CN209933193U

CN209933193U - Absorbent article

Info

Publication number: CN209933193U
Application number: CN201690001647.9U
Authority: CN
Inventors: 长瀬纪子; 植田麻穗; 桂川邦彦
Original assignee: Eunija Co Ltd
Current assignee: Eunija Co Ltd
Priority date: 2016-04-21
Filing date: 2016-04-21
Publication date: 2020-01-14
Anticipated expiration: 2026-04-21
Also published as: WO2017183164A1; JP6337223B2; JPWO2017183164A1

Abstract

An absorbent article includes: an absorbent body (10) having a liquid-absorbent body (11); a ventral portion (30) joined to one end side in the longitudinal direction of the absorbent body (10); a back portion (40) joined to the other end side of the absorbent main body (10) in the longitudinal direction; and elastic members (35, 45) that are provided on at least one of the front side portion (30) and the back side portion (40) and that extend in the lateral direction, wherein the absorbent article has a plurality of through holes (50) that penetrate from the skin side to the non-skin side, and wherein, in a state in which the front side portion (30) and the back side portion (40) are contracted in the lateral direction, the distance between one end and the other end in the lateral direction of the through hole (50) in at least a part of a region that is provided in the longitudinal direction on the lower side than the upper end of the absorbent body (11) is greater than the distance between one end and the other end in the lateral direction of the through hole (50) that is provided in a region that is provided in the longitudinal direction on the upper side than the upper end of the absorbent body (11).

Description

Absorbent article

Technical Field

The utility model relates to an absorptive article.

Background

Conventionally, disposable diapers and the like have been known as absorbent articles for absorbing excrement such as urine. For example, as shown in document 1, a pants-type disposable diaper 1 includes an outer package 3 and an absorbent body 2, and a plurality of holes 5 penetrating through the outer package 3 in a thickness direction. By providing the plurality of holes 5, the air permeability of the absorbent article can be improved.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2015-

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

However, in the disposable diaper 1 disclosed in document 1, since the openings of the plurality of holes 5 are uniform in size, there is a possibility that a portion having insufficient air permeability is locally generated, and the wearer feels a sense of discomfort. For example, the region of the diaper near the leg band is a region where the wearer sweats a lot due to moving legs, and if the opening width of the hole 5 is narrow in this region and proper air permeability cannot be secured, stuffiness and swelling are likely to occur, and a feeling of discomfort may occur in some cases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article having improved air permeability when worn.

Means for solving the problems

The main technical solution for achieving the above object is an absorbent article having a longitudinal direction and a transverse direction orthogonal to each other, the absorbent article comprising: an absorbent main body having an absorbent body having liquid absorbency; a ventral portion joined to one end side of the absorbent main body in the longitudinal direction and provided on the ventral side of the wearer; a back side section joined to the other end side of the absorbent main body in the longitudinal direction and provided on the back side of the wearer; and an elastic member provided on at least one of the abdominal side portion and the back side portion and extending in the lateral direction, wherein the absorbent article has a plurality of through holes penetrating from a skin side to a non-skin side, and a distance between one end and the other end in the lateral direction of at least a part of the through holes provided in a region below an upper end of the absorbent body in the longitudinal direction is larger than a distance between one end and the other end in the lateral direction of the through holes provided in a region above the upper end of the absorbent body in the longitudinal direction in a state where the abdominal side portion and the back side portion are contracted in the lateral direction.

Other features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

Effect of the utility model

According to the utility model discloses, can provide one kind and promote the gas permeability and the good absorbent article of laminating nature.

Drawings

Fig. 1 is a schematic perspective view of a diaper 1 as an example of the absorbent article of the present embodiment.

Fig. 2 is a plan view of the diaper 1 in an unfolded, extended state as viewed from the skin side.

Fig. 3 is a view showing a cross section a-a of fig. 2.

Fig. 4A is a view showing a part of the band-shaped ventral outer package member 300 in an extended state before the slit S (through hole 50) is formed. Fig. 4B is a diagram showing a part of the band-shaped ventral outer package member 300 in an extended state when the slit S (through hole 50) is formed. Fig. 4C is a view showing a part of the abdomen-side outer package member 30 in a worn state.

Fig. 5 is a schematic view showing an enlarged portion B of fig. 2.

Fig. 6A is a diagram illustrating the through hole 50a in fig. 5. Fig. 6B is a diagram illustrating the through hole 50g of fig. 5.

Fig. 7 is a plan view of the diaper 100 according to another embodiment viewed from the skin side.

Detailed Description

At least the following matters will be made clear from the description of the present specification and the attached drawings.

An absorbent article having mutually orthogonal longitudinal and transverse directions, the absorbent article comprising: an absorbent main body having an absorbent body having liquid absorbency; a ventral portion joined to one end side of the absorbent main body in the longitudinal direction and provided on the ventral side of the wearer; a back side section joined to the other end side of the absorbent main body in the longitudinal direction and provided on the back side of the wearer; and an elastic member provided on at least one of the abdominal side portion and the back side portion and extending in the lateral direction, wherein the absorbent article has a plurality of through holes penetrating from a skin side to a non-skin side, and a distance between one end and the other end in the lateral direction of at least a part of the through holes provided in a region below an upper end of the absorbent body in the longitudinal direction is larger than a distance between one end and the other end in the lateral direction of the through holes provided in a region above the upper end of the absorbent body in the longitudinal direction in a state where the abdominal side portion and the back side portion are contracted in the lateral direction.

In the absorbent article of this type, when the absorbent article is worn, the opening width in the lateral direction of the through-hole is widened in the region under the leg band of the wearer and which is likely to be hot, and moisture such as sweat is likely to be released to the outside through the through-hole. This increases the air permeability of the absorbent article, suppresses the occurrence of stuffiness and swelling when the absorbent article is worn, and can reduce the discomfort of the wearer.

In the absorbent article, it is preferable that, in at least one of the front side portion and the back side portion, a magnitude of a force with which the lower region is contracted in the lateral direction by an elastic force of the elastic member disposed in a region below a position of an upper end of the absorbent body in the longitudinal direction is larger than a magnitude of a force with which the lower region is contracted in the lateral direction by an elastic force of the elastic member disposed in a region above the position of the upper end of the absorbent body in the longitudinal direction.

In such an absorbent article, a large contraction force acts on the region below the absorbent article by the elastic member, so that the through-hole is pulled to both sides in the lateral direction, and the opening width is increased. This can improve the air permeability of the region. The size of the opening width of the through hole can be adjusted with high precision by adjusting the elastic force of the elastic member, and the manufacturing cost can be suppressed because no change of the device is required.

In the absorbent article, it is preferable that at least a part of the elastic member joined to a region on the lower side in the longitudinal direction than the position of the upper end of the absorbent body has a greater degree of elongation with respect to the natural length than the elastic member joined to a region on the upper side in the longitudinal direction than the position of the upper end of the absorbent body in at least either of the abdominal portion and the back portion.

In the absorbent article, when the elastic member is disposed in the lateral direction, the extension ratio of the elastic member is changed between the upper region and the lower region of the absorbent article, and the elastic force acting on these regions can be adjusted. This makes it possible to easily and accurately adjust the opening width of the through-hole, thereby further improving the air permeability.

In the absorbent article, the through-holes are preferably provided on the outer side of the absorbent body in the lateral direction, and at least a part of the elastic member is discontinuous in a region where the absorbent body and the elastic member overlap in the thickness direction.

With such an absorbent article, since a lateral contractive force is less likely to act on the absorbent member, the absorbent member is likely to maintain flatness, the fit is improved, and leakage of excrement and the like can be suppressed. Further, since the elastic force of the entire elastic member can be weakened by making the elastic member discontinuous, the extension ratio when the elastic member is disposed can be set high accordingly. Therefore, the opening width of the through hole can be easily widened in the region where the elastic member is disposed.

In the absorbent article, it is preferable that, in a state where the front side portion and the back side portion are contracted in the lateral direction, a distance between one end and the other end in the longitudinal direction of the through-hole in at least a part of a region provided below an upper end of the absorbent body in the longitudinal direction is smaller than a distance between one end and the other end in the longitudinal direction of the through-hole provided above the upper end of the absorbent body in the longitudinal direction.

In such an absorbent article, the abdomen-side portion (back-side portion) is easily bent in the front-rear direction (longitudinal direction) using the laterally long through-hole as a starting point by forming the laterally long through-hole having a wide width in the lateral direction and a low height in the longitudinal direction in the lower region. Thus, when the wearer of the absorbent article moves the legs, the absorbent article is likely to deform following the movement of the legs. Therefore, the fit of the absorbent article can be further improved.

In the absorbent article, it is preferable that the absorbent article has a1 st through hole and a2 nd through hole in a region below a position of an upper end of the absorbent body in the longitudinal direction, and a distance between one end and the other end of the 1 st through hole in the lateral direction is different from a distance between one end and the other end of the 2 nd through hole in the lateral direction in a state where the stomach-side portion and the back-side portion are contracted in the lateral direction.

In such an absorbent article, since the through-holes having different shapes are formed in the lower region of the abdomen-side portion (back-side portion), the appearance and the beauty of the absorbent article can be improved.

In the absorbent article, it is preferable that the opening area of the 1 st through-hole and the opening area of the 2 nd through-hole are different in a state where the front side portion and the back side portion are contracted in the lateral direction.

In such an absorbent article, since the portion having a large opening area and the portion having a small opening area are provided in the lower region of the abdomen-side portion (back-side portion), the air permeability of the through-holes can be adjusted by increasing the opening area of the portion that is likely to sweat. This makes it possible to reduce the discomfort caused by wearing the absorbent article.

In the absorbent article, it is preferable that the shape of the gathers formed around the through-holes provided in the region located below the upper end of the absorbent body in the longitudinal direction is different from the shape of the gathers formed around the through-holes provided in the region located above the upper end of the absorbent body in the longitudinal direction.

With such an absorbent article, when the top of the wrinkle formed around the through-hole is pressed against the skin of the wearer when the absorbent article is worn, the pressure applied to the skin of the wearer from the top of the wrinkle is easily dispersed, and the wearer can actually feel a softer skin feel. In addition, the through-holes and the peripheral gathers have different shapes, and thus, a geometric pattern appears to be formed, which can improve the aesthetic appearance of the absorbent article.

In the absorbent article, it is preferable that the plurality of through holes are arranged in a region outside the absorber in the lateral direction along a region that comes into contact with a wearer's groin when the absorbent article is worn.

With such an absorbent article, the air permeability can be efficiently improved for a groin (groin) that is prone to sweat. Therefore, the wearer can be made less likely to feel uncomfortable.

The disposable diaper of the present embodiment is described below

< Structure of Disposable diaper 1 >

Fig. 2 is a plan view of the diaper 1 in an unfolded, extended state as viewed from the skin side. Fig. 3 is a view showing a cross section a-a of fig. 2.

In the following description, the diaper 1 in the state of fig. 1 (worn state) has a "longitudinal direction", a "lateral direction" intersecting with the longitudinal direction, and a "thickness direction" intersecting with the longitudinal direction and the lateral direction. The longitudinal direction of the diaper 1 in the state (developed state) of fig. 2 is also referred to as the "longitudinal direction", one end and the other end of the diaper 1 in the longitudinal direction are referred to as the "upper end", and the substantially central portion C10 of the diaper 1 in the longitudinal direction is referred to as the "lower end". The side in contact with the wearer in the thickness direction is referred to as the "skin side", and the opposite side is referred to as the "non-skin side". A-A in FIG. 2 etc. represents the lateral center. The "extended state" refers to a state in which the diaper 1 is extended so that wrinkles are removed, and specifically, is extended so that the dimensions of the members constituting the diaper 1 (for example, the abdomen-side outer package member 30 and the back-side outer package member 40) are equal to or close to the dimensions of the members alone.

A disposable diaper 1 (hereinafter referred to as "diaper 1") of the present embodiment is a so-called 3-piece pants-type diaper mainly intended to be worn by infants, and includes an absorbent body 10 disposed in the crotch of a wearer, a back-side outer package member (back-side portion) 40, and a stomach-side outer package member (stomach-side portion) 30 covering the stomach-side portion of the wearer.

In the developed state of fig. 2, the absorbent body 10 is laid over from the front side outer package member 30 to the back side outer package member 40 so that the respective ends in the longitudinal direction (one end side and the other end side in the longitudinal direction) thereof overlap with the front side outer package member 30 and the back side outer package member 40, and the absorbent body 10 is joined and fixed to the front side outer package member 30 and the back side outer package member 40 from the skin side by an adhesive or the like. The external shape of the utility model is approximately H-shaped when viewed from the top. Then, the substantially central portion C10 in the longitudinal direction is folded in two as a folded-back position, and when the front side outer package side edge portion 30se, which is the end portion in the lateral direction of the front side outer package member 30, and the back side outer package side edge portion 40se, which is the end portion in the lateral direction of the back side outer package member 40, which are opposed to each other, are joined and connected, a diaper 1 (fig. 1) in which the waist opening 1HB and the pair of leg hole openings 1HL are formed is obtained.

The absorbent body 10 does not overlap with the region of the upper end 30e in the longitudinal direction of the abdomen-side outer package member 30, and the absorbent body 10 overlaps with the portion 30c on the center side in the longitudinal direction of the end 30 e. The absorbent body 10 overlaps the lateral center portion of the abdomen-side outer package member 30, and the absorbent body 10 does not overlap the region 30s laterally outside the lateral end 10e of the absorbent body 10.

Similarly, the absorbent body 10 does not overlap the region of the upper end 40e in the longitudinal direction of the back-side outer package member 40, and the absorbent body overlaps the central portion 40c in the longitudinal direction of the end 40 e. The absorbent body 10 overlaps the lateral center portion of the back-side outer cover member 40, and the absorbent body 10 does not overlap the region 40s laterally outside the lateral end 10e of the absorbent body 10.

As shown in fig. 2 and 3, the absorbent main body 10 includes an absorbent body 11, a front sheet member 13 covering the absorbent body 11 from the skin side, and a back sheet member 15 covering the absorbent body 11 from the non-skin side. The front sheet member 13 is a liquid-permeable sheet member such as a nonwoven fabric. The back sheet member 15 is a sheet member composed of two layers of a liquid-impermeable leakproof sheet 15a such as polyethylene and a liquid-permeable outer sheet 15b such as nonwoven fabric. Further, a three-dimensional gather or a leg gather (not shown) may be formed from the outer sheet 15b or the like.

The absorbent body 11 is an absorbent core formed by laminating liquid absorbent materials, and is capable of absorbing excrement such as urine. The absorbent body 11 may be made of liquid absorbent fibers such as pulp fibers, absorbent polymers (SAP), or the like, and in the present embodiment, the absorbent body 11 has a substantially hourglass shape when viewed from above (fig. 2). The absorbent body 11 may be covered with a liquid-permeable sheet (not shown) such as a tissue paper.

Each of the front-side outer package member 30 and the back-side outer package member 40 is a sheet member formed of a flexible material such as a nonwoven fabric and having a substantially rectangular shape in plan view. As shown in fig. 3, the skin side sheet 31 and the non-skin side sheet 32 are joined to the abdomen-side outer package member 30 so as to overlap in order from the skin side in the thickness direction, and the skin side sheet 41 and the non-skin side sheet 42 are joined to the back-side outer package member 40 so as to overlap in order from the skin side in the thickness direction.

As shown in fig. 3, the non-skin side sheet 32 is folded back toward the lower side of the skin side from the upper end of the abdominal-side outer package member 30, that is, the abdominal-side upper end 30et, to form a folded-back portion 32f in the upper portion of the abdominal-side outer package member 30 in order to improve the tactile sensation of the skin and the durability. Similarly, the non-skin side sheet 42 is folded back downward toward the skin side from the upper end 40et of the back-side outer package member 40 as a starting point to form a folded-back portion 42f in the upper portion of the back-side outer package member 40.

The abdomen-side outer package member 30 includes a sheet member 34 disposed so as to cover the lower end of the folded portion 32f and the upper end of the absorbent main body 10 on the abdomen side from the skin side. Similarly, the back-side outer cover member 40 has a sheet member 44 disposed so as to cover the upper end portion of the back side of the absorbent main body 10 from the skin side at a position lower than the folded-back portion 42 f. The

sheet members

34 and 44 are rectangular sheet members formed of nonwoven fabric or the like, different from the front-side outer package member 30 and the back-side outer package member 40. By providing the

sheet members

34 and 44, the direct contact between the abdomen-side upper edge and the back-side upper edge in the longitudinal direction of the absorbent main body 10 and the skin of the wearer can be suppressed, and the feel of the waist can be improved when worn. Further, the

sheet members

34, 44 can improve the strength of the upper end portion in the longitudinal direction of the stomach-side outer package member 30 and the strength of the upper end portion in the longitudinal direction of the back-side outer package member 40.

A plurality of through holes 50 are provided at predetermined intervals in the longitudinal direction and the lateral direction in the abdominal-side outer package member 30 and the back-side outer package member 40, and the through holes 50 have a predetermined length in the longitudinal direction and penetrate the

outer package members

30 and 40 from the skin side to the non-skin side. The through-hole 50 will be described in detail later.

A plurality of

elastic members

35, 35 · · and the like extending in the transverse direction are arranged between the skin side sheet 31 and the non-skin side sheet 32 of the abdominal-side outer package member 30. The elastic member 35 is bonded and fixed to the skin side sheet 31 and the non-skin side sheet 32 with an adhesive in a state of being stretched in the transverse direction. The plurality of

elastic members

35, 35 are arranged at intervals in the longitudinal direction.

Similarly, a plurality of

elastic members

45, 45 · · and the like extending in the transverse direction are arranged between the skin side sheet 41 and the non-skin side sheet 42 of the back-side outer covering member 40. The elastic member 45 is bonded and fixed to the skin side sheet 41 and the non-skin side sheet 42 with an adhesive in a state of being stretched in the transverse direction. The plurality of

elastic members

45, 45 are arranged at intervals in the longitudinal direction.

The

elastic members

35, 45 give lateral stretchability to the front-side outer package member 30 and the back-side outer package member 40, and form a plurality of wrinkles in the front-side outer package member 30 and the back-side outer package member 40. Most of the wrinkles formed at the ventral outer package member 30 and the dorsal outer package member 40 have a shape extending in the longitudinal direction.

The plurality of

elastic members

35, 45 are provided with side

elastic members

35s, 45s in regions laterally outside the absorbent body 11. At least a part of the side

elastic members

35s and 45s is discontinuous by being cut or the like in a region overlapping with the absorbent body 11 in the vicinity of the widthwise central portion, and the elastic force (contraction force) of the side

elastic members

35s and 45s does not act on the part. This suppresses lateral contraction from acting on the absorbent body 11, and the absorbent body 11 is easily maintained substantially flat, thereby suppressing leakage of excrement and the like.

The plurality of elastic members 35 include an upper elastic member 35t positioned on the uppermost side in the longitudinal direction, a continuous elastic member (lower elastic member) 35m provided in a region below the upper elastic member 35t and continuous from one ventral outer package member side edge portion 30se on the one side in the lateral direction to the other ventral outer package member side edge portion 30se, the above-described side portion elastic member (lower elastic member) 35s, and a lowermost elastic member 35u positioned on the lowermost side in the longitudinal direction and provided at a position farthest below the continuous elastic member 35m and the side portion elastic member 35 s.

In the diaper 1, the

elastic members

35t, 35m, 35s, and 35u are joined and fixed to the abdominal-side outer package member 30 after the extension ratios in the lateral direction are appropriately adjusted. Here, the "extension ratio" of the elastic member means an extension degree when the natural length of the elastic member (rubber band) is 1, and for example, when the extension ratio is 1.2, the elastic member is extended from the natural length by 0.2.

Specifically, the extension ratios of the elastic members are set so that the extension ratio of the side elastic member 35s is higher than the extension ratios of the upper elastic member 35t and the continuous elastic member 35 m. As described above, since the side portion elastic member 35s is discontinuous in the central region in the lateral direction, the elastic force (contractive force) tends to be weaker than the

elastic members

35t and 35 m. Therefore, by setting the extension ratio of the side portion elastic members 35s to be high in advance, the elastic force (contraction force) exerted by the side portion elastic members 35s and the elastic force (contraction force) exerted by the

elastic members

35t and 35m are easily balanced in the laterally outer region of the absorbent body 11. This makes it difficult for variations in stretchability to occur between the elastic members, and prevents the diaper 1 from being deteriorated in fitting properties. The magnitude of the elastic force may be adjusted for the entire region where the side elastic members 35s are disposed (i.e., the region 30s laterally outside the absorbent body 11), and the elastic force may not be adjusted for each side elastic member 35 s. That is, in the case where a plurality of side elastic members 35s are provided, it is not always necessary that all the side elastic members 35s have an extension ratio higher than that of the continuous elastic member 35m or the like.

On the other hand, the lowermost elastic member 35u is discontinuous in the central region in the lateral direction, similarly to the side portion elastic members 35s, but since the lowermost elastic member 35u is disposed along the leg hole opening 1HL, it is preferable to set the extension ratio of the lowermost elastic member 35u lower than that of the side portion elastic members 35 s. This suppresses the elastic force in the vicinity of the leg hole opening 1HL from becoming too high, and thus prevents the wearer from feeling uncomfortable due to excessive tightening of the leg hole when the diaper 1 is worn.

When the elastic force (contraction force) of the elastic member 35 is adjusted, the thickness of the elastic member 35 (the diameter of the elastic band) may be changed instead of changing the extension ratio of the elastic member 35. For example, the side elastic members 35s may be thicker than the upper elastic member 35t and adjusted so that the elastic force of the side elastic members 35s is larger. Further, the elastic force may be adjusted by changing the extension ratio and thickness of the elastic member 35 in combination.

Similarly, the plurality of elastic members 45 include an upper elastic member 45t positioned on the uppermost side in the longitudinal direction, a continuous elastic member (lower elastic member) 45m provided in a region below the upper elastic member 45t and continuous from the rear-side outer package member side edge 40se on one side in the lateral direction to the rear-side outer package member side edge 40se on the other side, a side elastic member (lower elastic member) 45s, and a lowermost elastic member 45u positioned on the lowermost side in the longitudinal direction and provided at a position farthest from the continuous elastic member 45m and the side elastic member 45 s.

The extension ratio (elastic force) of each elastic member is set so that the extension ratio of the side elastic member 45s is higher than the extension ratios of the

elastic members

45t and 45 m. The extension ratio of the lowermost elastic member 45u is set to be lower than the extension ratio of the side elastic member 45 s.

< about the through-hole 50 >

First, the formation of the through-hole 50 is explained. In the manufacture of the diaper 1, the through-hole 50 of the abdomen-side outer package member 30 is formed in the process of manufacturing the abdomen-side outer package member 30. The abdomen-side outer package member 30 is formed by separating a band-shaped abdomen-side outer package member 300, in which a band-shaped skin side sheet 310, an elastic member 350, and a band-shaped non-skin side sheet (not shown) are arranged in this order from the skin side, into the individual abdomen-side outer package members 30.

Fig. 4A is a view showing a part of the band-shaped ventral outer package member 300 in an extended state before the slit S (through hole 50) is formed. Fig. 4B is a diagram showing a part of the band-shaped ventral outer package member 300 in an extended state when the slit S (through hole 50) is formed. Fig. 4C is a view showing a part of the abdomen-side outer package member 30 in a worn state. Fig. 4A, 4B, and 4C are views seen from the skin side, respectively.

Fig. 4A shows a state in which the band-shaped abdominal-side outer package member 300 before the slit S is formed is stretched until the wrinkles of the band-shaped skin-side sheet 310 and the band-shaped non-skin-side sheet are substantially eliminated.

Next, as shown in fig. 4B, a linear slit S extending in the longitudinal direction is formed in the elongated band-shaped ventral outer package member 300 so as to cross a part of the elastic member 350. The slit S is formed by cutting the band-shaped skin side sheet 310, the elastic member 350, and the band-shaped non-skin side sheet using a predetermined cutter. Fig. 4B shows the instant when the slit S is formed by cutting. The slit S is then formed as a through hole as shown in fig. 4C by the elastic member 350. The slit S of the present embodiment is a linear slit, and unlike the case of cutting a shape having a predetermined area, cutting chips are less likely to be generated.

Fig. 4C shows a part of the abdominal-side outer package member 30 in a state where the wearer wears the diaper 1. The outline of the through hole 50 of the abdomen-side outer package member 30 in the worn state is opened to both sides in the lateral direction, and the shape of the through hole 50 is substantially rhombic. This is because, as shown in fig. 4C, the elastic member 35 contracts to pull the periphery of the through hole 50 in the lateral direction. This allows the through-holes 50 to be opened wider in the worn state, thereby further improving the breathability of the diaper 1. By making the opening of the individual through-holes 50 larger, the breathability of the diaper 1 can be ensured with a smaller number of through-holes 50. Further, since the through-hole 50 can be further perforated in the lateral direction by the elastic member 35 in the contracted state even before wearing, a guardian or the like who wears the diaper 1 on a wearer such as an infant can visually recognize the through-hole 50 in appearance, and can recognize improvement in air permeability. The contracted elastic member 35 pulls the nonwoven fabric around the through-hole 50, thereby forming a plurality of wrinkles extending along the contour of the through-hole 50 around the through-hole 50. The skin feel of the diaper 1 can be made softer by the plurality of wrinkles. In particular, when the through-hole is formed by cutting in a predetermined range, the periphery of the through-hole is opened in a substantially flat state, whereas in the present embodiment, the through-hole 50 is formed by the linear slit S, and therefore the nonwoven fabric pulled by the opening is raised around the through-hole 50 to form a plurality of wrinkles. Therefore, the skin feel of the diaper 1 can be further improved.

The through-hole 50 of the back-side outer package member 40 is also formed in the same manner as the through-hole 50 of the stomach-side outer package member 30. In the present embodiment, the description has been made in consideration of the case where the through holes 50 of the front-side outer package member 30 and the back-side outer package member 40 are formed separately, but the present invention is not limited to this. The front outer package member 30 and the back outer package member 40 may be formed integrally, and after the through hole 50 is formed, the front outer package member 30 and the back outer package member 40 may be separated. The slits S may be formed after the absorbent body 10 and the sheet member 34 are overlapped with the abdomen-side outer package member 30, or the absorbent body 10 and the sheet member 34 may be overlapped with the abdomen-side outer package member 30 after the slits S are formed in the abdomen-side outer package member 30. Similarly, the slits S may be formed after the absorbent body 10 and the sheet member 44 are overlapped with the back-side outer package member 40, or the absorbent body 10 and the sheet member 44 may be overlapped with the back-side outer package member 40 after the slits S are formed in the back-side outer package member 40.

Next, the structure of the through-hole 50 will be described. As shown in fig. 2, the plurality of through holes 50 of the abdomen-side outer package member 30 are provided in the region of the abdomen-side outer package member 30 where the folded-back portion 32f, the sheet member 34, and the absorbent body 10 are not provided. Specifically, the region provided below the end portion 30e in the longitudinal direction and below the lower end of the sheet member 34 is provided outside the absorbent body 10 in the lateral direction. The through holes 50 are arranged on one side and the other side of the stomach-side outer package member 30 in the lateral direction so as to be bilaterally symmetrical with respect to the lateral center a-a.

The through-hole 50 is provided in a region below the uppermost upper elastic member 35t of the stomach-side outer package member 30 and above the lowermost elastic member 35u of the stomach-side outer package member 30 in the longitudinal direction. In this region (30s), a part of the continuous elastic member 35m and a part of the side portion elastic member 35s are discontinuous due to the through hole 50. This is because, as described above, the continuous elastic member 350 is cut together with the band-shaped skin-side sheet 310 and the band-shaped non-skin-side sheet when the through-holes 50 are formed. On the other hand, the upper elastic member 35t and the lowermost elastic member 35u are not discontinuous by the through hole 50.

In the present embodiment, the plurality of through holes 50 are arranged in a staggered manner. Fig. 5 is a schematic view showing an enlarged portion B of fig. 2. Fig. 5 schematically shows the arrangement of the plurality of through holes 50 and the wrinkles formed around the through holes 50. In fig. 5, a through hole 50a (1 st through hole), a through hole 50b (2 nd through hole) located diagonally above the through hole 50a and adjacent in the longitudinal direction, a through hole 50c located above the through hole 50a and overlapping the through hole 50a in the lateral direction, a through hole 50d located on the left side (inside) of the through hole 50a in the lateral direction and overlapping the through hole 50a in the longitudinal direction, a through hole 50a located on the right side (outside) of the through hole 50a in the lateral direction and overlapping the through hole 50a in the longitudinal direction are shown, 50d, a through hole 50e located diagonally above and to the right of the through hole 50a and adjacent in the longitudinal direction, a through hole 50g located diagonally above and to the left of the through hole 50c and overlapping the through hole 50b in the transverse direction, and a through hole 50h located diagonally above and to the right of the through hole 50c and overlapping the through hole 50f in the transverse direction and overlapping the through hole 50g in the longitudinal direction.

Further, the elastic member (discontinuous elastic member) 35a overlaps the through-hole 50a, the through-hole 50d, and the through-hole 50e in the longitudinal direction, the elastic member 35b overlaps the through-hole 50b and the through-hole 50f in the longitudinal direction, the elastic member 35c overlaps the through-hole 50c in the longitudinal direction, and the elastic member 35g overlaps the through-hole 50g and the through-hole 50h in the longitudinal direction. In the longitudinal direction, the elastic member (lower elastic member) 35d is provided in a region below the through hole 50a, and the elastic member (upper elastic member) 35e is provided in a region above the through hole 50a and below the through hole 50 b. Similarly, the elastic member 35f is provided between the through hole 50b and the through hole 50c, and the elastic member 35h is provided between the through hole 50c and the through hole 50g (50 h). That is, the

elastic members

35e, 35f, 35g do not overlap with any of the through holes 50 in the longitudinal direction. The

elastic members

35g and 35h are continuous elastic members 35m, the

elastic members

35a, 35b, 35c, 35e, and 35f are side portion elastic members 35s, and the elastic member 35d is the lowermost elastic member 35 u.

As shown in fig. 5, each through-hole 50 has a substantially rhombic shape, but the through-hole 50 is not strictly rhombic and is common to rhombuses in 4 vertexes, i.e., an upper end (upper end et) and a lower end (lower end eb) in the vertical direction, and a right end (right end er) and a left end (left end el) in the horizontal direction. The through hole 50 has a shape that allows recognition of 4 vertices, and most of the contour thereof is not straight but curved. The inner side of the through-hole 50 penetrates from the skin side to the non-skin side, and the wrinkled portions of the skin side sheet 31 and the non-skin side sheet 32 have a shape of being laid down to the inner side or the outer side of the through-hole 50, or protruding to the skin side or the non-skin side. In fig. 5, the through holes 50 are drawn so that the shapes thereof are the same, but the actual shapes are not limited to the through holes 50 being all the same. For example, as described later, the through

holes

50a and 50g may have different opening widths in the lateral direction.

In the lateral direction, the right end er and the left end el of the substantially rhombus are substantially the same position as the cut end of the elastic member 35, respectively. The cut elastic member 35 is not provided inside each through hole 50, and the cut elastic member 35 is discontinuous in the through hole 50 in the lateral direction. This is because the elastic member 35 provided at the formation position of the through-hole 50 is cut together when the through-hole 50 is formed. Therefore, for example, the elastic member 35a is substantially continuous between the left end el of the through hole 50a and the right end er of the through hole 50d, and is not provided inside the through hole 50a and inside the through hole 50 d. Similarly, the elastic member 35b is not provided in the through hole 50b, and the elastic member 35c is not provided in the through hole 50 c. As shown in fig. 5, the elastic member 35e and the elastic member 35d are continuous in a portion X overlapping the through hole 50a in the lateral direction.

No adhesive or the like is provided in a rectangular region (lower left diagonal portion in fig. 5) surrounded by a side g extending in the lateral direction and a side h extending in the longitudinal direction which are circumscribed with the respective through holes 50. In the present embodiment, the skin side sheet 31 and the non-skin side sheet 32 are joined by an adhesive applied to the elastic member 35. Therefore, in the rectangular region, the possibility that the periphery of the through-hole 50 is hardened or the hole is insufficiently formed due to the curing of the adhesive can be reduced. Further, since the adhesive is not cured, a plurality of wrinkles protruding to the skin side and the non-skin side are formed around the through-hole 50 due to the original flexibility of the material such as nonwoven fabric, and a softer skin feeling can be achieved.

Further, in the longitudinal direction, the through-

holes

50a and 50c overlap in the lateral direction. When the distance in the longitudinal direction between the lower end of the through-hole 50a and the lower end of the through-hole 50c is L1 and the length in the longitudinal direction of the through-hole 50 is L2, L1 is greater than L2(L1 > L2).

The distance L3 in the longitudinal direction between the elastic member discontinuous by the through-hole 50 and the elastic member adjacent to the elastic member discontinuous in the longitudinal direction and not discontinuous by the through-hole 50 is shorter than the length L2 of the through-hole 50 (L3 < L2). For example, the distance L3 between the elastic member 35a and the elastic member 35e is smaller than the length L2 in the longitudinal direction of the through hole 50 a.

< > As to the effectiveness of the diaper 1 of the present embodiment

The through-hole 50 of the diaper 1 of the present embodiment can improve air permeability by penetrating from the skin side to the non-skin side, and can adjust the tension of the elastic member 35 by cutting the elastic member 35.

For example, the case of the through-hole 50a and the through-hole 50d overlapping the elastic member 35a in the longitudinal direction in fig. 5 will be described. The

elastic members

35a and 35e are elastic members made of the same material, and are joined and fixed to the skin side sheet 31 and the non-skin side sheet 32 in the same stretched state (stretching ratio) before the slits S (the through

holes

50a and 50d) are formed. The elastic member 35a is cut by the slits S (the through hole 50a and the through hole 50d), and the elastic member 35e is not cut by any of the slits S. Therefore, when Te is defined as the magnitude of the tension in the lateral direction of the elastic member 35e adjacent to the elastic member 35a in the longitudinal direction, and Ta1 is defined as the magnitude of the tension in the lateral direction of the portion of the elastic member 35a provided from the left side (center side) of the through hole 50d to the position overlapping the absorber 11 in the thickness direction, the tension Ta1 is smaller than the tension Te (Ta1 < Te). Similarly, when the magnitude of the tension in the lateral direction of the portion of the elastic member 35a located between the through-hole 50d and the through-hole 50a is Ta2, the tension Ta2 is smaller than the tension Te (Ta2 < Te) and smaller than the tension Ta1(Ta2 < Ta 1).

Further, since the elastic member 35a is discontinuous due to the through

holes

50a and 50d, the elastic member 35a can expand and contract more freely when a force is applied in the longitudinal direction and the lateral direction than when it is continuous. That is, compared to the case of continuous movement, the portion of the elastic member 35a on the left side of the through hole 50d and the portion of the elastic member 35a between the through hole 50a and the through hole 50d can expand and contract more freely with movement, and therefore, the elastic member can easily follow not only movement in the lateral direction but also movement in the vertical direction. This improves the fit of the diaper 1 to the abdomen and buttocks.

By providing the elastic member 35 cut by the slit S (through hole 50) and the elastic member 35 not cut by the slit S (through hole 50) in this manner, the tension of the elastic member 35 can be adjusted, and therefore, the possibility of excessive tightening can be reduced while securing the tightening of the waist, and the fit of the diaper 1 can be improved.

In the diaper 1 of the present embodiment, the through-hole 50 does not overlap the elastic member 35t located on the uppermost side of the diaper 1 in the longitudinal direction. That is, the elastic member 35t is not discontinuous by the through-hole 50. Therefore, since the elastic member 35t positioned on the uppermost side is not cut and an elastic member continuous to the waist opening 1HB can be maintained, even when the through hole 50 is formed to improve air permeability during wearing, the tightening force of the elastic member 35t to the waist of the wearer can be ensured, and thus the possibility of leakage of excrement or the like due to insufficient tightening of the waist opening 1HB can be reduced.

In the present embodiment, the lowermost elastic member 35u disposed in the region below the continuous elastic member 35m and the side elastic member 35s and farthest from the continuous elastic member 35m and the side elastic member 35s does not overlap the through hole 50 in the longitudinal direction. Accordingly, since not only the upper elastic member 35t but also the lowermost elastic member 35u are not discontinuous by the through-holes 50, the conformability of the leg hole opening 1HL can be ensured, and the possibility of leakage of excrement or the like from the leg hole opening 1HL can be reduced.

In the present embodiment, the opening width (corresponding to X in fig. 5) in the lateral direction of the through hole 50 is changed in accordance with the installation position of the through hole 50 in the abdomen-side outer package member 30 and the back-side outer package member 40, thereby improving the breathability when the diaper 1 is worn. Specifically, the through holes 50 are formed such that, with respect to the distance in the lateral direction between the left end el and the right end er in the state in which the diaper 1 is contracted in the lateral direction, the distance in at least a part of the plurality of through holes 50 provided in the region below the position of the upper end 11ta (11tb) of the absorbent body 11 in the longitudinal direction of the abdomen-side outer package member 30 (back-side outer package member 40) is larger than the distance in the through holes 50 provided in the region above the position of the upper end 11ta (11tb) of the absorbent body 11 in the longitudinal direction of the abdomen-side outer package member 30 (back-side outer package member 40). The region below the upper end 11ta (11tb) of the absorber 11 is a region near the crotch and leg girth of the wearer when the diaper 1 is worn, and is a region where moisture such as heat and sweat is likely to be trapped by the wearer moving the legs. Therefore, by increasing the width of the through-holes 50 in this region, heat and moisture are easily released from the through-holes 50 to the outside of the diaper 1, and breathability of the diaper 1 is improved. This suppresses the occurrence of stuffiness and redness when the diaper 1 is worn, and makes it possible to prevent the wearer from feeling uncomfortable.

In addition, the diaper 1 "in a laterally contracted state" is defined as follows. First, in the diaper 1 in the product state, the front-side outer cover member 30 and the back-side outer cover member 40 are pulled outward in the lateral direction to extend to a length that matches or is close to the size of the single members of the front-side outer cover member 30 and the back-side outer cover member 40. After the extended state is continued for 15 seconds, the diaper 1 is released from the pulled state and placed on a flat surface such as a desk. In the diaper 1 laid on a flat surface with the pulled state released, the abdomen-side outer package member 30 and the back-side outer package member 40 contract in the lateral direction by the elastic force (tension) of the elastic member 35. Then, the state after 5 minutes in which the diaper 1 is laid flat in the plane is "a state contracted in the lateral direction". That is, the diaper 1 is contracted in the lateral direction, and thus it can be said that the diaper 1 is in the "natural state".

The lateral opening width of the through hole 50 can be changed by adjusting the elastic force of the elastic member 35. Fig. 6A is a diagram illustrating the through hole 50a in fig. 5. Fig. 6B is a diagram illustrating the through hole 50g of fig. 5. The through-hole 50a in fig. 6A is a through-hole overlapping the side elastic member 35s (35a) in the longitudinal direction, and a part of the side elastic member 35s (35a) is discontinuous in a region overlapping the absorbent body 11 in the widthwise central portion. Further, the through-hole 50g of fig. 6B is a through-hole overlapping with the continuous elastic member 35m (35g) continuous in the transverse direction in the longitudinal direction. In comparison between the through-hole 50a and the through-hole 50g, the opening width Xa in the lateral direction of the through-hole 50a is larger than the opening width Xg in the lateral direction of the through-hole 50 g. This is because, as described above, the extension magnification of the side portion elastic member 35s is set to be higher than the extension magnification of the continuous elastic member 35 m. That is, since the tension (elastic force) T2a acting on both ends in the lateral direction of the through-hole 50a by the side portion elastic member 35s is greater than the tension (elastic force) T2g acting on both ends in the lateral direction of the through-hole 50g by the continuous elastic member 35m, the through-hole 50a is more likely to open in the lateral direction than the through-hole 50g, and the opening width Xa is greater than the opening width Xg (Xa > Xg). Therefore, in the diaper 1, the opening width of the through-hole 50 provided in the region where the side portion elastic member 35s is disposed, that is, the region below the position of the upper end 11ta of the absorbent body 11 is likely to be larger than the opening width of the through-hole 50 provided in the region where the continuous elastic member 35m is disposed, that is, the region above the position of the upper end 11ta of the absorbent body 11.

In this way, in the diaper 1, by adjusting the extension ratio of the elastic member 35, the thickness of the elastic member, and the like, and changing the elastic force acting on the abdominal-side outer package member 30 for each region, even when the slits S are formed under the same conditions, the opening width in the lateral direction of the through-hole 50 can be freely changed, and the air permeability can be improved. Further, the through-hole 50 can be formed with high accuracy without changing the size of the slit S or the like in order to adjust the opening width of the through-hole 50. Further, since a common device can be used for the device (e.g., a cutter) for forming the slit S, an increase in manufacturing cost can be suppressed.

In the state where the diaper 1 is laterally contracted, the longitudinal opening length (the distance between the upper end et and the lower end eb) of at least a part of the plurality of through holes 50 provided in the region below the position of the upper end 11ta of the absorber 11 in the longitudinal direction of the abdomen-side outer package member 30 (the back-side outer package member 40) is smaller than the longitudinal opening length (the distance between the upper end et and the lower end eb) of the through holes 50 provided in the region above the position of the upper end 11ta of the absorber 11 in the longitudinal direction of the abdomen-side outer package member 30 (the back-side outer package member 40). This is because the through-hole 50 is strongly pulled in the lateral direction in the region below the upper end 11ta of the absorbent body 11, and therefore the longitudinal length L2 is likely to contract accordingly. For example, in fig. 6A and 6B, the length (opening height) L2a in the longitudinal direction of the through-hole 50a is smaller than the length (height) L2g in the longitudinal direction of the through-hole 50g (L2g > L2 a). Therefore, in the region below the position of the upper end 11ta of the absorbent body 11, the diamond shape of the through-holes 50 is likely to be horizontally longer than that in the region above. As described above, the region below the upper end 11ta of the absorber 11 is a region closer to the crotch and leg circumferences of the wearer when the diaper 1 is worn. Therefore, when the wearer moves the legs back and forth, it is desirable that the leg be easily bent and deformed in the back and forth direction following the movement of the leg. In the diaper 1 of the present embodiment, since the laterally long through-hole 50 serves as a bending start point in the front-rear direction (longitudinal direction) in this region, the abdomen-side outer cover member 30 (back-side outer cover member 40) is easily deformed in the front-rear direction following the movement of the legs of the wearer, and the fit of the diaper 1 can be further improved. Further, since the plurality of horizontally long through holes 50 are arranged in a horizontal direction and intermittently (see fig. 2 and the like), the rows of the through holes 50 function as folding lines (bending lines such as needle stitches), and the abdomen-side outer package member 30 (back-side outer package member 40) is more easily deformed in the front-rear direction (longitudinal direction).

Note that, in the region above and below the position of the upper end 11ta of the absorbent body 11, the difference between the horizontal opening width X and the vertical opening height L2 of the through-hole 50 means that the shape of the through-hole 50 at the time of opening is different. Therefore, the shape of the wrinkle formed around the through-hole 50 is also different between the region above and the region below the position of the upper end 11ta of the absorbent body 11. This suppresses the application of local pressure when the tops of the wrinkles formed around the through-holes 50 are pressed against the skin of the wearer when the diaper 1 is worn. That is, the pressure applied to the skin of the wearer from the top of the wrinkle is easily dispersed, and the wearer can actually feel a softer skin feel. Since the through-hole 50 and the wrinkles around it have different shapes, it appears that a geometric pattern is formed in the abdomen-side outer package member 30 (back-side outer package member 40), and the appearance of the diaper 1 can be improved.

Further, the opening width X in the lateral direction of each through-hole 50 may be different in a region below the position of the upper end 11ta of the absorbent body 11. For example, in fig. 5, the lateral distances between the left end el and the right end er of the through hole 50a (1 st through hole) and the through hole 50b (2 nd through hole) may be different. With this arrangement, the through-holes 50 having different shapes can be formed in the lower region of the abdomen-side outer package member 30 (back-side outer package member 40), and therefore the appearance and appearance of the diaper 1 can be improved. Similarly, the opening width X in the lateral direction of each through-hole 50 may be different in a region above the position of the upper end 11ta of the absorbent body 11.

The opening area of each through hole 50 may be different in a region below the position of the upper end 11ta of the absorbent body 11. For example, the areas of the openings (i.e., the rhombic areas) of the through holes 50a (1 st through hole) and 50b (2 nd through hole) in fig. 5 may be different from each other. With this arrangement, since the portion having a large opening area and the portion having a small opening area are provided for each region of the abdomen-side outer package member 30 (back-side outer package member 40), it is possible to perform an operation of finely adjusting the air permeability in accordance with the installation position of the through hole 50, such as increasing the opening area of the through hole 50 at a position closer to the leg hole (lower side in the longitudinal direction). This makes it easier to suppress the occurrence of stuffiness and the like when the diaper 1 is worn, and makes it less likely that the diaper will feel uncomfortable when worn. Similarly, the opening areas of the through holes 50 may be different in each region above the position of the upper end 11ta of the absorbent body 11, or the opening areas of the through holes 50 may be different in each region above and below the position of the upper end 11ta of the absorbent body 11.

Even if the opening widths and the areas of the through holes 50 are different from each other, the length of the outer edge of the through hole 50 (the circumferential length of the through hole 50) is constant as long as the length of the slit S is constant. In other words, in each through hole 50, the total value of the distance between the upper end et and the left end el, the distance between the left end el and the lower end eb, the distance between the lower end eb and the right end er, and the distance between the right end er and the upper end et is constant. For example, in fig. 5, the circumference of the outer edge of the 1 st through hole 50a is equal to the circumference of the outer edge of the 2 nd through hole 50 b. That is, the length of the cut portion of the material (for example, nonwoven fabric) is constant in each through-hole 50, and variation in the strength around the through-hole 50 is less likely to occur. Thus, even when the abdomen-side outer package member 30 (back-side outer package member 40) is pulled in the lateral direction or the longitudinal direction, for example, when the diaper 1 is worn, a problem such as a specific region (the periphery of the specific through hole 50) is less likely to be broken, and the strength of the entire diaper 1 can be ensured.

In the present embodiment, the abdominal-side outer package member 30 has the skin-side sheet 31 and the non-skin-side sheet 32, the elastic member 35 is disposed between the skin-side sheet 31 and the non-skin-side sheet 32, and the adhesive is not provided in a rectangular region formed by at least the side g extending in the lateral direction and the side h extending in the longitudinal direction, which is circumscribed by the through hole 50. This reduces the possibility that the periphery of the through-hole 50 is hardened or the hole is insufficiently formed in the rectangular region due to the curing of the adhesive. Further, since the adhesive is not cured, the periphery of the through-hole 50 is appropriately wrinkled due to the original flexibility of the material such as nonwoven fabric, and a softer skin feel can be achieved.

In the present embodiment, the through-hole 50b and the through-hole 50a are adjacent to each other in the longitudinal direction, and an elastic member 35e (see fig. 5) as another elastic member is provided between the through-hole 50a and the through-hole 50b in the longitudinal direction. Thus, even when the tightening force is reduced by providing the

elastic members

35a and 35b that are discontinuous due to the through

holes

50a and 50b, the tightening force of the diaper 1 can be secured by providing the elastic member 35e that is adjacent to the

elastic members

35a and 35b in the longitudinal direction and is not discontinuous due to the through holes 50, and the possibility of the diaper 1 falling off or the like when worn can be reduced.

In the present embodiment, the through-

holes

50a and 50c are at least partially overlapped in the lateral direction, and the longitudinal distance L1 between the through-

holes

50a and 50c is longer than the respective lengths (L2) of the through-

holes

50a and 50 c. This can reduce the possibility of the periphery of the through-hole 50a and the periphery of the through-hole 50c cracking even when a force is applied in the vertical direction when the diaper 1 is worn.

The effectiveness of the diaper 1 has been described using the abdomen-side outer package member 30, but the same applies to the back-side outer package member 40.

Other embodiments are also possible

The embodiments of the present invention have been described above, and the above embodiments are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. It is to be understood that the present invention can be modified and improved without departing from the gist thereof, and the present invention encompasses equivalent technical means. For example, the following modifications can be made.

In the above-described embodiment, the through-holes 50 are formed in the front-side outer package member 30 and the rear-side outer package member 40, respectively, but the present invention is not limited thereto. The through-hole 50 may be formed in either the front-side outer package member 30 or the rear-side outer package member 40. However, the ventilation properties of the diaper 1 can be further improved by forming the through-holes 50 in both the front-side outer cover member 30 and the back-side outer cover member 40.

In the above-described embodiment, the sheet member 34 is provided on the skin side of the abdomen-side outer package member 30, and the sheet member 44 is provided on the skin side of the back-side outer package member 40, but the present invention is not limited thereto. The

sheet members

34 and 44 may be provided on either the front-side outer package member 30 or the back-side outer package member 40, or both the

sheet members

34 and 44 may not be provided.

In the above-described embodiment, the distances between the elastic members 35 adjacent to each other in the longitudinal direction are arranged to be substantially equal, but not limited thereto. The elastic members 35 may be arranged at arbitrary intervals in the longitudinal direction, or may be arranged at different intervals.

Fig. 7 is a plan view of diaper 100 according to another embodiment, as viewed from the skin side. As shown in fig. 7, the through-holes 50 may be provided only on the lower side (30c, 40c) where perspiration is more likely to occur, or the through-holes 50 may be arranged along the region that comes into contact with the inguinal region of the wearer when the diaper 100 is worn. With such an arrangement, the air permeability can be efficiently improved for the groin portion which is likely to sweat. As shown in fig. 7, the through-holes 50 may be arranged substantially in the same manner in the front-side outer package member 30 and the back-side outer package member 40. The arrangement of the through holes 50 can be changed as appropriate.

The diaper 1 of the above embodiment is intended to be worn by infants, but is not limited thereto, and may be intended to be worn by adults. In the above-described embodiment, the disposable diaper 1 of a so-called 3-sheet type is exemplified as an example of the absorbent article, but the present invention is not limited thereto. For example, a two-piece disposable diaper having an outer sheet including a stomach-side portion, a crotch portion, and a back-side portion as a1 st member, and an absorbent body fixed to a skin-side surface of the outer sheet as a2 nd member, and a tape-type disposable diaper may be used.

Description of the reference numerals

1. 100, diapers (absorbent articles); 1HB, waist opening; 1HL, a leg circumference opening; 10. an absorbent main body; 10e, a transverse end; 11. an absorbent body; 11ta, upper end; 11tb, upper end; 13. a surface sheet member; 15. a back sheet member; 30. a ventral outer package member (ventral portion); 30c, part; 30e, end portion; 30s, area; 30et, ventral upper end; 30se, a ventral outer package member side edge portion; 31. a skin side sheet; 32. a non-skin side sheet; 32f, a folded back portion; 34. a sheet member; 35. an elastic member; 35a, an elastic member; 35b, an elastic member; 35c, an elastic member; 35e, an elastic member; 35f, an elastic member; 35g, an elastic member; 35h, an elastic member; 35t, an upper elastic member; 35m, continuous elastic member (lower elastic member); 35s, a side portion elastic member (lower side elastic member); 35u, a lowermost elastic member; 40. a back-side outer package member (back-side portion); 40c, part; 40e, end portion; 40s, area; 40et, dorsal upper end; 40se, a back-side outer package member side edge portion; 41. a skin side sheet; 42. a non-skin side sheet; 42f, a folded back portion; 44. a sheet member; 45. an elastic member; 45t, upper elastic member; 45m, continuous elastic member (lower elastic member); 45f, a side portion elastic member (lower side elastic member); 45u, the lowermost elastic member; 50. a through hole; 50a, a through-hole (1 st through-hole); 50b, a through hole (2 nd through hole); 50c, a through hole; 50d, through holes; 50e, a through hole; 50f, through holes; 50g, through holes; 50h, through holes; 300. a band-shaped ventral outer package member; 310. a band-shaped skin side sheet; 350. an elastic member; 400. a band-shaped backside outer package member; c10, center; et, upper end; eb. A lower end; el, left end; er, right end; s, a slit.

Claims

1. An absorbent article having a longitudinal direction and a transverse direction orthogonal to each other,

the absorbent article includes:

an absorbent main body having an absorbent body having liquid absorbency;

a ventral portion joined to one end side of the absorbent main body in the longitudinal direction and provided on the ventral side of the wearer;

a back side section joined to the other end side of the absorbent main body in the longitudinal direction and provided on the back side of the wearer; and

an elastic member provided in at least either one of the ventral portion and the dorsal portion and extending in the transverse direction,

the absorbent article is characterized in that,

the absorbent article has a plurality of through holes penetrating from the skin side to the non-skin side,

in a state where the stomach-side portion and the back-side portion are contracted in the lateral direction, a distance between one end and the other end in the lateral direction of the through-hole in at least a part of a region provided below an upper end of the absorbent body in the longitudinal direction is larger than a distance between one end and the other end in the lateral direction of the through-hole provided above the upper end of the absorbent body in the longitudinal direction.

2. The absorbent article according to claim 1,

at least either one of the ventral portion and the dorsal portion,

the magnitude of the force with which the lower region is contracted in the lateral direction by the elastic force of the elastic member disposed in the region below the position of the upper end of the absorbent body in the longitudinal direction is larger than the magnitude of the force with which the lower region is contracted in the lateral direction by the elastic force of the elastic member disposed in the region above the position of the upper end of the absorbent body in the longitudinal direction.

3. The absorbent article according to claim 2,

at least either one of the ventral portion and the dorsal portion,

the degree of elongation with respect to the natural length of at least a part of the elastic member joined to a region on the lower side in the longitudinal direction than the position of the upper end of the absorbent body is larger than the degree of elongation with respect to the natural length of the elastic member joined to a region on the upper side in the longitudinal direction than the position of the upper end of the absorbent body.

4. The absorbent article according to any one of claims 1 to 3,

the through-holes are provided on the outer side of the absorber in the lateral direction,

at least a part of the elastic member is discontinuous in a region where the absorbent body and the elastic member are repeated in the thickness direction.

5. The absorbent article according to any one of claims 1 to 3,

in a state where the ventral portion and the dorsal portion are contracted in the transverse direction,

the distance between one end and the other end of the through-hole in the longitudinal direction in at least a part of the through-hole provided in a region lower than the upper end of the absorbent body in the longitudinal direction is smaller than the distance between one end and the other end of the through-hole provided in a region upper than the upper end of the absorbent body in the longitudinal direction.

6. The absorbent article according to any one of claims 1 to 3,

the absorbent core has a1 st through hole and a2 nd through hole in a region below the upper end of the absorbent core in the longitudinal direction,

a distance between one end and the other end of the 1 st through-hole in the lateral direction is different from a distance between one end and the other end of the 2 nd through-hole in the lateral direction.

7. The absorbent article according to claim 6,

the opening area of the 1 st through hole is different from the opening area of the 2 nd through hole.

8. The absorbent article according to any one of claims 1 to 3,

the shape of the wrinkle formed around the through-hole provided in the region located lower than the upper end of the absorbent body in the longitudinal direction is different from the shape of the wrinkle formed around the through-hole provided in the region located upper than the upper end of the absorbent body in the longitudinal direction.

9. The absorbent article according to any one of claims 1 to 3,

the plurality of through-holes are arranged in a region outside the absorbent body in the lateral direction along a region that comes into contact with a wearer's groin when the absorbent article is worn.