KR101735791B1 - Disposable nappy - Google Patents

Abstract

The disposable diaper (10) of the present invention has a waist elastic stretchable portion (85) arranged between a pair of fastening tapes. The waist elastic expanding and contracting portion 85 extends toward both outer sides in the width direction from the center in the width direction of the disposable diaper. The waist elastic expanding and contracting portion 85 includes a first region 851 extending inward in the width direction from both outer edges of the waist elastic expanding and contracting portion and a second region 851 extending inward in the width direction from the inner edge of the first region, A second region 852 having an elongation lower than that of the first region and a third region 853 extending toward the inner side in the width direction from the inner edge of the second region and having an elongation percentage higher than that of the second region. At least a part of the first region is located on the outside in the width direction of the absorbent core.

Description

Disposable diapers {DISPOSABLE NAPPY}

The present invention relates to a disposable diaper.

BACKGROUND ART [0002] A tape-type disposable diaper is conventionally known, which keeps the wearer's fit around the waist well. The disposable diaper disclosed in Patent Document 1 has a plurality of elastic regions stretching in the width direction around the wearer's waist. A plurality of the elastic regions are provided between the pair of fastening tapes at intervals in the width direction. The plurality of elongating and contracting regions are configured to have different elongation ratios.

Japanese Patent Specification No. 2007-530166

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

In the disposable diaper disclosed in Patent Document 1, since the elongating and contracting regions are disposed with an interval in the width direction, the adjacent elongating and contracting regions do not interlock with each other. Therefore, the respective elastic regions are independently contracted, and the disposable diaper can not be appropriately fitted over the entire waist circumference.

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 capable of improving the fit around the waist.

The disposable diaper (disposable diaper 10) according to the present disclosure has a front body circumferential region (front waist region 20) and a rear waist region (rear waist region 30) (Crotch region) (crotch region 25) located between the front waist region and the rear waist region, and a region extending from the front waist region to the rear waist region (Width direction W) orthogonal to the longitudinal direction and extending along the width direction in the rear waist region and fixed to the front waist region A pair of fastening tapes (fastening tape 90) to which the absorbent core is attached and an absorbent core (absorbent core) extending toward at least one of the front waist region and the rear waist region over the crotch region Core 40a), the pair of fastening Tee And a waist elastic stretchable portion (waist elastic stretchable portion 85) disposed between the waist elastic stretchable portion and the waist elastic stretchable portion, wherein the waist elastic stretchable portion is disposed between the waist elastic stretchable portion (The first region 851) extending inward in the width direction from both outer edges of the waist elastic expanding and contracting portion, and a second region (second region) A second region (second region 852) extending inward in the width direction from the first region and having an extension lower than that of the first region, and a second region extending from the inner edge of the second region toward the inside in the width direction, (Third region 853) having an elongation percentage higher than that of the second region, and at least a part of the first region is located outside in the width direction of the absorbent core And that as a base.

According to the present disclosure, it is possible to provide a tape-type disposable diaper capable of increasing the fit of the waist.

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.
4 is a diagram schematically showing an embodiment in which the disposable diaper according to the present embodiment is mounted on a wearer. Fig. 4 (a) shows a state in which the fastening tape is fixedly attached to the front waist region and the wearer is lying down. Fig. 4 (b) shows a state in which the fastening tape is fixedly attached to the front waist region, It is in a state of work.

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. However, it should be noted that the drawings are schematic, and the ratios of the respective dimensions and the like are different from those of the real world.

Therefore, specific dimensions and the like should be judged based on the following description. In addition, even in the drawings, parts having different dimensions or relative proportions may be included.

(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 stretchable and contractible portion 75 and 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.

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 disposable diaper 10, a pair of leg openings 35 are formed. The leg openings 35 are provided at lateral end portions in the 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.

In the present embodiment, a direction from the front waist region 20 to the rear waist region 30 is referred to as a longitudinal direction L, and a direction orthogonal to the longitudinal direction L is referred to as a lateral 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 over the crotch region 25 and extends from the crotch region 25 toward at least one of the front waist region 20 and the rear waist region 30. [

The absorbent core 40a is similar to that of a conventional disposable diaper, and can be suitably constructed using known members or materials such as pulverized pulp and a high absorbent polymer. The absorbent core 40a is wrapped 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 and the rear end edge of the core wrap substantially coincide. More specifically, the distance between the rear end edge of the absorbent core and the rear end edge of the core wrap is 5 mm or less.

The absorbent core 40a is formed with a low unit weight region 110 having a lower unit weight (metsuke) of the absorbent material than other regions of the absorbent core 40a. The low unit weight region 110 is located at the center in the width direction 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 in plan view (in plan view) of the disposable diaper 10.

A liquid-permeable top sheet 50 is provided on the surface side (skin-facing side) of the absorbent body 40. In addition, a liquid-impermeable back sheet 60a is provided on the back side (non-skin facing side) of the absorbent body 40. [ An outer sheet 60 is provided on the back side of the back sheet 60a.

Side flaps 70 are provided on the outer edge (outer edge in the width direction) of the absorber 40, 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 width direction. The side flaps 70 are composed of a single nonwoven fabric or a plurality of nonwoven fabrics each having a plurality of two or more layers. The side flaps 70 are located on the skin facing side of the absorbent core and extend outward in the width direction with respect to the absorbent core.

The side flaps 70 are provided with a pair of leg stretchable and contractible portions 75 which are arranged inside the leg openings 35 in the width direction and extendable and contractible in the longitudinal direction L. [ The leg stretchable and contractible portion 75 may be configured to extend and retract in the longitudinal direction of the leg opening portion 35 or may be disposed along the leg opening portion 35 and may be partially inclined relative to the leg opening portion 35 As shown in Fig.

A pair of leg-side stretchable and contractible portions 80 extending along the longitudinal direction L are provided on the inner side in the width direction of the pair of leg stretchable and contractible portions 75. The leg side stretchable and contractible portion 80 is provided at the inner side end portion in the width direction 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 of the crotch region 25. The crotch stretchable and contractible portion 200 is constructed so as to be able to maintain a flat shape in a part of the crotch region 25 when the disposable diaper is worn, as compared with 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. [

A first cutout 115 and a second cutout 125 are formed in the absorbent core 40a in the crotch region. The first notch 115 and the second notch 125 are slits formed in the absorber 40. The slit is the portion where the absorbent material does not exist. The first notch 115 and the second notch 125 each have a notch shape extending inward in the width direction from the outer edge of the absorbent core 40a.

The fastening tapes 90 extend in the rear waist region 30 in the width direction W and are fixedly attached to the non-skin facing surfaces of the front waist region 20, Thereby holding the diaper 10 on 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. The fastening tape 90 is provided with a base sheet 91 connected to the side flaps 70 and an engagement hook (not shown) as a plurality of engagement members. The fastening tape 90 is fixed to the base sheet 91 And a hook sheet 92 which is made of a metal. The hook sheet 92 is an area where the engaging member is provided.

The target portion 95 is provided on the surface of the outer sheet 60 of the front waist region on the non-skin-facing side. The target portion 95 is configured to catch the fastening tape of the fastening tape, and functions as a loop of a hook-loop fastening system. As the target portion, for example, an air through nonwoven fabric can be used. Further, the disposable diaper may have no target portion, and the fastening tape 90 may be fixedly attached to the outer sheet 60 of the front waist region.

Between the pair of fastening tapes 90 in the width direction, a waist elastic stretchable portion 85 which is stretchable in the width direction is provided. The waist elastic members 85 contract between the fastening tapes 90 in the width direction.

In the present embodiment, the waist elastic portion 85 is formed of a stretchable sheet. The waist-surrounding stretchable and contractible portion 85 is a portion that extends and contracts substantially in the width direction, and is a concept excluding a portion where the stretchable sheet is disposed in a state in which the stretchable and contractible force is not exerted. Therefore, the outer edge of the waist elastic member described later is not the outer edge of the stretchable sheet, but the outer edge of the stretchable and contractible portion.

In this embodiment, a stretchable film having a unit weight of 20 to 45 g / m < 2 > is used as the waist stretchable and contractible portion 85. However, the waist elastic portion 85 may be constituted by a different structure such as a plurality of thread rubbers. The waist elastic stretchable and contractible portion 85 is stretched at a predetermined ratio 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 constituted by a continuous sheet extending in the width direction from the center in the width direction of the disposable diaper toward both outer sides and extending in the width direction. The rear edge of the waist elastic portion 85 is located forward of the rear edge of the disposable diaper. The rear edge of the waist elastic member 85 may coincide with the rear edge of the disposable diaper. The front end edge of the waist expanding and contracting portion 85 is located forward of the rear end edge of the absorbent core 40a and forward of the rear end edge of the core wrap 40b and rearward of the rear end edge of the leg stretchable and contractible portion 75 Located. Therefore, at least a part of the waist elastic member 85 overlaps the absorbent core 40a in a plan view of the disposable diaper. The waist elastic expanding and contracting portion 85 extends beyond the rear end edge of the absorbent core and the rear end edge of the core wrap over the rear end edge of the absorbent core and the rear end edge of the core wraps.

The outer edge 85WO of the waist elastic member 85 is positioned inward in the width direction with respect to the inner edge (inner edge in the width direction) of the fastening tape. The waist elastic expandable portion 85 and the fastening tape 90 are spaced apart from each other in the width direction.

The waist elastic portion has a first region 851 extending inward in the width direction from both outer edges 85WO of the waist elastic expanding and contracting portion and an inner side in the width direction from an inner edge 851WI of the first region 851 And a third region 853 extending inward in the width direction from the inner edge 852WI of the second region 852. The second region 852 extends toward the inside in the width direction.

The first region 851, the second region 852, and the third region 853 extend in the width direction. Therefore, there is no non-stretchable region that does not expand and contract in the width direction between the first region 851 and the second region 852 and between the second region 852 and the third region 853 . 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. Specifically, the extension ratio of the second region 852 in the width direction is lower than the extension ratio in the width direction of the first region 851. The extension ratio in the width direction of the third region 853 is higher than the extension ratio in the width direction of the first region 851. The relationship between the elongation in the width direction of the first region 851 and the elongation in the width direction of the third region 853 may be the same or higher. It is preferable that the extension ratio of the third region 853 in the width direction is higher than the extension ratio in the width direction of the first region 851. [

The outer edge 851WO of the first region 851 is located on the outer side in the width direction with respect to the outer edge of the absorbent core 40a. The inner edge 851WI of the first region 851 is positioned inward in the width direction with respect to the outer edge of the absorbent core. Thus, the first region is disposed over the outer edge of the absorbent core. The inner edge of the first region may be positioned on the outer side in the width direction with respect to the outer edge of the absorbent core and the inner edge of the first region may be absorbed by the absorbent core. Or may be aligned with the outer edge of the core.

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 on the inner side in the width direction with respect to the outer edge of the absorbent core 40a. The third region 853 is disposed over the center in the width direction of the disposable diaper. The third region 853 is preferably overlapped with at least a part of the low-capacitance region in plan view.

Further, the waist-opening stretchable and contractible portion 85 of the present embodiment may be symmetrical with respect to the center line passing through the center in the width direction of the disposable diaper and extending in the longitudinal direction, or asymmetric. For example, both of the left and right first regions 851 may extend to the outer edge of the absorbent core 40a, and even if one of the first regions 851 spans the outer edge of the absorbent core 40a do. Both of the left and right second regions 852 may be disposed inward in the width direction with respect to the outer edge of the absorbent core 40a and one of the second regions 852 may be disposed outside the absorbent core 40a Or may be disposed on the inner side in the width direction with respect to the edge. The disposable diaper according to the present embodiment may be provided with a region having an elongation lower than the elongation of the first region 851 on the outer side in the width direction with respect to the first region 851. [

The waist elastic expanding / contracting portion 85 is located on the side of the non-skin facing side than 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 outwardly in the longitudinal direction 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 the outer sheet 60 as shown in Fig. The position of the waist elastic portion is not particularly limited. In the region where the absorber is not disposed, it may be disposed between the side flap 70 and the back sheet 60a or the external sheet 60. [

The waist elastic stretchable and contractible portion according to the present embodiment is configured to be stretchable in the width direction. However, the waist elastic stretchable portion may be configured to be stretchable in the width direction and the longitudinal direction.

In addition, the waist elastic stretching portion and the absorbent core are bonded together with an adhesive. The adhesives for bonding the waist-extensible stretchable portion 85 and the absorbent core 40a are arranged in a plurality of rows successively in the longitudinal direction, and the rows are superimposed in the widthwise direction. Specifically, the adhesive has a structure in which a plurality of spiral shapes continuous in the longitudinal direction are arranged in the width direction, or a structure in which the heat is amplified in the width direction and a plurality of wave shapes And arranged such that the heat is overlapped in the width direction.

In the present embodiment, the waist elastic expanding / contracting portion 85 and the absorbent core 40a are not directly joined but are indirectly joined through the back sheet 60a and the core wrap 40b. 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 Are preferably arranged in a plurality of rows successively in the longitudinal direction, and each row is arranged in the widthwise direction so as to overlap with each other.

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

When the disposable diaper 10 is sealed in a package or the like, the disposable diaper 10 is taken out of the package. Subsequently, an arrangement region of the stretchable sheet constituting the waist elastic portion is cut out, and a sample to be measured is prepared. The sample is allowed to stand for 24 hours in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH, and this state is set as a natural state of the stretchable sheet. (In the longitudinal direction) of the stretchable sheet is intermittently arranged in the width direction along the width direction between the end portion (front end portion) of the elastic sheet on the absorbent core side and the end portion (rear end portion) (Mark)). With respect to this point, a point (mark) is attached to the end portion in the width direction of the sample of the stretchable sheet at intervals of 5 mm in the lateral direction from the reference with reference to the center in the width direction of the stretchable sheet. Measure the distance between adjacent points. This distance is set to the length of the natural state (it is 5 mm since it is displayed at intervals of 5 mm). Next, the distance between the marks is measured from the 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. The elongation percentage is calculated from the following formula: elongation (times) = (distance between display of elongation state) / (distance between displays of natural state) of each site.

(2) Manufacturing method of disposable diaper

Next, an example of a method of manufacturing the absorbent article according to the present embodiment will be described. For the method not described in this embodiment, an existing method can be used. The production method described below is an example, and may be produced by another production method. A method of manufacturing an absorbent article includes at least a component forming step, a component mounting step, a leg-hole forming step, and a cutting step.

In the constituent part forming step, constituent parts constituting the absorbent article are formed. Concretely, for example, the absorber 40 is formed by laminating absorbing materials, or the fastening tape 90 is formed.

In the constituent component placement process, on the web constituting the back sheet, a stretchable sheet constituting the waist elastic member 85, another web such as a web constituting the top sheet, a leakage preventing sheet, an absorbent body, The disposable diaper 10 such as the stretchable and contractible portion 75 is placed.

As a method for changing the extension ratio of the waist elastic portion 85, for example, the following methods can be mentioned. The waist elastic stretchable and contractible portion 85 is stretched by a gear in the width direction before the waist elastic stretchable portion 85 is put on the back sheet 60a or the like. (For example, the second region) in which the elongation is lowered when the gear is stretched by the gear. (For example, the first region and the third region) in which the elongation percentage is increased. 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 of the strongly stretched region is relatively high and the elongation 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. As a result, the leg openings 35 disposed around the wearer's legs are 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 width direction W to the size of one product. Thereby, the disposable diaper 10 is produced.

(3) Action / effect

Fig. 4 schematically shows an embodiment in which a disposable diaper is attached to a wearer. Fig. 4 (a) shows a state in which the fastening tape is fixedly attached to the front waist region and the wearer is lying down, Fig. 4 (b) shows a state in which the fastening tape is fixedly attached to the front waist region, It is in a state of work.

When the tape-type disposable diaper is attached (when fastening tape is fixedly attached), the back of the wearer is placed on the rear waist region of the disposable diaper, and the fastening tape 90 of the rear waist region 30 is placed in front of The fastening tape 90 is fixedly attached to the front waist region 20 by being pulled by the waist region 20.

As shown in Fig. 4 (a), when the fastening tape is fixedly attached, a body pressure of the wearer is applied to the rear waist region 30 of the disposable diaper. 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 pulling the fastening tape 90, a portion located on the outer side in the width direction of the wearer's body, that is, a region on the outer side in the width direction with respect to the absorbent core 40a is pulled. For example, if it is difficult for the pulling-out portion of the fastening tape 90 to elongate, the attachment assisting person can not grasp to what extent the fastening tape 90 can be stretched, have. However, since the first region 851 having a relatively high elongation is arranged on the outer side in the width direction with respect to the absorbent core 40a, the attaching assistant is able to secure the fastening tape 90 by extending the first region 851 . The mounting assistant can easily grasp the range in which the first area 851 can be extended since the mounting assistant is easy to increase the first area 851. [ Therefore, the mounting assistant can grasp the range in which the fastening tape 90 is extended, and fix the fastening tape to the correct position.

Further, when the fastening tape 90 is fixedly attached, the first area 851 is disposed at a position corresponding to the radial (hipbone) of the side of the wearer. On the other hand, when the fastening tape 90 is fixedly attached, the second area 852 and the third area 853 are in a state in which it is difficult to stretch and contract due to the application of the body pressure of the wearer. However, after the disposable diaper is attached to the wearer, for example, when the wearer is raised, the body pressure applied to the rear waist region 30 of the disposable diaper is reduced. The first region 851, the second region 852, and the third region 853 interlock 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 is attached, as compared with the second area 852 and the third area 853. In this state, when the second region 852 and the third region 853 expand and contract, respectively, a 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 The third region 853 with a relatively high elongation rate is pulled out to pull the second region 852 inward in the width direction and the second region 852 is stretched. At this time, since the first area 851 is located on the fastening tape side, it increases when the fastening tape 90 is fixedly attached to the target portion 95. At this time, since there is a third region 853 which is harder to further extend inward than the second region 852 in the width direction, the second region 853, which is located at a position sandwiched between the first region 851 and the third region 853, The second area 852 can easily be evenly pushed against the body without tightening the baby's body with a weak force.

By disposing the disposable diaper in this manner, the first region 851 strongly fits the radius of the side of the wearer. In addition, the back side of the back side of the wearer's side is less radial, and the wearer's body is relatively soft. In the portion where the radial direction is small, the second region 852 fits slightly. The body of the wearer strongly fits to the relatively hard region and the wearer's body softly fits the relatively soft region, so that the fit of the wearer can be fitted to the wearer's body comfortably, thereby improving the fitability of the waistline. In other words, the fact that the mother (the caregiver) does not want to "tighten the baby with a diaper" and that, on the other hand, it does not create a gap between the body and the body, And that it is better for the user to be stronger).

The third region 853 is disposed over the center in the width direction of the disposable diaper 10. The center of the back of the wearer is arranged in the backbone, and is recessed toward the abdominal side than the left and right portions. The concave portion (rhombus of Mikael) is a concave portion of sacrum, and a third region 853 is disposed in the concave portion. In Fig. 4 (a), a concave portion CR is shown. After mounting the disposable diaper, when the body pressure is reduced, the third region 853 contracts while pulling the second region 852. The shrunk portion can be disposed on the concave portion of the wearer. Therefore, the disposable diaper 10 can be fitted to the entire waist circumference by suppressing a gap between the center of the back of the wearer and the disposable diaper. 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 gap is likely to be formed between the body and the disposable diaper. However, since the rear end edge of the waist elastic expanding / contracting portion 85 extends toward the waist side beyond the rear end edge of the absorbent core 40a and the elongation percentage of the third region 853 is relatively high, Can be more reliably prevented.

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

If the third region 853 is disposed in the entire width direction of the absorbent core 40a, the width of the absorbent core 40a may be too short in the natural state due to the contraction of the third region 853. As a result, when the fastening tape is fixedly attached, the width of the disposable diaper can not be ensured, and the attachment facilitator is hard to hold the fastening tape 90, which may deteriorate the attachability. The second region 852 and the third region 853 are disposed within the entire width direction of the absorbent core 40a because the second region 852 is located inside the width direction of the absorbent core 40a do. Therefore, the width of the absorbent core 40a is not too short in the natural state, and deterioration of the attachability can be suppressed.

The inner edge of the first region 851 is located inward in the width direction with respect to the outer edge of the absorbent core 40a. When the fastening tape is pulled and mounted, the mounting assistant fixes the fastening tape by stretching the first area. Further, when the fastening tape is fixedly attached by extending the first region, the absorbent core is disposed under the wearer's body, and the body pressure is applied. Since the inner edge of the first region is disposed inside the width direction of the outer edge of the absorbent core, the inner edge of the absorbent core is difficult to move under the wearer's body when the fastening tape is pulled and attached. Therefore, when the inner edge of the first area 851 is located inside the width direction than the outer edge of the absorbent core 40a, when the fastening tape is pulled, the inner edge of the first area 851, And the first region 851 can be easily enlarged.

The adhesive 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 and the rows may be arranged in the widthwise direction to overlap each other. The waist expandable / contractible portion and the absorbent core can be continuously bonded in the longitudinal direction and the width direction, so that the waist elastic stretching portion can be prevented from rising from the absorbent core.

The extension ratio in the width direction of the third area 853 may be higher than the extension ratio in the width direction of the first area 851. [ The elongation percentage of the third region 853 is higher than the elongation percentage of the first region 851 so that the third region 853 is formed after the fastening tape is fixedly attached and the body pressure applied to the rear waist region is reduced, The second region 852 is pulled out. Therefore, the portion contracted by the third region can be collected in the concave portion of the back of the wearer.

The third region 853 overlaps at least a part of the low-capacitance region in a plan view. The lower unit capacity region is contracted in the width direction by the third region, and the rear end edge of the absorbent core is deformed toward the widthwise center side. The rear portion of the absorbent core can be formed into a cup shape. The wearer's buttocks can be covered by the cup-shaped absorbent core to further enhance 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 located at 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 is extended beyond the absorbent core 40a, the stretchability 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 trailing edge of the absorbent core 40a and the trailing edge of the core wrap 40b, the waist-surrounding stretchable and contractible portion 85 is located behind the trailing edge of the absorbent core and the trailing edge of the core- The core wraps, and the like do not hinder the elongation and contraction of the waist expandable and contractible portion 85.

Further, the waist-surrounding stretchable and contractible portion 85 is not disposed at the rear end edge of the disposable diaper, and the side flap at the rear end edge of the disposable diaper is formed with indentation inward in the width direction and inward in the longitudinal direction. More specifically, the rear end edge of the side flap is recessed inward in the longitudinal direction in a certain range extending inward in the width direction from the outer edge of the side flap. In other words, the outer edge of the side flap is recessed inward in the width direction in a certain range extending inward in the longitudinal direction from the rear edge of the side flap. In this way, since the trailing edge of the disposable diaper is constituted, it is possible to restrain the back edge of the disposable diaper from being bent, 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 it should not be understood that the description and the drawings constituting a part of this disclosure are intended to limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will become apparent to those skilled in the art. Accordingly, the technical scope of the present invention is determined only by the inventive particulars of the scope of the proper patent claims from the above description.

The entire contents of Japanese Patent Application No. 2014-214860 (filed on October 21, 2014) are incorporated herein by reference.

Industrial availability

It is possible to provide a tape-type disposable diaper capable of enhancing fitability around the waist.

10: disposable diaper 20: front waist region
25: crotch region 30: rear waist region
35: leg opening 40: absorber
40a: absorbent core 40b: core wrap
50: top sheet 60: outer sheet
60a: back sheet 70: side flap
75: leg stretching and shrinking portion 80: leg side stretching portion
85: waist elastic stretching part 851: first region
852: second area 853: third area
90: fastening tape 110: low unit weight area
115: 1st cut 125: 2nd cut
200: Crotch elastic member L: Longitudinal direction
W: width direction

Claims (11)

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 extending from the front waist region to 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 fixedly attached to the front waist region,
An absorbent core extending toward at least one 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 waist elastic expanding portion extends toward both outer sides in the width direction from the center in the width direction of the disposable diaper,
The waist elastic expanding portion includes a first region extending inward in the width direction from both outer edges of the waist elastic expanding portion and a second region extending inward in the width direction from an inner edge of the first region, And a third region extending inward in the width direction from an inner edge of the second region and having an elongation percentage higher than that of the second region,
The second region is configured to be more easily stretched than the third region by being pulled by the third region having a higher degree of contraction than the second region,
And at least a part of the first region is located outside the width direction of the absorbent core. The method according to claim 1,
And the third region is disposed over the center in the width direction of the disposable diaper. The method according to claim 1,
At least a part of the waist elastic expanding and contracting portion is superimposed on the absorbent core when viewed in a plan view (in plan view) of the disposable diaper,
And the waist-surrounding stretchable and contractible portion is located on a non-skin-facing side of the absorbent core. 3. The method of claim 2,
At least a part of the waist elastic expanding and contracting portion is superimposed on the absorbent core in a plan view of the disposable diaper,
And the waist-surrounding stretchable and contractible portion is located on a non-skin-facing side of the absorbent core. 5. The method according to any one of claims 1 to 4,
And the second region is located inside the width direction with respect to the outer edge of the absorbent core. 5. The method according to any one of claims 1 to 4,
And the inner edge of the first region is located inward in the width direction with respect to the outer edge of the absorbent core. 5. The method according to any one of claims 1 to 4,
The waist elastic expanding and contracting portion and the absorbent core are bonded to each other through an adhesive,
Wherein the adhesive is arranged in a plurality of rows successively in the longitudinal direction and each row is arranged to overlap in the width direction. 3. The method of claim 2,
And the elongation percentage in the width direction of the third region is higher than the elongation percentage in the width direction of the first region. 5. The method according to any one of claims 1 to 4,
A low unit weight region having a lower unit weight (metsuke) of the absorbent material than the other region of the absorbent core is formed at the center in the width direction of the rear end edge of the absorbent core,
Wherein the third region overlaps at least a part of the low unit weight region in a plan view. 5. The method according to any one of claims 1 to 4,
And a core wrap covering the absorbent core,
The rear end edge of the absorbent core and the rear end edge of the core wrap coincide with each other,
And the waist elastic stretching portion extends rearward beyond the rear end edge of the absorbent core and the rear end edge of the core wrap. 5. The method according to any one of claims 1 to 4,
And a side flap which is positioned on the skin facing side of the absorbent core and extends outward in the width direction than the absorbent core,
Wherein a trailing edge of the side flap is recessed inward in the longitudinal direction in a range extending from an outer edge of the side flap to an inner side in the width direction.

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