JP2018086134A - Underpants type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fitness of leakproof walls while preventing a wearer from feeling discomfort in an underpants type disposable diaper having leakproof walls.SOLUTION: A underpants type disposable diaper (1) is provided with an absorbent body (10) and a pair of leakproof walls (50) which are provided on both sides in the horizontal direction of the absorbent body and stand on the skin side of the wearer when worn. The leakproof walls (50) have: contact parts (53) which have prescribed width in the horizontal direction and are in contact with the wearer's body when worn; a first inclined wall part (51) extending from an end part on one side in the horizontal direction of the contact parts (53) and from the other side in the horizontal direction of the contact parts and the wearer's non-skin side; and a second inclined wall part (52) extending from an end part on the other side in the horizontal direction of the contact part to one side of the horizontal direction of the contact parts and the wearer's non-skin side. The contact parts (53) have an area which is bonded to neither the first inclined wall part (51) nor the second inclined wall part (52) in the horizontal direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a pants-type disposable diaper.

  Conventionally, pants-type disposable diapers have been used. A general pants-type disposable diaper is provided with an absorptive main body having an absorptive core that has a longitudinal direction and a width direction and absorbs excrement in a deployed state. And the leak-proof wall part which prevents the excrement absorbed by the absorptive core from leaking to the outer side of a diaper is provided in the both sides of the width direction of this absorptive main body along a wearer's leg periphery. For example, in Patent Document 1, side flaps are provided on both sides of a liquid absorbent panel (absorbent body), and an elastic member such as rubber thread provided on the free end side of the side flaps contracts. Disposable diapers forming a gather (leakproof wall) are disclosed.

JP 2009-61052 A

  When wearing disposable diapers, if the absorbent core absorbs excrement and the weight increases, the absorbent body hangs down due to its own weight, creating a gap in the wearer's crotch (buttock) and around the legs There is a risk that excrement may leak outside through the opening. On the other hand, in the conventional diaper as described in Patent Document 1, as the absorbent main body hangs down, the position of the leak-proof wall shifts and the fit property deteriorates, or the leak-proof wall and the skin It is difficult to sufficiently suppress the occurrence of a gap between the two. In addition, if tightening by an elastic member provided on the leak-proof wall so as not to cause a gap is generated, there is a concern that the wearer may feel uncomfortable.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a leak-proof wall in a pants-type disposable diaper having a leak-proof wall while making it difficult for the wearer to feel discomfort. It is to improve the fit.

The main invention for achieving the above-mentioned object has a longitudinal direction and a transverse direction intersecting the longitudinal direction, and absorbs excrement on both sides in the transverse direction of the absorbent body. A pants-type disposable diaper provided with a pair of leak-proof walls standing on the skin side of the wearer when worn, wherein the leak-proof wall has a predetermined width in the lateral direction; From the abutting portion that abuts the wearer's body when worn, and the one end in the lateral direction of the abutting portion, the other side of the abutting portion in the lateral direction and the non-wearing state of the wearer A first inclined wall portion extending to the skin side, and a second extending from one end in the lateral direction of the contact portion to the non-skin side of the wearer from the other end portion in the lateral direction of the contact portion. And the abutting portion is in contact with either the first inclined wall portion or the second inclined wall portion in the lateral direction. It has an area which is not a pants-type disposable diaper, characterized in that.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  ADVANTAGE OF THE INVENTION According to this invention, in the underpants type disposable diaper which has a leak-proof wall, the fit property of a leak-proof wall can be improved, making it difficult to give a discomfort to a wearer.

It is a top view of the diaper 1 which is an unfolded and extended state. It is the schematic perspective view which looked at the diaper 1 from the ventral side. It is an AA schematic sectional drawing in FIG. It is a cross-sectional schematic diagram explaining the structure of the leak-proof wall. It is a top view of the leak-proof wall 50 which is the expansion | deployment and expansion | extension state. 6A to 6C are schematic cross-sectional views for explaining a method for forming the leak-proof wall 50. Drawing 7A is a figure explaining the wearing state of diaper 100 (comparative example) before excretion is performed. FIG. 7B is a diagram illustrating a wearing state of the diaper 100 (comparative example) after excretion is performed. FIG. 8A is a diagram illustrating a wearing state of the diaper 1 before excretion is performed. Drawing 8B is a figure explaining the wearing state of diaper 1 after excretion is performed. FIG. 9A and FIG. 9B are diagrams illustrating an example where the leak-proof wall 50 does not include the first inclined wall portion 51 and the second inclined wall portion 52. 10A and 10B are views for explaining the force acting on the contact portion 53 via the first inclined wall portion 51 (second inclined wall portion 52) of the leak-proof wall 50. FIG. It is a cross-sectional schematic diagram showing the modification of the leak-proof wall 50. FIG.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An absorbent body having a longitudinal direction and a transverse direction intersecting with the longitudinal direction and absorbing excrement; provided on both sides of the absorbent body in the lateral direction; A pants-type disposable diaper comprising a pair of leak-proof walls standing on the side, wherein the leak-proof wall has a predetermined width in the lateral direction and is worn against the wearer's body when worn. A first abutting wall portion that extends from one end in the lateral direction of the abutting portion to the other side in the lateral direction of the abutting portion and the non-skin side of the wearer; A second inclined wall portion extending from one end in the lateral direction of the contact portion to one side in the lateral direction of the contact portion and the non-skin side of the wearer, and the contact The portion has a region that is not joined to either the first inclined wall portion or the second inclined wall portion in the lateral direction. Pants-type disposable diapers to be.

  According to such a pants-type disposable diaper, the triangle formed by the contact portion, the first inclined wall portion, and the second inclined wall portion is formed, so that the absorbent main body absorbs excrement and the like and becomes heavy. It is restrained that the load concentrates and acts on one place (particularly the central portion in the lateral direction) of the contact portion, and the contact portion can easily maintain a planar shape. Thereby, the plane formed by the contact portion fits snugly on the wearer's body, making it difficult for the wearer to feel uncomfortable, and suppressing the formation of a gap in the crotch portion.

  In such a pants-type disposable diaper, the leak-proof wall is joined to ends of the first inclined wall portion and the second inclined wall portion, and supports the first inclined wall portion and the second inclined wall portion. It is desirable to have a supporting wall portion.

  According to such a pants-type disposable diaper, the load due to the weight increase of the absorbent main body is distributed to the first inclined wall portion and the second inclined wall portion joined to the support wall portion, and the lateral direction of the contact portion It will act on both ends. That is, since the load acts on both end portions in the lateral direction of the contact portion, the contact portion easily maintains a planar shape. Thereby, fit property can be improved, making it difficult to give a wearer discomfort at the time of diaper wear.

  In such a pants-type disposable diaper, it is desirable that the contact portion is not joined to either the first inclined wall portion or the second inclined wall portion in the laterally central portion.

  According to such a pants-type disposable diaper, a triangle is formed by the contact portion, the first inclined wall portion, and the second inclined wall portion, and the downward force (load) transmitted from the support wall portion is efficient. It becomes easy to suppress that it concentrates and acts on one place of a contact part. This makes it easier for the contact portion to maintain a planar shape and makes it easier to fit the wearer's body with the surface.

  In such a pants-type disposable diaper, it is desirable that a plurality of elastic members along the longitudinal direction of the absorbent main body are arranged at the abutting portion at predetermined intervals in the lateral direction.

  According to such a pants-type disposable diaper, when the diaper is worn, the contraction force by the elastic member acts on the surface of the contact portion, so that the contact portion maintains the surface shape on the wearer's body. It will be easier to fit on the surface. In addition, since the contraction force due to the plurality of elastic members is dispersed and the contact pressure acting on the wearer's skin as a whole is increased, local pressure is unlikely to act on the wearer's skin, and diapers are attached. It is possible to prevent the comfort from getting worse or hurting the skin. Thereby, fitting property can be improved more while making it difficult to give discomfort to the wearer.

  In such a pants-type disposable diaper, it is desirable that the plurality of elastic members are arranged at an equal pitch in the lateral direction.

  According to such a pants-type disposable diaper, a uniform stretch force (a contraction force in the longitudinal direction by the elastic member) tends to act on the surface of the contact portion as a whole, and the contact portion is bent or bent. It becomes easy to suppress. Therefore, when the diaper is worn, the contact portion can be more easily maintained in a planar shape, and the contact portion can be easily fitted to the wearer's body in a planar shape.

  In such a pants-type disposable diaper, in the region where the plurality of elastic members are arranged in the lateral direction, the abutment portion, the first inclined wall portion, and the second inclined wall portion are joined. It is desirable not to.

  According to such a pants-type disposable diaper, in the region where the contracting force by the elastic member is acting, the number of stacked sheet members at the contact portion is constant, and the rigidity difference is easily kept constant. Accordingly, a difference in contraction force acting on the contact portion is unlikely to occur, and the contact portion can easily maintain a planar shape. Thereby, it becomes easy to fit a contact part on a wearer's body planarly.

  In such a pants-type disposable diaper, it is desirable that a first auxiliary sheet is laminated and provided on the non-skin side of the contact portion.

  According to such a pants-type disposable diaper, the rigidity of the contact portion can be increased throughout. Therefore, the contact portion is not easily bent or bent, and the planar shape is easily maintained. Thereby, it becomes easy to fit a contact part on a wearer's body planarly.

  In such a pants-type disposable diaper, it is desirable that a second auxiliary sheet different from the first auxiliary sheet is provided on the skin side of the contact portion.

  According to such a pants-type disposable diaper, the rigidity is further increased and the planar shape is more easily maintained. In addition, since the skin side surface of the contact portion is a part that directly contacts the wearer's body when the diaper is worn, the touch of the leak-proof wall is improved by appropriately selecting the material of the second auxiliary sheet. Can be made.

  In such a pants-type disposable diaper, the length of the first inclined wall portion in the inclination direction and the length of the second inclined wall portion in the inclination direction are larger than the length of the contact portion in the lateral direction. It is desirable that the length be too long.

  According to such a pants-type disposable diaper, the force by which the abutting portion is compressed to the center side in the lateral direction by the first inclined wall portion and the second inclined wall portion is reduced, and the abutting portion is bent or bent. It becomes easy to suppress (buckling). Thereby, it becomes easy for the contact part to maintain a planar shape.

=== Embodiment ===
<Basic configuration of diaper 1>
As an example of the absorbent article handled in the present embodiment, a basic configuration of a pants-type disposable diaper 1 (hereinafter also referred to as “diaper 1”) will be described. FIG. 1 is a plan view of the diaper 1 in an unfolded and extended state. FIG. 2 is a schematic perspective view of the diaper 1 viewed from the ventral side. 3 is a schematic cross-sectional view taken along the line AA in FIG. In addition, the "elongation state" in FIG. 1 is the state which extended the product (diaper 1) thoroughly, specifically, the dimension of each member (for example, back sheet 30 etc. mentioned later) which comprises the diaper 1 It means a state in which it has been extended to a length that matches or is close to the dimension of the member itself.

  The diaper 1 has a vertical direction, a horizontal direction, and a front-rear direction as three directions orthogonal to each other in the pant-type state of FIG. And in the following, the one side and the other side in the vertical direction in this pants-type state are also referred to as the “trunk opening side” and the “inseam side”, respectively, and the front side and the back side in the front-rear direction are respectively Also called “ventral” and “dorsal”.

  On the other hand, in the developed state of FIG. 1, the diaper 1 has a longitudinal direction and a width direction as three directions orthogonal to each other. In the following description, the one side and the other side in the longitudinal direction in the developed state are also referred to as “abdominal side” and “back side”, respectively. In addition, said width direction in the expansion | deployment state is the same direction as said horizontal direction in a pants type state. Therefore, in the following, the width direction is also referred to as “lateral direction”. Moreover, the longitudinal direction of the unfolded state is a direction along the longitudinal direction of the pants-type state. In addition, as shown in FIG. 3, the direction perpendicular to the longitudinal direction (longitudinal direction) and the lateral direction (width direction) is referred to as the “thickness direction”, and the side in contact with the skin of the wearer is referred to as the “skin side”. The opposite side is referred to as the “non-skin side”.

  Moreover, the diaper 1 has the abdominal side waistline part 3, the back side waistline part 4, and the crotch part 5 in a longitudinal direction, as shown in FIG. The ventral waist part 3 is a part located on the wearer's ventral side when the diaper 1 is worn. The back waistline portion 4 is a portion located on the wearer's back side when the diaper 1 is worn. A crotch part 5 is provided between the ventral waist part 3 and the back waist part 4.

  The diaper 1 of the present embodiment includes an absorbent main body 10, a top sheet 20, a back sheet 30, and a leak-proof wall 50. 1, the absorbent main body 10 is folded in two at a predetermined position CL10 in the longitudinal direction (longitudinal direction) of the absorbent main body 10, and the antinodes opposed to each other in the folded state. When the side waistline part 3 and the back side waistline part 4 are joined at the abdominal side edge part 3es and the back side edge part 4es using joining means such as welding or adhesion, the waist parts 3 and 4 are annular. Thus, the pants-type diaper 1 is formed in which the waist opening BH and the pair of leg openings LH and LH as shown in FIG. 2 are formed.

  The absorptive main body 10 has a function of absorbing excrement such as urine, has a substantially rectangular shape in a plan view as shown in FIG. 1, and has a longitudinal center along the longitudinal direction of the diaper 1 and a lateral center. Is arranged. The absorptive main body 10 has a liquid absorptive absorbent core 11 and a core wrap sheet 12 that covers the outer peripheral surface of the core 11 (see FIG. 3). In addition, leak-proof walls 50 are provided on both sides of the absorbent main body 10 in the lateral direction. Details of the leak-proof wall 50 will be described later.

  The absorbent core 11 is formed by molding liquid absorbent fibers such as pulp fibers into a predetermined shape, and a superabsorbent polymer (so-called SAP) or the like is mixed therein. In this embodiment, the absorptive core 11 has a substantially hourglass shape in plan view, and has a concave portion 11c whose central portion in the longitudinal direction is recessed inward in the lateral direction. That is, the absorbent core 11 has a recessed portion 11c having a lateral dimension smaller than both ends 11ea and 11eb in the longitudinal direction of the absorbent core 11 at a position between both ends 11ea and 11eb in the longitudinal direction. Yes. The core wrap sheet 12 is a liquid-permeable sheet member that covers the outer peripheral surface of the absorbent core 11, and tissue paper, nonwoven fabric, or the like can be used.

  The top sheet 20 is a liquid-permeable sheet member that is disposed on the skin side in the thickness direction of the absorbent main body 10 and comes into contact with the wearer's skin when the diaper 1 is worn. The top sheet 20 of the present embodiment is formed of, for example, an air-through nonwoven fabric or a spunbond nonwoven fabric.

  The back sheet 30 is a sheet member that is disposed on the non-skin side in the thickness direction of the absorbent main body 10 and constitutes the outer layer of the diaper 1. In the present embodiment, the back sheet 30 includes a back film 31, an upper outer layer sheet 32, and a lower outer layer sheet 33. The back film 31 is a liquid-impermeable and moisture-permeable sheet member disposed on the non-skin side of the absorbent main body 10, and is formed of, for example, a resin film. Providing the back film 31 suppresses movement (penetration) of moisture such as urine absorbed by the absorbent main body 10 toward the wearer's clothes.

  The upper outer layer sheet 32 and the lower outer layer sheet 33 are flexible sheet-like members that are arranged on the non-skin side of the back film 31 while being stacked in the thickness direction, and are formed of, for example, a spunbond nonwoven fabric. The upper outer layer sheet 32 and the lower outer layer sheet 33 have the same shape at least in the ventral waist part 3 and the back waist part 4, and as a whole have a substantially hourglass shape as shown in FIG. That is, the back seat 30 has a recess 30c between the ventral waist part 3 and the back waist part 4 in which the central part (crotch part 5) in the longitudinal direction is recessed inward in the lateral direction.

  In addition, an elastic member such as rubber thread is provided between the upper outer layer sheet 32 and the lower outer layer sheet 33 in the thickness direction. In the present embodiment, as shown in FIG. 1, a plurality of ventral waist elastic members 35 a have a predetermined expansion ratio in the belly waist region 3 of the diaper 1 (region between the stomach side edge portions 3 es and 3 es). Thus, the upper outer layer sheet 32 and the lower outer layer sheet 33 are sandwiched and joined in a state of being stretched in the horizontal direction. By this abdominal waistline elastic member 35a, lateral stretchability is imparted to the abdomen waistline part 3 of the diaper 1. Similarly, in the back side waistline part 4 (area between the back side edge parts 4es, 4es) of the diaper 1, the plurality of back side waistline elastic members 35b are extended in the lateral direction at a predetermined extension magnification. It is joined between the outer layer sheet 32 and the lower outer layer sheet 33. By this back side waistline elastic member 35b, the stretchability in the horizontal direction is imparted to the back side waistline portion 4 of the diaper 1.

  The “elongation magnification” of the elastic member indicates the degree of elongation when the natural length of the elastic member (thread rubber) is 1. For example, when the expansion magnification is 1.2, the elastic member is natural. This means that the length has been extended by 0.2.

  Further, the back waistline portion 4 is provided with a plurality of back side leg elastic members 35lg. The back-side leg-hole elastic member 35lg is arranged so as to be curved along the recessed portion 30c from the inner region in the longitudinal direction of the back-side waist portion 4 (position closer to the center in the longitudinal direction of the absorbent core 11). Specifically, as shown in FIG. 1, the back leg-hole elastic member 35 lg is a straight line arranged along the lateral direction in the lateral center (region where the absorbent core 11 is arranged). 35 lgs, and a curved portion 35 lgc arranged so as to bend obliquely upward from the lateral sides of the straight portion 35 lgs toward the outer side in the lateral direction. The straight portion 35lgs and the curved portion 35lgc are joined between the upper outer layer sheet 32 and the lower outer layer sheet 33 in a state of being stretched at different stretching magnifications.

  In the present embodiment, the back leg-hole elastic member 35lg is arranged so that the extension magnification in the linear portion 35lgs is lower than the extension magnification of the back waistline elastic member 35b. Since the straight portion 35lgs has a portion that overlaps the absorbent core 11 (absorbent body 10) in the central portion in the lateral direction, the absorbent core 11 is excessive in the lateral direction by reducing the expansion ratio. Can be prevented from shrinking. The expansion magnification may be different depending on the horizontal position of the linear portion 35lgs. For example, the expansion ratio at the central portion in the horizontal direction of the straight portion 35lgs may be lower than the expansion magnification at both ends in the horizontal direction. Thereby, a gradient is generated in the stress in the straight portion 35 lgs, and the shrinkage of the absorbent core 11 can be suppressed without impairing the fit.

  On the other hand, the expansion ratio of the curved portion 35lgc is arranged to be higher than the expansion ratio of the back waistline elastic member 35b. The curved portion 35lgc is disposed along the recessed portion 30c on the back side of the diaper 1. This region abuts against the wearer's buttocks when the diaper 1 is worn, and the wearer moves the leg to shift the position. It is a part that tends to occur. Therefore, by increasing the expansion magnification of the curved portion 35lgc, the contraction force is increased to make it difficult to cause a positional shift. Moreover, since the shrinkage | contraction amount of the back seat | sheet 30 becomes large in the vicinity of the leg periphery opening LH, the back seat | sheet 30 becomes easy to deform | transform into the shape along the roundness of a wearer's buttocks, and can improve fitting property. Similar to the straight line portion 35lgs, the expansion magnification may be different in the lateral direction of the curved portion 35lgc. For example, in the bending portion 35lgc, the expansion ratio may be higher on the outer side than on the inner side in the horizontal direction.

<Leakage barrier 50>
Next, the leakage barrier 50 will be described. The leak-proof walls 50 are disposed along the longitudinal direction of the absorbent main body 10 (the vertical direction of the diaper 1) on both lateral sides of the absorbent main body 10, and from the side end of the absorbent main body 10 when the diaper 1 is worn. It stands up and it suppresses that excrement leaks to the outside of diaper 1. FIG. 4 is a schematic cross-sectional view for explaining the structure of the leak-proof wall 50. 4 corresponds to an enlarged view of region B in FIG. FIG. 5 is a plan view of the leak-proof wall 50 in the unfolded and extended state. 6A to 6C are schematic cross-sectional views for explaining a method for forming the leak-proof wall 50.

  As shown in FIG. 4, the leak-proof wall 50 in the present embodiment stands up on the skin side of the wearer, and supports the first inclined wall portion 51, the second inclined wall portion 52, the contact portion 53, and the support And wall portion 54. The contact part 53 has a predetermined width in the lateral direction, and is a part that contacts the wearer's body (buttock) when the diaper 1 is worn. The first inclined wall portion 51 extends from one end in the lateral direction of the contact portion 53 (inside in the lateral direction in FIG. 4) to the other side in the lateral direction (outside in the lateral direction) and the non-skin of the wearer. It is a site extending to the side. On the other hand, the second inclined wall portion 52 extends from the end portion on the other side in the lateral direction of the contact portion 53 (outside in the lateral direction in FIG. 4) to the other side in the lateral direction (inner side in the lateral direction) and It is a site extending to the non-skin side. And the 1st inclination wall part 51, the 2nd inclination wall part 52, and the contact part 53 form a triangle (this embodiment isosceles triangle) like FIG. In addition, the support wall portion 54 supports the first inclined wall portion 51, the second inclined wall portion 52, and the contact portion 53 while standing on the wearer's skin side from both lateral sides of the absorbent main body 10. It is.

  The leak-proof wall 50 of the diaper 1 is a folded sheet member 50s obtained by bending a rectangular sheet member 50s in the lateral direction at predetermined positions f1 to f5 in the lateral direction in the unfolded state as shown in FIG. It is formed by joining a part of. As the sheet member 50 s forming the leak-proof wall 50, for example, a flexible sheet member such as a nonwoven fabric can be used. In addition, the leak-proof wall 50 is provided with a plurality of leak-proof wall elastic members 55 such as thread rubber that can expand and contract in the longitudinal direction. In the example of FIG. 5, four leak-proof wall elastic members 551 to 554 along the longitudinal direction are arranged side by side from the outer side to the inner side in the horizontal direction. The leak-proof wall elastic members 551 to 554 are joined to the leak-proof wall 50 in a state of being stretched at a predetermined stretch ratio in the longitudinal direction. The leak-proof wall elastic member 55 gives the leak-proof wall 50 stretchability along the longitudinal direction, making it easy to stand the leak-proof wall 50 when the diaper 1 is worn, and keeping the contact portion 53 in a flat shape. be able to.

  In addition, as for the arrangement space | interval in the horizontal direction of the leak-proof wall elastic members 551-554, it is desirable that it is constant. In other words, the leak-proof wall elastic members 551 to 554 are desirably provided at equal pitches in the lateral direction. Although details will be described later, by providing the leak-proof wall elastic members 55 at an equal pitch, uniform contraction force is easily applied over the entire region of the contact portion 53, and the contact portion 53 is worn when the diaper 1 is worn. Can be easily maintained in a planar shape. In addition, as for the pitch in the horizontal direction of the leak-proof wall elastic member 55, it is desirable to set it as 3 mm or more and 10 mm or less.

  In the present embodiment, the leak-proof wall elastic member 55 exhibits stretchability in the longitudinal direction at least in the range indicated by the broken line in FIG. However, the leak-proof wall elastic member 55 that does not exhibit stretchability may exist in a region outside in the longitudinal direction (longitudinal direction) from the range indicated by the broken line in FIG. Further, the number and arrangement of the leak-proof wall elastic members 55 are not limited to those described above, and can be appropriately changed according to the size and shape of the diaper 1.

  As shown in FIG. 6A, in the unfolded state, the lateral inner end portion 50ei of the leak-proof wall 50 (sheet member 50s) is formed between the absorbent main body 10 and the back film 31 (back sheet 30) in the thickness direction. It is joined and fixed in between. On the other hand, the lateral outer end 50eо of the leak-proof wall 50 (sheet member 50s) projects outward in the lateral direction of the absorbent main body 10. 6A, predetermined positions f1 to f5 in the horizontal direction are set on the sheet member 50s, and the leakage preventing wall 50 is formed by sequentially bending the sheet member 50s in the horizontal direction at these predetermined positions. .

  A region between the predetermined positions f1 and f2 in the lateral direction in the sheet member 50s is a region where the first inclined wall portion 51 is formed. The distance between the predetermined positions f1 and f2 in the horizontal direction is represented by L51. Similarly, the region between the predetermined positions f3 and f4 in the horizontal direction is a region forming the second inclined wall portion 52, and the distance between the predetermined positions f3 and f4 in the horizontal direction is represented by L52. . Further, the region between the predetermined positions f2 and f3 in the horizontal direction is a region where the contact portion 53 is formed, and the distance between the predetermined positions f2 and f3 in the horizontal direction is represented by L53. Further, a region between the predetermined positions f4 and f5 in the lateral direction is a region where the support wall portion 54 is formed.

  When forming the leak-proof wall 50, first, the leak-proof wall elastic members 551 to 554 are arranged in the longitudinal direction on the skin side surface of the unfolded sheet member 50s. In the present embodiment, the leak-proof wall elastic members 551 to 554 are arranged at equal intervals between the predetermined positions f2 and f3 in the lateral direction. And it arrange | positions so that the auxiliary sheet | seat 61 may be laminated | stacked from the upper side of the thickness direction of the part in which the leak-proof wall elastic members 551-554 are arrange | positioned, and it joins. In other words, the leakage preventing wall elastic members 551 to 554 are joined between the sheet member 50 s and the auxiliary sheet 61 in the thickness direction. The leak-proof wall elastic members 551 to 554 are joined to the sheet member 50s (auxiliary sheet 61) by an adhesive or the like applied to the surface of the leak-proof wall elastic member 55, but the sheet member 50s (auxiliary sheet 61). The adhesive may be applied to the) side, or the adhesive may be applied to both the leak-proof wall elastic member 55 and the sheet member 50s (auxiliary sheet 61).

  Further, an adhesive or the like is also applied to a region between the predetermined position f1 and the outer end 50eо in the lateral direction of the sheet member 50s to form a leak-proof wall joint 57 (see FIG. 6A).

  Next, as shown in FIG. 6B, the sheet member 50s is bent inward in the lateral direction and on the skin side in the thickness direction so that the predetermined position f1 and the predetermined position f4 overlap in the lateral direction. Then, the sheet members 50s folded in the thickness direction at the portion f1 (f4) are joined together by the leak-proof wall joining portion 57. Note that the sheet members 50s may be joined together using a crimping means such as embossing. That is, the leak-proof wall joint portion 57 may be formed not by an adhesive means using an adhesive material but by a pressure-bonding means such as embossing.

  Next, as shown in FIG. 6C, the sheet member 50s is folded inward in the lateral direction and skin side in the thickness direction at a predetermined position f5, and the support wall portion 54 is erected on the skin side. Thereby, the leak-proof wall 50 is formed and the planar contact part 53 is arrange | positioned at the skin side most in the thickness direction. The leak-proof wall 50 is formed with a triangle having the contact portion 53 as at least a part of the bottom side and the first inclined wall portion 51 and the second inclined wall portion 52 as the hypotenuse. In this case, the contact portion 53 has a region that is not joined to either the first inclined wall portion 51 or the second inclined wall portion 52 in the lateral direction. In the present embodiment, the predetermined positions f1 to f4 are set so that the lengths of L51 and L52 are substantially equal (L51 = L52), and L51 and L52 are longer than L53 (L51, L52> L53). Is set. Therefore, the triangle formed by the first inclined wall portion 51, the second inclined wall portion 52, and the contact portion 53 is an isosceles triangle.

  Note that the length L53 in the lateral direction of the contact portion 53 is desirably 20 mm or more and 40 mm or less (40 mm ≧ L53 ≧ 20 mm). When L53 is narrower than 20 mm, when the diaper 1 is worn, the lateral width of the contact portion 53 becomes narrow, and the corresponding contact portion 53 is difficult to maintain a planar shape. Moreover, when L53 is wider than 40 mm, when the wearer's leg is passed through the leg opening LH when the diaper 1 is worn, the wide contact portion 53 is likely to be caught by the finger of the leg, and the diaper 1 may be difficult to wear. There is.

  Further, end joints 70 are provided at both ends in the longitudinal direction of the leak-proof wall 50. In the end joint portion 70, the leak-proof wall 50 is joined to the top sheet 20 in the range indicated by the hatched portion in FIG. 1. Thereby, the support wall part 54 and the contact part 53 are fixed to the skin side surface of the top sheet 20 in the longitudinal direction edge part of the leak-proof wall 50, and when the diaper 1 is worn, the leak-proof wall 50 is around the waist of the wearer. It becomes difficult to stand up in the region, and it is possible to suppress the deterioration of fit.

<About the effect of the leak-proof wall 50>
The effect of the leak-proof wall 50 in the diaper 1 will be described. First, the problem which arises when wearing the underpants type disposable diaper 100 (henceforth "diaper 100") which has a conventional type leak-proof wall (leg gathers etc.) as a comparative example is demonstrated. Drawing 7A is a figure explaining the wearing state of diaper 100 (comparative example) before excretion is performed. FIG. 7B is a diagram illustrating a wearing state of the diaper 100 (comparative example) after excretion is performed.

  The basic structure of the diaper 100 of the comparative example is substantially the same as the diaper 1 of the present embodiment, but the configuration of the leak-proof wall is greatly different. In the diaper 100, a pair of leak-proof walls 150 are provided at both ends in the lateral direction of the absorbent main body 110 (absorbent core 111). The leak-proof wall 150 is provided with a plurality of elastic members 155 such as rubber thread (four elastic members 1551 to 1554 in FIG. 7A). The wall 150 stands up. In the wearing state of the diaper 100, as shown in FIG. 7A, the leakage preventing wall 150 is erected by the elastic members 1551 to 1554, and the contraction force by the elastic member 1551 located at the upper end portion of the erected leakage preventing wall 150. As a result of the action, the upper end portion of the leak-proof wall 150 fits along the wearer's body. The distance in the horizontal direction between the pair of leak-proof walls 150 at this time (that is, the distance between the apexes in the horizontal direction of the pair of leak-proof walls 150 and 150) is W150.

  In this state, when excretion is performed, the absorbent core 111 absorbs urine and the like, becomes heavy, and moves so as to hang downward. Then, the leak-proof wall 150 is also pulled by the absorptive core 111, and deform | transforms so that it may be extended below like FIG. 7B. And the vertex position of the leak-proof wall 150 moves so that it may each shift | deviate from the outer side of a horizontal direction, the distance W150 'between the vertices in a horizontal direction becomes smaller than the distance W150 between the vertices before excretion (W150>). W150 ′). This is because the force by which the leak-proof wall 150 is pulled downward by the absorbent core 111 whose weight has increased is larger than the contraction force by the elastic member 1551 disposed at the apex of the leak-proof wall 150. As a result, the absorbent core 111 can no longer resist the drooping downward, causing the absorbent core 111 to drastically droop, causing the wearer to feel uncomfortable, and the fit of the leak-proof wall 150 to deteriorate. This may cause discomfort to the wearer. Moreover, if excretion is piled up and the weight of the absorptive core 111 increases further, the elastic member 1551 arrange | positioned at the vertex part of the leak-proof wall 150 will become easier to move inside. In particular, on the back side, the position of the elastic member 1551 is likely to shift further inward than the apex of the protrusion of the wearer's buttocks, so that the buttocks protrude greatly from the diaper 100, and there is a risk of increasing the uncomfortable feeling when wearing the diaper. is there. Moreover, the vertex of the leak-proof wall 150 may be detached from the wearer's body, creating a gap in the leg-around portion of the diaper 100, and excrement may leak out of the diaper 100 from the gap.

  In addition, by making the contraction force by the elastic member 1551 sufficiently high, it is possible to suppress the position shift of the leak-proof wall 150 as described above. However, in that case, tightening at the apex portion of the leak-proof wall 150 becomes too strong, and the leak-proof wall 150 (elastic member 1551) may bite into the wearer's body, or the skin may be damaged.

  On the other hand, in the diaper 1 of this embodiment, since the flat contact part 53 is provided in the part which contact | abuts a wearer's skin (groin part) among the leak-proof walls 50, excretion is performed. Even if it is a case where it breaks, it can suppress that a clearance gap arises in a crotch part, making it difficult to give a wearer a discomfort. FIG. 8A is a diagram illustrating a wearing state of the diaper 1 before excretion is performed. Drawing 8B is a figure explaining the wearing state of diaper 1 after excretion is performed.

  In the wearing state of the diaper 1 shown in FIG. 8A, the contact portion 53 disposed on the skin side of the leak-proof wall 50 contacts the wearer's body. That is, it arrange | positions so that the whole contact part 53 may surface-contact with a wearer's body. As described above, the contact portion 53 is provided with a plurality of leak-proof wall elastic members 55 (551 to 554), and the contraction force by the leak-proof wall elastic members 55 acts on the entire plane, The contact portion 53 is firmly pressed against the wearer's body while maintaining the surface shape.

  Thereby, the whole contact part 53 of the leak-proof wall 50 can be made to fit a wearer's body in a plane. Moreover, since the contact part 53 is in surface contact with a wearer's body, the contraction force by the plurality of leak-proof wall elastic members 551 to 554 is dispersed, and the contact part 53 as a whole acts on the wearer's skin. The pressure is increased. Therefore, compared with the case where contraction force by a plurality of leak-proof wall elastic members 551-554 (for example, thread rubber) acts individually on the wearer's skin, it is suppressed that the pressure is locally increased, It suppresses that the wearing comfort of the diaper 1 deteriorates, and it becomes difficult to damage a wearer's skin. In the state shown in FIG. 8A, the distance between the pair of leak-proof walls 50 in the lateral direction (the distance between the pair of support wall portions 54 in the lateral direction) is W50.

  When excretion is performed on the diaper 1 in the state shown in FIG. 8A, the absorbent core 11 absorbs urine and the like and becomes heavier and tends to move downward. However, in the diaper 1 of this embodiment, the force which pushes up the contact part 53 to a wearer's skin side by the contraction force of the some elastic member 55 provided in the contact part 53 has arisen, and the absorbent core 11 of It becomes a resistance against the force by which the leak-proof wall 50 is pulled down (non-skin side) by the weight increase. Further, since the contact portion 53 is in surface contact with the wearer's skin, the friction on the contact surface is large, and the displacement of the contact portion 53 is unlikely to occur. Therefore, the horizontal interval W50 between the pair of leak-proof walls 50 is unlikely to fluctuate before and after excretion. From these things, the state which the contact part 53 of the leak-proof wall 50 contact | abutted to the wearer's skin like FIG. 8B is easy to be maintained, and favorable fitting property can be made. In addition, problems such as a gap between the wearer's skin and the leak-proof wall 50 are less likely to occur.

  Furthermore, in this embodiment, since the leak-proof wall 50 has the 1st inclination wall part 51 and the 2nd inclination wall part 52, when the diaper 1 is worn, the contact part 53 maintains more planar shape. It has an easy structure. FIG. 9A and FIG. 9B are diagrams illustrating an example where the leak-proof wall 50 does not include the first inclined wall portion 51 and the second inclined wall portion 52. FIG. 9A shows a state before excretion, and FIG. 9B shows a state after excretion.

  In the example of FIG. 9A, a flat top surface portion 153 corresponding to the contact portion 53 is provided on the most skin side (upper side) of the leak-proof wall 50. And the upper end 54e of the support wall part 54 is joined to the horizontal center vicinity of the top | upper surface part 153, and the substantially T-shaped leak-proof wall 50 as shown in FIG. 9A is formed. And in the state before excretion shown by FIG. 9A, the top | upper surface part 153 fits the wearer's body in planar shape.

  On the other hand, in the state after excretion shown in FIG. 9B, the support wall portion 54 of the leak-proof wall 50 is pulled downward (non-skin side) due to the increase in the weight of the absorbent core 11, whereby the top surface portion 153 and the support wall The load concentrates on the joint portion with the portion 54 (the position of the upper end 54e of the support wall portion 54 in FIG. 9B), and the top surface portion 153 is bent around the upper end 54e. That is, the top surface portion 153 cannot maintain a planar shape, and the leak-proof wall 150 is deformed into a Y shape as shown in FIG. 9B. As a result, the top surface portion 153 cannot be fitted to the wearer's body with a surface, and a gap is formed between the leak-proof wall 150 and the wearer's body. It becomes easy.

  On the other hand, in the diaper 1 of the present embodiment, when the weight of the absorbent core 11 increases, first, the support wall portion 54 of the leak-proof wall 50 is pulled downward. This downward force is distributed to the first inclined wall portion 51 and the second inclined wall portion 52 that are joined to the support wall portion 54, and is applied via the first inclined wall portion 51 and the second inclined wall portion 52. It acts on both lateral ends of the contact portion 53. Therefore, the abutting portion 53 is easy to maintain a planar shape without being bent at the central position in the lateral direction like the top surface portion 153 of FIG. 9B. That is, the force acting on the joint portion between the contact portion 53 and the first inclined wall portion 51 or the second inclined wall portion 52 by dispersing the load by the first inclined wall portion 51 and the second inclined wall portion 52. Reducing each.

  Moreover, in the leak-proof wall 50 of the diaper 1, it has the area | region where the 1st inclination wall part 51 and the 2nd inclination wall part 52 are not joined to the horizontal direction center part of the contact part 53, and the contact part 53 and A triangle formed by the first inclined wall portion 51 and the second inclined wall portion 52 is formed. As a result, the downward force (load) transmitted from the support wall portion 54 is prevented from concentrating on one place (particularly the central portion in the lateral direction) of the contact portion 53 as shown in FIG. 9B. The contact portion 53 is easy to maintain a planar shape.

  Furthermore, leak-proof wall elastic members 551 to 554 are arranged at the contact portion 53 at equal pitches (intervals) in the lateral direction. As a result, an overall uniform stretching force (longitudinal contraction force by the leak-proof wall elastic member 55) is likely to act on the surface of the contact portion 53, and a local force acts on a part of the region. This prevents the contact portion 53 from curling or bending. Therefore, when the diaper 1 is worn, the contact portion 53 can be more easily maintained in a planar shape, and the contact portion 53 can be easily fitted to the wearer's body in a planar shape.

  And in the area | region where the leak-proof wall elastic members 551-554 are arrange | positioned in the horizontal direction of the contact part 53, the applicable contact part 53 is joined to both the 1st inclination wall part 51 and the 2nd inclination wall part 52. Absent. That is, in the region where the leak-proof wall elastic members 551 to 554 are arranged in the contact portion 53, the number of stacked members (sheet members 50s) stacked in the thickness direction is constant. If the area where the leak-proof wall elastic members 551 to 554 are arranged in the contact portion 53 includes a portion with a large number of stacked layers and a portion with a small number of stacked layers, the rigidity of the portion with a large number of stacked layers is small. It becomes higher than the rigidity of the part. In this case, a difference in the amount of contraction in the longitudinal direction is likely to occur between the portion with high rigidity and the portion with low rigidity, and the contact portion 53 may be difficult to maintain a planar shape. On the other hand, in the diaper 1 of the present embodiment, the rigidity of the contact portion 53 in the region where the leak-proof wall elastic members 551 to 554 are arranged is easily maintained, and the contact portion 53 maintains a planar shape. The structure is easy to do.

  Further, by making the length L51 of the first inclined wall portion 51 in the inclined direction equal to the length L52 of the second inclined wall portion 52 in the inclined direction (L51 = L52, see FIG. 6), The load can be evenly distributed to the first inclined wall portion 51 and the second inclined wall portion 52. This makes it difficult for an unbalanced force to act on both lateral ends of the contact portion 53, and makes it difficult for the planar shape of the contact portion 53 to collapse.

  Further, by making the length L51 of the first inclined wall portion 51 (the length L52 of the second inclined wall portion 52) longer than the length L53 in the lateral direction of the contact portion 53 (L51, L52> L53, FIG. 6), the contact portion 53 can be prevented from being bent in the lateral direction. 10A and 10B are views for explaining the force acting on the contact portion 53 via the first inclined wall portion 51 (second inclined wall portion 52) of the leak-proof wall 50. FIG. FIG. 10A shows a case where L51 (L52)> L53, and FIG. 10B shows a case where L51 (L52) <L53.

  FIG. 10A shows a case in which a downward force F acts on the support wall portion 54 of the leak-proof wall 50 when the weight of the absorbent core 11 increases due to excretion or the like. In this case, a force of 1/2 F acts in the vertical direction at both ends in the lateral direction of the contact portion 53 where the first inclined wall portion 51 and the second inclined wall portion 52 are joined. Then, as shown in FIG. 10A, the angle formed between the first inclined wall portion 51 (or the second inclined portion 52) and the contact portion 53 (the smaller of the angles formed between the first inclined wall portion 51 and the contact portion 53). ) Is θ1, a force of 1/2 F · cosec θ1 is applied along the inclination direction of the first inclined wall portion 52, and a force 1/2 F · cot θ1 is applied from the outside to the inside along the horizontal direction. . Similarly, in FIG. 10B, a downward force F acts on the support wall portion 54, and an angle (smaller angle) formed between the first inclined wall portion 51 (or the second inclined portion 52) and the contact portion 53 is set. Assuming θ2, a force of 1/2 F · cosec θ2 acts on both lateral ends of the abutting portion 53 along the inclination direction of the first inclined wall portion 51, and a force 1 extending from the outside to the inside along the horizontal direction / 2F · cot θ2 acts.

  Here, since L51> L53 in FIG. 10A and L51 <L53 in FIG. 10B, θ1> θ2. 10A, the laterally inwardly acting force 1 / 2F · cot θ1 acting on both lateral ends of the contact portion 53 in FIG. 10A is laterally inwardly acting on both lateral ends of the contact portion 53 in FIG. 10B. The force is smaller than 1 / 2F · cot θ2 (1 / 2F · cot θ1 <1 / 2F · cot θ2). That is, the force acting from the lateral end portions to the lateral central side in the contact portion 53 is smaller in the case of L51> L53 than in the case of L51 <L53. That is, when the length L51 of the first inclined wall portion 51 (the length L52 of the second inclined wall portion 521) is longer than the length L53 of the contact portion 53, the contact portion 53 is positioned in the lateral center. Therefore, it is easy to suppress the contact portion 53 from being bent or bent (buckled). In the present embodiment, the leakage prevention wall 50 is formed so as to satisfy L51> L53 as described above. Therefore, the influence of the force acting from the lateral ends of the contact portion 53 to the central side is small. The contact portion 53 is easy to maintain a flat state.

  Moreover, in this embodiment, the auxiliary sheet 61 is laminated | stacked and joined to the non-skin side surface of the contact part 53, and the rigidity of the contact part 53 is high over the whole. Thereby, the contact portion 53 is less likely to be bent or bent, and the planar shape is easily maintained.

  A second auxiliary sheet 62 different from the auxiliary sheet 61 (referred to as the first auxiliary sheet 61) may be provided on the skin side surface of the contact portion 53. That is, the second auxiliary sheet 62 may be provided on a surface opposite to the surface on which the auxiliary sheet 61 is provided in the thickness direction of the contact portion 53. By providing the second auxiliary sheet 62 in addition to the first auxiliary sheet 61, the rigidity of the contact portion 53 becomes higher, and the planar shape can be easily maintained. Moreover, since the skin side surface of the contact part 53 is a site | part which contacts a wearer's body (skin) directly at the time of wearing of the diaper 1, the material (for example, nonwoven fabric) of the 2nd auxiliary sheet 62 is selected appropriately. By doing, the touch of the leak-proof wall 50 can also be improved.

  Further, as shown in FIG. 1, the leak-proof wall 50 is disposed so as to have a portion that intersects with the back leg elastic member 35 lg in the thickness direction. In the back side region of the diaper 1 in the pant-type shape, the leak-proof wall 50 is pulled up diagonally upward by the expansion and contraction force of the curved portion 35 lgc of the back-side leg-hole elastic member 35 lg. The wall 50 is easy to stand up and the leak-proof wall 50 is pulled, whereby the absorbent main body 10 is easily widened. Thereby, the fitting property of the leg periphery at the time of diaper 1 wearing improves.

  In addition, there is a region where the stretchability of the leak-proof wall elastic member 55 provided on the leak-proof wall 50 and the abdomen waist elastic member 35a and the back waist elastic member 35b intersect in the thickness direction. doing. Since the leak-proof wall elastic member 55 is supported by the lateral stretchability of the abdominal waistline elastic member 35a and the back-side waistline elastic member 35b, the leakproof wall 50 and the absorbent main body 10 are less likely to hang down. Thereby, even if it is a case where the absorptive core 11 absorbs excrement etc. and the weight becomes heavy, it is suppressed that the absorptive main body 10 droops greatly, and it becomes difficult to give a wearer an uncomfortable feeling.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, the contact portion 53 has the first inclined wall portion 51 and the second inclined portion only at the position of the outermost end in the lateral direction of the contact portion 53 (that is, the predetermined positions f2 and f3 in FIG. 6). Although it was joined to the wall portion 52, both may be joined in another region in the lateral direction of the contact portion 53. For example, both end portions in the lateral direction of the contact portion 53 may be joined to the first inclined wall portion 51 and the second inclined wall portion 52 over a predetermined length. FIG. 11 is a schematic cross-sectional view illustrating a modified example of the leak-proof wall 50. In the example of FIG. 11, a part of the contact portion 53 and the first inclined wall portion 51 in the left end region in the lateral direction of the contact portion 53 is interposed through an end joint portion 58 formed of an adhesive or the like. Are joined together. Similarly, a part of the contact portion 53 and the second inclined wall portion 52 is joined to each other through an end joint portion 59 formed of an adhesive or the like in the right end region in the lateral direction of the contact portion 53. ing.

  As described above, even when a part of the contact portion 53 is joined to the first inclined wall portion 51 and the second inclined wall portion 52, the contact portion 53 has a width of L53 ′ in the lateral direction. In the region, the first inclined wall portion 51 and the second inclined wall portion 52 are not joined, and an effect equivalent to that of the above-described embodiment can be obtained. That is, even if the triangular shape is formed by the region having the width of L53 ′ in the contact portion 53, the first inclined wall portion 51, and the second inclined wall portion 52, and the weight of the diaper 1 is increased, at least L53. A region having a width of ′ is kept in a planar shape. Therefore, by making the leak-proof wall 50 fit the wearer's body tightly, it is possible to prevent the fit feeling from deteriorating or the side leakage of excrement.

  In the above-described embodiment, the example in which the thread rubber is used as the waistline elastic member and the leak-proof wall elastic member has been described. However, these elastic members are not limited to a linear elastic member such as a so-called thread rubber. For example, a planar (strip-shaped) elastic member having a predetermined width may be used. Further, the sheet member constituting the leak-proof wall or the back sheet may be a stretchable sheet member (for example, a stretchable nonwoven fabric), so that an elastic member such as rubber thread need not be provided separately.

1 diapers (pants-type disposable diapers),
3 ventral waistline, 3es ventral side edge,
4 Back side waistline part, 4es back side edge part,
5 Inseam,
10 Absorbent body,
11 absorbent core, 11c dent, 11ea end, 11eb end,
12 core wrap sheet,
20 Top sheet,
30 backsheet, 30c dent,
31 Back film, 32 Upper outer layer sheet, 33 Lower outer layer sheet,
35a ventral waist elastic member, 35b dorsal waist elastic member,
35 lg back leg elastic member, 35 lgs linear part, 35 lgc curved part,
50 leakage barrier,
50s sheet member, 50ei inner edge, 50eо outer edge,
51 first inclined wall portion, 52 second inclined wall portion, 53 abutting portion,
54 support wall, 54e upper end,
55 leak-proof wall elastic member, 551-554 leak-proof wall elastic member,
57 leak-proof wall joint, 58 end joint, 59 end joint,
61 auxiliary sheet (first auxiliary sheet), 62 second auxiliary sheet,
70 End joint,
100 diapers (comparative example),
110 absorbent body, 111 absorbent core,
150 leakage barrier, 153 top surface,
155 elastic member, 1551 to 1554 elastic member,
f1, f2, f3, f4, f5 predetermined positions,
L51, L52, L53, L53 ′ length,
BH waist opening, LH leg opening,
CL10 predetermined position

Claims (9)

A longitudinal direction and a transverse direction intersecting the longitudinal direction,
An absorbent body that absorbs excreta;
A pair of leak-proof walls provided on both sides of the absorbent main body in the lateral direction and standing on the skin side of the wearer when worn;
A pants-type disposable diaper with
The leakage barrier is
A contact portion that has a predetermined width in the lateral direction and contacts the wearer's body when worn;
A first inclined wall portion extending from one end in the lateral direction of the contact portion to the other lateral side of the contact portion and the non-skin side of the wearer;
A second inclined wall portion extending from one end in the lateral direction of the contact portion to one side in the lateral direction of the contact portion and to the non-skin side of the wearer;
Have
The contact portion has a region that is not joined to either the first inclined wall portion or the second inclined wall portion in the lateral direction.
A pants-type disposable diaper characterized by that. The pants-type disposable diaper according to claim 1,
The leak-proof wall has a support wall portion that is joined to ends of the first inclined wall portion and the second inclined wall portion and supports the first inclined wall portion and the second inclined wall portion. Characteristic pants-type disposable diapers. The pants-type disposable diaper according to claim 1 or 2,
The pants-type disposable diaper, wherein the abutting portion is not joined to either the first inclined wall portion or the second inclined wall portion in the laterally central portion. The pants-type disposable diaper according to any one of claims 1 to 3,
A pants-type disposable diaper, wherein a plurality of elastic members along the longitudinal direction of the absorbent main body are arranged at the abutting portion at predetermined intervals in the lateral direction. The pants-type disposable diaper according to claim 4,
The pants-type disposable diaper, wherein the plurality of elastic members are arranged at an equal pitch in the lateral direction. The pants-type disposable diaper according to claim 4 or 5,
In the region where the plurality of elastic members are arranged in the lateral direction, the abutment portion is not joined to any of the first inclined wall portion and the second inclined wall portion. Disposable diapers. The pants-type disposable diaper according to any one of claims 1 to 6,
A pants-type disposable diaper, wherein a first auxiliary sheet is laminated and provided on the non-skin side of the contact portion. The pants-type disposable diaper according to claim 7,
A pants-type disposable diaper characterized in that a second auxiliary sheet different from the first auxiliary sheet is provided on the skin side of the contact portion. A pants-type disposable diaper according to any one of claims 1 to 8,
The length of the first inclined wall portion in the inclined direction and the length of the second inclined wall portion in the inclined direction are:
A pants-type disposable diaper, characterized in that it is longer than the length of the abutment portion in the lateral direction.