CN212662100U

CN212662100U - Absorbent article

Info

Publication number: CN212662100U
Application number: CN202021139012.XU
Authority: CN
Inventors: 永井贵仁; 下津麻衣子; 梨子木健人
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-06-19
Filing date: 2020-06-18
Publication date: 2021-03-09
Anticipated expiration: 2030-06-18
Also published as: CN112107433A; JP2021000151A; TWI848079B; TW202100118A; WO2020255526A1; JP7366597B2

Abstract

Provided is an absorbent article which has improved fit at least to the lower abdomen or buttocks and improved appearance when worn, while maintaining fit in the crotch region by a central elastic member. The absorbent article includes an outer package and an absorbent body, and has a joint portion that joins a pair of side ends of a front waistline region and a pair of side ends of a rear waistline region, a 1 st elastic region in a widthwise central portion of the absorbent article, a 2 nd elastic region along a widthwise direction at a position inward of the joint portion in a lengthwise direction and outward of a center line in the lengthwise direction of the absorbent article, and a length in a widthwise direction of an intersection region where the 1 st stress region and the 2 nd stress region intersect is shorter than a length in the lengthwise direction when the 1 st elastic region and an extension region thereof are set as a 1 st stress region and the 2 nd elastic region and an extension region thereof are set as a 2 nd stress region.

Description

Absorbent article

Technical Field

The utility model relates to an absorptive article.

Background

Conventionally, an absorbent article such as a disposable diaper is known in which a central elastic member such as a rubber band that stretches and contracts in the longitudinal direction of the absorbent article is provided in an extended state at a central portion in the width direction of the absorbent article (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: re-publication of WO2011/132688

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

In the absorbent article, the elastic member that is bent from both side ends in the width direction of the waistline region into the crotch region and traverses the absorbent body in the width direction of the absorbent article has a lower stretching stress in a portion traversing the absorbent body than the stretching stress of the central elastic member, and the fit in the crotch region is improved to prevent leakage. However, since the elastic member traversing the absorbent body is weak in stress, the fit at the buttocks is lowered, and the wearing feeling may be deteriorated.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an absorbent article which improves the fit of at least the lower abdomen or the buttocks and also improves the appearance (appearance) when worn, while maintaining the fit of the crotch portion by the central elastic member.

Means for solving the problems

The main technical scheme for realizing the purpose is as follows:

an absorbent article having a longitudinal direction, a width direction, and a thickness direction that intersect each other in an expanded state and in an extended state, the absorbent article comprising: an exterior body having a waistline region and a crotch region; and an absorbent article having an absorbent body provided on a skin side of the outer package in the thickness direction in at least the crotch region, wherein the waistline region includes a front waistline region located on one end side of the absorbent body in the longitudinal direction and a rear waistline region located on the other end side of the absorbent body in the longitudinal direction, each of the front waistline region and the rear waistline region includes a joint portion that joins a pair of side ends of the front waistline region and a pair of side ends of the rear waistline region, the absorbent article has a 1 st elastic region provided on a non-skin side of the absorbent body in the thickness direction, the absorbent article is disposed along the longitudinal direction of the absorbent body at a center portion of the absorbent article in the width direction, and the absorbent article has a 2 nd elastic region, the 2 nd elastic region is disposed along the width direction at a position inward in the length direction of at least one of the joint portion of the front waistline region and the joint portion of the rear waistline region and outward of a center line in the length direction of the absorbent article, and when the 1 st elastic region and its extension region are set to a 1 st stress region and the 2 nd elastic region and its extension region are set to a 2 nd stress region, in an intersection region where the 1 st stress region and the 2 nd stress region intersect each other, a length in the width direction of the intersection region is shorter than a length in the length direction of the intersection region.

In the absorbent article, the 1 st elastic region may overlap at least one of the front waistline region and the back waistline region when viewed in the thickness direction.

In the absorbent article, the 2 nd elastic region may be provided over the entire width direction of the absorbent body, and the 2 nd elastic region may intersect with the 1 st elastic region.

In the absorbent article, 1 or more flexible shafts may be provided along the longitudinal direction of the absorbent body.

In the absorbent article, a pair of flexible shafts may be provided along the longitudinal direction of the absorbent member.

In the absorbent article, a central flexible shaft may be provided along the longitudinal direction at a central portion of the absorbent body in the width direction, and a pair of side flexible shafts may be provided along the longitudinal direction at positions outside the central flexible shaft in the width direction of the absorbent body.

In the absorbent article, a central flexible shaft may be provided along the longitudinal direction at a central portion in the width direction of the absorbent body, and at least a part of the central flexible shaft and at least a part of the 1 st elastic region may overlap each other when viewed in the thickness direction.

In the absorbent article, the 2 nd elastic region may be provided on the inner side in the longitudinal direction than the joint portion of the back waistline region and on the outer side than the center line in the longitudinal direction of the absorbent article, an inner end portion in the longitudinal direction of the front waist region has a 3 rd elastic region arranged along the width direction, the 1 st elastic region extends a predetermined length from an outer end in the longitudinal direction of the 2 nd elastic region to an outer side in the longitudinal direction, the 1 st elastic region is disposed inward in the longitudinal direction of the 3 rd elastic region from the outer end in the longitudinal direction, or extends from the outer end in the longitudinal direction of the 3 rd elastic region to the outer side in the longitudinal direction by a length shorter than the predetermined length.

In the absorbent article, the 2 nd elastic region may be provided on an inner side in the longitudinal direction than the joint portion of the back waistline region and on an outer side than the center line in the longitudinal direction of the absorbent article, the back waistline region may have another elastic region arranged along the width direction on an outer side in the longitudinal direction than the 2 nd elastic region, the another elastic region may overlap with the joint portion in the longitudinal direction, and one end in the longitudinal direction of the 1 st elastic region may be arranged on an inner side in the longitudinal direction than an inner end in the longitudinal direction of the another elastic region.

Other features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

Effect of the utility model

According to the present invention, an absorbent article can be provided which has improved conformability to at least the lower abdomen or the buttocks and improved appearance (appearance) when worn, while maintaining conformability to the crotch portion by the central elastic member.

Drawings

Fig. 1 is a schematic perspective view of an underpants type disposable diaper 1 according to embodiment 1.

Fig. 2 is a schematic plan view of the diaper 1 of embodiment 1 in an unfolded and extended state as viewed from the skin side.

Fig. 3 is a schematic sectional view taken along line a-a in fig. 2.

Fig. 4 is a schematic sectional view of B-B in fig. 2.

Fig. 5A is an enlarged view of the intersection region 150 of embodiment 1, and fig. 5B is a view showing an extended state of the intersection region 150 of fig. 5A.

Fig. 6A is an enlarged view of an example of the intersection region 150, and fig. 6B is a view showing an extended state of the intersection region 150 of fig. 6A.

Fig. 7A is an enlarged view of an example of the intersection region 150 of embodiment 1, and fig. 7B is a view showing an extended state of the intersection region 150 of fig. 7A.

Fig. 8A is an enlarged view of another example of the intersection region 150, and fig. 8B is a view showing an extended state of the intersection region 150 of fig. 8A.

Fig. 9 is a diagram for explaining modification 1 of embodiment 1.

Fig. 10 is a diagram for explaining modification 2 of embodiment 1.

Fig. 11 is a diagram for explaining modification 3 of embodiment 1.

Fig. 12 is a schematic plan view of the diaper 1 of embodiment 2 in an unfolded and extended state as viewed from the skin side.

Description of the reference numerals

1: diapers (absorbent articles); 10: an exterior body; 11F: a front waistline region; 11R: a back waistline region; 12: a crotch region; 13F: a lateral end; 13R: a lateral end; 13 FR: a joint portion; 20: an absorbent main body; 20 e: an end portion; 21: an absorbent body; 22: a core cladding sheet; 23: a topsheet; 24: a membrane; 25: a negative film; 26: a leg elastic member; 30: a central elastic member; 50: a central flexible shaft; 55: a side flexible shaft; 60: cutting; 110: an outer-covering top sheet; 120F: the front side is externally provided with a bottom sheet; 120R: a back side outer film; 130F: a front waist elastic member; 130Fn 1: a front waist elastic member; 130Fn 2: a front waist elastic member; 130R: a back waist elastic member; 130 Ra: an elastic region; 130Rn 1: a back waist elastic member; 130Rn 2: a back waist elastic member; 140: a rear leg elastic member; 140 c: a bending section; 140 s: a straight portion; 150: a crossover region; 150': a crossover region; CL: a central line; x: a 2 nd elastic region; x': an extended area; y: 1 st elastic region; y': an extended area; yer: one end; z: and a 3 rd elastic region.

Detailed Description

At least the following matters will be apparent from the description of the present specification and the accompanying drawings.

According to such an absorbent article, the 1 st elastic region is a region in which a tensile force acts in the longitudinal direction of the absorbent article, and in an extended state, a tensile force in the longitudinal direction also acts on the 1 st elastic region and its extended region. The 2 nd elastic region is a region in which a tensile force acts in the width direction, and in the stretched state, a tensile force in the width direction also acts on the 2 nd elastic region and its extended region. In the crossing region where the 1 st stress region and the 2 nd stress region cross each other, a tensile force toward the outside in the longitudinal direction and a tensile force toward the outside in the width direction act when worn. At this time, if the length in the width direction of the intersecting region (i.e., the length in the width direction of the 1 st elastic region or its extended region) is longer than the length in the length direction of the intersecting region (i.e., the length in the length direction of the 2 nd elastic region), a force toward the outside in the width direction is easily applied to the intersecting region, but the force is dispersed and is hardly applied to the central portion of the intersecting region. However, if the length in the width direction of the intersecting region is made shorter than the length in the longitudinal direction, a force toward the outside in the width direction is likely to act on the central portion of the intersecting region. Thus, the fitting property of the 2 nd elastic region can be improved and the movement can be facilitated even in a state where the fitting property of the crotch portion by the expansion and contraction of the 1 st elastic region is maintained. Further, since a force acts on the central portion of the intersecting region, the intersecting region does not collapse, and the appearance when worn is improved. In addition, even in the intersecting region between the extended regions where the 1 st elastic region and the 2 nd elastic region do not intersect, similar effects can be obtained by utilizing the stretching force acting in the longitudinal direction of the extended region of the 1 st elastic region and the stretching force acting in the width direction of the extended region of the 2 nd elastic region as described above.

The absorbent article desirably has the 1 st elastic region overlapping at least one of the front waistline region and the back waistline region when viewed in the thickness direction.

According to such an absorbent article, the 1 st elastic region that pulls up the crotch portion is extended to the waistline region, whereby the entire crotch portion is pulled up, and the fit is improved. By pulling up the crotch part, the looseness of the absorbent main body is easily eliminated, and the appearance (appearance) when worn is also improved.

The absorbent article desirably has the 2 nd elastic region disposed over the entire region of the absorbent body in the width direction, the 2 nd elastic region intersecting the 1 st elastic region.

According to such an absorbent article, the 2 nd elastic region can facilitate the application of a force in the width direction to the absorbent body, and the fitting property of the 2 nd elastic region can be maintained. In addition, the 2 nd elastic region and the 1 st elastic region intersect, so that the lifting force of the 1 st elastic region is applied to the 2 nd elastic region, and the 1 st elastic region and the 2 nd elastic region are interlocked to improve the lifting performance of the crotch part. This also improves the ease of movement and improves the appearance (appearance) when worn.

In the absorbent article, it is desirable that 1 or more flexible shafts be provided along the longitudinal direction of the absorber.

According to such an absorbent article, the absorbent body is easily bent along the flexible axis when worn, and the fit to the crotch portion is improved by the presence of irregularities in the absorbent body. In addition, the crotch portion is neat and easy to move. By making the crotch portion neat, the appearance (look) when worn also becomes good.

The absorbent article desirably has a pair of flexible shafts along the longitudinal direction of the absorber.

According to such an absorbent article, when the absorbent article is worn, the absorbent body can be more easily bent along the pair of flexible axes, and irregularities can be formed in the absorbent body. Thus, the fit of the crotch portion is improved, and the crotch portion is neat and easy to move. Further, the crotch portion is less likely to be loosened by the fitting, and the appearance (appearance) when worn is also improved.

In the absorbent article, it is desirable that a central flexible shaft is provided along the longitudinal direction at a central portion in the width direction of the absorbent body, and a pair of side flexible shafts is provided along the longitudinal direction at positions further outside in the width direction of the absorbent body than the central flexible shaft.

According to such an absorbent article, when the absorbent article is worn, the absorbent body is more likely to bend along the central flexible axis and the pair of side flexible axes, and unevenness is more likely to occur in the absorbent body. By being easily bent, the crotch can be more easily fitted and moved. In addition, the crotch part is less likely to be loosened, and the appearance (appearance) when worn is further improved.

In the absorbent article, it is desirable that a central flexible shaft be provided along the longitudinal direction in a central portion in the width direction of the absorbent body, and at least a part of the central flexible shaft and at least a part of the 1 st elastic region overlap each other when viewed in the thickness direction.

According to such an absorbent article, the absorbent body is easily bent along the flexible axis when worn by the wearer, and thus is easily attached to the crotch portion. In addition, since the absorbent article is stretched in the longitudinal direction by the 1 st elastic region, the fit in the crotch portion is further improved by overlapping the 1 st elastic region and the central flexible axis when viewed in the thickness direction. Further, due to such improvement of fit, the crotch portion is less likely to be loosened, and the appearance at the time of wearing is also improved.

The absorbent article desirably has the 2 nd elastic region on the inner side in the longitudinal direction than the joint portion of the back waistline region and on the outer side than the center line in the longitudinal direction of the absorbent article, an inner end portion in the longitudinal direction of the front waist region has a 3 rd elastic region arranged along the width direction, the 1 st elastic region extends a predetermined length from an outer end in the longitudinal direction of the 2 nd elastic region to an outer side in the longitudinal direction, the 1 st elastic region is disposed inward in the longitudinal direction of the 3 rd elastic region from the outer end in the longitudinal direction, or extends from the outer end in the longitudinal direction of the 3 rd elastic region to the outer side in the longitudinal direction by a length shorter than the predetermined length.

According to such an absorbent article, in the back waistline region, the 1 st elastic region and the 2 nd elastic region intersect each other, and the 1 st elastic region extends outward in the longitudinal direction, so that the 1 st elastic region and the 2 nd elastic region are linked to make it easier to pull up the crotch portion, thereby improving the fit of the buttocks. On the other hand, since the front waistline region has smaller irregularities in body shape than the buttocks side, the length in the longitudinal direction of the 1 st elastic region can be shortened to reduce the pulling force, and the absorption region can be formed to be large at the time of urination.

In the absorbent article, it is desirable that the 2 nd elastic region is provided on the inner side in the longitudinal direction than the joint portion of the back waistline region and on the outer side than the center line in the longitudinal direction of the absorbent article, the back waistline region is provided on the outer side in the longitudinal direction than the 2 nd elastic region with another elastic region arranged along the width direction, the another elastic region overlaps the joint portion in the longitudinal direction, and one end in the longitudinal direction of the 1 st elastic region is arranged on the inner side in the longitudinal direction than an inner end in the longitudinal direction of the another elastic region.

According to such an absorbent article, the other elastic region is a region for fitting the waist of the wearer and is located above the defecation position. If the 1 st elastic member for improving the fit in the crotch portion is present up to this region, the absorbent article may contact the skin excessively and give a feeling of discomfort. By disposing the outer end portion in the longitudinal direction of the 1 st elastic member at a position not reaching such another elastic region, appropriate adhesiveness can be provided.

In the embodiment 1, the following embodiments are not to be considered in all respects

Hereinafter, the embodiments will be described by taking an underpants type disposable diaper for an adult as an example of the absorbent article of the present invention. However, the present invention is not limited to the above, and the absorbent article of the present invention can be applied to underpants type disposable diapers for infants, underpants type sanitary napkins, and the like.

< Structure of pants-type Disposable diaper 1>

First, the structure of a pants-type disposable diaper 1 (hereinafter referred to as "diaper") as an example of an absorbent article will be described with reference to fig. 1 to 4.

Fig. 1 is a schematic perspective view of an underpants type disposable diaper 1 according to embodiment 1. Fig. 2 is a schematic plan view of the diaper 1 of embodiment 1 in an unfolded and extended state as viewed from the skin side. Fig. 3 is a schematic sectional view taken along line a-a in fig. 2. Fig. 4 is a schematic sectional view of B-B in fig. 2.

The diaper 1 has a "vertical direction", a "width direction" orthogonal to the vertical direction, and a "front-rear direction" orthogonal to the vertical direction and the width direction in an underpants type state when worn as shown in fig. 1. In the vertical direction, the upper side corresponds to the waist opening side of the wearer, and the lower side corresponds to the crotch side of the wearer. In addition, with respect to the front-rear direction, the front side corresponds to the abdomen side of the wearer, and the rear side corresponds to the back side of the wearer.

In the developed and extended state shown in fig. 2, the diaper 1 has a longitudinal direction, a width direction, and a thickness direction (direction passing through the paper in fig. 2) as three directions orthogonal to each other. The longitudinal direction is along the above-described vertical direction. Further, one side in the longitudinal direction corresponds to the ventral side (front side), and the other side corresponds to the dorsal side (rear side). Further, the outer side in the longitudinal direction corresponds to the upper side (waist opening side) in the up-down direction, and the inner side in the longitudinal direction corresponds to the lower side (crotch side) in the up-down direction. In addition, since the longitudinal direction and the vertical direction are directions communicating with each other as described above, hereinafter, for convenience of explanation, the vertical direction may be used instead of the longitudinal direction in the expanded state. On the other hand, the width direction is the same as the width direction in the pants-type state described above. In the thickness direction, one side corresponds to the skin side in contact with the body of the wearer, and the other side corresponds to the non-skin side (see fig. 3).

Here, the "developed state" refers to a state in which the diaper 1 is developed in a plane by separating the front waistline region 11F and the rear waistline region 11R, which will be described later, by unfastening the joints on both sides in the width direction of the diaper 1 in the pants-type state in fig. 1, and opening the diaper 1 in the vertical direction. The "stretched state" refers to a state in which the product (diaper 1) is stretched without wrinkles, and specifically, refers to a state in which the product is stretched until the dimensions of the members (for example, the outer covering 10, the absorbent main body 20, and the like described later) constituting the diaper 1 become the same as or a length close to the dimensions of the members alone.

As shown in fig. 1, the diaper 1 includes an outer package 10 and an absorbent main body 20 for absorbing excrement such as urine.

The exterior body 10 has a waistline region 11 positioned at the waistline of the wearer and a crotch region 12 positioned at the crotch of the wearer. The waistline region 11 has a front waistline region 11F covering the abdominal side of the wearer and a rear waistline region 11R covering the back side of the wearer. As shown in fig. 2, the upper end and the side end of the front waist region 11F are the upper end and the side end of a sheet (herein, the front outer cover 120F described later) forming the outer shape of the outer cover 10 on the abdomen side, and the lower end is the position of a line UL1 connecting the intersections of the outer cover 10 on the abdomen side and the absorbent main body 20. A region surrounded by the upper end, the side ends, the curved or straight line portion connected to the line UL1 from the lower end of the side ends, and the lower end is the front waistline region 11F. The upper end and the side end of the back waistline region 11R are the upper end and the side end of a sheet (herein, the back side outer chassis 120R described later) forming the outer shape of the outer cover 10 on the back side, and the lower end is the position of a line UL2 connecting the intersection points of the back side outer cover 10 and the absorbent main body 20. The region surrounded by the upper end, the side ends, the curved or straight line portion connected from the lower end of the side ends to the line UL2, and the lower end is the rear waistline region 11R. The crotch region 12 is a region between the front waistline region 11F and the rear waistline region 11R.

In a state where the diaper 1 is unfolded and extended, the front waistline region 11F is positioned at one end side in the longitudinal direction of the absorbent main body 20, and the rear waistline region 11R is positioned at the other end side in the longitudinal direction of the absorbent main body 20.

In addition, the front waistline region 11F and the back waistline region 11R have joint portions 13FR that join the pair of side end portions 13F of the front waistline region 11F and the pair of side end portions 13R of the back waistline region 11R, respectively, in the width direction of the diaper 1. The joint portion 13FR forms a pants-type disposable diaper 1.

< Structure of outer package 10 >

As shown in fig. 2 and 3, the exterior body 10 includes: an exterior topsheet 110, a front side exterior backsheet 120F, a rear side exterior backsheet 120R, a front waist elastic member 130F, a rear waist elastic member 130R, and a rear leg elastic member 140.

The exterior topsheet 110 is disposed from the front waistline region 11F to the back waistline region 11R through the crotch region 12 (fig. 3). The width (length in the width direction) of the exterior topsheet 110 in the front waistline region 11F and the back waistline region 11R is larger than the width (length in the width direction) of the exterior topsheet 110 in the crotch region 12 (fig. 2). The exterior top sheet 110 may be formed of a through-air nonwoven fabric, a spunbond nonwoven fabric, an SMS nonwoven fabric (spunbond/meltblown/spunbond nonwoven fabric), a waterproof film, or the like.

As shown in fig. 3, the front outer back sheet 120F is provided in the front waistline region 11F on the non-skin side of the outer top sheet 110. The outer end (upper end) of the front outer chassis 120F in the longitudinal direction is folded back toward the skin. The folded portion of the front outer chassis 120F surrounds one end (outer end) in the longitudinal direction of the outer chassis 110. The outer end (upper end) of the front outer chassis 120F in the longitudinal direction may not be folded back.

Similarly, as shown in fig. 3, the rear outer chassis 120R is provided in the rear waistline region 11R on the non-skin side of the outer chassis top sheet 110. The outer end (upper end) of the rear outer chassis 120R in the longitudinal direction is folded back toward the skin. The folded portion of the rear outer chassis 120R surrounds the other end (outer end) in the longitudinal direction of the outer topsheet 110. The outer end (upper end) of the front outer chassis 120F in the longitudinal direction may not be folded back.

The front outer bottom sheet 120F and the rear outer bottom sheet 120R may be formed of a through-air nonwoven fabric, a spunbond nonwoven fabric, an SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), or the like.

The front waist elastic member 130F is provided between the exterior topsheet 110 and the front side exterior backsheet 120F in the front waist region 11F (see fig. 3). The front waistline elastic member 130F is, for example, a plurality of rubber bands or the like. The front waist elastic member 130F is bonded and fixed with an adhesive such as a hot melt adhesive along the width direction in a state of being stretched in the width direction. The front waist elastic members 130F provide the front waist region 11F with stretchability in the width direction.

The back waist elastic member 130R is provided between the exterior topsheet 110 and the back side exterior backsheet 120R in the back waist region 11R (see fig. 3). The back waistline elastic member 130R is, for example, a plurality of rubber bands or the like. The back waist elastic member 130R is bonded and fixed with an adhesive such as a hot melt adhesive along the width direction in a state of being stretched in the direction. The back waistline elastic member 130R provides the back waistline region 11R with stretchability in the width direction.

In embodiment 1, the rear leg-surrounding elastic members 140 are provided between the exterior topsheet 110 and the rear side exterior backsheet 120R in the rear waistline region 11R. As shown in fig. 2, the rear leg-surrounding elastic member 140 has: a curved portion 140c that is curved obliquely downward from both side ends 13R in the width direction of the rear waistline region 11R toward the inside in the longitudinal direction of the rear waistline region 11R and toward the inside in the width direction; and a straight portion 140s arranged along the width direction at a central portion in the width direction. For example, the rear leg-surrounding elastic member 140 may be a plurality of elastic bands, a band-shaped elastic sheet having elasticity, or the like. The rear leg-surrounding elastic member 140 is bonded and fixed in an extended state by an adhesive such as a hot-melt adhesive.

However, the present invention is not limited to the above, and the front waistline region 11F may be provided with elastic members similar to the rear leg-surrounding elastic members 140 of the rear waistline region 11R.

< construction of absorbent body 20 >

The absorbent main body 20 is provided on the skin side of the outer body 10 (see fig. 3). As shown in fig. 4, the absorbent main body 20 includes: a liquid-absorbent body (absorbent core) 21, a core wrap sheet 22 covering the outer peripheral surface of the absorbent body 21, a top sheet 23, a film sheet 24, and a back sheet 25.

The absorber 21 is provided on the skin side in the thickness direction of the outer package 10 in at least the crotch region 12. The absorbent body 21 is a member formed by laminating liquid absorbent materials, and can absorb excrement such as urine. As the liquid-absorbent material, for example, liquid-absorbent fibers such as pulp fibers, super-absorbent polymers, and the like can be used. The shape of the absorber 21 is not limited to the shape extending in the longitudinal direction and having a portion tapered inward in the width direction as shown in fig. 2, and may be, for example, a substantially rectangular shape in plan view.

As a material suitable for the core wrap sheet 25, tissue paper, nonwoven fabric, or the like can be exemplified. However, these core wrap sheets 25 are not necessarily structured.

The top sheet 23 is a sheet forming a skin-contacting surface that can directly contact the skin of the wearer, and is, for example, a liquid-permeable nonwoven fabric having a larger planar size than the absorbent body 21. The film sheet 24 is a sheet-like member covering the absorbent body 21 from the non-skin side, and is a sheet having a larger planar size than the absorbent body 21. Examples of the film sheet 24 include a liquid-impermeable leakproof sheet such as polyethylene or polypropylene.

The back sheet 25 is a liquid-impermeable sheet covering the absorbent body 21 from the non-skin side. As shown in fig. 4, the dimension of the back sheet 25 in the width direction is sufficiently larger than that of the film sheet 24, and both ends in the width direction are folded back toward the center (inner side) in the width direction at a folded-back position where the end 20e in the width direction of the absorbent main body 20 is formed. In addition, the back sheet 25 is folded back so as to sandwich both ends in the width direction of the film sheet 24 when folded back. In the vicinity of the folded position, leg-surrounding elastic members 26 such as rubber bands are fixed in a state of being stretched in the longitudinal direction, thereby imparting stretchability to the leg-surrounding.

The diaper 1 further includes a central elastic member 30 such as a plurality of elastic bands disposed along the longitudinal direction of the absorber 21 at the central portion in the width direction of the diaper 1. The central elastic member 30 is provided on the non-skin side in the thickness direction of the absorbent body 21, and in embodiment 1, is provided between the film 24 and the back sheet 25. In

embodiment

1, 2 central elastic members 30 are provided, but the number is not limited to this, and a single member or a plurality of members may be provided. The central elastic member 30 is not limited to a rubber band, and may be, for example, a band-shaped elastic sheet having elasticity. In fig. 2, a portion of the central elastic member 30 where stretchability is exhibited (a portion of the effective length) is shown by a thick solid line. As shown in fig. 2, a region formed by the 2 central elastic members 30 along the longitudinal direction is referred to as a 1 st elastic region Y (a portion indicated by a left lower oblique line). In the case where there are a plurality of elastic members, the length in the width direction between the outermost elastic members in the width direction is set to the length in the width direction of the 1 st elastic region Y. The length of the 1 st elastic region Y in the longitudinal direction is set to the length of the effective length of the central elastic member 30. In the case where the elastic members are single or sheet-like, the length of each elastic member or sheet in the width direction becomes the length of the 1 st elastic region Y in the width direction, and the length of the effective length of each elastic member or sheet becomes the length of the 1 st elastic region Y in the length direction.

By providing the diaper 1 with stretchability in the longitudinal direction by the 1 st elastic region Y formed by the central elastic member 30, the crotch portion is more easily pulled up. This improves the fit of the crotch portion.

Further, it is preferable that the 1 st elastic region Y overlaps at least one of the front waistline region 11F and the back waistline region 11R when viewed in the thickness direction. In the 1 st embodiment, as shown in fig. 2 and 3, the 1 st elastic region Y overlaps the back waistline region 11R when viewed in the thickness direction. By extending the 1 st elastic region Y for lifting the crotch part to the back waistline region 11R, the entire crotch part is lifted, and the fit of the buttocks is improved. This makes it easy to eliminate the looseness of the absorbent main body 20, and the appearance (appearance) of the diaper 1 when worn is also improved.

Further, as shown in fig. 2, the 1 st elastic region Y intersects the linear portions 140s of the rear leg-surrounding elastic members 140 in the rear waistline region 11R. If a region from the elastic member forming the outermost side in the longitudinal direction (the uppermost side in the vertical direction) to the elastic member forming the innermost side in the longitudinal direction (the lowermost side in the vertical direction) of the linear portion 140s is set as the 2 nd elastic region X (that is, the entire region of the linear portion 140s is the 2 nd elastic region X here), the 2 nd elastic region X is a region disposed in the width direction at a position inside in the longitudinal direction from the joining portion 13FR of the back waist region 11R and outside from the center line CL in the longitudinal direction of the diaper 1. In the back waistline region 11R, the 1 st elastic region Y formed by the central elastic member 30 intersects with the 2 nd elastic region X. In addition, when the linear portion 140s is formed of a band-shaped elastic sheet having elasticity or the like, a region of the elastic sheet joined as the linear portion 140s becomes the 2 nd elastic region X.

In addition, the 2 nd elastic region X is provided over the entire region in the width direction of the absorbent body 21. The 2 nd elastic region X is likely to exert a force in the width direction on the absorber 21, and the adhesiveness of the 2 nd elastic region X (i.e., the adhesiveness of the buttocks here) can be maintained. Further, by intersecting the 2 nd elastic region X and the 1 st elastic region Y, the lifting force of the 1 st elastic region Y is applied to the 2 nd elastic region X, and the 1 st elastic region Y and the 2 nd elastic region X are interlocked with each other, thereby improving the lifting performance of the crotch region 12. This also improves the ease of movement, and the appearance (appearance) when worn is also improved.

In embodiment 1, the 2 nd elastic region X is formed in the back waistline region 11R, but the invention is not limited thereto. That is, the 2 nd elastic region X may be disposed along the width direction at a position that is longitudinally inward of at least one joint 13FR of the joint 13FR in the front waistline region 11F and the joint 13FR in the back waistline region 11R and outward of the center line CL in the longitudinal direction of the diaper 1. With such a configuration, since the fitting property of the 2 nd elastic region X is improved by the tensile force in the width direction due to the 2 nd elastic region X, for example, in the case where the 2 nd elastic region X is formed in the front waistline region 11F, the periphery of the lower abdomen can be fitted without being loosened, and in the case where the second elastic region X is formed in the rear waistline region 11R, the fitting property of the buttocks can be improved.

In addition, in embodiment 1, the 2 nd elastic region X is provided over the entire region in the width direction of the absorbent body 21, but is not limited thereto. For example, the 2 nd elastic region X may be provided so as to cross a part of the absorbent body 21 in the width direction, or may be intermittently cut. Details thereof will be described later.

Next, an intersecting region 150 (see fig. 2) where the 1 st elastic region Y and the 2 nd elastic region X intersect will be described. Fig. 5A is an enlarged view of the intersection region 150 of embodiment 1, and fig. 5B is a view showing an extended state of the intersection region 150 of fig. 5A. Fig. 6A is an enlarged view of an example of the intersection region 150, and fig. 6B is a view showing an extended state of the intersection region 150 of fig. 6A. Fig. 7A is an enlarged view of an example of the intersection region 150 of embodiment 1, and fig. 7B is a view showing an extended state of the intersection region 150 of fig. 7A. Fig. 8A is an enlarged view of another example of the intersection region 150, and fig. 8B is a view showing an extended state of the intersection region 150 of fig. 8A.

The 1 st elastic region Y is a region to which stretchability in the longitudinal direction is imparted to the diaper 1, and the 2 nd elastic region X is a region to which stretchability in the width direction is imparted. In order to make it easy to visually confirm how the tensile force applied to the intersecting region 150 where the 1 st elastic region Y and the 2 nd elastic region X intersect acts in the longitudinal direction and the width direction, 3 lines having a predetermined thickness such as 5 marks are drawn in the longitudinal direction and 5 lines such as marks are drawn in the width direction so as to form a grid of 5mm width on the non-skin side surface of the intersecting region 150, and fig. 5A shows a state where the intersecting region 150 is viewed from the non-skin side. In addition, the length in the width direction of the intersection region 150 of embodiment 1 (the length in the width direction of the 1 st elastic region Y) L1 is shorter than the length in the longitudinal direction (the length in the longitudinal direction of the 2 nd elastic region X) L2 (L1< L2).

Unlike embodiment 1, the intersection region 150 shown in fig. 6A is an example of a case where the length L1 in the width direction of the intersection region 150 is longer than the length L2 in the longitudinal direction (L1> L2). Similarly, 5 lines having a predetermined thickness such as 3 marks are drawn in the longitudinal direction and 3 lines having a predetermined thickness such as 5mm wide grids are drawn in the width direction on the non-skin side surface of the intersection region 150.

When the diaper 1 is in the unfolded and stretched state as shown in fig. 2, as shown in fig. 5B, a stretching force acts in the longitudinal direction (vertical direction) in the 1 st elastic region Y and a stretching force acts in the width direction in the 2 nd elastic region X in the intersecting region 150. When 3 lines extending in the longitudinal direction are observed, 2 lines on the outer side in the width direction are deformed so that the line width expands in the width direction and expands outward in the width direction. The central line is not deformed, but the line width is expanded in the width direction. That is, in the intersecting region 150 where the length L1 in the width direction is shorter than the length L2 in the longitudinal direction, the tensile force in the width direction acts on the central portion.

On the other hand, fig. 6B also shows the extended state of the intersection region 150, and when 5 lines extending in the longitudinal direction are similarly observed in the intersection region 150 in which the length L1 in the width direction is longer than the length L2 in the longitudinal direction, the line width is deformed so as to expand in the width direction and expand in the width direction outward as going outward in the width direction, but the deformation and the expansion of the line width are not seen in the line in the center. That is, the tensile force in the width direction is less likely to act on the central portion of the intersecting region 150.

Next, the intersection region 150 shown in fig. 7A is of the following structure. First, the 1 st elastic region Y of the diaper 1 of embodiment 1 does not extend to the intersecting region 150, but intersects an extended region Y' which is an extended region of the 1 st elastic region Y. The 2 nd elastic region X is present at a position further outward in the width direction than the intersecting region 150, but in the intersecting region 150, an extended region X' which is an extended region of the 2 nd elastic region X intersects. In the same manner as the intersection region 150 of fig. 5A, 3 lines having a predetermined thickness are drawn in the longitudinal direction and 5 lines having a predetermined thickness are drawn in the width direction in the intersection region 150.

In the crossing region 150 shown in fig. 8A, neither the 1 st elastic region Y nor the 2 nd elastic region X crossing the crossing region 150 shown in fig. 6A extends to the crossing region 150, but an extension region Y 'that is an extension region of the 1 st elastic region Y crosses an extension region X' that is an extension region of the 2 nd elastic region X. In the same manner as the intersection region 150 of fig. 6A, 5 lines are drawn in the longitudinal direction and 3 lines having a predetermined thickness are drawn in the width direction in the intersection region 150.

When the diaper 1 is set in the unfolded and extended state as shown in fig. 2, when 3 lines extending in the longitudinal direction are observed, as shown in fig. 7B, 2 lines on the outer side in the width direction are deformed so that the line width spreads in the width direction and spreads outward in the width direction. The central line is not deformed, but the line width is expanded in the width direction. That is, even in the intersecting region 150 where the extended region Y 'and the extended region X' intersect with each other, it is found that the tensile force in the width direction acts on the intersecting region 150 and the length L1 in the width direction of the intersecting region 150 is made shorter than the length L2 in the length direction (L1< L2) so that the tensile force in the width direction acts on the central portion of the intersecting region 150.

As shown in fig. 8B, when 5 lines extending in the longitudinal direction when the intersection region 150 shown in fig. 8A is extended are observed, the line width expands in the width direction and deforms outward in the width direction as the lines extend outward in the width direction, but the deformation and the expansion of the line width are not seen in the central line. That is, it is found that, in the case where the intersection region 150 is formed such that the extended region Y 'and the extended region X' intersect with each other and the length L1 in the width direction of the intersection region 150 is longer than the length L2 in the longitudinal direction (L1> L2), although tensile forces in the longitudinal direction and the width direction act on the intersection region 150, forces are hardly applied to the central portion of the intersection region 150.

Therefore, as shown in fig. 5A to 8B, the 1 st elastic region Y and its extension region Y 'are referred to as the 1 st stress region, the 2 nd elastic region X and its extension region X' are referred to as the 2 nd stress region, and the relationship between the tensile force in the widthwise outer side and the lengthwise outer side with respect to the intersecting region 150 where the 1 st stress region and the 2 nd stress region intersect and the length in the widthwise direction and the lengthwise direction of the intersecting region 150 is as follows.

First, as shown in fig. 6B and 8B, if the length L1 in the width direction of the intersection region 150 (i.e., the length in the width direction of the 1 st elastic region Y or its extension region Y') is longer than the length L2 in the length direction of the intersection region 150 (i.e., the length in the length direction of the 2 nd elastic region X) (L1> L2), a force is easily applied to the outside in the width direction of the intersection region 150, but the force is dispersed and is hardly applied to the central portion. This may make it difficult for the central portion of the intersection region 150 to fit the body of the wearer, and the central portion may be loose.

In this regard, as shown in fig. 5B and 7B, when the length L1 in the width direction of the intersection region 150 is shorter than the length L2 in the length direction of the intersection region 150 (L1< L2), a force toward the outside in the width direction is likely to act on the central portion of the intersection region 150. Thus, in a state where the fit of the crotch portion by the 1 st stress region is maintained, the intersecting region 150 is not loosened by the 2 nd stress region, and the crotch portion is easily fitted to the body, and the appearance (appearance) when worn is also improved. Even in the intersecting region between the extended regions (Y ', X') where the 1 st elastic region Y and the 2 nd elastic region X do not intersect, the same effect is obtained because the tensile force in the longitudinal direction and the tensile force in the width direction are applied to the intersecting region 150 by the extended regions (Y ', X') as described above.

Returning to fig. 2 to 4, in the diaper 1 of embodiment 1, a central flexible shaft 50 is provided along the longitudinal direction at the central portion in the width direction of the absorbent body 21, and a pair of side flexible shafts 55 are provided along the longitudinal direction at positions further outward in the width direction of the absorbent body 21 than the central flexible shaft 50. In addition, the central flexible shaft 50 and the pair of side flexible shafts 55 are applied only to the region where the absorber 21 exists.

The central flexible shaft 50 and the pair of side flexible shafts 55 are members for facilitating bending of the absorbent main body 20 at the portions where these flexible shafts are provided. As a method of forming the flexible shaft, there can be exemplified: 1) a method of forming slits such as slits or narrow notches in the absorbent body and using them as flexible shafts; 2) a method of forming an embossed groove in the absorbent body and using the embossed groove as a flexible shaft; 3) a method of forming a portion where the constituent material is reduced or a portion where the constituent material is not laminated in a continuous line or an intermittent line in the absorbent body, and using the portion as a flexible shaft.

The central flexible shaft 50 and the pair of side flexible shafts 55 of embodiment 1 are portions formed in the absorber 21 so that constituent materials are not laminated. By the central flexible shaft 50 and the pair of side flexible shafts 55, the absorber 21 is more easily bent along the central flexible shaft 50 and the pair of side flexible shafts 55 when worn, and unevenness is more easily generated in the absorber 21. This makes the diaper 1 fit to the crotch portion and is easy to move, and the appearance (look) in the worn state is further improved.

In addition, as shown in fig. 2, at least a part of the central flexible shaft 50 and at least a part of the 1 st elastic region Y overlap when viewed in the thickness direction. The absorbent member 21 is easily bent along the flexible shaft 50 when worn, and is easily attached to the crotch portion by the central flexible shaft 50. Further, since the diaper 1 is stretched in the longitudinal direction by the 1 st elastic region Y, the fit in the crotch portion is further improved by overlapping the 1 st elastic region Y and the central flexible shaft 50 as viewed in the thickness direction. By such improvement of the fit, the wearer can move more easily, and the appearance (appearance) in a worn state is also improved.

In embodiment 1, the absorber 21 is provided with the center flexible shaft 50 and the pair of side flexible shafts 55, but the arrangement and number of the center flexible shaft 50 and the pair of side flexible shafts 55 are not limited to this, and 1 or more flexible shafts may be provided along the longitudinal direction of the absorber 21. For example, only one pair of flexible shafts may be provided along the longitudinal direction of the absorber 21. The flexible shaft is a member for facilitating the bending of the absorber 21 along the flexible shaft when the diaper 1 is worn, and the position and number of the flexible shafts can be changed according to the wearer of the diaper, the size of the diaper, and the like. By providing such a flexible shaft, not only the fit of the crotch portion is improved and the movement is facilitated, but also the crotch portion does not collapse and the appearance (appearance) when worn is improved.

As shown in fig. 2, the plurality of rear waistline elastic members 130R provided in the rear waistline region 11R are, unlike the 2 nd elastic region X, another elastic region (referred to as an elastic region 130Ra) disposed along the width direction at a position further outside in the longitudinal direction than the 2 nd elastic region X. In addition, the elastic region 130Ra overlaps the joint portion 13FR in the longitudinal direction. Further, the longitudinal one end Yer of the 1 st elastic region Y in the back waistline region 11R is disposed further inward in the longitudinal direction than the longitudinal inner end 130Ran of the elastic region 130 Ra. The elastic region 130Ra is a region for fitting the waist of the wearer and is located above the defecation position. If the 1 st elastic region Y to the elastic region 130Ra, which improves the fit in the crotch portion, are present, there is a possibility that the diaper 1 may contact the skin excessively and give a feeling of discomfort. Therefore, by disposing the outer end Yer in the longitudinal direction of the 1 st elastic region Y at a position not reaching the elastic region 130Ra, appropriate adhesiveness can be imparted.

< modification of the 1 st and 2 nd stress regions >

Hereinafter, modifications of the 1 st stress region and the 2 nd stress region will be described with reference to the drawings.

(modification 1)

Fig. 9 is a diagram for explaining modification 1 of embodiment 1. The present embodiment is different from embodiment 1 in that a cut 60 is provided by cutting a part of the rear waistline region 11R from the non-skin side surface. The portion where the slit 60 exists is also cut into the rear leg-surrounding elastic member 140 (the linear portion 140 s). Further, rear leg hole elastic members 140 (straight portions 140s) are provided at positions outward of both side ends in the width direction of the notch 60. As illustrated in fig. 7A, since the region where the slit 60 is present is an extended region X 'on which a tensile force acts in the width direction of the linear portion 140s of the 2 nd elastic region X, the intersecting region 150 in fig. 9 is a region where the 1 st elastic region Y intersects the extended region X'. Even in the extended region X', since the length L1 in the width direction of the intersecting region 150 is shorter than the length L2 in the longitudinal direction (in the partially enlarged view of fig. 9, the extended lines of the rear leg surrounding elastic members 140 of the straight portion 140s are indicated by two-dot chain lines, and the length L2 between the upper and lower ends thereof), a tensile force in the width direction acts on the central portion of the intersecting region 150 as shown in fig. 7B. This makes it easy for the cross region 150 of fig. 9 to adhere to the buttocks, and the cross region 150 does not collapse, so that the appearance (appearance) when worn is also improved.

(modification 2)

Fig. 10 is a diagram for explaining modification 2 of embodiment 1. The difference from the foregoing embodiment 1 is that the length of each central elastic member 30 extending to the back side in the longitudinal direction is shortened, and the 1 st elastic region Y does not intersect with the 2 nd elastic region X. Therefore, in the intersecting region 150 of modification 2, the 2 nd elastic region X intersects with the extended region Y' in which the 1 st elastic region Y is extended. As shown in fig. 7B, the extension region Y' is a region to which a tensile force in the longitudinal direction acts when the diaper 1 is extended. Accordingly, in the intersecting region 150 where the 2 nd elastic region X intersects the extended region Y ', the tensile force in the longitudinal direction by the extended region Y' also acts, and the tensile force in the width direction by the 2 nd elastic region X acts, and the length L1 in the width direction of the intersecting region 150 (in the partially enlarged view of fig. 10, the extensions of the respective central elastic members 30 are indicated by broken lines in the longitudinal direction, and the length L1 in the width direction between the extensions) is shorter than the length L2 in the length direction, so the tensile force in the width direction acts on the central portion of the intersecting region 150. This provides the same effects as described above.

(modification 3)

Fig. 11 is a diagram for explaining modification 3 of embodiment 1. The difference from the above-described embodiment 1 is that the 1 st elastic region Y and the 2 nd elastic region X do not intersect in the intersecting region 150 because the cut 60 is provided by cutting a part of the back waistline region 11R from the non-skin side surface and the length of the 1 st elastic region Y in the longitudinal direction is short. As shown in fig. 11, in the intersecting region 150 of modification 3, an extended region Y 'in which the 1 st elastic region Y is extended intersects with an extended region X' in which the 2 nd elastic region X is extended, similarly to the state shown in fig. 7B. Even in the intersecting region 150 where the extended region Y 'and the extended region X' intersect with each other, as in embodiment 1, when the length L1 in the width direction of the intersecting region 150 is shorter than the length L2 in the longitudinal direction (L1< L2) (see the partially enlarged view of fig. 11, and the respective extensions are the same as those in fig. 9 and 10), a tensile force acts on the intersecting region 150 in the longitudinal direction (vertical direction) and a tensile force acts on the central portion of the intersecting region 150 in the width direction, so that the same effects as described above are obtained in the intersecting region 150 in modification 3.

< embodiment 2 >

Fig. 12 is a schematic plan view of the diaper 1 of embodiment 2 in an unfolded and extended state as viewed from the skin side. In embodiment 1, the back sheet of the exterior body 10 is divided into a front side exterior back sheet 120F and a rear side exterior back sheet 120R (fig. 3), but in embodiment 2, the exterior back sheet (not shown) is composed of one sheet continuous in the front waistline region 11F, the crotch region 12, and the rear waistline region 11R, similarly to the exterior top sheet (in embodiment 1, the exterior top sheet 110). Further, the rear leg-surrounding elastic members 140 are not provided, and the rear waistline elastic members 130Rn1 and 130Rn2 are disposed along the width direction at positions further inward in the longitudinal direction than the joint portion 13FR and further outward than the center line CL in the longitudinal direction of the diaper 1. In the front waist region 11F, front waist elastic members 130Fn1 and 130Fn2 are also arranged in the width direction at positions inward in the longitudinal direction of the joint 13FR of the front waist region 11F and outward of the center line CL in the longitudinal direction of the diaper 1. Since the above points are mainly different from those of embodiment 1 and the other points are substantially the same, the following description will be mainly made of the different points, and the same components will be denoted by the same reference numerals and the description thereof will be omitted.

In embodiment 2, the region sandwiched between the front waist elastic member 130Fn1 and the front waist elastic member 130Fn2 in the longitudinal direction in the diaper 1 is the 2 nd elastic region X provided in the front waist region 11F. Further, a region sandwiched by the back waist elastic members 130Rn1 and 130Rn2 in the longitudinal direction in the diaper 1 is the 2 nd elastic region X provided in the back waist region 11R.

In the back waistline region 11R of the 2 nd embodiment, the 1 st elastic region Y (1 st stress region) intersects with the 2 nd elastic region X (2 nd stress region). In the intersecting region 150 where the 1 st stress region and the 2 nd stress region intersect, the length L1 in the width direction of the intersecting region 150 is shorter than the length L2 in the length direction of the intersecting region 150, and the tension in the width direction of the 2 nd elastic region X acts on the central portion of the intersecting region 150 in conjunction with the tension in the length direction by the 1 st elastic region Y.

In the front waistline region 11F of embodiment 2, an extension region Y' (1 st stress region) in which the 1 st elastic region Y extends intersects with the 2 nd elastic region X (3 rd stress region). In the intersecting region 150 ' where the 1 st stress region and the 2 nd stress region intersect, similarly to the intersecting region 150 described above, the length in the width direction of the intersecting region 150 ' is shorter than the length in the longitudinal direction of the intersecting region 150 ', and the tensile force in the width direction of the 2 nd elastic region X acts on the central portion of the intersecting region 150 ' in conjunction with the tensile force in the longitudinal direction by the extended region Y '.

Therefore, even in the state where the fit of the crotch portion by the 1 st stress region is maintained in both the cross region 150 and the cross region 150', the fit of the 2 nd stress region can be maintained, and the movement is easy. Further, since a force toward the outside in the width direction acts on the central portion of the intersecting region 150(150 '), the intersecting region 150 (150') does not collapse, and the appearance (appearance) when worn is improved.

In the intersecting region 150 of embodiment 2, the 1 st elastic region Y intersects with the 2 nd elastic region X, but the same effects as described above are produced regardless of which of the extension regions Y 'or X' or both of the extension regions Y 'and X'.

In addition, in the intersection region 150 ' of embodiment 2, the extension region Y ' intersects with the 2 nd elastic region X in the same manner, but the same effect as described above is produced both in the case where the 1 st elastic region Y intersects with the 2 nd elastic region X and in the case where the 1 st elastic region Y intersects with the extension region X '.

Other embodiments are also possible

The embodiments of the present invention have been described above, but the above embodiments are for easy understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved without departing from the spirit and scope of the present invention, and the present invention naturally encompasses equivalents thereof.

In the above-described embodiment 1, as shown in fig. 2, the 2 nd elastic region X is provided on the longitudinally inner side of the joining portion 13FR of the back waist region 11R and on the longitudinally outer side of the center line CL of the diaper 1, and the 1 st elastic region Y extends from the longitudinally outer end of the 2 nd elastic region X to the longitudinally outer side by a predetermined length S1. When the elastic region formed by the 4 front waistline elastic members 130F is defined as the 3 rd elastic region Z and the 4 front waistline elastic members 130F are arranged along the width direction and are aligned outward in the longitudinal direction from the front waistline elastic member 130F positioned at the innermost side in the longitudinal direction of the front waistline region 11F at the inner end in the longitudinal direction of the front waistline region 11F, the 1 st elastic region Y is arranged at the inner side in the longitudinal direction than the outer end in the longitudinal direction of the 3 rd elastic region Z. However, the present invention is not limited to this, and the 1 st elastic region Y may extend outward in the longitudinal direction than the outer end in the longitudinal direction of the 3 rd elastic region Z. In this case, it is preferable that the 1 st elastic region Y extends from the outer end in the longitudinal direction of the 3 rd elastic region Z to the outside in the longitudinal direction by a length shorter than the predetermined length S1 of the rear waistline region 11R. In the back waistline region 11R, the 1 st elastic region Y intersects with the 2 nd elastic region X, and the 1 st elastic region Y extends outward in the longitudinal direction, so that the pulling force of the 1 st elastic region Y is applied to the 2 nd elastic region X, and the 1 st elastic region Y pulls the crotch region 12 in conjunction with the 2 nd elastic region X, so that the fit to the buttocks is made easier. On the other hand, since the front waistline region 11F has smaller irregularities in body shape than the hip side, by shortening the length of the 1 st elastic region Y in the longitudinal direction, the force of pulling up the 1 st elastic region Y can be reduced without excessive contact, and the urine absorption region at the time of urination can be formed large.

The 3 rd elastic region Z is formed of a plurality of elastic members (130F), but the 3 rd elastic region Z may be a single elastic member, a band-shaped elastic sheet having elasticity, or the like.

Claims

1. An absorbent article having a longitudinal direction, a width direction and a thickness direction intersecting each other in an unfolded state and in an extended state,

the absorbent article includes:

an exterior body having a waistline region and a crotch region; and

an absorbent main body having an absorber provided on a skin side of the outer covering in the thickness direction at least in the crotch region,

the waistline region has a front waistline region located on one end side in the longitudinal direction of the absorbent main body and a rear waistline region located on the other end side in the longitudinal direction of the absorbent main body,

each of the front waistline region and the back waistline region has a joint portion that joins a pair of side ends of the front waistline region and a pair of side ends of the back waistline region,

the absorbent article has a 1 st elastic region, the 1 st elastic region being provided on a non-skin side in the thickness direction with respect to the absorbent body, being disposed along the longitudinal direction of the absorbent body at a central portion in the width direction of the absorbent article,

the absorbent article has a 2 nd elastic region, the 2 nd elastic region being disposed along the width direction at a position inward in the longitudinal direction of at least one of the joint portion of the front waistline region and the joint portion of the back waistline region and outward of a center line in the longitudinal direction of the absorbent article,

when the 1 st elastic region and its extension region are set to a 1 st stress region and the 2 nd elastic region and its extension region are set to a 2 nd stress region, in an intersection region where the 1 st stress region and the 2 nd stress region intersect, a length of the intersection region in the width direction is shorter than a length of the intersection region in the longitudinal direction.

2. The absorbent article according to claim 1,

the 1 st elastic region overlaps at least one of the front waistline region and the back waistline region when viewed in the thickness direction.

3. The absorbent article according to claim 1 or 2,

the 2 nd elastic region is provided over the entire region in the width direction of the absorbent body,

the 2 nd elastic region intersects the 1 st elastic region.

4. The absorbent article according to claim 1,

1 or more flexible shafts are provided along the longitudinal direction of the absorber.

5. The absorbent article according to claim 1,

a pair of flexible shafts is provided along the longitudinal direction of the absorber.

6. The absorbent article according to claim 1,

a central flexible shaft is provided along the longitudinal direction at a central portion in the width direction of the absorbent body,

a pair of side flexible shafts are provided along the longitudinal direction at positions further to the outside in the width direction of the absorbent body than the central flexible shaft.

7. The absorbent article according to claim 1,

at least a portion of the central flexible shaft and at least a portion of the 1 st elastic region overlap when viewed in the thickness direction.

8. The absorbent article according to claim 1,

the second elastic region is provided on the inner side in the longitudinal direction than the joint portion of the back waistline region and on the outer side of the center line in the longitudinal direction of the absorbent article,

an inner end portion in the longitudinal direction of the front waist region has a 3 rd elastic region arranged along the width direction,

the 1 st elastic region extends a predetermined length from an outer end in the longitudinal direction of the 2 nd elastic region to an outer side in the longitudinal direction,

the 1 st elastic region is disposed inward in the longitudinal direction from the outer end in the longitudinal direction of the 3 rd elastic region, or extends outward in the longitudinal direction from the outer end in the longitudinal direction of the 3 rd elastic region by a length shorter than the predetermined length.

9. The absorbent article according to claim 1,

the back waistline region has another elastic region arranged along the width direction at a position outside the 2 nd elastic region in the longitudinal direction,

in the longitudinal direction, the further elastic region and the joint overlap,

one end in the longitudinal direction of the 1 st elastic region is disposed inward in the longitudinal direction from an inner end in the longitudinal direction of the other elastic region.