermined distance outward in the width direction Y from the one side portion (near the folding line L1) of the elastic sheet 7. In the vicinity of the side edge 4 s of the absorbent body 4, it is formed by being joined to the skin facing surface of the outer layer sheet 3 constituting the absorbent main body 5. In this way, the belt-like stretchable sheet 7 is disposed and joined along the longitudinal direction X on the side in the longitudinal direction X of the absorbent main body 5. The leak-proof wall 6 having a looped portion having the portion 60 is formed.

  The 1st junction part 8 and the 2nd junction part 9 can each be formed by well-known joining means, such as a hot-melt-type adhesive agent, a heat seal, and an ultrasonic seal, similarly to the other junction part in the diaper 1A. . In the present embodiment, both joints 8 and 9 are formed of a hot melt adhesive. Both joints 8 and 9 are continuous over the entire length of the leak-proof wall 6 in the longitudinal direction X, respectively.

  As shown in FIGS. 2 and 3, in the loop-shaped leak-proof wall 6 in the crotch part C (excretion portion facing region), the first joint portion 8 and the second joint portion 9 are separated in the width direction Y. The space 10 is formed between the joint portions 8 and 9, and the hollow portion 60 of the leak-proof wall 6 and the absorber housing portion 40 communicate with each other through the space 10. The space 10 is continuous over the entire length of the leak-proof wall 6 in the longitudinal direction X, and is formed not only in the crotch part C but also in the front and back regions thereof. In each of the left and right side portions along the longitudinal direction X of the absorber housing portion 40, the absorber 4 is not disposed, and a pocket portion 41 made of a band-like space is formed in plan view. The pocket part 41 is located in this. The pocket portion 41 may be formed continuously over the entire length in the longitudinal direction X of the absorbent body accommodating portion 40, but is formed in the crotch portion C (excretion portion facing region), and the front and rear regions ( It is preferably not formed on the dorsal side A, ventral side B). Thus, by forming the pocket part 41 locally in the crotch part C, the excretion fluid such as loose stool taken into the pocket part 41 in the crotch part C is surrounded and absorbed by the absorber 4 from the front and rear and the side. For this reason, the absorber 4 can be absorbed more quickly. As will be described later, the pocket portion 41 is absorbed in the hollow portion 60 of the leak-proof wall 6 and before the absorbent 4 absorbs excretory fluid such as loose stool accommodated in the absorber accommodating portion 40 via the space 10. Can serve as a temporary storage.

  The cross-sectional view shape along the width direction Y of the loop-shaped leak-proof wall 6 in the crotch part C (excretion part opposing area | region) is a circular shape as shown in FIG. To explain further, the cross-sectional shape in the width direction Y of the loop-shaped leak-proof wall 6 in the crotch C is such that the leak-proof wall 6 is directed from the top 6a side of the loop to the opposite side (space 10 side) of the top 6a. The inner portion 6A extending in the longitudinal direction X of the leak-proof wall 6 (the inner side in the width direction Y of the diaper 1A relative to the top portion 6a) when pressed so as to crush the hollow portion 60 (see FIG. 5B). The lower portion 6A1 of the portion located in the shape is a shape that can come into contact with the skin facing surface 1a (surface sheet 2) of the absorbent main body 5, and a specific example thereof is a circular shape as shown in FIG. The lower portion 6A1 is a lower half region in the inner portion 6A of the loop-shaped leak-proof wall 6.

  The cross-sectional shape in the width direction Y of the leak-proof wall 6 standing up in a loop shape having the hollow portion 60 in the crotch part C is typified by a circular shape as shown in FIG. When the diaper 1A is worn, the leak-proof wall 6 standing in a loop shape is crushed by an external force such as a wearer's body pressure because the compression recoverability is high. Even if it is deformed (see FIG. 5B), after the external force is removed, it can be quickly restored to its original shape, and the standing stability of the leak-proof wall 6 is improved. Furthermore, since the buckling deformation of the leak-proof wall 6 does not occur, an opening 65 described later is not blocked, and the liquid permeability is unlikely to decrease. On the other hand, when the cross-sectional shape in the width direction Y of the leak-proof wall 6 is a triangular shape or a quadrangular shape such as the barrier cuff described in Patent Document 1, the apex constituting the barrier cuff compared to the circular shape or the like Since the stress is easily concentrated on the wall surface between them and buckling, the compression recovery property is poor, so that good standing stability cannot be obtained. Further, the wall surface constituting the barrier cuff is buckled, so that the opening is closed and the liquid permeability is lowered.

  The cross-sectional view shape of the leak-proof wall 6 in the width direction Y is represented by a circular shape as shown in FIG. The number and arrangement form of 73 and the joining form of the leak-proof wall 6 (elastic sheet 7) with the absorbent main body 5 are important. In this embodiment, as shown in FIGS. 2 and 3, regarding the number and arrangement of the elastic members 73, the top portion 6 a and the top portion of the leak-proof wall 6 standing in a loop shape having the hollow portion 60. A total of three elastic members 73 are disposed at a total of three positions spaced equidistant from the inner side and the outer side in the width direction Y from 6a, and the form of joining the leak-proof wall 6 to the absorbent main body 5 In the width direction Y of the leak-proof wall 6, the leak-proof wall 6 is joined to the absorbent main body 5 by two parallel first and second joints 8 and 9 extending in the longitudinal direction X. The cross-sectional shape along the cross section is a circular shape as shown in FIG. 3 to ensure good standing stability.

  In addition, the loop-shaped leak-proof wall 6 in the crotch part C (the excretory part facing region) has a cross-sectional view shape in the width direction Y having a specific shape typified by the circular shape as described above. As shown in FIG. 4, an opening 65 is formed in the lower portion 6A1 of the inner portion 6A, and the hollow portion 60 of the leak-proof wall 6 communicates with the outside through the opening 65. The opening 65 has an elliptical shape in plan view, penetrates the stretchable sheet 7 (sheets 71 and 72) in the thickness direction, and is formed at least in the lower part 6A1 of the leak-proof wall 6 in the crotch part C. ing. The opening 65 functions as a liquid-permeable hole that absorbs excretory fluid such as loose stool into the hollow portion 60 of the leak-proof wall 6.

  As shown in FIG. 4, the numerous openings 65 of the leak-proof wall 6 are arranged such that the positions of the individual openings 65 in the longitudinal direction X do not coincide with each other. Here, “the position in the longitudinal direction of each opening” means the position of the center P of each opening 65 in the direction along the longitudinal direction X of the absorbent main body 5. That is, two arbitrarily selected from a large number of apertures 65, and each of the two apertures 65 passes through the center P of the aperture 65 and extends in the standing height direction (vertical direction) of the leak-proof wall 6. When the straight line L3 is drawn, a large number of apertures 65 are arranged so that the two virtual straight lines L3 do not overlap each other. Even if the wearer's body pressure is applied to the leakage prevention wall 6 when the diaper 1A is worn, the arrangement form of the numerous openings 65 in the leakage prevention wall 6 is made different in the longitudinal direction X in this way. 65 becomes difficult to be crushed and the function of the opening 65 as a liquid-permeable hole is easily maintained.

  The loop-shaped leak-proof wall 6 in the crotch part C (the excretory part facing region) is shown in FIG. 3 in addition to the cross-sectional view shape in the width direction Y being a specific shape typified by the circular shape as described above. As described above, any one tangent L2 (two tangents L2 are shown in FIG. 3) on the outer surface of the lower portion 6A1 of the inner portion 6A and the skin-facing surface 1a of the absorbent main body 5 (of the topsheet 2) The angle θ formed with the skin facing surface) is preferably less than 90 °, particularly preferably 5 to 45 °. When the angle θ is less than 90 °, the lower part 6A1 of the inner part 6A in which the opening 65 is formed is absorbable when the loop-shaped leak-proof wall 6 is crushed by receiving the body pressure of the wearer. It is easy to come into contact with the skin facing surface 1 a (surface sheet 2) of the main body 5, whereby excretory liquid existing in the vicinity of the inner portion 6 </ b> A of the leak-proof wall 6 is passed through the opening 65 to the hollow portion 60 in the leak-proof wall 6. It becomes easy to absorb (see FIG. 5B).

  The function and effect of the leak-proof wall 6 according to the present embodiment will be described. The loop-shaped leak-proof wall 6 in the crotch part C has the above-described number and arrangement of the elastic members 73 and absorbability at the joint portions 8 and 9. By means of joining with the main body 5 and the like, the cross-sectional shape in the width direction Y is represented by a circular shape as shown in FIG. High stability and good standing stability. Moreover, since the inside of the leak-proof wall 6 becomes the hollow part 60, cushioning property is favorable and combined with favorable standing stability improves the fitting property of the diaper 1A.

  Moreover, the leak-proof wall 6 exhibits excellent lateral leakage prevention and liquid absorption not only for low-viscosity excretion fluid such as urine but also for high-viscosity excretion fluid such as loose stool. That is, when the diaper 1A is worn, excretion fluid such as loose stool is excreted on the surface sheet 2 at the center of the crotch part C (excretion region facing region), and part of the excretion fluid passes through the surface sheet 2 and the like. A leak-proof wall that takes a long time to do and rises in a loop shape having a hollow portion 60 in the crotch portion C when it flows in the width direction Y on the top sheet 2 without being absorbed by the lower absorbent body 4 6 dams up further flow of the excretory fluid in the width direction Y and prevents side leakage. FIG. 5A shows a state in which excretion fluid such as loose stool indicated by the symbol U is blocked by the leak-proof wall 6 and is present in the vicinity of the inner portion 6A of the leak-proof wall 6. When the leak-proof wall 6 is crushed by the external force F such as the body pressure of the wearer of the diaper 1A from the state shown in FIG. 5A, as shown in FIG. 5B, the lower part of the inner part 6A 6A1 falls to the excretion liquid U side in the vicinity thereof and comes into contact with the excretion liquid U. At this time, the excretory liquid U is in a state of being pressed by the external force F while being in contact with the lower portion 6A1, and leak-proof through a large number of apertures 65 formed in the lower portion 6A1 by the action of a pump. It is absorbed by the hollow part 60 of the wall 6.

  Thus, the excretory liquid U absorbed in the hollow portion 60 of the leak-proof wall 6 passes below the space 10 via the space 10 between the first joint portion 8 and the second joint portion 9 of the leak-proof wall 6. It is quickly accommodated in the pocket portion 41 of the absorber accommodating portion 40 located and is absorbed by the absorber 4. The pocket part 41 functions as a buffer tank that temporarily collects the excretory liquid, and effectively assists the liquid absorbing ability of the absorber 4. Due to the function and effect of the leak-proof wall 6, the diaper 1 </ b> A is particularly effective for high-viscosity excretory liquids such as soft stool, hardly causes side leakage, and has excellent liquid absorbability.

From the viewpoint of more surely exhibiting the operational effects of the leakage preventing wall 6 described above, it is preferable to set the dimensions and the like of each part of the leakage preventing wall 6 as follows.
The outer diameter R1 (see FIG. 5A) of the leak-proof wall 6 is preferably 10 to 50 mm, and more preferably 10 to 30 mm.
The standing height R2 (see FIG. 5A, standing height from the surface sheet 2) of the leak-proof wall 6 is preferably 10 to 50 mm, more preferably 25 to 30 mm.
The separation distance R3 (see FIG. 5A) between the first joint portion 8 and the second joint portion 9, that is, the length (width) R3 in the width direction Y of the space 10 is preferably 5 to 30 mm, more preferably 5 to 15 mm.
The length (width) R4 (see FIG. 5A) of the pocket portion 41 in the width direction Y is preferably 5 to 30 mm, and more preferably 5 to 15 mm.
The maximum diameter of the opening 65 (diameter when the opening 65 is circular, and long diameter when the opening 65 is elliptical as shown in FIG. 4) is preferably 0.5 to 10 mm, more preferably 2 to 5 mm.
The number of the apertures 65 is preferably 4 to 50, and more preferably 4 to 9, per 1 cm in the longitudinal direction X of the leak-proof wall 6.

  If the formation material of each part in 1 A of diapers is demonstrated, as the surface sheet 2 and the outer layer sheet | seat 3, the various things conventionally used in the said technical field can be used. As the surface sheet 2, various liquid-permeable sheet materials such as a nonwoven fabric and an apertured film can be used. As the outer layer sheet 3, various liquid impermeability such as a resin film having no moisture permeability, a resin film having fine holes and moisture permeability, a nonwoven fabric such as a water-repellent nonwoven fabric, and a laminate of these and other sheets. Or water repellent materials can be used. As the absorbent body 4, a fiber aggregate (may be a non-woven fabric) made of pulp fibers or the like; an absorbent core formed by holding particles of a water-absorbing polymer in the fiber aggregate is made of water-permeable thin paper or non-woven fabric. What is covered with a core wrap sheet; various known polymer sheets can be used.

  Examples of the hydrophobic sheets 71 and 72 constituting the leak-proof wall 6 (elastic sheet 7) include plastic films such as polyethylene and polypropylene; spunbonds using synthetic fibers such as polyethylene, polypropylene and polyethylene terephthalate. Nonwoven fabrics such as melt blow can be used. In particular, a multilayer nonwoven fabric of spunbond and meltblown using synthetic fibers made of polypropylene is preferred, and a spunbond / meltblown / spunbond (SMS) nonwoven fabric is preferred. Polypropylene is stable without buckling due to water absorption. By using SMS, it can be soft touched as a leak-proof wall of the absorbent article, has high compression recovery, and good standing stability can be obtained. Moreover, as the elastic member 73 which comprises the leak-proof wall 6 (elastic sheet | seat 7), the thread-like or strip | belt shape used as an elastic member in this kind of absorbent article can be especially used without a restriction | limiting.

  The leak-proof wall according to the present invention is not limited to the above-described embodiment, and various forms can be adopted without departing from the gist of the present invention. 6 to 8 show other embodiments of the leak-proof wall according to the present invention. In addition, regarding other embodiments (including the napkin 1B of FIG. 9) to be described later, constituent parts different from those of the above embodiment will be mainly described, and the same constituent parts will be denoted by the same reference numerals and description thereof will be omitted. The description of the above embodiment is applied as appropriate to components that are not particularly described. In addition, regarding other embodiments of the leak-proof wall described later, the configuration on the left side will be mainly described, and the configuration on the left side will be appropriately applied to the configuration on the right side unless otherwise specified.

  As shown in FIGS. 6 (a) to 6 (c), the loop-shaped leak-proof wall 6 in the crotch part C (excretion portion facing region) has a width direction of the diaper 1A rather than the outer side portion 6B (top portion 6a). A liquid-impermeable leak-proof film 75 may be disposed on a portion located on the outer side of Y). The leak-proof film 75 may be arranged on the leak-proof wall 6 other than the crotch part C. By disposing the leak-proof film 75 on the outer portion 6B of the leak-proof wall 6, the leak-proof property of the leak-proof wall 6 is further improved, and side leakage is more effectively prevented. In the leak-proof wall 6 shown to Fig.6 (a), the leak-proof film between the sheet | seat 71 of the skin opposing surface side and the sheet | seat 72 of the non-skin opposing surface side which comprise the leak-proof wall 6 (elastic sheet | seat 7). In the leak-proof wall 6 shown in FIG. 6B, a leak-proof film 75 is arranged on the surface of the sheet 71 to form the outermost layer of the leak-proof wall 6. In the leak-proof wall 6 shown in (c), a leak-proof film 75 is arranged on the surface of the sheet 72 to form the innermost layer of the leak-proof wall 6. In any of these three forms, the leak-proof film 75 is disposed on the lower half 6B1 of the outer portion 6B of the loop-shaped leak-proof wall 6, and a known sheet such as an adjacent sheet and a hot-melt adhesive is known. It is joined by joining means. As the leak-proof film 75, for example, a plastic film such as polyethylene or polypropylene, or a resin film having a fine hole using these resins and having moisture permeability can be used.

  Moreover, in the hollow part 60 of the loop-shaped leak-proof wall 6 in the crotch part C (excretion part opposing area | region), as shown to Fig.7 (a)-FIG.7 (d), in a hollow part rather than the hollow part 60, it is. It has a small hollow portion 21 with a small volume (when other members are contained in the hollow portion, it is the volume when other members are removed, meaning the volume that the hollow portion originally has). A second leak-proof wall 20 that stands in a loop shape may be disposed. The second leak-proof wall 20 may be arranged in the hollow part 60 of the leak-proof wall 6 other than the crotch part C. The hollow portion 60 of the leak-proof wall 6 is opened with a space 10 formed in the lower portion thereof, but the small hollow portion 21 of the second leak-proof wall 20 is closed at its lower portion and becomes a closed space. ing.

  The second leak-proof wall 20 shown in FIG. 7A and FIG. 7B is, like the leak-proof wall 6, a composite sheet provided with stretchability by a plurality (three) of elastic members 73 ( It is configured to include a belt-like stretchable sheet 22 that is separate from the stretchable sheet 7, which is a hydrophobic sheet. The stretchable sheet 22 is formed by folding one hydrophobic sheet in two along a folding line (not shown) extending in the longitudinal direction X and overlapping each other, and the entire stretchable sheet 22 has a two-layer structure. It has become. The superposed hydrophobic sheets in the stretchable sheet 22 are joined together by a known joining means such as a hot melt adhesive. As the stretchable sheet 22, the same sheet as the stretchable sheet 7 can be used. The stretchable sheet 22 may not be hydrophobic, but is preferably hydrophobic when the second leakproof wall 20 improves leakproofness.

  In the leak-proof wall 6 shown to Fig.7 (a), the state which the one side part and the other side part which are not illustrated extended in the longitudinal direction X of the elastic sheet 22 which comprises the 2nd leak-proof wall 20 were piled up mutually Thus, the diaper 1 (absorbent body 5) is disposed further outward in the width direction Y than the second joint portion 9 located on the outer side 6B side of the leak-proof wall 6, and the first joint portion 8 is positioned. It is not arranged on the inner side 6A side of the leak-proof wall 6 to be performed. The second leak-proof wall 20 is unevenly distributed on the outer portion 6B side of the leak-proof wall 6 due to such uneven distribution of the both sides of the stretchable sheet 22 toward the outer portion 6B side. The stretchable sheet 22 includes a second joining portion 9 and other known joining means between the stretchable sheet 7 (sheet 72 on the non-skin facing surface side) constituting the leak-proof wall 6 and the outer outer layer sheet 3B described later. It is clamped and fixed by. Thus, when the 2nd leak-proof wall 20 is unevenly distributed and arrange | positioned in the hollow part 60 of the leak-proof wall 6 at the outer side part 6B side, the leak-proof wall 6 will be by body pressure etc. during wearing of the diaper 1A. When crushed as shown in FIG. 5 (b), the second leak-proof wall 20 in the interior falls down so as to close the space 10 on the inner side of the diaper 1A. By such a fall-down operation of the second leak-proof wall 20, the excretory liquid in the hollow part 60 of the leak-proof wall 6 is pushed into the pocket part 41, thereby further improving the liquid absorbability. Further, the presence of the second leak-proof wall 20 improves the standing property of the leak-proof wall 6, and further improves the compression recovery property, so that the followability of the leak-proof wall 6 to the body is good. Become. In particular, good compression recovery of the leak-proof wall 6 can be obtained regardless of the number or size of the numerous openings 65 formed in the lower part 6A1 of the inner part 6A of the leak-proof wall 6.

  In the leak-proof wall 6 shown to Fig.7 (a), as for the 1st junction part 8, the surface of the sheet | seat 72 of the non-skin opposing surface side in the one side part of the longitudinal direction X of the elastic sheet 7 is an absorptive main body. 5 is formed by being bonded to the skin facing surface of the topsheet 2 constituting 5. The outer layer sheet 3 includes an inner outer layer sheet 3 </ b> A that is relatively close to the absorber 4 and an outer outer layer sheet 3 </ b> B that is relatively far from the absorber 4. The inner outer layer sheet 3A is slightly wider than the absorber 4, or substantially the same width as the absorber 4, and narrower than the outer outer layer sheet 3B, and covers the entire area of the non-skin facing surface of the absorber 4. . The inner outer layer sheet 3A, the absorber 4, and the outer outer layer sheet 3B may be joined by a known joining means such as a hot-melt adhesive. The inner outer layer sheet 3A and the outer outer layer sheet 3B may be the same or different in composition, thickness, characteristics, and the like.

  In the leak-proof wall 6 shown in FIG.7 (b), the point where the 2nd leak-proof wall 20 is unevenly distributed in the outer part 6B side of the leak-proof wall 6 is the leak-proof wall 6 shown in FIG. Although it is the same, the one side part which is not illustrated among the both side parts extended in the longitudinal direction X of the elastic sheet 22 which comprises the 2nd leak-proof wall 20 is the elastic sheet 7 (non-shown) which comprises the leak-proof wall 6 Between the sheet 72) on the skin facing surface side and the outer outer layer sheet 3B, the second joint portion 9 is sandwiched and fixed by other known joining means, and the other side portion 22A of the stretchable sheet 22 is connected to the stretchable sheet 7. It differs in that it is joined to the surface of the sheet 72 by a known joining means without being interposed between the outer outer layer sheet 3B.

  In the leak-proof wall 6 shown in FIG.7 (c) and FIG.7 (d), the 2nd leak-proof wall 20 is the elastic sheet 7 which comprises the leak-proof wall 6, ie, a plurality (three). It is comprised from the composite sheet (hydrophobic sheet | seat) provided with the elasticity by the elastic member 73, More specifically, it is comprised by folding back the elastic sheet 7 which comprises the leak-proof wall 6, The leak wall 6 and the second leak-proof wall 20 are integrally formed by one continuous stretchable sheet 7. Also in the leak-proof wall 6 shown in FIG.7 (c) and FIG.7 (d), the 2nd leak-proof wall 20 is unevenly distributed by the outer side part 6B side of the leak-proof wall 6. FIG.

  In the second leak-proof wall 20 shown in FIG. 7C, the skin facing surface side (outer surface side) of the leak-proof wall 20 forms the non-skin facing surface side (inner surface side) of the leak-proof wall 6. The non-skin-facing surface side (inner surface side) of the leak-proof wall 20 is formed by a sheet 71 that forms the skin-facing surface side (outer surface side) of the leak-proof wall 6. In the leak-proof wall 6 shown in FIG.7 (c), the one side part extended in the longitudinal direction X of the elastic sheet 7 which comprises the standing base end part of the 2nd leak-proof wall 20 which makes | forms a loop shape, and stands. 7A is bonded and fixed to the surface of the sheet 71 in the space 10 or the pocket portion 41 by a bonding means such as an adhesive.

  In the second leak-proof wall 20 shown in FIG. 7 (d), the skin-facing surface side (outer surface side) of the leak-proof wall 20 forms the skin-facing surface side (outer surface side) of the leak-proof wall 6. The non-skin facing surface side (inner surface side) of the leak-proof wall 20 is formed by a sheet 72 that forms the non-skin facing surface side (inner surface side) of the leak-proof wall 6. In the leak-proof wall 6 shown in FIG.7 (d), one side part 7A of the elastic sheet 7 is clamped and fixed between the elastic sheets 7 (sheets 72) which oppose.

  As shown in FIGS. 7 (c) and 7 (d), the leak-proof wall 6 and the second leak-proof wall 20 are composed of a single continuous stretchable sheet 7, thereby making the leak-proof wall material. The configuration can be simplified.

  On the other hand, as shown in FIGS. 7 (a) and 7 (b), each of the leak-proof walls 6 and the second leak-proof wall 20 is composed of separate elastic sheets 7 and 22, respectively. It is possible to give different characteristics to the leak walls 6 and 20, thereby further improving the characteristics of the leak-proof wall 6 as a whole. For example, as the stretchable sheet 22 constituting the second leak-proof wall 20, a highly repellent nonwoven fabric comprising synthetic fibers made of polyethylene terephthalate is used, and the stretchable sheet 7 constituting the leak-proof wall 6. As described above, it is possible to obtain the leak-proof wall 6 that is soft to the touch and has good compression recovery properties by using a flexible non-woven fabric including synthetic fibers made of polyethylene. Further, as the stretchable sheet 7 constituting the leak-proof wall 6, when using a non-woven fabric having a relatively large mesh to improve the uptake property of the highly viscous liquid, the stretchable sheet 22 constituting the second leak-proof wall 20. As described above, by using a relatively clogged non-woven fabric, it is possible to prevent the leakage preventing property of the leakage preventing wall 6 from being lowered as a whole. Further, the basis weight can be made different between the stretchable sheet 7 constituting the leak-proof wall 6 and the stretchable sheet 22 constituting the second leak-proof wall 20. For example, the stretchable sheet 7 is relatively Even when the stretchable sheet 22 has a relatively low basis weight and a relatively high basis weight, it is possible to obtain the leak-proof wall 6 that is soft to the touch and has good compression recovery.

  As shown in FIG. 8A, FIG. 8B, and FIG. 8C, the second leak-proof wall 20 may be configured to include the inner outer layer sheet 3A and / or the outer outer layer sheet 3B. good. Each of the second leak-proof walls 20 shown in FIGS. 8A to 8C is unevenly distributed on the outer portion 6 </ b> B side of the leak-proof wall 6. Sheets 3A and 3B constituting the second leak-proof wall 20 shown in FIGS. 8A to 8C are composite sheets to which stretchability is imparted by an elastic member 73 and are hydrophobic (liquid impermeable). ).

  The 2nd leak-proof wall 20 shown to Fig.8 (a) is comprised including the outer side outer layer sheet | seat 3B. The outer outer layer sheet 3B constituting the second leak-proof wall 20 is folded in two along a folding line L5 extending in the longitudinal direction X and overlapped with each other to form a two-layer structure, and is along the longitudinal direction X of the outer outer layer sheet 3B. Both side portions (not shown) are located outside the second bonding portion 9 in the width direction Y of the diaper 1A. In the lower part of the small hollow portion 21 of the second leak-proof wall 20, the opposing outer layer sheets 3B are joined together by a joining portion 25 formed by applying a hot melt adhesive, whereby the small hollow portion 21 is a closed space.

  The 2nd leak-proof wall 20 shown in FIG.8 (b) is comprised including 3 A of inner side outer layer sheets. The inner outer layer sheet 3A constituting the second leak-proof wall 20 is folded in two along a folding line L6 extending in the longitudinal direction X and overlapped with each other to form a two-layer structure, along the longitudinal direction X of the inner outer layer sheet 3A. Both side portions (not shown) are located more inward in the width direction Y of the diaper 1 </ b> A than the first joint portion 8. In the lower part of the small hollow portion 21 of the second leak-proof wall 20, the mutually facing inner outer layer sheets 3 </ b> A are joined together by the joint portion 25, whereby the small hollow portion 21 is a closed space.

  The second leak-proof wall 20 shown in FIG. 8C is configured to include the inner outer layer sheet 3A and the outer outer layer sheet 3B, and more specifically, includes the inner outer layer sheet 3A and is small. An outer leakage prevention wall 26 standing in a loop having a hollow portion 27, and an inner leakage prevention wall 28 that includes the outer outer layer sheet 3 </ b> B and is disposed in the small hollow portion 27 of the outer leakage prevention wall 26. The inner leakage prevention wall 28 is erected in a loop shape having a second small hollow portion 29. The volume in the hollow portion (space volume in the hollow portion) is, in descending order, the hollow portion 60, the small hollow portion 27, and the second small hollow portion 29. In the lower part of the second small hollow part 29, the outer outer layer sheets 3B facing each other are joined by the joint part 25, whereby the second small hollow part 29 is a closed space. The inner outer layer sheet 3A constituting the outer leak-proof wall 26 and the outer outer layer sheet 3B constituting the inner leak-proof wall 28 are each folded in two along a folding line (not shown) extending in the longitudinal direction X and overlapped with each other. It is a layered structure. The inner outer layer sheet 3A and the outer outer layer sheet 3B may be bonded to each other at a predetermined location by a known bonding means such as a hot-melt adhesive.

  The absorbent article of the present invention may be a pants-type disposable diaper, an absorbent pad, a sanitary napkin, or the like previously formed in a pants shape, in addition to a deployable disposable diaper having a fastening tape as shown in FIG. . FIG. 9 shows a sanitary napkin that is an embodiment of the absorbent article of the present invention.

  As shown in FIG. 9, the napkin 1 </ b> B of the present embodiment includes an absorbent body 4 accommodated in a top sheet 2, an outer layer sheet 3, and an absorbent body accommodating portion (not shown) interposed between both sheets 2 and 3. The longitudinally long absorptive main body 5 is provided, and leakage preventing walls 6 and 6 are formed on both side portions in the longitudinal direction X on the skin facing surface 1a side of the absorptive main body 5, respectively. The main configuration of the napkin 1B including the leak-proof wall 6 is substantially the same as that of the diaper 1A described above, and the section taken along the line II-II in FIG. 9 is not shown, but is a section along the width direction Y of the diaper 1A ( 2) and is substantially the same as the cross section of the diaper 1A shown in FIG. 2 in that the leg elastic member 11 is not provided and that a wing portion 16 and an embossed groove 17 described later are provided. Different.

  As shown in FIG. 9, the napkin 1 </ b> B is disposed on the stomach side of the wearer from the excretory part facing region C disposed opposite to the excretion part (vaginal opening) of the wearer when worn, and the excretion part facing region C when worn. The front region B and the rear region A disposed on the back side of the wearer from the excretory part facing region C when worn are in the longitudinal direction X. The excretory part opposing area | region C is a part which has a pair of wing parts 16 and 16 at right and left. The wing part 16 is located outside the absorbent body 4 in the width direction Y, and the laminated part (side flap part) of the outer layer sheet 3 and the elastic sheet 60 is outward in the width direction Y in the excretory part facing region C. It is further extended. A pair of embossed grooves 17 for fixing the topsheet 2 and the absorbent body 4 are formed on the skin facing surface 1a of the napkin 1B. The embossed grooves 17 extend in the longitudinal direction X on both sides of the napkin 1B. An adhesive is applied to a predetermined portion of a non-skin facing surface of the napkin 1B (not shown) (non-skin facing surface of the outer layer sheet 3) to form a shift stopper (not shown). The napkin 1B also has the same effect as the diaper 1A, and even a highly viscous excretory fluid such as menstrual blood is less likely to cause side leakage and has a high liquid absorbency.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. For example, in the above embodiment, the stretchable sheets 7 and 22 are formed by folding one hydrophobic sheet, but may be formed by laminating two hydrophobic sheets. All the parts of only the one embodiment described above can be used together as appropriate.

1A disposable diaper (absorbent article)
1B Sanitary napkin (absorbent article)
2 Surface Sheet 3 Outer Layer Sheet 3A Inner Outer Layer Sheet 3B Outer Outer Layer Sheet 4 Absorber 5 Absorbent Body 6 Leakage Wall 6a Leakage Wall Top 6A Leakage Wall Inner Portion 6B Leakage Wall Outer Portions 7 and 22 Elasticity Sheet 8 First joint 9 Second joint 10 Space 20 Second leak-proof wall 21 Small hollow part 26 of the second leak-proof wall Outer leak-proof wall 27 Small hollow part 28 of the outer leak-proof wall Inner leak-proof wall 29 2nd small hollow part 30 of inner side leak-proof wall 2nd outer layer sheet 40 Absorber accommodating part 41 Pocket part 60 Hollow part 61 of leak-proof wall Standing inhibition part 65 Opening 71 Sheet 72 on the skin facing surface side Non-skin Opposite surface side sheet 73 Elastic member 75 Leak-proof film A Back side (rear region)
B Ventral side (front region)
C Inseam (excretion area)
R1 Outer diameter of leak-proof wall R2 Standing height R3 of leak-proof wall Separation distance between first joint and second joint

Claims (5)

A vertically long absorbent main body comprising a top sheet that forms a skin facing surface, an outer layer sheet that forms a non-skin facing surface, and an absorbent body accommodated in an absorbent body accommodating portion interposed between both sheets, and the absorbent main body An absorbent article comprising a leak-proof wall formed on each side of the body in the longitudinal direction on the skin facing surface side,
The leak-proof wall joins the hydrophobic stretch sheet to the absorbent main body at the first joint portion and the second joint portion extending in the longitudinal direction of the main body, and the stretch sheet at the front and rear of the excretory portion facing region. Is formed by joining the absorbent main body, and in the excretory part facing region, standing up in a loop shape having a hollow part,
In the loop-shaped leak-proof wall in the excretory part facing region, the first joint part and the second joint part are spaced apart from each other in the body width direction, and a space is formed between both joint parts, The hollow portion of the leak-proof wall and the absorber housing portion communicate with each other through the space,
The cross-sectional view shape along the body width direction of the loop-shaped leak-proof wall in the excretory part-facing region is such that the leak-proof wall is crushed from the top side of the loop toward the opposite side of the loop. When pressed, the lower part of the inner part of the leak-proof wall is in a shape that can contact the skin-facing surface of the absorbent main body,
An opening is formed in the lower part of the inner part of the loop-shaped leak-proof wall in the excretory part facing region, and the hollow part of the leak-proof wall communicates with the outside through the hole. Absorbent article.   The absorbent article according to claim 1, wherein a liquid-impermeable leak-proof film is disposed on an outer side portion of the loop-shaped leak-proof wall in the excretory part facing region.   In the hollow portion of the loop-shaped leak-proof wall in the excretory portion-facing region, a second leak-proof wall standing in a loop shape having a small hollow portion, the volume of the hollow portion being smaller than the hollow portion. The absorptive article according to claim 1 or 2 arranged.   The absorptive article according to claim 3 in which said 2nd leak-proof wall is unevenly distributed in the outside part side of said leak-proof wall.   The outer layer sheet includes an inner outer layer sheet relatively close to the absorber and an outer outer layer sheet relatively far from the absorber, and the second leak-proof wall includes the inner outer layer sheet and / or the The absorbent article of Claim 3 or 4 comprised including the outer side outer layer sheet | seat.

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