CN109862859B

CN109862859B - Absorbent article

Info

Publication number: CN109862859B
Application number: CN201780065590.8A
Authority: CN
Inventors: 深山拓也; 坂口智; 宇田匡志
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2016-10-24
Filing date: 2017-10-13
Publication date: 2021-07-20
Anticipated expiration: 2037-10-13
Also published as: KR20190073449A; WO2018079302A1; AU2017349535B2; JP6668217B2; JP2018068382A; AU2017349535A1; KR102537750B1; CN109862859A

Abstract

Provided is an absorbent article which can easily recognize the introductivity of a region from which feces are discharged and can provide a sense of reassurance during use. The absorbent article is provided with: an absorber (40); and a top sheet (50) which is positioned closer to the skin-facing surface side than the absorber and which is in contact with the wearer. The top sheet has sheet protrusions (51) protruding toward the skin-facing surface and openings (54) provided between the sheet protrusions. The top sheet has: a 1 st region (R1) disposed at least in the rear waist region; and a 2 nd region (R2) disposed at least in the crotch region. The shape of the sheet projection in the 1 st region is different from the shape of the sheet projection in the 2 nd region. The opening is at least arranged in the No. 1 area.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article for absorbing urine and feces.

Background

Conventionally, there is provided an absorbent article for absorbing urine and feces of a wearer, in which an opening (a liquid guiding recess) for introducing excrement is provided in a top sheet (see, for example, patent document 1). The top sheet of patent document 1 is formed with: a plurality of projections projecting toward the skin-facing surface; and an opening disposed between the protrusions and penetrating in the thickness direction of the top sheet.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2009-89965

Disclosure of Invention

Problems to be solved by the invention

The protrusions and openings of the top sheet of patent document 1 are regularly arranged in the same line in the front-back direction and the width direction at a constant interval over the entire top sheet. Therefore, the mother or other wearer may recognize the projection and the opening as a pattern, and may not recognize the presence of the opening for introducing the excrement. The wearer may not be able to grasp the introduction of the body fluid into the top sheet and may not be able to use the absorbent article with ease. The applicant has conducted various investigations and, as a result, has found that: the wearing assistant can grasp the drawing-in property of the region from which the feces are discharged, and thus the wearer can easily feel a sense of security during use.

Accordingly, an object of the present invention is to provide an absorbent article that allows a wearer to easily recognize the introductivity of a region from which feces are discharged and to obtain a sense of security during use.

An absorbent article (disposable diaper 10) of the present disclosure includes: a front waistline region (front waistline region 20), a rear waistline region (rear waistline region 30), and a crotch region (crotch region 25) located between the front waistline region and the rear waistline region; a front-rear direction (front-rear direction L) from the front waistline region toward the rear waistline region, and a width direction (width direction W) orthogonal to the front-rear direction; an absorber (absorber 40) extending to at least one of the front waistline region and the rear waistline region across the crotch region; and a top sheet (top sheet 50) which is positioned closer to the skin-facing surface side than the absorber and which is in contact with the wearer, the top sheet having sheet protrusions (sheet protrusions 51) protruding toward the skin-facing surface side and openings (openings 54) provided between the sheet protrusions. The main point is that the top sheet has: a 1 st region (1 st region R1) disposed at least in the rear waist region; and a 2 nd region (a 2 nd region R2) disposed at least in the crotch region, wherein the shape of the sheet convex portion in the 1 st region is different from the shape of the sheet convex portion in the 2 nd region, and the opening is provided at least in the 1 st region.

Drawings

Fig. 1 is a developed plan view of the disposable diaper of the present embodiment.

Fig. 2 is a sectional view taken along line a-a shown in fig. 1.

Fig. 3 is an enlarged plan view of a part of the top sheet of the disposable diaper shown in fig. 1.

Fig. 4 is a sectional view taken along line B-B shown in fig. 3.

Fig. 5 is a sectional view taken along the line C-C shown in fig. 3.

Fig. 6 is a partially cut-away perspective view schematically showing a region 1 of the top sheet.

Fig. 7 is a partially cut-away perspective view schematically showing a 2 nd region of the topsheet.

Fig. 8 is a perspective view of the top sheet and the absorbent body of modification 1.

Fig. 9 is a cross-sectional view of the top sheet of modification 2.

Fig. 10 is a perspective view of the top sheet according to modification 3.

Detailed Description

At least the following matters will become clear from the description of the present specification and the accompanying drawings.

An absorbent article comprising:

a front waistline region, a back waistline region, and a crotch region between the front waistline region and the back waistline region;

a front-rear direction from the front waistline region toward the rear waistline region, and a width direction orthogonal to the front-rear direction;

an absorber extending across the crotch region to at least one of the front waistline region and the rear waistline region; and

a top sheet which is positioned closer to the skin-facing surface side than the absorber and contacts the wearer,

the top sheet has an opening provided between sheet protrusions protruding toward the skin-facing surface,

in the absorbent article, it is preferable that,

the topsheet has: a 1 st region disposed at least in the rear waist region; and a 2 nd region disposed at least in the crotch region,

the shape of the sheet projection of the 1 st region and the shape of the sheet projection of the 2 nd region are different,

the opening is at least arranged in the No. 1 area.

According to such an absorbent article, the 1 st region is disposed at least in the rear waist region and includes a region from which feces are discharged. The 2 nd region is disposed at least in the crotch region and includes a region from which urine is discharged. The shape of the sheet convex portion of the 1 st region is different from the shape of the sheet convex portion of the 2 nd region, and therefore, the wearer-assistant can easily recognize the 1 st region. Further, since the shape of the sheet convex portion in the 1 st region is different from the shape of the sheet convex portion in the 2 nd region, the wearer can grasp the difference between the performance of the top sheet disposed in the crotch region and the performance of the top sheet disposed in the rear waist region, and can obtain a feeling of security that urine and feces are appropriately absorbed.

When feces are discharged onto the 1 st region, the feces are accommodated in the space between the sheet convex portions and are transferred to the non-skin-facing surface side through the openings between the sheet convex portions. Further, since the feces are sandwiched by the walls of the sheet convex portions, when the feces temporarily stored between the sheet convex portions come into contact with the skin, the feces can be prevented from coming out from between the sheet convex portions and adhering to the wearer again.

In the absorbent article, it is desirable that,

the absorbent article includes a pair of three-dimensional gathers arranged on both outer sides in the width direction with respect to the center in the width direction of the absorbent article,

each of the three-dimensional gathers has a contracted region contracted in the front-rear direction by an elastic member,

the bending stiffness of the 1 st region is higher than that of the 2 nd region,

the 1 st region is disposed so as to straddle a rear end edge of the contracted region in the front-rear direction.

The 1 st region straddles the rear end edge of the contracted region in the front-rear direction, and therefore, the rigidity in the vicinity of the rear end edge of the contracted region, which serves as a base point of raising of the three-dimensional gather, is increased. Since the rigidity of the standing base points of the three-dimensional gathers is high, the height of the three-dimensional gathers is easily ensured. Thus, side leakage of feces in the rear waistline region can be prevented. Further, by securing the height of the three-dimensional gathers, the top sheet is prevented from being covered with the three-dimensional gathers, and the function of guiding the discharged feces to between the convex portions of the first region sheet can be continuously exhibited.

In the absorbent article, it is desirable that,

the absorbent body has a bending guide portion extending in the width direction and guiding bending of the absorbent article,

the bend guide portion is provided on the front side of the 1 st region in the front-rear direction within a range in which the constricted region is disposed.

The range in which the constricted region is arranged in the front-rear direction is constricted in the front-rear direction by the constriction of the constricted region. When a force that contracts due to the contraction region acts, the absorbent article deforms with the bend guide portion as a base point. By deforming the first region with the bending guide portion located on the front side of the first region as a base point, the contraction force of the contraction region is absorbed, and the first region 1 can be kept flat, and the function of introducing feces can be continuously exerted.

In the absorbent article, it is desirable that,

the height of the sheet projection of the 1 st region is higher than the height of the sheet projection of the 2 nd region.

Since the height of the sheet convex portion in the 1 st region is higher than the height of the sheet convex portion in the 2 nd region, the wall of the sheet convex portion with feces interposed therebetween can be formed relatively high. Since the walls of the sheet protrusions sandwiching the feces are high, the feces temporarily stored between the sheet protrusions are sandwiched by the walls, and the feces are easily held. As a result, when the skin of the wearer comes into contact with the surface of the stored feces, the feces can be continuously held, and the feces can be prevented from coming out and adhering to the wearer again.

In addition, since the height of the sheet convex portion in the 1 st region is relatively high, the gap between the skin and the absorbent body becomes large in the 1 st region. The air permeability is high, the air in the absorbent article is easy to flow out, and the stuffiness can be restrained. Before feces are contained between the sheet protrusions in the 1 st region, the thickness of the top sheet changes between a state in which the sheet protrusions are crushed by body pressure applied to the 1 st region and a state in which the sheet protrusions stand up without body pressure applied to the 1 st region. Since the height of the sheet convex portion in the 1 st region is relatively high, the amount of change in the thickness of the top sheet due to the presence or absence of body pressure becomes large, air flows more easily, and the effect of suppressing stuffiness is easily obtained. On the other hand, since the height of the sheet convex portions in the 2 nd area is relatively low, the storage space between the sheet convex portions becomes small, and the flow of the feces stored in the 1 st area to the 2 nd area can be suppressed. Further, a large amount of feces can be contained between the sheet protrusions in the 1 st region, and the feces can easily pass through the openings due to their own weight, and the amount of feces guided to the absorbent body via the openings can be increased.

In the absorbent article, it is desirable that,

the pitch of the sheet convex portion of the 1 st region is longer than the pitch of the sheet convex portion of the 2 nd region.

Since the pitch of the sheet convex portions in the 1 st region is longer than the pitch of the sheet convex portions in the 2 nd region, the space between the sheet convex portions in the 1 st region becomes large, and the feces storage space can be formed large. Therefore, the feces discharged to the top sheet are contained between the sheet convex portions and are less likely to remain on the sheet convex portions. Can inhibit feces from continuously contacting with skin of wearer, and improve wearing feeling. Further, a large amount of feces can be held between the sheet convex portions in the 1 st region, and the weight of the feces increases. In the top sheet having fibers, the weight of feces increases, and moisture contained in the feces is likely to permeate into the absorbent body through the gaps between the fibers. Therefore, moisture in feces can be rapidly transferred to the absorbent body, and the soft feces containing much moisture can be inhibited from continuously adhering to the skin.

In the absorbent article, it is desirable that,

a fused portion formed by fusing fibers constituting the top sheet is formed at an edge portion of the opening.

By forming the welded portion at the edge of the opening, the strength of the opening is improved, and the shape of the opening is easily maintained. Thus, the introduction of excrement can be maintained.

In the absorbent article, it is desirable that,

the absorbent body has absorption convex parts protruding toward the skin-facing surface and absorption concave parts provided between the absorption convex parts,

the opening of the 1 st region is disposed in a region overlapping with the absorption convex portion.

In the region where the absorption convex portion and the opening overlap, the distance between the opening and the absorber is short, and the body fluid introduced through the opening can be quickly absorbed by the absorber. Thus, the introduction of excrement can be improved.

In the absorbent article, it is desirable that,

the opening of the 1 st region is disposed in a region overlapping with the absorption recess.

In the region where the absorption recess and the opening overlap, a space for accommodating feces can be formed on the non-skin-facing surface side of the opening, and the feces introduced through the opening can be introduced into the space. Thus, the introduction of excrement can be improved.

In the absorbent article, it is desirable that,

the sheet convex portion has a convex wall portion extending toward the skin-facing surface side,

the rising angle of the projecting wall portion in the 1 st region is larger than the rising angle of the projecting wall portion in the 2 nd region.

The rising angle of the convex wall portion in the 1 st region is larger than that of the convex wall portion in the 2 nd region, and the convex wall portion in the 1 st region has a relatively steep inclination. Therefore, the excrement contained between the sheet convex portions in the 1 st region is held with the excrement interposed therebetween, and the temporarily contained excrement can be prevented from coming out from between the sheet convex portions. The rising angle of the convex wall portion in the 2 nd area is smaller than that of the convex wall portion in the 1 st area, and the convex wall portion in the 2 nd area has a relatively gentle slope. The 2 nd region is disposed at least in the crotch region. The crotch region is more closely attached to the skin of the wearer than the rear waistline region. Since the convex wall portion in the 2 nd area is gently inclined, even when the 2 nd area is in close contact with the skin, the contact of the sheet convex portion with the skin can be made soft.

In the absorbent article, it is desirable that,

the topsheet is provided with fibers that,

a space is formed between the sheet convex portion and the absorber,

the fibers in the convex wall portion have more fibers oriented in the thickness direction of the top sheet than the fibers oriented in the front-rear direction and the width direction.

The sheet convex portions are less likely to be crushed, and the space on the non-skin-facing surface side of the sheet convex portions is maintained, so that the touch to the skin is soft, and the wearer can obtain a soft touch. Further, since the fibers of the convex wall portion contain many fibers oriented in the thickness direction, the body fluid can be easily guided in the thickness direction by the convex wall portion. Therefore, even when the sheet is configured such that the height of the convex portion is high, the bodily fluid in the convex portion can be quickly guided to the absorbent body side.

In the absorbent article, it is desirable that,

between the sheet convex portions of the 1 st region are provided: a bottom portion extending in the front-rear direction and the width direction; and an intermediate portion projecting toward the skin-facing surface side with respect to the bottom portion,

the top of the intermediate portion is located on the non-skin-facing surface side of the top of the sheet convex portion in the 1 st region.

By providing the intermediate portion between the sheet convex portions in the 1 st region, the excrement in the space between the sheet convex portions is difficult to spread in the planar direction including the front-rear direction and the width direction. Therefore, the feces can be quickly guided to the absorbent body side, and the increase in the area where the feces adhere to the skin can be suppressed.

In the absorbent article, it is desirable that,

a waist holding portion extending in the width direction and configured to hold the absorbent article to a body of a wearer, the waist holding portion being provided in the front waistline region and the back waistline region,

the rear end edge of the 1 st region is positioned on the front side of the waist holding unit.

The waist holding portion is a region for holding the absorbent article on the body, and is easily brought into close contact with the body. Since the 1 st region is separated from the waist holding portion, the feces contained between the sheet protrusions of the 1 st region can be easily kept separated from the skin of the wearer. In addition, in the structure in which the sheet convex portion in the 1 st region is higher than the sheet convex portion in the 2 nd region, the sheet convex portion in the 2 nd region is less likely to adhere to the skin, and the feeling of incongruity in the crotch region due to the sheet convex portion in the 2 nd region can be suppressed.

In the absorbent article, it is desirable that,

groove wall parts extending to the non-skin-facing surface side are provided between the sheet convex parts,

the opening is provided in the groove wall portion.

By forming the opening in the groove wall portion extending toward the non-skin-facing surface side, a space is easily formed between the absorbent body disposed on the non-skin-facing surface side of the top sheet and the opening. By forming a space between the opening and the absorbent body, excrement that has passed through the top sheet can be temporarily held, and the introduction property can be improved.

In the absorbent article, it is desirable that,

the sheet protrusions in the 1 st region are arranged in a staggered pattern.

The spaces between the sheet convex portions are not continuous in the front-rear direction or continuous in the width direction, and therefore spreading of feces in the planar direction can be suppressed.

In the absorbent article, it is desirable that,

the sheet convex portion of the 1 st region extends in the front-rear direction,

a cutout portion that cuts off a space extending in the front-rear direction between the sheet protrusions is provided between the sheet protrusions in the 1 st region.

Since the cut-off portion is provided to cut off the space extending in the front-rear direction, the spread of the feces contained in the sheet recess in the front-rear direction can be suppressed.

In the absorbent article, it is desirable that,

the height of the sheet convex part is more than 0.3mm and less than 10.0mm,

the pitch of the sheet convex part is more than 0.3mm and less than 10.0 mm.

According to the sheet convex part configured as above, the uncomfortable feeling of the appearance caused by the excessive conspicuousness of the sheet convex part is suppressed, and the wearer can easily obtain a feeling of reassurance. Further, since the sheet convex portion can be visually recognized, a feeling of security with respect to the absorption performance by the sheet convex portion can be easily obtained.

In the absorbent article, it is desirable that,

the outer edge of the top sheet is positioned further inward in the width direction than the outer edge of the absorbent body,

an auxiliary sheet positioned on the skin-facing surface side of the absorbent body is provided on the outer side in the width direction with respect to the outer edge of the absorbent body,

the auxiliary sheet and the top sheet are formed of a nonwoven fabric,

the distance between fibers of the auxiliary sheet is longer than the distance between fibers of the top sheet.

The distance between the fibers of the auxiliary sheet is relatively long, and therefore, the body fluid is easily introduced by the auxiliary sheet. Since the auxiliary sheet having higher drawing properties is disposed at a position further outward in the width direction than the outer edge of the top sheet, the excrement spreading outward in the width direction across the top sheet can be drawn into the absorbent body by the auxiliary sheet, and leakage of the excrement can be further suppressed.

In the absorbent article, it is desirable that,

in the stretched state of the absorbent article, the outer edge of the top sheet is positioned further outward in the width direction than the inner edges of the three-dimensional gathers.

Since the outer edge of the top sheet is positioned further outward in the width direction than the inner edges of the three-dimensional gathers in the extended state of the absorbent article, the top sheet is disposed over the entire region between the inner edges of the three-dimensional gathers in the pre-use state of the absorbent article. The wearer can visually recognize the sheet protrusions and openings of the top sheet to provide a feeling of security with respect to the absorption performance, and can feel that the arrangement region of the top sheet is large to provide a further feeling of security.

The disposable diaper of the present embodiment is described below

Next, an embodiment of a disposable diaper 10 as an absorbent article of the present invention will be described with reference to the drawings. The absorbent article of the present invention is not limited to a disposable diaper, and includes an absorbent pad to be worn on underwear or a diaper. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the ratio of the respective dimensions and the like are different from the actual ratio of the respective dimensions. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, the drawings may include portions having different dimensional relationships and ratios from each other.

(1) Overall schematic structure of disposable diaper

Fig. 1 is a developed plan view of a disposable diaper 10 of the present embodiment. The developed plan view shown in fig. 1 is a view showing an extended state in which stretchable portions such as a three-dimensional gather and a waist stretch portion are extended to a state in which no wrinkle is formed in the topsheet 50, the side sheet 70, and the like constituting the disposable diaper. Fig. 2 is a sectional view taken along line a-a shown in fig. 1.

The disposable diaper 10 has a front waistline region 20, a crotch region 25, and a rear waistline region 30. The front waistline region 20 is a portion that contacts the front waistline portion (abdomen portion) of the wearer. The back waistline region 30 is a portion that contacts the back waistline portion (back portion) of the wearer. The crotch region 25 is located between the front waistline region 20 and the rear waistline region 30. In the present embodiment, the direction from the front waistline region 20 to the rear waistline region 30 is referred to as the front-rear direction L, the direction perpendicular to the front-rear direction L is referred to as the width direction W, and the direction extending toward the skin-facing surface side T1 and the non-skin-facing surface side T2 of the wearer is referred to as the thickness direction T.

The disposable diaper 10 has an absorber 40. The absorber 40 extends across the crotch region 25 toward at least one of the front waistline region 20 and the back waistline region 30. The absorber 40 of the present embodiment is disposed so as to straddle the front waistline region 20, the crotch region 25, and the rear waistline region 30. The absorber 40 has an absorbent core 40a and a core wrap 40 b.

The 1 st low basis weight portion 41 extending from the outer edge (outer end in the width direction) of the absorbent core 40a toward the inside in the width direction W is formed in the crotch region 25 of the absorber 40. The 1 st low basis weight portions 41 are disposed at both outer edges of the absorbent core 40a, respectively, and are disposed at intervals in the front-rear direction L. The 2 nd low basis weight portion 42 extending from the rear end edge of the absorbent core 40a toward the front is formed in the rear waistline region 30 of the absorbent core 40 a. The 2 nd low area weight portion 42 is formed so that the length in the width direction thereof becomes shorter toward the front side. The 1 st and 2 nd low

basis weight portions

41 and 42 are portions where the basis weight of the absorbent material is lower than the basis weight of the absorbent material of the surrounding absorbent core. The 1 st and 2 nd low

basis weight portions

41 and 42 of the present embodiment are notches. The 1 st and 2 nd low

basis weight portions

41 and 42 may not be provided.

A liquid-permeable top sheet 50 is provided on the skin-facing surface side T1 of the absorber 40. The top sheet 50 constitutes a skin contact surface of the disposable diaper 10 and contacts the wearer. The topsheet 50 is disposed so as to straddle the front waistline region 20, the crotch region 25, and the back waistline region 30. The top sheet 50 has fibers, and specifically, can be formed of a nonwoven fabric. The outer edge of the top sheet 50 is positioned further inward in the width direction than the outer edge of the absorber 40. The topsheet 50 is described in detail later.

An auxiliary sheet 45 (see fig. 2) is provided between the top sheet 50 and the absorber 40. The outer edge of the auxiliary sheet 45 is located outward in the width direction W from the outer edge of the top sheet 50. The auxiliary sheet covers the skin-facing surface side of the absorber 40 in a region outside the top sheet 50 in the width direction. The auxiliary sheet 45 is formed of a nonwoven fabric. The distance between the fibers of the auxiliary sheet 45 is longer than that of the top sheet 50. The distance between the fibers of the auxiliary sheet is relatively long, and therefore, the body fluid is easily introduced by the auxiliary sheet. Since the auxiliary sheet having higher introducing property is disposed at the position on the outer side in the width direction than the outer edge of the top sheet, the feces spreading to the outer side in the width direction over the top sheet can be introduced into the absorbent body by the auxiliary sheet, and leakage of the feces can be suppressed. Further, the auxiliary sheet may not be provided. In the form without the auxiliary sheet, the top sheet is provided so as to cover the outer edge of the absorbent body.

The distance between fibers can be measured by mercury porosimetry (manufactured by shimadzu corporation) according to the mercury intrusion method (JIS R1655) using a mercury porosimeter or the like. In this mercury intrusion method, information on the structure of a fiber structure (a top sheet and an auxiliary sheet) as an object to be measured is obtained by measuring the pressure applied to mercury when mercury is intruded into spaces between structural fibers of the fiber structure and the volume of mercury intruded into spaces between the structural fibers of the fiber structure.

Specifically, the distance between fibers of the fiber structure can be measured by the following procedure using a mercury porosimeter.

1) A fiber structure as an object to be measured was cut into 24mm × 15mm to prepare a sample for measurement. 3 sheets of the measurement sample were prepared.

2) After 3 measurement samples were placed in sample cells of a mercury porosimeter (manufactured by shimadzu corporation) so as not to overlap each other, the pressure applied to mercury was gradually changed, and the pressure was applied to spaces between structural fibers pressed into a fiber structure (that is: pores) of mercury (i.e.: pore volume). The measurement was carried out at 22 ℃ and 65% RH.

3) The pore diameter D (μm) of the fine pores was calculated according to the following formula (1) (that is: the distance (μm) between fibers of the fiber structure), and the relationship between the pore diameter D and the pore volume is obtained as a distribution curve (differential-integral curve) of the pore diameter D. Further, various measurement conditions in the following formula (1) are as follows: the surface tension of mercury is 0.483N/m, the contact angle is 130 DEG, and the mercury pressure is 0 to 414MPa (absolute pressure).

Formula (1) D ═ 4 γ cos θ/P

(wherein D represents pore diameter (distance between fibers), γ represents surface tension of mercury, θ represents contact angle, and P represents pressure.)

A liquid impermeable backsheet 60a is provided on the non-skin facing surface side T2 of the absorber 40. An outer sheet 60 is provided on the non-skin-facing surface side of the back sheet.

A pair of three-dimensional gathers 80 are disposed on both outer sides in the width direction of the disposable diaper 10 with respect to the center in the width direction. The three-dimensional gather 80 is an erectable gather that can be erected to the wearer side. The three-dimensional gather 80 is formed of the side sheet 70 and the side elastic member 71 as an elastic member.

A side elastic member 71 that expands and contracts in the front-rear direction L is disposed on the inner edge side of the side sheet 70. The pair of three-dimensional gathers 80 are substantially axisymmetric with respect to the center in the width direction of the disposable diaper as the symmetry axis. Each three-dimensional gather 80 has: a standing part 83 having a side elastic member 71 that expands and contracts in the front-rear direction and standing up toward the wearer; a 1 st fixing portion 81 located on the outer side in the width direction than the rising portion 83 and serving as a base point of rising of the rising portion 83; and a 2 nd fixing portion 82 which is located at both outer sides in the front-rear direction L than the rising portion 83 and serves as a base point of rising of the rising portion 83. The front end edge of the standing portion 83 coincides with the rear end edge of the 2 nd fixing portion 82 disposed in the front waistline region 20, and the rear end edge of the standing portion 83 coincides with the front end edge of the 1 st fixing portion 81 disposed in the rear waistline region 30.

The side sheet 70 covers the outer side edge of the topsheet 50 and the outer side edge of the auxiliary sheet 45. In the extended state of the absorbent article, the inner edges of the three-dimensional gathers (inner edges of the side sheet 70) are positioned further inward in the width direction than the outer edges of the top sheet. Since the outer edge of the top sheet is positioned further outward in the width direction than the inner edges of the three-dimensional gathers in the extended state of the absorbent article, the top sheet is disposed over the entire region between the inner edges of the three-dimensional gathers in the pre-use state of the absorbent article. The wearer can visually recognize the top sheet to provide a feeling of security with respect to the absorption performance, and can further provide a feeling of security by feeling that the arrangement region of the top sheet is large.

The side sheet 70 is joined to the top sheet 50 or the auxiliary sheet 45 in the 1 st fixing portion 81 and the 2 nd fixing portion 82. The standing portion 83 is provided between the 2 nd fixing portions 82 in the front-rear direction L, and is not joined to the top sheet 50, and therefore can stand from the top sheet 50 or the like. The rising portion 83 rises toward the wearer side in a state where the side elastic member is contracted. The standing portion 83 stands up toward the wearer side in a state where the disposable diaper is worn. The rising portion 83 has a contracted region 84 in which the side elastic member 71 is arranged to be contractible. The contracted region 84 is a region where the lower elastic member 71 is joined in an extended state in which the disposable diaper is extended. The contracted region 84 is a concept of the rising portion 83 excluding a region where the side elastic member 71 is not disposed, excluding a region where the side elastic member 71 in a non-stretched state is joined, and excluding a region where the side elastic member 71 is not joined to the side sheet 70. The three-dimensional gathers 80 form a wall rising toward the skin-facing surface side T1 at the outer edge of the absorber 40, and prevent side leakage of excrement.

Leg hole openings 13 arranged around the legs of the wearer are formed in the outer edge of the disposable diaper 10. The disposable diaper 10 is provided with a pair of leg stretch units 75, and the pair of leg stretch units 75 are disposed on the inner side in the width direction than the leg hole openings 13 and are stretchable in the front-rear direction L. The leg stretch units 75 are respectively disposed at positions inward in the width direction of the left and right leg hole openings 13.

The pair of fastening tapes 90 extend outward in the width direction W with respect to the side sheet 70 in the rear waistline region 30. The fastening tape 90 is attached to the side sheet 70. The fastening tape 90 has a fastening portion 91 that fastens to a target portion 95 of the front waistline region 20. The fixing portion 91 is a portion provided with, for example, a snap hook. The disposable diaper 10 is held on the body of the wearer by fixing the fastening tape 90 to the target portion 95 of the front waistline region 20. The region between the fastening portions 91 of the pair of fastening tapes is a region to be held on the body when worn, and constitutes a waist holding portion.

The target portion 95 is provided on the surface of the outer sheet 60 of the front waistline region 20 on the non-skin-facing surface side T2. The target portion 95 is configured to receive the engagement hook of the hook and loop fastener 90, and functions as a loop of a hook-and-loop engagement system. The disposable diaper may be a pants-type diaper without the fastening tape 90 and the target portion 95. In the case of a pants-type diaper, the region between the side joint portions joining the front waistline region and the back waistline region constitutes a waistline retaining unit.

The disposable diaper 10 has a waist stretch unit 85 which is stretchable in the width direction. The waist stretch unit 85 is disposed in the rear waistline region 30. The waist portion stretching portion 85 is disposed between the pair of the fastening tapes 90 in the width direction, and is contracted between the fastening tapes 90 in the width direction. The waist stretching portion 85 may not be provided.

(2) Structure of top sheet

Next, the structure of the top sheet 50 will be described in detail. FIG. 3 is an enlarged top view of the topsheet. The topsheet 50 has: a sheet convex portion 51 protruding toward the skin-facing surface side T1; and sheet concave portions 52 provided between the sheet convex portions 51. Note that, in fig. 1 and 2, the sheet convex portion 51 and the sheet concave portion 52 are omitted. The sheet convex portions 51 protrude toward the skin-facing surface side T1 of the disposable diaper 10, and the sheet concave portions 52 are spaces between the sheet convex portions 51. The sheet convex portion 51 has a conical shape and is tapered toward the tip of the skin-facing surface side T1. The top of the sheet projection 51 is rounded. The sheet protrusions 51 are arranged at intervals in the front-back direction L and the width direction W, and are arranged in a staggered manner in a plan view. The staggered shape here means a state in which they are not arranged in line in the front-rear direction L and the width direction W, but are arranged offset in at least one of the front-rear direction L and the width direction W. The sheet convex portion 51 has a convex wall portion 59 extending in the thickness direction T. The projecting wall portion 59 extends from the top to the bottom 53 of the sheet projection 51.

The sheet concave portion 52 is a space sandwiched by the sheet convex portions 51. In more detail, the sheet concave portion 52 is a space surrounded by the convex wall portion 59 and the bottom portion 53. The surface of the sheet concave portion 52 on the non-skin-facing surface side T2 is the bottom portion 53, and the skin-facing surface of the sheet concave portion 52 is an imaginary surface connecting the top portions of the projecting wall portions 59. In fig. 4 and 5, the area of the sheet concave portion 52 is indicated by hatching.

The bottom portion 53 extends in the front-rear direction L and the width direction W. Openings 54 are formed between the sheet projections 51. The opening 54 penetrates through the bottom portion 53 in the thickness direction. The sheet convex portion 51, the sheet concave portion 52, the bottom portion 53, and the opening 54 are formed on the entire surface of the top sheet 50. The sheet convex portion 51, the sheet concave portion 52, the bottom portion 53, and the opening 54 may be formed only in a part of the top sheet 50.

The topsheet 50 has a 1 st region R1 and a 2 nd region R2. In fig. 1, the 1 st region R1 and the 2 nd region R2 are indicated by different diagonal lines. The 1 st region R1 is disposed in at least the rear waistline region 30. Thus, the feces are discharged mainly onto the 1 st region R1. When the feces are discharged to the 1 st region R1, the feces are contained in the sheet concave portions 52 between the sheet convex portions 51. The 2 nd region R2 is located forward of the 1 st region R1 and is disposed at least in the crotch region 25. Thus, urine is discharged mainly into the 2 nd region R2. When urine is discharged onto the 1 st region R1, the urine is diffused in the front-back direction L and the width direction W by the sheet concave portion 52 and is guided to the absorber 40. The 2 nd region R2 may be disposed at least on the front side of the 1 st region R1, and the 2 nd region R2 of the present embodiment is disposed in a portion other than the 1 st region R1 in the entire region of the top sheet 50, and the 1 st region R1 is surrounded by the 2 nd region R2 in a plan view.

Fig. 4 and 6 are views schematically showing the topsheet 50 of the region 1R 1. Fig. 5 and 7 are views schematically showing the topsheet 50 of the region 2R 2. The sheet convex portions 51 have the 1 st convex portions 511 as the sheet convex portions 51 of the 1 st region R1 and the 2 nd convex portions 512 as the sheet convex portions 51 of the 2 nd region R2. The sheet concave portion 52 has a 1 st concave portion 521 as the sheet concave portion 52 of the 1 st region R1 and a 2 nd concave portion 522 as the sheet concave portion 52 of the 2 nd region R2. The bottom 53 has a 1 st bottom 531 as the bottom 53 of the 1 st region R1 and a 2 nd bottom 532 as the bottom 53 of the 2 nd region R2. The opening 54 has a 1 st opening 541 as the opening 54 of the 1 st region R1 and a 2 nd opening 542 as the opening 54 of the 2 nd region R2. The opening 54 may be provided in at least the 1 st region R1.

The shape of the topsheet 50 in the 1 st region R1 is different from the shape of the topsheet 50 in the 2 nd region R2. More specifically, at least the shape of the 1 st convex portion 511 and the shape of the 2 nd convex portion 512 are different. The configuration in which the shapes of the sheet protrusions 51 are different means a configuration in which at least a part of the length of the sheet protrusions 51 in the width direction, the length of the sheet protrusions 51 in the front-rear direction L, the height (length in the thickness direction) of the sheet protrusions 51, the pitch of the sheet protrusions 51, and the shape (circular, rectangular, etc.) of the sheet protrusions 51 in a plan view are different. In the top sheet 50 of the present embodiment, the height 511H of the 1 st convex portion 511 is different from the height 512H of the 2 nd convex portion 512, and the pitch P1 of the 1 st convex portion 511 is different from the pitch P2 of the 2 nd convex portion 512. The shape of the 1 st projection 511 and the shape of the 2 nd projection 512 are different, and therefore, the wearer can easily recognize the 1 st region R1. Further, since the shape of the 1 st convex portion 511 is different from the shape of the 2 nd convex portion 512, the wearer can recognize the difference between the performance of the top sheet disposed in the crotch region and the performance of the top sheet disposed in the rear waist region, and can obtain a feeling of security that urine and feces can be appropriately absorbed.

The shape of the 1 st recessed portion 521 and the shape of the 2 nd recessed portion 522 may be different. The configuration in which the shapes of the sheet recesses 52 are different means a configuration in which at least a part of the length of the sheet recess 52 in the width direction W, the length of the sheet recess 52 in the front-rear direction L, the shape of the opening 54 formed in the sheet recess 52, and the position of the opening 54 are different.

The top sheet 50 in the 1 st region R1 has a 1 st projection 511, a 1 st depression 521, an intermediate portion 58, a 1 st bottom 531, and a 1 st opening 541 formed therein. The intermediate portion 58 is provided between the adjacent 1 st convex portions 511. The height of the intermediate portion 58 is lower than the height of the 1 st convex portion 511. The intermediate portion 58 protrudes toward the skin-facing surface side T1 with respect to the 1 st bottom portion 531. The top of the intermediate portion 58 is located closer to the non-skin-facing surface side T2 than the top of the 1 st convex portion 511. The 1 st bottom part 531 is arranged around the intermediate part 58. In the cross section (cross section shown in fig. 4) at the position where the intermediate portion 58 is provided, the top sheet 50 is provided with the 1 st convex portion 511, the 1 st concave portion 521, and the 1 st convex portion 511 in this order, and the 1 st concave portion 521 is provided with the 1 st bottom portion 531, the 1 st opening 541, the 1 st bottom portion 531, the intermediate portion 58, the 1 st bottom portion 531, the 1 st opening 541, and the 1 st bottom portion 531 in this order. Further, the intermediate portion 58 may not be provided, and the 1 st convex portion 511 may be provided instead of the intermediate portion 58.

The top sheet 50 in the 2 nd region R2 has the 2 nd convex part 512 and the 2 nd concave part 522. The topsheet 50 in the 2 nd region R2 does not form an intermediate portion. The 2 nd projections 512 are arranged in a staggered pattern. In the cross section of the 2 nd region R2 (the cross section shown in fig. 5), the 2 nd convex part 512, the 2 nd concave part 522, and the 2 nd convex part 512 are adjacently provided in this order in the top sheet 50, and the 2 nd bottom part 532, the 2 nd opening 542, and the 2 nd bottom part 532 are adjacently provided in the 2 nd concave part 522 in this order.

Since the top sheet 50 is provided with the plurality of sheet recesses 52 and the plurality of sheet protrusions 51, a space is formed between the top sheet 50 and the absorber 40. By forming a space between the top sheet 50 and the absorber 40, the body fluid introduced by the top sheet 50 can be introduced into the space, and the absorber can rapidly absorb excrement, thereby suppressing the body fluid from remaining on the top sheet.

In the top sheet 50 configured as described above, when feces are discharged to the 1 st region R1, the feces are contained in the 1 st concave portion 521 between the 1 st convex portions 511. The feces are sandwiched by the 1 st convex portion 511 and remain in the 1 st concave portion 521. Since feces are contained in the 1 st recess 521, the contact area between the wearer and feces is reduced. Since the feces is sandwiched between the walls of the 1 st convex portions 511, when the feces once contained between the 1 st convex portions 511 comes into contact with the skin, the feces can be prevented from coming out between the 1 st convex portions and adhering to the wearer again. Therefore, the area of the skin to which feces adhere can be suppressed from increasing. By providing the intermediate portion 58 between the 1 st convex portions 511, the excrement in the space between the 1 st convex portions 511 is less likely to spread along the front-rear direction L and the width direction W. The 1 st convex portions 511 are arranged in a staggered manner, and the 1 st concave portions 521 are cut off in the front-rear direction L and the width direction W. Therefore, the stools contained in the 1 st recess 521 are difficult to spread in the front-rear direction L and the width direction W. The loose stool containing much water is transferred to the absorber 40 through the 1 st opening 541 of the 1 st recess 521.

In the top sheet 50 thus configured, when urine is discharged to the 2 nd region R2, the urine spreads in an inclined direction inclined with respect to the rear direction L and inclined with respect to the width direction W via the 2 nd concave portions 522 between the 2 nd convex portions 512. The urine has high fluidity and spreads in the planar direction along the 2 nd bottom portion 532 while being transferred toward the absorbent body 40 via the 2 nd opening 542 formed in the 2 nd bottom portion 532. In this way, urine is diffused in the 2 nd region R2, urine is rapidly transferred to the absorbent body, and soft feces and body fluid are transferred to the absorbent body 40 in the 1 st region R1, while solid feces are continuously retained, whereby attachment of body fluid and soft feces to the skin of the wearer can be suppressed, and the wearing feeling can be improved. Urine and feces having different properties can be properly absorbed by the region 1R 1 and the region 2R 2 of the topsheet.

The height (length from the 1 st bottom 531 to the top of the 1 st protrusion 511, corresponding to the height 511H of the 1 st protrusion 511) R1H of the top sheet 50 in the 1 st region R1 is higher than the height (length from the 2 nd bottom 532 to the top of the 2 nd protrusion 512, corresponding to the height 512H of the 2 nd protrusion 512) R2H of the top sheet 50 in the 2 nd region R2. Since the height of the top sheet 50 in the 1 st region R1 is relatively high, the skin of the wearer can be separated from the absorber 40 in the 1 st region R1, and the bodily fluid absorbed by the absorber 40 is less likely to return to the skin side, and the skin of the wearer is more likely to be kept in a dry state.

Height 511H of 1 st convex portion 511 (length from 1 st bottom 531 to top of 1 st convex portion 511) is higher than height 512H of 2 nd convex portion 512 (length from 2 nd bottom 532 to top of 2 nd convex portion 512). The feces discharged to the 1 st region R1 are contained in the 1 st concave portion 521 between the 1 st convex portions 511. At this time, since the height 511H of the 1 st convex portion 511 is higher than the height 512H of the 2 nd convex portion 512, the wall of the 1 st convex portion 511 can be formed comparatively high. Since the wall with the feces interposed therebetween is high, the feces once stored in the 1 st recess 521 can be easily held by the 1 st projection 511. As a result, when the skin of the wearer comes into contact with the surface of the feces contained in the 1 st concave portion 521, the feces can be continuously held in the 1 st concave portion 521, and the feces can be prevented from coming out of the 1 st concave portion 521 and adhering to the wearer again.

In addition, since the height of the 1 st projection 511 is relatively high, the gap between the skin and the absorber 40 becomes large in the 1 st region R1. The air permeability is increased, and the air in the diaper flows out to the outside of the diaper, so that the stuffiness can be suppressed. Before feces are contained between the 1 st protrusions 511, the thickness of the top sheet 50 changes between a state in which body pressure is applied to the 1 st region R1 and the 1 st protrusions 511 are crushed and a state in which body pressure is not applied to the 1 st region R1 and the 1 st protrusions 511 are raised. Since the height of the 1 st projection 511 is relatively high, the difference in thickness of the top sheet 50 due to the presence or absence of body pressure becomes large, air flows more easily, and the effect of suppressing stuffiness is easily obtained. Further, a large amount of feces can be stored between the 1 st protrusions 511, and the feces can easily pass through the openings 54 due to their own weight, so that the amount of feces guided to the absorber 40 through the openings 54 can be increased.

On the other hand, since the height 512H of the 2 nd convex portion 512 is lower than the height 511H of the 1 st convex portion 511, the touch of the skin in the 2 nd region R2 can be improved. The crotch region 25 is in contact with the excretory opening of the wearer. The crotch region 25 is in close contact with the skin of the wearer as compared with the rear waistline region 30. Since the height 512H of the 2 nd convex portion 512 located in the 2 nd region R2 of the crotch region 25 is suppressed, even when the skin is in close contact with the crotch region where the 2 nd region R2 is located, the touch of the 2 nd convex portion 512 to the skin can be softened. The touch feeling of the skin is improved, and the wearing feeling of the wearer is improved. From the viewpoint of improving the wearing feeling, the area of the 2 nd region R2 is preferably larger than the area of the 1 st region R1. By setting the area of the 2 nd region R2 suitable for the skin feel to be large, the wearing comfort can be further improved. Further, since the height of the 2 nd convex portion 512 is relatively low, the storage space of the 2 nd concave portion 522 is reduced, and the flow of the stool stored in the 1 st region R1 to the 2 nd region R2 can be suppressed.

The pitch P1 of the 1 st convex part 511 is longer than the pitch P2 of the 2 nd convex part 512. The space between the 1 st convex portions 511 is increased, and the feces storage space can be formed large. Therefore, the feces discharged to the top sheet 50 are contained between the 1 st convex portions 511, and are less likely to remain on the 1 st convex portions 511. Can inhibit feces from continuously contacting with skin of wearer, and improve wearing feeling. Further, a large amount of feces can be held between the 1 st convex portions 511, and the weight of the feces increases. In the top sheet having fibers, the weight of feces increases, and moisture contained in the feces is likely to permeate into the absorbent body through the gaps between the fibers. Therefore, the moisture in the feces is rapidly transferred to the absorbent body, and the soft feces containing a large amount of moisture can be prevented from continuously adhering to the skin. In addition, the 2 nd region mainly absorbing urine can exhibit a smooth touch, and the 1 st region mainly absorbing feces can exhibit a thick touch such that absorption is reliably performed. In a disposable diaper, by providing 1 topsheet with portions having different tactile sensations, the wearer can perceive a function of softening the skin and a function of reliably absorbing feces.

The pitch of the 1 st convex portions is not constant, and the pitch between the 1 st convex portions disposed with the intermediate portion interposed therebetween is longer than the pitch between the 1 st convex portions not disposed with the intermediate portion interposed therebetween. The pitch of the longest 1 st convex part may be longer than the pitch of the longest 2 nd convex part.

The height of the sheet projection 511 is 0.3mm to 10.0mm, more preferably 0.4mm to 6.0mm, and still more preferably 0.5mm to 4.5 mm. The pitch of the sheet convex portions 51 is 0.3mm or more and 10.0mm or less, more preferably 0.5mm or more and 5.0mm or less, and still more preferably 1.0mm or more and 4.5mm or less. According to the sheet projection 51 having such a configuration, the discomfort of the appearance due to the excessive conspicuousness of the sheet projection 51 is suppressed, and the wearer can easily feel a sense of reassurance. Further, since the sheet convex portions 51 can be visually recognized, the wearer can easily feel a sense of security with respect to the absorption performance by the sheet convex portions 51.

The size of the opening is 1.0mm or more and 8.0mm or less, and more preferably 1.5mm or more and 5.0mm or less. Since the larger the opening, the better the permeability of feces, and the possibility that the feces after absorption will return from the perforated portion, it is preferable to set the interval and width of the sheet convex portions to a size close to the interval and width of the sheet convex portions (difference is 2mm or less). By providing openings of a size close to the spacing and width of the sheet protrusions, visual appearance and functional aspects can be taken into account.

The 2 nd recessed portion 522 is continuously disposed from the front end edge R1F of the 1 st region R1 to the front end edge of the topsheet 50. Since the 2 nd concave portion 522 is continuous, the body fluid can be smoothly spread from the front end edge R1F of the 1 st region R1 to the front end edge of the top sheet 50, and the urine can be rapidly transferred to the absorbent body 40 over a large area.

At the boundary of the 1 st region R1 and the 2 nd region R2, the 1 st recessed portion 521 and the 2 nd recessed portion 522 are connected in the front-rear direction L. Since the space in the 1 st recessed portion 521 communicates with the space in the 2 nd recessed portion 522, the excrement can be smoothly diffused between the 1 st region R1 and the 2 nd region R2. For example, even when the wearing position of the absorbent article is shifted and feces are discharged to the 2 nd region R2, the feces can be guided to the 1 st region R1 and stored and absorbed in the 1 st region R1.

In the 1 st region R1, the rising angle α (see fig. 4) of the 1 st projecting wall portion 591 is larger than the rising angle β (see fig. 5) of the 2 nd projecting wall portion 592. The rising angle α of the 1 st projecting wall portion 591 is larger than the rising angle β of the 2 nd projecting wall portion 592, and the 1 st projecting wall portion 591 is inclined relatively steeply. Therefore, the 1 st convex portion 511 can easily hold the excrement stored in the 1 st concave portion 521, and the temporarily stored excrement can be prevented from coming out of the 1 st concave portion 521.

The rising angle α of the 2 nd projecting wall portion 592 is smaller than the rising angle β of the 1 st projecting wall portion 591, and the 2 nd projecting wall portion 592 has a relatively gentle slope. The 2 nd region R2 is disposed at least in the crotch region 25. The crotch region 25 is in close contact with the skin of the wearer as compared with the rear waistline region 30. Since the convex wall portions of the 2 nd region R2 are gently inclined, even when the crotch region where the 2 nd region R2 is located is in close contact with the skin, the touch of the 2 nd convex portion 512 to the skin can be made soft.

The rising angle of the projecting wall portion 59 can be measured by the following method. The sheet to be measured is taken out from the absorbent article by cold spray or the like, and the convex portion of the measurement portion and the periphery thereof are cut parallel to the width direction. The cutting is performed in such a manner that the projections are not crushed as much as possible by a sharp cutter (e.g., a new blade of a cutter). The cut surface was magnified 20 times by a microscope in a state where the top sheet was placed on a horizontal plane so that wrinkles were not generated in the cut sheet, and the cross section was photographed. With respect to the photographed cross section, the rising angle of the skin-facing surface (surface other than the fluffed fibers) of the convex wall portion with respect to the horizontal plane was measured.

The fibers in the 1 st projecting wall portion 591 and the fibers in the 2 nd projecting wall portion 592 have more fibers oriented in the thickness direction of the top sheet than the fibers oriented in the front-rear direction and the width direction. According to such an absorbent article, the space on the non-skin-facing surface side of the sheet convex portion 51 is easily maintained, the touch of the sheet convex portion 51 to the skin is soft, and the wearer can obtain a soft touch. In addition, it is easy to guide the body fluid in the thickness direction T with the fibers oriented in the thickness direction T. Therefore, even when the height of the sheet convex portion 51 is set high, the body fluid in the convex wall portion 59 can be quickly guided to the absorbent body side.

The fiber orientation of the projection wall is oriented in the thickness direction, which means that the fibers are oriented in the range of +45 degrees to-45 degrees with respect to the thickness direction (the direction from the skin surface side of the sheet to the non-skin surface side) in a state where the sheet projections and sheet recesses are formed. The fiber orientation was measured using a digital microscope VHX-100 manufactured by kynshi, ltd, and the fiber orientation was measured by the following measurement method. (1) Placing the sample on an observation stage in such a manner that the surface of the convex wall portion can be observed; (2) focusing the lens on the most anterior fiber of the sample except for the fibers that irregularly fly out of the sample; (3) a 3D image of the sample was generated on a PC screen. Then, (4) converting the 3D image into a 2D image; (5) a plurality of parallel lines are drawn on the screen so as to equally divide the thickness direction of the convex wall portion in the measurement range. (6) In each cell subdivided by drawing parallel lines, the number of fibers oriented in each direction is measured, and then, (7) the fiber orientation can be measured and calculated by calculating the ratio of the number of fibers oriented in the thickness direction and the ratio of the number of fibers oriented in the direction orthogonal to the thickness direction for all the number of fibers within a set range.

The bending rigidity of the 1 st region R1 is higher than that of the 2 nd region R2. The bending stiffness was measured using KES FB-2 manufactured by Kyoto technologies. A test piece having a dimension of 50mm × 100mm is prepared, one end of the test piece in the longitudinal direction is held by one of the pair of chucks, and the other end of the test piece in the longitudinal direction is held by the other chuck. The bending rigidity of the test piece after bending was measured by a torque detector by rotating one chuck about the other chuck. 5 sets of test pieces were prepared, and the average of the measured values was set as the bending rigidity.

The front end edge R1F of the 1 st region R1 is located rearward of the center of the disposable diaper 10 in the front-rear direction L and rearward of the bend guide of the absorber 40. The bending guide portion is used to guide bending with a broken line along the width direction of the absorber 40 as a base point, and can exemplify a notch of the absorber 40, an embossed line extending along the width direction W, and an aggregate of embossings arranged along the width direction W, and is a portion having a difference in rigidity so that the absorber is bent with this portion as a base point. The bending guide portion of the present embodiment is formed by a pair of 1 st low basis weight portions 41. The bending guide portion is disposed in the range of the constricted region 84 in which the three-dimensional gathers are arranged in the front-rear direction. The range in which the contracted region 84 is arranged in the front-rear direction L is easily contracted in the front-rear direction L by contraction of the contracted region 84. When a force that contracts due to the contraction region acts, the absorbent article deforms with the bend guide portion as a base point. By deforming with the bend guide portion located on the front side of the 1 st region R1 as a base point, the contraction force of the contracted region 84 is absorbed, and the 1 st region R1 can be maintained in a flat state, and the function of introducing the feces can be continuously exerted.

The 1 st region R1 is disposed between the pair of 1 st fixing portions 81 in the width direction W. The outer edge of the 1 st region R1 is located inward in the width direction of the 1 st fixing section 81. The rigidity of the top sheet 50 between the first fixing portions 81 in the rear waistline region 30 is increased, and the height of the rising portions 83 is easily secured. Thus, side leakage of feces in the rear waistline region 30 can be prevented. Further, since the rising portions 83 are easy to rise, the top sheet 50 is difficult to be covered with the three-dimensional gathers 80, and the discharged feces are easily guided into the 1 st recessed portion 521.

The rear end edge R1R of the 1 st region R1 is located more rearward than the rear end edge of the contracted region 84. The 1 st region R1 is disposed so as to straddle the rear end edge of the contracted region 84 in the front-rear direction L. The rigidity near the rear end edge of the contracted region serving as the origin of the three-dimensional gather is increased. Since the rigidity of the standing base points of the three-dimensional gathers is high, the height of the three-dimensional gathers is easily ensured. More specifically, the rising portion 83 is closer to the 2 nd fixing portion 82 side than to the rising base point, and therefore, it is difficult to secure a rising height as compared with the center of the rising portion 83 in the front-rear direction. Further, since the region on the rear side of the contracted region 84 is not contracted by the side elastic member 71, it is difficult to secure the rising height of the rising portion 83. The 1 st region R1 is disposed on the rear side of the contracted region 84, and the rigidity of the topsheet 50 on the 2 nd fixing portion 82 side in the rear waistline region 30 is increased. Since the rigidity of the top sheet 50 is increased, the rising portion 83 is easily raised, and the height of the rising portion 83 is easily secured. Thus, side leakage of feces in the rear waistline region can be prevented. Further, by securing the height of the three-dimensional gathers, the top sheet can be prevented from being covered with the three-dimensional gathers, and the function of guiding the discharged feces into the 1 st recess 521 can be continuously exerted.

The rear end edge R1R of the 1 st region R1 is located on the front side of the waist holding portion and is spaced apart from the waist holding portion. The waist holding portion is a region between the pair of fastening portions 91. The waist holding portion is a region that fits the body in a worn state in which the fastening portion 91 is fastened to the front waist region 20. Since the region between the pair of fastening parts 91 is separated from the 1 st region R1, the feces contained in the 1 st recess 521 can be easily separated from the skin of the wearer.

The rear end edge R1R of the 1 st region R1 is located on the front side of the waist portion stretching portion 85 and is separated from the region where the waist portion stretching portion 85 is disposed. The region where the waist stretch unit 85 is disposed is a region that fits the body when worn. Since the 1 st region R1 is separated from the region where the waist stretch unit 85 is disposed, the feces contained in the 1 st recess 521 can be easily separated from the skin of the wearer.

(3) Method for manufacturing top sheet

Next, an example of a method for producing a nonwoven fabric constituting the top sheet will be described. In the production of the nonwoven fabric constituting the top sheet, the sheet convex portions and the sheet concave portions can be formed by shaping processing of stretching the nonwoven fabric. In the shaping process, the 1 st shaping process and the 2 nd shaping process can be performed. In the first forming process, the 2 nd convex portion 512, the 2 nd concave portion 522, the 2 nd bottom portion 532, and the 2 nd opening 542 are formed in the region corresponding to the entire region of the top sheet 50 in the width direction.

The 2 nd shaping is performed after the 1 st shaping. In the 2 nd forming process, the 1 st convex portion 511 is formed in the region corresponding to the 1 st region R1, and no processing is performed in the other regions. Specifically, in the region corresponding to the 1 st region, the 1 st convex portion 511 is formed by further extending a part of the 2 nd convex portion 512. Of the 2 nd convex portions 512 formed by the 1 st shaping process, the 2 nd convex portion 512 not subjected to the 2 nd shaping process constitutes the intermediate portion 58. Of the 2 nd bottom 532 and the 2 nd opening 542 formed by the 1 st forming process, the 2 nd bottom 532 and the 2 nd opening 542 corresponding to the 1 st region constitute a 1 st bottom 531 and a 1 st opening 541. That is, the 2 nd bottom 532 and the 2 nd opening 542 have the same structure as the 1 st bottom 531 and the 1 st opening 541.

In addition, a weld may be formed at the edge of the opening during the shaping process. The welded portion is a portion where fibers constituting the top sheet are welded. Since the welded portion is formed at the edge of the opening, the strength of the opening is improved, and the shape of the opening is easily maintained. Thus, the introduction of excrement can be maintained.

(4) Other embodiments

Next, an absorbent article according to a modification will be described. In the following description of the modified examples, the same reference numerals are used for the same components as those of the above-described embodiment, and the description thereof is omitted. Fig. 8 is a schematic view showing the top sheet 50 and the absorbent body 400 of the absorbent article of modification 1. The absorber 400 of the modification includes: an absorbing convex portion 401 protruding toward the skin-facing surface side T1; and absorption concave portions 402 provided between the absorption convex portions 401. The absorption concave portion 402 may be recessed with respect to the absorption convex portion 401. The weight per unit area of the absorbent material of the absorption concave portion 402 may be lower than that of the absorbent material of the absorption convex portion 401, or may be zero.

The 1 st opening 541 is disposed in a region overlapping the absorption convex portion 401 and in a region overlapping the absorption concave portion 402. Since the absorption convex portion 401 overlaps the 1 st opening 541, the distance between the 1 st opening 541 and the absorber 40 is short, and the body fluid introduced through the 1 st opening 541 can be quickly absorbed by the absorber 40. Further, since the absorption recess 402 and the 1 st opening 541 overlap, a space for accommodating feces can be formed on the non-skin surface side T2 of the 1 st opening 541, and the excrement introduced through the 1 st opening 541 can be introduced into the space. The 1 st opening 541 may be disposed in a region not overlapping the absorption convex portion 401, or may be disposed in a region not overlapping the absorption concave portion 402. The 2 nd opening 542 may be also disposed in a region overlapping the absorption convex portion 401 and the absorption concave portion 402.

Fig. 9 is a cross-sectional view of a top sheet 500 in the absorbent article of modification 2. The top sheet 500 of modification 2 has: a groove wall portion 55 extending from the bottom portion 53 to the non-skin-facing surface side T2; and a groove bottom 56 located closer to the non-skin-facing surface side T2 than the groove wall 55 and extending in the planar direction. The opening 54 is formed in the groove wall portion 55. Since the opening 54 is formed in the groove wall portion 55, a space is easily formed between the absorber 40 and the opening 54. The excrement having passed through the top sheet 50 can be temporarily held by the space between the opening 54 and the absorber 40, and the introducing property can be improved.

Fig. 10 is a cross-sectional view of a top sheet 501 in the absorbent article of modification 3. The top sheet 501 of modification 3 has the 1 st convex portion 511, the intermediate portion 58, and the 1 st concave portion 521 extending in the front-rear direction. A cut-off portion 57 is provided between the 1 st convex portions 511 in the width direction W. The cutoff portion 57 is configured to cut off a space extending in the front-rear direction of the 1 st concave portion 521. The top of the cut portion 57 is located closer to the non-skin-facing surface side T2 than the top of the 1 st convex portion 511, and is located closer to the skin-facing surface side T1 than the top of the intermediate portion 58. More specifically, the region on the skin-facing surface side T1 (the region on the skin-facing surface side T1 with respect to the cut-off portion 57) of the space extending in the front-rear direction L of the 1 st concave portion 521 is not cut off in the front-rear direction L, and is continuous in the front-rear direction L. On the other hand, the region of the non-skin-facing surface side T2 of the space extending in the front-rear direction L of the 1 st recessed portion 521 (the region where the dividing portion 57 is disposed) is divided in the front-rear direction L and is discontinuous in the front-rear direction L. The cut-off portions 57 are provided at intervals in the front-rear direction L. Thus, at least a portion of the 1 st recess 521 is discontinuous in the front-rear direction L. When the feces are discharged to the 1 st region R1, the feces are contained in the 1 st concave portion 521 between the 1 st convex portions 511. The excrement contained in the 1 st recess 521 can be suppressed from spreading in the front-rear direction L by the discontinuous portion in the front-rear direction L of the 1 st recess 521. Further, since the top of the 1 st convex portion 511 is positioned closer to the skin-facing surface side T1 than the top of the cutoff portion 57, the excrement in the 1 st concave portion 521 is likely to spread in the front-rear direction L and is less likely to spread in the width direction W. Thus, side leakage of feces can be prevented.

In the present embodiment, the term "extend in the front-rear direction" may be a structure having a certain range at least in the front-rear direction, and includes a structure extending in the width direction while being inclined in the front-rear direction at an angle of less than 45 degrees with respect to the front-rear direction. The term "extend in the width direction" may be a structure having a certain range at least in the width direction, and includes a structure extending in the front-rear direction while being inclined in the width direction so that the angle with respect to the width direction is less than 45 degrees.

As described above, the contents of the present invention are disclosed by the embodiments of the present invention, and it should not be understood that the discussion and the drawings constituting a part of the disclosure thereof are for limiting the present invention. Various alternative embodiments, examples, and techniques of use will be apparent to those skilled in the art in light of this disclosure. Accordingly, the scope of the present invention is to be determined solely by the specific features of the claims that are fairly set forth herein above.

The entire contents of Japanese patent application No. 2016-.

Industrial applicability

An absorbent article which allows a wearer to recognize a region from which feces are discharged from other regions and which provides a feeling of comfort during use.

Description of the reference numerals

10. A disposable diaper; 20. a front waistline region; 25. a crotch region; 30. a rear waist region; 40. 400, an absorber; 401. an absorbing projection; 402. an absorbing recess; 45. an auxiliary sheet; 50. 500, 501, a topsheet; 51. a sheet convex portion; 511. the 1 st convex part; 512. a 2 nd convex part; 52. a sheet recess; 521. 1 st recess; 522. a 2 nd recess; 53. a bottom; 54. an opening; 541. 1 st opening; 542. a 2 nd opening; 55. a groove wall portion; 56. the bottom of the tank; 57. a cut-off portion; 58. an intermediate portion; 59. a convex wall portion; 80. three-dimensional pleating; 84. a constricted region; l, the front-back direction; r1, region 1; r2, region 2; t1, skin-facing surface side; t2, non-skin-facing surface side; w, width direction.

Claims

1. An absorbent article comprising:

in the absorbent article, it is preferable that,

the opening is at least arranged in the No. 1 area,

the 1 st region is disposed so as to straddle a rear end edge of the contracted region in the front-rear direction,

the top of the intermediate portion is located on the non-skin-facing surface side of the top of the sheet convex portion in the 1 st region,

the sheet protrusions in the 1 st region are arranged in a staggered pattern.

2. The absorbent article of claim 1,

3. The absorbent article according to claim 1 or 2, wherein,

4. The absorbent article according to claim 1 or 2, wherein,

5. The absorbent article according to claim 1 or 2, wherein,

6. The absorbent article according to claim 1 or 2, wherein,

7. The absorbent article according to claim 1 or 2, wherein,

8. The absorbent article according to claim 1 or 2, wherein,

9. The absorbent article of claim 8,

the topsheet is provided with fibers that,

a space is formed between the sheet convex portion and the absorber,

the fibers in the convex wall portion have more fibers oriented in the thickness direction of the top sheet than the fibers oriented in the front-back direction and the width direction.

10. The absorbent article according to claim 1 or 2, wherein,

11. The absorbent article according to claim 1 or 2, wherein,

the opening is provided in the groove wall portion.

12. The absorbent article according to claim 1 or 2, wherein,

13. The absorbent article according to claim 1 or 2, wherein,

the height of the sheet convex part is more than 0.3mm and less than 10.0mm,

the pitch of the sheet convex part is more than 0.3mm and less than 10.0 mm.

14. The absorbent article according to claim 1 or 2, wherein,

the auxiliary sheet and the top sheet are formed of a nonwoven fabric,

15. The absorbent article according to claim 1 or 2, wherein,