JP6668217B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article that absorbs urine and stool.

  2. Description of the Related Art Conventionally, in an absorbent article that absorbs urine and stool of a wearer, there has been provided an absorbent article in which an opening (liquid guide recess) for drawing in excrement is provided in a top sheet (for example, see Patent Document 1). . The top sheet of Patent Literature 1 has a plurality of protrusions protruding toward the skin-facing surface, and an opening disposed between the protrusions and penetrating in the thickness direction of the top sheet.

JP 2009-89965 A

  The protrusions and openings of the top sheet of Patent Literature 1 are regularly arranged in the same arrangement over the entire top sheet at regular intervals in the front-rear direction and the width direction. Therefore, a wearing assistant such as a mother may recognize the convex portion and the opening as a pattern, and may not be able to recognize the presence of the opening for drawing in excrement. The wearing assistant may not be able to grasp the body fluid retraction of the top sheet and may not be able to use the absorbent article with peace of mind. When the applicant conducted various investigations, it was found that the wearing assistant could easily obtain a sense of security during use by being able to grasp the retraction of the area from which the stool was discharged.

  Therefore, an object of the present invention is to provide an absorbent article that makes it easier for a wearing assistant to recognize the pull-in property of an area from which stool is discharged, and that can provide a sense of security during use.

  The absorbent article (disposable diaper 10) according to the present disclosure is located between a front waist region (a front waist region 20), a rear waist region (a rear waist region 30), and the front waist region and the rear waist region. A crotch region (inseam region 25), a front-rear direction (front-rear direction L) from the front waist region to the rear girth region, and a width direction (width direction W) orthogonal to the front-rear direction; An absorbent body (absorbent body 40) extending to at least one of the front waistline area and the rear waistline area, and a top sheet (top sheet 50) located on the skin-facing surface side of the absorbent body and in contact with the wearer, The top sheet has a sheet protrusion (sheet protrusion 51) protruding toward the skin facing surface side and an opening (opening 54) provided between the sheet protrusions. The top sheet has at least a first region (first region R1) arranged in the rear waist region and a second region (second region R2) arranged in at least the crotch region. The point is that the shape of the sheet protrusion in one region is different from the shape of the sheet protrusion in the second region, and the opening is provided at least in the first region.

  According to the present disclosure, the wearing assistant can recognize the area from which the stool is discharged to other areas, and can obtain a sense of security during use.

It is a development top view of a disposable diaper concerning this embodiment. FIG. 2 is a sectional view taken along line AA shown in FIG. 1. It is the top view which expanded a part of top sheet of the disposable diaper shown in FIG. FIG. 4 is a sectional view taken along line BB shown in FIG. 3. FIG. 4 is a sectional view taken along the line CC shown in FIG. 3. It is a partially broken perspective view which shows the 1st area | region of a topsheet typically. It is a partially broken perspective view schematically showing a second region of the top sheet. FIG. 9 is a perspective view of a top sheet and an absorber according to a first modification. It is sectional drawing of the top sheet concerning the modification 2. 13 is a perspective view of a top sheet according to Modification Example 3. FIG.

  At least the following matters will be made clear by the description in the present specification and the accompanying drawings.

Front waist area, rear waist area, and crotch area located between the front waist area and the rear waist area,
A width direction orthogonal to the front-rear direction and the front-rear direction toward the rear waist region from the front waist region,
Absorber straddling the crotch region and extending to at least one of the front waist region and the rear waist region,
A top sheet that is located on the skin-facing surface side of the absorber and is in contact with the wearer;
The top sheet is an absorbent article having an opening provided between sheet protrusions protruding toward the skin facing surface side,
The top sheet has at least a first area arranged in the rear waist area and at least a second area arranged in the crotch area,
The shape of the sheet protrusion in the first region and the shape of the sheet protrusion in the second region are different,
The absorbent article, wherein the opening is provided at least in the first region.

  According to such an absorbent article, the first region is arranged at least in the rear waistline region and includes a region from which stool is discharged. The second region is disposed at least in the crotch region and includes a region from which urine is discharged. The wearing assistant can easily recognize the first region because the shape of the sheet convex portion in the first region is different from the shape of the sheet convex portion in the second region. In addition, since 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 wearing assistant has the performance of the top sheet arranged in the crotch region and the top arranged in the rear waist region. The difference between the performance of the seat and the seat can be grasped, and a sense of security that urine and stool are properly absorbed can be obtained.

  When the stool is discharged onto the first area, the stool is accommodated in the space between the sheet protrusions and shifts to the non-skin-facing surface side via the opening between the sheet protrusions. In addition, since the stool is sandwiched between the walls by the sheet protrusion, once the stool stored between the sheet protrusions touches the skin, the stool comes out from between the sheet protrusions and reattaches to the wearer. Can be suppressed.

Such an absorbent article,
A pair of three-dimensional gathers arranged on both outer sides in the width direction than the center in the width direction of the absorbent article,
Each of the three-dimensional gathers has a contraction region that contracts in the front-rear direction by an elastic member,
The bending rigidity of the first region is higher than the bending rigidity of the second region,
It is preferable that the first region is disposed so as to straddle a rear edge of the contraction region in the front-rear direction.

  Since the first region straddles the rear end of the contracted region in the front-rear direction, the rigidity near the rear end of the contracted region, which is the starting point of the three-dimensional gather, increases. By increasing the rigidity of the starting point of the three-dimensional gather, it is easy to secure the height of the three-dimensional gather. Therefore, lateral leakage of the stool in the rear waist area can be prevented. Further, by ensuring the height of the three-dimensional gathers, it is possible to prevent the top sheet from being covered by the three-dimensional gathers, and to continue to exhibit the function of guiding the discharged stool between the first area sheet convex portions.

Such an absorbent article,
The absorber has a bending guide portion that guides the bending of the absorbent article along the width direction,
It is preferable that the bending guide portion is provided on the front side of the first region in a range where the contraction region is arranged in the front-rear direction.

  The range in which the contraction region is arranged in the front-back direction shrinks in the front-rear direction due to the contraction of the contraction region. When a contracting force is applied by the contracting region, the absorbent article is deformed based on the bending guide portion. By deforming 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, the first region is kept flat, and the function of drawing stool is continued. Can be.

Such an absorbent article,
It is preferable that the height of the sheet convex portion in the first region is higher than the height of the sheet convex portion in the second region.

  Since the height of the sheet protrusions in the first area is higher than the height of the sheet protrusions in the second area, the wall formed by the sheet protrusions sandwiching the stool can be formed relatively high. Since the wall formed by the sheet convex portions sandwiching the stool is high, the stool once housed between the sheet convex portions is sandwiched by the wall, and the stool is easily held. As a result, when the skin of the wearer touches the surface of the stored stool, the stool can be kept held, and the stool can be prevented from coming out and reattaching to the wearer.

  Further, since the height of the sheet convex portion in the first region is relatively high, the gap between the skin and the absorber in the first region becomes large. The air permeability increases, and the air inside the absorbent article easily flows out to the outside, so that stuffiness can be suppressed. Further, before the stool is accommodated between the sheet convex portions of the first region, the first region is subjected to the body pressure and the sheet convex portion is crushed, and the first region is subjected to the sheet convex without the body pressure being applied. The thickness of the top sheet changes depending on the state in which the portion stands. Since the height of the sheet convex portion in the first region is relatively high, the amount of change in the thickness of the top sheet due to the presence or absence of body pressure is large, so that air can flow more easily and the effect of suppressing stuffiness can be easily obtained. On the other hand, since the height of the sheet convex portion in the second region is relatively low, the accommodation space between the sheet convex portions is reduced, and the stool stored in the first region can be suppressed from flowing to the second region. In addition, a large amount of stool can be accommodated between the sheet convex portions of the first region, and the stool easily passes through the opening due to its own weight, and the amount of stool guided to the absorber through the opening can be increased.

Such an absorbent article,
It is preferable that the pitch of the sheet protrusions in the first region is longer than the pitch of the sheet protrusions in the second region.

  Since the pitch of the sheet protrusions in the first region is longer than the pitch of the sheet protrusions in the second region, the space between the sheet protrusions in the first region is widened, and the space for storing stool can be formed wide. Therefore, the stool discharged on the top sheet is stored between the convex portions of the sheet, and hardly remains on the convex portion of the sheet. It is possible to prevent the stool from continuing to touch the skin of the wearer and improve the feeling of wearing. Further, a large amount of stool can be held between the sheet convex portions of the first region, and the weight of the stool increases. In the case of the top sheet having fibers, the weight of the stool increases, so that the water contained in the stool easily permeates through the gap between the fibers to the absorber. Therefore, the water in the stool can be promptly transferred to the absorber, and the soft stool containing a large amount of water can be prevented from continuing to adhere to the skin.

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

  Since the welded portion is formed at the edge of the opening, the strength of the opening is increased and the shape of the opening is easily maintained. Therefore, the excrement pull-in property can be maintained.

Such an absorbent article,
The absorber has an absorption concave portion provided between the absorption convex portion and the absorption convex portion projecting toward the skin facing surface side,
It is preferable that the opening of the first region is arranged in a region overlapping with the absorption protrusion.

  In the region where the absorption protrusion 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, the excrement pull-in property can be improved.

Such an absorbent article,
The absorber has an absorption concave portion provided between the absorption convex portion and the absorption convex portion projecting toward the skin facing surface side,
It is preferable that the opening of the first region is arranged in a region overlapping with the absorbing recess.

  In a region where the absorption concave portion and the opening overlap, a space for accommodating stool can be formed on the non-skin-facing surface side of the opening, and excrement drawn through the opening can be drawn into the space. Therefore, the excrement pull-in property can be improved.

Such an absorbent article,
The sheet convex portion has a convex wall portion extending to the skin facing surface side,
It is preferable that a rising angle of the convex wall portion in the first region is larger than a rising angle of the convex wall portion in the second region.

  The rising angle of the convex wall in the first region is larger than the rising angle of the convex wall in the second region, and the convex wall in the first region has a relatively steep inclination. Therefore, the excrement stored between the sheet convex portions of the first region can be held between the convex portions, and the excrement once stored can be prevented from falling out from between the sheet convex portions. The rising angle of the convex wall portion in the second region is smaller than the rising angle of the convex wall portion in the first region, and the convex wall portion in the second region has a relatively gentle inclination. The second region is arranged at least in a crotch region. The inseam area is more closely adhered to the wearer's skin than the rear waist area. Since the convex wall portion of the second region has a gentle inclination, even when the second region is in close contact with the skin, the contact of the sheet convex portion with the skin can be reduced.

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 have more fibers oriented along the thickness direction of the top sheet than fibers oriented along the front-rear direction and the width direction.

  The convex portion of the sheet is not easily crushed, the space on the non-skin-facing surface side of the convex portion of the sheet is maintained, the contact with the skin is softened, and the wearer can obtain a fluffy feel. In addition, since the fibers formed by the convex wall portions include a large amount of fibers oriented in the thickness direction, the convex wall portions facilitate guiding body fluid in the thickness direction. Therefore, even when the height of the sheet convex portion is set high, the body fluid in the convex wall portion can be quickly led to the absorber side.

Such an absorbent article,
A bottom portion extending in the front-rear direction and the width direction and an intermediate portion projecting more toward the skin-facing surface than the bottom portion are provided between the sheet convex portions of the first region,
It is preferable that the top of the intermediate portion is located closer to the non-skin-facing surface than the top of the sheet protrusion in the first region.

  Since the intermediate portion is provided between the sheet convex portions of the first region, the excrement in the space between the sheet convex portions is less likely to diffuse in a plane direction including the front-rear direction and the width direction. Therefore, it is possible to quickly guide the stool to the absorber side and to suppress an increase in the area where the stool adheres to the skin.

Such an absorbent article,
In the front waist region and the rear waist region, having a waist holding portion extending along the width direction and holding the absorbent article on a wearer's body,
It is preferable that a rear end edge of the first region is located on a front side of the waist holding portion.

  The waist circumference holding section is an area for holding the absorbent article on the body, and easily adheres to the body. Since the first area and the waist circumference holding part are separated from each other, it is easy to maintain the state in which the stool stored between the sheet convex parts of the first area is separated from the wearer's skin. Further, in a configuration in which the sheet convex portion of the first region is higher than the sheet convex portion of the second region, the sheet convex portion of the second region hardly adheres to the skin, and the crotch region due to the sheet convex portion of the second region. Discomfort can be suppressed.

Such an absorbent article,
Between the sheet convex portions, has a groove wall portion extending to the non-skin facing surface side,
Preferably, the opening is provided in the groove wall.

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

Such an absorbent article,
It is preferable that the sheet convex portions of the first region are arranged in a staggered manner.

  Since the space between the sheet convex portions is not continuous in the front-rear direction or continuous in the width direction, the spread of feces in the planar direction can be suppressed.

Such an absorbent article,
The sheet convex portion of the first region extends along the front-back direction,
It is preferable that a dividing portion for dividing the space extending in the front-rear direction between the sheet convex portions is provided between the sheet convex portions in the first region.

  Since the dividing portion that divides the space extending in the front-rear direction is provided, it is possible to suppress the stool stored in the seat recess from diffusing in the front-rear direction.

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 desirable that the pitch of the sheet convex portions is 0.3 mm or more and 10.0 mm or less.

  According to the seat protrusion configured as described above, an uncomfortable feeling caused by the seat protrusion being too conspicuous is suppressed, and the wearing assistant can easily obtain a sense of security. Further, since the convex portions of the sheet can be visually recognized, a sense of security with respect to the absorption performance of the convex portions of the sheet can be easily obtained.

Such an absorbent article,
The outer edge of the top sheet is located on the inner side in the width direction than the outer edge of the absorber,
On the outer side in the width direction than the outer edge of the absorber, an auxiliary sheet located on the skin-facing surface side of the absorber is provided.
The auxiliary sheet and the top sheet are configured by a nonwoven fabric,
It is desirable that the inter-fiber distance of the auxiliary sheet is longer than the inter-fiber distance of the top sheet.

  Since the inter-fiber distance of the auxiliary sheet is relatively long, body fluid is easily drawn in by the auxiliary sheet. Since the auxiliary sheet with higher retraction is arranged on the outside in the width direction than the outer edge of the top sheet, the excrement diffused to the outside in the width direction beyond the top sheet is drawn into the absorber by the auxiliary sheet. And the leakage of excrement can be suppressed.

Such an absorbent article,
A pair of three-dimensional gathers arranged on both outer sides in the width direction than the center in the width direction of the absorbent article,
In a state where the absorbent article is extended, it is preferable that an outer edge of the top sheet is located outside of an inner edge of the three-dimensional gather in a width direction.

  In the state where the absorbent article is extended, the outer edge of the top sheet is located outside in the width direction than the inner edge of the three-dimensional gather, so in the state before use of the absorbent article, the entire area between the inner edges of the three-dimensional gather is provided. A top sheet is placed. By visually recognizing the sheet protrusions and openings of the top sheet, the wearing assistant obtains a sense of security with respect to the absorption performance, feels a wider area where the top sheet is arranged, and can obtain a sense of security.

=== About the disposable diaper according to the present embodiment ===
Next, an embodiment of a disposable diaper 10 as an absorbent article according to the present invention will be described with reference to the drawings. 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 the following description of the drawings, the same or similar portions are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, parts having different dimensional relationships and ratios between drawings may be included.

(1) Overall Schematic Configuration of Disposable Diaper FIG. 1 is a developed plan view of a disposable diaper 10 according to the present embodiment. The expanded plan view shown in FIG. 1 is a view of an extended state in which elastic parts such as a three-dimensional gather and a waist elastic part are extended until wrinkles of a top sheet 50, a side sheet 70, and the like constituting the disposable diaper are not formed. . FIG. 2 is a sectional view taken along line AA shown in FIG.

  The disposable diaper 10 has a front waist region 20, a crotch region 25, and a back waist region 30. The front waistline region 20 is a portion in contact with the wearer's front waistline (belly portion). The rear waistline region 30 is a portion in contact with the wearer's rear waistline (back portion). The inseam region 25 is located between the front waistline region 20 and the rear waistline region 30. In the present embodiment, a direction from the front waistline region 20 to the rear waistline region 30 is referred to as a front-rear direction L, a direction orthogonal to the front-rear direction L is referred to as a width direction W, and is different from the wearer's skin facing surface side T1. The direction extending to the skin facing surface side T2 is referred to as the thickness direction T.

  The disposable diaper 10 has an absorber 40. Absorber 40 straddles crotch region 25 and extends to at least one of front waist region 20 and rear waist region 30. Absorbent body 40 of the present embodiment is arranged straddling front waist region 20, crotch region 25, and rear waist region 30. The absorber 40 has an absorbent core 40a and a core wrap 40b.

  In the crotch region 25 of the absorber 40, a first low 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. The first low weight parts 41 are respectively arranged on both outer edges of the absorbent core 40a, and are arranged at intervals in the front-rear direction L. In the rear waistline region 30 of the absorbent core 40a, a second low weight portion 42 extending forward from a rear end edge of the absorbent core 40a is formed. The length in the width direction of the second low weight portion 42 is formed to be shorter toward the front side. The first low weight portion 41 and the second low weight portion 42 are portions where the weight of the absorbent material is lower than the surrounding absorbent core. The first low-priced portion 41 and the second low-priced portion 42 of the present embodiment are notches. In addition, the 1st low-gage part 41 and the 2nd low-gage part 42 do not need to be provided.

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

  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 a nonwoven fabric. The inter-fiber distance of the auxiliary sheet 45 is longer than the inter-fiber distance of the top sheet 50. Since the inter-fiber distance of the auxiliary sheet is relatively long, body fluid is easily drawn in by the auxiliary sheet. Since the auxiliary sheet with higher retractability is arranged on the outer side in the width direction than the outer edge of the top sheet, it is possible for the auxiliary sheet to draw in the stool diffused outside the width direction beyond the top sheet to the absorber side. It is possible to suppress stool leakage. Note that the auxiliary sheet need not be provided. In the form without the 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 intrusion method (JIS R 1655). In the mercury intrusion method, the pressure applied to mercury when mercury is injected between constituent fibers of a fibrous structure (top sheet and auxiliary sheet) to be measured, and the pressure in the space between constituent fibers of the fibrous structure By measuring the volume of mercury pushed into the fiber structure, information on the structure of the fibrous structure can be obtained.

Specifically, the inter-fiber distance of the fiber structure can be measured using a mercury porosimeter according to the following procedure.
1) A fibrous structure to be measured is cut into 24 mm x 15 mm to prepare a measurement sample. Three measurement samples are prepared.
2) After setting three measurement samples in a sample cell of a mercury porosimeter (manufactured by Shimadzu Corporation) so that they do not overlap each other, while gradually changing the pressure applied to mercury, the structure of the fiber structure The volume of mercury (ie, pore volume) pushed into the space between fibers (ie, pores) is measured. The measurement is performed in an environment of 22 ° C. and 65% RH.
3) The pore diameter D (μm) of the pores (that is, the inter-fiber distance (μm) of the fibrous structure) is calculated according to the following equation (1), and the relationship between the pore diameter D and the pore volume is calculated as Obtained as a distribution curve (differential / integral curve) of the pore diameter D. The various measurement conditions in the following formula (1) are as follows: 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).
Formula (1) D = -4γcosθ / P
(Where D is the pore size (distance between fibers), γ is the surface tension of mercury, θ is the contact angle, and P is the pressure.)

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

  A pair of three-dimensional gathers 80 is disposed on both outer sides in the width direction of the disposable diaper 10 from the center in the width direction. The three-dimensional gather 80 is a standing gather that can stand on the wearer side. The three-dimensional gather 80 includes a side sheet 70 and a 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 seat 70. The pair of three-dimensional gathers 80 are substantially line-symmetric with respect to the center of the width of the disposable diaper in the width direction. Each of the three-dimensional gathers 80 has a side elastic member 71 that expands and contracts in the front-rear direction, and a standing part 83 that can stand on the wearer side, and is located outside the standing part 83 in the width direction, and the standing part 83 is standing. It has a first fixing portion 81 serving as a starting point of (rise), and a second fixing portion 82 located on both outer sides in the front-rear direction L of the standing portion 83 and serving as a starting point of the rising portion 83. The front edge of the upright portion 83 coincides with the rear edge of the second fixing portion 82 arranged in the front waist region 20, and the rear edge of the upright portion 83 is the first fixing portion arranged in the rear waist region 30. Matches the leading edge of 81.

  The side sheet 70 covers the outer edge of the top sheet 50 and the outer edge of the auxiliary sheet 45. In a state where the absorbent article is extended, the inner edge of the three-dimensional gather (the inner edge of the side sheet 70) is located inside the outer edge of the top sheet in the width direction. In the state where the absorbent article is extended, the outer edge of the top sheet is located outside in the width direction than the inner edge of the three-dimensional gather, so in the state before use of the absorbent article, the entire area between the inner edges of the three-dimensional gather is provided. A top sheet is placed. By visually recognizing the top sheet, the wearing assistant obtains a sense of security with respect to the absorption performance, and can feel a wider sense of the arrangement area of the top sheet, thereby obtaining a sense of security.

  The side sheet 70 is joined to the top sheet 50 or the auxiliary sheet 45 at the first fixing portion 81 and the second fixing portion 82. The upright portion 83 is provided between the second fixing portions 82 in the front-rear direction L and is not joined to the top sheet 50, so that it can stand up from the top sheet 50 or the like. The standing portion 83 stands on the wearer with the side elastic member contracted. The standing portion 83 stands on the wearer side in a state where the disposable diaper is worn. The upright portion 83 has a contraction region 84 in which the side elastic member 71 is arranged to be contractable. The contraction region 84 is a region where the side elastic member 71 is joined in an extended state in an extended state in which the disposable diaper is extended. The contraction region 84 is a region where the side elastic member 71 is not arranged in the upright portion 83, except for a region where the side elastic member 71 in the non-extended state is joined, and the side elastic member 71 is joined to the side sheet 70. This is a concept that excludes areas that are not in use. The three-dimensional gather 80 forms a wall rising on the skin-facing surface side T1 at the outer edge of the absorber 40 to prevent lateral leakage of excrement.

  On the outer edge of the disposable diaper 10, a leg opening 13 arranged around the wearer's leg is formed. The disposable diaper 10 is provided with a pair of leg extendable portions 75 that are arranged on the inner side in the width direction than the leg opening 13 and are extendable in the front-rear direction L. The leg elastic portions 75 are respectively arranged on the inner side in the width direction than the left and right leg openings 13.

  The fastening tapes 90 are a pair, and extend outward in the width direction W from the side sheets 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 for fastening to the target portion 95 in the front waistline region 20. The fastening portion 91 is, for example, a portion provided with an engagement hook. Fastening tape 90 holds disposable diaper 10 to the wearer's body by being fixed to target portion 95 of front waistline region 20. The region between the fastening portions 91 of the pair of fastening tapes is a region that is held by the body at the time of wearing, and constitutes a waist holding portion.

  The target portion 95 is provided on the non-skin-facing surface side T2 of the exterior sheet 60 in the front waistline region 20. The target portion 95 is configured such that an engaging hook of the fastening tape 90 is hooked, and functions as a loop of a hook and loop locking system. The disposable diaper may be a pants-type diaper that does not have the fastening tape 90 and the target portion 95. In a pants-type diaper, a region between side joints that join the front waistline region and the rear waistline region constitutes a waistline holding unit.

  The disposable diaper 10 has a waist elastic portion 85 that can expand and contract in the width direction. The waist elastic portion 85 is arranged in the rear waistline region 30. The waist elastic portion 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 portion 85 may not be provided.

(2) Configuration of Topsheet Next, the configuration of the topsheet 50 will be described in detail. FIG. 3 is an enlarged plan view of the top sheet. The top sheet 50 has a sheet convex portion 51 protruding toward the skin facing surface side T1, and a sheet concave portion 52 provided between the sheet convex portions 51. In FIGS. 1 and 2, the sheet convex portion 51 and the sheet concave portion 52 are omitted. The sheet convex portion 51 projects 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 toward the skin facing surface side T1. The top of the sheet convex portion 51 is rounded. The sheet convex portions 51 are arranged at intervals in the front-rear direction L and the width direction W, and are arranged in a staggered manner in plan view. Here, the staggered shape is a state in which they are not arranged side by side in the front-rear direction L and the width direction W, but are shifted 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 convex wall portion 59 extends from the top to the bottom 53 of the sheet convex portion 51.

  The sheet concave portion 52 is a space sandwiched between the sheet convex portions 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 on the non-skin-facing surface side T2 of the sheet concave portion 52 is a bottom portion 53, and the skin-facing surface of the sheet concave portion 52 is a virtual surface connecting the tops of the convex wall portions 59. 4 and 5, the region of the sheet concave portion 52 is shown by hatching.

  The bottom 53 extends in the front-rear direction L and the width direction W. An opening 54 is formed between the sheet protrusions 51. The opening 54 penetrates the bottom 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. Note that 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 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 shown with different hatching. The first region R1 is arranged at least in the rear waistline region 30. Therefore, the stool is mainly discharged onto the first region R1. When the stool is discharged onto the first region R1, the stool is stored in the sheet concave portion 52 between the sheet convex portions 51. The second region R2 is located on the front side of the first region R1 and at least in the crotch region 25. Therefore, urine is mainly discharged onto the second region R2. When the urine is discharged onto the first region R1, the urine is guided to the absorber 40 while diffusing in the front-rear direction L and the width direction W by the sheet concave portion 52. The second region R2 may be disposed at least in front of the first region R1, but the second region R2 of the present embodiment is disposed over the entire region of the top sheet 50 other than the first region R1. , 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. FIGS. 5 and 7 are diagrams schematically showing the top sheet 50 in the second region R2. The sheet convex portion 51 has a first convex portion 511 that is the sheet convex portion 51 of the first region R1, and a second convex portion 512 that is the sheet convex portion 51 of the second region R2. The sheet concave portion 52 has a first concave portion 521 which is the sheet concave portion 52 in the first region R1, and a second concave portion 522 which is the sheet concave portion 52 in the second region R2. The bottom 53 has a first bottom 531 that is the bottom 53 of the first region R1, and a second bottom 532 that is the bottom 53 of the second region R2. The opening 54 has a first opening 541 that is an opening 54 of the first region R1 and a second opening 542 that is an opening 54 of the second region R2. The opening 54 may be provided at least in the first region R1.

  The shape of the top sheet 50 in the first region R1 is different from the shape of the top sheet 50 in the second region R2. More specifically, at least the shape of the first protrusion 511 and the shape of the second protrusion 512 are different. The configuration in which the shape of the sheet convex portion 51 is different includes the length of the sheet convex portion 51 in the width direction, the length of the sheet convex portion 51 in the front-rear direction L, the height of the sheet convex portion 51 (length in the thickness direction), The configuration is such that the pitch of the sheet protrusions 51 and at least a part of the shape (circle, rectangle, etc.) of the sheet protrusions 51 in plan view are different. In the top sheet 50 of the present embodiment, the height 511H of the first protrusion 511 and the height 512H of the second protrusion 512 are different, and the pitch P1 of the first protrusion 511 and the pitch P2 of the second protrusion 512 are different. different. Since the shape of the first convex portion 511 and the shape of the second convex portion 512 are different, it becomes easier for the wearing assistant to recognize the first region R1. Also, since the shape of the first convex portion 511 and the shape of the second convex portion 512 are different from each other, the performance of the top sheet arranged in the crotch region and the performance of the top sheet arranged in the rear waist region are reduced. Can be grasped, and a sense of security that urine and stool are properly absorbed can be obtained.

  Further, the shape of the first recess 521 and the shape of the second recess 522 may be different. The configuration in which the shape of the sheet recess 52 is different includes 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. The configuration is at least partially different.

  A first convex portion 511, a first concave portion 521, an intermediate portion 58, a first bottom portion 531, and a first opening 541 are formed in the top sheet 50 in the first region R1. The intermediate portion 58 is provided between the adjacent first convex portions 511. The height of the intermediate portion 58 is lower than the height of the first convex portion 511. The intermediate portion 58 protrudes from the first bottom portion 531 to the skin-facing surface side T1. The top of the intermediate portion 58 is located closer to the non-skin facing surface side T2 than the top of the first convex portion 511. Around the intermediate portion 58, a first bottom portion 531 is arranged. In the cross section at the position where the intermediate portion 58 is provided (the cross section shown in FIG. 4), the top sheet 50 is adjacent to the first convex portion 511, the first concave portion 521, and the first convex portion 511 in this order. In the first concave portion 521, the first bottom 531, the first opening 541, the first bottom 531, the intermediate portion 58, the first bottom 531, the first opening 541, and the first bottom 531 are arranged in this order. Are provided adjacent to each other. The intermediate portion 58 may not be provided, and the first convex portion 511 may be provided instead of the intermediate portion 58.

  A second convex portion 512 and a second concave portion 522 are formed on the top sheet 50 in the second region R2. No intermediate portion is formed in the top sheet 50 in the second region R2. The second convex portions 512 are arranged in a staggered manner. In the cross-section of the second region R2 (cross-section shown in FIG. 5), the top sheet 50 is provided with the respective portions adjacent to each other in the order of the second convex portion 512, the second concave portion 522, and the second convex portion 512, In the second concave portion 522, the respective portions are provided adjacent to each other in the order of the second bottom portion 532, the second opening 542, and the second bottom portion 532.

  Since the top sheet 50 is provided with the plurality of sheet concave portions 52 and the 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 absorber 40, the bodily fluid drawn by the top sheet 50 can be drawn into the space, and excrement can be quickly absorbed by the absorber, and Body fluid can be suppressed from remaining.

  When the stool is discharged onto the first region R1 in the top sheet 50 thus configured, the stool is stored in the first concave portion 521 between the first convex portions 511. The stool is sandwiched between the first convex portions 511 and stays in the first concave portions 521. By accommodating the stool in the first concave portion 521, the contact area between the wearer and the stool is reduced. Since the stool is sandwiched between the walls by the first protrusions 511, once the stool stored between the first protrusions 511 touches the skin, the stool comes out from between the first protrusions and reattachs to the wearer. Can be suppressed. Therefore, it is possible to suppress an increase in the area where the stool adheres to the skin. The provision of the intermediate portion 58 between the first convex portions 511 makes it difficult for excrement in the space between the first convex portions 511 to diffuse in the front-rear direction L and the width direction W. The first convex portions 511 are arranged in a staggered manner, and the first concave portions 521 are divided in the front-rear direction L and the width direction W. Therefore, the stool stored in the first concave portion 521 is unlikely to spread along the front-rear direction L and the width direction W. Soft stool containing a large amount of water moves to the absorber 40 through the first opening 541 of the first recess 521.

  In the top sheet 50 configured as described above, when urine is discharged onto the second region R2, the urine is inclined with respect to the front-rear direction L via the second concave portion 522 between the second convex portions 512. And diffuses in an oblique direction inclined with respect to the width direction W. Urine has a high fluidity, and diffuses in a planar direction along the second bottom 532, and moves to the absorber 40 through the second opening 542 formed in the second bottom 532. As described above, urine is diffused in the second region R2, urine is rapidly transferred to the absorber, and loose stool and body fluid are transferred to the absorber 40 in the first region R1, and solid stool is maintained. Thereby, attachment of body fluid and loose stool to the wearer's skin can be suppressed, and the feeling of wearing can be improved. The first region R1 and the second region R2 of the top sheet can appropriately absorb urine and feces having different properties.

  The height R1H of the top sheet 50 in the first region R1 (which is the length from the first bottom 531 to the top of the first protrusion 511 and corresponds to the height 511H of the first protrusion 511) is the second region R1H. The height of the top sheet 50 at R2 (the length from the second bottom portion 532 to the top of the second convex portion 512 and corresponds to the height 512H of the second convex portion 512) is higher than R2H. Since the height of the top sheet 50 in the first region R1 is relatively high, the wearer's skin can be separated from the absorber 40 in the first region R1, and the body fluid absorbed by the absorber 40 is And it is easy to keep the wearer's skin dry.

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

  Further, since the height of the first convex portion 511 is relatively high, the gap between the skin and the absorber 40 in the first region R1 becomes large. The air permeability increases, and the air inside the diaper flows out to the outside of the diaper, thereby suppressing stuffiness. In addition, before the stool is accommodated between the first convex portions 511, the first region R1 is crushed by the body pressure on the first region R1, and the first region R1 is not crushed by the body pressure. The thickness of the top sheet 50 changes between the state where the first convex portion 511 is upright. Since 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, so that air can flow more easily and the effect of suppressing stuffiness can be easily obtained. In addition, a large amount of stool can be accommodated between the first convex portions 511, and the stool easily passes through the opening 54 by its own weight, and the amount of stool guided to the absorber 40 through the opening 54 can be increased. .

  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 touch in the second region R2 can be improved. The inseam region 25 contacts the excretion opening of the wearer. The inseam region 25 is in closer contact with the wearer's skin than the rear waist region 30. Since the height 512H of the second convex portion 512 of the second region R2 corresponding to 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, the second convex portion 512 is formed. Can reduce the contact with the skin. The touch is improved, and the wearing feeling of the wearer is improved. From the viewpoint of improving such a feeling of wearing, the area of the second region R2 may be larger than the area of the first region R1. By providing a large area of the second region R2 having a suitable touch, the wearing feeling can be further improved. In addition, since the height of the second convex portion 512 is relatively low, the accommodation space of the second concave portion 522 is reduced, and the flow of the stool accommodated in the first region R1 to the second region R2 can be suppressed.

  The pitch P1 of the first protrusion 511 is longer than the pitch P2 of the second protrusion 512. The space between the first convex portions 511 is widened, and the space for storing the stool can be widened. Therefore, the stool discharged on the top sheet 50 is accommodated between the first convex portions 511, and hardly remains on the first convex portions 511. It is possible to prevent the stool from continuing to touch the skin of the wearer and improve the feeling of wearing. In addition, many flights can be held between the first convex portions 511, and the weight of the flights increases. In the case of the top sheet having fibers, the weight of the stool increases, so that the water contained in the stool easily permeates through the gap between the fibers to the absorber. Therefore, the water in the stool can be promptly transferred to the absorber, and the soft stool containing a large amount of water can be prevented from continuing to adhere to the skin. In addition, the second region that mainly absorbs urine can have a smooth tactile sensation, and the first region that mainly absorbs stool can have a thick tactile sensation that firmly absorbs urine. By providing portions having different tactile sensations in one top sheet of the disposable diaper, the wearer can perceive a function that is gentle on the skin and a function that firmly absorbs stool.

  The pitch of the first convex portions is not constant, and the pitch between the first convex portions arranged with the intermediate portion interposed therebetween is longer than the pitch between the first convex portions not arranged with the intermediate portion interposed therebetween. . It is only necessary that the pitch of the longest first protrusion is longer than the pitch of the longest second protrusion.

The height of the sheet convex portion 51 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. 5 mm or less. The pitch of the sheet protrusions 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. It is as follows. According to the seat convex portion 51 configured as described above, an uncomfortable feeling caused by the seat convex portion 51 being too conspicuous 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, the wearing assistant can easily obtain a sense of security with respect to 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, and more preferably 1.5 mm or more and 5.0 mm or less. The larger the opening is, the better the permeability of the stool is, while the stool after absorption may return from the opening, so that depending on the interval and width of the sheet convex portion, the interval and width of the sheet convex portion may be increased. It is preferable that the size is close (the difference is 2 mm or less). By providing an opening having a size close to the interval and width of the sheet protrusions, it is possible to achieve both a visual image and a functional aspect.

  The second concave portion 522 is arranged continuously from the front edge R1F of the first region R1 to the front edge of the top sheet 50. Since the second concave portion 522 is continuous, the bodily 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 transferred to the absorber 40 over a wide area. .

  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-rear direction L. Since the space in the first concave portion 521 and the space in the second concave portion 522 communicate with each other, the excrement can be smoothly diffused between the first region R1 and the second region R2. For example, even when the mounting position of the absorbent article is shifted and the stool is discharged to the second region R2, the stool can be guided to the first region R1, and the stool can be accommodated and absorbed by the first region R1. it can.

  In the first region R1, the rising angle α of the first convex wall portion 591 (see FIG. 4) is larger than the rising angle β of the second convex wall portion 592 (see FIG. 5). The rising angle α of the first convex wall portion 591 is larger than the rising angle β of the second convex wall portion 592, and the first convex wall portion 591 has a relatively steep inclination. Therefore, it is easy to hold the excrement stored in the first concave portion 521 by the first convex portion 511, and it is possible to suppress the excrement once stored from coming out of the first concave portion 521.

  The rising angle α of the second convex wall portion 592 is smaller than the rising angle β of the first convex wall portion 591, and the second convex wall portion 592 has a relatively gentle inclination. The second region R2 is arranged at least in the crotch region 25. The inseam region 25 is in closer contact with the wearer's skin than the rear waist region 30. Since the convex wall portion of the second region R2 has a gentle slope, even if the crotch region where the second region R2 is located is in close contact with the skin, the contact of the second convex portion 512 with the skin is reduced. Can be.

  The rising angle of the convex wall portion 59 can be measured by the following method. Using a cold spray or the like, the sheet to be measured is taken out of the absorbent article, and the convex portion at the measurement location and its periphery are cut in parallel to the width direction. Cutting is performed by a sharp blade (for example, a blade for replacing a cutter) so that the protrusions are not crushed as much as possible. With the top sheet placed on a horizontal surface so that the cut sheet does not wrinkle, the section is magnified 20 times with a microscope and the cross section is photographed. With respect to the cross section of the photographing, the rising angle of the surface of the convex wall portion on the skin-facing surface side (surface excluding fluffy 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 in the thickness direction of the top sheet than 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 contact of the sheet convex portion 51 with the skin is soft, and the wearer can obtain a fluffy feel. Can be. Further, the body fluid is easily guided in the thickness direction T by 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 absorber side.

  Note that the fiber orientation of the protrusion wall is oriented in the thickness direction, in a state where the sheet protrusion and the sheet recess are formed, the fibers are in the thickness direction (the direction from the skin side to the non-skin side of the sheet). It means that it is oriented in the range of +45 degrees to -45 degrees. The fiber orientation was measured using a digital microscope VHX-100 manufactured by KEYENCE CORPORATION using the following measurement method. (1) The sample is set on the observation table so that the surface of the convex wall portion can be observed. (2) The lens is focused on the fiber closest to the foreground of the sample except for the fiber that has protruded irregularly, and (3) ) Create 3D image of sample on PC screen. Next, (4) convert the 3D image into a 2D image, and (5) draw a plurality of parallel lines on the screen that 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 (7) the fibers oriented in the thickness direction with respect to the total number of fibers in the set range. It can be measured and calculated by calculating the ratio of the number of fibers and the ratio of the number of fibers in the fiber orientation in the direction perpendicular to the thickness direction.

  The bending rigidity of the first region R1 is higher than the bending rigidity of the second region R2. The bending stiffness is measured using KES FB-2 manufactured by Kato Tech Co., Ltd. A test piece having a size of 50 mm × 100 mm is prepared, and one end of the test piece in the longitudinal direction is sandwiched by one of a pair of chucks, and the other end of the test piece in the longitudinal direction is sandwiched by the other chuck. One chuck rotates around the other chuck, and the bending stiffness of the test piece bent by this is measured by a torque detector. Five sets of test pieces are prepared, and the average value of the measured values is defined as the bending rigidity.

  The front edge R1F of the first region R1 is located behind the center in the front-rear direction L of the disposable diaper 10, and is located behind the bending guide portion of the absorber 40. The bending guide part is for guiding bending based on a fold line along the width direction of the absorber 40, and the notch of the absorber 40, an embossed line extending in the width direction W, and arranged along the width direction W. An example of the embossed assembly is a portion provided with a difference in rigidity such that the absorber is bent with the portion as a base point. The bending guide part of the present embodiment is constituted by a pair of first low weight parts 41. The bending guide portion is arranged in a range where the contraction region 84 of the three-dimensional gather is arranged in the front-back direction. The range in which the contraction region 84 is arranged in the front-rear direction L tends to shrink in the front-rear direction L due to the contraction of the contraction region 84. When a contracting force is applied by the contracting region, the absorbent article is deformed based on the bending guide portion. By deforming from the bending guide portion located on the front side of the first region R1 as a base point, the contraction force of the contraction region 84 is absorbed, and the first region R1 is maintained in a flat state and has a function of drawing stool. You can continue to do.

  The first region R1 is arranged between the pair of first fixing portions 81 in the width direction W. The outer edge of the first region R1 is located inside the first fixing portion 81 in the width direction. The rigidity of the top sheet 50 between the first fixing portions 81 in the rear waist region 30 is increased, and the height of the upright portions 83 is easily secured. Therefore, lateral leakage of the stool in the rear waistline region 30 can be prevented. In addition, since the upright portion 83 is easily raised, the top sheet 50 is hardly covered with the three-dimensional gather 80, and the discharged stool is easily guided into the first concave portion 521.

  The rear edge R1R of the first region R1 is located behind the rear edge of the contraction region 84. The first region R1 is disposed across the rear edge of the contraction region 84 in the front-rear direction L. The rigidity in the vicinity of the rear edge of the contraction region, which is the starting point of the three-dimensional gather, increases. By increasing the rigidity of the starting point of the three-dimensional gather, it is easy to secure the height of the three-dimensional gather. More specifically, since the second fixed portion 82 side of the upright portion 83 is close to the rising base point, it is difficult to secure a rising height as compared with the center of the upstanding portion 83 in the front-rear direction. In addition, the region behind the contraction region 84 is not contracted by the side elastic member 71, so that it is difficult to secure the rising height of the standing portion 83. The first region R1 is disposed behind the contracted region 84, and the rigidity of the top sheet 50 on the second fixed portion 82 side in the rear waistline region 30 is increased. By increasing the rigidity of the top sheet 50, the upright portions 83 are easily raised, and the height of the upright portions 83 is easily ensured. Therefore, lateral leakage of the stool in the rear waist area can be prevented. In addition, by ensuring the height of the three-dimensional gathers, it is possible to prevent the top sheet from being covered by the three-dimensional gathers, and to continue to exhibit the function of guiding the discharged stool into the first concave portion 521.

  The rear edge R1R of the first region R1 is located on the front side of the girth holding portion and is separated from the girth holding portion. The waist holding portion is a region between the pair of fastening portions 91. The girth holding portion is a region that is in close contact with the body in the mounted state in which the fastening portion 91 is fastened to the front waist region 20. Since the region between the pair of fastening portions 91 and the first region R1 are separated from each other, it is easy to realize a state in which the stool contained in the first concave portion 521 is 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 separated from the region where the waist elastic portion 85 is arranged. The region where the waist elastic portion 85 is arranged is a region that is in close contact with the body when worn. Since the first region R1 is separated from the region where the waist elastic portion 85 is arranged, it is easy to realize a state in which the stool stored in the first concave portion 521 is separated from the wearer's skin.

(3) Manufacturing Method of Top Sheet Next, an example of a manufacturing method of a nonwoven fabric forming the top sheet will be described. In the production of the nonwoven fabric constituting the topsheet, the convex portions and the concave portions of the sheet can be formed by shaping to stretch the nonwoven fabric. As the shaping, a first shaping and a second shaping can be performed. The first shaping process forms a second convex portion 512, a second concave portion 522, a second bottom portion 532, and a second opening 542 in a region corresponding to the entire region in the width direction of the top sheet 50.

  The second shaping is performed after the first shaping. In the second shaping process, the first convex portion 511 is formed in a region corresponding to the first region R1, and the other regions are not processed. Specifically, in a region corresponding to the first region, a part of the second convex portion 512 is further extended to form the first convex portion 511. Among the second convex portions 512 formed by the first molding process, the second convex portions 512 not subjected to the second molding process constitute the intermediate portion 58. Of the second bottom 532 and the second opening 542 formed by the first shaping process, the second bottom 532 and the second opening 542 corresponding to the first region constitute the first bottom 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.

  When performing the shaping process, a welded portion may be formed at the edge of the opening. 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 increased and the shape of the opening is easily maintained. Therefore, the excrement pull-in property can be maintained.

(4) Other Embodiments Next, an absorbent article according to a modified example will be described. In the following description of the modified example, the same components as those in the above-described embodiment will be denoted by the same reference numerals and will not be described. FIG. 8 is a diagram schematically illustrating the top sheet 50 and the absorber 400 of the absorbent article according to the first modification. The absorber 400 according to the modified example has an absorption protrusion 401 protruding toward the skin facing surface side T1, and an absorption recess 402 provided between the absorption protrusions 401. The absorbing concave portion 402 only needs to be more concave than the absorbing convex portion 401. The basis weight of the absorbing material of the absorbing concave portion 402 may be lower than that of the absorbing convex portion 401, and may be zero.

  The first opening 541 is arranged in a region overlapping with the absorption convex portion 401, and is arranged in a region overlapping with the absorption concave portion 402. Since the absorption convex portion 401 and the first opening 541 overlap, the distance between the first opening 541 and the absorber 40 is short, and the body fluid drawn in through the first opening 541 can be quickly absorbed by the absorber 40. In addition, since the absorption recess 402 and the first opening 541 overlap, a space for accommodating stool can be formed on the non-skin-facing surface side T2 of the first opening 541, and the excrement drawn through the first opening 541 is stored in the space. Can be withdrawn. Note that the first opening 541 may be arranged in a region that does not overlap with the absorption convex portion 401, or may be arranged in a region that does not overlap with the absorption concave portion 402. Further, the second opening 542 may also be arranged in a region overlapping with the absorption convex portion 401 and the absorption concave portion 402.

  FIG. 9 is a cross-sectional view of the top sheet 500 in the absorbent article according to the second modification. The top sheet 500 according to Modification 2 includes a groove wall portion 55 extending from the bottom portion 53 to the non-skin facing surface side T2, and a groove bottom portion 56 located on the non-skin facing surface side T2 than the groove wall portion 55 and extending in the planar direction. And The opening 54 is formed in the groove wall 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 space between the opening 54 and the absorber 40 can temporarily hold the excrement that has passed through the top sheet 50, and can improve the pull-in property.

  FIG. 10 is a cross-sectional view of the top sheet 501 in the absorbent article according to the third modification. In a top sheet 501 according to Modification 3, the first convex portion 511, the intermediate portion 58, and the first concave portion 521 extend in the front-rear direction. A dividing portion 57 is provided between the first convex portions 511 in the width direction W. The dividing portion 57 is configured to divide a space extending in the front-rear direction of the first concave portion 521. The top of the dividing portion 57 is located closer to the non-skin facing surface side T2 than the top of the first convex portion 511, and is located closer to the skin facing surface T1 than the top of the middle portion 58. More specifically, the region of the space extending in the front-rear direction L of the first recess 521 on the skin-facing surface side T1 (region on the skin-facing surface side T1 than the dividing portion 57) is not divided in the front-rear direction L It continues in the direction L. On the other hand, a region (a region where the dividing portion 57 is disposed) of the space extending in the front-rear direction L of the first concave portion 521 on the non-skin facing surface side T2 is divided in the front-rear direction L and discontinuous in the front-rear direction L. is there. The dividing portions 57 are provided at intervals in the front-rear direction L. Therefore, the first concave portion 521 is discontinuous in at least part of the longitudinal direction L. When the stool is discharged onto the first region R1, the stool is stored in the first concave portion 521 between the first convex portions 511. Due to the portion where the first concave portion 521 is discontinuous in the front-rear direction L, it is possible to prevent the stool stored in the first concave portion 521 from diffusing in the front-rear direction L. Further, since the top of the first convex portion 511 is located on the skin facing surface side T1 more than the top of the dividing portion 57, the excrement in the first concave portion 521 is easily diffused along the front-rear direction L and the width direction W Difficult to spread along. Therefore, lateral leakage of the stool can be prevented.

  In the present embodiment, “extend in the front-rear direction” may be a configuration having at least a certain range in the front-rear direction, and may be inclined with respect to the front-rear direction so that an angle with respect to the front-rear direction is less than 45 degrees. While extending in the width direction. In addition, “extend in the width direction” means that it has a configuration having at least a certain range in the width direction, and extends 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. It also includes the configuration.

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

10: Disposable diapers
20: Front waist area
25: Inseam area
30: Rear waist area
40, 400: Absorber
401: Absorption projection
402: Absorption recess
45: Auxiliary sheet
50, 500, 501: Top sheet
51: Sheet convex
511: First convex part
512: Second convex part
52: Seat recess
521: First recess
522: Second recess
53: bottom
54: Opening
541: First opening
542: Second opening
55: Groove wall
56: Groove bottom
57: Dividing part
58: Middle part
59: Convex wall
80: Solid gather
84: Shrinkage area
L: Front-back direction
R1: First area
R2: Second area
T1: Skin facing side
T2: Non-skin facing side
W: width direction

Claims (17)

Front waist area, rear waist area, and crotch area located between the front waist area and the rear waist area,
A width direction orthogonal to the front-rear direction and the front-rear direction toward the rear waist region from the front waist region,
Absorber straddling the crotch region and extending to at least one of the front waist region and the rear waist region,
A top sheet that is located on the skin-facing surface side of the absorber and is in contact with the wearer;
The top sheet is an absorbent article having an opening provided between sheet protrusions protruding toward the skin-facing surface,
The top sheet has at least a first area arranged in the rear waist area and at least a second area arranged in the crotch area,
The shape of the sheet protrusion in the first region and the shape of the sheet protrusion in the second region are different,
The opening is provided at least in the first region ,
A bottom portion extending in the front-rear direction and the width direction and an intermediate portion projecting more toward the skin facing surface than the bottom portion are provided between the sheet convex portions in the first region,
The absorbent article , wherein the top of the intermediate portion is located closer to the non-skin-facing surface than the top of the sheet protrusion in the first region .   Front waist area, rear waist area, and crotch area located between the front waist area and the rear waist area,
  A width direction orthogonal to the front-rear direction and the front-rear direction toward the rear waist region from the front waist region,
  Absorber straddling the crotch region and extending to at least one of the front waist region and the rear waist region,
  A top sheet that is located on the skin-facing surface side of the absorber and is in contact with the wearer;
  The top sheet is an absorbent article having an opening provided between sheet protrusions protruding toward the skin-facing surface,
  The top sheet has at least a first area arranged in the rear waist area and at least a second area arranged in the crotch area,
  The shape of the sheet protrusion in the first region and the shape of the sheet protrusion in the second region are different,
  The opening is provided at least in the first region,
  In the front waist region and the rear waist region, having a waist holding portion extending along the width direction and holding the absorbent article on a wearer's body,
  An absorbent article, wherein a rear edge of the first region is located on a front side of the waistline holding portion. A pair of three-dimensional gathers arranged on both outer sides in the width direction than the center in the width direction of the absorbent article,
Each of the three-dimensional gathers has a contraction region that contracts in the front-rear direction by an elastic member,
The bending rigidity of the first region is higher than the bending rigidity of the second region,
Wherein the first region is in the longitudinal direction are disposed across a rear edge of the contraction region, the absorbent article according to claim 1 or 2. The absorber has a bending guide portion that guides the bending of the absorbent article along the width direction,
4. The absorbent article according to claim 3 , wherein the bending guide portion is provided on a front side of the first region in a range where the contraction region is arranged in the front-rear direction. 5. The absorbent article according to any one of claims 1 to 4 , 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 any one of claims 1 to 5 , wherein a pitch of the sheet protrusions in the first region is longer than a pitch of the sheet protrusions in the second region. The absorbent article according to any one of claims 1 to 6 , wherein a welded portion to which fibers constituting the top sheet are welded is formed at an edge of the opening. The absorber has an absorption concave portion provided between the absorption convex portion and the absorption convex portion projecting toward the skin facing surface side,
The absorbent article according to any one of claims 1 to 7 , wherein the opening of the first region is arranged in a region overlapping with the absorption protrusion. The absorber has an absorption concave portion provided between the absorption convex portion and the absorption convex portion projecting toward the skin facing surface side,
The absorbent article according to any one of claims 1 to 7 , wherein the opening of the first region is arranged in a region overlapping the absorption concave portion. The sheet convex portion has a convex wall portion extending to the skin facing surface side,
The absorbent article according to any one of claims 1 to 9 , wherein a rising angle of the convex wall portion in the first region is larger than a rising angle of the convex wall portion in the second region. The top sheet has fibers,
A space is formed between the sheet convex portion and the absorber,
The absorbent according to claim 10 , wherein the fibers in the convex wall portion have more fibers oriented along the thickness direction of the top sheet than fibers oriented along the front-rear direction and the width direction. Goods. Between the sheet convex portions, has a groove wall portion extending to the non-skin facing surface side,
Said opening is provided in the groove walls, the absorbent article according to any one of claims 1 to claim 11. The absorbent article according to any one of claims 1 to 12 , wherein the sheet convex portions of the first region are arranged in a staggered manner. The sheet convex portion of the first region extends along the front-back direction,
Said between said sheet projecting portion of the first region, the absorption according segmented portion for dividing a space extending in the longitudinal direction between the sheet convex portion is provided, to any one of claims 1 to claim 13 Products. The height of the sheet convex portion is 0.3 mm or more and 10.0 mm or less,
The absorbent article according to any one of claims 1 to 14 , wherein the pitch of the sheet protrusions is 0.3 mm or more and 10.0 mm or less. The outer edge of the top sheet is located on the inner side in the width direction than the outer edge of the absorber,
On the outer side in the width direction than the outer edge of the absorber, an auxiliary sheet positioned closer to the skin-facing surface than the absorber is provided.
The auxiliary sheet and the top sheet are configured by a nonwoven fabric,
The absorbent article according to any one of claims 1 to 15 , wherein the inter-fiber distance of the auxiliary sheet is longer than the inter-fiber distance of the top sheet. A pair of three-dimensional gathers arranged on both outer sides in the width direction than the center in the width direction of the absorbent article,
The absorbent according to any one of claims 1 to 16 , wherein the outer edge of the top sheet is located outside the inner edge of the three-dimensional gather in the width direction when the absorbent article is extended. Goods.

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