KR20160037884A - Disposable diaper - Google Patents

Abstract

The disposable diaper 10 comprises an absorbent body 40 having an absorbent core, a pair of fastening tapes 90, a waist stretchable sheet having stretchability in the product width direction, and a waistline And a holding portion. The waist stretchable sheet has a back waist elastic sheet 85 disposed in the rear waist region and a front waist elastic sheet 86 disposed at the front end of the front waist region. A part of the rear waist stretchable sheet is superimposed on the rear end of the absorbent core and overlaps with the waist surrounding holding part. The front waist elastic sheet is disposed adjacent to the front end of the absorbent core.

Description

Disposable diaper {DISPOSABLE DIAPER}

The present invention relates to a disposable diaper.

BACKGROUND ART Conventionally, an absorbent body having a front waist region, a rear waist region and a crotch region and extending over a crotch region and extending to a front waist region and a rear waist region, Disclosed is a disposable diaper having a nipping tape (see, for example, Patent Document 1).

Generally, the fastening tape extends outward in the width direction from the widthwise outer end of the rear waist region of the disposable diaper. When the disposable diaper disclosed in Patent Document 1 is to be attached, the fastening tape of the rear waist region is pulled to the front waist region in a state where the crotch part of the disposable diaper is placed on the crotch of the wearer, .

In the disposable diaper of Patent Document 1, an elastic member that is stretchable in the width direction is disposed at the waist opening portion. The waist opening of the disposable diaper is brought into close contact with the waist of the wearer by the elastic member expanding and contracting.

Patent Document 1: Japanese Patent Application Laid-Open No. 2006-20665

However, the disposable diaper described above has the following problems.

In the disposable diaper disclosed in Patent Document 1, elastic members are disposed apart from areas extending in the width direction from the fastening tape. The region extending in the width direction from the fastening tape and the region in which the elastic member is disposed are arranged to fit in the wearer's body. However, between the region extending in the width direction from the fastening tape and the elastic member, it is not pushed by the body of the wearer, but is floated with respect to the region extending in the width direction from the fastening tape, Or there is a step and a step that extends.

Further, the absorbent core of the absorbent body is made of an absorbent material such as pulverized pulp, and the thickness of the region where the absorbent core is disposed is thicker than the thickness of the region where the absorbent core is not disposed. Further, the region where the elastic member is disposed becomes thicker than the state before the water storage due to the contraction of the elastic member. Therefore, the thickness of the disposable diaper in the vicinity of the waist opening becomes thicker than the thickness of the constituent member itself.

In the disposable diaper disclosed in Patent Document 1, the elastic member and the absorbent core are spaced apart from each other. The thickness of the region between the elastic member and the absorbent core is thinner than the thickness of the region where the elastic member is disposed and is thinner than the thickness of the region where the absorbent core is disposed. Thus, there is a step between the region between the elastic member and the absorbent core and the region where the elastic member is disposed, or a step between the region between the elastic member and the absorbent core and the region where the absorbent core is disposed.

On the other hand, in recent years, the demand from the user (purchaser) of the disposable diaper has been increasing. Particularly, when the diaper is worn by infants and young children, there is a demand for a burden on the skin that wants to reduce the burden on infants' skin as much as possible, There is an increasing demand for external appearance.

However, in the disposable diaper described above, since a plurality of steps are formed in the disposable diaper, the user feels that the stepped portion may irritate the skin, or the functionality of the disposable diaper is noticeable due to the step , And may feel dissatisfied with the outer appearance of the undergarment.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a disposable diaper capable of suppressing complaints of burden on the skin and complaints on appearance.

The disposable diaper (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) A crotch region (crotch region 25) positioned between the front waist region and the rear waist region and a crotch region (crotch region 25) positioned between the rear waist region and the product longitudinal direction (product longitudinal direction L) from the front waist region to the rear waist region, (An absorbent body 40) extending over at least one of the front waist region and the rear waist region over the crotch region and a product width direction (product width direction W) A pair of fastening tapes (fastening tape 90) disposed at an outer end in the product width direction of the rear waist region and fixed to the front waist region, and a pair of fastening tapes , The product width direction A waist stretchable sheet having elasticity to the wearer's body and a waist-surrounding holding portion extending along the product width direction in the front waist region and the rear waist region and holding the disposable diaper on the body of the wearer , The waist stretchable sheet includes a back waist elastic sheet (rear waist stretch sheet (85)) disposed in the rear waist region and a front waist elastic sheet (front waist elastic sheet) disposed at the front end of the front waist region (86), and a part of the rear waist elastic sheet is superimposed on the rear end of the absorbent core and overlaps with the waist elastic support member, and the front waist elastic sheet has a front waist elastic sheet And is disposed adjacent to the end portion.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded plan view of a stretched state of a disposable diaper according to the present embodiment. Fig.
2 is a plan view of a natural state of a part of the disposable diaper according to the present embodiment.
3 is a cross-sectional view of the disposable diaper taken along the line F1-F1 shown in Fig.
4 is a cross-sectional view of the disposable diaper taken along the line F2-F2 shown in Fig.

Next, an embodiment of the disposable diaper 10 according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts 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. Also, the drawings may include mutually different portions or proportions of the dimensions.

(1) Overall outline configuration of disposable diaper

1 is an exploded plan view of a stretched state of the disposable diaper 10 according to the present embodiment. 2 is a plan view of a natural state of a part (rear end side) of the disposable diaper according to the present embodiment. 3 is a sectional view of the disposable diaper taken along the line F1-F1 shown in Fig. 4 is a cross-sectional view of the disposable diaper taken along the line F2-F2 shown in Fig.

The stretched state shown in Fig. 1 is a state in which the elasticity of the leg stretching and shrinking portion 75 and the leg side gathers 80 is maintained until the wrinkles of the top sheet 50, the side flaps 70, etc. constituting the disposable diaper are not formed, (81) is stretched. On the other hand, when the disposable diaper 10 is sealed in a package or the like, it is taken out of the package and left for 12 hours in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH to be. The natural disposable diaper is formed with wrinkles on the top sheet 50, the side flaps 70, and the like, which constitute the disposable diaper.

The disposable diaper 10 is a tape-type disposable diaper. The tape type is a diaper in which the outer end in the product width direction of the front waist region and the outer end in the product width direction of the rear waist region are not bonded before use and are joined by a fixing member such as a fastening tape at the time of use .

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 that contacts the rear waist region (back 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 toward the rear waist region 30 is referred to as the product longitudinal direction L, and the direction orthogonal to the product longitudinal direction L is referred to as the product lateral direction W).

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

The absorbent core 40a is the same as that of the conventional disposable diaper, and can be appropriately configured using a known member or material such as pulverized pulp or superabsorbent polymer. The absorbent core 40a is surrounded by a sheet-like core wrap 40b. The outer sheet is disposed on the surface of the disposable diaper on the non-skin side. The outer sheet is made of, for example, a nonwoven fabric.

The core wrap 40b is a sheet that covers the absorbent core 40a. At least a part of the skin side of the core wrap 40b is composed of various fibrous nonwoven fabrics or tissue sheets having liquid-pervious properties. For example, an air-through fibrous nonwoven fabric, a spunbond nonwoven fabric, an SMS (spunbond-meltblown-spunbond) nonwoven fabric having a mass of about 10 to 30 g / m 2 or a tissue sheet having a mass of about 10 to 30 g / .

The absorbent body 40 of the rear waist region is provided with a low rigidity portion 110 as a low rigidity region in which the basis weight is lower than other portions of the absorbent body or the absorbent core 40a is not present. The low rigidity portion 110 has a shape in which the length of the end portion of the absorbent body 40 on the rear waist region side gradually decreases from the center in the width direction of the product to the front waist region side. More specifically, the disposable diaper is wedge-shaped in plan view. The boundary between the absorbent core 40a and the low rigidity portion 110 is formed as an arcuate convex in the center of the product width direction W. [ The absorber 40 outside the low rigidity portion 110 in the product width direction has a trapezoidal shape which is convex in the end direction on the rear waist region side.

Further, the thickness of the end portion in the longitudinal direction of the absorbent core of the absorbent core is thinner than the thickness of the absorbent core in the longitudinal direction of the product. More preferably, the thickness of the portion where the back waist elastic sheet is overlapped with the absorbent core is preferably thinner than the thickness of the portion of the absorbent core which is not overlapped with the back waist elastic sheet at the longitudinal direction end portion of the absorbent core.

The thickness can be adjusted by embossing the basis weight of the absorbent core. The thickness can be measured using a PEACOCK dialsikness gauge manufactured by Ozaki KK. Measuring terminal 10 mm in diameter Circular, adjust the load to 6.0 gf / ㎠, and measure the measurement site. The thickness of the disposable diaper is measured in the elongated state.

A liquid permeable top sheet 50 is provided on the surface side (skin contact surface side) of the absorber 40. In addition, a liquid-permeable back sheet 60a is provided on the back surface side of the absorber 40 (on the skin non-contact surface side). An external sheet 60 is provided on the back surface side (skin non-contact surface side) of the back sheet 60a.

The back sheet 60a is disposed inside the longitudinal direction of the product than the front end 10F of the disposable diaper and inside the longitudinal direction of the product than the rear end 10R of the disposable diaper. The back sheet 60a is disposed inside the product width direction than the product width direction end portion of the disposable diaper.

Side flaps 70 are provided on side edge portions of the absorber 40 in the product width direction W, respectively. The side flaps 70 extend over the front waist region 20, the crotch region 25 and the rear waist region 30 and are disposed outside the absorbent body 40 in the product width direction. The side flaps 70 are composed of one or a plurality of nonwoven fabrics stacked in layers of two or more.

A pair of leg openings 35 are formed in the side flaps 70 of the disposable diaper 10. The leg openings 35 are provided at side end portions in the product width direction of the disposable diaper and are disposed along the wearer's legs in a state in which the disposable diaper is worn by the wearer. The leg openings 35 are recessed in the center direction of the absorbent main body in the product width direction.

Further, the pair of side flaps 70 are provided with fastening tapes 90, respectively. The fastening tape 90 is disposed at the outer end in the product width direction of the rear waist region and fixed to the front waist region. The fastening tape 90 extends outwardly of the side flap 70 in the product width direction. And is fixed to the skin non-contact surface of the front waist region 20 by extending along the product width direction W in the rear waist region 30, thereby holding the disposable diaper 10 on the wearer's body.

The target portion 95 is arranged on the skin non-contact surface in the front waist region, and the pair of fastening tapes 90 are respectively fixed.

As the top sheet and the outer sheet, a nonwoven fabric sheet having alternately a high basis weight portion and a low basis weight portion in the product width direction can be used. By using such a top sheet, the force is concentrated on the boundary between the high basis weight portion and the low basis weight portion, which is preferable for elongation of the stretchable portion and can elongate. As a modified example, the topsheet and the outer sheet may be a nonwoven fabric sheet having alternately a high-density portion and a low-density portion at least in the product width direction. The high-density portion of the nonwoven fabric sheet having the high-density portion and the low-density portion alternately is formed in a state of being formed by continuous lines or in a state of being arranged in a dotted manner with intervals.

The nonwoven fabric sheet constituting the topsheet or the outer sheet is composed of a sheet having no heat fusion point by point or line embossing or a sheet having an area ratio of 5% to 15% of dot or line embossment. The area ratio of the embossment is the ratio of the area in which the embossment is formed. For example, it is the area of the portion of the outer sheet where the emboss is formed, relative to the total area of the outer sheet.

In the present embodiment, the waist-surrounding holding portion is constituted by the front waist region 20, the rear waist region 30, and the fastening tape 90. The waist-surrounding holding portion of the rear waist region 30 is a range extending from the region where the fastening tape 90 is engaged to the width direction of the product. The waist-surrounding holding portion of the front waist region 20 is a range extending from the region where the target portion 95 is provided in the product width direction.

The side flaps 70 are provided with a pair of leg stretchable and contractible portions 75 which are arranged on the outer side of the product width direction outer side of the product absorbent body 40 in the article width direction inner side than the leg opening portions 35 and extendable in the longitudinal direction L of the product do.

The leg stretchable and contractible portion 75 may be configured so that the leg opening portion 35 can be stretched and contracted in the longitudinal direction of the product or may be disposed along the leg opening portion 35, Or the like.

A pair of auxiliary stretchable and contractible portions 77 arranged over the crotch region 25 and the rear waist region 30 and extending and retracted in the longitudinal direction of the product are arranged outside the leg stretchable portion 75 in the product width direction . The region where the auxiliary stretchable portion 77 of the side flap 70 is provided is contracted so that the side flap 70 follows the buttocks of the wearer and the region covers the buttocks.

The leg stretchable and contractible portion 75 and the auxiliary stretchable and contractible portion 77 are portions that are substantially contracted in the longitudinal direction of the product by an elastic member such as a rubber or the like and the portion where the elastic members are disposed in a state in which the contractile force is not exerted The concept is excluded.

The leg stretchable and contractible portion 75 is composed of three elastic members for each side stretched and contracted in the longitudinal direction of the product. The auxiliary stretchable and contractible portion 77 is constituted by one elastic member stretched and contracted in the longitudinal direction of the product. The elastic member according to the present embodiment is made of polyurethane elastic fiber or natural rubber.

The rear end portion 75R of the leg stretchable and contractible portion 75 is disposed inside the fastening tape 90 in the product width direction with respect to the front fastening tape. Therefore, the region inside the front side and the width direction of the fastening tape 90 is contracted by the leg stretching and shrinking portion 75.

The front end portion 77F of the auxiliary stretchable and contractible portion 77 is disposed on the rear side of the front end portion 75F of the leg stretchable and contractible portion 75. [ Accordingly, the auxiliary stretchable and contractible portion 77 shrinks the region behind the forward end portion 75F of the leg stretchable and contractible portion 75. As shown in Fig. The rear end portion 77R of the auxiliary stretchable and contractible portion 77 is disposed on the rear side of the rear end portion of the leg stretchable and contractible portion. Therefore, the area behind the leg stretchable and contractible portion 75 is contracted by the auxiliary stretchable and contractible portion 77.

The crotch region of the disposable diaper can be pulled up toward the crotch part of the wearer by the leg stretching and shrinking portion 75. [ Further, the force pulled up by the leg stretchable and contractible portion can be transmitted to the fastening tape 90 by the auxiliary stretchable and contractible portion 77. Therefore, the fastening tape 90 can be held in the fixed state by the fastening tape 90 and the region where the leg stretching and shrinking portion 75 is disposed, as well as the region where the fastening tape 90 is held The region between the leg stretchable and contractible portions 75 can be easily brought into close contact with the wearer.

Further, the auxiliary stretchable and contractible portion can shrink the area outside the leg stretchable and contractible portion in the product width direction, and can cover the buttocks appropriately by the side flaps in the rear waist region. Therefore, in particular, it is possible to restrain the rear leg opening portion from being bent when worn. Further, the contraction of the leg stretchable and contractible portion can pull the leg opening portion toward the user's body, so that the leg opening portion can be prevented from being twisted.

The leg stretchable and contractible portion 75 is disposed between the side flap 70 and the outer sheet 60. The leg stretchable and contractible portion 75 is disposed between the back sheet 60a and the side flap 70 in the region where the back sheet 60a disposed between the absorbent body 40 and the outer sheet 60 is provided have.

The stretch ratio of the leg stretchable and contractible portion 75 is preferably 1.7 to 2.4 times. In the present embodiment, the elongation percentage of the leg stretch and shrinkable portion 75 is set to 1.9 to 2.2 times. The elongation percentage means the degree of elongation of the leg stretching portion and is defined as follows.

Elongation rate of leg stretching / shrinking portion = (length of leg stretching / shrinking portion in elongated state) / (length of leg stretching and shrinking portion in natural state)

The extension ratio of the auxiliary stretchable and contractible portion 77 is preferably 1.6 to 2.4 times. The elongation percentage of the auxiliary stretchable and contractible portion 77 means the elongation degree of the auxiliary stretchable and contractible portion and is defined as follows.

Elongation ratio of auxiliary stretchable and contractible portion = (length of auxiliary stretchable portion in stretched state) / (length of auxiliary stretchable portion in natural state)

In this specification, the elongation percentage is measured as follows, for example.

First, when the disposable diaper 10 is sealed in a package or the like, the disposable diaper 10 is taken out of the package. Next, the arrangement region of the measurement object such as the leg stretchable portion or the like is cut off. At this time, an external sheet to which the object to be measured such as the leg stretchable portion or the like is bonded is also cut. The elongation of the sample after cutting is measured, and the elongation of the object to be measured is measured.

Each sample is allowed to stand for 60 minutes in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH, and the length of the object to be measured is measured along the stretching direction. This length is defined as " the length of the object to be measured (the leg stretching portion or the like) in a natural state ".

Second, the length in the stretching direction of the desired region in such a state (i.e., the natural state) and the length of the desired region when the stretch from the natural state to the state where the wrinkles caused by the elastic member can not be visually confirmed on the non-stretchable sheet Measure the length in the expansion and contraction direction. This length is referred to as the " length of the object to be measured (leg stretching portion or the like) in the elongated state ".

Using these measurement results, the elongation is measured by calculating the above-mentioned formula.

In this specification, the " length " is measured by the following measuring method.

When the disposable diaper 10 is encapsulated in a package or the like, the sample is taken out of the package and left in the state of 20 ° C ± 2 ° C and relative humidity 60% ± 5% RH for 12 hours.

Then, the length of this state of the measurement target site is measured by using a spring meager (tape: glass fiber polyvinyl chloride coating) manufactured by Shinwa Measurement Co., Ltd., along the measurement target site. The length of the stretched state is measured as the length of the portion to be measured when the disposable diaper 10 is stretched from a natural state to a state in which the wrinkles caused by the elastic member can not be visually confirmed.

Here, the above-described measurements were made for each of the 10 samples in each state, and the average value was taken as the length.

A pair of leg side gathers 80 extending along the product longitudinal direction L are provided inside the pair of leg stretchable and contractible portions 75 (in the vicinity of the center in the product width direction W). The leg side gathers 80 are provided at inner ends of the side flaps 70 in the product width direction and are located on the inner side of the leg stretch and shrink 75 in the product width direction. The leg side gathers 80 are disposed on the inner side of the leg stretchable portion 75 in the product width direction. The leg side gathers 80 may be of a well-known configuration in the prior art, and specifically may be composed of a sheet material different from the side flaps 70. [

The disposable diaper 10 has a waist stretchable sheet that extends in the product width direction center of the disposable diaper and has elasticity in the product width direction. The waist stretchable sheet has a back waist elastic sheet 85 disposed at the rear end of the disposable diaper and a front waist elastic sheet 86 disposed at the front end of the disposable diaper. 1, an imaginary line L1 extending in the longitudinal direction of the product passes through the center in the product width direction of the disposable diaper.

The rear end portion 10R of the disposable diaper has a concave curved shape inward in the product longitudinal direction than the product width direction outer side of the rear end portion 10R in the product width direction center of the rear end portion 10R in the natural state of the disposable diaper . The rear end portion of the rear waist elastic sheet 85 positioned at the rear end of the disposable diaper also has a curved shape in which the center in the product width direction is recessed inwardly in the longitudinal direction of the product than in the product widthwise direction.

The front end portion 85F of the rear waist elastic sheet 85 is formed such that the center in the product width direction of the front end portion 85F is located at the front end portion 85F in the elongated state Which is curved toward the outside in the longitudinal direction of the product. The curvature of the rear waist elastic sheet is not formed all over the front end portion 85F but is formed at the center in the width direction which is a part of the front end portion.

The rear waist stretchable sheet 85 is disposed between a pair of fastening tapes in the product width direction. A part of the front end portion 85F of the rear waist stretchable sheet 85 overlaps the absorbent core 40a. The rear end portion 85R of the rear waist stretchable sheet 85 coincides with the rear end portion of the disposable diaper. The length of the rear waist stretchable sheet 85 in the product width direction is longer than the length in the product width direction of the absorbent core 40a and longer than the width direction of the back sheet 60a. The rear waist stretchable sheet extends outward from the absorbent core 40a in the product width direction and extends outward beyond the back sheet 60a in the product width direction. A part of the rear waist stretchable sheet 85 is superimposed on the waist-surrounding holding portion.

The front end portion 10F of the disposable diaper 10 has a curved shape in which the center in the product width direction of the front end portion 10F is recessed inward in the product length direction than the product widthwise outer side of the front end portion 10F in the natural state of the disposable diaper . The front end 86F of the front waist elastic sheet 86 positioned at the front end of the disposable diaper is also in the natural state of the disposable diaper such that the center in the product width direction of the front end 86F is in the width direction of the front end 86F And has a curved shape recessed inwardly in the longitudinal direction of the product from the outside.

The rear end portion 86R of the front waist elastic sheet 86 is formed such that the center in the product width direction of the rear end portion 86R is in contact with the rear end portion 86R in the elongated state Which is curved toward the outside in the longitudinal direction of the product. The curved shape of the front waist elastic sheet is not formed in the entire region of the rear end portion 86R but is formed in the widthwise center portion which is a part of the rear end portion 86R.

The front waist stretchable sheet 86 is adjacent to the absorbent core 40a and the target portion 95 in the longitudinal direction of the product. More specifically, the rear end portion 86R of the front waist stretchable sheet 86 is adjacent to the front end portion of the absorbent core 40a and also adjacent to the front end portion of the target portion 95. [ The rear end portion 86R of the front waist stretchable sheet 86 is located outside the outer target portion 95 in the lengthwise direction of the product than the absorbent core 40a. The state in which the front waist stretchable sheet 86 and the absorbent core 40a are adjacent to each other and the state in which the front waist elastic sheet 86 and the target portion 95 are adjacent to each other is a state in which the distance therebetween is 0 mm or more and 5 mm or less.

The front end 86F of the front waist stretchable sheet 86 coincides with the front end of the disposable diaper. The length of the front waist stretchable sheet 86 in the product width direction is longer than the length of the absorbent core 40a in the product width direction and is longer than the length in the width direction of the back sheet 60a. The front waist stretchable sheet 86 extends outward beyond the absorbent core 40a in the product width direction and further extends outward than the back sheet 60a in the product width direction.

The rear end portion 86R of the front waist stretchable sheet 86 is adjacent to the absorbent core 40a and also adjacent to the target portion 95 in the longitudinal direction of the product. The rear end portion 86R of the front waist stretchable sheet 86 is located outside the outer target portion 95 in the lengthwise direction of the product than the absorbent core 40a.

The front end portion 60aF of the back sheet 60a is positioned between the front end portion 10F of the disposable diaper 10 and the front end portion of the absorbent core 40a and the rear end portion 60aR of the back sheet 60a is located at the front end portion of the disposable diaper And is located between the rear end 1OR and the rear end of the absorbent core 40a.

In the present embodiment, it is preferable to use a seat in which the width of the seat in the second direction (the so-called width decreases) in the second direction which is straightened in the stretching direction when the waist stretchable sheet is stretched in one direction of the sheet.

The waist stretchable sheet is a sheet made of a mixture of an elastic stretchable elastic fiber and an inelastic stretchable nonelastic fiber, particularly a mass of 20 to 80 g / m 2, more preferably a mass of 40 to 75 g / m 2 , More preferably 50 to 70 g / m < 2 >, wherein the elastic fibers are filaments of polyurethane fibers having a fineness of 2 to 6 dtex, the non-elastic fibers are polyolefins having a fineness of 2 to 6 dtex A spunbonded nonwoven fabric sheet in which at least one filament in a filament of a fiber, a polyester fiber and a polyamide fiber is used and a weight mixing ratio of the elastic fiber and the non-elastic fiber is in the range of 40:60 to 60:40. The nonwoven fabric of the mixed fibers of the non-elastic fibers and the elastic fibers is stretched by breaking a portion of the non-elastic fiber layers by the gears. Other waist stretchable sheets can be of a shape with a reduced width of the present invention in a relatively easy manner if the width of the sheet is reduced. The waist stretchable sheet is not limited to a nonwoven fabric sheet but may be a film sheet. Further, it is also possible to use a sheet that has been previously formed so that the width of the stretchable sheet in the longitudinal direction of the product changes in advance (cut to be convex inward). The waist stretchable sheet is bonded to the outer sheet 60 by a hot-melt adhesive, a heat treatment or the like.

And the elongation percentage of the rear waist stretchable sheet 85 is preferably 1.4 to 1.8 times. In the present embodiment, the elongation percentage of the rear waist stretchable sheet 85 is set at 1.5 to 1.6 times. The elongation percentage means the degree of elongation of the rear waist elastic sheet, and is defined as follows.

Elongation rate of the rear waist elastic sheet = (length of the back waist elastic sheet in the stretched state) / (length of back waist elastic sheet in the natural state)

The elongation percentage of the front waist stretchable sheet 86 is preferably 1.3 to 1.7 times. In the present embodiment, the elongation percentage of the front waist stretchable sheet 86 is set at 1.4 to 1.6 times. The elongation percentage means the elongation degree of the front waist stretchable sheet and is defined as follows.

Elongation rate of the front waist stretchable sheet = (length of front waist stretchable sheet in stretched state) / (length of front waist stretchable sheet in natural state)

By providing such a sheet-like waist stretchable sheet, the region where the waist stretchable sheet is disposed (in the vicinity of the waist opening) follows the body with the face. Therefore, the wearer's body can be preferably covered. On the other hand, in the configuration in which a plurality of threaded elastic members are provided, the threaded elastic member portions follow the body, but strictly, the portions between the elastic members in the threaded shape do not touch the body. Therefore, the wearer is forced to follow the body with a line, and the wearer's body becomes insufficiently covered. Further, since the waist stretchable sheet has elasticity, the sheet itself is excellent in flexibility and can impart a cushioning feeling to the waist circumference. Furthermore, in a state in which the waist stretchable sheet is contracted, the portion where the waist stretchable sheet is disposed is liable to be in a swollen state, and the state of touch is excellent.

In the present embodiment, the waist stretchable sheet is joined to a sheet disposed between the waist stretchable sheets. Specifically, the waist stretchable sheet is disposed between the outer sheet 60 and the back sheet 60a. However, in the configuration in which the core wrap 40b extends outward in the longitudinal direction of the absorbent core 40a than the absorbent core 40a, the waist stretchable sheet is formed between the core wrap 40b and the back sheet 60a or between the outer sheet 60 As shown in Fig. The position of the waist stretchable sheet is not particularly limited. Further, in the region where the absorber is not disposed, the side flap 70 and the back sheet 60a or the external sheet 60 may be disposed. The waist stretchable sheet is adhered to the outer sheet 60 or the like by hot melt adhesive or heat treatment.

In the region where the waist stretchable sheet is arranged, the bonding of the sheets (specifically, the top sheet, the back sheet, and the waist stretch sheet) is fixed by an intermittently applied adhesive (hot melt adhesive). Intermittent application refers to a state in which a linear adhesive is applied while forming a meandering or spiral shape, not in a state of being coated in a planar shape.

The rear waist stretchable sheet 85 overlaps with a part of the low rigidity portion 110 of the absorbent article when the disposable diaper is flat. In the present embodiment, the rear waist stretchable sheet 85 is superimposed on a part of the low rigidity portion 110, but all of the rear waist stretchable sheet 85 and the low rigidity portion 110 may be stacked .

The formation of the low rigidity portion 110 makes the low rigidity portion 110 narrow and the rigidity of the low rigidity portion 85 is small even if the rear waist stretchable sheet 85 is contracted without inhibiting the elongation and contraction of the rear waist elastic sheet 85. [ 110, the space between the absorbers on both sides in the product width direction is narrowed, so that the absorber 40 is hardly raised in an unexpected shape. The portion where the low rigidity portion 110 is formed is difficult to protrude, and the low rigidity portion 110, which is hard to rise, is formed at the center in the product width direction of the disposable diaper. Therefore, in the product width direction of the disposable diaper, the step between the absorbent core and the waist elastic sheet can be suppressed. The low rigidity portion may be formed not only at the rear end portion of the absorber but also at the front end portion of the absorber.

The waist stretchable sheet according to the present embodiment is configured to be stretchable in the product width direction. However, the waist stretchable sheet may be configured to expand and contract in the product width direction and the product length direction.

The fastening tape 90 is attached to the area of the side flap 70 corresponding to the rear waist region 30. [ The fastening tape 90 has a base sheet 91 connected to the side flap 70 and a hook sheet 92 fixed to the base sheet 91 and provided with an engagement hook (not shown) as a plurality of engagement members . The hook sheet 92 is an area where the engaging member is provided, and the above-described waist-surrounding holding portion in the rear waist region is a region extending from the hook sheet 92 in the product width direction.

The hook sheet 92 is fixed to the base sheet 91, specifically, bonded thereto. It is preferable that the fastening tape 90 and the base sheet 91 are joined so that the rigidity of the fastening tape 90 does not become higher than necessary. Specifically, it is preferable that the hook sheet 92 and the base sheet 91 are bonded together by an intermittently applied hot melt adhesive such as a point shape, a linear shape or a spiral shape. The hook sheet 92 and the base sheet 91 may be joined together by heat sealing or the like.

The base sheet 91 is composed of one or a plurality of nonwoven fabrics in which a plurality of or more are overlapped. As the substrate sheet 91, a nonwoven fabric manufactured by a manufacturing method such as a spun bond (SB) or a spunbond-meltblown-spun bond (SMS) can be used. The basis weight (the total basis weight in the case of a plurality of sheets) of the nonwoven fabric constituting the base material sheet 91 is 30 to 120 g / m 2, preferably 40 to 90 g / m 2.

The fastening tape has a base portion 93 which overlaps with the outer sheet, and an extension portion 94 which extends outward from the outer sheet in the product width direction. The base portion 93 is a portion of the base sheet 91 that overlaps the outer sheet in the state in which the fastening tape is developed. The extended portion 94 is a portion of the base sheet 91 that is not overlapped with the outer sheet. In the stretched state of the disposable diaper shown in Fig. 1, in the longitudinal direction of the product, the center in the product longitudinal direction of the extended portion coincides with the product longitudinal direction center of the base portion. However, in the natural state of the disposable diaper, the position of the fastening tape changes with the curvature of the rear waist elastic sheet 85, and the center of the extension in the longitudinal direction of the product is located outside the product longitudinal direction center do.

In the present invention, the state in which the members are superimposed not only includes a state in which the members directly overlap each other, but also a state in which the members are indirectly overlapped (a state in which other members are interposed and overlapped).

The target portion 95 is provided on the surface of the outer sheet 60 of the front waist region on the non-skin side. The target portion 95 is configured to catch an engagement hook of the fastening tape, and functions as a loop of a hook-loop engagement system. As the target portion, for example, air through nonwoven fabric may be used.

As the target portion 95, for example, a fiber nonwoven fabric made of a polyolefin thermoplastic synthetic resin fiber or a polyolefin thermoplastic synthetic resin film can be used. Further, the loop attached to the target portion can be formed of a polyolefin-based thermoplastic synthetic resin.

As the target portion 95, a nonwoven fabric having a large volume, and a portion of the nonwoven fabric may be embossed to prevent fluff on the surface of the nonwoven fabric may be used.

The outer sheet 60 of the disposable diaper is formed of a nonwoven fabric and the pattern indicating the attachment position of the fastening tape 90 is printed on the skin noncontact side surface of the back sheet 60a or the outer sheet 60, Or by arranging a patterned sheet on the skin noncontact side of the back sheet 60a or the outer sheet 60. [

When the disposable diaper is to be attached, the attaching assistant pulls the fastening tape of the rear waist region toward the front waist region side. The mounting assistant fixes the fastening tape to the target portion while pulling the fastening tape to the front waist region.

(2) Manufacturing method of disposable diaper

Next, an example of a method of manufacturing the disposable diaper according to the present embodiment will be described. The conventional method can be used for the method not described in this embodiment. In addition, the production method described below is an example, and the production method can also be produced by another manufacturing method. A method of manufacturing a disposable diaper includes at least a component forming step, a component placing step, a leg-hole forming step, and a cutting step.

A method of manufacturing a disposable diaper is a method of manufacturing a disposable diaper by manufacturing a continuous body in a state in which the disposable diaper is continuous in the longitudinal direction of the product and cutting the continuous body into a size of one product along the product width direction do.

In the constituent part forming step, constituent parts constituting the disposable diaper are formed. Specifically, for example, the absorbent core 40a is formed by laminating the absorbent material.

In the constituent component arranging step, another web such as a waist stretchable sheet or a continuous web constituting a top sheet, an absorbent body, a leg stretchable and contractible portion 75, an auxiliary stretchable and contractible portion 77, The disposable diaper 10 and the like are arranged.

At this time, the waist stretchable sheet is a state in which the front waist stretchable sheet 86 of an optional disposable diaper and the back waist stretchable sheet 85 of the disposable diaper adjacent to the optional disposable diaper are integrated. The stretchable sheet is stretched in the product width direction of the disposable diaper, and the stretchable sheet is stuck on a continuous web (for example, . Both ends of the stretchable sheet are hardly elongated because the stretchable sheet is stretched in a state in which both ends of the stretchable sheet are held. The elongation percentage of the end portions of the stretchable sheet in the product width direction is lower than the elongation percentage in the product width direction of the region between the both end portions.

More specifically, in the region where the waist stretchable sheet of the disposable diaper is disposed, three sections having different elongation ratios are formed. A middle portion in the product width direction of the region where the waist stretchable sheet is disposed is set as a central region and a product width direction end portion (corresponding to both end portions of the waist stretchable sheet) of the region in which the waist stretchable sheet is arranged is defined as a side region, , The relationship of the elongation percentage is an elongation percentage in the product width direction of the center region> an elongation percentage in the product width direction of the middle region> an elongation percentage in the product width direction of the side region.

The elongation percentage in the product width direction of the central region can be set to 1.4 times to 1.8 times. The elongation percentage of the side region in the product width direction is set to be lower than the elongation percentage in the product width direction of the center region, and may be 1.0 to 1.1 times. The elongation percentage of the intermediate region in the product width direction is set to be lower than the elongation percentage in the product width direction of the central region and higher than the elongation percentage of the side region, and may be 1.2 to 1.3 times. Alternatively, it may be an area in which the extension in the product width direction of the side area is 1.0 times and the side area is not substantially stretched.

Further, the stretchable sheet stretched in the product width direction decreases in width in the longitudinal direction of the product. Particularly, the width of the stretchable sheet in the width direction of the product decreases in width. Therefore, the stretchable sheet in the stretched state has a length in the product longitudinal direction at the center in the product width direction shorter than a product length direction in the product width direction end portion. 1, the rear end portion of the front waist elastic sheet and the front end portion of the back waist elastic sheet corresponding to the end portion of the stretchable sheet in the longitudinal direction of the product are arranged in the width direction outer side The center of the width direction is concave.

The leg circumference forming process cuts the top sheet 50, the outer sheet 60, and the back sheet 60a. As a result, the front end portion 77F of the auxiliary stretchable and contractible portion 77 is cut, and the leg opening portion 35 disposed around the wearer's leg is formed.

In the cutting step, the continuous body in which the topsheet 50, the backsheet 60a, the absorbent body 40, and the like are disposed is cut along the product width direction W to the size of one product. Thus, the disposable diaper 10 is manufactured.

The continuum is cut for each product so that the extension state of the waist stretchable sheet and the leg stretchable and contractible portion provided on the disposable diaper is released and becomes a natural state. When the stretched state is released, the waist stretchable sheet in the state of reduced width at the time of stretching is deformed to return to the state before the width is reduced. Therefore, the rear end portion of the rear waist stretchable sheet and the front end portion of the front waist stretchable sheet are straight in the stretched state, but are deformed from the natural state to the curved state.

Further, when the continuum is cut and naturalized for each product, the front end portion of the front waist stretchable sheet is contracted more than the rear end portion of the front waist stretchable sheet, and the rear end portion of the back waist stretchable sheet is folded at the front end portion Lt; / RTI > The front end portion of the front waist stretchable sheet is further shrunk because the rigidity of the absorbent core 40a is not affected by being farther from the absorbent core 40a than the rear end portion of the front waist stretchable sheet. The rear end of the rear waist stretchable sheet is further shrunk because the rigidity of the absorbent core 40a is not affected by the distal end of the back waist elastic sheet from being farther from the front end of the back waist elastic sheet than the absorbent core 40a.

The front end portion of the front waist stretchable sheet is contracted more than the rear end portion of the front waist elastic sheet so that the product width direction center of the front end portion of the disposable diaper is curved inwardly inward in the product longitudinal direction than the product widthwise outer side of the front end portion of the disposable diaper . Similarly, since the rear end of the rear waist elastic sheet is contracted more than the front end of the rear waist elastic sheet, the center in the product width direction of the rear end of the disposable diaper is recessed inward in the product lengthwise direction of the rear end of the disposable diaper, And becomes a curved shape.

(3) Action and effect

The rear waist elastic sheet 85 is overlapped with the rear end of the absorbent core 40a and the back waist elastic sheet 85 is not separated from the absorbent core 40a. For example, the area between the waist stretchable sheet and the absorbent core 40a is floated, and the step due to the change in thickness may be conspicuous by the area. However, since a part of the rear waist stretchable sheet 85 overlaps the rear end of the absorbent core 40a, the thickness can be changed stepwise in the overlapping portion.

In addition, a part of the back waist elastic sheet 85 overlaps with the waist surrounding holding part. Therefore, it is possible to prevent the region between the waist-surrounding holding portion and the waist stretchable sheet from rising, or the step against the waist-surrounding holding portion or the like from being generated.

By gradually decreasing the step to the rear end of the disposable diaper, discomfort to the skin due to the step can be suppressed. Further, since the thickness of the disposable diaper changes smoothly, it is possible to realize an appearance similar to that of an undergarment. Such a disposable diaper can suppress dissatisfaction with the user's burden on the skin and discomfort with the appearance.

The thickness (natural state) of the disposable diaper according to the present embodiment is about 1.5 mm to 3.0 mm, The thickness of the longitudinal end portion (the portion where the back sheet is not arranged) is about 1.0 mm to 2.0 mm.

The front waist stretchable sheet 86 is disposed adjacent to the front end portion of the absorbent core 40a and the region where the thickness is thickened by the front waist elastic sheet and the region where the thickness is thickened by the absorbent core 40a are adjacent I have. Therefore, even in the front waist region, the thickness of the disposable diaper can be changed smoothly to realize an appearance similar to the undergarment.

The front end portion 60aF of the back sheet is positioned between the front end portion 10F of the disposable diaper and the front end portion of the absorbent core 40a and the back end portion 60aR of the back sheet is located between the rear end portion of the disposable diaper and the absorbent core 40a, 40a. ≪ / RTI > It is possible to set a change in thickness depending on the presence or absence of the backsheet in the region between the absorbent core 40a and the end portion in the longitudinal direction of the product of the disposable diaper so that the thickness can be changed more smoothly.

The rear waist elastic sheet 86 is disposed adjacent to the front end portion of the target portion and the front waist elastic sheet 86 not overlapping the front waist elastic sheet and the target portion has a natural state of the disposable diaper Lt; / RTI > On the other hand, the target portion 95 is a portion necessary for fixing the fastening tape. When the portion is contracted, wrinkles are generated, and the fastening tape becomes insufficiently engaged. Further, in general, the fastening tape portion often uses a high-basis weight or high-rigidity sheet as compared with other sheets (such as a top sheet and a back sheet) of a disposable diaper. Therefore, when the target portion on which the fastening tape is fixed is shrunk, the fastening tape or the impression with a foreign body tends to be impression. Therefore, it is preferable that the front waist stretchable sheet and the target portion are disposed adjacent to each other without overlapping the front waist stretchable sheet and the target portion.

A top sheet having a high basis weight portion and a low basis weight portion is disposed in a range from a region where at least the waist stretchable sheet is disposed to an end portion in the product longitudinal direction of the disposable diaper. The state in which the waist stretchable sheet is disposed in a range from the region where the waist stretchable sheet is disposed to the end portion in the product longitudinal direction of the product is a state that covers the back waist elastic sheet and is disposed from the back waist elastic sheet to the rear end of the disposable diaper State and the front waist stretchable sheet and is disposed from the front waist elastic sheet to the front end of the disposable diaper.

By using a top sheet having a high basis weight portion and a low basis weight portion, when the waist stretchable sheet is contracted, the low basis weight portion tends to shrink, so that the adjacent low basis weight portion and high basis weight portion are in a state of being close to each other. That is, in the natural state of the disposable diaper, the portion where the topsheet is arranged is liable to become more bulged, and it is easy to realize the thickness feeling while maintaining the flexible state. As a result, it is possible to make a state in which the difference in thickness does not become more noticeable from the end of the article in the longitudinal direction of the absorbent body to the end in the longitudinal direction of the article of the disposable diaper.

At least one of the topsheet and the outer sheet is composed of a nonwoven fabric sheet having no heat fusion point by point or line embossing or a nonwoven fabric sheet having an area ratio of 5% to 15% of dot or line embossment. The top sheet and the sheeting sheet made of such a nonwoven fabric sheet have a high degree of freedom in the portion where no heat fusion point is formed and the portion where no embossing is formed. Therefore, the portion having a high degree of freedom of the fiber tends to become unstable in the natural state. As a result, it is possible to make a state in which the difference in thickness does not become more noticeable from the end of the article in the longitudinal direction of the absorbent body to the end in the longitudinal direction of the article of the disposable diaper.

The waist stretchable sheet is bonded to a sheet disposed between the waist stretchable sheets through an adhesive. Since the adhesive is applied intermittently, the bonding points of the sheets are small. In the state in which the waist stretchable sheet is contracted, the thickness of the product in the non-joined portion (the portion not coated with the adhesive) becomes large, and the state of flexibility becomes high.

The thickness of the end portion of the absorbent core in the longitudinal direction of the absorbent core is smaller than the thickness of the center of the absorbent core in the longitudinal direction of the product. The thickness gradually changes from the crotch part of the disposable diaper to the end of the absorbent body in the longitudinal direction of the article and from the end of the article in the longitudinal direction of the absorbent body to the end in the longitudinal direction of the article of the disposable diaper. The user is less likely to feel the step difference of the disposable diaper.

(4) Other Embodiments

As described above, the contents of the present invention have been disclosed through the embodiments of the present invention, but the description and the drawings constituting a part of this disclosure should not be construed as limiting the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will become apparent to those skilled in the art.

In a modified example, the front waist elastic sheet may be superimposed on the front end of the absorbent core 40a.

In a modified example, the front end portion of the back sheet may extend to the front end portion of the disposable diaper, or may be rearward of the front end portion of the absorbent core. In a modified example, the back end of the back sheet may extend to the rear end of the disposable diaper, or may be forward of the back end of the absorbent core.

In the modified example, the length of the side region in the product length direction may be equal to the length in the product length direction of the central region, or may be shorter than the length in the product length direction of the center region.

In a modified example, the rear end of the front waist stretchable sheet may be superimposed on the front end of the target portion.

In a modified example, the back sheet may be provided with a pattern visible from the skin non-contact surface side of the disposable diaper. The pattern may be formed by printing, or may be formed by any of embossing, heat welding, and ultrasonic sealing.

The pattern is disposed in a region overlapping the absorbent core. Further, the pattern is not disposed between the front end of the disposable diaper and the front end of the absorbent core, and is not disposed between the rear end of the disposable diaper and the back end of the absorbent core. The pattern is not arranged at a position near the waist portion, a portion where there is no absorbent core and the skin color of the wearer is likely to permeate. Therefore, it is possible to give an impression to remind the waist of the underwear.

In a modified example, the top sheet may not be constituted by a nonwoven fabric sheet alternately having a high basis weight portion and a low basis weight portion in the product width direction.

In the modified example, the topsheet may not be composed of a nonwoven fabric sheet having no heat fusion points due to point or line embossing, and may be constituted by a nonwoven fabric sheet having an area ratio of 5% to 15% It does not need to be. The external sheet may not be constituted by a nonwoven fabric sheet having no heat fusion point by point or line embossing, and may not be constituted by a nonwoven fabric sheet having an area ratio of 5% to 15% good.

In a modified example, the adhesive for bonding the waist stretchable sheet and the waist stretchable sheet to each other may not be arranged intermittently, but may be disposed on the whole surface.

In a modification, the thickness of the end portion of the absorbent core in the longitudinal direction of the absorbent core may be equal to the thickness of the center of the absorbent core in the longitudinal direction of the product, or may be thicker than the thickness of the absorbent core in the longitudinal direction of the product.

As described above, it goes without saying that the present invention includes various embodiments not described herein. Accordingly, the technical scope of the present invention is determined only by the inventive particulars of the relevant patent claims from the above description.

The entire contents of Japanese Patent Application No. 2013-156040 (filed on July 26, 2013) are incorporated herein by reference.

According to the present invention, it is possible to provide a disposable diaper capable of suppressing complaints of burden on the skin and discomfort of the appearance.

10: Disposable diapers
20: front waist region
25: Crotch area
30: rear waist region
35: leg opening
40: absorber
40a: absorbent core
40b: core wrap
50: top sheet
60: Exterior sheet
60a: back sheet
70: Side flap
75: leg stretching part
75F: front end
75R: rear end
77: auxiliary elastic member
77F: front end
77R: rear end
80: leg side gathers
81: Elastic member
85: rear waist elastic sheet
85F: front end
85R: rear end
86: Front waist elastic sheet
86F: front end
86R: rear end
90: Fastening tape
91: substrate sheet
92: Hook sheet
93: Base portion
94: Extension
95:
110: Low rigidity
L: Length direction of product
W: Product width direction

Claims (8)

A front waist region, a rear waist region, a crotch region located between the front waist region and the rear waist region,
A longitudinal direction of the product from the front waist region toward the rear waist region,
A product width direction orthogonal to the product longitudinal direction,
An absorbent body extending over the crotch region and extending to one or both of the front waist region and the rear waist region and having an absorbent core;
A pair of fastening tapes disposed at an outer end in the product width direction of the rear waist region and fixed to the front waist region,
A waist stretchable sheet extending in the product width direction center of the disposable diaper and having elasticity in the product width direction,
And a waist-surrounding holding portion extending along the product width direction and holding the disposable diaper on the wearer's body in the front waist region and the rear waist region,
The waist stretchable sheet has a rear waist elastic sheet disposed at a rear end portion of the rear waist region and a front waist elastic sheet disposed at a front end portion of the front waist region,
A part of the back waist elastic sheet is superimposed on the rear end of the absorbent core and overlaps with the waist surrounding holding part,
And the front waist elastic sheet is disposed adjacent to the front end of the absorbent core. The absorbent article as set forth in claim 1, further comprising: a liquid-pervious back sheet disposed on the skin non-contact surface side of said absorbent body,
The front end of the back sheet is positioned between the front end of the disposable diaper and the front end of the absorbent core,
And the rear end of the back sheet is positioned between the rear end of the disposable diaper and the rear end of the absorbent core. The disposable diaper according to claim 2, wherein the back sheet is provided with a pattern visible from the skin non-contact surface side of the disposable diaper,
Wherein the disposable diaper is disposed in a region overlapping with the absorbent core and is disposed between the front end of the disposable diaper and the front end of the absorbent core and between the rear end of the disposable diaper and the rear end of the absorbent core, diaper. The absorbent article according to any one of claims 1 to 3, wherein a target portion to which the fastening tape is fixed is disposed in the front waist region,
And the rear end of the front waist elastic sheet is disposed adjacent to the front end of the target portion. The disposable diaper according to any one of claims 1 to 3, further comprising a top sheet disposed on the skin-contacting side of the disposable diaper,
Wherein the top sheet is disposed in a range from an area where at least the waist stretchable sheet is disposed to an end portion in the product longitudinal direction of the disposable diaper,
Wherein the top sheet is composed of a nonwoven fabric sheet having alternately a high basis weight portion and a low basis weight portion in the product width direction. The disposable diaper according to any one of claims 1 to 3, further comprising an outer sheet disposed on a surface of the disposable diaper on the non-skin side,
And a top sheet disposed on the skin-contacting side of the disposable diaper,
At least one of the top sheet and the outer sheet is composed of a nonwoven fabric sheet having no heat fusion point by point or line embossing or a nonwoven fabric sheet having an area ratio of 5% to 15% ,
Wherein the one of the top sheet and the outer sheet is disposed in a range from an area where at least the waist stretchable sheet is disposed to an end of the article in the longitudinal direction of the disposable diaper. The waist stretchable sheet according to any one of claims 1 to 3, wherein the waist stretchable sheet is bonded to a sheet disposed between the waist stretchable sheets through an adhesive,
Wherein the adhesive is intermittently applied. The disposable diaper according to any one of claims 1 to 3, wherein the thickness of the longitudinal end of the absorbent core is thinner than the thickness of the longitudinal center of the longitudinal length of the absorbent core.

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