KR102537750B1 - absorbent article - Google Patents

Abstract

Provided is an absorbent article capable of easily recognizing the entrainability of a region where feces are discharged and providing a sense of security during use. The absorbent article includes an absorbent body 40 and a top sheet 50 that is located on the side of the absorbent body facing the skin and is in contact with the wearer. The top sheet has a sheet convex portion 51 protruding toward the skin facing side and an opening 54 formed between the sheet convex portion. The top sheet has a first region R1 disposed in at least the rear waist region and a second region R2 disposed in at least the crotch region. The shape of the seat convex portion in the first area is different from the shape of the sheet convex portion in the second area. The opening is formed in at least the first region.

Description

absorbent article

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

Conventionally, among absorbent articles for absorbing wearer's urine and feces, there has been provided an absorbent article in which an opening (a concave portion for coating liquid) is formed in a top sheet for introducing excretion (see, for example, Patent Document 1). . The topsheet of Patent Literature 1 is formed with a plurality of convex portions protruding toward the skin facing surface, and openings disposed between the convex portions and penetrating in the thickness direction of the topsheet.

Patent Document 1: Japanese Unexamined Patent Publication No. 2009-89965

The convex portions and openings of the topsheet of Patent Literature 1 are regularly arranged in the same arrangement throughout the topsheet at regular intervals in the longitudinal and lateral directions. Therefore, a wearing assistant such as a mother recognizes the convex portion and the opening as a pattern, and may not be able to recognize the existence of the opening for drawing in the excrement. There have been cases in which the wearing assistant could not grasp the entrainability of bodily fluids on the top sheet and could not safely use the absorbent article. As a result of various investigations by the applicant, it has been found that a wearing assistant can easily obtain a sense of security during use by being able to grasp the retractability of the region from which stool is discharged.

Accordingly, an object of the present invention is to provide an absorbent article that enables a wearing assistant to easily recognize the retractability of a region from which feces are discharged, thereby obtaining a sense of security during use.

An absorbent article (disposable diaper 10) according to the present disclosure includes a front waist area (front waist area 20), a rear waist area (rear waist area 30), and the front waist area A crotch region (crotch region 25) located between the rear waist regions, a front-back direction from the front waist region to the rear waist region (front-rear direction L) and a width orthogonal to the front-back direction An absorber (absorber 40) extending in the direction (width direction (W)) and across the crotch region in at least one of the front waist region and the rear waist region, and on the skin facing surface side of the absorber and a top sheet (top sheet 50) in contact with the wearer, wherein the top sheet has a sheet convex portion protruding toward the skin facing surface side (sheet convex portion 51) and an opening formed between the sheet convex portion. (opening 54). The top sheet has a first region (first region R1) disposed in at least the rear waist region and a second region (second region R2) disposed in at least the crotch region, and It is the gist that the shape of the sheet convex portion in one area is different from the shape of the sheet convex portion in the second area, and that the opening is formed at least in the first area.

1 is an exploded plan view of a disposable diaper according to this embodiment.
FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1 .
3 is an enlarged plan view of a part of the top sheet of the disposable diaper shown in FIG. 1;
4 is a cross-sectional view taken along line BB shown in FIG. 3;
FIG. 5 is a cross-sectional view taken along line CC shown in FIG. 3 .
Fig. 6 is a partially broken perspective view schematically showing a first region of the top sheet.
Fig. 7 is a partially broken perspective view schematically showing a second region of the top sheet.
Fig. 8 is a perspective view of a top sheet and an absorber according to Modification Example 1;
Fig. 9 is a cross-sectional view of a top sheet according to Modification Example 2;
Fig. 10 is a perspective view of a top sheet according to Modification Example 3;

From the description of this specification and accompanying drawings, at least the following matters become clear.

a front waist region, a rear waist region, and a crotch region positioned between the front waist region and the rear waist region;

a front-back direction extending from the front waist area to the rear waist area and a width direction orthogonal to the front-and-back direction;

an absorbent body extending across the crotch region to at least one of the front waist region and the rear waist region;

a top sheet positioned closer to the skin facing surface than the absorbent body and in contact with the wearer;

The top sheet is an absorbent article having openings formed between sheet convex portions protruding toward the skin facing side,

the top sheet has a first region disposed in at least the rear waist region and a second region disposed in at least the crotch region;

The shape of the sheet convex portion in the first region and the shape of the sheet convex portion in the second region are different,

The absorbent article according to claim 1 , wherein the opening is formed in at least the first region.

According to this absorbent article, the first region is disposed at least in the rear waist region and includes a region from which feces are discharged. The second region is disposed at least in the crotch region and includes a region through which urine is discharged. The wearing assistant can easily recognize the first area because the shape of the seat convex portion in the first area and the sheet convex portion in the second area are different. Further, since the shape of the seat convex portion in the first area and the shape of the sheet convex portion in the second area are different for the attachment assistant, the performance of the top sheet disposed in the crotch region and the performance of the top sheet disposed in the rear waist region The difference can be grasped, and a sense of security that urine and feces are properly absorbed can be obtained.

When the stool is discharged onto the first region, the stool is accommodated in the space between the sheet convex portions and moves to the side of the non-skin facing surface through the opening between the sheet convex portions. Further, since the edges are sandwiched by the wall of the seat convex portions, once the edges accommodated between the sheet convex portions come into contact with the skin, it is possible to prevent the edges from coming out from between the sheet convex portions and reattaching to the wearer. .

As such an absorbent article,

a pair of three-dimensional gathers disposed on both outer sides of the absorbent article in the width direction from the center in the width direction;

Each of the three-dimensional gathers has a contraction area that contracts in the front-back direction by an elastic member,

The bending rigidity of the first region is higher than that of the second region,

Preferably, the first region is disposed across the rear edge of the constricted region in the front-back direction.

Since the first region spans the trailing edge of the constriction region in the front-back direction, the rigidity in the vicinity of the trailing edge of the constriction region serving as the starting point of the three-dimensional gather is increased. By increasing the rigidity of the starting point of the three-dimensional gather, it becomes easy to secure the height of the three-dimensional gather. Therefore, side leakage in the rear waist region can be prevented. In addition, by ensuring the height of the three-dimensional gathers, the top sheet is prevented from being covered by the three-dimensional gathers, and the function of guiding the discharged sides between the convex portions of the sheet in the first region can be continued.

As such an absorbent article,

the absorbent body has a bending inducing portion along the width direction and inducing bending of the absorbent article;

It is preferable that the bending guide portion is formed forward of the first region in a range in which the constriction region is disposed in the front-back direction.

The range in which the constriction area is arranged in the front-back direction is contracted in the front-back direction by contraction of the constriction area. When a contraction force is applied by the contraction area, the absorbent article is deformed starting from the bending guide part. By deforming the bending guide part located forward of the first region as a starting point, the contraction force of the constricted region is absorbed, the first region is maintained in a flat state, and the side drawing function can be continued.

As such an absorbent article,

Preferably, a height of the sheet convex portion in the first region is higher than a height of the sheet convex portion in the second region.

Since the height of the seat convex portion in the first area is higher than the height of the seat convex portion in the second area, the wall formed by the sheet convex portion sandwiching the sides can be formed relatively high. Since the wall of the sheet convex portion sandwiching the edges is high, the edges once accommodated between the sheet convex portions are sandwiched by the wall, making it easy to hold the edges. As a result, when the wearer's skin touches the surface of the accommodated stool, the stool is continuously held, and it is possible to prevent the stool from coming out and reattaching to the wearer.

In addition, since the height of the sheet convex portion in the first area is relatively high, the gap between the skin and the absorber in the first area becomes large. Air permeability is increased, the air inside the absorbent article is easily leaked to the outside, and soreness can be suppressed. In addition, before the seat is accommodated between the seat convex portions of the first region, the top sheet is in a state in which body pressure is applied to the first region and the sheet convex portion is collapsed, and in a state in which body pressure is not applied to the first region and the sheet convex portion is standing up. the thickness of varies. When the height of the sheet convex portion in the first region is relatively high, the amount of change in the thickness of the topsheet due to the presence or absence of body pressure increases, air flows more easily, and the effect of suppressing soreness is easily obtained. On the other hand, since the height of the seat convex portions in the second area is relatively low, the accommodating space between the sheet convex portions becomes small, and the edges accommodated in the first area can be suppressed from flowing into the second area. In addition, many sides can be accommodated between the sheet convex portions in the first region, the sides easily pass through the opening due to their own weight, and the amount of sides guided to the absorber through the opening can be increased.

As such an absorbent article,

It is preferable that the pitch of the sheet convex portions in the first region is longer than the pitch of the sheet convex portions in the second region.

Since the pitch of the sheet convexities in the first area is longer than the pitch of the sheet convexities in the second area, the space between the sheet convexities in the first area is widened, and the side accommodating space can be widened. Therefore, the edges discharged on the top sheet are accommodated between the sheet convex portions and are difficult to remain on the sheet convex portions. It is possible to suppress the feces from continuously contacting the wearer's skin and improve the wearing feeling. In addition, many sides can be held between the seat convex portions in the first region, and the self-weight of the sides increases. In a topsheet having fibers, when the weight of the stool increases, moisture contained in the stool becomes easier to pass through the absorbent body through the gaps between the fibers. Therefore, it is possible to quickly transfer the moisture in the feces to the absorbent, and suppress the continuous adhesion of soft feces containing a lot of water to the skin.

As such an absorbent article,

It is preferable that a welded portion to which the fibers constituting the top sheet are welded is formed at the edge of the opening.

Forming the welded portion at the edge of the opening increases the strength of the opening and makes it easy to maintain the shape of the opening. Therefore, the entrainability of excretion can be maintained.

As such an absorbent article,

the absorber has an absorption convex portion protruding toward the skin facing surface and an absorption concave portion formed between the absorption convex portion;

Preferably, the opening of the first region is disposed in a region overlapping 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 drawn through the opening can be quickly absorbed by the absorber. Therefore, it is possible to improve the entrainability of excrement.

As such an absorbent article,

the absorber has an absorption convex portion protruding toward the skin facing surface and an absorption concave portion formed between the absorption convex portion;

It is preferable that the opening of the first region is disposed in a region overlapping the absorption concave portion.

In the region where the absorption concave portion and the opening overlap, a space for accommodating feces can be formed on the side of the opening opposite to the skin, and excretion drawn through the opening can be drawn into the space. Therefore, it is possible to improve the entrainability of excrement.

As such an absorbent article,

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

It is preferable that an elevation angle of the convex wall portion of the first region is greater than an elevation angle of the convex wall portion of the second region.

The elevation angle of the convex wall portion of the first region is greater than the elevation angle of the convex wall portion of the second region, and the convex wall portion of the first region has a relatively steep slope. Therefore, it is possible to sandwich the excrement accommodated between the seat convex portions of the first region, hold the stool, and suppress excretion of excrement once received from between the seat convex portions. The elevation angle of the convex wall portion of the second region is smaller than the elevation angle of the convex wall portion of the first region, and the convex wall portion of the second region has a relatively gentle slope. The second region is disposed at least in the crotch region. The crotch area is in close contact with the wearer's skin compared to the rear waist area. Since the convex wall portion of the second region has a gentle slope, even when the second region is in close contact with the skin, contact of the sheet convex portion to the skin can be smoothed.

As such an absorbent article,

The top sheet has fibers,

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

It is preferable that the fibers in the convex wall portion have more fibers oriented along the thickness direction of the top sheet than fibers oriented along the longitudinal direction and the width direction.

The sheet convex portion is not easily crushed, the space of the sheet convex portion on the non-skin facing side is maintained, the contact with the skin becomes soft, and the wearer can obtain a soft touch. In addition, since the fibers formed by the convex wall portion contain many fibers oriented in the thickness direction, it is easy to induce body fluid in the thickness direction by the convex wall portion. Therefore, even when the height of the seat convex portion is configured high, the bodily fluid in the convex wall portion can be quickly guided to the absorber side.

As such an absorbent article,

Between the sheet convex portions of the first region, a bottom portion extending in the front-back direction and the width direction, and a middle portion protruding toward the skin facing surface from the bottom portion are formed;

It is preferable that the top of the intermediate portion is located on the side of the non-facing surface of the skin relative to the top of the sheet convex portion of the first region.

Since the intermediate portion is formed between the seat convex portions in the first region, the excretion in the space between the seat convex portions is difficult to diffuse in planar directions including the front-back and width directions. Therefore, it is possible to quickly guide the stool to the absorber side and suppress an increase in the area where the stool adheres to the skin.

As such an absorbent article,

a waist circumference holding portion extending along the width direction and holding the absorbent article on a wearer's body in the front waist region and the rear waist region;

It is preferable that the rear edge of the first region is positioned forward of the waist circumference holding portion.

The waist circumference holding portion is a region that holds the absorbent article on the body and is likely to adhere to the body. Since the first region and the waist circumference retaining portion are separated from each other, the edges accommodated between the seat convex portions in the first region can easily be kept away from the wearer's skin. In addition, in the configuration in which the seat convex portion of the first region is higher than the seat convex portion of the second region, the seat convex portion of the second region hardly adheres to the skin, and the uncomfortable feeling of the crotch region due to the seat convex portion of the second region is suppressed. can do.

As such an absorbent article,

Between the sheet convex portions, there is a groove wall portion extending toward the skin non-opposite side,

It is preferable that the said opening is formed in the said groove wall part.

Since the opening is formed in the groove wall portion extending toward the non-skin-facing surface side, a space is easily formed between the opening and the absorbent body arranged on the non-skin-facing surface side of the topsheet. By forming a space between the opening and the absorber, it is possible to temporarily retain the excretion that has passed through the top sheet and to improve the draw-in.

As such an absorbent article,

Preferably, the sheet convex portions of the first region are arranged in a zigzag pattern.

Since the spaces between the sheet convex portions are not continuous in the front-back direction or in the width direction, diffusion of edges in the planar direction can be suppressed.

As such an absorbent article,

The sheet convex portion of the first region is along the front-back direction;

It is preferable that a dividing portion is formed between the sheet convex portions of the first region to divide a space extending in the front-back direction between the sheet convex portions.

Since the dividing portion is formed to divide the space extending in the front-back direction, it is possible to suppress the spread of the edge accommodated in the seat concave portion in the front-back direction.

As such an absorbent article,

The height of the sheet convex portion is 0.3 mm or more and 10.0 mm or less,

It is preferable that the pitch of the said sheet|seat convex part is 0.3 mm or more and 10.0 mm or less.

According to the seat convex portion configured in this way, the uncomfortable feeling of appearance due to the excessive conspicuousness of the seat convex portion is suppressed, and the wearing assistant can easily obtain a sense of security. In addition, since the sheet convex portion can be visually recognized, it is easy to obtain a sense of security regarding the absorption performance of the sheet convex portion.

As such an absorbent article,

The outer edge of the top sheet is located on the inner side in the width direction of the outer edge of the absorber,

An auxiliary sheet positioned on the side of the skin facing surface of the absorber is provided outside the outer edge of the absorber in the width direction,

The auxiliary sheet and the top sheet are made of nonwoven fabric,

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

Since the distance between the fibers of the auxiliary sheet is relatively long, it is easy to entrain body fluids by the auxiliary sheet. Since the auxiliary sheet having higher entrainability is disposed outside the outer edge of the topsheet in the width direction, the excrement spreading outward in the width direction beyond the topsheet can be drawn into the absorber by the auxiliary sheet, and the excrement leakage can be further suppressed.

As such an absorbent article,

a pair of three-dimensional gathers disposed on both outer sides of the absorbent article in the width direction from the center in the width direction;

In the stretched state of the absorbent article, it is preferable that the outer edge of the top sheet is positioned outside the inner edge of the three-dimensional gather in the width direction.

In the stretched state of the absorbent article, since the outer edge of the topsheet is located outside the inner edge of the three-dimensional gather in the width direction, the entire topsheet between the inner edges of the three-dimensional gather is in the state before use of the absorbent article. is placed By visually recognizing the sheet convex portions and openings of the topsheet, the wearing assistant obtains a sense of security regarding the absorbent performance, feels the topsheet placement area wide, and can obtain a greater sense of security.

===About the disposable diaper according to the present embodiment===

Next, an embodiment of the disposable diaper 10 as an absorbent article according to the present invention will be described with reference to the drawings. On the other hand, the absorbent article according to the present invention is not limited to a disposable diaper, but includes an absorbent pad attached to underwear or a diaper. In addition, in description of the following drawings, the same or similar code|symbol is attached|subjected to the same or similar part. However, it should be noted that the drawings are schematic and the ratio of each dimension is different from the actual one. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Further, even between the drawings, parts having different dimensional relationships or ratios may be included.

(1) Overall schematic configuration of disposable diapers

1 is an exploded plan view of a disposable diaper 10 according to this embodiment. The developed plan view shown in Fig. 1 is a stretched state in which the elastic parts such as the three-dimensional gathers and the waist elastic part are stretched to a state in which wrinkles are not formed on the top sheet 50, side sheet 70, etc. constituting the disposable diaper. is a drawing of FIG. 2 is a cross-sectional view along line A-A shown in FIG. 1 .

A disposable diaper (10) has a front waist region (20), a crotch region (25), and a rear waist region (30). The front waist region 20 is a portion in contact with the wearer's front waist portion (belly portion). Further, the rear waist region 30 is a portion in contact with the wearer's rear waist portion (belly portion). The crotch region 25 is located between the front waist region 20 and the rear waist region 30 . On the other hand, in this embodiment, the direction from the front waist region 20 to the rear waist region 30 is called the front-back direction L, and the direction orthogonal to the front-back direction L is called the width direction W. The direction extending to the wearer's skin facing surface side (T1) and the skin non-facing surface side (T2) is called the thickness direction (T).

A disposable diaper (10) has an absorber (40). The absorber 40 extends across the crotch region 25 to at least either one of the front waist region 20 and the rear waist region 30 . The absorbent body 40 of this embodiment is disposed across the front waist region 20, the crotch region 25, and the rear waist region 30. The absorber 40 has an absorbent core 40a and a core wrap 40b.

In the crotch region 25 of the absorbent body 40, a first low unit weight portion 41 extending inward in the width direction W from the outer edge (outer end in the width direction) of the absorbent core 40 a is formed. has been The first low unit weight portions 41 are disposed on both outer edges of the absorbent core 40a, respectively, and are disposed at intervals in the front-back direction L. In the rear waist region 30 of the absorbent core 40a, a second low unit weight portion 42 extending forward from the rear edge of the absorbent core 40a is formed. The length of the width direction of the 2nd low unit weight part 42 is formed short as it goes to the front side. The first low unit weight portion 41 and the second low unit weight portion 42 are portions where the basis weight of the absorbent material is lower than that of the surrounding absorbent core. The 1st low unit weight part 41 and the 2nd low unit weight part 42 of this embodiment are notches. On the other hand, the 1st low unit weight part 41 and the 2nd low unit weight part 42 do not need to be formed.

The skin facing surface side T1 of the absorber 40 is provided with a liquid permeable top sheet 50 . The top sheet 50 constitutes the skin contact surface of the disposable diaper 10 and comes into contact with the wearer. The top sheet 50 is disposed over the front waist region 20, the crotch region 25, and the rear waist region 30. The topsheet 50 has fibers, and specifically, can be made of a nonwoven fabric. The outer edge of the top sheet 50 is located on the inner side in the width direction of the outer edge of the absorber 40 . The top sheet 50 will be described in detail later.

An auxiliary sheet 45 is provided between the top sheet 50 and the absorber 40 (see Fig. 2). The outer edge of the auxiliary sheet 45 is located outside the outer edge of the top sheet 50 in the width direction W. 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 made of nonwoven fabric. The distance between the fibers of the auxiliary sheet 45 is longer than the distance between the fibers of the top sheet 50 . Since the distance between the fibers of the auxiliary sheet is relatively long, it is easy to entrain body fluids by the auxiliary sheet. Since the auxiliary sheet having higher retractability is disposed outside the outer edge of the topsheet in the width direction, the side spreading outward in the width direction beyond the topsheet can be drawn in to the absorber side by the auxiliary sheet, Leakage can be suppressed. On the other hand, the auxiliary seat need not be provided. In the form without an auxiliary sheet, the top sheet is provided so as to cover the outer edge of the absorber.

The distance between fibers can be measured using a mercury porosimeter (manufactured by Shimadzu Corporation) or the like in accordance with the mercury porosimetry method (JIS R 1655). This mercury porosimetry method measures the pressure applied to mercury when mercury is injected between the constituent fibers of the fabric structure (top sheet and auxiliary sheet) as the measuring object, and the volume of the mercury that has been intruded into the space between the constituent fibers of the fabric structure. By measuring, information on the structure of the fabric structure can be obtained.

Specifically, the distance between fibers of the fabric structure can be measured according to the following procedure using a mercury porosimeter.

1) A measurement sample is prepared by cutting a fiber structure as a measurement object into a size of 24 mm × 15 mm. Three samples for this measurement are produced.

2) Three samples for measurement are set in the sample cell of a mercury porosimeter (manufactured by Shimadzu Seisakusho Co., Ltd.) so that they do not overlap each other, and then, while gradually changing the pressure applied to the mercury, the constituent fibers of the fabric structure The volume of mercury pushed into the intervening space (ie, pore volume) is measured. On the other hand, the measurement is performed in an environment of 22°C and 65% RH.

3) Calculate the pore diameter D (μm) of the pore (ie, the distance between fibers (μm) of the fibrous structure) according to the following formula (1), and calculate the relationship between the pore diameter D and the pore volume, It is obtained as a distribution curve (differential/integral curve) of diameter D. On the other hand, as for various measurement conditions in the following formula (1), the surface tension of mercury is 0.483 N/m, the contact angle is 130°, and the mercury pressure is 0 to 414 MPa (absolute pressure).

Equation (1) D=-4γcosθ/P

(In the formula, D is the hole diameter (distance between fibers), γ is the surface tension of mercury, θ is the contact angle, and P is the pressure.)

On the non-skin facing surface side T2 of the absorber 40, a liquid impermeable back sheet 60a is provided. On the non-skin facing side of the back sheet, an exterior sheet 60 is provided.

A pair of three-dimensional gathers 80 are disposed on both outer sides of the disposable diaper 10 in the width direction from the center in the width direction. The three-dimensional gathers 80 are stand-up gathers capable of standing up on the wearer side. The three-dimensional gathers 80 are constituted by a side sheet 70 and a side elastic member 71 as an elastic member.

On the side of the inner edge of the side seat 70, a side elastic member 71 that expands and contracts in the front-back direction L is disposed. The pair of three-dimensional gathers 80 are substantially linearly symmetrical with the center of the disposable diaper in the width direction serving as an axis of symmetry. Each three-dimensional gather 80 has a side elastic member 71 that expands and contracts in the front-back direction, a standing portion 83 that can stand up toward the wearer, and is located outside the standing portion 83 in the width direction, and further includes a standing portion ( The first fixing part 81, which is the starting point of the rising (rising) of the 83), and the first fixing part 81, which is located outside the standing part 83 in the front-back direction L, and also serves as the starting point of the rising of the standing part 83. It has 2 fixing parts (82). The front edge of the standing portion 83 coincides with the rear edge of the second fixing portion 82 disposed in the front waist region 20, and the rear edge of the standing portion 83 is aligned with the rear waist region 30. ) coincides with the front edge of the first fixing part 81 disposed at.

The side sheet 70 covers the outer edge of the top sheet 50 and the outer edge of the auxiliary sheet 45 . In the stretched state of the absorbent article, the inner edge of the three-dimensional gather (the inner edge of the side sheet 70) is located on the inner side of the outer edge of the top sheet in the width direction. In the stretched state of the absorbent article, since the outer edge of the topsheet is located outside the inner edge of the three-dimensional gather in the width direction, the entire topsheet between the inner edges of the three-dimensional gather is in the state before use of the absorbent article. is placed By visually recognizing the top sheet, the wearing assistant obtains a sense of security regarding the absorbent performance, feels the top sheet arrangement area wide, and can obtain a greater sense of security.

The side sheet 70 is joined on the top sheet 50 or the auxiliary sheet 45 at the first fixing part 81 and the second fixing part 82 . Since the standing part 83 is formed between the second fixing parts 82 in the front-back direction L and is not joined to the top sheet 50, it can rise from the top sheet 50 or the like. . The standing portion 83 stands up toward the wearer in a state where the side elastic members are contracted. The standing portion 83 stands up toward the wearer in a state where the disposable diaper is worn. The standing portion 83 has a contraction region 84 in which the side elastic member 71 is arranged to be contractible. The contraction region 84 is a region where the side elastic member 71 is joined in an extended state when the disposable diaper is stretched. The contraction area 84 excludes the area where the side elastic member 71 is not disposed in the standing part 83 and the area where the side elastic member 71 in the non-extended state is joined, and also the side elastic member 71 is joined. This is a concept of excluding the area where the elastic member 71 is not bonded to the side seat 70. The three-dimensional gathers 80 form a wall that rises to the skin facing surface side T1 at the outer edge of the absorber 40 to prevent excretion from leaking laterally.

At the outer edge of the disposable diaper 10, a leg-circumferential opening 13 is formed around the leg of the wearer. The disposable diaper 10 is provided with a pair of leg extension portions 75 disposed inside the leg openings 13 in the width direction and capable of stretching in the front-back direction L. The leg expansion and contraction portions 75 are respectively disposed on the inner side in the width direction of the left and right leg openings 13 .

The fastening tapes 90 are a pair and extend outward from the side sheet 70 in the width direction W in the rear waist region 30 . The fastening tape 90 is attached to the side sheet 70 . The fastening tape 90 has a fixing portion 91 fixed to the target portion 95 of the front waist region 20 . The fixing part 91 is, for example, a part where a coupling hook is installed. The fastening tape 90 is fixed to the target portion 95 of the front waist region 20 to hold the disposable diaper 10 on the wearer's body. The region between the fixing portions 91 of the pair of fastening tapes is a region held on the body when worn, and constitutes a waist circumference holding portion.

The target portion 95 is provided on the surface of the outer garment sheet 60 in the front waist region 20 on the non-skin facing side T2 side. The target portion 95 is configured to engage the hook of the fastening tape 90, and functions as a loop of the hook and loop engaging system. On the other hand, the disposable diaper may be a pants-type diaper without the fastening tape 90 and the target portion 95. In the pants-type diaper, the region between the side joint portions joining the front waist region and the rear waist region constitutes the waist region holding portion.

The disposable diaper 10 has a waist elastic part 85 that can be stretched in the width direction. The waist elastic part 85 is disposed in the rear waist region 30 . The waist elastic part 85 is disposed between the pair of fastening tapes 90 in the width direction, and contracts between the fastening tapes 90 in the width direction. The waist elastic part 85 does not need to be formed.

(2) Configuration of the top sheet

Next, the configuration of the top sheet 50 will be described in detail. 3 is an enlarged plan view of a top sheet. The topsheet 50 has a sheet convex portion 51 protruding toward the skin facing surface side T1 and a sheet concave portion 52 formed between the sheet convex portions 51 . On the other hand, in FIGS. 1 and 2, the seat convex portion 51 and the seat concave portion 52 are omitted and illustrated. The sheet convex portion 51 protrudes to the skin-facing surface side T1 of the disposable diaper 10, and the sheet concave portion 52 is a space between the sheet convex portions 51. The sheet convex portion 51 has a conical shape and is tapered towards the end toward the skin facing surface side T1. The top of the seat convex portion 51 has a rounded shape. The sheet convex portions 51 are arranged at intervals in the front-back direction L and the width direction W, and are arranged in a zigzag shape in plan view. The zigzag pattern here is a state in which they are not arranged side by side in the front-back direction L and the width direction W, but shifted in at least one of the front-back 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 convex wall portion 59 extends from the top of the seat convex portion 51 to the bottom portion 53 .

The seat concave portion 52 is a space sandwiched by the seat convex portion 51 . More specifically, the seat concave portion 52 is a space surrounded by the convex wall portion 59 and the bottom portion 53 . The surface of the seat concave portion 52 on the non-skin facing side T2 is the bottom portion 53, and the skin facing surface of the seat concave portion 52 is a virtual plane connecting the tops of the convex wall portions 59 to each other. am. 4 and 5, the region of the seat concave portion 52 is shown with oblique lines.

The bottom part 53 extends in the front-back direction (L) and the width direction (W). An opening 54 is formed between the sheet convex portions 51 . The opening 54 passes 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 over the entire surface of the top sheet 50. On the other hand, the sheet convex portion 51, the sheet concave portion 52, the bottom portion 53, and the opening 54 may be formed only on a part of the top sheet 50.

The top sheet 50 has a first region R1 and a second region R2. In Fig. 1, the first region R1 and the second region R2 are indicated by different oblique lines. The first region R1 is disposed at least in the rear waist region 30 . Therefore, feces are mainly discharged on the first region R1. When the stool is discharged onto the first region R1, the stool is accommodated in the seat concave portion 52 between the seat convex portions 51. The second region R2 is on the front side of the first region R1 and is disposed at least in the crotch region 25 . Therefore, urine is mainly discharged on the second region R2. When urine is discharged onto the first region R1, the urine is guided to the absorber 40 while being diffused in the front-back direction L and the width direction W by the sheet concave portion 52. 2nd area|region R2 should just be arrange|positioned at least in front of 1st area|region R1, but 2nd area|region R2 of this embodiment is an area other than 1st area|region R1 of topsheet 50. It is disposed throughout, and the first region R1 is surrounded by the second region R2 in plan view.

4 and 6 are diagrams schematically showing the top sheet 50 in the first region R1. 5 and 7 are diagrams schematically showing the top sheet 50 in the second region R2. The sheet convex portion 51 includes a first convex portion 511 that is the sheet convex portion 51 of the first region R1 and a second convex portion that is the sheet convex portion 51 of the second region R2 ( 512). The seat concave portion 52 includes a first concave portion 521 that is the seat concave portion 52 of the first region R1 and a second concave portion that is the seat concave portion 52 of the second region R2 ( 522). The bottom portion 53 includes a first bottom portion 531 that is the bottom portion 53 of the first region R1 and a second bottom portion 532 that is the bottom portion 53 of the second region R2. have The opening 54 includes a first opening 541 that is the opening 54 of the first region R1 and a second opening 542 that is the opening 54 of the second region R2. The opening 54 should just be formed in at least 1st area|region R1.

The shape of the topsheet 50 in the first region R1 is different from the shape of the topsheet 50 in the second region R2. More specifically, at least the shape of the first convex portion 511 and the shape of the second convex portion 512 are different. The structure in which the shape of the seat convex portion 51 is different means the length of the seat convex portion 51 in the width direction, the length of the seat convex portion 51 in the longitudinal direction L, and the height (thickness) of the seat convex portion 51. direction length), the pitch of the seat convex portions 51, and at least a part of the plan view shape (circular, rectangular, etc.) of the seat convex portions 51 are different. In the top sheet 50 of this embodiment, the height 511H of the first convex portion 511 and the height 512H of the second convex portion 512 are different, and the pitch of the first convex portion 511 ( P1) and the pitch P2 of the second convex portion 512 are different. Since the shape of the first convex portion 511 and the shape of the second convex portion 512 are different, the wearing assistant can easily recognize the first region R1. In addition, since the shape of the first convex portion 511 and the shape of the second convex portion 512 are different, the attachment assistant improves the performance of the top sheet disposed in the crotch region and the top sheet disposed in the rear waist region. The difference in performance can be grasped, and a sense of security that urine and feces are properly absorbed can be obtained.

Moreover, the shape of the 1st concave part 521 and the shape of the 2nd concave part 522 may differ. The configuration in which the shape of the seat concave portion 52 is different means that the length of the seat concave portion 52 in the width direction W, the length of the seat concave portion 52 in the front-back direction L, and the seat concave portion 52 It is a structure in which the shape of the formed opening 54 and at least a part of the position of the opening 54 differ.

In the top sheet 50 of the first region R1, the first convex portion 511, the first concave portion 521, the middle portion 58, the first bottom portion 531, the first An opening 541 is formed. The intermediate portion 58 is formed between adjacent first convex portions 511 . The height of the intermediate portion 58 is lower than the height of the first convex portion 511 . The middle portion 58 protrudes more toward the skin facing surface side T1 than the first bottom portion 531 . The top of the intermediate portion 58 is located closer to the non-skin facing side T2 than the top of the first convex portion 511 . Around the middle portion 58, a first bottom portion 531 is disposed. In the cross section at the position where the intermediate portion 58 is formed (the cross section shown in FIG. 4 ), the top sheet 50 has a first convex portion 511, a first concave portion 521, and a first convex portion. In the order of (511), each part is formed adjacently, and in the first concave part 521, the first bottom part 531, the first opening 541, the first bottom part 531, and the middle part 58, the first bottom portion 531, the first opening 541, and the first bottom portion 531 are formed adjacent to each other in this order. On the other hand, the middle part 58 does not need to be formed, and the 1st convex part 511 may be formed instead of the middle part 58.

A second convex portion 512 and a second concave portion 522 are formed in the top sheet 50 in the second region R2. The middle part is not formed in the top sheet 50 of 2nd area|region R2. The second convex portions 512 are arranged in a zigzag pattern. In the cross section of the second region R2 (the cross section shown in FIG. 5 ), the top sheet 50 has second convex portions 512 , second concave portions 522 , and second convex portions 512 . In order, each part is formed adjacently, and in the second concave portion 522, in the order of the second bottom part 532, the second opening 542, and the second bottom part 532, each part is formed adjacent to it.

Since the top sheet 50 is formed with a plurality of sheet concave portions 52 and sheet convex portions 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 absorbent body 40, bodily fluid drawn in by the top sheet 50 can be drawn into the space, and excretion can be quickly absorbed by the absorbent body, and the top sheet It can prevent body fluid from remaining on the stomach.

In the top sheet 50 structured as described above, when the edge is discharged onto the first region R1, the edge is accommodated in the first concave portion 521 between the first convex portions 511. The edge is sandwiched by the first convex portion 511 and stays in the first concave portion 521 . As the side is accommodated in the first concave portion 521, the contact area between the wearer and the side is reduced. Since the edges are sandwiched by the wall by the first convex portions 511, once the edges accommodated between the first convex portions 511 touch the skin, the edges come out from between the first convex portions and are presented to the wearer. adhesion can be prevented. Therefore, it is possible to suppress an increase in the area where the stool is attached to the skin. Since the intermediate portion 58 is formed between the first convex portions 511, excretion in the space between the first convex portions 511 is difficult to spread in the front-back direction L and the width direction W. . Moreover, the 1st convex part 511 is arrange|positioned in a zigzag shape, and the 1st concave part 521 is divided in the front-back direction L and the width direction W. Therefore, the side accommodated in the first concave portion 521 is difficult to spread along the front-back direction L and the width direction W. Soft feces containing a lot of moisture migrate to the absorber 40 through the first opening 541 of the first concave portion 521 .

In the top sheet 50 configured as described above, when urine is discharged onto the second region R2, the urine passes through the second concave portion 522 between the second convex portions 512 in the front-back direction (L). ), and spreads in an oblique direction that is inclined with respect to the width direction W. Urine has high fluidity and moves to the absorber 40 through the second opening 542 formed in the second bottom portion 532 while spreading in a planar direction along the second bottom portion 532 . In this way, urine is diffused in the second region R2 to quickly transfer the urine to the absorber, and in the first region R1 while soft feces and body fluids are transferred to the absorber 40, solid feces By continuing to hold, it is possible to suppress adhesion of bodily fluids or soft feces to the wearer's skin and improve the wearing feeling. The first region R1 and the second region R2 of the top sheet can appropriately absorb urine and feces having different properties.

The height of the topsheet 50 in the first region R1 (the length from the first bottom portion 531 to the top of the first convex portion 511, and the height of the first convex portion 511 (511H) ) Corresponding to) (R1H) is the height of the top sheet 50 in the second region R2 (the length from the second bottom portion 532 to the top of the second convex portion 512, It is higher than (corresponding to the height 512H of the 2 convex part 512) (R2H). Since the height of the topsheet 50 in the first region R1 is relatively high, the wearer's skin and the absorber 40 can be separated in the first region R1, and the absorber 40 Absorbed bodily fluids are less likely to return to the skin side, making it easier to keep the wearer's skin dry.

The height of the first convex portion 511 (the length from the first bottom portion 531 to the top of the first convex portion 511) 511H is the height of the second convex portion 512 (the second bottom portion). The length from 532 to the top of the second convex portion 512) is higher than 512H. The sides discharged onto the first region R1 are accommodated in the first concave portion 521 between the first convex portions 511 . At this time, since the height 511H of the first convex portion 511 is higher than the height 512H of the second convex portion 512, the wall by the first convex portion 511 can be formed relatively high. Since the wall sandwiching the sides is high, the sides once accommodated in the first concave portion 521 are easily held by the first convex portion 511 . As a result, when the wearer's skin touches the surface of the side accommodated in the first concave portion 521, the side continues to be held in the first concave portion 521, and the side comes out from the first concave portion 521 and returns to the wearer. adhesion can be prevented.

In addition, since the height of the first convex portion 511 is relatively high, the gap between the skin and the absorber 40 increases in the first region R1. Air permeability is increased, air inside the diaper flows out to the outside of the diaper, and soreness can be suppressed. In addition, before the stool is accommodated between the first convex portions 511, a state in which body pressure is applied to the first region R1 and the first convex portion 511 is crushed, and a state in which body pressure is applied to the first region R1 The thickness of the top sheet 50 changes in a state in which the first convex portion 511 is standing up without losing weight. When the height of the first convex portion 511 is relatively high, the difference in thickness of the top sheet 50 due to the presence or absence of body pressure increases, air flows more easily, and the effect of suppressing sores is easily obtained. In addition, many sides can be accommodated between the first convex portions 511, the sides easily pass through the opening 54 due to their own weight, and the amount of sides guided to the absorber 40 through the opening 54 can be increased. can

On the other hand, since the height 512H of the second convex portion 512 is lower than the height 511H of the first convex portion 511, the tactile sensation in the second region R2 can be improved. The crotch region 25 is in contact with the excretory port of the wearer. The crotch region 25 adheres closely to the wearer's skin compared to the rear waist region 30 . Since the height 512H of the second convex portion 512 of the second region R2 that touches the crotch region 25 is suppressed, even when the crotch region where the second region R2 is located is in close contact with the skin. , Contact with the skin by the second convex portion 512 can be softened. The tactile feeling is improved, and the wearing feeling of the wearer is improved. From the viewpoint of improving such a wearing feeling, the area of the second region R2 may be larger than that of the first region R1. By forming the area of the second region R2 suitable for the tactile feeling wide, it is possible to further improve the wearing feeling. In addition, since the height of the second convex portion 512 is relatively low, the accommodating space of the second concave portion 522 is reduced, so that the side accommodated in the first region R1 does not flow to the second region R2. can

The pitch P1 of the 1st convex part 511 is longer than the pitch P2 of the 2nd convex part 512. The space between the first convex portions 511 is widened, so that the side accommodating space can be widened. Therefore, the side discharged on the top sheet 50 is accommodated between the 1st convex parts 511, and it becomes difficult to remain on the 1st convex part 511. It is possible to suppress the feces from continuously contacting the wearer's skin and improve the wearing feeling. In addition, many sides can be held between the first convex portions 511, and the weight of the sides increases. In a topsheet having fibers, when the weight of the stool increases, moisture contained in the stool becomes easier to pass through the absorbent body through the gaps between the fibers. Therefore, it is possible to quickly transfer the moisture in the feces to the absorbent, and suppress the continuous adhesion of soft feces containing a lot of water to the skin. In addition, the second region mainly absorbing urine can have a smooth touch, and the first region mainly absorbing feces can have a thick touch that ensures absorption. In the topsheet of one sheet of the disposable diaper, the wearer can perceive a function that is soft on the skin and a function that reliably absorbs feces by forming parts having different tactile sensations.

On the other hand, the pitch of the first convex portions is not constant, and the pitch between the first convex portions disposed across the middle portion is longer than the pitch between the first convex portions not disposed across the middle portion. The pitch of the longest 1st convex part should just be comprised longer than the pitch of the longest 2nd convex part.

The height of the sheet convex portion 511 is 0.3 mm or more and 10.0 mm or less, more preferably 0.4 mm or more and 6.0 mm or less, and still more preferably 0.5 mm or more and 4.5 mm or less. The pitch of the sheet convex portions 51 is 0.3 mm or more and 10.0 mm or less, more preferably 0.5 mm or more and 5.0 mm or less, and still more preferably 1.0 mm or more and 4.5 mm or less. According to the seat convex portion 51 configured in this way, the uncomfortable feeling of appearance due to the excessive conspicuousness of the seat convex portion 51 is suppressed, and the wearing assistant can easily obtain a sense of security. In addition, since the seat convex portion 51 can be visually recognized, it is easy for the wearing assistant to feel secure about the absorption performance of the seat convex portion 51.

The size of the opening is 1.0 mm or more and 8.0 mm or less, more preferably 1.5 mm or more and 5.0 mm or less. The larger the opening, the better the permeability of the stool, but there is also a possibility that the stool after absorption may return from the aperture. Therefore, depending on the spacing and width of the convex portion of the sheet, the size is close to the spacing and width of the convex portion of the sheet (with a difference of 2 mm or less). it is desirable By forming openings of a size close to the spacing and width of the sheet convex portions, it is possible to achieve both visual image and function.

The 2nd recessed part 522 is continuously arrange|positioned from the front edge R1F of 1st area|region R1 to the front edge of the topsheet 50. Since the second concave portion 522 is continuous, body fluid can be smoothly diffused from the front edge R1F of the first region R1 to the front edge of the top sheet 50, and urine can be quickly discharged over a large area. It can be transferred to the absorber 40.

At the boundary between the first region R1 and the second region R2, the first concave portion 521 and the second concave portion 522 are continuous in the front-back direction L. Since the space in the first concave portion 521 and the space in the second concave portion 522 communicate with each other, excretion can be smoothly diffused between the first region R1 and the second region R2. . For example, even when the absorbent article is not installed and the stool is discharged to the second region R2, the stool is guided to the first region R1 and the stool can be accommodated and absorbed by the first region R1. can

In the first region R1, the elevation angle α of the first convex wall portion 591 (see FIG. 4) is greater than the elevation angle β of the second convex wall portion 592 (see FIG. 5). The elevation angle α of the first convex wall portion 591 is greater than the elevation angle β of the second convex wall portion 592, and the first convex wall portion 591 has a relatively steep slope. Therefore, it is easy to hold the excretion accommodated in the 1st concave part 521 by the 1st convex part 511, and the excretion once accommodated can be suppressed from escaping from the 1st concave part 521.

The elevation angle α of the second convex wall portion 592 is smaller than the elevation angle β of the first convex wall portion 591, and the second convex wall portion 592 has a relatively gentle slope. 2nd area|region R2 is arrange|positioned in the crotch area|region 25 at least. The crotch region 25 adheres closely to the wearer's skin compared to the rear waist region 30 . Since the convex wall of the second region R2 has a gentle slope, even when the crotch region where the second region R2 is located is in close contact with the skin, the contact with the skin by the second region 512 is smooth. can do.

On the other hand, the angle of elevation of the convex wall portion 59 can be measured by the following method. A sheet to be measured is taken out of the absorbent article using a cold spray or the like, and the convex portion of the measurement location and its periphery are cut in parallel in the width direction. The cutting is performed with a sharp blade (for example, a razor blade of a cutter) so that the convex portion is not crushed as much as possible. In order not to wrinkle the cut sheet, the cut surface is magnified 20 times with a microscope and the cross section is photographed while the top sheet is placed on a horizontal surface. With respect to the photographed section, the angle of elevation of the skin-facing surface side surface of the convex wall portion (surface excluding fuzzy fibers) with respect to the horizontal plane is measured.

The fibers in the first convex wall portion 591 and the fibers in the second convex wall portion 592 have more fibers oriented along the thickness direction of the topsheet than fibers oriented along the front-back and width directions. . According to this absorbent article, it is easy to maintain the space of the sheet convex portion 51 on the non-skin facing side, the contact of the sheet convex portion 51 to the skin becomes soft, and the wearer can obtain a soft touch. In addition, the fibers oriented in the thickness direction (T) facilitate inducing body fluid in the thickness direction (T). Therefore, even when the height of the seat convex portion 51 is configured high, the bodily fluid in the convex wall portion 59 can be quickly guided to the absorber side.

On the other hand, the fact that the fiber orientation of the convex wall portion is oriented in the thickness direction means that, in the state where the sheet convex portion and the sheet concave portion are formed, the fibers are from +45 degrees to -45 degrees with respect to the thickness direction (direction from the skin surface side of the sheet to the non-skin surface side). It means that it is oriented within the range of 45 degrees. In addition, the measurement of fiber orientation was performed using Digital Microscope VHX-100 by Keyence Corporation, and was performed with the following measuring method. (1) set the sample on the observation table so that the surface of the convex wall can be observed, (2) adjust the focus of the lens to the frontmost fibers of the sample except for the fibers protruding forward irregularly, (3) sample Create a 3D image of the on the PC screen. Next, (4) the 3D image is converted into a 2D image, and (5) a plurality of parallel lines dividing the thickness direction of the convex wall portion equally in the measurement range are drawn on the screen. (6) In each subdivided cell by drawing parallel lines, the number of fibers oriented in each direction is measured, and (7) the number of fibers oriented in the thickness direction relative to the total number of fibers within the set range is It can be measured and calculated by calculating the ratio and the ratio of the number of fibers oriented in the direction orthogonal to the thickness direction.

The bending rigidity of the first region R1 is higher than that of the second region R2. Bending rigidity is measured using KES FB-2 by Gatotech Co., Ltd. A test piece having dimensions of 50 mm × 100 mm is prepared, one end of the test piece in the longitudinal direction is held on one side of a pair of chucks, and the other end in the longitudinal direction of the test piece is held on the other end of the chuck. One chuck rotates around the other chuck, and the bending rigidity of the test piece bent thereby is measured with a torque detector. Five sets of test pieces are prepared, and the average value of the measured values is taken as the bending stiffness.

The front edge R1F of the first region R1 is located behind the center of the disposable diaper 10 in the front-back direction L, and is located behind the bend guide portion of the absorbent body 40. The bending induction unit induces bending starting from the folding line along the width direction of the absorber 40, and the cutout of the absorber 40, the embossed line extending in the width direction (W), and the width direction (W) A collection of embossments arranged along can be exemplified, and it is a part in which a difference in stiffness is provided so that the absorber is bent from the above part as a starting point. The bending guidance part of this embodiment is comprised by the pair of 1st low unit weight part 41. The bending guide part is disposed within the range in which the contraction region 84 of the three-dimensional gather is disposed in the front-back direction. The range in which the constriction area 84 is disposed in the front-back direction L is likely to be contracted in the front-back direction L by contraction of the constriction area 84 . When a contraction force is applied by the contraction area, the absorbent article is deformed starting from the bending guide part. By deforming the bending induction part located forward of the first region R1 as a starting point, the contraction force of the contraction region 84 is absorbed, maintaining the first region R1 in a flat state, and the function of drawing in the sides. can continue to perform.

The first region R1 is disposed between the pair of first fixing parts 81 in the width direction W. The outer edge of the first region R1 is located on the inner side of the first fixing part 81 in the width direction. The rigidity of the top sheet 50 between the first fixing parts 81 in the rear waist region 30 is increased, and the height of the standing part 83 is easily secured. Therefore, side leakage of sides in the rear waist region 30 can be prevented. In addition, since the rising portion 83 becomes easy to rise, it becomes difficult to cover the top sheet 50 with the three-dimensional gather 80, and it becomes easy to guide the discharged sides into the first concave portion 521.

The rear edge R1R of the first region R1 is located behind the rear edge of the constriction region 84 . The first region R1 is disposed across the rear edge of the constriction region 84 in the front-back direction L. The rigidity in the vicinity of the rear edge of the constriction region serving as the starting point of the rise of the three-dimensional gather increases. By increasing the rigidity of the starting point of the three-dimensional gather, it becomes easy to secure the height of the three-dimensional gather. More specifically, since the second fixing part 82 side of the standing part 83 is close to the starting point of the rising, it is difficult to secure a rising height compared to the center of the standing part 83 in the front-back direction. In addition, since the region on the rear side of the contraction region 84 is not contracted by the side elastic member 71, it is difficult to secure the rising height of the standing portion 83. A first region R1 is disposed on the rear side of the constriction region 84, and the rigidity of the top sheet 50 on the side of the second fixing portion 82 in the rear waist region 30 is increased. By increasing the rigidity of the top sheet 50, the rising portion 83 becomes easier to rise, and the height of the rising portion 83 becomes easier to secure. Therefore, side leakage in the rear waist region can be prevented. In addition, by ensuring the height of the three-dimensional gather, the function of preventing the top sheet from being covered by the three-dimensional gather and guiding the discharged sides into the first concave portion 521 can be continued.

The rear edge R1R of the first region R1 is located on the front side of the waist holding portion and is separated from the waist holding portion. The waist circumference holding portion is a region between the pair of fixing portions 91 . The waist circumference retaining portion is a region in which the fixing portion 91 is fixed to the front waist region 20 and is in close contact with the body in an attached state. Since the area between the pair of fixing parts 91 and the first area R1 are spaced apart from each other, it is easy to realize a state in which the edges accommodated in the first concave portion 521 are separated from the wearer's skin.

The rear edge R1R of the first region R1 is located on the front side of the waist elastic portion 85 and is spaced apart from the region where the waist elastic portion 85 is disposed. The region where the waist elastic portion 85 is disposed is a region in close contact with the body in the worn state. Since the first region R1 and the region where the waist elastic portion 85 is disposed are separated from each other, it is easy to realize a state in which the side accommodated in the first concave portion 521 is separated from the wearer's skin.

(3) Manufacturing method of top sheet

Subsequently, an example of a method for manufacturing the nonwoven fabric constituting the top sheet will be described. In the production of the nonwoven fabric constituting the topsheet, sheet convex portions and sheet concave portions can be formed by shaping processing of stretching the nonwoven fabric. The shaping process may include a first shaping process and a second shaping process. The first shaping process is performed on the second convex portion 512, the second concave portion 522, the second bottom portion 532, and the second opening in the region corresponding to the entirety of the top sheet 50 in the width direction. (542).

The second shaping process is performed after the first shaping process. In the second shaping process, the first convex portion 511 is formed in the area corresponding to the first area R1, and processing is not performed on other areas. Specifically, in the region corresponding to the first region, a part of the second convex portion 512 is further stretched to form the first convex portion 511 . Among the second convex portions 512 formed by the first shaping processing, the second convex portion 512 not subjected to the second shaping processing constitutes the intermediate portion 58 . Among the second bottom portion 532 and the second opening 542 formed by the first shaping process, the second bottom portion 532 and the second opening 542 corresponding to the first region include the first bottom portion ( 531) and the first opening 541. That is, the second bottom portion 532 and the second opening 542 have the same configuration as the first bottom portion 531 and the first opening 541 .

Moreover, when performing a shaping process, you may form a welded part at the edge of an opening. The welded portion is a portion where fibers constituting the top sheet are welded. Since the welding portion is formed at the edge of the opening, the strength of the opening is increased and it is easy to maintain the opening shape. Therefore, the entrainability of excretion can be maintained.

(4) Other embodiments

Next, the absorbent article according to the modified example will be described. In addition, in description of the following modified example, about the same structure as the above-mentioned embodiment, the same code|symbol is used and description is abbreviate|omitted. Fig. 8 is a diagram schematically showing the top sheet 50 and the absorbent body 400 of the absorbent article according to Modification Example 1. As shown in Figs. The absorber 400 according to the modified example has an absorption convex portion 401 protruding toward the skin facing surface side T1 and an absorption concave portion 402 formed between the absorption convex portion 401. The absorption concave portion 402 may be recessed beyond the absorption convex portion 401 . The unit weight of the absorbent material of the absorption concave portion 402 may be lower than that of the absorption convex portion 401, and may be zero.

The first opening 541 is disposed in a region overlapping the absorption convex portion 401 and also disposed in a region overlapping the absorption concave portion 402 . By overlapping the absorption convex portion 401 and the first opening 541, the distance between the first opening 541 and the absorber 40 is short, and the bodily fluid drawn through the first opening 541 is passed through the absorber 40. can be rapidly absorbed by In addition, by overlapping the absorption concave portion 402 and the first opening 541, a space for accommodating stool can be formed on the non-skin facing side T2 of the first opening 541, and the first opening ( 541), the excrement brought in can be brought into the space. On the other hand, the first opening 541 may be disposed in a region that does not overlap with the absorption convex portion 401 or may be disposed in a region that does not overlap with the absorption concave portion 402 . Further, the second opening 542 may also be 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 topsheet 500 in the absorbent article according to Modification 2. The top sheet 500 according to Modification 2 has a groove wall portion 55 extending from the bottom portion 53 to the skin non-opposite surface side T2, and is located on the skin non-opposite surface side T2 from the groove wall portion 55. , and has a groove bottom portion 56 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. With the space between the opening 54 and the absorbent body 40, the excretion passing through the top sheet 50 can be temporarily held, and the retractability can be improved.

Fig. 10 is a cross-sectional view of a top sheet 501 in an absorbent article according to a third modification. In the top sheet 501 according to the third modification, the first convex portion 511, the intermediate portion 58, and the first concave portion 521 extend in the front-back direction. Between the 1st convex parts 511 in the width direction W, the parting part 57 is formed. The dividing part 57 is comprised so that the space extended in the front-back direction of the 1st concave part 521 may be divided. The apex of the dividing portion 57 is located closer to the skin non-facing surface side T2 than the top of the first 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 area on the skin-facing surface side T1 of the space extending in the front-back direction L of the first concave portion 521 (the area on the skin-facing surface side T1 from the dividing portion 57) is It is not divided in the direction (L), but continues in the front-back direction (L). On the other hand, the area on the non-skin facing surface side T2 of the space extending in the front-back direction L of the first concave portion 521 (the area where the dividing portion 57 is disposed) is divided in the front-back direction L, and is discontinuous in the front-back direction (L). The division part 57 is formed at intervals in the front-back direction L. Therefore, the first concave portion 521 is discontinuous in the front-back direction L at least in part. When the stool is discharged onto the first region R1 , the stool is accommodated in the first concave portion 521 between the first convex portions 511 . Due to the discontinuous portion of the first concave portion 521 in the front-back direction L, it is possible to suppress the spread of the edges accommodated in the first concave portion 521 in the front-back direction L. Moreover, since the apex of the first convex portion 511 is located closer to the skin facing surface side T1 than the apex of the dividing portion 57, the excretion within the first concave portion 521 spreads along the front-back direction L. It is easy to become, and it becomes difficult to spread along the width direction W. Therefore, side leakage of the side can be prevented.

On the other hand, in the present embodiment, “extended in the front-back direction” means any configuration having at least a certain range in the front-back direction, and extends in the width direction while inclined with respect to the front-back direction so that the angle with respect to the front-back direction is less than 45 degrees. It also includes a configuration that is. Further, "extended in the width direction" may be a configuration having at least a certain range in the width direction, and includes a configuration extending in the front-rear direction while being inclined with respect to the width direction so that the angle with respect to the width direction is less than 45 degrees. .

As described above, the content of the present invention has been disclosed through the embodiments of the present invention, but it should not be understood that the discussion and drawings forming a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operation techniques will become clear to those skilled in the art. Therefore, the technical scope of the present invention is to be determined only by the invention-specific matters according to the scope of the claims valid from the above description.

In addition, the entire contents of Japanese Patent Application No. 2016-208164 filed on October 24, 2016 are incorporated herein by reference.

The wearing assistant can provide an absorbent article capable of obtaining a sense of security during use by recognizing the area from which feces are discharged relative to other areas.

10: disposable diaper 20: front waist area
25: crotch area 30: back torso area
40, 400: absorber 401: absorption convex portion
402 absorption concave portion 45 auxiliary sheet
50, 500, 501 Top sheet 51 Sheet convex portion
511: first convex portion 512: second convex portion
52 seat concave portion 521 first concave portion
522: second concave portion 53: bottom portion
54 opening 541 first opening
542: second opening 55: groove wall portion
56: groove bottom part 57: division part
58: middle portion 59: convex wall portion
80 three-dimensional gather 84 shrinkage area
L: front-back direction R1: first area
R2: Second area T1: Skin facing side
T2: Skin non-opposite side W: Width direction

Claims (18)

a front waist region, a rear waist region, and a crotch region positioned between the front waist region and the rear waist region;
a front-back direction extending from the front waist area to the rear waist area and a width direction orthogonal to the front-and-back direction;
an absorbent body extending across the crotch region to at least one of the front waist region and the rear waist region;
a top sheet positioned closer to the skin facing surface than the absorbent body and in contact with the wearer;
The top sheet is an absorbent article having openings formed between sheet convex portions protruding toward the skin facing side,
the top sheet has a first region disposed in at least the rear waist region and a second region disposed in at least the crotch region;
The shape of the sheet convex portion in the first region and the shape of the sheet convex portion in the second region are different,
The opening is formed in at least the first region,
Between the sheet convex portions of the first region, a bottom portion extending in the front-back direction and the width direction, and a middle portion protruding toward the skin facing surface from the bottom portion are formed;
The absorbent article according to claim 1 , wherein the top of the intermediate portion is located on the non-skin facing side of the top of the sheet convex portion of the first region. a front waist region, a rear waist region, and a crotch region positioned between the front waist region and the rear waist region;
a front-back direction extending from the front waist area to the rear waist area and a width direction orthogonal to the front-and-back direction;
an absorbent body extending across the crotch region to at least one of the front waist region and the rear waist region;
a top sheet positioned closer to the skin facing surface than the absorbent body and in contact with the wearer;
The top sheet is an absorbent article having openings formed between sheet convex portions protruding toward the skin facing side,
the top sheet has a first region disposed in at least the rear waist region and a second region disposed in at least the crotch region;
The shape of the sheet convex portion in the first region and the shape of the sheet convex portion in the second region are different,
The opening is formed in at least the first region,
a waist circumference holding portion extending along the width direction and holding the absorbent article on a wearer's body in the front waist region and the rear waist region;
The absorbent article according to claim 1 , wherein a rear edge of the first region is positioned forward of the waist circumference holding portion. The absorbent article according to claim 1 or 2, comprising a pair of three-dimensional gathers arranged on both outer sides of the absorbent article in the width direction from the center in the width direction,
Each of the three-dimensional gathers has a contraction area that contracts in the front-back direction by an elastic member,
The bending rigidity of the first region is higher than that of the second region,
The absorbent article according to claim 1 , wherein the first region is disposed across the rear edge of the constricted region in the front-back direction. The absorber according to claim 3, wherein the absorber has a bend guide portion along the width direction and guides the absorbent article to be bent,
The absorbent article according to claim 1 , wherein the bend guide portion is formed forward of the first region in a range in which the constriction region is disposed in the front-back direction. The absorbent article according to claim 1 or 2, wherein a height of the sheet convex portion in the first region is higher than a height of the sheet convex portion in the second region. The absorbent article according to claim 1 or 2, wherein a pitch of the sheet convex portions in the first region is longer than a pitch of the sheet convex portions in the second region. The absorbent article according to claim 1 or 2, wherein a welded portion to which fibers constituting the top sheet are welded is formed at an edge of the opening. The absorbent body according to claim 1 or 2, wherein the absorber has an absorption convex portion protruding toward the skin facing side and an absorption concave portion formed between the absorption convex portion,
The absorbent article according to claim 1 , wherein the opening of the first region is disposed in a region overlapping the absorption convex portion. The absorbent body according to claim 1 or 2, wherein the absorber has an absorption convex portion protruding toward the skin facing side and an absorption concave portion formed between the absorption convex portion,
The absorbent article according to claim 1 , wherein the opening of the first region is disposed in a region overlapping the absorbent concave portion. The method according to claim 1 or 2, wherein the sheet convex portion has a convex wall portion extending toward the skin facing surface side,
An upward angle of the convex wall portion of the first region is greater than an upward angle of the convex wall portion of the second region. The method according to claim 10, wherein the top sheet has fibers,
A space is formed between the sheet convex portion and the absorber,
The absorbent article according to claim 1 , wherein the fibers in the convex wall portion have more fibers oriented along the thickness direction of the topsheet than fibers oriented along the longitudinal direction and the width direction. The method according to claim 1 or 2, wherein between the sheet convex portions, there is a groove wall portion extending toward the non-skin facing side,
The absorbent article according to claim 1 , wherein the opening is formed in the groove wall portion. The absorbent article according to claim 1 or 2, wherein the sheet convex portions of the first region are arranged in a zigzag pattern. The sheet convex portion of the first region is along the front-back direction according to claim 1 or 2,
The absorbent article is characterized in that a dividing portion is formed between the sheet convex portions of the first region to divide a space extending in the front-back direction between the sheet convex portions. The height of the sheet convex portion is 0.3 mm or more and 10.0 mm or less, according to claim 1 or 2,
The absorbent article wherein the pitch of the sheet convex portions is 0.3 mm or more and 10.0 mm or less. The method according to claim 1 or 2, wherein the outer edge of the top sheet is located inward in the width direction from the outer edge of the absorber,
An auxiliary sheet positioned on the skin facing surface side of the absorber is provided outside the outer edge of the absorber in the width direction,
The auxiliary sheet and the top sheet are made of nonwoven fabric,
An absorbent article wherein a distance between fibers of the auxiliary sheet is longer than a distance between fibers of the top sheet. The absorbent article according to claim 1 or 2, comprising a pair of three-dimensional gathers arranged on both outer sides of the absorbent article in the width direction from the center in the width direction,
The absorbent article according to claim 1 , wherein an outer edge of the topsheet is positioned outside the inner edge of the three-dimensional gather in the width direction when the absorbent article is in an extended state. delete

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