JP7037630B1 - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article having a good appearance and a high fit. SOLUTION: An absorbent article 1 has a longitudinal direction X, a width direction Y orthogonal to the longitudinal direction X, a ventral region F, an inseam region M and a dorsal region R, and an absorbent main body 2 arranged in these regions. And an exterior body 3 arranged on the non-skin facing surface side of the absorbent body 2. The exterior body 3 includes an inner layer sheet 31, a middle layer sheet 32, and an outer layer sheet 33 which is an elastic sheet in this order from the skin facing surface side to the non-skin facing surface side, and the inner layer sheet 31 and the inner layer sheet 31 extending in the width direction Y. It has a plurality of first elastic members 8 arranged between the middle layer sheets 32. In the exterior body 3, the outer layer sheet 33 and the middle layer sheet 32 are partially joined by the first joint portion 40 in a state where the outer layer sheet 33 can be extended, and the middle layer sheet 32 and the inner layer sheet 31 are secondly joined. At least partially joined by 50. [Selection diagram] FIG. 4

Description

The present invention relates to an absorbent article.

Absorbent articles such as disposable diapers generally include an absorbent body and an exterior body disposed on the non-skin facing side of the absorbent body, with both edges of the exterior body on the ventral side. Both sides of the exterior on the dorsal side are joined to form a waist opening and a pair of leg openings.

As an absorbent article having such a structure, the applicant has applied that the pitch of the folds on the surface of the inner layer sheet is the folds on the surface of the outer layer sheet on the surface of the exterior body having the outer layer sheet and the inner layer sheet in a relaxed state. We have proposed an absorbent article in which a plurality of folds are formed so as to be smaller than the pitch of (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2010-284229

The absorbent article described in Patent Document 1 has a good appearance of the absorbent article by forming folds, but the appearance is configured so as not to form unevenness of the folds on the outer surface of the absorbent article. There was room for improvement in terms of improvement.

Therefore, the present invention is to provide an absorbent article having a good appearance and a high fit.

The present invention has a longitudinal direction corresponding to the anterior-posterior direction of the wearer and a width direction orthogonal to the longitudinal direction, and is between the ventral region and the dorsal region and the ventral region and the dorsal region. An exterior with an inseam region located, an absorbent body arranged in a region from the ventral region to the dorsal region along the longitudinal direction, and an exterior arranged on the non-skin facing surface side of the absorbent body. An absorbent article with a body
The exterior body is between an inner layer sheet arranged on the skin facing surface side, an outer layer sheet arranged on the non-skin facing surface side and constituting the outer surface of the absorbent article, and the inner layer sheet and the outer layer sheet. It has an arranged middle layer sheet and a plurality of first elastic members between the inner layer sheet and the middle layer sheet so as to extend in the width direction.
The outer layer sheet is an elastic sheet and is
In the exterior body, the outer layer sheet and the middle layer sheet are partially joined by the first joint portion in a state in which the outer layer sheet is expandable, and the middle layer sheet and the inner layer sheet are secondly joined to each other. It provides an absorbent article that is formed, at least partially joined by.

INDUSTRIAL APPLICABILITY According to the present invention, an absorbent article having a good appearance and a high fit is provided.

FIG. 1 is a perspective view schematically showing an embodiment of a disposable diaper in a relaxed state, which is an embodiment of an absorbent article. FIG. 2 is a development plan view schematically showing the skin facing surface side (inner surface side) in the extended and expanded state of the diaper shown in FIG. FIG. 3 is a perspective view schematically showing a laminated state of the inner layer sheet, the middle layer sheet and the outer layer sheet in the maximum extended state of the exterior body. FIG. 4 is an enlarged perspective view of a main part schematically showing an embodiment of the laminated state of the inner layer sheet, the middle layer sheet and the outer layer sheet in the relaxed state in the exterior body shown in FIG. FIG. 5 is an enlarged perspective view of a main part schematically showing another embodiment of the laminated state of the inner layer sheet, the middle layer sheet and the outer layer sheet in the relaxed state in the exterior body shown in FIG. FIG. 6A is a schematic plan view of an embodiment of the arrangement of the first joint portion and the second joint portion in a plan view of the exterior body in the maximum extension state, and FIG. 6B is a maximum extension. It is a plan view of another embodiment of the arrangement of the 1st joint part and the 2nd joint part in the plan view of the exterior body in a state. FIG. 7 is a cross-sectional view schematically showing a cross section along the longitudinal direction of the exterior body in the maximum extended state. FIG. 8 is a cross-sectional view schematically showing a cross section along the width direction of the exterior body in the maximum extended state.

Hereinafter, the absorbent article of the present invention will be described based on its preferred embodiment. 1 and 2 show an embodiment of a pants-type disposable diaper as a preferred embodiment of the absorbent article of the present invention.

As shown in FIGS. 1 and 2, the pants-type disposable diaper 1 as an absorbent article (hereinafter, also simply referred to as “diaper 1”) is a ventral region F arranged on the ventral side of the wearer when the diaper is worn. And a dorsal region R arranged on the dorsal side, and an inseam region M located between the ventral region F and the dorsal region R. The diaper 1 has a longitudinal direction X extending from the ventral side of the wearer to the dorsal side via the crotch portion and a width direction Y orthogonal to the longitudinal direction X corresponding to the front-back direction of the wearer. The ventral region F, the inseam region M, and the dorsal region R extend continuously along the anterior-posterior direction of the wearer. The inseam region M has an excretion portion facing portion (not shown) that is arranged to face the excretion portion of the wearer when the diaper 1 is worn.

In the present specification, the "skin facing surface" is a surface facing the wearer's skin when wearing the diaper when focusing on the diaper or its constituent members (for example, an absorbent body), and is a "non-skin facing surface". Is the surface facing the wearer's skin when wearing the diaper. That is, the skin-facing surface is the surface relatively close to the wearer's skin, and the non-skin-facing surface is the surface relatively far from the wearer's skin. "When worn" refers to the state in which the proper wearing position of the diaper is maintained. The "maximum stretched state" is a state in which the target member is stretched until each elastic member, which will be described later, is stretched to reach the design dimension (dimension when the elastic member is unfolded in a plane with no influence of the elastic member). be.

As shown in FIGS. 1 and 2, the diaper 1 includes an absorbent main body 2 capable of absorbing and holding excrement, and an exterior body 3 arranged on the non-skin facing surface side of the absorbent main body 2. There is. The exterior body 3 is a member that forms the outer shape of the diaper 1. The peripheral edge of the exterior body 3 forms contour lines of the ventral region F and the dorsal region R of the diaper 1, respectively. The exterior body 3 extends in the width direction Y and is arranged in the ventral region F, and is separate from the ventral exterior body 3F, which extends in the width direction Y and is arranged in the dorsal region R. It has a side exterior body 3R. The absorbent main body 2 is arranged so as to span the exterior bodies 3F and 3R arranged at predetermined intervals in the longitudinal direction X. Details of the absorbent body 2 will be described later.
In the following description, the ventral exterior body 3F and the dorsal exterior body 3R will be collectively referred to as the exterior body 3, and the contents of the description regarding the exterior body 3 will be described as the ventral exterior body 3F and the dorsal side unless otherwise specified. Applies to both exterior bodies 3R.

In the diaper 1, both side edges of the ventral exterior body 3F in the exterior body 3 in the width direction Y and both side edges of the dorsal exterior body 3R in the width direction Y are formed of an adhesive, a heat seal, an ultrasonic seal, or the like. A pair of sealing portions E and E are formed by being joined to each other by a joining means. As a result, the exterior bodies 3F and 3R are connected in an annular shape. Further, the diaper 1 is formed with a waist opening WH through which the wearer's torso is passed and a pair of leg openings LH through which the wearer's lower limbs are passed.

As described above, the exterior body 3 has a ventral exterior body 3F and a dorsal exterior body 3R separate from the ventral exterior body 3F, as shown in FIGS. 1 and 2. In each of the exterior bodies 3F and 3R, a plurality of thread-shaped or strip-shaped first elastic members 8 are arranged so as to extend in the width direction Y and in an extended state. As a result, both exterior bodies 3F and 3R are configured to be expandable and contractible in the width direction Y, respectively.

The first elastic member 8 is arranged on the peripheral edge of the waist opening WH composed of both exterior bodies 3F and 3R, and the exterior body 3 can exhibit elasticity in the width direction Y. Further, in the vicinity of the pair of leg openings LH, one or a plurality of thread-shaped or strip-shaped elastic members are arranged in an extended state in both outer regions in the width direction of the absorbent body 2 (shown in the figure). figure). As a result, substantially continuous annular leg gathers are formed at the opening edges of each of the pair of leg openings LH.

FIG. 3 schematically shows a laminated state of the sheet constituting the exterior body 3 and the elastic member in the maximum extended state. As shown in FIG. 3, the exterior body 3 has a multi-layer structure formed by laminating the inner layer sheet 31, the middle layer sheet 32, and the outer layer sheet 33. The inner layer sheet 31 is arranged on the skin facing surface side of the diaper 1 and is an inelastic sheet constituting the skin facing surface 1B of the diaper 1. The middle layer sheet 32 is an inelastic sheet arranged between the inner layer sheet 31 and the outer layer sheet 33. The outer layer sheet 33 is arranged on the non-skin facing surface side of the diaper 1 and constitutes the outer surface 1A of the diaper 1. The plurality of first elastic members 8 are arranged in an extended state between the inner layer sheet 31 and the middle layer sheet 32 so as to extend in the width direction Y. The adjacent first elastic members 8 are arranged so as not to intersect with each other at intervals along the longitudinal direction X. As a result, the exterior body 3 is arranged so as to have elasticity in the width direction Y.

As shown in FIG. 3, the outer layer sheet 33 constituting the exterior body 3 has a form of a stretchable sheet in which a plurality of thread-like or strip-shaped second elastic members 35 are joined to an inelastic and stretchable fiber sheet such as a non-woven fabric. It has become. In this telescopic sheet, the second elastic members 35 are arranged at intervals in a non-extended state so as to extend in one direction without intersecting each other. Further, it is preferable that each second elastic member 35 is directly bonded to the nonwoven fabric over the entire length of the nonwoven fabric constituting the outer layer sheet 33 by fusion.
In the outer layer sheet 33 in the present embodiment, the second elastic members 35 are arranged so as to extend in the width direction Y, whereby the outer layer sheet 33 itself can exhibit elasticity in the width direction Y. ..

The elastic sheet used as the outer layer sheet 33 is a sheet in which a plurality of second elastic members 35 are directly bonded to one surface of at least one non-woven fabric. As shown in FIG. 3, the outer layer sheet 33 preferably has a second elastic member 35 located between the two nonwoven fabrics 36, 36 and is directly bonded to the surface of each nonwoven fabric.
As such an elastic sheet, for example, the elastic sheets described in JP-A-2008-179128 and JP-A-2007-22066 can be used. Since such a stretchable sheet has a good texture, by using it as a constituent material for forming the outer surface of the diaper, the texture of the diaper becomes good and the appearance becomes excellent.

In the exterior body 3, the middle layer sheet 32 and the outer layer sheet 33, and the inner layer sheet 31 and the middle layer sheet 32 are joined to each other at predetermined portions by adhesion, joining, fusion and the like, respectively. An embodiment of an exterior body having the structure shown in FIG. 3 in a relaxed state is schematically shown in FIG. Further, FIG. 5 schematically shows another embodiment of joining the sheets in a relaxed state of the exterior body having the structure shown in FIG.
In the embodiment shown in FIG. 4, in the outer layer sheet 33 as the elastic sheet, a plurality of recessed portions 37 recessed from the non-skin facing surface toward the skin facing surface are formed in a scattered pattern, and the recessed portions 37 are formed. The outer surface (non-skin facing surface) 1A in the non-skin portion is substantially flat. When a plurality of recessed portions 37 are formed in a scattered pattern, it is also preferable that the plurality of recessed portions 37 are arranged in a row along the longitudinal direction X. At this time, the rows of the recessed portions 37 adjacent to each other in the longitudinal direction X may be arranged at the same pitch in the width direction Y, or may be offset by a predetermined pitch in the width direction. Further, the rows of the recessed portions 37 adjacent to each other in the width direction Y may be arranged at the same pitch in the longitudinal direction X.
For convenience of explanation, the outer layer sheet 33 in FIGS. 4 and 5 is shown as a single sheet, but as described above, expansion and contraction of a multi-layer structure including a plurality of non-woven fabrics and a plurality of second elastic members. It can be a sheet.

Regarding the middle layer sheet 32 and the outer layer sheet 33 in the exterior body 3, the middle layer sheet 32 and the outer layer sheet 33 are partially joined by the first joint portion 40 in a state where the outer layer sheet 33 can be extended. By this joining, a space (hollow portion) defined by the middle layer sheet 32 and the outer layer sheet 33 is formed. By "partially" as used herein, it means that the joints are formed intermittently and the joints are not formed without gaps over the entire surface of the sheet plane. Therefore, a plurality of first joints 40 are formed, for example, in a linear or strip shape, or are formed in a scattered spot shape. When the middle layer sheet 32 and the outer layer sheet 33 are partially joined, the region defined by the middle layer sheet 32 and the outer layer sheet 33 is preferably hollow.

In the detailed form between the sheets constituting the exterior body 3, as shown in FIGS. 4 and 5, the middle layer sheet 32 and the outer layer sheet 33 are partially joined via the first joint portion 40 to form the middle layer sheet. It is preferable that a hollow region is formed between the 32 and the outer layer sheet 33. Further, it is preferable that the inner layer sheet 31 and the middle layer sheet 32 have a portion where the inner layer sheet 31 and the middle layer sheet 32 are partially joined via the second joint portion 50 and the inner layer sheet 31 and the middle layer sheet 32 are not joined. At this time, in the exterior body 3, it is more preferable that the inner layer sheet 31 and the middle layer sheet 32 are both separated from the outer layer sheet 33, and a plurality of spaces S are formed between the middle layer sheet 32 and the outer layer sheet 33.

As shown in FIGS. 4 and 5, the space S in the present embodiment extends in the longitudinal direction X, which is a direction intersecting the extending direction (width direction Y) of the first elastic member 8, preferably orthogonal to each other. In addition, a plurality of rows are formed in the width direction Y, which is the extending direction of the first elastic member 8. Further, in the relaxed state of the exterior body 3, when the portion where the space S is formed is cross-sectionally viewed in the thickness direction, the inner layer sheet 31 and the middle layer sheet 32 integrally form a wavy shape and are separated from the outer layer sheet 33. ing.

In addition to this, when the exterior body 3 is viewed along the thickness direction Z at the position where the space S is formed, all of the inner layer sheet 31, the middle layer sheet 32, and the outer layer sheet 33 are joined to the exterior body 3. It is more preferable to have a non-existent site. That is, when the portion where the space S is formed is viewed along the thickness direction Z, as shown in FIGS. 4 and 5, the portion in the exterior body 3 has both the first joint portion 40 and the second joint portion 50. It is preferable to have a portion that does not exist in the thickness direction.

In the embodiments shown in FIGS. 4 and 5, for convenience of explanation, the inner layer sheet 31 and the middle layer sheet 32 are shown so as to be separated from each other, but the inner layer sheet 31 and the middle layer sheet 32 are in contact with each other. preferable.
The space S of the present embodiment is a hollow structure formed so that the middle layer sheet 32 and the outer layer sheet 33 are separated from each other. In the cross-sectional view along the width direction Y in the relaxed state of the exterior body 3, the region Sa between the inner layer sheet 31 and the middle layer sheet 32 at the position where the formation position of the space S and the position where the space S overlaps in the thickness direction Z is the respective sheets 31, 32. Are in contact with each other, so that a hollow region such as the space S is not formed. Depending on the material of the middle layer sheet 32 and the like, it is not prevented that a hollow region Sa is formed by separating a part or all of the inner layer sheet 31 and the middle layer sheet 32.

The first joint portion 40 and the second joint portion 50 described above are independently formed by a bonding method such as an adhesive, a heat seal, or an ultrasonic seal. Of these, at least the first joint portion 40 is preferably formed by an ultrasonic seal. By forming the first joint portion 40 by the ultrasonic seal, high joint strength can be exhibited even when the flat area of the joint portion is reduced in order to reduce the joint points. As a result, the formation of unintended folds on the outer layer sheet 33 can be further reduced.

With the above configuration, it is difficult to transmit the rigidity of the inner layer sheet 31 and the middle layer sheet 32 to the outer layer sheet 33, and the formation of unintended diapers in the outer layer sheet 33 can be reduced, or the outer layer sheet 33 originally has. Since the formation of desired folds can be further facilitated, the good texture originally possessed by the outer layer sheet 33 can be maintained, and the appearance of the diaper can be further improved. Further, when the diaper 1 is worn, there is an advantage that sufficient breathability can be ensured, stuffiness caused by wearing the diaper can be prevented, and the usability of the diaper can be enhanced.

In order to form the space S by separating the inner layer sheet 31 and the middle layer sheet 32 from the outer layer sheet 33, for example, in the manufacturing process of the exterior body, the first elastic member 8 in which the inner layer sheet 31 and the middle layer sheet 32 are extended is provided. The first sheet laminated body was formed by joining in an intervening state to form the second joint portion 50, and then the first sheet laminated body was in a state where the middle layer sheet 32 and the outer layer sheet 33 in the first sheet laminated body faced each other. And the outer layer sheet 33 can be joined together in an extended state to form the first joint portion 40. Alternatively, the outer layer sheet 33 in the stretched state and the middle layer sheet 32 are joined to form the first joint portion 40 to form a second sheet laminated body, and then the middle layer sheet 32 and the inner layer sheet 31 in the second sheet laminated body are formed. The second joint portion 50 can be formed by joining the second sheet laminate and the inner layer sheet 31 in the stretched state with the first elastic member 8 facing each other and in the stretched state interposed therebetween.

As shown in FIGS. 4 and 5, the first joint portion 40 is preferably formed in a scattered spot shape, and is formed in a scattered spot shape at a position corresponding to the recessed portion 37 in the outer layer sheet 33. Is more preferable. With such a configuration, it is difficult to transmit the contraction force generated by the first elastic member 8 to the outer layer sheet 33 side, and unintended wrinkles are formed on the outer layer sheet 33 constituting the outer surface 1A of the diaper 1. It can be made difficult, and the appearance of the diaper 1 can be kept good.

With respect to the inner layer sheet 31 and the middle layer sheet 32, the inner layer sheet 31 and the middle layer sheet 32 are at least partially joined by the second joint portion 50. The second joint portion 50 is formed in a linear or strip shape alone or in a plurality of rows, in a scattered spot shape, or is formed without gaps (so-called solid coating) over the entire sheet plane. When the second joint portion 50 is formed in a linear, strip-like or scattered spot shape, the second joint portion 50 may be formed only between the adjacent first elastic members 8 and may be formed only between the adjacent first elastic members 8. It may be formed so as to pass only through the member 8, or may be formed by a combination thereof. In the embodiments shown in FIGS. 4 and 5, for convenience of explanation, the inner layer sheet 31 and the middle layer sheet 32 are shown so as to be separated from each other, but the actual inner layer sheet 31 and the middle layer sheet 32 are in contact with each other. ..

The second joint portion 50 is preferably formed so as to pass only through the first elastic member 8. That is, it is preferable that the inner layer sheet 31 and the middle layer sheet 32 are formed and joined so that the second joint portion 50 is formed so as to pass only the first elastic member 8. In this case, the middle layer sheet 32 and the inner layer sheet 31 are partially joined. With such a configuration, it is difficult to transmit the shrinkage force generated by the first elastic member 8 to the outer layer sheet 33 side, and it is difficult to form unintended wrinkles on the outer layer sheet 33 constituting the outer surface of the diaper 1. Therefore, the appearance of the diaper 1 can be kept even better.

FIG. 5 schematically shows another embodiment of sheet joining in a relaxed state of an exterior body having the structure shown in FIG. Also in FIG. 5, for convenience of explanation, the outer layer sheet 33 is shown as a single sheet, but as described above, it is a stretchable sheet having a multi-layer structure including a plurality of non-woven fabrics and a plurality of second elastic members. obtain.
In the embodiment shown in FIG. 5, in the outer layer sheet 33 as the elastic sheet, a plurality of recessed portions 37 recessed from the non-skin facing surface toward the skin facing surface are formed in a scattered pattern, and the recessed portions 37 are formed. The non-skin facing surface 1A of the outer layer sheet 33 is a convex portion or a ridge portion protruding outward. As for the points not particularly described with respect to the embodiment shown in FIG. 5, the above-described description of the embodiment shown in FIG. 4 is appropriately applied. Even in the embodiment shown in FIG. 5, the effect of improving the appearance of the diaper is sufficiently exhibited.

Returning to the description of the other constituent members of the diaper 1, as shown in FIG. 2, the absorbent main body 2 has a rectangular shape extending along the longitudinal direction X when viewed in a plan view. The absorbent body 2 extends in the longitudinal direction X from the ventral region F to the dorsal region R. The absorbent main body 2 is joined to the Y center region in the width direction of each of the ventral exterior body 3F and the dorsal exterior body 3R by a joining means such as an adhesive.

As shown in FIGS. 1 and 2, the absorbent main body 2 has a liquid-permeable surface sheet 21 that forms the skin-facing surface of the diaper 1 and a liquid-impermeable or liquid-impermeable surface that forms the non-skin-facing surface. The leak-proof sheet 22 and the liquid-retaining absorber 23 are provided. Like the absorbent body 2, the absorbent body 23 has a long shape in the longitudinal direction X of the diaper 1, and is interposed and arranged between the surface sheet 21 and the leak-proof sheet 22. The surface sheet 21 and the leak-proof sheet 22 cover the entire surface of the absorber 23 and are joined by a known joining means such as an adhesive on the outer side of the side edge of the absorber 23 along the longitudinal direction X.

The absorber 23 typically comprises an absorbent core and a core wrap sheet covering the absorbent core (not shown). The absorbent core is composed of a fiber stack of hydrophilic fibers such as pulp fibers and a fiber stack in which a water-absorbent polymer is retained. The core wrap sheet consists of tissue paper or a permeable non-woven fabric. The core wrap sheet preferably covers the entire skin-facing surface side and non-skin-facing surface side of the absorbent core.

A pair of leak-proof cuffs 24, 24 made of a liquid-resistant or water-repellent and breathable sheet are provided on both sides of the absorbent body 2 on the skin-facing surface along the longitudinal direction X. In the vicinity of the free end of each leak-proof cuff 24, one or a plurality of thread-shaped elastic members 25 for forming a leak-proof cuff are arranged in an extended state along the longitudinal direction X. The leak-proof cuff 24 stands up at least in the inseam region M by contracting the leak-proof cuff forming elastic member 25 arranged in the extended state when the diaper 1 is worn, whereby the excrement such as urine is in the width direction Y. Stop the outflow to the outside.

As the surface sheet 21, the leak-proof sheet 22, and the absorber 23, those conventionally used for disposable diapers can be used without particular limitation. For example, as the surface sheet 21, various non-woven fabrics, perforated films, and the like can be used. As the leak-proof sheet 22, a resin film, a laminate of the resin film and a non-woven fabric, or the like can be used. As the absorbent core 23, an aggregate of hydrophilic fibers such as wood pulp and hydrophilized synthetic fibers, or an aggregate in which a water-absorbing polymer is retained can be used as the absorbent core, and the core can also be used. As the wrap sheet, the same one as the surface sheet 21 can be used. Further, as the sheet for forming the leak-proof cuff, the same sheet as the leak-proof sheet 22 can be used.

As the sheet material constituting the inner layer sheet 31, the middle layer sheet 32 and the outer layer sheet 33, a non-elastic fiber sheet such as a non-woven fabric can be used. The non-woven fabrics used for the inner layer sheet 31, the middle layer sheet 32, and the outer layer sheet 33 are independently used in the present technical field such as spunbond non-woven fabric, thermal bond non-woven fabric, spunlace non-woven fabric, melt blown non-woven fabric, and air-through non-woven fabric. Can be used.

Examples of the constituent materials of the first elastic member 8 and the second elastic member 35 include those using the following resins independently, or a molded product obtained by mixing the following resins with a plasticizer.
Examples of the resin constituting the elastic member include synthetic rubbers such as natural rubber, EVA rubber, styrene-butadiene rubber, butadiene rubber, isoprene rubber and neoprene rubber, and elastic resins such as polyurethane and thermoplastic elastomer. Examples of the thermoplastic elastomer include SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene). Examples thereof include olefin-based elastomers such as styrene-based elastomers, ethylene-based α-olefin elastomers and propylene-based elastomers obtained by copolymerizing ethylene, butene, octene and the like, polyester-based elastomers, and polyurethane-based elastomers. These constituent resins may be used alone or in combination of two or more.
Examples of the plasticizer include paraffin oil and various surfactants. These can be used alone or in combination of two or more.

Since the absorbent article having the above structure, preferably the disposable diaper, uses the elastic sheet as the outer layer sheet 33 constituting the outer surface of the absorbent article, it becomes difficult for macroscopic folds to be formed on the surface of the exterior body 3. The feel and texture of the exterior body 3 can be improved, and the appearance of the absorbent article can be improved.
Further, the first joint portion 40 is partially formed, and the total area of the second joint portion 50 is formed to be larger than the total area of the first joint portion 40 in the plan view of the exterior body 3. As a result, the elastic force generated by the expansion and contraction of the first elastic member 8 is mainly applied to the inner layer sheet 31 and the middle layer sheet 32, and the elastic force can be absorbed and the elastic force is applied to the outer layer sheet. It can be difficult to convey to the 33 side. As a result, the appearance is good, the high fit of the absorbent article to the wearer can be exhibited, and the appearance is good.
When the first elastic member 8 is contracted, folds that are not visible from the outside are likely to be formed on the inner layer sheet 31 and the middle layer sheet 32 as the first elastic member 8 contracts, while the outer layer sheet 33 has the first elasticity. Since unintended folds due to the shrinkage of the member 8 are less likely to be formed on the outside, the appearance is excellent when the absorbent article is attached and not attached, and the consumer's willingness to purchase and use can be enhanced. There is also an advantage.

In order to make the total area S2 of the second joint portion 50 larger than the total area S1 of the first joint portion 40 in the plan view of the exterior body 3, for example, the first joint portion 40 is partially formed. Further, the second joint portion 50 is continuously formed over the entire sheet, or the first joint portion 40 is partially formed, and the second joint portion 50 is made larger than the area of the first joint portion 40. It can be partially formed.
With such a configuration, when the first elastic member 8 arranged between the inner layer sheet 31 and the middle layer sheet 32 expands and contracts, the elastic force thereof is mainly applied to the inner layer sheet 31 and the middle layer sheet 32. It is hard to be given to the outer layer sheet 33. As a result, the dish can improve the adhesion of the diaper 1 to the wearer side, and it is difficult to transmit the elastic force generated by the first elastic member 8 to the outer layer sheet 33 side. As a result, it is possible to prevent unintended wrinkles from being formed on the outer layer sheet 33 constituting the outer surface of the diaper 1, maintain the texture of the outer layer sheet 33, and maintain a good appearance of the diaper 1.

Further, the configuration in which the total area S2 of the second joint portion 50 is larger than the total area S1 of the first joint portion 40 is the ventral exterior body 3F, which is the exterior body 3 located in the ventral region F, and the dorsal region R. It is preferable that at least one of the dorsal exterior body 3R, which is the exterior body 3 located in the above, is satisfied, and it is more preferable that the ventral exterior body 3F is satisfied with the above configuration. By providing the ventral exterior 3F with a configuration in which the total area S2 of the second joint 50 is larger than the total area S1 of the first joint 40, the consumer can be placed on the front side of the absorbent article (that is, on the ventral side of the wearer). When the area to be arranged) is visually recognized, the appearance of the absorbent article is improved and the appearance is improved, so that the consumer's willingness to purchase can be increased.

From the viewpoint of further improving the fit and appearance, the ratio P1 of the total area S1 of the first joint portion 40 to the flat area of the exterior body 3 in the maximum extended state is preferably 0.5% or more, more preferably 0.7%. The above is preferably 15% or less, and more preferably 5% or less.

From the viewpoint of preventing the increase in rigidity due to the formation of the joint portion, making it difficult to form folds, and further improving the appearance of the diaper, the second joint portion 50 may not be formed in the entire area of the exterior body 3 in the maximum extended state. preferable. Specifically, from the same viewpoint, the ratio P2 of the total area S2 of the second joint portion 50 to the flat area of the exterior body 3 in the maximum extended state is preferably 5% or more, more preferably 15 in terms of percentage. % Or more, preferably 50% or less, and more preferably 30% or less.

From the viewpoint of achieving further improvement in fit and appearance, in the exterior body 3, the first elastic member 8 and the outer layer sheet 33, which is an elastic sheet, have the same length along the extending direction of the elastic member. It is preferable that the extension ratio F1 of the first elastic member 8 is higher than the extension ratio F2 of the outer layer sheet 33 when stretched. For the difference between the elongation ratios F1 and F2 described above, for example, a polyurethane resin thread-like rubber was used as the first elastic member 8, and a styrene-based elastomer described later was used as the second elastic member in the outer layer sheet 33 in a thread-like form. It is preferable from the viewpoint that the absorbent article can be produced with high productivity.

Each elongation ratio of the first elastic member 8 and the outer layer sheet 33 can be measured by the following method. First, in a state where the absorbent article to be measured is stretched to the maximum, La is opened at regular intervals in the expansion / contraction direction of the first elastic member 8 and the outer layer sheet 33 by using an oil-based pen with respect to the exterior body in that state. Make two marks. When the elastic member is plasticized or cut by the component contained in the oil-based pen, two marks are made by using a water-based pen or a chaco pen instead of the oil-based pen. Next, the first elastic member 8 and the outer layer sheet 33 are cut out between the two marks. The length Lb of the cut out first elastic member 8 and the outer layer sheet 33 is measured in a non-stretched state. This measurement is performed three times for each of the first elastic member 8 and the outer layer sheet 33, and the formula expressed by "La / Lb", that is, the arithmetic mean value of the value calculated by dividing the interval La by the interval Lb. To obtain the elongation ratio (times). The interval La can be, for example, 100 mm.

The elongation ratio F1 of the first elastic member 8 measured by the above-mentioned measuring method is preferably 2.0 times or more, more preferably 2.3 times or more, preferably 3.2 times or less, still more preferably. It is 3.0 times or less. Further, the elongation ratio F2 of the outer layer sheet 33 under the same conditions is preferably 1.5 times or more, more preferably 2.0 times or more, preferably 3.0 times or less, still more preferably 2.7 times or less. ..

When the first joint portion 40 is formed in a scattered spot shape, it is preferable that the arrangement of the first joint portion 40 and the second joint portion 50 has a predetermined relationship in the plan view of the exterior body 3. 6 (a) and 6 (b) show an embodiment of the arrangement of the first joint portion 40 and the second joint portion 50 in a plan view of the outer body 3 when the outer body 3 is in the maximum extended state. ing.

In the embodiment shown in FIG. 6A, the formation position of the second joint portion 50 and the arrangement position of the first elastic member 8 are in the same state. In the embodiment shown in the figure, the outer layer sheet 33 and the middle layer sheet 32 are partially joined in a scattered pattern by the first joint portion 40, and the middle layer sheet 32 and the inner layer sheet 31 are joined to the second joint portion 50. It is partially linearly joined by.
Specifically, as shown in FIG. 6A, a plurality of first joints 40 are arranged so as to form a first joint row 4L along one direction in a plan view of the exterior body 3. It is preferable to have. Further, the second joint portion 50 is preferably formed in a linear or strip shape so as to extend in the width direction Y, and the second joint portion 50 and the first elastic member 8 are formed so as to overlap each other. Is more preferable. At this time, it is preferable that the virtual line L1 along the extending direction of the first joint portion row 4L and the virtual line L2 along the extending direction of the second joint portion 50 are non-parallel. In the present embodiment, the first joint row 4L is inclined and extends along a direction intersecting the longitudinal direction X and the width direction Y. Further, as a preferred embodiment of the second joint portion 50 in the present embodiment, as shown in FIG. 6, a plurality of second joint portions 50 are provided along the width direction Y so as to overlap the first elastic member 8 extending along the width direction Y. It is formed. Therefore, the virtual line L2 in the present embodiment extends along the width direction Y.
With such a configuration, it is possible to easily disperse the contraction force of the first elastic member 8 in a plurality of directions and make it difficult to transmit the contraction force to the outer layer sheet 33. Wrinkles formed on the surface of the exterior body can be reduced, and as a result, the appearance is excellent.

In the embodiment shown in FIG. 6 (b), a portion different from the embodiment shown in FIG. 6 (a) will be described, and the description of FIG. 6 (a) will be appropriately applied to points not particularly described.
In the embodiment shown in FIG. 6B, in the plan view of the exterior body 3, the first joint portion row 4L formed so that the plurality of first joint portions 40 extend in one direction is used. A second first joint row 4M formed so that a plurality of first joints 40 extend along one direction is formed.
The first first joint row 4L is inclined and extends along a direction intersecting the longitudinal direction X and the width direction Y. Further, the second first joint row 4M has an inclination opposite to that of the first first joint row 4L, and extends along a direction intersecting the longitudinal direction X and the width direction Y.

The first first joint row 4L is a virtual line L1 connecting an arbitrary first joint 40 and the first joint 40 closest to and adjacent to the first joint 40. When a plurality of virtual lines L1 are considered, the virtual line having the smallest acute-angled angle with the virtual line L2 along the extending direction of the second joint portion 50 is defined as the virtual line L1.
Similarly, the second first joint row 4M is a virtual line L9 connecting any first joint 40 with the first joint 40 closest to and adjacent to the first joint 40. When a plurality of virtual lines L9 are considered, among those virtual lines, the virtual line having the smallest acute-angled angle with the virtual line L2 along the extending direction of the second joint portion 50 is referred to as the virtual line L9.

Both the virtual line L1 along the extending direction of the first first joining portion row 4L and the virtual line L9 along the extending direction of the second first joining portion row 4M are extensions of the second joining portion 50. It is preferable that the virtual line L2 along the current direction is non-parallel.
Even with such a configuration, it is possible to reduce the occurrence of wrinkles on the surface of the exterior body formed by the manifestation of the contractile force of the first elastic member 8, and as a result, the appearance is excellent.

The angle θ (see FIG. 6) formed by the acute-angled side of the virtual line L1 and the virtual line L2 is independently larger than 0 degrees, more preferably 5 degrees or more, preferably 50 degrees or less, still more preferably 50 degrees or less. It is 30 degrees or less. It is also preferable that the virtual line L2 is parallel to the width direction Y. With such a configuration, it is possible to further improve the fit to the wearer, particularly the fit to the waist around the diaper, while having an excellent appearance. The angle formed by the acute angle side between the virtual line L9 and the virtual line L2 in FIG. 6B can also be within the range of the above-mentioned angle θ.

When the first joints 40 are formed in a scattered pattern, the first joints 40 are arranged so as to overlap a predetermined number within a predetermined length range of the first elastic member 8 in the plan view of the exterior body 3. It is also preferable to be there. Specifically, in the plan view of the exterior body 3, the number of the first joints 40 is preferably 1 or more, more preferably 10 per 100 mm in the maximum extension state along the extending direction of the first elastic member 8. As described above, the number is preferably 50 or less, and more preferably 30 or less. With such a configuration, it is possible to make it difficult to transmit the contraction force of the first elastic member 8 to the outer layer sheet 33, so that wrinkles formed on the surface of the exterior body are reduced and the appearance is excellent. Become a diaper. The number of the first joint portions 40 described above is based on the arithmetic mean value of the number of the first joint portions 40 measured when 10 first elastic members 8 are measured.

When the first joints 40 are formed in a scattered pattern, the distance between the first joints 40 and the distance between the first elastic members 8 in the longitudinal direction X in the maximum extension state of the exterior body 3 in the diaper 1 It is also preferable that and have a predetermined relationship. Specifically, in the maximum extension state of the exterior body 3 in the diaper 1, the distance W1 (see FIG. 6) between the first joints 40 adjacent to each other along the longitudinal direction X is the first elasticity adjacent to each other along the longitudinal direction X. It is preferably smaller than the spacing W2 (see FIG. 6) of the members 8, and more preferably 0.9 times or less the spacing W2. Further, the interval W1 is preferably larger than 0.5 times the interval W2, and more preferably 0.6 times or more the interval W2. That is, in the relationship between the interval W1 and the interval W2, it is preferable to satisfy at least the relationship of "0.5 × W2 <W1 <W2". With such a configuration, the contraction force of the first elastic member 8 is locally applied to the first joint portion 40 while maintaining the strength and texture that can withstand the use of the exterior body 3. Since it is possible to make it difficult to transmit the excessive contraction force of the first elastic member 8 to the outer layer sheet 33, the formation of unintended wrinkles due to the contraction force is further reduced, and the appearance is improved. Become a diaper.

In the maximum extension state of the exterior body 3 in the diaper 1, the distance W1 between the first joints 40 adjacent to each other along the longitudinal direction X is independently, preferably 1.0 mm or more, more preferably 4.0 mm or more. Yes, preferably 10.0 mm or less, more preferably 6.0 mm or less. Further, in the maximum extended state of the exterior body 3 in the diaper 1, the distance W2 between the first elastic members 8 adjacent to each other along the longitudinal direction X is independently, preferably 3.5 mm or more, more preferably 5.0 mm or more. It is preferably 20.0 mm or less, more preferably 11.0 mm or less.

Regarding the relationship between the dimensions of the first joint portion 40 and the first elastic member 8 in the width direction Y, the dimensions of the exterior body 3 in the diaper 1 in the relaxed state and the dimensions in the maximum extended state have a predetermined relationship. It is preferable to have. Specifically, the distance between the first joints 40 adjacent to each other along the width direction in the relaxed state is defined as the interval W5 (see FIG. 4), and the distance between the first joints 40 adjacent to each other along the width direction in the maximum extension state is defined as the interval W5 (see FIG. 4). When the interval W6 (see FIG. 6) is set, the ratio (W6 / W5) of the interval W6 to the interval W5 is defined as the ratio R1. Further, when the length along the extending direction of the first elastic member 8 in the relaxed state is W7 and the length along the extending direction of the first elastic member 8 in the maximum extended state is W8, the length is relative to W7. The ratio of the length W8 (W8 / W7) is defined as the ratio R2. At this time, the ratio of the ratio R1 to the ratio R2 (R1 / R2) is preferably 0.4 or more, more preferably 0.6 or more, preferably 1.0 or less, still more preferably 0.8 or less. .. With such a ratio, the local load of the contraction force of the first elastic member 8 can be reduced and the contraction force can be dispersed in the plane direction of the exterior body, which is caused by the contraction force. The formation of unintended wrinkles on the exterior is further reduced, resulting in a diaper with a better appearance.

The distance W5 between the first joints 40 adjacent to each other along the width direction Y in the relaxed state is independently, preferably 0.3 mm or more, more preferably 1.1 mm or more, and preferably 2.5 mm or less. More preferably, it is 2.0 mm or less. Further, the distance W6 between the first joint portions 40 adjacent to each other along the width direction in the maximum extension state is independently, preferably 1.0 mm or more, more preferably 3.0 mm or more, and preferably 5.0 mm. Below, it is more preferably 4.0 mm or less.
The ratio R1 of the interval W6 to the interval W5 is preferably 1.8 or more, more preferably 2.0 or more, preferably 3.0 or less, still more preferably 2.7 or less.

The ratio R2 of the length W8 of the first elastic member 8 to the length W7 of the first elastic member 8 in the relaxed state is synonymous with the extension magnification F1 of the first elastic member 8 described above. Therefore, the ratio R2 is preferably 2.0 or more, more preferably 2.3 or more, preferably 3.2 or less, still more preferably 3.0 or less.

FIG. 7 schematically shows a cross-sectional view of the exterior body 3 of the diaper 1 along the longitudinal direction X in the maximum extended state. The width direction Y in the figure is the front-back direction of the paper surface (not shown). As shown in the figure, the outer layer sheet 33 constituting the exterior body 3 is a stretchable sheet in which a plurality of second elastic members 35 are joined between two non-woven fabrics so as to extend in the width direction Y. Is preferable. Further, it is preferable that the first elastic member 8 and the second elastic member 35 have a portion where the elastic members 8 and 35 do not overlap each other. In the embodiment shown in FIG. 7, the elastic members 8 and 35 do not overlap each other in the thickness direction Z.
More specifically, in the plan view of the exterior body 3 in the diaper 1 in the maximum extended state, the ratio of the area of the region where the first elastic member 8 and the second elastic member 35 overlap to the total area of the second elastic member 35. However, it is more preferably 80% or less, more preferably 50% or less, still more preferably 0%, that is, it is further preferable that the elastic members 8 and 35 do not overlap each other in the thickness direction Z.
With such a configuration, the position where the shrinkage stress is generated in the first elastic member 8 and the position where the shrinkage stress is generated in the second elastic member 35 of the outer layer sheet 33 are made different from each other, and the shrinkage stress is generated by the elastic member. Since the stress can be dispersed, the formation of unintended wrinkles on the exterior body due to the contraction force is further reduced while sufficiently maintaining the adhesion to the wearer due to the contraction of the elastic member, and the appearance is improved. It will be an excellent diaper.

Further, FIG. 8 schematically shows a cross-sectional view of the exterior body 3 of the diaper 1 along the width direction Y in the maximum extended state. The longitudinal direction X in the figure is the front-back direction of the paper surface (not shown). As shown in the figure, when the exterior body 3 of the diaper 1 is in the maximum extended state, the total length T2 along the width direction Y of the second joint portion 50 is along the width direction Y of the first joint portion 40. It is preferably larger than the total length T1. With such a configuration, the contraction force of the first elastic member 8 can be easily transmitted to the inner layer sheet 31 and the middle layer sheet 32, and the fit to the wearer can be further improved. Further, since the contraction force of the first elastic member 8 can be made difficult to be transmitted to the outer layer sheet 33 side, it is difficult to form unintended wrinkles on the outer layer sheet 33 constituting the outer surface of the diaper 1, and the good texture originally possessed by the outer layer sheet 33 is made difficult. Can be maintained to improve the appearance of the diaper 1.

When the maximum extension length along the width direction Y of the exterior body 3 is the length Ty and the total length T1 of the first joint 40 along the extension direction of the joint row in the first joint 40 is the length. The ratio of the total length T1 to Ty (T1 / Ty) is preferably 0.05 or more, more preferably 0.10 or more, preferably 0.30 or less, still more preferably 0.20 or less. With such a range, the fit to the wearer and the appearance of the diaper can be further improved. The total length T1 is the total length of each first joint portion 40 when the joint portion row of the first joint portions 40 is viewed along the extending direction in a plan view of the exterior body 3 in the maximum extended state. Let the total length T1 be the arithmetic mean value when 10 points are measured. When there are a plurality of joint rows, the calculation is based on the total length of each first joint 40 when viewed along each joint row.

When the maximum extension length along the width direction Y of the exterior body 3 is the length Ty and the total length T2 of the second joint portion 50 along the extension direction of the second joint portion 50 is the total length Ty. The ratio of length T2 (T2 / Ty) is preferably 0.15 or more, more preferably 0.5 or more, preferably 1.0 or less, still more preferably 0.8 or less. With such a range, the fit to the wearer and the appearance of the diaper can be further improved. The total length T2 is when the total length of the second joint portion 50 when the second joint portion 50 is viewed along the extending direction is measured at 10 points in a plan view of the exterior body 3 in the maximum extended state. Let the arithmetic mean value of be the total length T2.

The maximum extension length Ty along the width direction Y of the exterior body 3 can be appropriately changed depending on the form of the target absorbent article, but is preferably 300 mm or more, more preferably 350 mm or more, and preferably 550 mm. Below, it is more preferably 500 mm or less.

The difference ((T2 / Ty)-(T1 / Ty)) between the ratio (T2 / Ty) and the ratio (T1 / Ty) is preferably 0.10 or more, more preferably 0.50 or more, and preferably 0.50 or more. It is 1.00 or less, more preferably 0.70 or less.
With such a range, the fit to the wearer and the appearance of the diaper can be further improved.

The exterior body 3 is only a portion where only the first joint portion 40 is present and only the second joint portion 50 when the inner layer sheet 31, the middle layer sheet 32 and the outer layer sheet 33 constituting the exterior body 3 are viewed along the thickness direction Z. Can have a site where the first joint 40 and the second joint 50 are present, and a site where neither the first joint 40 nor the second joint 50 is present.
Of these, when the exterior body 3 is viewed along the thickness direction Z, the outer layer sheet 33 and the middle layer sheet 32 are joined by the first joint portion 40, and the middle layer sheet 32 and the inner layer sheet 31 are joined. It is preferable to have a non-existent part. That is, it is preferable that the exterior body 3 has at least a portion where only the first joint portion 40 is present when viewed along the thickness direction Z thereof. With such a configuration, it is possible to make it difficult to transmit the contractile force of the first elastic member 8 to the outer layer sheet 33 side, so that the good texture originally possessed by the outer layer sheet 33 can be maintained and the diaper can be diapered. The appearance can be further improved.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment.

1 Absorbent article (disposable diaper)
2 Absorbent body 3 Exterior body 8 1st elastic member 31 Inner layer sheet 32 Middle layer sheet 33 Outer layer sheet 35 2nd elastic member 40 1st joint 50 2nd joint F Ventral region M Inseam region R Dorsal region X Longitudinal direction Y width direction

Claims (12)

An inseam region having a longitudinal direction corresponding to the anterior-posterior direction of the wearer and a width direction orthogonal to the longitudinal direction, and located between the ventral region and the dorsal region and the ventral region and the dorsal region. It has an absorbent main body arranged in a region from the ventral region to the dorsal region along the longitudinal direction, and an exterior body arranged on the non-skin facing surface side of the absorbent main body. It ’s an absorbent article,
The exterior body is between an inner layer sheet arranged on the skin facing surface side, an outer layer sheet arranged on the non-skin facing surface side and constituting the outer surface of the absorbent article, and the inner layer sheet and the outer layer sheet. It has an arranged middle layer sheet and a plurality of first elastic members between the inner layer sheet and the middle layer sheet so as to extend in the width direction.
The outer layer sheet is an elastic sheet and is
In the exterior body, the outer layer sheet and the middle layer sheet are partially joined by the first joint portion in a state in which the outer layer sheet is expandable, and the middle layer sheet and the inner layer sheet are secondly joined to each other. Formed at least partially joined by
When the absorbent article is in the maximum extended state, the total area of the second joint in the exterior body located at at least one of the ventral region and the dorsal region is the total area of the second joint portion in the plan view of the exterior body. An absorbent article that is larger than the total area of the first joint . An inseam region having a longitudinal direction corresponding to the anterior-posterior direction of the wearer and a width direction orthogonal to the longitudinal direction, and located between the ventral region and the dorsal region and the ventral region and the dorsal region. It has an absorbent main body arranged in a region from the ventral region to the dorsal region along the longitudinal direction, and an exterior body arranged on the non-skin facing surface side of the absorbent main body. It is an absorbent article
The exterior body is between an inner layer sheet arranged on the skin facing surface side, an outer layer sheet arranged on the non-skin facing surface side and constituting the outer surface of the absorbent article, and between the inner layer sheet and the outer layer sheet. It has an arranged middle layer sheet and a plurality of first elastic members between the inner layer sheet and the middle layer sheet so as to extend in the width direction.
The outer layer sheet is an elastic sheet and is
In the exterior body, the outer layer sheet and the middle layer sheet are partially joined by the first joint portion in a state in which the outer layer sheet can be stretched, and the middle layer sheet and the inner layer sheet are secondly joined to each other. Formed at least partially joined by
An absorbent article in which the total length of the second joint along the width direction is larger than the total length of the first joint along the width direction when the absorbent article is in the maximum elongation state . The absorbent article according to claim 1 or 2, wherein the elongation ratio of the first elastic member is higher than the elongation ratio of the outer layer sheet. The absorbent article according to any one of claims 1 to 3, wherein the first joint is formed in a scattered pattern. In the plan view of the exterior body, a plurality of first joints are arranged so as to form a first joint row along one direction.
The second joint is formed so as to extend in the width direction.
The absorbent article according to claim 4, wherein the virtual line along the extending direction of the first joint row and the virtual line along the extending direction of the second joint are non-parallel. 4. In a plan view of the exterior body, the first elastic member is arranged so as to overlap one or more first joints per 100 mm in length in the maximum extension state along the extending direction thereof. Or the absorbent article according to 5. In the maximum extension state of the absorbent article, the distance W1 of the first joints adjacent to each other along the longitudinal direction is smaller than the distance W2 of the first elastic members adjacent to each other along the longitudinal direction, and the said. The absorbent article according to any one of claims 4 to 6, which is larger than 0.5 times the interval W2. The ratio of the distance between the first joints adjacent along the width direction in the relaxed state of the absorbent article to the distance between the first joints adjacent along the width direction in the maximum extension state of the absorbent article. When the ratio is R1 and the ratio of the length of the first elastic member to the length of the first elastic member in the relaxed state is R2, the value of R1 / R2 is 0.4 or more. The absorbent article according to any one of claims 4 to 7, which is 0 or less. The outer layer sheet is a stretchable sheet in which a second elastic member arranged so as to extend in the width direction is joined between two non-woven fabrics.
In the plan view of the exterior body in the maximum extended state of the absorbent article, the ratio of the area of the region where the first elastic member and the second elastic member overlap to the total area of the second elastic member is 80. % Or less, the absorbent article according to any one of claims 1 to 8. In the exterior body, between the outer layer sheet and the middle layer sheet, both the middle layer sheet and the inner layer sheet are separated from the outer layer sheet and extend in a direction intersecting the extending direction of the first elastic member. The formed plurality of rows of spaces are provided in the extending direction of the first elastic member.
When the exterior body is viewed along the thickness direction at the position where the space is formed, the exterior body has a portion to which none of the inner layer sheet, the middle layer sheet, and the outer layer sheet is joined. The absorbent article according to any one of claims 1 to 9. The absorbent article according to any one of claims 1 to 10, wherein the inner layer sheet and the middle layer sheet are joined only via the first elastic member to form a second joint portion. When the exterior body is viewed along the thickness direction thereof, the outer layer sheet and the middle layer sheet are joined by the first joint portion, and the middle layer sheet and the inner layer sheet are joined to each other. The absorbent article according to any one of claims 1 to 11 , which has no site.

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