JP5504049B2 - Diapers - Google Patents

Description

  The present invention relates to a diaper that absorbs body fluid of a wearer.

  Conventionally, as disposable diapers that absorb a wearer's urine, general disposable diapers such as a pants type and a tape-fastened type, and a urine collection pad used by laying inside the diaper are known. As an example of a conventional diaper, Patent Document 1 describes a disposable diaper configured with a first member having a liquid-absorbing core and a second member disposed on the upper surface side of the first member. In patent document 1, the cavity part which receives a stool is formed between the 1st member and the 2nd member. Moreover, in patent document 1, the 1st opening and the 2nd opening are formed in the top surface part of the 2nd member.

Japanese Patent Laid-Open No. 11-113958

  In Patent Document 1, the crotch elastic member contracts, and the top surface portion of the second member moves away from the inner surface of the first member (paragraph 0016). However, the crotch elastic member of Patent Document 1 is disposed in the vicinity of the top edge of the side wall, that is, the outer edge of the top surface (paragraph 0014, FIGS. 2 and 3). For this reason, in the structure of patent document 1, it is thought that the support force from the bottom with respect to a 2nd member is weak, Therefore, the lift of a 2nd member may become inadequate. If the lifting of the second member is insufficient, the adhesion of the second member to the wearer is reduced, and urine leakage to the side tends to occur.

  This invention is made | formed in view of such a situation, and it aims at providing the diaper which can raise an upper layer absorber stably on the upper surface side of a lower layer absorber.

In order to solve the above problems, a first invention of the present application is a diaper that absorbs a body fluid of a wearer, and is a liquid-permeable top sheet, a liquid-impermeable back sheet, the top sheet, and the back sheet. Along the both sides of the buffer space formed between the lower layer absorber interposed between the upper layer absorber disposed on the upper surface side of the top sheet, and the top sheet and the upper layer absorber, A pair of side edge sheets extending in the front-rear direction, and the side edge sheet has a folded portion that is folded below the upper-layer absorber, and extends in the front-rear direction to the folded portion of the side edge sheet. An elastic member is attached.
Further, in the diaper, the upper-layer absorber is disposed at the center absorber disposed above the elastic member, the front absorber disposed in front of the center absorber, and the rear of the center absorber. A rear absorber.
Further, in the diaper, the front absorbent body and the rear absorbent body are joined directly or indirectly to the upper surface of the top sheet, and the diaper comprises the front absorbent body and the central absorbent body. And a liquid-permeable surface sheet bonded to the upper surface of the rear absorbent body.

2nd invention of this application is a diaper of 1st invention, Comprising: The said center absorber has a through-hole penetrated up and down.

3rd invention of this application is a diaper of 2nd invention, Comprising: The said through-hole is a slit-shaped through-hole extended in the front-back direction.

4th invention of this application is a diaper of 3rd invention, Comprising: The said through-hole is arrange | positioned at a pair on right and left.

A fifth invention of the present application is a diaper according to any one of the first invention to the fourth invention, wherein the pair of side edge sheets are made of a water-repellent material.

6th invention of this application is a diaper in any one of 1st invention from 5th invention, Comprising: The upper surface of the said top sheet is exposed to the width direction outer side of the said side edge sheet | seat.

7th invention of this application is a diaper in any one of 1st invention from 6th invention, Comprising: It arrange | positions in the width direction outer side of the said side edge sheet | seat, and stands up with respect to the said top sheet, A pair of water-repellent A leak-proof sheet is further provided.

According to the first to seventh inventions of the present application, the elastic member is arranged at a position below the upper-layer absorber. For this reason, the upper-layer absorber can be stably lifted to the upper surface side by the contraction force of the elastic member. A part of the body fluid excreted from the wearer is absorbed and held by the upper layer absorbent body. Moreover, the other part of the bodily fluid excreted from the wearer reaches the lower layer absorber through the buffer space and is absorbed and held by the lower layer absorber. Leakage of body fluid from the buffer space to the side is suppressed by the pair of side edge sheets.

Moreover , according to the 1st invention -the 7th invention of this application, the absorptive power of the bodily fluid in the front and back of a center absorber improves.

Moreover , according to the 1st invention -the 7th invention of this application, the floating of the front-end part of a center absorber and a rear-end part is suppressed. For this reason, a center absorber floats in the shape close | similar to an arch shape. Thereby, a center absorber can be floated to the upper surface side more stably.

Particularly, according to the second invention of the present application, the body fluid excreted from the wearer quickly flows into the buffer space through the through hole. For this reason, even when excretion has a strong momentum, it is possible to prevent body fluid from overflowing on the upper surface side of the upper-layer absorbent body.

In particular, according to the third invention of the present application, the central absorbent body can be curved with the through hole as a boundary. For this reason, a center absorber can be made to fit favorably between a wearer's crotch.

In particular, according to the fourth invention of the present application, the central absorbent body can be curved in a trapezoidal shape in a cross-sectional view. For this reason, a center absorber can be made to fit better between a wearer's crotch.

In particular, according to the fifth aspect of the present invention, leakage of body fluid from the buffer space to the side can be prevented with high certainty.

In particular, according to the sixth invention of the present application, the body fluid leaking to the outer side in the width direction of the side edge sheet can be guided to the lower layer absorbent body via the top sheet.

In particular, according to the seventh invention of the present application, it is possible to suppress the leakage of the body fluid to the side with higher certainty.

It is a perspective view of a urine collection pad. It is the top view which looked at the urine collection pad from the upper surface side. FIG. 3 is a cross-sectional view of the urine collection pad as seen from the position III-III in FIG. 2. It is sectional drawing of the urine collection pad seen from the IV-IV position in FIG. It is sectional drawing of the urine collection pad seen from the VV position in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

<1. Urine collection pad according to one embodiment>
FIG. 1 is a perspective view of a urine collection pad 1 which is an embodiment of the diaper of the present invention. FIG. 2 is a plan view of the urine collection pad 1 as viewed from the upper surface side. FIG. 2 shows a state in which the leak-proof sheet 60 is partially broken. 3, FIG. 4, and FIG. 5 are cross-sectional views of the urine collection pad 1 viewed from the III-III position, the IV-IV position, and the VV position in FIG. 2, respectively.

  The urine collection pad 1 is an insole type diaper that is used by being laid inside a general disposable diaper (hereinafter referred to as an “outer diaper”) such as a tape fixing type or a pants type. The urine collection pad 1 is placed between the wearer's crotch inside the outer diaper and absorbs urine excreted by the wearer. In the case of mild urination, only the urine collection pad 1 needs to be replaced without replacing the outer diaper, thereby reducing the economic burden on the wearer and the care burden on the caregiver.

  As shown in FIGS. 1 to 5, the urine collection pad 1 includes a top sheet 10, a back sheet 20, a lower layer absorber 30, an upper layer unit 40, a pair of side edge sheets 50, and a pair of leak-proof sheets 60. .

  The top sheet 10 is a liquid-permeable sheet that covers the upper surface (surface on the skin side) of the lower layer absorber 30. The top sheet 10 of the present embodiment is composed of a nonwoven fabric that is made liquid permeable by treating the surface of hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) with a surfactant. However, the material of the top sheet 10 is not limited to this. For example, the top sheet 10 may be composed of a nonwoven fabric using hydrophilic fibers (cellulose, rayon, cotton, etc.).

  The back sheet 20 is a liquid-impermeable sheet that covers the lower surface (outer surface) of the lower layer absorber 30. The back sheet 20 of the present embodiment is made of a plastic film. However, the material of the back sheet 20 is not limited to this. For example, the back sheet 20 may be made of a water-repellent nonwoven fabric using hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.). Moreover, the back sheet 20 may be comprised with the plastic film and the highly flexible nonwoven fabric affixed on the lower surface.

  The lower layer absorber 30 is a member having a liquid absorbing property and a liquid retaining property, which is disposed between the top sheet 10 and the back sheet 20. The lower layer absorber 30 is fixed between the top sheet 10 and the back sheet 20 with an adhesive (not shown). As shown in FIG. 2, the lower layer absorber 30 is smaller than the top sheet 10 and the back sheet 20 and larger than an upper layer absorber 43 described later in plan view.

  The lower layer absorbent body 30 of this embodiment is a paper sheet such as tissue paper or a lump obtained by mixing a hydrophilic fiber such as pulverized pulp fiber or cellulose fiber and a granular superabsorbent polymer (SAP). It is coated with a liquid-permeable nonwoven fabric sheet. However, the material and structure of the lower layer absorber 30 are not limited to this. For example, the lower layer absorber 30 may be formed by molding only a superabsorbent polymer into a sheet shape.

  The upper layer unit 40 is disposed on the upper surface side of the top sheet 10. The upper layer unit 40 includes a top sheet 41, a back sheet 42, and an upper layer absorber 43 disposed between both sheets 41 and 42.

  The top sheet 41 and the back sheet 42 are respectively disposed on the upper surface side and the lower surface side of the upper layer absorber 43. Both the front sheet 41 and the back sheet 42 are made of a liquid-permeable nonwoven fabric. For example, the top sheet 41 and the back sheet 42 can be configured using the same material as that applied to the top sheet 10 described above.

  The upper layer absorber 43 includes a front absorber 44, a central absorber 45, and a rear absorber 46 that are separated from each other. The front absorbent body 44, the central absorbent body 45, and the rear absorbent body 46 are arranged in the front-rear direction between the topsheet 41 and the backsheet 42. The top sheet 41 and the back sheet 42 described above are bonded to the upper and lower surfaces of these absorbers 44, 45, and 46, respectively, with an adhesive (not shown).

  The front absorbent body 44, the central absorbent body 45, and the rear absorbent body 46 are all made of a material having liquid absorbency and liquid retention. For example, the front absorber 44, the central absorber 45, and the rear absorber 46 can be configured using the same material as that applied to the lower layer absorber 30 described above.

  As shown in FIG. 5, the upper layer unit 40 is joined to the top sheet 10 at a position below the front absorber 44 and the rear absorber 46. Specifically, the lower surface of the back sheet 42 and the upper surface of the top sheet 10 are joined by an adhesive 70 at positions below the front absorber 44 and the rear absorber 46. On the other hand, the back sheet 42 and the top sheet 10 are not joined at a position below the central absorbent body 45. For this reason, the part in which the central absorber 45 is disposed in the upper layer unit 40 can be lifted upward from the upper surface of the top sheet 10.

  Further, both side portions of the upper layer unit 40 are connected to the top sheet 10 by a pair of side edge sheets 50. The pair of side edge sheets 50 extend in a belt shape in the front-rear direction along both side portions of the upper layer unit 40. As shown in FIGS. 3 and 4, the upper end portion of the side edge sheet 50 is joined to the upper surface of the top sheet 41 with an adhesive (not shown). Moreover, the lower end part of the side edge sheet | seat 50 is joined to the upper surface of the top sheet 10 with the adhesive agent (illustration omitted). Each side edge sheet 50 is configured by a water-repellent nonwoven fabric using hydrophobic fibers (for example, polypropylene or polyethylene).

  As shown in FIG. 4, the pair of side edge sheets 50 includes a folded portion 51 that is folded inward in the width direction. The folded portion 51 is disposed between the upper layer unit 40 and the top sheet 10 at least in a folded state. The side edge sheet 50 of the present embodiment has two folds 52 and 53 at the top and bottom, and has a substantially Z-shaped cross section as a whole. A folded portion 51 is formed between the upper fold line 52 and the lower end portion of the side edge sheet 50.

  Two floating elastic members 54 extending in the front-rear direction are attached to the folding portions 51 of the side edge sheets 50. The two floating elastic members 54 are disposed below the central absorbent body 45 in a state where at least the folding portion 51 is folded. When the urine collection pad 1 is manufactured, the floating elastic member 54 is attached to the folding portion 51 with an adhesive (not shown) in a state where the elastic member 54 is extended beyond the natural length. For this reason, the elastic member 54 for levitation generates an elastic force that contracts the side edge sheet 50 in the front-rear direction.

  In the present embodiment, a polyurethane-like elastic member made of polyurethane is used as the floating elastic member 54. However, the material and shape of the floating elastic member 54 are not limited to this. For example, the floating elastic member 54 may use natural rubber. The levitation elastic member 54 may be a belt-like elastic member.

  When the urine collection pad 1 is worn, the central absorbent body 45 is lifted above the top sheet 10 by the contraction force of the floating elastic member 54. That is, the top sheet 10, the lower layer absorber 30, and the back sheet 20 are curved at the wearer's crotch, whereas the floating elastic member 54 has a shape that is the shortest distance in the front-rear direction (that is, a linear shape). , Try to maintain as much as possible. For this reason, the central absorbent body 45 is in a state of being relatively lifted with respect to the top sheet 10.

  In particular, in this urine collection pad 1, a floating elastic member 54 is disposed below the central absorbent body 45. For this reason, the central absorber 45 receives a push-up force from below and stably floats. Therefore, when the urine collection pad 1 is worn, the upper surface of the upper layer unit 40 can be fitted well to the wearer's skin. Further, the central absorbent body 45 itself has a certain degree of compression recovery property (cushioning property). For this reason, when the urine collection pad 1 is worn, the upper surface of the upper layer unit 40 is deformed so as to follow the wearer's skin. Therefore, the upper surface of the upper layer unit 40 fits better to the wearer's skin.

  When the central absorbent body 45 is lifted above the top sheet 10, a space 80 (hereinafter referred to as “buffer space 80”) is formed between the upper layer unit 40 and the top sheet 10. The buffer space 80 is a space surrounded by the back sheet 42 of the upper layer unit 40, the top sheet 10, and a pair of side edge sheets 50 extending on both sides.

  Moreover, as shown in FIG.1, FIG.2, and FIG.4, the two through-holes 45a are formed in the center absorber 45 of this embodiment. Each through-hole 45a extends in a slit shape in the front-rear direction and penetrates the central absorber 45 up and down. A push-up force by the floating elastic member 54 easily acts on a portion of the central absorbent body 45 outside in the width direction from the pair of through holes 45a. On the other hand, the push-up force by the levitating elastic member 54 is unlikely to act on the portion of the central absorbent body 45 located between the pair of through holes 45a. For this reason, the center absorber 45 is curved in a cup shape opened upward as shown in FIG. Due to such deformation, the central absorbent body 45 fits the wearer's skin better. Moreover, the center absorber 45 can catch the urine excreted from the wearer better by such deformation.

  Further, as described above, the upper layer unit 40 is joined to the top sheet 10 at a position below the front absorber 44 and the rear absorber 46. For this reason, lifting of the front end portion and the rear end portion of the central absorbent body 45 is suppressed. As a result, as shown in FIG. 5, when viewed in a cross section perpendicular to the width direction, the central absorbent body 45 floats while forming a shape close to an arch shape. Thereby, the center absorber 45 floats to the upper surface side more stably.

  When the wearer of the urine collection pad 1 excretes urine, a part of the urine is absorbed by the upper layer absorbent body 43 through the surface sheet 41. Further, another part of the urine excreted from the wearer flows into the buffer space 80 through the through hole 45a. The urine stored in the buffer space 80 is absorbed by the lower layer absorber 30 through the top sheet 10.

  Thus, urine can be temporarily stored in the buffer space 80 in the urine collection pad 1 of the present embodiment. For this reason, even when urine is excreted at a rate faster than the absorption rate of urine by the absorber, the urine is temporarily stored in the buffer space 80, and then the urine is gradually absorbed by the lower layer absorber 30. be able to. Thereby, it can suppress that urine overflows in the upper surface side of the upper layer unit 40. FIG.

  In the present embodiment, urine excreted from the wearer quickly flows into the buffer space 80 via the through hole 45a. For this reason, the overflow of urine on the upper surface side of the upper layer unit 40 is further suppressed. Further, leakage of urine that has once flowed into the buffer space 80 to the side is prevented by the side edge sheet 50.

  In this embodiment, urine stored in the buffer space 80 is absorbed not only by the lower layer absorber 30 but also by the upper layer absorber 43. That is, a part of the urine stored in the buffer space 80 penetrates forward, upward, and rearward through the back sheet 42 of the upper layer unit 40, and the front absorber 44, the central absorber 45, and the rear absorption. It is absorbed into the body 46. Therefore, the urine stored in the buffer space 80 can be absorbed more rapidly than in the case where the urine stored in the lower layer absorber 30 alone is absorbed. Moreover, since the center absorber 45 is arrange | positioned between the buffer space 80 and a wearer, the backflow of urine from the buffer space 80 to the skin side is suppressed.

  In addition, a pair of leak-proof sheets 60 are arranged on the outer side of the side edge sheet 50 in the width direction. The pair of leak-proof sheets 60 extend in the front-rear direction on both sides of the urine collection pad 1. Each leak-proof sheet 60 is configured by a water-repellent nonwoven fabric using hydrophobic fibers (for example, polypropylene or polyethylene). Each leak-proof sheet 60 has a base end portion 61 joined to the top sheet 10 and an upright portion 62 that stands up with respect to the base end portion 61. The base end portion 61 is joined to the upper surface of the top sheet 10 with an adhesive (not shown).

  Two standing elastic members 63 extending in the front-rear direction are attached to the standing portion 62. In this embodiment, a polyurethane thread-like elastic member is used as the standing elastic member 63. However, the material and shape of the standing elastic member 63 are not limited thereto. For example, the standing elastic member 63 may use natural rubber. Further, the standing elastic member 63 may be a belt-like elastic member.

  When the urine collection pad 1 is manufactured, the standing elastic member 63 is attached to the standing portion 62 of the leak-proof sheet 60 in a state where the standing elastic member 63 is extended beyond the natural length. For this reason, the standing elastic member 63 generates an elastic force that causes the standing portion 62 of the leak-proof sheet 60 to contract in the front-rear direction. When the standing elastic member 63 contracts, the standing portion 62 rises with respect to the top sheet 10 as shown in FIGS. 3 and 4. As a result, a pair of upstanding weirs is formed on the upper surface of the urine collection pad 1. Even if urine leaks laterally from the upper layer unit 40, the urine is blocked by the standing portion 62 of the leak-proof sheet 60. Thereby, the urine leakage to the side can be suppressed with higher certainty.

  Further, in the urine collection pad 1 of the present embodiment, a region 90 where the top sheet 10 is exposed is secured between the side edge sheet 50 and the base end portion 61 of the leak-proof sheet 60. The lower layer absorber 30 is disposed below the region 90. For this reason, even if urine leaks laterally from the upper layer unit 40, the urine can be guided to the lower layer absorber 30 via the top sheet 10.

<2. Modification>
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  In the above embodiment, the upper layer absorber 43 includes the front absorber 44, the central absorber 45, and the rear absorber 46. However, the front absorber 44 and the rear absorber 46 may be omitted. That is, only the central absorbent body 45 may be arranged as the upper layer absorbent body 43.

  However, if the front absorber 44 and the rear absorber 46 are arranged as in the above-described embodiment, the urine absorbability at the front and rear of the central absorber 45 is improved. Moreover, at the time of manufacture of the urine collection pad 1, the front part absorber 44, the center absorber 45, and the rear part absorber 46 can be arrange | positioned as a series of absorbers. Thereby, it is easier to position the central absorbent body 45 than when the central absorbent body 45 is disposed alone.

  Further, in the above-described embodiment, two slit-shaped through holes 45 a are formed in the central absorbent body 45. However, the number of through holes 45a may be one, or may be three or more.

  However, as in the above embodiment, the through holes 45a are preferably arranged in a pair on the left and right. If the through holes 45a are arranged in a pair on the left and right sides, the central absorbent body 45 can be easily bent into a trapezoidal shape as shown in FIG. For this reason, the center absorber 45 can be fitted more favorably between the wearer's crotch.

  Moreover, the shape of the through-hole 45a does not necessarily need to be a slit shape. For example, a rectangular or elliptical through hole may be formed in the center of the central absorbent body 45 in plan view.

  Further, the central absorbent body 45 does not necessarily have the through hole 45a. When the through-hole 45a is not formed in the central absorbent body 45, the urine excreted from the wearer is once absorbed into the central absorbent body 45 and then flows into the buffer space 80. Further, the urine excreted from the wearer flows into the buffer space 80 through the gap between the front absorbent body 44 and the central absorbent body 45 or the gap between the central absorbent body 45 and the rear absorbent body 46. It may be. Further, the central absorbent body 45 may be separated into a plurality of absorbent bodies, and urine may flow into the buffer space 80 through the gaps between the plurality of absorbent bodies.

  Moreover, in said embodiment, although the side edge sheet | seat 50 had the substantially Z-shaped cross section, the shape of the side edge sheet | seat 50 is not limited to this. For example, the side edge sheet 50 may have a bellows shape having more folds than the above embodiment. In that case, it is preferable that the floating elastic member 54 is disposed on the surface closest to the upper layer unit 40 in the folded portion 51 disposed between the top sheet 10 and the upper layer unit 40.

  Moreover, in said embodiment, although the side edge sheet | seat 50 was comprised with the water-repellent nonwoven fabric, the side edge sheet | seat 5 may be comprised with the liquid-permeable nonwoven fabric. Even if a liquid-permeable non-woven fabric is used, if both side portions of the buffer space 80 are covered with the side edge sheet 50, the effect of storing urine in the buffer space 80 can be obtained accordingly.

  However, if the side edge sheet 50 is made of a water-repellent nonwoven fabric as in the above embodiment, urine leakage from the buffer space 80 to the side can be more reliably prevented.

  In the above embodiment, the front absorber 44 and the rear absorber 46 are indirectly joined to the top surface of the top sheet 10 via the back sheet 42. However, the back sheet 42 may be omitted, and the lower surfaces of the front absorbent body 44 and the rear absorbent body 46 may be directly joined to the upper surface of the top sheet 10.

  Moreover, a slit-like through hole or groove extending in the front-rear direction may be formed in the lower layer absorber 30. By doing so, urine permeating from the buffer space 80 to the lower layer absorber 30 side can be diffused in the front-rear direction, and urine can be absorbed in a wider area of the lower layer absorber 30. Thereby, the absorption capacity of the lower layer absorber 30 can be increased.

  Moreover, said embodiment demonstrated the urine collection pad 1 used laying inside an outer diaper. However, the diaper of the present invention may be a pad-shaped diaper used by laying inside the underwear. The diaper of the present invention may be an outer diaper. Moreover, the diaper of the present invention may be intended for an adult or may be intended for an infant. The diaper of the present invention may absorb not only urine but also other body fluids such as loose stool.

  Moreover, you may combine suitably each element which appears in said embodiment and modification in the range which does not produce inconsistency.

DESCRIPTION OF SYMBOLS 1 Urine collection pad 10 Top sheet 20 Back sheet 30 Lower layer absorber 40 Upper layer unit 41 Top sheet 42 Back surface sheet 43 Upper layer absorber 44 Front absorber 45 Central absorber 45a Through-hole 46 Rear absorber 50 Side edge sheet 51 Folding part 52 , 53 Fold 54 Floating elastic member 60 Leakproof sheet 61 Base end portion 62 Standing portion 63 Standing elastic member 70 Adhesive 80 Buffer space 90 Region

Claims (7)

A diaper that absorbs the body fluid of the wearer,
A liquid-permeable topsheet;
A liquid-impermeable backsheet;
A lower layer absorber interposed between the top sheet and the back sheet;
An upper layer absorber disposed on the upper surface side of the top sheet;
A pair of side edge sheets extending in the front-rear direction along both side portions of the buffer space formed between the top sheet and the upper layer absorber,
With
The side edge sheet has a folded portion folded downward of the upper layer absorbent body,
An elastic member extending in the front-rear direction is attached to the folded portion of the side edge sheet ,
The upper layer absorber is
A central absorber disposed above the elastic member;
A front absorber disposed in front of the central absorber;
A rear absorber disposed behind the central absorber;
Have
The front absorber and the rear absorber are joined directly or indirectly to the top surface of the topsheet,
A diaper further comprising a liquid-permeable surface sheet bonded to the upper surfaces of the front absorbent body, the central absorbent body, and the rear absorbent body .   A diaper according to claim 1,
  The said center absorber is a diaper which has a through-hole penetrated up and down.   A diaper according to claim 2,
  The said through-hole is a diaper which is a slit-shaped through-hole extended in the front-back direction.   The diaper according to claim 3,
  A diaper in which the through holes are arranged in a pair on the left and right.   A diaper according to any one of claims 1 to 4,
  The pair of side edge sheets is a diaper made of a water-repellent material.   A diaper according to any one of claims 1 to 5,
  A diaper in which an upper surface of the top sheet is exposed outside in the width direction of the side edge sheet.   A diaper according to any one of claims 1 to 6,
  A diaper further comprising a pair of water-repellent leakproof sheets that are disposed on the outer side in the width direction of the side edge sheet and stand up with respect to the top sheet.

Images