KR20170122737A - Disposable diapers - Google Patents

Abstract

The center line O of the pair of fastening tapes 90 in the longitudinal direction L of the disposable diaper 10 is superimposed on the waist elastic stretchable portion 85 in the plane of the disposable diaper 10, And the length W1 of the waist portion stretchable and contractible portion 85 in the width direction W is longer than the length W2 of the absorbent body 40 in the width direction W And the elongation percentage of the region A positioned outside the absorbent body 40 in the width direction W in the waistel stretchable and contractible portion 85 is larger than that of the absorbent body 40 in the waist elastic stretchable portion 85 Is different from the elongation percentage of the region (B) located inside the width direction (W).

Description

Disposable diapers

The present invention relates to a disposable diaper.

BACKGROUND ART [0002] Conventionally, in a tape-type disposable diaper, there is known a technique of providing a waist elastic stretching portion that extends and contracts in a width direction around a waist of a wearer in order to maintain good fit of a wearer's waist.

Patent Document 1: JP-A-10-225481

However, in the above-described conventional disposable diaper, because the elasticity of the absorber inhibits elongation and contraction of the waist elastic stretching portion, the disposable diaper can not be pushed securely against the waist of the wearer, And the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a tape-type disposable diaper in which the fit of the waist of the wearer can be enhanced.

A first aspect of the present invention is summarized as a cushioning device comprising a front waist region, a rear waist region, and a crotch region located between the front waist region and the rear waist region, A pair of fastening tapes extending in the width direction in the rear waist region and fixed to the front waist region, the pair of fastening tapes having a longitudinal direction toward the region and a width direction orthogonal to the longitudinal direction, An absorbent body extending toward at least one of the front waist region and the rear waist region over a region between the pair of fastening tapes and a waist elastic stretchable portion stretchable and contractible in the width direction, The longitudinal centerline of the pair of fastening tapes, as seen from the plane of the disposable diaper, And the waist elastic stretchable portion is configured such that the length in the width direction is longer than the length in the width direction of the absorbent body, and the waist elastic stretchable portion The extension ratio of the region located on the outer side in the width direction with respect to the absorber is different from the extension rate of the region located on the inner side in the width direction with respect to the absorber in the waist elastic expanding and contracting portion .

1 is an exploded plan view of a disposable diaper according to the present embodiment.
2 is a sectional view of the disposable diaper taken along the line F1-F1 shown in Fig.
3 is a sectional view of the disposable diaper taken along the line F2-F2 shown in Fig.
Fig. 4 is a diagram schematically showing a mounting manner of the disposable diaper according to the present embodiment in a wearer. Fig. 4 (a) is a state in which the fastening tape is fixed to the front waist region and the wearer is lying. Fig. 4 (b) shows a state in which the fastening tape is fixed to the front waist region, to be.

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 components are denoted by the same or similar reference numerals. It should be noted, however, that the drawings are schematic and the proportions of the respective dimensions and the like are different from the reality.

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 the disposable diaper 10 according to the present embodiment. 2 is a sectional view of the disposable diaper taken along the line F1-F1 shown in Fig. 3 is a sectional view of the disposable diaper taken along the line F2-F2 shown in Fig. 1 is an exploded view of the leg elastic member 75 and leg elastic members 80 of the leg side stretchable and contractible portion 80 until the wrinkles of the top sheet 50 and the side flaps 70 constituting the disposable diaper are not formed, As shown in Fig.

1, 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 (or the like) of the wearer. The crotch region 25 is located between the front waist region 20 and the rear waist region 30.

In the disposable diaper 10, a pair of leg openings 35 are formed. The leg opening 35 is provided at the outer edge of the disposable diaper 10 (the outer edge in the width direction W) and is provided along the perimeter of the wearer with the disposable diaper 10 worn by the wearer It is the part to be placed.

In this embodiment, the direction from the front waist region 20 toward the rear waist region 30 is referred to as the longitudinal direction L, and the direction orthogonal to the longitudinal direction L Direction is referred to as a width direction (W).

The disposable diaper 10 has an absorbent body 40. The absorbent body 40 has an absorbent core 40a and a core wrap 40b. The absorbent core 40a extends from the crotch region 25 toward at least one of the front waist region 20 and the rear waist region 30 over the crotch region 25. [

The absorbent core 40a is the same as that of the conventional disposable diaper, and can be appropriately configured by using a known member or material such as pulverized pulp or a super absorbent polymer. The absorbent core 40a is surrounded by a sheet-like core wrap 40b. The core wrap 40b is a sheet that covers the absorbent core 40a. The rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b substantially coincide. More specifically, the distance between the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b is 5 mm or less.

The absorbent core 40a is formed with a lower unit weight region 110 having a lower weight of the absorbent material than other portions of the absorbent core 40a. The low unit weight region 110 is located at the center of the widthwise direction W of the rear edge of the absorbent core 40a. The width of the low-unit weight region 110 in the width direction W widens toward the rear end edge of the absorbent core 40a. More specifically, the low-unit weight region 110 is wedge-shaped as viewed from the plane of the disposable diaper 10. [

2 and 3, a liquid permeable top sheet 50 is provided on the surface side (skin facing surface side) of the absorbent body 40. As shown in Fig. In addition, a liquid-impermeable back sheet 60a is provided on the back side (non-skin-facing side) of the absorber 40. [ On the back side of the back sheet 60a, an external sheet 60 is provided.

As shown in Figs. 1 and 2, a side flap 70 is provided at the outer edge of the absorber 40, respectively. The side flaps 70 are disposed on the outer side of the front waist region 20, the crotch region 25 and the rear waist region 30 and also in the width direction W than the absorbent body 40.

The side flaps 70 are composed of one nonwoven fabric or a plurality of two or more nonwoven fabrics. 2, the side flaps 70 are positioned on the skin-facing surface side of the absorbent core 40a and extend outward in the width direction W than the absorbent core 40a.

2, the inner edge of the side flap 70 (the inner end in the width direction W) covers the absorbent core 40a and the outer edge of the side flap 70 covers the absorbent core 40a. And is disposed outside the width direction W.

1, the side flap 70 is provided with a pair of leg stretchable and contractible portions 75 which are arranged inside the width direction W of the leg opening 35 and extend and contract in the longitudinal direction L . The leg stretching and shrinking portion 75 may be configured so that the leg opening portion 35 can be stretched and contracted in the longitudinal direction L or may be disposed along the leg opening portion 35, Or may be arranged in an inclined state.

Here, as shown in Fig. 1, the pair of leg stretchable and contractible portions 75 may be configured so as to extend outward in the width direction W toward the rear waist region 30.

1, a pair of leg-side stretchable and contractible portions 80 extending along the longitudinal direction L are provided on the inner side of the width direction W of the pair of leg stretchable and contractible portions 75. As shown in Fig. The leg-side stretchable and contractible portion 80 is provided at an inner end portion in the width direction W of the side flap 70 and is a self-standing stretchable gusset.

The disposable diaper 10 is provided with a crotch stretchable and contractible portion 200 disposed in a region overlapping the absorbent body 40 in the crotch region 25. [ The crotch stretchable and contractible portion 200 is configured to be able to maintain a flat shape in a part of the crotch region 25 at the time of wearing the disposable diaper 10 than other portions of the absorbent body 40. [ The crotch stretchable and contractible portion 200 is configured to be stretchable in at least a longitudinal direction L or a width direction W. [

As shown in Fig. 1, a first notch 115 and a second notch 125 are formed in the absorbent core 40a of the crotch region. The first notch 115 and the second notch 125 are slits formed in the absorber 40. [ The slit is a portion where no absorbent material exists. The first notch 115 and the second notch 125 each have a notch shape extending from the outer edge of the absorbent core 40a toward the inside in the width direction W. [

The disposable diaper 10 may not have the crotch stretchable portion 200, the first cutout 115 and the second cutout 125. [

The pair of fastening tapes 90 are fixed to the non-skin facing surface of the front waist region 20 by extending along the width direction W in the rear waist region 30 as a pair, 10 to the wearer's body.

The fastening tape 90 is attached to the area of the side flap 70 corresponding to the rear waist region 30. [ Each of the fastening tapes 90 includes a base sheet 91 connected to the side flaps 70 and a hook sheet 90 fixed to the base sheet 91 by being provided with engagement hooks (not shown) (92). The hook sheet 92 is an area provided with an engaging member.

1, the absorbent core 40 (or the absorbent core 40a) is disposed on the inner side in the longitudinal direction L of the hook sheet 92 from the end 92E1 on the inner side in the longitudinal direction L of the hook sheet 92 As shown in Fig.

The target portion 95 is provided on the surface of the outer sheet 60 on the non-skin-facing side in the front waist region 20. The target portion 95 is configured to catch the engagement hook of the fastening tape 90 and functions as a loop of the hook and loop engagement system.

As the target portion 95, for example, an air through nonwoven fabric can be used. The disposable diaper 10 may be configured such that the fastening tape 90 is fixed to the outer sheet 60 in the front waist region 20 without the target portion 95. [

1 and 2, between the pair of fastening tapes 90 in the width direction W, there is provided a waist elastic stretchable portion 85 which is stretchable in the width direction W. As shown in Fig. The waist elastic stretching portion 85 is configured to contract between the fastening tapes 90 in the width direction W. [

In the present embodiment, the waist elastic portion 85 is formed of a stretchable sheet. The waist elastic expanding and contracting portion 85 is a portion that is substantially stretchable in the width direction W and removes a portion where the stretchable sheet is disposed in a state in which the stretching force is not exerted. Therefore, the outer edge of the waist elastic member 85 described later is not the outer edge of the stretchable sheet, but the outer edge of the stretchable and contractible portion.

In the disposable diaper 10 according to the present embodiment, a stretchable film having a unit weight of 20 to 45 g / m 2 is used as the waist elastic stretching portion 85. However, the waistline stretchable and contractible portion 85 may be constituted by other structures such as a plurality of lines of thread rubber. The waist elastic member 85 is stretched at a predetermined magnification with respect to the length in the non-stretched state (natural state), and then adhered to the outer sheet 60 by hot melt adhesive, heat treatment or the like.

The waist elastic expanding and contracting portion 85 is extended from the center of the width direction W of the disposable diaper 10 toward both outer sides in the width direction W and is formed by a continuous sheet extending in the width direction W Consists of. The rear end edge (the outer end portion in the longitudinal direction L) 85E2 of the waist elastic expanding portion 85 is located in front of the rear end edge 10E2 of the disposable diaper 10. The rear edge 85E2 of the waist elastic member 85 may coincide with the rear edge 10E2 of the disposable diaper 10. [

The front end edge 85E1 of the waist elastic expanding and contracting portion 85 is located forward of the rear end edge 40E2 of the absorbent body 40 (or the absorbent core 40a and the core wrap 40b) Is located on the rear side of the rear end edge 75E2 of the front end portion 75 of the second arm 75. [ Therefore, at least a part of the waist elastic expanding / contracting portion 85 is configured to be superimposed on the absorbent body 40 (or the absorbent core 40a) when viewed from the plane of the disposable diaper 10.

Here, the thickness of the absorber 40 in the region overlapping the waist elastic portion 85 may be made thinner than the thickness of the absorber 40 in other regions.

The waist elastic stretchable and contractible portion 85 is formed to extend along the rear edge of the absorbent core 40 (or the absorbent core 40a and the core wrap 40b) (I.e., the wrap 40b).

The outer edge 85WO of the waist elastic portion 85 is positioned inside the widthwise direction W of the inner edge of the fastening tape 90 (the inner edge in the width direction W). The waist-opening stretchable and contractible portion 85 and the fastening tape 90 are spaced apart in the width direction W.

1, the waist elastic expanding / contracting portion 85 includes a first region 851 extending inward in the width direction W from both outer edges 85WO of the waist elastic expanding / contracting portion 85, A second area 852 extending from the inner edge 851WI of the first area 851 toward the inside of the width direction W and a width area W extending from the inner edge 852WI of the second area 852, And a third region 853 extending toward the inside of the second region 853.

The first area 851, the second area 852, and the third area 853 are continuous in the width direction W. [ Therefore, there is no non-stretchable area between the first area 851 and the second area 852 and between the second area 852 and the third area 853 that does not expand and contract in the width direction W. [ The inner edge 851WI of the first area 851 coincides with the outer edge 852WO of the second area 852 and the inner edge 852WI of the second area 852 coincides with the outer edge 852WO of the second area 852, 853, respectively.

The first region 851, the second region 852, and the third region 853 are configured to have different elongation ratios in the width direction (W). Specifically, the elongation percentage of the second region 852 in the width direction W is lower than the elongation percentage of the first region 851 in the width direction W. [ The extension ratio of the third region 853 in the width direction W is higher than the extension ratio in the width direction W of the second region 852. [

The relationship between the extension ratio in the width direction W of the first area 851 and the extension ratio in the width direction W of the third area 853 may be the same or higher. It is preferable that the elongation percentage of the third region 853 in the width direction W is higher than the elongation percentage in the width direction W of the first region 851. [

The outer edge 851WO of the first region 851 is located outside the widthwise direction W of the outer edge of the absorbent core 40a. The inner edge 851WI of the first region 851 is located inside the width direction W than the outer edge of the absorbent core 40a. Therefore, the first region 851 is disposed over the outer edge of the absorbent core 40a.

At least a part of the first region 851 may be located outside the width direction W of the absorbent core 40a and the inner edge of the first region 851 may be located at the outer edge of the absorbent core 40a The inner edge of the first region 851 may be aligned with the outer edge of the absorbent core 40a.

The second area 852 is located between the first area 851 and the third area 853. It is preferable that the second area 852 is disposed inside the width direction W of the outer edge of the absorbent core 40a.

The third region 853 is disposed over the center of the width direction W of the disposable diaper 10. Preferably, the third region 853 overlaps at least a portion of the low-weight area 110 as viewed in plan view of the disposable diaper 10.

In the disposable diaper 10 according to the present embodiment, the waist elastic expanding and contracting portion 85 has a center line passing through the center of the width direction W of the disposable diaper 10 and extending in the longitudinal direction L, And may be asymmetric.

For example, both of the left and right first areas 851 may extend over the outer edge of the absorbent core 40a, and one of the first areas 851 may extend over the outer edge of the absorbent core 40a. Both of the left and right second regions 852 may be disposed inside the width direction W than the outer edge of the absorbent core 40a and one of the second regions 852 may be disposed inside the absorbent core 40a Or may be disposed on the inner side of the widthwise direction W than the outer edge of the outer side edge portion

The disposable diaper 10 according to the present embodiment may be provided with an area having an elongation lower than the elongation of the first area 851 outside the first area 851 in the width direction W. [

As shown in Fig. 3, the waist elastic expanding and contracting portion 85 is located on the non-skin facing side of the absorbent core 40a. In the present embodiment, the waist elastic member 85 is disposed between the outer sheet 60 and the back sheet 60a.

However, in the configuration in which the core lap 40b extends outward in the longitudinal direction L from the absorbent core 40a, the waist elastic stretchable and contractible portion 85 is in contact with the core lap 40b and the back sheet 60a or And may be disposed between the outer sheets 60. [

The position of the waist elastic portion 85 is not particularly limited. 2, the waist elastic expanding and contracting portion 85 is provided between the side flap 70 and the back sheet 60a or the external sheet 60 in the region where the absorber 40 is not disposed, Or may be disposed.

1, the center line O of the pair of fastening tapes 90 in the longitudinal direction L is superimposed on the waist elastic stretching portion 85 as seen from the plane of the disposable diaper 10, (Not shown).

The length W1 of the waist portion stretchable portion 85 in the width direction W is equal to the length W2 of the absorbent core 40 in the width direction W ) Of the first and second guide grooves.

The elongation percentage of the waist-surrounding stretchable and contractible portion 85 in the region A located outside the absorbent core 40 (or the absorbent core 40a) Of the absorbent core 40 (or the absorbent core 40a) in the width direction W of the absorbent core 40 (or the absorbent core 40a).

1, the region A is located on the outer side of the width direction W than the imaginary line VL1, and the region B is located on the outer side of the imaginary line VL1 in the width direction W As shown in Fig. The imaginary line VL1 extends from the outer edge of the absorbent body 40 along the longitudinal direction L to the rear end of the disposable diaper 10 at the portion of the absorbent body 40 having the longest width direction W And extends to the edge 10E2.

For example, in the waist elastic stretching part 85, the stretching ratio of the area A located outside the absorbent body 40 (or the absorbent core 40a) in the width direction W is larger than the stretching ratio of the waist elastic stretching part 85, Of the absorbent core 40 (or the absorbent core 40a) in the waist-surrounding stretchable and contractible portion 85 may be larger than the stretchability of the region B located inside the widthwise direction W of the absorbent core 40 May be configured to be smaller than the elongation percentage of the region (B) located on the inner side in the width direction (W) than the absorbing core (40) (or the absorbent core (40a)

1, the waist elastic expanding and contracting portion 85 and the pair of leg stretchable and contractible portions 75 may be configured so as not to overlap with each other when viewed from a plane of the disposable diaper 10.

On the other hand, as shown in Fig. 1, the waist elastic stretching portion 85 and the pair of leg side stretchable and contractible portions 80 may overlap each other when viewed from the plane of the disposable diaper 10.

1, an inner end portion (front end edge) 85E1 of the waist portion stretchable and contractible portion 85 in the longitudinal direction L is formed so as to extend inwardly in the longitudinal direction L of the hook sheet 92 Or may be disposed on the inner side of the longitudinal direction L than the side surface 92E1.

1, the rear end edge 85E2 of the waist elastic expanding and contracting portion 85 is located on the outer side in the longitudinal direction L from the end 92E2 on the outer side in the longitudinal direction L of the hook sheet 92 As shown in Fig.

In the disposable diaper 10 according to the present embodiment, the waist elastic expanding and contracting portion 85 is configured to expand and contract in the width direction W, And may be configured to expand and contract in the longitudinal direction L.

In addition, the waist elastic portion 85 and the absorbent body 40 are bonded together with an adhesive. The adhesives for bonding the waist elastic portion 85 and the absorbent body 40 are arranged in a plurality of rows continuously in the longitudinal direction L and the respective rows are arranged so as to overlap each other in the width direction W. [

Specifically, the adhesive has a structure in which a plurality of spiral shapes continuous in the longitudinal direction L are arranged and the rows overlap each other in the width direction W, or a structure in which the width of the spiral shape is increased in the width direction W, L are arranged in a plurality of rows, and the rows are overlapped in the width direction W, and the like.

In the disposable diaper 10 according to the present embodiment, the waist elastic expanding and contracting portion 85 and the absorbent core 40a are not directly joined but indirectly joined to each other through the back sheet 60a and the core wrap 40b Respectively.

An adhesive for bonding the back waist elastic portion 85 to the back sheet 60a and an adhesive for bonding the back sheet 60a and the core wrap 40b and an adhesive for bonding the core wrap 40b and the absorbent core 40a , And the longitudinal direction (L), and each column is arranged so as to be overlapped in the width direction (W).

The " elongation percentage " in the present specification means the degree of elongation and is measured according to the following measuring method.

First, when the disposable diaper 10 is sealed in a package or the like, the disposable diaper 10 is taken out from the package.

Secondly, the arrangement region of the stretchable sheet constituting the waistelly stretchable and contractible portion 85 is cut off, and a sample to be measured is prepared. Such a sample is allowed to stand for 24 hours in an atmosphere of 20 占 폚 占 2 占 폚 and relative humidity of 60% 占 5% RH is referred to as " natural state ".

Third, in such a natural state, between the end (front end) of the elastic sheet on the absorbent core 40a side and the end (rear end) of the stretch sheet on the waist opening side, that is, So that points (marks) are intermittently applied along the width direction W. In this respect, from the reference, the center of the width direction W of the stretchable sheet is referred to as a point (mark) from the reference to the end of the width direction W of the sample of the stretchable sheet at intervals of 5 mm on both sides of the width direction W ).

Fourth, the distance between adjacent points is measured. Let this distance be the length of the natural state (it is 5 mm because it is marked with an interval of 5 mm).

Fifth, a distance between the above-mentioned marks is measured from a natural state when the wrinkles caused by the elastic members are stretched to a state in which the wrinkles can not be visually confirmed on the stretchable sheet.

Sixth, the elongation percentage is calculated by the following formula: elongation rate (times) of each region = (distance between display of elongation state) / (distance between display of natural state).

(2) Manufacturing Method of Disposable Diaper (10)

Next, an example of a manufacturing method of the disposable diaper 10 according to the present embodiment will be described. For the method not described in the present embodiment, an existing method can be used. The manufacturing method described below is merely an example, and the manufacturing method according to another manufacturing method may also be used. The method of manufacturing the disposable diaper 10 includes at least a component forming step, a component placing step, a leg-hole forming step, and a cutting step.

In the constituent part forming step, constituent parts constituting the disposable diaper 10 are formed. Concretely, for example, the absorber 40 is formed by laminating the absorbing material, or the fastening tape 90 is formed.

In the constituent component placement step, a stretchable sheet constituting the waist elastic member 85, another web such as a web constituting the top sheet 50, a leak-barrier sheet, The disposable diaper 10 such as the absorbent body 40 and the leg stretchable and contractible portion 75 is disposed.

As a method for changing the extension ratio of the waist elastic member 85, for example, the following methods can be mentioned.

The waist elastic stretchable and contractible portion 85 is stretched by the gear in the width direction W before the waist elastic stretchable portion 85 is joined to the back sheet 60a or the like.

When stretching by such a gear, the gear stretching of a region (for example, the second region 852) in which the elongation is low is weakened. (For example, the first region 851 or the third region 853) to be increased in elongation. The strength of the gear extension can be adjusted by changing the depth of the convex portion of the gear, the pitch of the convex portion of the gear, and the number of times of gear drawing. The elongation percentage of the strongly stretched region is relatively high and the elongation percentage of the slightly stretched region is relatively low.

The leg circumference forming process cuts the top sheet 50, the outer sheet 60, and the back sheet 60a. Thereby, the leg openings 35 disposed around the wearer's legs are formed.

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

(3) Action / effect

In the disposable diaper 10 according to the present embodiment, the length W1 of the waist expanding and contracting portion 85 in the width direction W is larger than the width W1 of the absorbent core 40 (or the absorbent core 40a) The center line O in the longitudinal direction L of the fastening tape 90 is longer than the length W2 of the waist elastic stretching portion 85 as viewed from the plane of the disposable diaper 10 When the fastening tape 90 is pulled by the attachment aide at the time of attaching the disposable diaper 10, it is possible to prevent the disposable diaper 10 from being damaged by the rigidity of the absorbent body 40 It is possible to relieve the disadvantage that the stretching and shrinking of the waist-surrounding stretchable and contractible portion 85 is prevented. Therefore, the disposable diaper 10 can be reliably fitted around the waist of the wearer.

Fig. 4 schematically shows a mounting manner of the disposable diaper 10 to a wearer. 4 (a) is a state in which the fastening tape 90 is fixed to the front waist region 20 and the wearer is lying there. FIG. 4 (b) shows the fastening tape 90 in the front waist region (20) and the wearer is standing still.

When the tape-type disposable diaper 10 is attached to the wearer, the attachment aide places the wearer's back on the back waist region 30 of the disposable diaper 10 and moves the fastening tape 90 in the width direction The fastening tape 90 is fixed to the front waist region 20 by pulling out the tape W outward. 4 (a), in such a case, the body pressure of the wearer is applied to the rear waist region 30 of the disposable diaper 10.

In this case, a force generated when the fastening tape 90 is pulled out of the fastening tape 90 in the width direction W is absorbed by the absorbent core 40 (the absorbent core 40a) in the waist elastic stretchable and contractible portion 85, The gap between the wearer and the disposable diaper 10 is likely to occur when the wearer stands up after the disposable diaper 10 is mounted because it does not reach the region B located inside the width direction W. [ .

Here, in the disposable diaper 10 according to the present embodiment, the waist elastic stretchable portion 85 has a region (hereinafter referred to as the absorbent core 40a) located outside the absorbent core 40 (or the absorbent core 40a) A of the absorbent core 40a is configured to be larger than the elongation percentage of the region B located inside the width direction W of the absorbent core 40 (absorbent core 40a) in the waist elastic expanding and contracting portion 85, The region B is stretched in the width direction W by the region A having an elongation greater than the region B and stretched so that the wearer and the disposable diaper 10 can be stretched in the width direction W. [ There is a possibility that a gap may be generated between the first electrode and the second electrode.

On the other hand, in the disposable diaper 10 according to the present embodiment, in the waist elastic stretchable portion 85, a region (the absorbent core 40a) located outside the width direction W A of the absorbent core 40a is smaller than the elongation percentage of the region B located inside the width direction W of the absorbent core 40 (absorbent core 40a) in the waist elastic expanding and contracting portion 85, Even when the fastening tape 90 is pulled with a weak force when the disposable diaper 10 is attached to the wearer, the stretching amount in the width direction W of the region A becomes large, The region B is stretched in the width direction W by the region A and elongated so that a gap is formed between the wearer and the disposable diaper 10 It is possible to solve the problem that there is a possibility of occurrence.

Since the waist elastic stretching portion 85 and the pair of leg stretchable and contractible portions 75 are not overlapped with each other when viewed from a plane of the disposable diaper 10 according to the present embodiment, , It is possible to avoid a situation in which the waist elastic stretchable portion 85 is pulled inward in the longitudinal direction L so as to follow the movement of the wearer's leg so that the waist stretchable portion 85 is not reliably pushed around the wearer's waist.

The disposable diaper 10 according to the present embodiment is configured such that the waist elastic stretchable portion 85 and the pair of leg side stretchable and contractible portions 80 overlap each other when viewed from the plane of the disposable diaper 10 according to the present embodiment, It is possible to suppress the situation in which the wearer's body and the disposable diaper 10 are separated from each other.

The waist elastic expanding and contracting portion 85 and the absorbent body 40 (or the absorbent core 40a) are configured so as to overlap each other when viewed from the plane of the disposable diaper 10 according to the present embodiment. Such that the thickness of the absorbent body 40 (or the absorbent core 40a) in the region where the absorbent core 40 is overlapped with the absorbent core 40 (or the absorbent core 40a) The absorbent body 40 (or the absorbent core 40a) is pressed by the waist elastic stretchable portion 85 to improve fitability with the wearer.

In the disposable diaper 10 according to the present embodiment, the absorbent core 40 (or the absorbent core 40a) is positioned in the longitudinal direction L of the hook sheet 92 in the longitudinal direction L It is possible to more reliably reduce the influence on the area B of force generated when the fastening tape 90 is pulled outward in the width direction W. Further,

In the disposable diaper 10 according to the present embodiment, the inner end portion (front end edge) 85E1 of the waist portion stretchable and contractible portion 85 in the longitudinal direction L corresponds to the longitudinal direction L And the outer end (rear end edge) 85E2 of the waist elastic stretchable portion 85 in the longitudinal direction L is disposed on the inner side of the longitudinal direction L of the hook sheet 92 of the fastening tape 90 is located outside the end portion 92E2 of the fastening tape 90 outside the longitudinal direction L of the fastening tape 90. Therefore, The stretchable and contractible portion 85 of the waist-surrounding stretchable and contractible portion 85 can be effectively influenced and the fitability of the waistline stretchable and contractible portion 85 to the wearer can be improved.

In the disposable diaper 10 according to the present embodiment, since the pair of leg stretchable and contractible portions 75 are configured to extend outward in the width direction W as they face the rear waist region 30, It is possible to disperse the force that the waist elastic expanding and contracting portion 85 is stretched in the longitudinal direction L outward in the width direction W after the disposable diaper 10 is mounted.

Generally, the body of the wearer is placed so as to cover the entire width of the absorbent core 40a at the time of wearing. Therefore, when the fastening tape 90 is stretched, the portion located outside the width direction W of the wearer's body, that is, the region outside the absorbent core 40a in the width direction W is stretched.

For example, if it is difficult to elongate the portion where the fastening tape 90 is stretched, the mounting assistant can not grasp to what extent the fastening tape 90 should be stretched, so that it may not be fixed at the correct position.

However, since the first region 851 having a relatively high elongation is disposed outside the absorbent core 40a in the width direction W, the attaching assistant stretches the first region 851 to form the fastening tape 90 are fixed. Since the first area 851 is easy to extend, the mounting assistant can easily grasp the range in which the first area 851 can be stretched. Therefore, the mounting assistant can grasp the range of stretching the fastening tape 90 and fix the fastening tape 90 to the correct position.

In fixing the fastening tape 90, the first area 851 is disposed at a position in contact with the waist bone next to the wearer. On the other hand, when securing the fastening tape 90, the second region 852 and the third region 853 are in a state in which it is difficult to stretch and contract due to the body pressure of the wearer.

However, the body pressure applied to the rear waist region 30 of the disposable diaper 10 is reduced after the disposable diaper 10 is attached to the wearer, for example, in a state where the wearer is raised. The first region 851, the second region 852, and the third region 853 are interlocked with each other as shown in Fig. 4 (b), when the body pressure of the wearer applied to the rear waist region 30 is reduced The second area 852 and the third area 853 expand and contract respectively with the first area 851 as a starting point.

Specifically, the first area 851 is already stretched when the fastening tape 90 is mounted, as compared with the second area 852 and the third area 853. When the second region 852 and the third region 853 are expanded and contracted in this state, the second region 852 having a relatively low elongation percentage with the first region 851 as a starting point is moved toward the first region 851 And the third region 853 having a relatively high elongation is stretched to the inside of the second region 852 in the width direction W and the second region 852 is elongated.

At this time, since the first area 851 is positioned on the fastening tape 90 side, the fastening tape 90 is stretched when the fastening tape 90 is fixed to the target portion 95. At this time, since there is a third region 853 which is less likely to elongate inward than the second region 852 in the width direction W, the first region 851 and the third region 853, which are sandwiched by the first region 851 and the third region 853, The second area 852 is easily extended evenly in the width direction W. As a result, the second area 852 can equally be fitted to the body without tightening the baby's body with a weak force.

By disposing the disposable diaper 10 on the wearer's body in this way, the first region 851 strongly fits the waist bone of the wearer's side. In addition, the back side of the wearer's lower back bone has less back bone, and the wearer's body is relatively soft. In the portion where the lower back bone is small, the second region 852 fits slightly. The body of the wearer strongly fits the relatively hard region and the wearer's body softly fits the relatively soft region so that the fit of the wearer can be comfortably applied and the fitability of the waistline can be enhanced. In other words, in order to prevent the leakage of the excrement without making a gap between the disposable diaper 10 and the wearer's body, which is originally intended by the mother (helper) (To strengthen the tightening force) is preferable to the construction of the present invention.

The third region 853 is disposed over the center of the width direction W of the disposable diaper 10. The center of the back of the wearer is arranged with the backbone, and the back side is more distant than the right and left side parts. Such a hum region (Rhombus of Michaelis) is depressed in the clavicle portion, and a third region 853 is disposed in this hum region. In Fig. 4 (a), this bulb area is indicated by " CR ".

After the disposable diaper 10 is mounted, when the body pressure is reduced, the third region 853 contracts while stretching the second region 852. This shrunk portion can be placed on the wearer's shoulder area. Therefore, the disposable diaper 10 can be fitted to the entire waist circumference by suppressing the gap between the center of the wearer's back and the disposable diaper 10.

In addition, since there is a difference in thickness between the absorbent core 40a and the front and rear edges of the rear end of the absorbent core 40a, a clearance is likely to be formed between the wearer's body and the disposable diaper 10. However, since the rear end edge of the waist elastic expanding / contracting portion 85 extends beyond the rear end edge of the absorbent core 40a to the waist side and the elongation percentage of the third region 853 is relatively high, It is possible to more reliably prevent leakage.

Since the absorbent core 40a has a relatively higher rigidity than the other member (top sheet 50) constituting the disposable diaper 10, it is difficult to arrange the absorbent core 40a along the wearer's body. However, since at least a part of the waist elastic expanding and contracting portion 85 is superimposed on the absorbent core 40a and the waist elastic expanding and contracting portion 85 is disposed on the non-skin facing side of the absorbent core 40a, The absorbent core 40a can be fit to the wearer's body by the contraction of the stretchable and contractible portion 85. [

When the third region 853 is disposed in the entire area in the width direction W of the absorbent core 40a and the width of the absorbent core 40a in the natural state is excessively shortened due to the contraction of the third region 853 . As a result, when the fastening tape 90 is fixed, the width of the disposable diaper 10 can not be ensured, which makes it difficult for the attaching assistant to hold the fastening tape 90, which may deteriorate the attachability.

However, since the second area 852 is located inside the width direction W than the outer edge of the absorbent core 40a, the second area 852 and the second area 852 are formed within the entire area in the width direction W of the absorbent core 40a. A third region 853 is disposed. Therefore, the width of the absorbent core 40a in the natural state is not excessively shortened, and deterioration of the attachability can be suppressed.

The inner edge of the first region 851 is located inside the width direction W of the outer edge of the absorbent core 40a. When the fastening tape 90 is pulled and mounted, the mounting assistant fixes the fastening tape 90 by stretching the first area 851. Further, when the fastening tape 90 is fixed by extending the first area 851, the absorbent core 40a is disposed under the wearer's body, and the body pressure is applied. Since the inner edge of the first region 851 is disposed on the inner side in the width direction W than the outer edge of the absorbent core 40a, the inner edge of the absorbent core 40a is in contact with the fastening tape 90, So that it is difficult to move under the wearer's body. Therefore, when the fastening tape 90 is stretched when the inner edge of the first area 851 is positioned inside the width direction W than the outer edge of the absorbent core 40a, The inner edge of the first region 851 becomes a starting point, and the first region 851 can be easily stretched.

The adhesives for bonding the waist elastic portion 85 and the absorbent core 40a may be arranged in a plurality of rows successively in the longitudinal direction L and the rows may be overlapped in the width direction W. [ The waist elastic stretchable portion 85 and the absorbent core 40a can be continuously bonded in the longitudinal direction L and the widthwise direction W so that the waist elastic stretchable portion 85 can be stuck to the absorbent core 40a from being floated.

The elongation percentage of the third region 853 in the width direction W may be higher than the elongation percentage of the first region 851 in the width direction W. [ According to such a configuration, since the elongation percentage of the third region 853 is higher than that of the first region 851, the body pressure applied to the rear waist region 30 is reduced after the fastening tape 90 is fixed The second region 852 is stretched to the third region 853 side. Therefore, the portion contracted by the third region 853 can be collected at the depression of the back of the wearer.

The third region 853 overlaps with at least a portion of the low-weight region 110 as viewed from the plane of the disposable diaper 10. The third region 853 contracts the low unit weight region 110 in the width direction W and the rear end edge of the absorbent core 40a is deformed toward the center of the width direction W. [ Therefore, the rear portion of the absorbent core 40a can be formed into a cup shape. Such a cup-shaped absorbent core 40a can cover the wearer ' s buttocks, thereby further improving the padding around the waist.

The rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b substantially coincide with each other and the waist elastic stretchable and contractible portion 85 is formed by the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b, As shown in Fig. For example, if the core lap 40b extends rearward beyond the absorbent core 40a, the elasticity of the waist elastic stretchable portion 85 may be hindered by the core lap 40b. However, since the waist-surrounding stretchable and contractible portion 85 extends beyond the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b, the rear end edge of the absorbent core 40a and the rear end edge of the core wrap 40b The core wrap 40b or the like does not hinder the elongation and contraction of the waist-surrounding stretchable and contractible portion 85 on the rear side from the rear edge.

The side flap 70 at the rear end edge of the disposable diaper 10 is provided with the waist elastic stretchable portion 85 at the rear end edge of the disposable diaper 10, And a groove cutout is formed inside the longitudinal direction (L).

More specifically, the rear edge of the side flap 70 is inclined inward in the longitudinal direction L in a certain range extending from the outer edge of the side flap 70 to the inside in the width direction W . In other words, the outer edge of the side flap 70 is inclined inward in the width direction W in a certain range extending from the rear edge of the side flap 70 to the inside in the longitudinal direction L.

In this way, since the rear edge of the disposable diaper 10 is constituted, peeling at the rear edge of the disposable diaper 10 can be suppressed, and the waist of the wearer can be more reliably covered.

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, embodiments and operational techniques become apparent to those skilled in the art. Accordingly, the technical scope of the present invention is determined only by the inventive matters according to the appropriate claims from the above description.

Further, the entire contents of Japanese Patent Application No. 2015-038605 filed on February 27, 2015, which is incorporated herein by reference, is incorporated herein by reference.

According to the present invention, it is possible to provide an absorbent article which can be folded at a stable position and downsized.

10 ... Disposable diapers
20 ... Front waist region
25 ... Crotch area
30 ... Rear waist region
35 ... Leg-opening
40 ... Absorber
40a ... Absorbent core
40b ... Cover sheet
50 ... Top sheet
60 ... Outer sheet
60 ... Back sheet
70 ... Side flap
75 ... Leg extension part
80 ... Leg side stretch
85 ... Waist circumference stretching part
851 ... The first region
852 ... The second region
853 ... The third region
90 ... Fastening tape
110 ... Low unit weight area
115 ... 1st cut
125 ... 2nd cut
200 ... Crotch elastic part
L ... Lengthwise
W ... Width direction

Claims (8)

A front waist region, a rear waist region, and a crotch region located between the front waist region and the rear waist region,
A longitudinal direction from the front waist region toward the rear waist region and a width direction orthogonal to the longitudinal direction,
A pair of fastening tapes extending along the width direction in the rear waist region and fixed to the front waist region,
An absorbent body extending toward one or both of the front waist region and the rear waist region over the crotch region;
And a waist elastic stretchable portion disposed between the pair of fastening tapes and extending and contracting in the width direction,
The longitudinal centerline of the pair of fastening tapes in the plane of the disposable diaper is overlapped with the waist elastic stretchable portion and configured so as not to overlap with the absorbent body,
The length in the width direction of the waist elastic expanding and contracting portion is configured to be longer than the length in the width direction of the absorbing body,
The elongation percentage of the region located on the outer side in the width direction of the absorbent body in the waistline stretchable and contractible portion is different from the elongation percentage of the region located inward of the absorbent body in the lateral direction in the waist elastic stretchable portion ,
The waist elastic expanding and contracting portion and the absorbent body are configured so as to overlap each other when viewed from a plane of the disposable diaper,
And the thickness of the absorbent body in the region overlapping with the waist elastic stretching portion is made thinner than the thickness of the absorbent body in the other region. The method according to claim 1,
The elongation percentage of the region located on the outer side in the width direction with respect to the absorber is larger than the elongation percentage of the region located on the inner side in the width direction with respect to the absorber in the waist elastic stretchable portion Wherein the disposable diaper is a disposable diaper. 3. The method according to claim 1 or 2,
A pair of leg openings,
And a pair of leg stretchable and contractible portions which are disposed inside the width direction and are stretchable in the longitudinal direction than the pair of leg opening portions,
Wherein the waist elastic stretching portion and the pair of leg stretching portions are not overlapped with each other when viewed from a plane of the disposable diaper. The method of claim 3,
And a pair of leg-side stretchable and contractible portions extending in the longitudinal direction on an inner side in the width direction of the pair of leg elastic members,
Wherein the waist elastic stretching portion and the pair of leg side stretching portions are overlapped with each other when viewed from a plane of the disposable diaper. 3. The method according to claim 1 or 2,
And a side flap extending outward in the width direction from the absorbent body,
Wherein each of the pair of fastening tapes comprises a base sheet connected to the side flap and a hook sheet provided with an engagement hook and fixed to the base sheet,
Wherein the absorbent body is disposed inside the longitudinal direction of the hook sheet more inward than the end inward in the longitudinal direction of the hook sheet. 3. The method according to claim 1 or 2,
And a side flap extending outward in the width direction from the absorbent body,
Wherein each of the pair of fastening tapes comprises a base sheet connected to the side flap and a hook sheet provided with an engagement hook and fixed to the base sheet,
Wherein an end portion of the waist-surrounding stretchable portion in the longitudinal direction is disposed inside the longitudinal direction of the hook sheet than an end portion in the longitudinal direction of the hook sheet,
Wherein an end portion of the waist-surrounding stretchable and contractible portion in the longitudinal direction is disposed on an outer side in the longitudinal direction than an end portion in the longitudinal direction of the hook sheet. The method of claim 3,
Wherein the pair of leg stretchable and contractible portions are configured to extend outward in the width direction toward the rear waist region. 3. The method according to claim 1 or 2,
The waist-
A first region extending from both outer edges of the waist elastic expanding and contracting portion toward the inside in the width direction,
A second region extending from an inner edge of the first region toward an inner side in the width direction and having an elongation lower than that of the first region,
And a third region extending from an inner edge of the second region toward an inner side in the width direction and having an elongation higher than that of the second region,
And a part or the whole of the first region is configured to be located outside the width direction of the absorbent body.

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