WO2015001826A1

WO2015001826A1 - Underpants-type wearable article

Info

Publication number: WO2015001826A1
Application number: PCT/JP2014/060137
Authority: WO
Inventors: 健島津; 市川　誠; 祐介川上; 唯近藤
Original assignee: ユニ・チャーム株式会社
Priority date: 2014-03-31
Filing date: 2014-04-08
Publication date: 2015-01-08
Also published as: JP2015195800A; CN105101923B; TWI513457B; CN105101923A; JP5566550B1; TW201531286A; AU2014285564B2; AU2014285564A1; WO2015001826A4

Abstract

　Provided is an underpants-type wearable article which can be easily worn, and the rear-waist region of which can be smoothly pulled up.　This underpants-type wearable article (10) has: a first region (71B) in which front-waist elastic bodies (72) are arranged, and which is disposed between the edge of a waist opening (23) and a front end edge (58a) of a liquid-absorbent core; and a second region (73B) in which rear-waist elastic bodies (74) are arranged and which is disposed between the edge of the waist opening and a rear end edge (58b) of the liquid-absorbent core. The first and second regions are positioned so at to face each other in the front-rear direction (Z). The number of rear-waist elastic bodies present in the second region is higher than the number of front-waist elastic bodies present in the first region. The vertical distance between adjacent rear-waist elastic bodies in the second region is shorter than the vertical distance between adjacent front-waist elastic bodies in the first region.

Description

Pants-type wearing items

The present invention relates to a pants-type wearing article.

Conventionally, it has a front waist region, a rear waist region, a crotch region located between the front and rear waist regions, and includes a chassis including a liquid-absorbing core extending from the crotch region to the front and rear waist regions, and a pair of waist openings and Pants-type wearing articles with leg openings are known. For example, Patent Document 1 includes a chassis including a front and rear waist region, a crotch region, and a liquid-absorbing core, and a plurality of string-like or strand-like waist elastic bodies extending in the lateral direction are provided in the front and rear waist region. A wearing article arranged in a stretchable and contracted state is disclosed.

In this wearing article, the elastic region (hereinafter referred to as the first) is a region outside the longitudinal direction (longitudinal direction) of the liquid-absorbent core and is located between the waist opening edge of the front waist region and the liquid-absorbent core in the longitudinal direction. 1 region), and an elastic region (hereinafter referred to as a second region) that faces the first region in the front-rear direction and is positioned between the waist opening edge of the rear waist region and the liquid-absorbent core in the longitudinal direction. Have. The separation dimension (pitch) of the waist elastic bodies adjacent in the first region and the separation dimension of the waist elastic bodies adjacent in the second region are set to be equal. Thereby, the bending rigidity in the vertical direction of the first region and the second region is substantially equal.

International Publication WO2004 / 054482

In the wearing article disclosed in Patent Document 1, the longitudinal bending stiffness in the first region is set to be relatively low, so that when worn, the edge of the waist opening is expanded in the first region. The chassis is bent and it becomes easy to hook a finger, and the wearing operation is simplified.

On the other hand, in the rear waist region, the second region has a relatively low bending rigidity substantially equal to the first region, so that the region is bent and the edge of the waist opening is in contact with the wearer's thigh. There is a problem that a so-called “tap” state occurs in a part of the chassis in the second region when it is difficult to pull it up as it hits the step with the buttocks.

Therefore, an object of the present invention is an improvement of the conventional technique, which is easy to wear and can smoothly raise the rear waist region, so-called "trick" to a part of the rear waist region. An object of the present invention is to provide a pants-type wearing article that does not cause a state.

In order to achieve the above object, the present invention provides a longitudinal direction and a lateral direction, a skin facing surface and a non-skin facing surface located on the opposite side, a front waist region, a rear waist region, and the front and rear waist regions. A chassis including a liquid-absorbing core extending from the crotch region to the front and rear waist region, and a waist opening and a pair of legs defined by connecting both side edges of the front and rear waist region An improvement of a pants-type wearing article including an opening.

1st invention in this invention is the said wearing article WHEREIN: The said liquid-absorbent core has the front-end edge and rear-end edge which are spaced apart and opposed in the said vertical direction, and extend in the said horizontal direction, The said front waist region is A plurality of front waist elastic bodies attached in a stretched state between both side edges of the front waist region so as to be contractible in the lateral direction, and the front waist elastic bodies are disposed, and edges of the waist openings And a first region located between the front end edge of the liquid-absorbent core, and the rear waist region can be contracted in the lateral direction in a stretched state between both side edges of the rear waist region. A plurality of attached rear waist elastic bodies, a second region in which the rear waist elastic bodies are disposed and located between an edge of the waist opening and the rear end edge of the liquid-absorbent core; And the first region and the second region are The front waist elastic bodies are located opposite to each other in the front-rear direction of the use state, and the number of the rear waist elastic bodies in the second region is larger than the number of the front waist elastic bodies in the first region, A longitudinal separation dimension of the rear waist elastic bodies adjacent to each other is smaller than a longitudinal separation dimension of the front waist elastic bodies adjacent to each other in the first region.

Moreover, 2nd invention in this invention is the said wearing article, The said liquid-absorbent core has the front-end edge and rear-end edge which are spaced apart and opposed in the said vertical direction, and extend in the said horizontal direction, The said front waist The region has a first region located between the edge of the waist opening and the front end edge of the liquid-absorbent core and spans the entire region between both side edges of the front waist region, and the rear waist The region is located between the edge of the waist opening and the rear end edge of the liquid-absorbent core, and has a second region over the entire area between both side edges of the rear waist region, The first region and the second region are located opposite to each other in the front-rear direction of the wearing state, and the bending rigidity in the longitudinal direction of the second region is the bending rigidity in the longitudinal direction of the first region. It is characterized by being higher than.

According to one or more embodiments of the pant-type wearing article according to the first aspect of the present invention, the front waist region is arranged with the front waist elastic body, and the edge of the waist opening and the liquid-absorbent core The rear waist region is located opposite the first region in the front-rear direction of the wearing state, the rear waist elastic body is disposed, and the waist opening Having a second region located between the edge and the rear edge of the liquid-absorbent core, the number of rear waist elastic bodies in the second region being greater than the number of front waist elastic bodies in the first region; The longitudinal separation dimension of the rear waist elastic bodies adjacent to each other in the second region is smaller than the longitudinal separation dimension of the front waist elastic bodies adjacent to each other in the first region. Therefore, in the first region, the bending rigidity in the vertical direction is lower than that in the second region, and when the edge of the waist opening is expanded, it is easy to hook a finger on the chassis and the wearing operation is easy. On the other hand, in the second region, the bending rigidity in the vertical direction is higher than that in the first region, and the chassis is difficult to be bent. The rear waist region can be smoothly raised.

According to one or more embodiments of the pants-type wearing article according to the second invention of the present invention, the bending rigidity in the longitudinal direction of the second region located in the rear waist region is the first located in the front waist region. It is higher than the bending stiffness in the longitudinal direction of the region. Therefore, when the edge of the waist opening is widened, it is easy to hook a finger on the chassis in the first region and the wearing operation is easy. In the second region, the chassis is not easily bent, and so-called “ It is possible to prevent the “waist” state from occurring and smoothly raise the rear waist region.

The drawings illustrate certain embodiments of the invention according to the present disclosure and include selective and preferred embodiments as well as essential configurations of the invention.
The perspective view of the disposable diaper in 1st Embodiment shown as an example of the pants | underpants type wearing article which concerns on this indication. The partial fracture | rupture expansion | deployment top view of the diaper extended to the vertical direction and the horizontal direction until the maximum expansion | extension of each elastic body (the extent which the gathers by the contraction effect | action of an elastic body disappear). The partially broken disassembled perspective view of a diaper. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 1. The top view of a front waist area. The top view of a back waist area. (A): The perspective view seen from the back side which shows the state at the time of wearing the conventional diaper. (B): Schematic cross-sectional view along the line VIIb-VIIb. (A): The perspective view seen from the back side which shows the state at the time of wearing the diaper shown in FIG. (B): Schematic cross-sectional view along the line VIIIb-VIIIb. It is the top view which looked at the back waist area from the back side, Comprising: Explanatory drawing which shows the collection site | part of a test piece. The top view which looked at the back waist area from the back side which shows the modification of a diaper. FIG. 11 is a schematic cross-sectional view taken along line XI-XI in FIG. 10. The top view similar to FIG. 2 of the diaper in 2nd Embodiment. The disassembled perspective view similar to FIG. 3 of the diaper in 2nd Embodiment.

<First Embodiment>
The following embodiment relates to a pants-type wearing article shown in FIGS. 1 to 4 as an example of the present invention, and includes not only an indispensable structure of the invention but also a selective and preferable structure. In FIG. 2, each elastic body, which will be described later, resists the contraction force, and the gathers generated in the members to which the elastic bodies are attached by the contraction force in the horizontal direction X and the vertical direction Y are substantially reflected by natural vision. It has been stretched to such an extent that it seems to be lost.

1 to 3, a disposable pant-type diaper 10 which is an example of a pant-type wearing article according to the present invention includes a vertical direction Y and a horizontal direction X that are orthogonal to each other, a skin facing surface, and a non-surface on the opposite side. It has a skin facing surface, a vertical axis P that bisects the length dimension in the horizontal direction X, and a horizontal axis Q that bisects the length dimension in the vertical direction Y, and is substantially symmetrical with respect to the vertical axis P. The front waist region 11, the rear waist region 12, and the crotch region 13 located between the front waist region 11 and the rear waist region 12 are included.

The diaper 10 includes a chassis 14 in the form of a base. The chassis 14 has a concave curved shape on both side edges defining the crotch region 13, and the narrowest part of the crotch region 13 is in front of the horizontal axis Q. Located on the waist region 11 side. The

front side edges

11a and 11b of the front waist region 11 and the

rear side edges

12a and 12b of the rear waist region 12 have side edges that face each other in the longitudinal direction Z of the diaper 10 intermittently extending in the longitudinal direction Y. By being connected by the side seams 22, a waist opening 23 and a pair of leg openings 24 are defined. In the side seam 22, the overlapping sheets are fused together by a known means such as embossing / debossing by heat or ultrasonic waves.

The chassis 14 is located on the skin facing surface, is located on the non-skin facing surface side, and is separated from each other in the longitudinal direction Y, with the base sheet 25 made of a fiber nonwoven fabric defining the front and

rear waist regions

11 and 12 and the crotch region 13 in series. The front waist sheet 26 and the rear waist sheet 27 made of a nonwoven fabric are opposed to each other, and the liquid absorbing structure 15 is located on the skin facing surface side of the base sheet 25 and extends from the crotch region 13 to the front and

rear waist regions

11 and 12. .

<Base sheet>
The base sheet 25 includes first and

second end edges

25a and 25b that are spaced apart in the vertical direction Y, and both

side edges

25c and 25d that are spaced apart in the horizontal direction X. Both

side edges

25c and 25d are a straight portion in the front and

rear waist regions

11 and 12, and a curved portion that protrudes deeper from the rear waist region 12 side toward the front waist region 11 side toward the vertical axis P in the crotch region 13. Formed from.

<Front waist seat>
The front waist seat 26 has a substantially trapezoidal shape that forms the front waist region 11 and a part of the crotch region 13, and extends in the longitudinal direction Y, with an intermediate inner edge 26 a and an outer edge 26 b extending in the lateral direction X. Both

outer edges

26c and 26d, and both

inner edges

26e and 26f connecting both

outer edges

26c and 26d and the intermediate inner edge 26a are formed. The

inner side edges

26e and 26f on both sides have a straight part extending straight from the

outer edges

26c and 26d in the lateral direction X and a curved part extending from the straight part to the intermediate inner edge 26a. The front waist sheet 26 has a bent portion 33 that is bent inward along the waist opening edge. The bent portion 33 is bent inward along the first end edge 25a of the base sheet 25 in a state where the liquid absorbing structure 15 is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure 15 are thus bent. Fixed to the skin facing surface.

<Rear waist seat>
The rear waist sheet 27 has a substantially trapezoidal shape that forms the rear waist region 12 and a part of the crotch region 13, and extends from the intermediate inner edge 27a and the outer edge 27b extending in the lateral direction X, and from the outer edge 27b. Both

outer edges

27c, 27d extending in the vertical direction Y, and both

inner edges

27e, 27f connecting the

outer edges

27c, 27d and the intermediate inner edge 27a in a curved shape are formed. The rear waist sheet 27 has a bent portion 38 that is bent inward along the waist opening edge. The bent portion 38 is bent inward along the second end edge 25b of the base sheet 25 in a state where the liquid absorbing structure 15 is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure 15 are thus bent. Fixed to the skin facing surface.

2 to 4, a front waist elastic body 72 extending in the lateral direction X in the front waist region 11 is attached between the front waist sheet 26 and the base sheet 25 so as to be contractable in an extended state. Between the rear waist sheet 27 and the base sheet 25, a rear waist elastic body 74 extending in the lateral direction X in the rear waist area 12, and a buttocks elastic body extending in a curved shape from the rear waist area 12 toward the crotch area 13 76 is attached to be retractable in the extended state. The front and

rear waist regions

11 and 12 have front and rear waist

elastic regions

71 and 73 that can be elastically expanded and contracted by disposing each elastic body.

The base sheet 25 and the front and

back waist sheets

26 and 27 have a mass of about 10 to 40 g / m ² and a fiber density of about 0.03 to 0.10 g / cm ³ , for example, spunbond fiber nonwoven fabric, SMS (Spunbond / meltblown / spunbond) A fiber nonwoven fabric, an air-through fiber nonwoven fabric, a plastic sheet, or a laminate sheet thereof can be used. In this embodiment, the base sheet 25 has a mass of about 10 to 18 g / m ² , preferably a mass of about 13 g / m ² , and the front and

back waist sheets

26 and 27 have a mass of about 15 to 25 g / m ² , preferably A spunbond fiber nonwoven fabric having a mass of about 20 g / m ² can be used. In the present embodiment, the outer surfaces of the front and

rear waist sheets

26 and 27 are optionally subjected to a grid-like embossing / debossing process, and an uneven pattern 28 is arranged. In the present embodiment, the central portion 13C of the crotch region 13 is formed only from the base sheet 25, but may be formed from a plurality of sheets.

Speaking of each dimension of the diaper 10 (same as the corresponding dimension of the chassis 14), the dimension L1 in the longitudinal direction Y of the diaper 10 is about 600 to 1000 mm, the dimension W1 in the lateral direction X is about 400 to 800 mm, and the front waist region 11 The dimension L2 in the longitudinal direction Y of the

front edge portions

11a and 11b (the same as the dimension in the longitudinal direction Y of the

rear edge portions

12a and 12b of the rear waist region 12) is about 80 to 150 mm.

<Liquid absorption structure>
Referring to FIGS. 2 and 3, the liquid absorbing structure 15 includes a front end edge 15 a and a rear end edge 15 b that are separated from each other in the vertical direction Y and extend in the horizontal direction X, and are separated from each other in the horizontal direction X in the vertical direction Y. And a front end portion 16A, a rear end portion 16B, and a central portion 16C located between the front and

rear end portions

16A and 16B. The liquid-absorbing structure 15 is located on the skin-facing surface side, and is a body-side liner 50 made of a fiber nonwoven fabric having liquid permeability, a liquid-absorbing absorbent body 51 having curved side edges, and a pair of barrier cuffs. A sheet 52 and a leak-proof sheet 53 are included. The absorbent body 51 includes, for example, a liquid absorbent core formed from a mixture of fluff pulp and absorbent polymer particles, and a liquid absorbent diffusible core wrap sheet such as tissue paper that encapsulates the entire liquid absorbent core. Including. The liquid-absorbent core has a front end edge 58a extending in the lateral direction X in the front waist region 11, and a rear end edge 58b that is spaced apart from the front end edge 58a in the longitudinal direction Y and extends in the lateral direction X in the rear waist region. The body side liner 50, the barrier cuff sheet 52, and the leakage preventing sheet 53 form end flaps 56a and 56b extending in the longitudinal direction Y from the front end edge 58a and the rear end edge 58b of the liquid-absorbent core, respectively. The liquid absorbing structure 15 and the base sheet 25 are joined to each other via a joining region 60 formed from a known joining means such as a hot melt adhesive applied to at least one of the facing surfaces. In the present embodiment, the bonding area 60 is configured by a plurality of bonding sites spaced in the longitudinal direction Y, but may be a continuous bonding area so as to bond the entire back surface of the liquid absorbing structure 15. .

Referring to FIG. 2, the pair of barrier cuff sheets 52 are folded in two and the inner surfaces are fixed to each other, and are fixed to the skin facing surface of the body side liner 50 and are spaced apart from each other in the longitudinal direction Y. It has a front fixed portion and a rear fixed portion, a fixed side edge portion 52b extending in the vertical direction Y, and a free side edge portion 52a located inside the horizontal direction X from the fixed side edge portion 52b. A cuff elastic body 57 made of a string-like or strand-like elastic material and extending in the longitudinal direction Y is attached to the free side edge portion 52a of the barrier cuff sheet 52 so as to be contracted in an extended state. When the cuff elastic body 57 contracts, the free side edge portion 52a is separated from the body side liner 50 toward the wearer's body side, and a pair of leakage prevention cuffs for preventing side leakage of body fluid is formed. The leak-proof sheet 53 is formed from a liquid-impervious fiber nonwoven fabric, a liquid-impervious and moisture-permeable plastic film, or a laminate sheet thereof, and is disposed so as to cover at least substantially the entire lower surface of the absorbent body 51. The body fluid is prevented from leaking from the non-skin facing surface (bottom surface) side of the liquid absorbing structure 15.

<Front waist elastic area>
4 is a cross-sectional view taken along the line IV-IV in FIG. 1, and FIGS. 5 and 6 are plan views showing a state in which the liquid absorbing structure 15 is removed in the front and

rear waist regions

11 and 12 shown in FIG. is there. The front waist elastic region 71 includes a front outer elastic region 71A extending in the lateral direction X at the edge of the waist opening 23, a front inner elastic region 71C extending in the horizontal direction X on the crotch region 13 side, and the longitudinal direction of the liquid-absorbing core. A front intermediate elastic region (first region) 71B located on the Y outer side and between the front outer elastic region 71A and the front inner elastic region 71C. The rear waist elastic region 73 includes a rear outer elastic region 73A that extends in the lateral direction X at the edge of the waist opening 23, and a rear waist region that is positioned outside the longitudinal direction Y of the liquid-absorbent core and extends in the lateral direction X on the crotch region 13 side. It has an inner elastic region 73C and a rear intermediate elastic region (second region) 73B located between the rear outer elastic region 73A and the rear inner elastic region 73C. In FIG. 4, as indicated by virtual lines S1 and S2 parallel to the front-rear direction Z, the front outer elastic region 71A and the rear outer elastic region 73A, and the front intermediate elastic region 71B and the rear intermediate elastic region 73B are each worn Are opposed to each other in the front-rear direction Z. However, as long as the effects of the present invention described later are exhibited, at least the front intermediate elastic region 71B and the rear intermediate elastic region 73B need only be positioned to face each other in the front-rear direction Z.

In the present invention, the front and rear intermediate

elastic regions

71B and 73B are located at a distance of at least about 50 mm from the waist opening 23 and at least about 50 mm when the longitudinal Y dimension of the front and

rear waist regions

11 and 12 is about 140 mm. Width dimension (dimension in the longitudinal direction Y). Since the front and rear intermediate

elastic regions

71B and 73B are separated from the waist opening 23 by at least about 50 mm, when the diaper 10 is worn, the front outer elastic region 71A is grasped by hand so as to be wound by hand on the front waist region 11 side. It becomes easy to hook a finger on the formed front intermediate elastic region 71B, and when the diaper 10 is pulled up in the rear waist region 12, it is difficult to bend the rear intermediate elastic region 73B in a step between the wearer's buttocks and thighs. Therefore, it is possible to prevent so-called “crush”. In order to achieve the effects of the present invention described later, the front and rear intermediate

elastic regions

71B and 73B have front and rear end edges 15a and 15b of the liquid absorbing structure 15 in which the bending rigidity in the longitudinal direction Y changes in the front and

rear waist regions

11 and 12, respectively. It is preferably located in the vicinity.
The term “Takeru” means that a part of the article moves while wearing, resulting in a relatively large wrinkle / wrinkle (see FIG. 7).

<Each elastic body>
The front waist elastic body 72 can be formed from a string-like or strand-like elastic material. The front waist elastic body 72 located in the front outer elastic region 71A is composed of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is extended about 1.8 to 3.5 times, and the longitudinal direction It is preferable that they are arranged at a distance of about 3 to 15 mm in Y. In this embodiment, they are made of five elastic materials having a fineness of about 620 dtex and an expansion ratio of about 2.3 times, and about 6 mm in the longitudinal direction Y. They are arranged at intervals. The front waist elastic body 72 located in the front intermediate elastic region 71B is positioned so as to overlap with the end flap 56a of the liquid absorbing structure 15 in a plan view, and has a fineness of 300 to 1000 dtex, about 1.8 to 3.5 times. It is preferably made of a plurality of elastic materials arranged in a stretched state, and is preferably spaced apart from each other by about 3 to 15 mm in the longitudinal direction Y. In this embodiment, the fineness is about 470 dtex and the stretching magnification is about It consists of four elastic materials which are 2.3 times, and is spaced apart in the longitudinal direction Y by about 10 mm. The front waist elastic body 72 located in the front inner elastic region 71C is made of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is extended about 1.8 to 3.5 times, and the longitudinal direction It is preferable that they are arranged at a distance of about 5 to 20 mm in Y, and in this embodiment, they are made of 10 elastic materials having a fineness of about 780 dtex, and the stretching magnification is about 2.5 times. About 10 mm apart from each other.

The rear waist elastic body 74 can be formed from a string-like or strand-like elastic material. The rear waist elastic body 74 located in the rear outer elastic region 73A is made of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is stretched about 1.8 to 3.5 times. It is preferable that they are arranged at a distance of about 3 to 15 mm in Y, and in this embodiment, they are made of five elastic materials having a fineness of about 620 dtex and an expansion ratio of about 2.3 times, and are spaced by 6 mm in the longitudinal direction Y. Are spaced apart. The rear waist elastic body 74 located in the rear intermediate elastic region 73B is composed of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is stretched by about 1.8 to 3.5 times. It is preferable that they are arranged apart from each other by about 3 to 15 mm in Y, and in this embodiment, they are made of six elastic materials having a fineness of about 780 dtex and an expansion ratio of about 2.1 times. 7 mm apart. The rear waist elastic body 74 located in the rear inner elastic region 73C is composed of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is stretched about 1.8 to 3.5 times. It is preferable that they are arranged at about 5 to 20 mm apart from each other in Y. In this embodiment, they are made of four elastic materials having a fineness of about 780 dtex and an expansion ratio of about 2.5 times, and about 15 mm in the longitudinal direction Y. They are spaced apart from each other.

Referring to FIG. 6, the chassis 14 has a buttocks elastic region 75 extending from the rear waist region 12 to the crotch region 13. The collar elastic region 75 is attached to a plurality of collar elastic bodies 76 extending in a curved shape toward the horizontal axis Q so as to be contracted in an extended state. The buttocks elastic body 76 can be formed of a plurality of string-like or strand-like elastic materials having a fineness of about 500 to 800 dtex and an extension ratio of about 1.0 to 2.5.

The separation dimension (pitch) in the longitudinal direction Y of the rear waist elastic body 74 disposed in the rear intermediate elastic region 73B is larger than the separation dimension in the longitudinal direction Y of the front waist elastic body 72 disposed in the front intermediate elastic region 71B. Is also small. Here, the “separation dimension in the longitudinal direction Y of each elastic body” refers to the dimension in the longitudinal direction Y in the non-existing region of the elastic body formed between the elastic bodies adjacent to each other in the longitudinal direction Y. In order to make the separation dimension of the rear waist elastic body 74 smaller than that of the front waist elastic body 72, the number of the rear waist elastic bodies 74 is larger than the number of the front waist elastic bodies 72, This can be realized by adopting a configuration in which the fineness (thickness) is larger than the fineness of the front waist elastic body 72.

Thus, the number of the rear waist elastic bodies 74 in the rear intermediate elastic region 73B is larger than the number of the front waist elastic bodies 72 in the front intermediate elastic region 71B, and the longitudinal direction Y of the rear waist elastic body 74 in the rear intermediate elastic region 73B. Is smaller than that of the front waist elastic body 72 of the front intermediate elastic region 71B, the bending rigidity in the longitudinal direction Y of the rear intermediate elastic region 73B (that is, the bending in which a folding line extending in the horizontal direction X is formed) Is relatively higher than the bending rigidity in the longitudinal direction Y of the front intermediate elastic region 71B. In addition, by arranging the string-like or strand-like front and rear waist

elastic bodies

72 and 74 in the front and

rear waist regions

11 and 12, when the rear waist region 12 is pulled up to the waist through the wearer's buttocks, the rear waist region The front and

rear waist regions

11 and 12 can be pressed against the skin of the wearer without causing a so-called “flickering” state in FIG. 12, and the fit of the diaper 10 can be prevented and improved.

In order to make the bending rigidity of the rear intermediate elastic region 73B relatively higher than the bending rigidity of the front intermediate elastic region 71B, the fineness of the rear waist elastic body 74 of the rear intermediate elastic region 73B is the front waist of the front intermediate elastic region 71B. Settings such as using a larger elastic body 72 can be employed. In addition, as shown in the modified examples and other embodiments described later, the rear intermediate elastic region 73B has an element that has higher bending rigidity in the longitudinal direction Y than the front intermediate elastic region 71B. By adding a member, an auxiliary sheet made of nonwoven fabric or plastic, etc., the correlation between the bending stiffnesses can be made to be the front intermediate elastic region 71B <the rear intermediate elastic region 73B.

Further, when the bending rigidity of both

elastic regions

71B and 73B is made different only by the configuration of the front and rear waist

elastic bodies

72 and 74 as in the present embodiment, for example, the number of the rear waist elastic bodies 74 is set to the front waist elastic body 72. If the former pitch is inevitably smaller than that of the latter, it is formed in the non-elastic portion (the non-existing region of the elastic member) between the rear waist elastic bodies 74 and is longitudinally formed. The number of gather rows extending in the transverse direction X that hinders bending in Y is the number of gather rows extending in the transverse direction X formed in the non-elastic portion between the front waist elastic bodies 72 (the non-existence region of the elastic member). Since the number is larger than the number, it can be said that the former has higher bending rigidity than the latter. In addition, a relatively small gather is formed in the non-elastic portion between the rear waist elastic bodies 74, whereas a relatively large gather is formed in the non-elastic portion between the front waist elastic bodies 71. It can be said that the bending rigidity is higher than that of the latter.

FIG. 7 is an explanatory view showing a state when wearing a diaper 110 showing an example of a conventional pants-type wearing article, and FIG. 8 is an explanatory view showing a state when wearing the diaper 10 of the present embodiment. It is.

Referring to FIG. 7, in the conventional diaper 110, the same string-like or strand-like elastic material is used as the front waist elastic body and the rear waist elastic body 174 and is disposed in the front intermediate elastic region 171 </ b> B of the front waist region. The number of the front waist elastic bodies is set to be the same as the number of the rear waist elastic bodies 174 disposed in the rear intermediate elastic area 173B of the rear waist area. In the conventional diaper having such a configuration, the pitch of the front waist elastic body is substantially equal to the pitch of the rear waist elastic body 174, and the bending rigidity of the front intermediate elastic region 171B is relatively low. When the front waist region is expanded, the front intermediate elastic region 171B can be bent and hooked with a finger to facilitate the pulling operation. On the other hand, in the rear waist region, the rear intermediate elastic region 173B is also separated from the front intermediate elastic region 171B. Similarly, the rear outer elastic region 173A is bent and hits the step 79 between the thigh 77 and the buttocks 78, making it difficult to pull up, and the diaper 110 cannot be pulled up smoothly. Furthermore, the rear middle elastic region 173B is bent and the pulling up of the diaper 110 is suppressed, so that the rear inner elastic region 173C is easily bent. If the rear waist region is forcibly raised in such a state, the rear intermediate elastic region 173B remains “warped”, which not only impairs the feeling of wearing, but may also cause excrement leakage.

Referring to FIG. 8, as described above, in the diaper 10 according to the present embodiment, the front and rear waist

elastic bodies

72 and 74 are formed of the same string-like or strand-like elastic material, and the rear intermediate elastic region 73B. The number of the rear waist elastic bodies 74 disposed in the front is larger than that of the front waist elastic body 72 disposed in the front intermediate elastic region 71B. Therefore, since the bending stiffness in the longitudinal direction of the rear intermediate elastic region 73B is higher than the bending stiffness in the longitudinal direction of the front intermediate elastic region 71B, when the waist opening 23 of the diaper 10 is widened when worn. The front intermediate elastic region 71B can be bent and hooked with a finger, and the lifting operation is facilitated. Further, in the rear waist region 12, the rear intermediate elastic region 73B does not bend by resisting the action of bending the front intermediate elastic region 71B so as to be bent. The entire body can be pulled up while being fitted to the wearer's body, and there is no possibility that the rear outer elastic region 73A will be caught by the step 79 between the thigh 77 and the heel 78. Furthermore, the rear inner elastic region 73C is pulled up smoothly without being bent by taking advantage of the rear intermediate elastic region 73B. Since the rear waist region 12 can be pulled up and worn smoothly in this way, there is no possibility that a part of the rear waist region will “torn” and the feeling of wear will decrease, or excrement may leak.

When the number of front waist elastic bodies and rear waist elastic bodies 174 arranged in the front and rear intermediate

elastic regions

171B and 173B is the same as in the conventional diaper 110, the bending rigidity in the vertical direction of both the

regions

171B and 173B is substantially equal. There is a possibility that the rear waist region may be displaced to cause a decrease in wearing feeling, while the front intermediate elastic region may be adjusted by adjusting various settings such as the number of the front waist elastic body and the rear waist elastic body 174, the pitch, and the fineness. The diaper 110 is worn when the longitudinal bending rigidity of the 171B is set to be the same as the bending rigidity of the rear intermediate elastic area 173B so that the rear intermediate elastic area 173B does not “fold” or higher than the bending rigidity of the rear intermediate elastic area 173B. In some cases, the entire front waist area fits into the abdomen, making it difficult to grasp when pulling up, reducing operability and causing discomfort by squeezing the abdomen. There is. In the diaper 10 according to the present embodiment, the number of front waist elastic bodies 72 arranged in the front intermediate elastic area 71B is larger than that of the rear waist elastic bodies 74 arranged in the rear intermediate elastic area 73B. Since the correlation between the bending stiffness in the longitudinal direction Y of the intermediate elastic region 71B and the bending stiffness in the longitudinal direction Y of the rear intermediate elastic region 73B is the front intermediate elastic region 71B <the rear intermediate elastic region 73B, the diaper 10 A plurality of technical effects can be obtained, such as prevention of a decrease in wearing operability and wearing feeling, and prevention of leakage of excrement.

<Measurement method of bending stiffness>
The bending stiffness was measured using an IMADA torque tester (model number EX-0762) (load cell: tension / compression 50N, torque 1N). In each of the front and

rear waist regions

11 and 12 of the diaper 10, the dimension in the longitudinal direction Y is 45 mm from the position spaced 35 mm in the longitudinal direction Y from the waist opening 23 toward the crotch region 13, and the lateral direction X about the longitudinal axis P. A test piece having a size of 30 mm was prepared. FIG. 9 is an explanatory view showing a collection part of the test piece 40 in the rear waist region 12. The test piece 40 is clamped at both ends 41 and 42 in the longitudinal direction (longitudinal direction Y) by 10 mm with a pair of chucks of the test machine, and one of the chucks is rotated around the other chuck, and the test piece is bent. The bending stiffness of 40 is measured with a torque tester. The rotation speed was 30 rpm, the rotation angle was 50 degrees, and the measurement angle was 40 degrees. Five test pieces were prepared for each of the front and rear waist regions 11 and 12 (Examples 1 to 5), and the average value of these measured values (torque strength) (unit: mN · m) was averaged in the longitudinal direction Y. The stiffness value was used. Since the front and

rear waist regions

11 and 12 to be measured have front and rear waist

elastic bodies

72 and 74 attached in an extended state, the front and rear waist

elastic bodies

72 and 74 are cut when the test piece is cut from the diaper 10. The dimensions were measured in a state where the front and

rear waist regions

11 and 12 were pulled in the vertical direction Y and the horizontal direction X against the contraction force. As shown in Table 1, the bending rigidity value B1 of the rear intermediate elastic region 73B was higher than the bending rigidity value B2 of the front intermediate elastic region 71B. In addition, the bending rigidity in the longitudinal direction Y of the front and rear intermediate

elastic regions

71B and 73B can be measured by comparing a test piece prepared according to the above standard based on the JIS L1096 19.1A method (45 ° cantilever method).

By appropriately setting the material, fineness, expansion ratio, and separation distance of the elastic body in each elastic region, the elongation stress of each elastic region, specifically, the predetermined width (30 mm of the portion outside the lateral direction X of the absorber 51) The elongation stress at 171% elongation (71% dimension when the maximum elongation dimension is 100%) in the width) is about 2.5N for the front outer elastic region 71 and about 2.N for the front intermediate elastic region 71B. 5N, the front inner elastic region 71C is set to about 5.0N, the rear outer elastic region 73A is set to about 2.5N, the rear intermediate elastic region 73B is set to about 3.0N, and the rear inner elastic region 73C is set to about 5.0N. When the number and pitch of the front and rear waist

elastic bodies

72 and 74 are adjusted so that the bending rigidity of the rear intermediate elastic region 73B is higher than that of the front intermediate elastic region 71B, the extension stress of the rear intermediate elastic region 73B is It becomes higher than the elongation stress of the elastic region 71B. Further, the difference in elongation stress between the front outer elastic region 71A and the front intermediate elastic region 71B is about 0 to 3.0 N, and the difference in elongation stress between the front intermediate elastic region 71B and the front inner elastic region 71C is about 0.5 to 3. 0N, the difference in elongation stress between the rear outer elastic region 73A and the rear intermediate elastic region 73B is approximately 0 to 3.0N, and the difference in elongation stress between the rear intermediate elastic region 73B and the rear inner elastic region 73C is approximately 1.0 to 5.N. 0N.

By adjusting the number and pitch of the rear waist elastic body 74 and making the elongation stress of the rear intermediate elastic region 73B higher than that of the rear outer elastic region 73A, a so-called “push” state in the rear intermediate elastic region 73B Generation | occurrence | production can be suppressed and the rear waist area 12 of the diaper 10 can be pulled up smoothly along a wearer's buttocks. Further, the chassis 14 is easily bent at a portion where the extension stress changes relatively greatly, but by setting the difference in extension stress between the rear outer elastic region 73A and the rear intermediate elastic region 73B to 3.0 N or less, Occurrence of bending of the chassis 14 at the boundary portion between the rear outer elastic region 73A and the rear intermediate elastic region 73B can be suppressed. In order to make it easier to bend the chassis 14 in the front intermediate elastic region 71A, the number and pitch of the front waist elastic bodies 72 are adjusted so that the elongation stress of the front intermediate elastic region 71B is that of the front outer elastic region 71A. It is more preferable to make it lower.

Referring to FIG. 5, the separation dimension R1 in the longitudinal direction Y of the innermost front waist elastic body 72a in the longitudinal direction Y of the front outer elastic region 71A and the outermost front waist elastic body 72b in the longitudinal direction Y of the front intermediate elastic region 71B is In this embodiment, it is about 16 mm. A separation dimension R2 in the longitudinal direction Y of the innermost front waist elastic body 72c in the longitudinal direction Y of the front intermediate elastic region 71B and the outermost front waist elastic body 72d in the longitudinal direction Y of the front inner elastic region 71C is about 5 to 15 mm. It is preferable that it is about 10 mm in this embodiment. Referring to FIG. 6, the separation dimension R3 in the longitudinal direction Y of the innermost rear waist elastic body 74a in the longitudinal direction Y of the rear outer elastic region 73A and the outermost rear waist elastic body 74b in the longitudinal direction Y of the rear intermediate elastic region 73B is About 5 to 15 mm, and in this embodiment, about 7 mm. The separation dimension R4 in the longitudinal direction Y of the innermost rear waist elastic body 74c in the longitudinal direction Y of the rear intermediate elastic region 73B and the outermost rear waist elastic body 74d in the longitudinal direction Y of the rear inner elastic region 73C is about 10 to 25 mm. It is preferable that it is about 15 mm in this embodiment. Here, the separation dimension of each elastic body refers to the dimension in the longitudinal direction Y of the non-existing region of the elastic body located between the elastic bodies adjacent to each other. The separation dimension R3 in the longitudinal direction Y of the rear outer elastic region 73A and the rear intermediate elastic region 73B is preferably set smaller than the separation dimension R1 in the longitudinal direction Y of the front outer elastic region 71A and the front intermediate elastic region 71B.

In the region between the rear outer elastic region 73A and the rear intermediate elastic region 73B and the region between the front outer elastic region 71A and the front intermediate elastic region 71B, the extension stress changes, that is, the bending rigidity in the longitudinal direction Y changes. As a result, the chassis 14 is easily bent. However, by making the separation dimension R3 in the rear waist region 12 smaller than the separation dimension R1 in the front waist region 11, bending of the chassis 14 that occurs in the rear waist region 12 is suppressed. be able to.

The front end edge 15a of the liquid absorbing structure 15 is preferably located between the innermost front waist elastic body 72a of the front outer elastic region 71A and the outermost front waist elastic body 72b of the front intermediate elastic region 71B. More preferably, it is located closer to the front waist elastic body 72b. By arranging the front end edge 15a between the front outer elastic region 71A and the front intermediate elastic region 71B where the elongation stress changes, the front waist region 11 is easily bent from the front end edge 15a, and the waist opening of the diaper 10 When expanding 23, it becomes easy to put a finger. It is preferable that the rear end edge 15b of the liquid absorbing structure 15 is located opposite to the front end edge 15a in the front-rear direction Z, or is located closer to the waist opening 23 than the front end edge 15a. The rear waist 15b is generated when the diaper 10 is pulled up by increasing the bending rigidity of the rear intermediate elastic region 73B due to the presence of the end flap 56b of the liquid absorbing structure 15 because the rear edge 15b extends to the vicinity of the waist opening 23. The bending of the region 12 can be further suppressed.

The dimensions in the longitudinal direction Y of the respective elastic regions in the front and

rear waist regions

11 and 12 can be classified so as to have a predetermined ratio as long as the effects of the present invention are achieved. For example, the dimensions in the longitudinal direction Y of the front and rear intermediate

elastic areas

71B and 73B and the front and rear inner

elastic areas

71C and 73C are 1.0 to 2.5 times larger than the dimensions in the longitudinal direction Y of the front and rear outer

elastic areas

71A and 73A. It can also be set so that the dimensions of each elastic region in the longitudinal direction Y can be equally divided. The longitudinal direction Y dimensions of the front and rear outer

elastic regions

71A and 73A are preferably set equal, and the longitudinal direction Y dimensions of the front and rear intermediate

elastic regions

71B and 73B are preferably set equal.

<Method for measuring elongation stress>
The tensile stress of each elastic region of the front and rear waist

elastic regions

71 and 73 is set to 100 mm / min using an tensile tester (INSTRON model: 5564) manufactured by Instron Japan Co., Ltd. Measured with For a portion of each elastic region that does not overlap with the liquid absorbing structure, a specimen having a length of 30 to 50 mm in the lateral direction X is cut out from the portion, and the specimen in a natural state is separated from the specimen in the lateral direction X. A pair of marked lines with a dimension of 20 mm is entered, and the extension force of each specimen when it is extended until the separation dimension becomes 1.7 times is obtained and compared. In addition, when the dimension of the longitudinal direction Y of the diaper 10 which is the width dimension in each test piece is not constant, each extension stress when converted to a value in the case of a width of 30 mm for each test piece Compare the specimens.

<Modification>
FIG. 10 is a modification of the diaper 10 of the first embodiment, and the diaper 10 extends in the longitudinal direction Y and the lateral direction X until the maximum elongation of each elastic body (to the extent that gathers due to the contracting action of the elastic body disappear). It is the top view which looked at the back waist area 12 from the back surface side (non-skin opposing surface side).

In the diaper 10 in the modified example, a rigidity imparting member 65 that functions as a fastening tape used when the diaper 10 is discarded is disposed in the central portion 66 of the rear intermediate elastic region 73B. Referring to FIG. 11, the rigidity imparting member 65 is disposed on the non-skin facing surface side of the rear waist sheet 27, is formed of a plastic sheet extending in the longitudinal direction Y, and is laminated on each other via a folding line. The section 61, the second section 62, and the third section 63 are configured, and the cross section in the stacked state is formed in a Z shape. The first part 61 is fixed to the rear waist sheet 27 via an adhesive, the second part 62 is detachably joined to the first part 61, and the third part 63 is detachably joined to the second part 62. ing.

In such a diaper 10, the rigidity imparting member 65 is attached to the rear intermediate elastic region 73B, whereby the bending rigidity of the rear intermediate elastic region 73B is increased, and the rear intermediate elastic region 73B generated when the diaper 10 is worn. The so-called “crush” state can be further suppressed. The stiffness imparting member 65 is not limited to a plastic sheet, and a single or multiple layers of fiber nonwoven fabric or the like can also be used.

The rigidity imparting member 65 can be disposed on the side portion 67 located outside the central portion 66 in the lateral direction X in addition to the central portion 66 in the lateral direction X of the rear intermediate elastic region 73B. In the diaper 10 illustrated in FIG. 10, the rigidity imparting member 65 is disposed in a region overlapping the vertical axis P in the central portion 66, and extends from the rear inner elastic region 73C to the rear outer elastic region 73A. When the diaper 10 is lifted from the wearer's leg toward the waist, the central portion 66 is likely to hit the wearer's buttocks 78 and the diaper 10 is restrained from being lifted, so that a so-called “tuck” state is likely to occur. By arranging, it is possible to suppress the occurrence of a so-called “tuck” state and to smoothly pull up the diaper 10 along the heel part 78. Further, the rigidity imparting member 65 may be disposed at the central portion 66 and both

side portions

67 and 67 in the lateral direction X, and the bending of the rear waist region 12 can be further suppressed by disposing a plurality of the rigidity imparting members 65. . In addition, since the rigidity imparting member 65 is arranged to extend from the rear inner elastic region 73C to the rear outer elastic region 73A, the boundary portion between the rear outer elastic region 73A and the rear intermediate elastic region 73B, and the rear intermediate elastic region 73B and the rear The chassis 14 can be prevented from being bent at the boundary portion of the inner elastic region 73C.

Second Embodiment
12 is a plan view similar to FIG. 2 of the diaper 10 according to the second embodiment, and FIG. 13 is an exploded perspective view similar to FIG. 3 of the diaper 10 according to the second embodiment. Since the basic configuration of the diaper 10 according to the present embodiment is the same as that according to the first embodiment, only differences will be described below.

In the diaper 10 of this embodiment, instead of the front and rear waist

elastic bodies

72 and 74, a waist elastic sheet 90 made of a sheet member that can be elastically expanded and contracted in the lateral direction X is disposed in the front and

rear waist regions

11 and 12. Yes. The waist elastic sheet 90 includes a front waist elastic sheet 91 located in the front waist region 11 and a rear waist elastic sheet 92 located in the rear waist region 12, and the front waist elastic sheet 91 is a longitudinal direction of the liquid-absorbent core. The outer side of Y is disposed between the base sheet 25 and the front waist sheet 26, and the rear waist elastic sheet 92 is made of the same sheet material as the front waist elastic sheet 91, and the longitudinal direction Y of the liquid absorbent core And is disposed between the base sheet 25 and the rear waist sheet 27. The front and rear waist

elastic sheets

91 and 92 are joined to each other at the side seam 22 to form an annular waist elastic region. In the rear waist region 12, the second region 84 located between the edge portion 82 of the waist opening 23 and the rear end edge 58 b of the liquid-absorbent core and extending over the entire region between both side portions of the rear waist region 12 is further An auxiliary sheet 93 is arranged.

The auxiliary sheet 93 is arranged over the entire area between both side portions of the rear waist region 12, and in the region located outside the longitudinal direction Y of the liquid-absorbent core in the front and

rear waist regions

11, 12, The bending rigidity in the direction Y is set to be higher than that in other regions. In the front waist region 11 of the diaper 10, the diaper 10 is located between the edge 81 of the waist opening 23 and the front end edge 58 a of the liquid-absorbent core, and is opposed to the second region 84 in the front-rear direction Z in the wearing state of the diaper 10. In the first region 83, the bending rigidity in the longitudinal direction Y is set to be relatively lower than that in the second region 84. The auxiliary sheet 93 can be formed of a fiber nonwoven fabric or the like, and is preferably a sheet member that can be elastically expanded and contracted in the lateral direction X.

In the diaper 10 of the second embodiment, since the bending rigidity in the vertical direction Y of the second region 84 is higher than the bending rigidity in the vertical direction Y of the first region 83, the same technical effect as in the first embodiment is achieved. be able to.

In addition to the materials described in the specification, various known materials that are usually used in this type of article can be used without limitation for the respective constituent members constituting the diaper 10 according to the present invention. In the specification and claims, the terms “first”, “second”, and “third” are used to simply distinguish similar elements, positions, and the like.

The disclosure relating to the present invention described above can be organized into at least the following matters.

The longitudinal direction Y and the lateral direction X, the skin facing surface and the non-skin facing surface located on the opposite side, the front waist region 11, the rear waist region 12, and the crotch region 13 located between the front and

rear waist regions

11, 12. And a chassis 14 including a liquid-absorbing core extending from the crotch region 13 to the front and

rear waist regions

11 and 12, and a waist opening 23 and a pair defined by connecting both side edges of the front and

rear waist regions

11 and 12 In the pant-type diaper 10 including the leg opening 24, the liquid-absorbent core has a front end edge 58a and a rear end edge 58b that are spaced apart from each other in the vertical direction Y and extend in the X lateral direction. A plurality of front waist elastic bodies 72 attached so as to be contractible in the lateral direction X in a stretched state between both side edges of the front waist region 11, the front waist elastic bodies 72 are disposed, and the waist opening 23 Edge A front intermediate elastic region 71B located between the front end edge 58a of the liquid-absorbent core, and the rear waist region 12 can be contracted in the lateral direction X in a stretched state between both side edges of the rear waist region 12; A plurality of attached rear waist elastic bodies 74, and a rear intermediate elastic region in which the rear waist elastic bodies 74 are disposed and located between the edge of the waist opening 23 and the rear end edge 58b of the liquid absorbent core 73B, the front intermediate elastic region 71B and the rear intermediate elastic region 73B are located opposite to each other in the front-rear direction Z of the wearing state, and the number of the rear waist elastic bodies 74 in the rear intermediate elastic region 73B is More than the number of front waist elastic bodies 72 in the front intermediate elastic region 71B, the longitudinal dimension Y of the rear waist elastic bodies 74 adjacent to each other in the rear intermediate elastic region 73B is adjacent to each other in the front intermediate elastic region 71B. And wherein the smaller than the separation size of the longitudinal direction Y of the waist elastic member 72.

rear waist regions

11 and 12 In the pant-type diaper 10 including the leg opening 24, the liquid-absorbent core has a front end edge 58a and a rear end edge 58b that are spaced apart from each other in the vertical direction Y and extend in the X lateral direction. Is located between the edge of the waist opening 23 and the front end edge 58a of the liquid-absorbent core, and has a first region 83 across the entire area between both side edges of the front waist region 11, and the rear waist region 12 Is the edge of the waist opening 23 And the second end region 84 that is located between the side edge portions of the rear waist region 12 and is located between the first end region 83 and the second end region 84. Are located opposite to each other in the front-rear direction Z of the wearing state, and the bending stiffness in the longitudinal direction Y of the second region 84 is higher than the bending stiffness in the longitudinal direction Y of the first region 83. .

The present invention disclosed in the above paragraphs 0058 and 0059 includes at least the following embodiments, which can be configured singly or in combination.
(1) A front outer elastic region 71A in which a front waist elastic body 72 is disposed is located at the edge of the waist opening 23 of the front waist region 11, and a rear of the waist opening 23 of the rear waist region 12 is The rear outer elastic region 73A where the waist elastic body 74 is disposed is located, and the innermost rear waist elastic body 74a of the rear outer elastic region 73A and the outermost rear waist elastic body 74b of the rear intermediate elastic region 73B in the longitudinal direction Y. The separation dimension is smaller than the separation dimension in the longitudinal direction Y between the innermost front waist elastic body 72a of the front outer elastic region 71A and the outermost front waist elastic body 72b of the front intermediate elastic region 71B.
(2) The extension stress in the predetermined width of the rear intermediate elastic region 73B is higher than the extension stress in the predetermined width of the rear outer elastic region 73A.
(3) A sheet-like or tape-like rigidity imparting member 65 is disposed in a part of the rear intermediate elastic region 73B.
(4) The rigidity imparting member 65 is located in the central portion 66 in the lateral direction X of the rear intermediate elastic region 73B.
(5) The rigidity imparting member 65 is a fastening tape extending in the longitudinal direction Y.

10 Diapers (pants-type wearing items)
11 Front waist region 12 Rear waist region 13 Crotch region 14 Chassis 15 Liquid absorbing structure 58a Front end edge 58b of liquid absorbing core Rear end edge 65 of liquid absorbing core Stiffening member 71 Front waist elastic region 71A Front outer elastic region 71B Front middle elastic region (first region)
72 front waist elastic body 73 rear waist elastic region 73A rear outer elastic region 73B rear intermediate elastic region (second region)
74 rear waist elastic body X transverse direction Y longitudinal direction Z longitudinal direction

Claims

The crotch has a longitudinal direction and a lateral direction, a skin facing surface and a non-skin facing surface located on the opposite side, a front waist region, a rear waist region, and a crotch region located between the front and back waist regions. In a pants-type wearing article including a chassis including a liquid-absorbent core extending from a region to the front and rear waist region, a waist opening and a pair of leg openings defined by connecting both side edges of the front and rear waist region,
The liquid-absorbent core has a front end edge and a rear end edge extending in the lateral direction so as to be opposed to each other in the vertical direction,
The front waist region includes a plurality of front waist elastic bodies attached in a stretched state between both side edges of the front waist region so as to be contractible in the lateral direction, and the front waist elastic body is disposed, and A first region located between an edge of the waist opening and the front edge of the liquid-absorbent core;
The rear waist region has a plurality of rear waist elastic bodies attached in a stretched state between both side edges of the rear waist region so as to be contractible in the lateral direction, and the rear waist elastic body is disposed, and A second region located between the edge of the waist opening and the rear edge of the liquid-absorbent core;
The first region and the second region are located facing each other in the front-rear direction of the wearing state,
The number of the rear waist elastic bodies in the second region is larger than the number of the front waist elastic bodies in the first region,
The longitudinal separation dimension of the rear waist elastic bodies adjacent to each other in the second region is smaller than the longitudinal separation dimension of the front waist elastic bodies adjacent to each other in the first region. The worn article.
The crotch has a longitudinal direction and a lateral direction, a skin facing surface and a non-skin facing surface located on the opposite side, a front waist region, a rear waist region, and a crotch region located between the front and back waist regions. In a pants-type wearing article including a chassis including a liquid-absorbent core extending from a region to the front and rear waist region, a waist opening and a pair of leg openings defined by connecting both side edges of the front and rear waist region,
The liquid-absorbent core has a front end edge and a rear end edge extending in the lateral direction so as to be opposed to each other in the vertical direction,
The front waist region is located between the edge of the waist opening and the front end edge of the liquid-absorbent core, and has a first region extending over the entire area between both side edges of the front waist region,
The rear waist region is located between the edge of the waist opening and the rear end edge of the liquid-absorbent core, and has a second region extending over the entire area between both side edges of the rear waist region. ,
The first region and the second region are located facing each other in the front-rear direction of the wearing state,
The wearing article, wherein the bending stiffness in the longitudinal direction of the second region is higher than the bending stiffness in the longitudinal direction of the first region.
A front outer elastic region in which the front waist elastic body is disposed is positioned at an edge of the waist opening of the front waist region, and the rear waist elastic body is disposed at an edge of the waist opening of the rear waist region. The rear outer elastic region is located, and the separation dimension in the longitudinal direction between the innermost rear waist elastic body of the rear outer elastic region and the outermost rear waist elastic body of the second region is the front outer elastic region. The wearing article of Claim 1 smaller than the separation dimension in the said vertical direction of the innermost front waist elastic body of an area | region and the outermost front waist elastic body of a said 1st area | region.
The wearing article according to claim 3, wherein an extension stress in a predetermined width of the second region is higher than an extension stress in a predetermined width of the rear outer elastic region.
The wearing article according to any one of claims 1 to 4, wherein a sheet-like or tape-like rigidity imparting member is disposed in a part of the second region.
The wearing article according to claim 5, wherein the rigidity imparting member is located in a central portion in the lateral direction of the second region.
The wearing article according to claim 5 or 6, wherein the rigidity imparting member is a fastening tape extending in the longitudinal direction.