CN215960639U - Absorbent article - Google Patents

Abstract

The absorbent article (1) comprises an absorbent body (6C), a skin side sheet (7), a non-skin side sheet (5), and an extensible region (23). The absorbent body (6C) includes a first edge, a pair of second edges, and a third edge. The stretch region (23) includes an elastic member bonded to at least one of the skin-side sheet (7) and the non-skin-side sheet (5) in a stretched state. The expansion region (23) has a first expansion region (23A), a second expansion region (23B), and a third expansion region (23C). The first stretch region (23A) is disposed inside a third imaginary line that extends the third edge. The degree of contraction of the second stretch region (23B) is greater than the degree of contraction of the first stretch region (23A). The third stretchable region (23C) has a higher degree of shrinkage than the second stretchable region (23B).

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

An absorbent article that absorbs liquid such as urine and body fluid discharged from a wearer is known (for example, japanese patent laid-open publication No. 2019-97871).

SUMMERY OF THE UTILITY MODEL

The absorbent article is provided with waist gathers for fitting to the waist of the wearer. The waist gather is contracted at the waistline of the wearer, and the absorbent article can be brought into close contact with the waistline.

In the waist of the wearer, the radius of curvature in the vicinity of the ilium is larger than the radius of curvature on the back side, and the absorbent article can be prevented from liquid leakage by being brought into close contact with the vicinity of the ilium on the waist of the wearer. However, in the absorbent article, the absorber end portion is located at a portion of the waist of the wearer corresponding to the vicinity of the ilium, and if the absorbent article is contracted at this portion, the absorber end portion is also contracted, whereby the absorber end portion becomes hard, and the wearing feeling may be deteriorated.

Thus, the present invention provides an absorbent article that can suppress liquid leakage and improve wearing comfort.

In order to solve the above problem, the present invention is provided with a stretchable region disposed on one end portion side in the longitudinal direction of an absorbent article.

The present invention relates to an absorbent article. The absorbent article is provided with a front body region located on the abdomen side of a wearer, a crotch region located in the crotch, and a back body region located on the back side in this order in the longitudinal direction. The absorbent article includes: an absorber disposed from the front body region to the back body region; a skin surface side sheet disposed on a skin surface side of the absorber and formed to be longer than the absorber in the longitudinal direction; a non-skin-side sheet disposed on a non-skin surface side of the absorbent body, and formed longer than the absorbent body in the longitudinal direction and wider than the absorbent body in a width direction orthogonal to the longitudinal direction; and a stretchable region configured to stretch at least one of the skin-side sheet and the non-skin-side sheet in the width direction. The absorbent body includes a first end edge, a pair of second end edges, and a third end edge. The first end sides are disposed on one end side in the longitudinal direction and extend in the width direction, and the pair of second end sides are disposed on both outer sides in the width direction than the first end sides and extend in the longitudinal direction. The third edge connects the first edge and the second edge at a position closer to a center of the absorbent body than a first imaginary line extending the first edge and a second imaginary line extending the second edge. The stretchable region includes an elastic member that is bonded to at least one of the skin-side sheet and the non-skin-side sheet in a stretched state, and the elastic member is disposed on the one end side in the longitudinal direction and extends in the width direction. The telescopic area is provided with a first telescopic area, a second telescopic area and a third telescopic area. The first stretchable region is disposed inside a third imaginary line extending the third edge. The second stretchable region is disposed between the third virtual line and the second virtual line, and has a higher degree of shrinkage than the first stretchable region. The third stretchable region is disposed outside the second virtual line in the width direction, and has a higher degree of shrinkage than the second stretchable region.

In the absorbent article, the first stretchable region, the second stretchable region, and the third stretchable region may be disposed on the end portion side in the longitudinal direction with respect to the first end side.

The absorbent article may further include a first stretchable portion that stretches at least the non-skin-side sheet in the width direction. The first stretch portion may include a first elastic member adhered to the non-skin-side sheet in a stretched state. The first elastic member may be disposed at an end portion side in the width direction of the third end side and may extend in the width direction.

In the absorbent article, the first elastic member may extend to the vicinity of the third end edge.

In the absorbent article, a degree of contraction of the first stretchable part may be greater than a degree of contraction of the second stretchable region.

The absorbent article may further include: a pair of side wing portions disposed in the back region and extending outward in the width direction from the absorber; and a belt attached to each of the pair of side wing portions for fixing the absorbent article to the waist of the wearer in a state of being attached to the front body region. The one end side in the longitudinal direction may be the posterior region side.

The absorbent article may further include a second stretchable portion that stretches at least the skin-side sheet in the width direction. The second stretch portion may include a second elastic member adhered to the skin side sheet in a stretched state. The second elastic member may be disposed on the back body region side with respect to the first end side and may extend in the width direction.

According to the present invention, it is possible to suppress liquid leakage and improve wearing comfort.

Drawings

The features, advantages and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals represent like elements, and wherein:

fig. 1 is a perspective view of a diaper of embodiment 1.

Fig. 2 is an exploded perspective view of the diaper of embodiment 1.

Fig. 3 is a cross-sectional view of the diaper in the non-worn state of embodiment 1 cut along the width direction at the center in the longitudinal direction.

Fig. 4 is a plan view of the extended diaper of embodiment 1 as viewed from the skin surface side.

Fig. 5 is an enlarged view of the back region side of the absorbent body of the diaper of embodiment 1.

Fig. 6 is a plan view of the extended diaper of embodiment 2 as viewed from the skin surface side.

Fig. 7 is an enlarged view of the back region of the diaper in the extended state of embodiment 2.

Detailed Description

Hereinafter, an absorbent article according to an embodiment of the present invention will be described with reference to the drawings. The configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

< embodiment 1>

In the present embodiment, a tape-type disposable diaper (which is an example of an "absorbent article" referred to in the present application and will be hereinafter simply referred to as "diaper") has a longitudinal direction defined as a direction connecting a front body disposed to face an abdomen of a wearer and a back body disposed to face a back of the wearer. The crotch portion disposed in the crotch (disposed opposite to the crotch) of the wearer is located between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction). In a state where the diaper is worn on a wearer (hereinafter simply referred to as a "worn state"), one side facing the skin of the wearer (the inner side in the worn state) is referred to as a skin surface side, and the opposite side to the skin surface side (the outer side in the worn state) is referred to as a non-skin surface side. The direction connecting the skin surface side and the non-skin surface side is defined as the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is defined as the width direction. In addition, the observation from the thickness direction is referred to as planar observation.

Fig. 1 is a perspective view of a diaper of the present embodiment. The diaper 1 has a crotch region 1B which is a part corresponding to the crotch of a wearer and covers the pudendum of the wearer in a worn state, a front body region 1F which is a part corresponding to the front body of the wearer and located on the front side of the crotch region 1B, and a rear body region 1R which is a part corresponding to the rear body of the wearer and located on the rear side of the crotch region 1B. Tapes 2L, 2R that can be attached to the front patch 2F provided on the non-wearer side surface of the front body region 1F are provided on the left and right edges of the back body region 1R. When the tapes 2L and 2R are attached to the front patch 2F in a state where the front body region 1F is disposed on the abdominal side of the wearer and the rear body region 1R is disposed on the back side of the wearer, the diaper 1 is fixed to the body of the wearer in a state of surrounding the abdominal circumference and the thighs of the wearer. Since the diaper 1 is fixed to the body of the wearer in this manner, the wearer can walk while standing with the diaper 1.

In the diaper 1, an absorbent body capable of absorbing and retaining liquid is disposed mainly in the vicinity of the crotch region 1B. In the diaper 1, in order to suppress formation of a gap which becomes an outflow path of liquid between the diaper 1 and the skin of the wearer, leg gathers 3AL, 3AR are provided at a portion surrounding the leg portions (thigh portions) of the wearer, three-dimensional gathers 3BL, 3BR are provided at the inner side in the width direction of the diaper 1 than the leg gathers 3AL, 3AR, and a waist gather 3R is provided at a portion surrounding the abdominal circumference of the wearer. The leg gathers 3AL and 3AR, the three-dimensional gathers 3BL and 3BR, and the waist gather 3R are brought into close contact with the skin of the wearer by the elastic force of the elastic member. Thus, the liquid discharged from the pudendal region of the wearer is absorbed by the absorbent body of the diaper 1 without leaking from the diaper 1. Further, as the elastic member, linear or belt-like rubber can be appropriately selected.

Fig. 2 is an exploded perspective view of the diaper 1. Fig. 3 is a cross-sectional view of the diaper 1 in a non-worn state, taken along the width direction at the center in the longitudinal direction. Fig. 4 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. In fig. 4, a single-dot chain line, i.e., line C1, is a center line indicating the center in the width direction of the diaper 1. In fig. 4, the elastic members 4C, 4SR, 4SL, 8EL, and 8ER are not illustrated. The diaper 1 has a cover sheet 4 which forms an outer surface in a worn state. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance and provided with narrowed portions 4KL and 4KR at positions corresponding to the long sides, and forms the exterior surface of the diaper 1. The narrowed portions 4KL and 4KR are provided at the portions where the wearer's thighs are located (leg-surrounding regions 10L and 10R shown in fig. 4). The cover sheet 4 is provided for reinforcement of the back sheet 5 described later and improvement of texture, and for example, a nonwoven fabric made of a liquid impermeable thermoplastic resin can be used as a material thereof in order to suppress leakage of excrement. Examples of the liquid impermeable thermoplastic resin include Polyethylene (PE), polypropylene (PP), and the like. The cover sheet 4 is not limited to a single-layer structure, and may be a multi-layer structure having an inner cover sheet and an outer cover sheet.

The diaper 1 further includes a back sheet 5 (an example of a "non-skin-side sheet" in the present application), an absorbent body 6C, and a top sheet 7 (an example of a "skin-side sheet" in the present application) laminated in this order on the wearer-side surface of the cover sheet 4. The back sheet 5, the absorbent body 6C, and the top sheet 7 are sheet-like members having a substantially rectangular appearance, and are sequentially stacked on the cover sheet 4 in a state where the longitudinal direction coincides with the longitudinal direction of the cover sheet 4. The back sheet 5 is a sheet made of a liquid impermeable thermoplastic resin for suppressing leakage of excrement, similarly to the cover sheet 4. The back sheet 5 is preferably made of a material having moisture permeability in order to suppress the damp feeling in the worn state. The top sheet 7 is a sheet-like member disposed on the skin surface side of the wearer so as to cover the water absorption surface of the absorbent body 6C. The topsheet 7 has liquid permeability in a part or all thereof. Therefore, in the state where the diaper 1 is worn, the liquid excreted from the wearer passes through the top sheet 7 contactable with the skin of the wearer, enters the absorber 6C, and is absorbed therein. For example, woven cloth, nonwoven cloth, and porous film can be used as the material of the top sheet 7. The topsheet 7 may also have hydrophilic properties.

The backsheet 5, the absorbent body 6C, and the topsheet 7 extend from the front body region 1F to the back body region 1R. Thus, when the private parts of the wearer are covered with the cover sheet 4 in which the back sheet 5, the absorbent body 6C, and the top sheet 7 are laminated, both longitudinal ends of the back sheet 5, the absorbent body 6C, and the top sheet 7 are positioned on the ventral side and the dorsal side of the wearer. That is, the wearer's pudendal region is covered with the absorbent body 6C from the abdomen side to the back side of the wearer. Therefore, regardless of which posture the wearer discharges the liquid to the outside of the body, the wearer has the abdomen facing downward or the back facing downward, the discharged liquid contacts the absorbent body 6C via the top sheet 7.

In the diaper 1, the elastic members 4SL and 4SR for forming the above-described leg gathers 3AL and 3AR are provided between the cover sheet 4 and the back sheet 5 so as to stretch and contract in the longitudinal direction of the diaper 1. The elastic members 4SL and 4SR are provided in an appropriate number (3 in the present embodiment) determined in accordance with the elastic force (contractive force) required for the design of the diaper 1. As shown in fig. 4, the leg gathers 3AL and 3AR are disposed around the leg regions 10L and 10R, which are portions of the diaper 1 including the thighs of the wearer. The leg-encircling regions 10L and 10R are disposed at both widthwise end portions of the crotch region 1B. The regions where the elastic members 4SL, 4SR are arranged are the leg gathers 3AL, 3 AR.

The diaper 1 further includes elongated belt- like side panels 8L and 8R. The side sheets 8L and 8R are liquid-impermeable sheets provided on the long side portions of the top sheet 7. In the side sheets 8L and 8R, similarly to the cover sheet 4, narrowed portions 8KL and 8KR are provided at portions where the wearer's thighs are located (leg-surrounding regions 10L and 10R shown in fig. 4). In the side sheets 8L and 8R, elastic members 8EL and 8ER for forming the three-dimensional gathers 3BL and 3BR are arranged along the longitudinal direction. When the diaper 1 is in a state of being worn, that is, when the diaper 1 is in a U-shape in side view, the side sheets 8L and 8R are pulled up in the longitudinal direction by the contraction force of the elastic members 8EL and 8ER and rise from the top sheet 7, and become the three-dimensional gathers 3BL and 3BR which prevent the liquid from flowing out.

In addition, in the cover sheet 4, the elastic member 4C that prevents a gap from being formed between the diaper 1 and the abdominal circumference of the wearer is provided along the longitudinal direction of the diaper 1 on the inner side in the width direction of the diaper 1 than the elastic members 4SL, 4 SR. The elastic member 4C is provided in accordance with an elastic force (contractive force) or the like required in design in the diaper 1.

The diaper 1 further includes elastic members 9L, 9R, and 12 for forming the waist gather 3R. The elastic members 9R, 9L, 12 are provided between the backsheet 5 and the top sheet 7 at positions on the back side of the end of the absorbent body 6C. The elastic members 9L, 9R, and 12 extend between the back sheet 5 and the top sheet 7 so that the stretching direction is the width direction of the diaper 1. Thus, when the tapes 2L, 2R provided on both the left and right sides of the elastic members 9R, 9L, 12 are attached to the front patch 2F on the abdominal side of the wearer, the elastic members 9R, 9L, 12 exert contraction forces to bring the diaper 1 into close contact with the wearer, thereby preventing a gap from being formed between the diaper 1 and the abdominal circumference of the wearer.

The absorber 6C has the following structure: particulate Absorbent resins such as SAP (Super Absorbent Polymer) which is a hydrophilic Polymer having a crosslinked structure and is capable of absorbing and retaining water are retained in gaps between short fibers of cellulose fibers such as pulp fibers, rayon fibers and cotton fibers, or short fibers obtained by hydrophilization treatment of synthetic fibers such as polyethylene, polypropylene and polyethylene terephthalate. Thus, in the absorbent body 6C, the volume change of the absorbent resin before and after the absorption of the liquid is basically performed in the short fibers holding the absorbent resin in the gaps. Therefore, if the entire absorbent body 6C is viewed in overhead, the expansion rate of the thickness of the absorbent body 6C that has absorbed liquid is not as large as the expansion rate of the absorbent resin itself.

The SAP particles of the present embodiment are obtained by granulating a resin composition containing an SAP. The "resin composition containing an SAP" referred to herein is a concept including both a composition composed of only an SAP and a composition containing an SAP as a main component and other substances therein to such an extent that the water absorption is not adversely affected. Examples of the "other substances" include additives (such as a surface modifier added for the purpose of hydrophobizing the particle surface), unreacted monomers remaining during synthesis of the SAP, and the like.

As shown in fig. 4, the diaper 1 includes a pair of side- flap portions 11L and 11R disposed in the back region 1R and extending outward in the width direction of the diaper 1 from the absorbent body 6C. In the present embodiment, the flap portions 11L, 11R are configured to include the cover sheet 4 forming the outer cover of the diaper 1, and the side sheets 8L, 8R joined to the skin surface side of the cover sheet 4 to form the three-dimensional gathers 3BL, 3 BR. The diaper 1 further includes belts 2L, 2R connected to each of the pair of side wing portions 11L, 11R for fixing the diaper 1 to the waist of the wearer in a state of being attached to the front patch 2F disposed in the front body region 1F.

As shown in fig. 4, the absorber 6C is disposed from the front body region 1F to the back body region 1R. The top sheet 7 disposed on the skin surface side of the absorbent body 6C is formed longer than the absorbent body 6C in the longitudinal direction of the diaper 1. The backsheet 5 disposed on the non-skin surface side of the absorbent body 6C is formed longer than the absorbent body 6C in the longitudinal direction of the diaper 1 and wider than the absorbent body 6C in the width direction of the diaper 1. The longitudinal ends of the top sheet 7 and the back sheet 5 are aligned with the longitudinal ends of the diaper 1. Further, the top sheet 7 is formed to be wider than the absorbent body 6C in the width direction of the diaper 1, but the top sheet 7 may be formed to have the same width as the absorbent body 6C and may be disposed so that the width direction end portions thereof coincide with the width direction end portions of the absorbent body 6C. In this case, the end portions of the top sheet 7 in the width direction may be joined to the side sheets 8L and 8R.

Here, the end portion of the absorbent body 6C on the back body region 1R side will be described in detail with reference to fig. 5. Fig. 5 is an enlarged view of the back region 1R side of the absorbent body 6C as viewed from the skin surface side. The absorber 6C has a first end edge 6CE disposed on the back region 1R side (an example of "one end side" in the present application) in the longitudinal direction of the diaper 1 and extending in the width direction of the diaper 1. The first end edge 6CE is an end edge on the back region 1R side of the absorbent body 6C. The absorber 6C has a pair of second end edges 6CL and 6CR disposed on both outer sides in the width direction of the diaper 1 than the first end edge 6CE and extending in the longitudinal direction of the diaper 1. The second end edges 6CL and 6CR define the widthwise ends of the absorbent body 6C on the back region 1R side. The absorber 6C has a gourd-shaped shape in plan view in which the longitudinal direction center portion is recessed toward the width direction center side, and the second end edges 6CL and 6CR are formed substantially linearly at the outer sides in the width direction than the recessed portions. The absorbent body 6C may have a rectangular shape with the second end edges 6CL and 6CR constituting the long sides. The absorber 6C has third end sides 6CNL and 6CNR connecting the first end side 6CE and the second end sides 6CL and 6CR closer to the center of the absorber 6C than a first virtual line 6VE extending the first end side 6CE and second virtual lines 6VL and 6VR extending the second end sides 6CL and 6 CR. The outline of the absorber 6C on the back region 1R side is defined by the first end edge 6CE, the second end edges 6CL and 6CR, and the third end edges 6CNL and 6 CNR. In the present embodiment, the third end sides 6CNL and 6CNR are formed linearly, but may be formed in a curved shape.

Next, returning to fig. 4, the rear body region 1R side of the diaper 1 will be described in more detail. The diaper 1 includes first stretchable components 20L, 20R including first elastic members 9L, 9R disposed on the end portions of the diaper 1 in the width direction of the third end edges 6CNL, 6CNR and extending in the width direction. The first elastic members 9L and 9R are disposed between the backsheet 5 and the top sheet 7 and the side sheets 8L and 8R, and are bonded to the backsheet 5 at least in an expanded state. Thereby, the first stretchable parts 20L, 20R can stretch at least the backsheet 5 in the width direction of the diaper 1. In the present embodiment, since the top sheet 7 and the side sheets 8L and 8R are joined to the back sheet 5, the top sheet 7 and the side sheets 8L and 8R are also stretched and contracted by the first stretching parts 20L and 20R together with the back sheet 5. In the present embodiment, band-shaped members (sheet-shaped members) are used as the first elastic members 9L and 9R, and the first elastic members 9L and 9R extend to the vicinity of the third end sides 6CNL and 6 CLR. Further, a plurality of linear rubbers may be used for the first elastic members 9L, 9R.

In the diaper 1 of the present embodiment, the waist gather 3R is configured to include the first stretch units 20L, 20R. The first expansion/ contraction parts 20L, 20R are disposed at positions corresponding to the vicinity of the ilium where the radius of curvature is large in the waistline of the wearer. Therefore, the diaper 1 of the present embodiment can be brought into close contact with the vicinity of the ilium of the waist of the wearer by the first stretchable parts 20L, 20R, thereby preventing a gap from being formed between the diaper 1 and the abdominal circumference of the wearer and preventing liquid leakage. The first stretchable parts 20L, 20R are formed to include first elastic members 9L, 9R disposed on the end parts sides in the width direction of the diaper 1 at the third end sides 6CNL, 6CNR of the absorber 6C. The third end sides 6CNL, 6CNR are located closer to the center side of the absorbent body 6C without being affected by the expansion and contraction of the first expansion and contraction parts 20L, 20R. Thus, in the diaper 1 of the present embodiment, the end portions of the absorbent body 6C can be arranged without being affected by the expansion and contraction of the first expansion and contraction sections 20L, 20R, and therefore, the contraction of the end portions of the absorbent body 6C can be prevented, and the end portions of the absorbent body 6C can be prevented from becoming hard due to contraction, and the wearing comfort can be improved. In this way, the diaper 1 of the present embodiment can suppress liquid leakage and improve wearing comfort.

The diaper 1 of the present embodiment further includes a second stretchable part 21 including a second elastic member 12 disposed on the back region 1R side of the first end edge 6CE of the absorbent body 6C and extending in the width direction of the diaper 1. The second elastic member 12 is disposed between the backsheet 5 and the topsheet 7, and is bonded to the backsheet 5 at least in an expanded state. Thereby, the second stretchable part 21 can stretch the backsheet 5 in the width direction of the diaper 1. In the present embodiment, since the top sheet 7 is joined to the back sheet 5, the top sheet 7 is also stretched and contracted by the second stretch units 21 together with the back sheet 5. In the present embodiment, a sheet-shaped member (belt-shaped member) is used as the second elastic member 12. Further, a plurality of (e.g., 2) linear rubbers may be used for the second elastic member 12.

In the diaper 1 of the present embodiment, the waist gather 3R is configured to include the second stretch unit 21. The second stretchable part 21 is disposed at a portion corresponding to the back side of the wearer's waistline. Therefore, the diaper 1 of the present embodiment can be brought into close contact with the back side of the waist of the wearer by the second stretchable part 21, thereby preventing a gap from being formed between the diaper 1 and the abdominal circumference of the wearer and suppressing liquid leakage.

In the diaper 1 of the present embodiment, the stretchability of the first stretchable components 20L, 20R is greater than the stretchability of the second stretchable component 21. The stretching force can be adjusted by the thickness, stretching magnification, and number of the first elastic members 9L and 9R and the second elastic member 12. In the present embodiment, the same sheet-like members are used for the first elastic members 9L and 9R and the second elastic member 12. When linear rubbers are used for the first elastic members 9L and 9R and the second elastic member 12, the stretching force can be adjusted by the number of the linear rubbers.

In the diaper 1 of the present embodiment, the length of the first stretchable part 20L, 20R in the longitudinal direction of the diaper 1 is longer than the length of the second stretchable part 21 in the longitudinal direction of the diaper 1. Here, the length of each stretchable and contractible portion in the longitudinal direction of the diaper 1 is the length of the region in which each elastic member is disposed in the longitudinal direction. When the same linear rubbers are used for the first elastic members 9L, 9R and the second elastic member 12, the linear rubbers are arranged in parallel with each other with a predetermined interval therebetween, and therefore the number of linear rubbers of the first stretchable parts 20L, 20R is larger than the number of linear rubbers of the second stretchable part 21.

The second stretchable part 21 is disposed at a predetermined interval from the first end edge 6CE of the absorbent body 6C. This can prevent the absorbent body 6C from being stretched in the width direction of the diaper 1 due to the effect of the stretching of the second stretchable part 21 on the absorbent body 6C.

< embodiment 2>

Next, the diaper 1 of embodiment 2 will be explained. Note that the same components as those of the diaper 1 of the above embodiment are denoted by the same reference numerals, and description thereof is omitted. Fig. 6 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 7 is an enlarged view of the back region 1R side of fig. 6. In fig. 6 and 7, the elastic members 4C, 4SR, 4SL, 8EL, and 8ER are not shown.

The diaper 1 of the present embodiment includes the stretchable region 23 including the elastic member 22 disposed on the back region 1R side and extending in the width direction of the diaper 1. The elastic member 22 is disposed between the back sheet 5 and the top sheet 7, and is bonded to the back sheet 5 at least in an expanded state. Thereby, the stretchable region 23 enables the backsheet 5 to stretch in the width direction of the diaper 1. In the present embodiment, since the top sheet 7 is joined to the back sheet 5, the top sheet 7 is also included in the stretchable region 23 together with the back sheet 5. Further, the elastic member 22 may be joined to at least one of the back sheet 5 and the top sheet 7. In the present embodiment, a plurality of (e.g., 2) linear rubbers are used for the elastic member 22. Further, a sheet-like member (belt-like member) may be used for the elastic member 22.

As shown in fig. 7, the stretchable region 23 includes a first stretchable region 23A disposed inside third imaginary lines 6CL and 6CR obtained by extending the third end sides 6CNL and 6CNR, a second stretchable region 23B disposed between the third imaginary lines 6CL and 6CR and the second imaginary lines 6VL and 6VR, and a third stretchable region 23C disposed outside the second imaginary lines VL and VR in the width direction. In the present embodiment, the elastic members 22 of the stretchable region 23 extend in the width direction of the diaper 1 over the first stretchable region 23A, the second stretchable region 23B and the third stretchable region 23C. The stretchable zone 23 may include, instead of the elastic member 22 extending over the first stretchable zone 23A, the second stretchable zone 23B, and the third stretchable zone 23C, an elastic member extending in each of the first stretchable zone 23A, the second stretchable zone 23B, and the third stretchable zone 23C.

The first stretchable region 23A is disposed between the third virtual lines 6CL and 6CR, and is substantially not contracted as compared with the second stretchable region 23B and the third stretchable region 23C because it is affected by the absorbent body 6C having higher rigidity than the top sheet 7 and the back sheet 5 during stretching. The degree of contraction of the first stretch region 23A is about 90%, and the degree of contraction of the first stretch region 23A is smaller than the degree of contraction of the second stretch region 23B. The degree of contraction of each expansion and contraction region is a value expressed as a percentage by dividing the length of each expansion and contraction region in the natural state (contracted state) by the length in the expanded state and multiplying the result by 100.

The second stretch region 23B has a higher degree of shrinkage than the first stretch region 23A, and the degree of shrinkage is about 70%. The second stretch region 23B is adjacent to the first stretch region 23A in the width direction of the diaper, and therefore, contracts in a state of being closer to the widthwise center side of the diaper 1. Since the absorbent body 6 is not disposed in the stretchable region 23, the stretchable region 23 is composed of the top sheet 7, the back sheet 5, and the elastic member 22, and their rigidity is lower than that of the absorbent body 6C, so that a concave portion is formed on the inner side of the stretchable region 23 in the longitudinal direction of the diaper 1. The distance between the first stretchable zone 23A (the elastic member on the crotch region 1B side of the first stretchable zone 23A) and the first edge 6CE of the absorbent body 6C is at least 10mm, and preferably about 15mm to 20 mm.

Thus, the second stretchable region 23B has a certain degree of stretchability, and therefore has a shape that rises toward the skin surface side with respect to the absorbent body 6C, and a concave portion is formed on the inner side of the stretchable region 23 in the longitudinal direction of the diaper 1. Here, since the first stretchable zone 23A and the second stretchable zone 23B are both provided at a sufficient distance (10mm or more) from the absorbent body 6C and the degree of contraction of each stretchable zone is only about 20, the absorbent body 6C is not bent by the contraction of the first stretchable zone 23A and the second stretchable zone 23B.

The third stretchable zone 23C has a high degree of contraction, for example, about 60%, because it is outside the end in the width direction of the absorbent body when the diaper 1 is viewed in the width direction. The third stretch region 23C is in close contact with the skin surface of the wearer from the back to the side abdomen so that no gap is formed between the diaper 1 and the skin surface in the worn state of the diaper 1. Thus, the third stretchable zone 23C serves as a starting point from which a wall portion of a recess formed inside the first stretchable zone 23A and the second stretchable zone 23B rises toward the non-skin surface side.

In the diaper 1 of the present embodiment, the first stretchable components 20L and 20R are disposed on the inner side in the longitudinal direction of the diaper 1 than the third stretchable zone 23C. In the present embodiment, a plurality of (for example, 6) linear rubbers are used for the first elastic members 9L and 9R of the first expansion and contraction parts 20L and 20R. The first stretch units 20L, 20R extend from the inner side of the third stretch region 23C to the inner end of the third end edges 6CNL, 6CNR when the diaper 1 is viewed in the longitudinal direction. The contraction degree of the first stretchable components 20L, 20R is greater than the contraction degree of the second stretchable zone 23B, and the first stretchable components 20L, 20R contract to surround the recess formed on the longitudinal direction inner side of the diaper 1 in the stretchable zone 23 from the width direction outer side with the first stretchable components 20L, 20R. The diaper 1 of the present embodiment can contain moisture, watery feces, and the like that have seeped into the concave portion from the end of the absorber 6C or have flowed over the top sheet 7, and can suppress leakage of these to the outside. Thus, the diaper 1 of the present embodiment can suppress liquid leakage and improve wearing comfort.

< other embodiment >

Next, other embodiments will be described. The diaper 1 of the above embodiment is fixed to the waist of the wearer in a state where the side wing portions 11L, 11R are disposed in the back region 1R and the tapes 2L, 2R connected to the side wing portions 11L, 11R are attached to the front region 1F, but the diaper 1 is not limited to this. For example, the diaper 1 may be fixed to the waist of the wearer in a state where the side flap portions 11L, 11R are disposed in the back region 1R and the tapes 2L, 2R connected to the side flap portions 11L, 11R are attached to the back region 1R. In this configuration, the first edge 6CE, the second edges 6CL and 6CR, the third edges 6CNL and 6CNR, the first stretchable components 20L and 20R, the second stretchable component 21, and the stretchable region 23 of the absorbent body 6C are disposed on the front region 1F side of the diaper 1.

Claims (10)

1. An absorbent article (1) in which a front body region (1F) located on the abdomen side of a wearer, a crotch region (1B) located in the crotch, and a back body region (1R) located on the back side are sequentially provided in the longitudinal direction, the absorbent article (1) being characterized by comprising:

an absorber (6C) disposed from the front body region (1F) to the rear body region (1R);

a skin surface side sheet (7) which is arranged on the skin surface side of the absorber (6C) and is formed to be longer than the absorber (6C) in the longitudinal direction;

a non-skin-surface side sheet (5) which is arranged on the non-skin surface side of the absorbent body (6C), is longer than the absorbent body (6C) in the longitudinal direction, and is wider than the absorbent body (6C) in the width direction orthogonal to the longitudinal direction; and

a stretchable region (23) that stretches at least one of the skin-side sheet (7) and the non-skin-side sheet (5) in the width direction,

the absorbent body (6C) includes a first end side disposed on one end side in the longitudinal direction and extending in the width direction, a pair of second end sides disposed on both outer sides in the width direction than the first end side and extending in the longitudinal direction, and a third end side connecting the first end side and the second end side on a center side of the absorbent body (6C) than a first imaginary line obtained by extending the first end side and a second imaginary line obtained by extending the second end side,

the stretchable region (23) includes an elastic member that is bonded to at least one of the skin-side sheet (7) and the non-skin-side sheet (5) in a stretched state, is disposed on the one end side in the longitudinal direction, and extends in the width direction,

the telescopic region (23) has a first telescopic region (23A), a second telescopic region (23B) and a third telescopic region (23C),

the first stretchable region (23A) is disposed on the inner side of a third imaginary line obtained by extending the third edge,

the second stretchable region (23B) is disposed between the third virtual line and the second virtual line and has a higher degree of shrinkage than the first stretchable region (23A),

the third stretchable region (23C) is disposed outside the second virtual line in the width direction, and has a higher degree of shrinkage than the second stretchable region (23B).

2. Absorbent article (1) according to claim 1,

the first stretchable region (23A), the second stretchable region (23B), and the third stretchable region (23C) are disposed at the end portion side in the longitudinal direction with respect to the first end side.

3. Absorbent article (1) according to claim 1,

further comprising first stretchable parts (20L, 20R) for stretching at least the non-skin-side sheet (5) in the width direction,

the first stretchable sections (20L, 20R) include first elastic members (9L, 9R) that are bonded to the non-skin-side sheet (5) in a stretched state, and the first elastic members (9L, 9R) are disposed on the end portions of the third edge in the width direction and extend in the width direction.

4. Absorbent article (1) according to claim 2,

further comprising first stretchable parts (20L, 20R) for stretching at least the non-skin-side sheet (5) in the width direction,

the first stretchable sections (20L, 20R) include first elastic members (9L, 9R) that are bonded to the non-skin-side sheet (5) in a stretched state, and the first elastic members (9L, 9R) are disposed on the end portions of the third edge in the width direction and extend in the width direction.

5. Absorbent article (1) according to claim 3,

the first elastic member (9L, 9R) extends to the vicinity of the third end edge.

6. Absorbent article (1) according to claim 4,

the first elastic member (9L, 9R) extends to the vicinity of the third end edge.

7. Absorbent article (1) according to any one of claims 3-6,

the degree of contraction of the first stretchable part (20L, 20R) is greater than the degree of contraction of the second stretchable region (23B).

8. The absorbent article (1) according to any one of claims 1 to 6, further comprising:

a pair of side wing sections (11L, 11R) that are disposed in the back region (1R) and that extend outward in the width direction from the absorbent body (6C); and

bands (2L, 2R) connected to each of the pair of side wing sections (11L, 11R) for fixing the absorbent article (1) to the waist of the wearer in a state of being attached to the front body region (1F),

the one end portion side in the longitudinal direction is the posterior region side.

9. The absorbent article (1) according to claim 7, further comprising:

a pair of side wing sections (11L, 11R) that are disposed in the back region (1R) and that extend outward in the width direction from the absorbent body (6C); and

bands (2L, 2R) connected to each of the pair of side wing sections (11L, 11R) for fixing the absorbent article (1) to the waist of the wearer in a state of being attached to the front body region (1F),

the one end portion side in the longitudinal direction is the posterior region side.

10. Absorbent article (1) according to claim 1 or 2,

further comprises a second expansion part (21) which expands and contracts at least the skin surface side sheet (7) in the width direction,

the second stretchable part (21) includes a second elastic member (12) that is bonded to the skin surface side sheet (7) in a stretched state, and the second elastic member (12) is disposed closer to the back body region side than the first end edge and extends in the width direction.

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