KR20190073449A - Absorbent article - Google Patents

Abstract

The present invention provides an absorbent article which is easy to recognize the pulling-in property of the region where the sides are discharged, and can provide a sense of security in use. The absorbent article includes an absorbent body (40) and a top sheet (50) located on the skin facing side of the absorbent body and in contact with the wearer. The top sheet has a sheet convex portion 51 protruding toward the skin-facing surface side and an opening 54 formed between the sheet convex portions. The topsheet has a first region (R1) arranged at least in the rear waist region and a second region (R2) arranged at least in the crotch region. The shape of the convex portion of the seat of the first region is different from the shape of the convex portion of the seat of the second region. The opening is formed at least in the first region.

Description

Absorbent article

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

Conventionally, in an absorbent article for absorbing urine and feces of a wearer, there is provided an absorbent article in which an opening (a liquid recess) for introducing excreta is formed on a topsheet (see, for example, Patent Document 1) . In the top sheet of Patent Document 1, there are formed a plurality of convex portions protruding toward the skin-facing surface side and an opening disposed between the convex portions and penetrating in the thickness direction of the top sheet.

Patent Document 1: JP-A-2009-89965

The convex portion and the opening of the top sheet of Patent Document 1 are regularly arranged in the same arrangement throughout the top sheet at regular intervals in the front-back direction and the width direction. Therefore, a mounting assistant such as a mother or the like may recognize the convex portion and the opening as shapes, and may not be able to recognize the presence of the opening for introducing the excrement. The attaching assistant could not grasp the entrained property of the body fluid of the topsheet and could not use the absorbent article safely in some cases. As a result of conducting various investigations by the applicant, it was found that the installation assistant is able to grasp the pulling-in property of the area to be discharged, so that it is easy to obtain a sense of security at the time of use.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an absorbent article in which a mounting assistant can easily recognize the pulling-in of a region where a side is discharged, and can obtain a relief in use.

The absorbent article (disposable diaper 10) according to the present disclosure has a front waist region (front waist region 20), a rear waist region (rear waist region 30), and a front waist region A crotch region (crotch region 25) positioned between the rear waist regions and a front waist region extending from the front waist region to the back waist region (forward and backward directions L) (Absorbent body (40)) extending in at least one of the front waist region and the rear waist region over the crotch region and the absorbent core (Top sheet 50) that is in contact with the wearer, and the top sheet has a sheet convex portion (sheet convex portion 51) protruding toward the skin-facing surface side, and an opening (Opening 54) . The top sheet has a first region (first region (R1) arranged at least in the rear waist region and a second region (second region (R2)) arranged at least in the crotch region, The shape of the convex portion of the sheet is different from the shape of the convex portion of the second region, and the opening is formed at least in the first region.

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

At least the following matters will become apparent from the description of this specification and the accompanying drawings.

A front waist region, a rear waist region, and a crotch region located between the front waist region and the rear waist region,

A front-rear direction from the front waist region to the rear waist region, a width direction orthogonal to the front-

An absorbent body extending over the crotch region and extending to at least one of the front waist region and the rear waist region,

And a top sheet that is located on the skin-facing side of the absorbent body and is in contact with the wearer,

Wherein the top sheet has an opening formed between the convex portions of the sheet projecting toward the skin-facing surface side,

Wherein the top sheet has a first region arranged at least in the rear waist region and a second region arranged at least in the crotch region,

The shape of the seat convex portion of the first region is different from the shape of the seat convex portion of the second region,

And the opening is formed at least in the first region.

According to this absorbent article, the first region is disposed at least in the rear waist region, and includes the region where the side is discharged. The second region includes at least a region disposed in the crotch region and discharging urine. Since the shape of the seat convex portion of the first region and the shape of the seat convex portion of the second region are different from each other, the mounting assistant can easily recognize the first region. Further, since the shape of the convex portion of the seat belt in the first region is different from the shape of the convex portion of the seat belt in the second region, the performance of the top sheet disposed in the crotch region and the performance of the top sheet disposed in the rear waist region , And it is possible to obtain a sense of assurance that the urine and the diaphragm are properly absorbed.

When the edge is discharged on the first area, the edge is received in the space between the sheet convex portions, and moves to the skin non-facing surface side through the opening between the sheet convex portions. In addition, since the side is sandwiched by the wall formed by the convex portion of the seat, it is possible to restrain the side from the convex portion between the convex portions of the seat and reattached to the wearer once the side accommodated between the convex portions of the seat touches the skin .

As such an absorbent article,

And a pair of steric gathers disposed on both outer sides in the width direction than the center in the width direction of the absorbent article,

Wherein each of the three-dimensional gathers has a shrinkage region which contracts in the anteroposterior direction by an elastic member,

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

And the first region is disposed across the trailing edge of the shrinkage region in the front-rear direction.

The rigidity of the vicinity of the trailing edge of the shrinkage region, which is the rising point of the solid gathers, is increased because the first region covers the trailing edge of the shrinkage region in the front-rear direction. By increasing the rigidity of the rising point of the three-dimensional gathers, it is easy to secure the height of the three-dimensional gathers. Therefore, lateral leakage of the side in the rear waist region can be prevented. Further, by securing the height of the three-dimensional gathers, it is possible to keep the function of preventing the top sheet from being covered by the three-dimensional gathers and guiding the discharged sides between the first region sheet convex portions.

As such an absorbent article,

The absorbent body has a bending guide portion that follows the width direction and induces bending of the absorbent article,

It is preferable that the bending guide portion is formed on the front side of the first region in a range in which the shrinkage region is arranged in the front-rear direction.

The range in which the shrinking region is arranged in the forward and backward directions is contracted in the forward and backward directions due to the shrinkage of the shrinking region. When a force of contraction is applied by the contraction region, the absorbent article is deformed from the bending guide portion as a starting point. The shrinkage force of the shrinking region is absorbed by deforming the bending guide portion located at the front side of the first region from the starting point, and the function of keeping the first region flat and pulling the side can be continued.

As such an absorbent article,

It is preferable that a height of the seat convex portion of the first region is higher than a height of the seat convex portion of the second region.

The height of the convex portion of the seat in the first region is higher than the height of the convex portion of the seat in the second region, so that the wall formed by the convex portion of the seat sandwiching the sides can be formed relatively high. Since the wall formed by the convex portion of the seat sandwiching the sides is high, once the sides accommodated between the convex portions of the seat are sandwiched by the wall, the side can be easily held. As a result, when the skin of the wearer touches the surface of the accommodated side, it is possible to keep the sides so as to prevent the sides from reattaching to the wearer.

Further, since the height of the convex portion of the seat in the first region is relatively high, the gap between the skin and the absorbent in the first region becomes large. The air permeability is increased and the air inside the absorbent article is liable to be leaked to the outside, thereby suppressing erosion. In the state in which the body pressure is applied to the first region and the convexity of the sheet is crushed before the sides are accommodated between the convex portions of the first region and the state in which the convex portion of the seat is standing up because the body pressure is not applied to the first region, The thickness of the film is changed. Since the height of the convex portion of the seat 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 the body pressure is increased, and the air is more easily flowed. On the other hand, since the height of the seat convex portion of the second region is relatively low, the accommodating space between the seat convex portions is reduced, and it is possible to suppress the flow of the sides accommodated in the first region to the second region. In addition, a large number of sides can be accommodated between the convex portions of the first region, and it becomes easy for the transition to pass through the opening due to its own weight, and the amount of the side guided to the absorber through the opening can be increased.

As such an absorbent article,

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

The space between the convex portions of the sheet in the first region is widened because the pitch of the convex portions of the first region is longer than the pitch of the convex portions of the second region. Therefore, the sides discharged on the top sheet are received between the sheet convex portions, and are hard to remain on the convex portions of the sheet. It is possible to suppress the continuation of contact with the skin of the wearer and to improve the feeling of wearing. Further, many sides can be maintained between the convex portions of the seat in the first region, and the weight of the sides is increased. In the topsheet having fibers, the self-weight of the sides increases, so that the moisture contained in the sides is easily transmitted to the absorbent body through the gaps between the fibers. Therefore, it is possible to quickly transfer the water in the sides to the absorber, and to prevent the skin from adhering to the skin, which contains a lot of moisture.

As such an absorbent article,

It is preferable that a welded portion in which the fibers constituting the topsheet are welded is formed at the edge of the opening.

Since the welded portion is formed at the edge of the opening, the strength of the opening increases and the opening shape can be easily maintained. Therefore, the entrapment of the excrement can be maintained.

As such an absorbent article,

Wherein the absorbent body has an absorbent convex portion projecting toward the skin-facing surface side and an absorbent concave portion formed between the absorbent convex portion,

And the opening of the first region is preferably disposed in a region overlapping with the absorption convex portion.

In the region where the absorbing convex portion and the opening overlap, the distance between the opening and the absorbing body is short, and the body fluid drawn through the opening can be quickly absorbed by the absorbing body. Therefore, the entrapment of the excrement can be improved.

As such an absorbent article,

Wherein the absorbent body has an absorbent convex portion projecting toward the skin-facing surface side and an absorbent concave portion formed between the absorbent convex portion,

The opening of the first region is preferably disposed in a region overlapping with the absorption concavity.

In the region where the absorbing concave portion and the opening overlap each other, a space for accommodating the side can be formed on the skin non-facing surface side of the opening, and the excrement introduced through the opening can be drawn into the space. Therefore, the entrapment of the excrement can be improved.

As such an absorbent article,

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

The elevation angle of the convex wall portion of the first region is preferably larger than the elevation angle of the convex wall portion of the second region.

The elevation angle of the convex wall portion of the first region is larger than the elevation angle of the convex wall portion of the second region and the convex wall portion of the first region becomes a relatively steep inclination. Therefore, it is possible to prevent the excrement contained in the first convex portion of the first region from intervening between the convex portions of the sheet. The rising angle of the convex wall portion of the second region is smaller than the rising angle of the convex wall portion of the first region and the convex wall portion of the second region is a relatively gentle slope. The second region is disposed at least in the crotch region. The crotch region is in close contact with the wearer's skin as compared with the rear waist region. The convex wall portion of the second region has a gentle inclination, so that even when the second region is brought into close contact with the skin, the contact with the skin due to the convexity of the sheet can be smooth.

As such an absorbent article,

The topsheet has fibers,

A space is formed between the convex portion of the seat and the absorbent body,

The fibers in the convex wall portion preferably have a greater number of fibers oriented along the thickness direction of the topsheet than the fibers oriented in the front-back direction and the width direction.

The convexity of the seat convex portion is hardly crushed, the space on the skin non-facing surface side of the convex portion of the seat is maintained, the contact with the skin is smooth, and the wearer can obtain a fluffy texture. Further, since the fibers of the convex wall portion include many fibers oriented in the thickness direction, the body fluid can be easily guided in the thickness direction by the convex wall portions. Therefore, even when the height of the seat convex portion is made high, the body fluid in the convex wall portion can be quickly guided toward the absorber side.

As such an absorbent article,

A bottom portion extending in the front and rear direction and the width direction and an intermediate portion protruding toward the skin facing surface side than the bottom portion are formed between the seat convex portions of the first region,

The top of the intermediate portion is preferably located on the skin non-facing surface side with respect to the top portion of the convex portion of the seat in the first region.

Since the intermediate portion is formed between the sheet convex portions of the first region, the excretion in the space between the sheet convex portions becomes difficult to diffuse in the planar direction including the front-back direction and the width direction. Therefore, it is possible to promptly guide the sides to the absorbent body side, and to prevent the areas where the mutations are attached to the skin from being increased.

As such an absorbent article,

A waist-surrounding holding portion extending along the width direction and holding the absorbent article on the wearer's body in the front waist region and the rear waist region,

The rear end edge of the first region is preferably located forward of the waist-surrounding holding portion.

The waist-surrounding holding portion is a region for holding the absorbent article on the body and is likely to come into close contact with the body. Since the first region and the waist-surrounding holding portion are spaced apart from each other, the mutual accommodation between the seat convex portions of the first region can be easily kept away from the wearer's skin. Further, when 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 is hardly brought into close contact with the skin, thereby suppressing the uncomfortable feeling of the crotch region by the convexity of the seat of the second region can do.

As such an absorbent article,

And between the seat convex portions, a groove wall portion extending toward the skin non-facing surface side,

It is preferable that the opening is formed in the groove wall portion.

Since the opening is formed in the groove wall portion extending toward the skin non-facing surface side, a space is likely to be formed between the absorbing body disposed on the skin non-facing surface side of the top sheet and the opening. By forming a space between the opening and the absorbent body, excretion that has passed through the topsheet can be temporarily held, and entrapment can be improved.

As such an absorbent article,

It is preferable that the seat convex portions of the first region are arranged in a zigzag pattern.

The space between the sheet convex portions is continuous in the front-rear direction or continuous in the width direction, so that diffusion of sides in the planar direction can be suppressed.

As such an absorbent article,

Wherein the seat convex portion of the first region follows the front-rear direction,

And between the seat convex portions of the first region, a divided portion for dividing the space extending in the front-rear direction between the seat convex portions is preferably formed.

Since the divided portions for dividing the space extending in the forward and backward directions are formed, it is possible to suppress the diffusion of the sides accommodated in the seat recesses in the forward and backward directions.

As such an absorbent article,

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

The pitch of the convex portions of the sheet is preferably 0.3 mm or more and 10.0 mm or less.

According to the seat convex portion configured as described above, it is possible to suppress the discomfort of the appearance due to the excessive convexity of the seat, and it is easy for the mounting assistant to obtain relief. In addition, since the convex portion of the sheet can be recognized with the naked eye, a relief against the absorption performance by the convex portion of the sheet can be easily obtained.

As such an absorbent article,

The outer edge of the top sheet is located inside the width direction of the outer edge of the absorbent body,

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

Wherein the auxiliary sheet and the top sheet are constituted by a nonwoven fabric,

The inter-fiber distance of the auxiliary sheet is preferably longer than the inter-fiber distance of the top sheet.

Since the inter-fiber distance of the auxiliary sheet is relatively long, it is easy to draw the body fluid by the auxiliary sheet. Since the auxiliary sheet having higher penetrability is arranged on the outer side in the width direction than the outer edge of the top sheet, the excretion diffused outward in the width direction beyond the top sheet can be drawn into the absorber by the auxiliary sheet, Can be further suppressed.

As such an absorbent article,

And a pair of steric gathers disposed on both outer sides in the width direction than the center in the width direction of the absorbent article,

In the state that the absorbent article is stretched, the outer edge of the top sheet is preferably located outside the inner edge of the three-dimensional gathers in the width direction.

Since the outer edge of the top sheet is located on the outer side in the width direction with respect to the inner edge of the three-dimensional gathers in the state in which the absorbent article is stretched, in the state before use of the absorbent article, . The attachment aide obtains a sense of security against the absorbing performance by viewing the convex portion of the seat top and the opening of the top sheet, feels a wider arrangement region of the top sheet, and more relief can be obtained.

=== Regarding 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. On the other hand, the absorbent article according to the present invention is not limited to the disposable diaper but includes an absorbent pad attached to the undergarment or the diaper. In the following description of the drawings, the same or similar components are denoted by the same or similar reference numerals. It should be noted, however, that the drawings are schematic and that the proportions of the dimensions and the like are different from those of the real world. Therefore, specific dimensions and the like should be judged based on the following description. In addition, the drawings may also include mutually different portions or portions having different ratios.

(1) Overall outline configuration of disposable diaper

1 is an exploded plan view of the disposable diaper 10 according to the present embodiment. 1 is a developed plan view showing a state in which a wrinkle such as the topsheet 50, the side sheet 70, etc. constituting the disposable diaper is not formed, a stretched state in which a stretchable portion such as a three- Fig. 2 is a sectional view taken along the line A-A shown in Fig.

The 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 front waist region (abdomen portion) of the wearer. The rear waist region 30 is a portion in contact with the rear waist region (abdomen portion) of the wearer. The crotch region 25 is located between the front waist region 20 and the rear waist region 30. In the present embodiment, the direction from the front waist region 20 to the rear waist region 30 is referred to as a back-and-forth direction L, and the direction orthogonal to the back and forth direction L is referred to as a width direction W , And a direction extending to the skin-facing side T1 of the wearer and the skin-facing side T2 is referred to as the thickness direction T. [

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

A first low unit weight portion 41 is formed in the crotch region 25 of the absorbent core 40 so as to extend from the outer edge of the absorbent core 40a toward the inner side in the width direction W . The first low-unit weight portion 41 is disposed at both outer edges of the absorbent core 40a and is spaced apart in the back-and-forth direction L. As shown in Fig. The rear waist region 30 of the absorbent core 40a is formed with a second low unit weight portion 42 extending forward from the rear end edge of the absorbent core 40a. The length of the second low unit weight portion 42 in the width direction is shortened toward the front side. The first low-unit weight portion 41 and the second low-basis weight portion 42 are portions where the unit weight of the absorbent material is lower than that of the surrounding absorbent core. The first low-unit weight portion 41 and the second low-unit weight portion 42 of the present embodiment are notched. On the other hand, the first low-unit weight portion 41 and the second low-unit weight portion 42 may not be formed.

A liquid permeable top sheet (50) is provided on the skin-facing side (T1) of the absorbent body (40). The topsheet (50) constitutes the skin-contacting surface of the disposable diaper (10) and contacts the wearer. The topsheet 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, it can be composed of a nonwoven fabric. The outer edge of the topsheet 50 is positioned inward in the width direction with respect to the outer edge of the absorber 40. The top sheet 50 will be described later in detail.

An auxiliary sheet 45 is provided between the topsheet 50 and the absorbent body 40 (see Fig. 2). The outer edge of the auxiliary sheet 45 is located outside the widthwise direction W of the top sheet 50 than the outer edge thereof. The auxiliary sheet covers the skin-facing side of the absorbent body 40 in the area 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 topsheet 50. Since the inter-fiber distance of the auxiliary sheet is relatively long, it is easy to draw the body fluid by the auxiliary sheet. Since the auxiliary sheet having higher penetrability is arranged on the outer side in the width direction than the outer edge of the top sheet, the side diffused outward in the width direction beyond the top sheet can be led to the absorbent side by the auxiliary sheet, Leakage can be suppressed. On the other hand, the auxiliary sheet may not be provided. In the form having no auxiliary sheet, the top sheet is provided so as to cover the outer edge of the absorbent body.

The interfiber distance can be measured using a mercury porosimeter (manufactured by Shimadzu Seisakusho Co., Ltd.) according to the mercury intrusion method (JIS R 1655). This mercury infusion method is a method in which the mercury is pressurized by the pressure applied to the mercury when the mercury is pressed between the constituent fibers of the fiber structure (the top sheet and the auxiliary sheet) to be measured and the volume of mercury injected into the space between the constituent fibers of the fiber structure Information on the structure of the fiber structure can be obtained.

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

1) A fiber sample to be measured is cut into 24 mm 15 mm to prepare a sample for measurement. Three samples of this measurement sample are produced.

2) The three measurement samples were set in a sample cell of a mercury porosimeter (manufactured by Shimadzu Seisakusho Co., Ltd.) so as not to overlap with each other, and the pressure to be applied to the mercury was gradually changed, (That is, the pore volume) of the pressurized mercury in the space (that is, the pore) between the electrodes. On the other hand, the measurement is performed under the environment of 22 deg. C and 65% RH.

3) The pore diameter D (μm) of the pores (that is, the inter-fiber distance (탆) of the fiber structure) is calculated according to the following formula (1), and the relationship between the pore diameter D and the pore volume Is obtained as a distribution curve of the diameter D (differential integral curve). On the other hand, 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 deg., And the mercury pressure is 0-414 MPa (absolute pressure).

Equation (1) D = -4? Cos? / P

(Where D is the pore diameter (inter-fiber distance),? Is the surface tension of mercury,? Is the contact angle, and P is the pressure.)

A liquid-impermeable back sheet 60a is provided on the skin-facing surface side T2 of the absorbent body 40. [ On the skin non-facing surface side of the back sheet, an external sheet 60 is provided.

A pair of solid gathers 80 are disposed on both outer sides in the width direction of the disposable diaper 10 from the center in the width direction thereof. The three-dimensional gathers 80 are standers capable of standing on the wearer's side. The three-dimensional gatherer 80 is 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 sheet 70, a side elastic member 71 that extends and retracts in the forward and backward directions L is disposed. The pair of steric gathers 80 are substantially line-symmetrical about the center in the width direction of the disposable diaper as symmetrical axes. Each of the three-dimensional gatherers 80 includes a standing elastic member 71 having a side elastic member 71 extending and retracting in the front-rear direction and having an erecting portion 83 standing upright to the wearer's side and an erecting portion 83 located outside the erecting portion 83 in the width direction, 83 which are located on both outer sides of the rising section 83 in the forward and backward directions L and which are the starting points of the rise of the rising section 83, 2 fixing portion 82. [ The front end edge of the rising portion 83 coincides with the rear end edge of the second fixing portion 82 disposed in the front waist region 20 and the rear end edge of the rising portion 83 coincides with the rear waist region 30 Of the first fixing portion 81 disposed on the front side of the first fixing portion 81.

The side sheet 70 covers the outer edge of the top sheet 50 and the outer edge of the auxiliary sheet 45. [ The inner edge (the inner edge of the side sheet 70) of the three-dimensional gathers is located inward in the width direction than the outer edge of the top sheet in a state in which the absorbent article is stretched. Since the outer edge of the top sheet is located on the outer side in the width direction with respect to the inner edge of the three-dimensional gathers in the state in which the absorbent article is stretched, in the state before use of the absorbent article, . The attachment aide obtains a sense of security against the absorbing performance by viewing the topsheet, feels a wider arrangement area of the topsheet, and more relief can be obtained.

The side sheet 70 is bonded on the top sheet 50 or the auxiliary sheet 45 in the first fixing portion 81 and the second fixing portion 82. The rising portions 83 are formed between the second fixing portions 82 in the forward and backward directions L and can be lifted from the top sheet 50 or the like because they are not joined to the top sheet 50 . The standing portion 83 stands up to the wearer in a state in which the side elastic member is contracted. The standing portion 83 stands up to the wearer in a state in which the disposable diaper is worn. The standing portion 83 has a shrinkage region 84 in which the side elastic members 71 are arranged to shrink. The shrinking region 84 is a region where the side elastic members 71 are stretched in a stretched state in which the disposable diaper is stretched. The shrinking region 84 is formed by excluding the region where the side elastic members 71 in the non-stretched state are joined except for the region where the side elastic members 71 are not disposed in the rising portions 83, And a region in which the elastic member 71 is not bonded to the side sheet 70 is excluded. The three-dimensional gatherer 80 forms a wall that rises to the skin-facing side T1 at the outer edge of the absorber 40, thereby preventing lateral leakage of the excreta.

Around the outer edge of the disposable diaper 10, a leg-hole opening portion 13 disposed around the wearer's legs is formed. The disposable diaper 10 is provided with a pair of leg stretchable and contractible portions 75 which are disposed inside the leg-openings 13 in the width direction and extend and contracted in the longitudinal direction L. [ The leg stretchable and contractible portion 75 is disposed on the inner side in the width direction than the left and right leg-hole openings 13, respectively.

The fastening tapes 90 are a pair and extend outward in the width direction W from the side sheet 70 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 for fixing to the target portion 95 of the front waist region 20. The fixing portion 91 is, for example, a portion provided with a coupling hook. The fastening tape 90 is fixed to the target portion 95 of the front waist region 20 to thereby hold the disposable diaper 10 on the wearer's body. The region between the fastening portions 91 of the pair of fastening tapes is an area held by the body at the time of mounting, and constitutes the waist holding portion.

The target portion 95 is provided on the surface of the skin sheet non-facing surface side T2 of the outer sheet 60 of the front waist region 20. The target portion 95 is configured to catch the coupling hook of the fastening tape 90 and functions as a loop of the hook and loop engagement 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, a region between the side joint portions joining the front waist region and the rear waist region forms the waist-surrounding holding portion.

The disposable diaper 10 has a waist stretchable portion 85 which is stretchable in the width direction. The waist stretchable and contractible portion 85 is disposed in the rear waist region 30. The waist stretchable and contractible 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 formed.

(2) Construction of the top sheet

Next, the configuration of the topsheet 50 will be described in detail. 3 is an enlarged plan view of the topsheet. The top sheet 50 has a sheet convex portion 51 projecting toward the skin facing surface T1 and a sheet concave portion 52 formed between the sheet convex portion 51. [ On the other hand, in Fig. 1 and Fig. 2, the sheet convex portion 51 and the sheet concave portion 52 are omitted. The sheet convex portion 51 protrudes toward the skin-facing side T1 of the disposable diaper 10 and the sheet concave portion 52 is a space between the sheet convex portions 51. [ The seat convex portion 51 is conical in shape and tapered toward the end toward the skin-facing side T1. The top portion of the seat convex portion 51 has a rounded shape. The seat convex portions 51 are arranged at intervals in the front-rear direction L and the widthwise direction W, and are arranged in a staggered shape in plan view. The zigzag shape here is not arranged in the front-rear direction L and the width direction W, but is arranged to be shifted in at least one of the forward-backward direction L and the widthwise direction W. The seat 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 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 sheet concave portion 52 on the side of the skin non-opposing face T2 is the bottom portion 53 and the skin facing surface of the sheet concave portion 52 is a virtual plane connecting the peak portions of the convex wall portion 59 to be. 4 and 5, the region of the sheet recess 52 is indicated by an oblique line.

The bottom portion 53 extends in the front-rear direction L and the widthwise direction W. Between the seat convex portions 51, an opening 54 is formed. The opening 54 penetrates the bottom portion 53 in the thickness direction. The seat convex portion 51, the seat recess 52, the bottom portion 53, and the opening 54 are formed over the entire surface of the topsheet 50. The seat convex portion 51, the seat recess 52, the bottom portion 53 and the opening 54 may be formed only on a part of the topsheet 50. [

The topsheet 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, mainly the debris is discharged on the first region R1. The side is accommodated in the seat recess 52 between the seat convex portions 51. In this case, The second region R2 is located in front 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 absorbent body 40 while being diffused in the forward and backward directions L and the widthwise directions W by the seat recesses 52. [ The second region R2 of the top sheet 50 may be arranged in a region other than the first region R1 of the top sheet 50. The second region R2 may be disposed at least in front of the first region R1, And the first region R1 is surrounded by the second region R2 in plan view.

Fig. 4 and Fig. 6 schematically show the top sheet 50 of the first region R1. 5 and 7 are diagrams schematically showing the topsheet 50 of the second region R2. The sheet convex portion 51 is formed by the first convex portion 511 which is the convex portion 51 of the first region R1 and the second convex portion 511 which is the convex portion 51 of the second region R2 512). The sheet recess 52 is formed by a first concave portion 521 which is a sheet concave portion 52 of the first region R1 and a second concave portion 521 which is a sheet concave portion 52 of the second region R2 522). The bottom portion 53 is formed by the first bottom portion 531 which is the bottom portion 53 of the first region R1 and the second bottom portion 532 which is the bottom portion 53 of the second region R2 . The opening 54 has a first opening 541 which is an opening 54 in the first region R1 and a second opening 542 which is an opening 54 in the second region R2. The opening 54 may be formed at least in the first 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 configuration in which the sheet convex portions 51 are different in shape means the length in the width direction of the sheet convex portion 51, the length in the front-back direction L of the sheet convex portion 51, At least a part of the shape (circle, rectangle, etc.) seen from the plane of the sheet convex portion 51 is different. The top sheet 50 of the present embodiment is different from the top sheet 50 of the first embodiment in that the height 511H of the first convex portion 511 is different from the height 512H of the second convex portion 512 and the pitch 511H of the first convex portion 511 P1 and the pitch P2 of the second convex portion 512 are different from each other. The shape of the first convex portion 511 differs from the shape of the second convex portion 512 so that the mounting assistant can easily recognize the first region R1. Since the shape of the first convex portion 511 and the shape of the second convex portion 512 are different from each other, the mounting aids are different in performance between the topsheet disposed in the crotch region and the performance of the topsheet disposed in the rear waist region, And it is possible to obtain a sense of assurance that the urine and the stool are properly absorbed.

The shape of the first concave portion 521 and the shape of the second concave portion 522 may be different from each other. The configuration in which the seat recesses 52 are different from each other is a configuration in which the length of the seat recess 52 in the width direction W, the length of the seat recess 52 in the forward and backward directions L, At least a part of the shape of the formed opening 54 and the position of the opening 54 are different.

The topsheet 50 of the first region R1 is provided with a first convex portion 511, a first concave portion 521, an intermediate portion 58, a first bottom portion 531, 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 intermediate portion 58 protrudes from the first bottom portion 531 toward the skin facing surface T1. The top of the intermediate portion 58 is located on the skin non-opposed surface side T2 than the top portion of the first convex portion 511. [ Around the intermediate portion 58, a first bottom portion 531 is disposed. The first convex portion 511, the first concave portion 521, the first convex portion 511, and the second concave portion 511 are formed in the top sheet 50 in the cross section (the cross section shown in FIG. 4) The first bottom portion 531, the first bottom portion 531, the middle portion 531, the first bottom portion 531, the second bottom portion 531, The first bottom portion 531, the first opening 541, and the first bottom portion 531, in that order from the bottom. On the other hand, the intermediate portion 58 may not be formed, and instead of the intermediate portion 58, the first convex portion 511 may be formed.

A second convex portion 512 and a second concave portion 522 are formed on the top sheet 50 of the second region R2. No intermediate portion is formed on the top sheet 50 of the second region R2. The second convex portions 512 are arranged in a staggered manner. The second concave portion 522 and the second convex portion 512 are formed on the top sheet 50 in the cross section of the second region R2 The second bottom portion 532, the second opening 542, and the second bottom portion 532 are arranged in this order in the order of the first recess portion 522, the second recess portion 522, Respectively.

A space is formed between the topsheet 50 and the absorbent body 40 because a plurality of the sheet recesses 52 and the sheet convexities 51 are formed in the topsheet 50. [ A space is formed between the topsheet 50 and the absorbent body 40 so that the body fluid drawn by the topsheet 50 can be drawn into the space and the body fluid can be quickly absorbed by the absorbent body, It is possible to inhibit the body fluid from remaining on the skin.

In the topsheet 50 constructed as described above, when the sides are discharged on the first region R 1, the sides are accommodated in the first recesses 521 between the first projections 511. The sides are sandwiched by the first convex portions 511 and stay in the first concave portions 521. [ By accommodating the sides in the first recess 521, the contact area between the wearer and the sides is reduced. Since the sides are sandwiched by the walls of the first convex portions 511, when the mutually accommodated one of the first convex portions 511 comes into contact with the skin, It is possible to suppress adhesion. Therefore, it is possible to suppress the increase in the area attached to the mutated skin. The provision of the intermediate portion 58 between the first convex portions 511 makes it difficult for the excrement in the space between the first convex portions 511 to diffuse in the forward and backward directions L and the width directions W . The first convex portions 511 are arranged in a staggered manner and the first concave portions 521 are divided in the front and rear direction L and the width direction W. [ Therefore, the side accommodated in the first concave portion 521 is difficult to diffuse along the front-back direction L and the width direction W. [ The fluff feces containing a large amount of water shifts to the absorber 40 through the first opening 541 of the first recess 521.

When the urine is discharged onto the second region R2 of the top sheet 50 thus configured, the urine is supplied to the back side of the second region R2 through the second concave portion 522 between the second convex portions 512, , And is inclined with respect to the width direction (W). The urine flows into the absorber 40 through the second opening 542 formed in the second bottom portion 532 while being highly fluid and diffusing in the planar direction along the second bottom portion 532. As described above, the urine is diffused in the second region R2, the urine is quickly transferred to the absorbent body, and the stool and body fluids are transferred to the absorbent body 40 in the first region R1, It is possible to suppress the attachment of body fluid or loose feces to the skin of the wearer and to improve the feeling of wearing. The first region R1 and the second region R2 of the topsheet can appropriately absorb the urine and the sides having different properties.

The height of the topsheet 50 in the first region R1 from the first bottom 531 to the top of the first convex portion 511 and the height 511H of the first convex portion 511 ) R1H is a length of the topsheet 50 in the second region R2 from the second bottom 532 to the top of the second convex portion 512, (Corresponding to the height 512H of the two convex portions 512). The height of the topsheet 50 in the first region R1 is relatively high so that the skin of the wearer can be separated from the absorbent body 40 in the first region R1, The absorbed body fluid becomes difficult to return to the skin side, and the skin of the wearer can be easily maintained in a dry state.

The height 511H of the first convex portion 511 (the length from the first bottom 531 to the top of the first convex portion 511) is the height of the second convex portion 512 (The length from the second convex portion 532 to the top of the second convex portion 512) 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 of the first convex portion 511 can be formed relatively high. The side wall of the first concave portion 521 can be easily held by the first convex portion 511 because the wall sandwiching the sides is high. As a result, when the wearer's skin touches the surface of the side accommodated in the first concave portion 521, the side is continuously held in the first concave portion 521, Can be prevented from being adhered.

Further, since the height of the first convex portion 511 is relatively high, the gap between the skin and the absorbent body 40 in the first region R1 becomes large. The air permeability is increased, and the air in the diaper flows out to the outside of the diaper, and the erosion can be suppressed. It is also preferable that a state in which the body pressure is applied to the first region R1 so that the first convex portion 511 is crushed and the state in which the body pressure is applied to the first region Rl before the side between the first convex portions 511 is accommodated The thickness of the top sheet 50 changes in a state in which the first convex portion 511 stands up. Since the height of the first convex portion 511 is relatively high, the thickness difference of the topsheet 50 due to the presence or absence of the body pressure is increased, and the air is more easily flowed, and the effect of suppressing the ridging is easily obtained. In addition, a large number of sides can be accommodated between the first convex portions 511, and the self-weight facilitates the passage of the transition through the opening 54, and the amount of the side guided to the absorber 40 through the opening 54 is 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 crotch region 25 is in contact with the excretion of the wearer. The crotch region 25 is in close contact with the skin of the wearer as compared with the rear waist region 30. The height 512H of the second convex portion 512 of the second region R2 contacting the crotch region 25 is suppressed so that even when the crotch region where the second region R2 is placed is brought into close contact with the skin The contact with the skin by the second convex portion 512 can be made smooth. The feel is improved, and the feeling of wearing of the wearer is improved. The area of the second region R2 may be wider than the area of the first region R1 from the viewpoint of improving such mounting feeling. By providing a larger area of the second area R2 suitable for the touch, it is possible to further improve the mounting feeling. Since the height of the second convex portion 512 is relatively low, the accommodating space of the second concave portion 522 is reduced, and the flow of the side wall of the first region R1 into the second region R2 is suppressed .

The pitch P1 of the first convex portions 511 is longer than the pitch P2 of the second convex portions 512. [ The space between the first convex portions 511 is widened, and the accommodating space of the sides can be formed wider. Therefore, the sides discharged onto the topsheet 50 are accommodated between the first convex portions 511 and become difficult to remain on the first convex portions 511. [ It is possible to suppress the continuation of contact with the skin of the wearer and to improve the feeling of wearing. In addition, many sides can be maintained between the first convex portions 511, and the weight of the sides is increased. In the topsheet having fibers, the self-weight of the sides increases, so that the moisture contained in the sides is easily transmitted to the absorbent body through the gaps between the fibers. Therefore, it is possible to quickly transfer the water in the sides to the absorber, and to prevent the skin from adhering to the skin, which contains a lot of moisture. In addition, the second region mainly absorbing urine can be made to have a smooth touch, and the first region that absorbs mainly the side can be made to have a thickness such as to ensure absorption. By forming a portion having a different tactile sensation in a single top sheet of the disposable diaper, the wearer can perceive a smooth function for the skin and a function for reliably absorbing the side.

On the other hand, the pitch of the first convex portions is not constant, and the pitch between the first convex portions arranged with the intermediate portion therebetween is longer than the pitch between the first convex portions not disposed with the intermediate portion interposed therebetween. The pitch of the longest first convex portions may be longer than the pitch of the second longest convex portions.

The height of the seat convex portion 511 is 0.3 mm or more and 10.0 mm or less and more preferably 0.4 mm or more and 6.0 mm or less and 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 and more preferably 0.5 mm or more and 5.0 mm or less and more preferably 1.0 mm or more and 4.5 mm or less. According to the seat convex portion 51 configured as described above, it is possible to suppress the discomfort of the appearance caused by the excessive convexity of the seat convex portion 51, and it is easy for the mounting assisting person to obtain a relief. In addition, since the seat convex portion 51 can be recognized visually, it is easy for the mounting assistant to have a sense of security about the absorption performance of the seat convex portion 51. [

The dimension 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, the better the permeability of the sides. On the other hand, the size of the convex portions of the sheet convex portions is smaller than that of the convex portions (the difference is 2 mm or less) . By forming the openings of a size close to the interval and the width of the seat convex portions, it becomes possible to make them compatible with the visual image in terms of function.

The second concave portion 522 is continuously arranged from the front edge R1F of the first region R1 to the front edge of the top sheet 50. [ The body fluid can be smoothly diffused from the front edge R1F of the first region R1 to the front edge of the topsheet 50 and the urine can be quickly spread over a large area It can be transferred to the absorber 40.

The first concave portion 521 and the second concave portion 522 are continuous in the back and forth direction L at the boundary between the first region R1 and the second region R2. The space in the first concave portion 521 and the space in the second concave portion 522 are communicated with each other so that the excrement can be smoothly diffused between the first region R1 and the second region R2 . For example, even when the attachment position of the absorbent article is shifted and the side is discharged to the second region R2, the side is guided to the first region R1 to receive and absorb the side by the first region R1 .

4) of the first convex wall portion 591 is larger than the rising angle beta (see Fig. 5) of the second convex wall portion 592 in the first region R1. The elevation angle alpha of the first convex wall portion 591 is larger than the elevation angle beta of the second convex wall portion 592 and the first convex wall portion 591 becomes a relatively steep slope. Therefore, the excrement contained in the first concave portion 521 can be easily retained by the first convex portion 511, and the excrement once received can be prevented from escaping from the first concave portion 521.

The elevation angle alpha of the second convex wall portion 592 is smaller than the elevation angle beta of the first convex wall portion 591 and the second convex wall portion 592 becomes a relatively gentle slope. The second region R2 is disposed at least in the crotch region 25. [ The crotch region 25 is in close contact with the skin of the wearer as compared with the rear waist region 30. Even when the crotch region where the second region R2 is located is brought into close contact with the skin due to the gentle inclination of the convex wall portion of the second region R2, contact with the skin by the second convex portion 512 can be smoothly can do.

On the other hand, the rising angle 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 point and its periphery are cut in parallel in the width direction. The cutting is carried out by a sharp blade (for example, a razor of a cutter) so as not to collapse as convex as possible. In order to prevent wrinkles from being formed on the cut sheet, the cut sheet is magnified 20 times with a microscope while the top sheet is placed on a horizontal plane, and a section is photographed. For the photographing section, the rising angle of the skin-facing side surface of the convex wall portion with respect to the horizontal plane (the surface excluding the fibers with fluff) is measured.

The fibers in the first convex wall portion 591 and the fibers in the second convex wall portion 592 have a large number of fibers oriented along the thickness direction of the topsheet than the fibers oriented along the front and rear direction and the width direction . According to such an absorbent article, the space on the skin non-facing surface side of the seat convex portion 51 is easily retained, the contact of the seat convex portion 51 to the skin is smooth, and the wearer can obtain a fluffy feel. In addition, it is easy to induce the body fluid in the thickness direction T by the fibers oriented in the thickness direction T. [ Therefore, even when the height of the seat convex portion 51 is set high, the body 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 the fibers are oriented in the thickness direction (the direction from the skin surface side to the non-skin surface side of the sheet) in the state where the sheet convex portion and the sheet concave portion are formed, And is oriented in the range of 45 degrees. The fiber orientation was measured using a digital microscope VHX-100 manufactured by Gensen Kabushiki Kaisha by the following measurement method. (1) setting the sample so that the surface of the convex wall portion can be observed on the observation target, (2) aligning the lens at the frontmost fiber of the sample except the irregularly protruding fibers, (3) 3D image on the PC screen. Next, (4) the 3D image is converted into a 2D image, and (5) a plurality of parallel lines are equally divided on the screen so as to equally divide the thickness direction of the convex wall portion in the measuring range. (6) measuring the number of fibers oriented in each direction in each cell in which parallel lines are drawn and subdivided; and (7) measuring the number of fibers oriented in the thickness direction in the thickness direction And the ratio of the number of fibers in the fiber orientation oriented in the direction orthogonal to the thickness direction can be calculated and calculated.

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

The front edge R1F of the first region R1 is located behind the center of the front and back direction L of the disposable diaper 10 and is located behind the bending guide portion of the absorbent body 40. [ The bending guide portion induces bending with the folding line along the width direction of the absorber 40 as a starting point. The bending guide portion is formed by cutting the absorber 40, the embossing line extending in the width direction W, And a stiffness difference is provided so that the absorber is bent from the above portion as a starting point. The bending guide portion of the present embodiment is constituted by a pair of first low-unit weight portions 41. [ The bending guide portion is disposed within a range in which the shrinkage region 84 of the three-dimensional gathers is arranged in the front-rear direction. The range in which the shrinkage area 84 is disposed in the forward and backward directions L is likely to shrink in the forward and backward directions L due to shrinkage of the shrinkage area 84. [ When a force of contraction is applied by the contraction region, the absorbent article is deformed from the bending guide portion as a starting point. The shrinkage force of the shrinkage region 84 is absorbed by deforming the bending guide portion located forward of the first region R1 as a starting point to hold the first region R1 in a flat state to draw the side I can continue to exercise.

The first region R1 is disposed between the pair of first fixing portions 81 in the width direction W. [ The outer edge of the first region R1 is located inward in the width direction than the first fixing portion 81. [ 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 rising portions 83 can be easily secured. Therefore, it is possible to prevent lateral leakage of the sides of the rear waist region 30. Further, since the standing portion 83 is easy to rise, the top sheet 50 is hardly covered by the three-dimensional gathers 80, and the discharged side can be easily guided into the first recess portion 521.

The rear edge R1R of the first area R1 is positioned behind the rear edge of the contraction area 84. [ The first region R1 is disposed so as to extend over the rear edge of the shrinkage region 84 in the forward and backward directions L. [ The stiffness near the trailing edge of the shrinkage region which is the rising point of the solid gathers becomes high. By increasing the rigidity of the rising point of the three-dimensional gathers, it is easy to secure the height of the three-dimensional gathers. More specifically, since the side of the second fixing portion 82 of the rising portion 83 is close to the rising starting point, it is difficult to secure the rising height compared with the center of the rising portion 83 in the forward and backward directions. In addition, since the region on the rear side of the shrinking region 84 is not contracted by the side elastic members 71, it is difficult to secure the rising height of the rising portions 83. [ The first region R1 is disposed on the rear side of the shrinkage region 84 and the rigidity of the top sheet 50 on the side of the second fixing unit 82 in the rear waist region 30 is increased. As the rigidity of the topsheet 50 is increased, the rising portions 83 are easy to rise and the height of the rising portions 83 can be easily ensured. Therefore, lateral leakage of the side in the rear waist region can be prevented. By securing the height of the three-dimensional gathers, it is possible to keep the function of preventing the top sheet from being covered by the three-dimensional gathers and guiding the discharged sides into the first recesses 521.

The rear edge R1R of the first region R1 is located forward of the waist-surrounding holding portion and is spaced apart from the waist surrounding holding portion. The waist-hole holding portion is a region between the pair of fixing portions 91. [ The waist-hole holding portion is a region in which the fixing portion 91 is fixed to the front waist region 20 and is brought into close contact with the body in a mounted state. Since the region between the pair of fixing portions 91 and the first region R1 are spaced apart from each other, it is easy to realize a state in which the mutation accommodated in the first concave portion 521 is away from the wearer's skin.

The rear edge R1R of the first region R1 is located forward of the waist expanding and contracting portion 85 and is spaced apart from the region where the waist expanding and contracting portion 85 is disposed. The region where the waist expanding / contracting portion 85 is disposed is a region that is in close contact with the body in the mounted state. The region in which the first region R1 and the waist expanding / contracting portion 85 are disposed is spaced apart from each other, so that the state in which the mutation accommodated in the first concave portion 521 is away from the skin of the wearer can be realized easily.

(3) Manufacturing method of top sheet

Next, an example of a method of producing the nonwoven fabric constituting the topsheet will be described. The production of the nonwoven fabric constituting the top sheet can be carried out by forming the sheet convex portion and the sheet concave portion by a forming process of stretching the nonwoven fabric. In the case of the embossing, the first embossing and the second embossing can be performed. The first concave portion 522, the second concave portion 522, the second concave portion 522 and the second concave portion 532 in the region corresponding to the entire widthwise direction of the topsheet 50, (542).

The second type of machining is performed after the first machining. In the second process of forming, the first convex portion 511 is formed in the region corresponding to the first region R1, and the other regions are not processed. Specifically, in the region corresponding to the first region, a part of the second convex portions 512 is further drawn to form the first convex portions 511. [ Of the second convex portions 512 formed by the first-round machining, the second convex portions 512, which have not been subjected to the second machining operation, constitute the intermediate portion 58. The second bottom portion 532 and the second opening 542 corresponding to the first region out of the second bottom portion 532 and the second opening 542 formed by the first package processing are formed in the first bottom portion 532 531 and a 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.

Further, when carrying out the embedding treatment, the bonded portion may be formed at the edge of the opening. The bonded portion is a portion to which the fibers constituting the top sheet are welded. Since the welded portion is formed at the edge of the opening, the strength of the opening increases and the opening shape can be easily maintained. Therefore, the entrapment of the excrement can be maintained.

(4) Other Embodiments

Subsequently, an absorbent article according to a modified example will be described. In the following description of the modification, the same reference numerals are used for the same constituent elements as those of the above-described embodiment, and the description is omitted. Fig. 8 is a view schematically showing the topsheet 50 and the absorbent article 400 of the absorbent article according to Modification 1. Fig. The absorbent body 400 according to the modified example has an absorbent convex portion 401 projecting toward the skin facing surface T1 and an absorbent concave portion 402 formed between the absorbent convex portion 401. [ The absorbing concave portion 402 may be recessed from the absorbing convex portion 401. The unit weight of the absorbing material of the absorbing concave portion 402 may be lower than the unit weight of the absorbing convex portion 401 or may be zero.

The first opening 541 is disposed in a region overlapping with the absorption convex portion 401 and in a region overlapping with the absorption concave portion 402. The distance between the first opening 541 and the absorber 40 is shortened by overlapping the absorbing convex portion 401 and the first opening 541. The body fluid drawn through the first opening 541 is absorbed by the absorber 40, So that it can be absorbed quickly. In addition, by overlapping the absorbing concave portion 402 and the first opening 541, a space for accommodating the side can be formed on the skin non-facing surface side T2 of the first opening 541, 541 can be drawn into the space. On the other hand, the first opening 541 may be disposed in an area not overlapping with the absorbing convex part 401, or may be disposed in an area not overlapping with the absorbing concave part 402. The second opening 542 may also be disposed in an area overlapping the absorbing convex portion 401 and the absorbing concave portion 402.

9 is a sectional view of the topsheet 500 in the absorbent article according to the second modification. The topsheet 500 according to Modification Example 2 has the groove wall portion 55 extending from the bottom portion 53 to the skin non-facing surface side T2 and the skin portion non-facing surface side T2 more than the groove wall portion 55 And a groove bottom portion 56 extending in the planar direction. The opening 54 is formed in the groove wall portion 55. A space is likely to be formed between the absorber 40 and the opening 54 because the opening 54 is formed in the groove wall 55. [ The space between the opening 54 and the absorbent body 40 can temporarily keep the excretion that has passed through the topsheet 50 and improve the pull-in performance.

10 is a sectional view of the topsheet 501 in the absorbent article according to Modification 3. Fig. The topsheet 501 according to Modification Example 3 has the first convex portion 511, the intermediate portion 58 and the first concave portion 521 extending in the front-rear direction. A dividing portion 57 is formed between the first convex portions 511 in the width direction W. [ The dividing section 57 is configured to divide a space extending in the front-rear direction of the first recess 521. The top of the dividing portion 57 is located on the skin non-facing surface side T2 of the top portion of the first convex portion 511 and is located on the skin facing surface side T1 than the top portion of the intermediate portion 58. [ More specifically, the area of the skin-facing side T1 of the space extending in the front-back direction L of the first concave portion 521 (the area of the skin-facing side T1 than the divided portion 57) But is not divided in the direction L and continues in the forward and backward directions L. [ On the other hand, the region of the skin non-opposing face side T2 (the region where the divided portions 57 are disposed) of the space extending in the front-rear direction L of the first concave portion 521 is divided in the forward and backward directions L And is discontinuous in the forward and backward directions (L). The dividing portions 57 are formed at intervals in the forward and backward directions L. Therefore, the first concave portion 521 is discontinuous in at least a part in the front-back direction (L). When the edge is discharged on the first area R1, the edge is accommodated in the first recess 521 between the first projections 511. The portion of the first concave portion 521 which is accommodated in the first concave portion 521 can be prevented from diffusing in the back and forth direction L by the portion that is discontinuous in the forward and backward direction L. [ Since the top portion of the first convex portion 511 is located on the skin facing side T1 of the top portion of the dividing portion 57, the excrement in the first concave portion 521 spreads in the back and forth direction L , And it becomes difficult to diffuse along the width direction (W). Therefore, lateral leakage of the sides can be prevented.

In the present embodiment, " extending in the front-rear direction " means a structure having at least a predetermined range in the front-rear direction and may be inclined with respect to the front-rear direction so that the angle with respect to the back- And the like. The term " extending in the width direction " also means a configuration having at least a constant width in the width direction, and a configuration in which it extends in the forward and backward directions 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 contents of the present invention have been disclosed through the embodiments of the present invention, but it should be understood that the description and the drawings constituting a part of this disclosure do not limit the present invention. From this disclosure, various alternative embodiments, embodiments and operational techniques will become apparent to those skilled in the art. Accordingly, the technical scope of the present invention is determined only by the inventive subject matter according to the proper patent claims from the above description.

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

The attachment aide can provide an absorbent article capable of recognizing the area where the sides are discharged with respect to other areas and obtaining a relief in use.

10: disposable diaper 20: front waist region
25: crotch region 30: rear waist region
40, 400: absorber 401: absorbing convex portion
402: absorbing recess 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 57:
58: intermediate portion 59: convex wall portion
80: steric gathers 84: shrinkage area
L: forward and backward direction R1: first region
R2: second region T1: skin-facing side
T2: skin non-opposing surface side W: width direction

Claims (18)

A front waist region, a rear waist region, and a crotch region located between the front waist region and the rear waist region,
A front-rear direction from the front waist region to the rear waist region, a width direction orthogonal to the front-
An absorbent body extending over the crotch region and extending to at least one of the front waist region and the rear waist region,
And a top sheet that is located on the skin-facing side of the absorbent body and is in contact with the wearer,
Wherein the top sheet has an opening formed between the convex portions of the sheet projecting toward the skin-facing surface side,
Wherein the top sheet has a first region arranged at least in the rear waist region and a second region arranged at least in the crotch region,
The shape of the seat convex portion of the first region is different from the shape of the seat convex portion of the second region,
And the opening is formed at least in the first region. The absorbent article as set forth in claim 1, further comprising a pair of steric gathers arranged on both outer sides in the width direction than the center in the width direction of the absorbent article,
Wherein each of the three-dimensional gathers has a shrinkage region which contracts in the anteroposterior 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 disposed across the trailing edge of the shrinkage region in the anteroposterior direction. The absorbent article according to claim 2, wherein the absorbent body has a bending guide portion that follows the width direction and induces bending of the absorbent article,
Wherein the bending guide portion is formed on the front side of the first region in a range in which the shrinkage region is disposed in the front-back direction. The absorbent article as set forth in claim 1 or 2, wherein a height of the seat convex portion of the first region is higher than a height of the seat convex portion of the second region. The absorbent article as set forth in claim 1 or 2, wherein a pitch of the convex portions of the first region is longer than a pitch of the convex portions of the second region. The absorbent article as set forth in claim 1 or 2, wherein a welded portion in which fibers constituting the topsheet are welded is formed at an edge of the opening. 3. The absorbent article according to claim 1 or 2, wherein the absorbent body has an absorbent convex portion protruding toward the skin-facing surface side and an absorbent concave portion formed between the absorbent convex portion,
And the opening of the first region is disposed in a region overlapping the absorption convex portion. 3. The absorbent article according to claim 1 or 2, wherein the absorbent body has an absorbent convex portion protruding toward the skin-facing surface side and an absorbent concave portion formed between the absorbent convex portion,
And the opening of the first region is disposed in an area overlapping the absorbing concave portion. The seat according to claim 1 or 2, wherein the seat convex portion has a convex wall portion extending toward the skin-facing surface side,
Wherein a rising angle of the convex wall portion of the first region is larger than a rising angle of the convex wall portion of the second region. 10. The absorbent article as set forth in claim 9, wherein the topsheet has fibers,
A space is formed between the convex portion of the seat and the absorbent body,
Wherein the fibers in the convex wall portion have a greater number of fibers oriented along the thickness direction of the topsheet than the fibers oriented in the front-back direction and the width direction. The seat according to claim 1 or 2, wherein a bottom portion extending in the front-rear direction and the width direction and an intermediate portion protruding toward the skin-facing surface side of the bottom portion are formed between the seat convex portions of the first region However,
And the top of the intermediate portion is located on the skin non-facing surface side than the top portion of the convex portion of the seat in the first region. 3. The absorbent article according to claim 1 or 2, further comprising: a waist-surrounding holding portion extending along the width direction in the front waist region and the rear waist region and holding the absorbent article on the wearer's body,
And the rear edge of the first region is located forward of the waist-surrounding holding portion. The seat according to claim 1 or 2, further comprising a groove wall portion extending between the seat convex portions toward the skin non-facing surface side,
And the opening is formed in the groove wall portion. The absorbent article as set forth in claim 1 or 2, wherein said seat convex portions of said first region are arranged in a zigzag pattern. The seat according to claim 1 or 2, wherein the seat convex portion of the first region extends in the longitudinal direction,
Wherein the sheet convex portion of the first region is provided with a dividing portion for dividing a space extending in the forward and backward direction between the convex portions of the sheet. The seat according to claim 1 or 2, wherein the height of the seat convex portion is 0.3 mm or more and 10.0 mm or less,
And the pitch of the convex portions of the sheet is 0.3 mm or more and 10.0 mm or less. 3. The absorbent article according to claim 1 or 2, wherein the outer edge of the topsheet is located inside the width direction of the outer edge of the absorbent body,
An auxiliary sheet located on the skin-facing side of the absorbent body is provided on the outer side in the width direction with respect to the outer edge of the absorbent body,
Wherein the auxiliary sheet and the top sheet are constituted by a nonwoven fabric,
Wherein the inter-fiber distance of the auxiliary sheet is longer than the inter-fiber distance of the top sheet. The absorbent article as set forth in claim 1 or 2, further comprising a pair of solid gathers disposed on both outer sides in the width direction than the center in the width direction of the absorbent article,
Wherein an outer edge of the topsheet is located on an outer side in the width direction than an inner edge of the three-dimensional gathers in a state in which the absorbent article is stretched.

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