JP7071150B2 - Disposable absorbent goods - Google Patents

Description

The present invention relates to a pants-type disposable absorbent article.

Conventionally, as one of the absorbent articles that receive excrement from the wearer, a pants-type disposable diaper having a body opening at the upper end and a pair of leg openings at the lower end has been used. In pants-type disposable diapers, a torso elastic member is provided along the edge of the torso opening at the anterior and posterior portions located on the ventral and dorsal sides of the wearer. Further, a leg elastic member along the edge of the pair of leg openings is provided in the crotch portion located between the front portion and the rear portion. Further, the front portion and the rear portion are provided with an intermediate elastic member arranged between the body elastic member and the leg elastic member in the vertical direction.

In the pants-type disposable diaper of Patent Document 1, the anterior and posterior portions located on the ventral and dorsal sides of the wearer are adjacent to and absorb the first elastic region and the first elastic region near the edge of the waist opening. It is divided into a second expansion / contraction region that crosses the front end of the sex chassis and a third expansion / contraction region that is adjacent to the second expansion / contraction region and is located on both sides of the absorbent chassis. Then, by setting the stretch stress of the second stretch region to be equal to or higher than the stretch stress of the first stretch region, when the wearer bends forward, the extension of the first stretch region affects the second stretch region and the absorbent chassis. The creases on the front end are suppressed.

On the other hand, in Patent Document 2, in a pants-type disposable diaper, in order to prevent the upper end portion of a pair of band-shaped protrusions formed when the front portion and the rear portion are joined on both the left and right sides from biting into the wearer. In addition, the contraction force of the elastic member of the body along the edge of the opening of the body is devised. Specifically, in the waist circumference area where the body elastic member is arranged, the lateral contraction force due to the body elastic member arranged at the upper part causes the lateral contraction force due to the body elastic member arranged at the lower part. Less than force.

Japanese Unexamined Patent Publication No. 2009-240964 International Publication No. 2013/099510

By the way, in Patent Document 2, as described above, in the waist circumference region (that is, the region where the body elastic member is arranged) along the edge of the body opening, the contraction force of the upper region is reduced to the contraction of the lower region. Because it is less than force, if the disposable diaper absorbs excrement and becomes heavier, it may shift downward from the wearer's waist. On the other hand, if the contraction force of the elastic members arranged in the upper and lower regions is increased as a whole in order to prevent the disposable diaper from slipping, the contraction force of the body opening becomes excessively large, and the disposable diaper becomes disposable. It may be difficult to widen the body opening when wearing the diaper. As a result, it becomes difficult to pass the legs or the like through the disposable diaper, and the wearability (that is, ease of wearing) of the disposable diaper may decrease.

The second expansion / contraction region and the third expansion / contraction region of Patent Document 1 are regions where so-called body fit gathers are formed, and are not regions around the waist along the edge of the body opening. That is, Patent Document 1 does not have an idea of providing a plurality of regions having different contractile forces in the region around the waist of a disposable diaper.

The present invention has been made in view of the above problems, and it is intended to suppress the vertical displacement of the disposable absorbent article and to easily widen the body opening with a small force when the disposable absorbent article is attached. The purpose is to make it possible.

The invention according to claim 1 is a pants-type disposable absorbent article, which has an exterior sheet having a body opening at the upper end and a pair of leg openings at the lower end, and an exterior sheet on the wearer side of the exterior sheet. It is equipped with an absorber that is attached and absorbs excrement from the wearer, and the exterior sheet is located on the ventral side of the wearer and the back side of the wearer, and both ends are the front part. Along with being joined to the anterior portion and the posterior portion at a rear portion connected to both side ends of the body, a crotch portion continuous from the anterior portion and the posterior portion, and a waist circumference region along the edge of the torso opening. A torso elastic member that forms a torso opening gather by contracting, and a leg that is joined to the crotch along the edge of the pair of leg openings and forms a pair of leg opening gathers by contracting. An intermediate gather is formed by being joined to and contracted to the front portion and the rear portion in an intermediate elastic region which is a region between the partial elastic member and the body elastic member and the leg elastic member in the vertical direction. A first torso elastic member comprising an intermediate elastic member to be formed, wherein the torso elastic member is arranged substantially parallel to the edge of the torso opening in the first torso peripheral region which is the upper part of the torso circumference region. A member, and a second body elastic member arranged substantially parallel to the first body elastic member in a second waist circumference region, which is a lower region of the first waist circumference region in the waist circumference region. A third torso elastic member arranged substantially parallel to the second torso elastic member is provided in the third torso-circumferential region, which is a lower region of the second torso-circumferential region in the torso-circumferential region. In a state where the exterior sheet is stretched in the left-right direction, the first unit extension stress, which is the contraction force in the left-right direction per the unit width in the up-down direction in the first waist circumference region, is the up-down in the second waist circumference region. The third unit stretch, which is larger than the second unit stretch stress, which is the contraction force in the left-right direction per unit width in the direction, and is the contraction force in the left-right direction, which is the contraction force in the vertical direction in the third waist circumference region. The elongation rate of the first body elastic member is smaller than the extension rate of the third body elastic member in a state where the exterior sheet is stretched in the left-right direction, which is smaller than the stress.

The invention according to claim 2 is a pants-type disposable absorbent article, which has an exterior sheet having a body opening at the upper end and a pair of leg openings at the lower end, and an exterior sheet on the wearer side of the exterior sheet. It is equipped with an absorber that is attached and absorbs excrement from the wearer, and the exterior sheet is located on the ventral side of the wearer and the back side of the wearer, and both ends are the front part. Along with being joined to the anterior portion and the posterior portion at a rear portion connected to both side ends of the body, a crotch portion continuous from the anterior portion and the posterior portion, and a waist circumference region along the edge of the torso opening. A torso elastic member that forms a torso opening gather by contracting, and a leg that is joined to the crotch along the edge of the pair of leg openings and forms a pair of leg opening gathers by contracting. An intermediate gather is formed by being joined to and contracted to the front portion and the rear portion in an intermediate elastic region which is a region between the partial elastic member and the body elastic member and the leg elastic member in the vertical direction. A first torso elastic member comprising an intermediate elastic member to be formed, wherein the torso elastic member is arranged substantially parallel to the edge of the torso opening in the first torso peripheral region which is the upper part of the torso circumference region. A member, and a second body elastic member arranged substantially parallel to the first body elastic member in a second waist circumference region, which is a lower region of the first waist circumference region in the waist circumference region. A third torso elastic member arranged substantially parallel to the second torso elastic member is provided in the third torso-circumferential region, which is a lower region of the second torso-circumferential region in the torso-circumferential region. In a state where the exterior sheet is stretched in the left-right direction, the first unit extension stress, which is the contraction force in the left-right direction per the unit width in the up-down direction in the first waist circumference region, is the up-down in the second waist circumference region. The third unit stretch, which is larger than the second unit stretch stress, which is the contraction force in the left-right direction per unit width in the direction, and is the contraction force in the left-right direction, which is the contraction force in the vertical direction in the third waist circumference region. The elongation rate of the first body elastic member is the same as the extension rate of the second body elastic member in a state where the exterior sheet is stretched in the left-right direction, which is smaller than the stress .

The invention according to claim 3 is a pants-type disposable absorbent article, which has an exterior sheet having a body opening at the upper end and a pair of leg openings at the lower end, and an exterior sheet on the wearer side of the exterior sheet. It is equipped with an absorber that is attached and absorbs excrement from the wearer, and the exterior sheet is located on the ventral side of the wearer and the back side of the wearer, and both ends are the front part. Along with being joined to the anterior portion and the posterior portion at a rear portion connected to both side ends of the body, a crotch portion continuous from the anterior portion and the posterior portion, and a waist circumference region along the edge of the torso opening. A torso elastic member that forms a torso opening gather by contracting, and a leg that is joined to the crotch along the edge of the pair of leg openings and forms a pair of leg opening gathers by contracting. An intermediate gather is formed by being joined to and contracted to the front portion and the rear portion in an intermediate elastic region which is a region between the partial elastic member and the body elastic member and the leg elastic member in the vertical direction. A first torso elastic member comprising an intermediate elastic member to be formed, wherein the torso elastic member is arranged substantially parallel to the edge of the torso opening in the first torso peripheral region which is the upper part of the torso circumference region. A member, and a second body elastic member arranged substantially parallel to the first body elastic member in a second waist circumference region, which is a lower region of the first waist circumference region in the waist circumference region. A third torso elastic member arranged substantially parallel to the second torso elastic member is provided in the third torso-circumferential region, which is a lower region of the second torso-circumferential region in the torso-circumferential region. In a state where the exterior sheet is stretched in the left-right direction, the first unit extension stress, which is the contraction force in the left-right direction per the unit width in the up-down direction in the first waist circumference region, is the up-down in the second waist circumference region. The third unit stretch, which is larger than the second unit stretch stress, which is the contraction force in the left-right direction per unit width in the direction, and is the contraction force in the left-right direction, which is the contraction force in the vertical direction in the third waist circumference region. The waist circumference region is smaller than the stress and is formed by laminating a plurality of sheet members, and the number of layers of the seat member in the first waist circumference region is the number of layers of the seat member in the second waist circumference region. The number of layers of the seat member in the second waist circumference region is smaller than the number of layers of the seat member in the third waist circumference region.

The invention according to claim 4 is a pants-type disposable absorbent article, which has an exterior sheet having a body opening at the upper end and a pair of leg openings at the lower end, and an exterior sheet on the wearer side of the exterior sheet. It is equipped with an absorber that is attached and absorbs excrement from the wearer, and the exterior sheet is located on the ventral side of the wearer and on the back side of the wearer, and both ends are the front part. Along with being joined to the anterior portion and the posterior portion at a rear portion connected to both side ends of the body, a crotch portion continuous from the anterior portion and the posterior portion, and a waist circumference region along the edge of the body portion opening. A body elastic member that forms a body opening gather by contracting, and a leg that is joined to the crotch along the edge of the pair of leg openings and that contracts to form a pair of leg opening gathers. An intermediate gather is formed by being joined to and contracted to the front portion and the rear portion in an intermediate elastic region which is a region between the partial elastic member and the body elastic member and the leg elastic member in the vertical direction. A first body elastic member comprising an intermediate elastic member to be formed, wherein the body elastic member is arranged substantially parallel to the edge of the body opening in the first body circumference region which is the upper part of the body circumference region. A member, and a second body elastic member arranged substantially parallel to the first body elastic member in a second body circumference area, which is a lower region of the first body circumference area in the waist circumference area. The third body circumference region, which is a lower region of the second waist circumference region in the waist circumference region, is provided with a third body portion elastic member arranged substantially parallel to the second body portion elastic member. In a state where the exterior sheet is stretched in the left-right direction, the first unit stretch stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the first waist circumference region, is the vertical movement in the second waist circumference region. The third unit stretch, which is larger than the second unit stretch stress which is the contraction force in the left-right direction per unit width in the direction, and is the contraction force in the left-right direction per the unit width in the vertical direction in the third waist circumference region. The second body elastic member comprises a plurality of first elastic threads that are smaller than the stress and are arranged in the vertical direction and extend substantially parallel to the edges of the body opening. However, a plurality of second elastic threads arranged in the vertical direction and extending substantially parallel to the plurality of first elastic threads are provided, and the first pitch, which is the pitch of the plurality of first elastic threads in the vertical direction, is , Larger than the second pitch, which is the pitch of the plurality of second elastic threads in the vertical direction. Key.

The invention according to claim 5 is the disposable absorbent article according to claim 4 , wherein the lowermost first elastic thread among the plurality of first elastic threads and the plurality of second elastic threads are used. The vertical distance between the uppermost second elastic yarn and the second elastic yarn is larger than the second pitch.

The invention according to claim 6 is a pants-type disposable absorbent article, which has an exterior sheet having a body opening at the upper end and a pair of leg openings at the lower end, and an exterior sheet on the wearer side of the exterior sheet. It is equipped with an absorber that is attached and absorbs excrement from the wearer, and the exterior sheet is located on the ventral side of the wearer and the back side of the wearer, and both ends are the front part. Along with being joined to the anterior portion and the posterior portion at a rear portion connected to both side ends of the body, a crotch portion continuous from the anterior portion and the posterior portion, and a waist circumference region along the edge of the torso opening. A torso elastic member that forms a body opening gather by contracting, and a leg that is joined to the crotch along the edge of the pair of leg openings and that contracts to form a pair of leg opening gathers. An intermediate gather is formed by being joined to and contracted to the front portion and the rear portion in an intermediate elastic region which is a region between the partial elastic member and the body elastic member and the leg elastic member in the vertical direction. A first torso elastic member comprising an intermediate elastic member to be formed, wherein the torso elastic member is arranged substantially parallel to the edge of the torso opening in the first torso circumference region which is the upper part of the torso circumference region. A member, and a second body elastic member arranged substantially parallel to the first body elastic member in a second body circumference area, which is a lower region of the first body circumference area in the waist circumference region. A third torso elastic member arranged substantially parallel to the second torso elastic member is provided in the third torso-circumferential region, which is a lower region of the second torso-circumferential region in the torso-circumferential region. In a state where the exterior sheet is stretched in the left-right direction, the first unit extension stress, which is the contraction force in the left-right direction per the unit width in the up-down direction in the first waist circumference region, is the up-down in the second waist circumference region. The third unit elongation, which is larger than the second unit stretching stress which is the contraction force in the left-right direction per unit width in the direction, and is the contraction force in the left-right direction per the unit width in the vertical direction in the third waist circumference region. Less than the stress, the girth region is located above the upper end of the absorber.

The invention according to claim 7 is a pants-type disposable absorbent article, which has an exterior sheet having a body opening at the upper end and a pair of leg openings at the lower end, and an exterior sheet on the wearer side of the exterior sheet. It is equipped with an absorber that is attached and absorbs excrement from the wearer, and the exterior sheet is located on the ventral side of the wearer and on the back side of the wearer, and both ends are the front part. A rear portion connected to both ends of the body, a crotch portion continuous from the front portion and the rear portion, and a waist portion along the edge of the body opening to be joined to the front portion and the rear portion. A body elastic member that forms a body opening gather by contracting, and a leg that is joined to the crotch along the edge of the pair of leg openings and contracts to form a pair of leg opening gathers. An intermediate gather is formed by being joined to and contracted to the front portion and the rear portion in an intermediate elastic region which is a region between the partial elastic member and the body elastic member and the leg elastic member in the vertical direction. A first body elastic member comprising an intermediate elastic member to be formed, wherein the body elastic member is arranged substantially parallel to the edge of the body opening in the first body circumference region which is the upper part of the body circumference region. A member, a second body elastic member arranged substantially parallel to the first body elastic member in a second body area, which is a lower region of the first body area in the waist area. A third body elastic member arranged substantially parallel to the second body elastic member is provided in the third body area, which is a lower region of the second body area in the waist area. In a state where the exterior sheet is stretched in the left-right direction, the first unit stretch stress, which is the contraction force in the left-right direction per the unit width in the up-down direction in the first waistline region, is the up-down in the second waistline region. The third unit stretch, which is larger than the second unit stretch stress, which is the left-right contraction force per unit width in the direction, and is the left-right contraction force per unit width in the vertical direction in the third waist circumference region. In a state where the exterior sheet is stretched in the left-right direction, which is smaller than the stress , the intermediate unit stretch stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the intermediate elastic region, is the second unit stretch. Less than stress.
The invention according to claim 8 is the disposable absorbent article according to any one of claims 1 to 7, wherein the second body elastic member is repeatedly traversed up and down in the second waist circumference region. An adhesive layer extending in the left-right direction is further provided, and the adhesive layer provides a second body elastic member and a sheet member that directly contacts the second body elastic member in the second waist circumference region. Is joined.
The invention according to claim 9 is the disposable absorbent article according to any one of claims 1 to 8, wherein the exterior sheet is folded back toward the wearer at the edge of the body opening. The folded portion is further provided, and the first body portion elastic member and the second body portion elastic member are arranged between the portion facing the folded portion and the folded portion.
The invention according to claim 10 is the disposable absorbent article according to any one of claims 1 to 9, wherein the second unit elongation stress is 58% or more and 94 of the first unit elongation stress. % Or less.
The invention according to claim 11 is the disposable absorbent article according to any one of claims 1 to 10, wherein the width of the waist circumference region in the vertical direction is 50 mm or less.

In the present invention, it is possible to suppress the vertical displacement of the disposable absorbent article and easily widen the opening of the body.

It is a front view of the absorbent article which concerns on one Embodiment. It is a back view of the absorbent article. It is a top view of the absorbent article in the unfolded state. It is sectional drawing of the absorbent article. It is sectional drawing which shows a part of the absorbent article. It is a top view which shows a part of an absorbent article.

1 and 2 are front and rear views (that is, views of parts located on the ventral and dorsal sides of the wearer) of the disposable absorbent article 1 according to the first embodiment of the present invention, respectively. .. In the following description, the disposable absorbent article 1 is simply referred to as "absorbent article 1". As shown in FIGS. 1 and 2, the absorbent article 1 has a body opening 11 at the upper end (ie, the upper end in FIGS. 1 and 2) and a pair of leg openings 12 at the bottom. It is a pants-type disposable diaper that you have. The absorbent article 1 is, for example, an adult M size disposable diaper. The absorbent article 1 receives excrement from the wearer.

FIG. 3 is a plan view seen from the wearer side in a state where the absorbent article 1 is unfolded. The absorbent article 1 includes an exterior sheet 4 and an absorber 20. In the example shown in FIG. 3, the shape of the absorber 20 in a plan view is substantially rectangular. The shape of the absorber 20 in a plan view may be changed as appropriate. The exterior sheet 4 is provided with a body opening 11 and a pair of leg openings 12 (see FIGS. 1 and 2). The absorber 20 is mounted on the inner surface (that is, the surface on the wearer side) of the exterior sheet 4. The absorber 20 is a substantially sheet-like member that absorbs excrement from the wearer.

In the absorbent article 1, the upper portion in FIG. 3 covers the wearer's anterior side (ie, ventral skin) and the lower portion in FIG. 3 covers the wearer's posterior side (ie, dorsal skin). ). In the following description, the parts of the absorbent article 1 located on the ventral side and the dorsal side of the wearer are referred to as "anterior portion 401" and "rear portion 403", respectively. Further, in the absorbent article 1, the portion between the front portion 401 and the rear portion 403 is referred to as "inseam 402". The inseam 402 is continuous with the anterior 401 and the posterior 403. The inseam 402 covers the wearer's crotch. The anterior portion 401, inseam portion 402 and rear portion 403 of the absorbent article 1 are also the anterior portion, inseam lower portion and rear portion of the exterior sheet 4. In other words, the exterior sheet 4 includes a front portion 401, a crotch lower portion 402, and a rear portion 403. The absorber 20 reaches the rear portion 403 from the front portion 401 of the exterior sheet 4 via the crotch portion 402.

When the absorbent article 1 is manufactured, the exterior sheet 4 is bent at the inseam 402 together with the absorber 20. Then, with the crotch portion 402 facing downward, the inner surfaces of the left-right end portions of the front portion 401 of the exterior sheet 4 and the inner surfaces of the left-right end portions of the rear portion 403 are heated and pressed. It is connected by crimping or the like. As a result, as shown in FIGS. 1 and 2, a body opening 11 is formed at the upper ends of the front portion 401 and the rear portion 403. Further, a pair of leg openings 12 are formed on the left and right sides of the inseam 402 on the lower side of the front portion 401 and the rear portion 403.

FIG. 4 is a cross-sectional view of the absorbent article 1 cut at the position IV-IV shown in FIG. 3 (ie, inseam 402). In FIG. 4, for convenience of illustration, each configuration of the absorbent article 1 is drawn separately. The same applies to FIG. 5, which will be described later. As shown in FIGS. 3 and 4, the absorber 20 includes a main body portion 2 and a pair of side seats 3. The pair of side seats 3 are arranged on both side portions of the main body portion 2 (that is, both sides in the left-right direction perpendicular to the vertical direction). Each side sheet 3 is a substantially sheet-like member over approximately the entire length in the longitudinal direction of the main body 2 (that is, the direction parallel to the vertical direction when worn).

The main body 2 is a substantially sheet-like member, and includes a top sheet 21, a back sheet 23, and an absorption core 22. The top sheet 21 is a liquid-permeable sheet member. The back sheet 23 is a liquid-impermeable or liquid-repellent sheet member. The absorption core 22 is a substantially sheet-like member arranged between the top sheet 21 and the back sheet 23. The top sheet 21 covers the wearer-side surface of the absorbent core 22. The back sheet 23 covers the surface of the absorption core 22 opposite to the wearer.

The top sheet 21 captures the water in the excrement from the wearer and transfers the water to the absorption core 22. The absorption core 22 absorbs and fixes the water that has permeated through the top sheet 21 (that is, the water of the excrement from the wearer). The back sheet 23 prevents the water and the like of the excrement that has reached the back sheet 23 from seeping out to the outside of the main body 2.

In FIG. 3, the outline of the absorption core 22 of the absorber 20 is drawn by a thick broken line in order to facilitate the understanding of the figure. The same applies to FIGS. 1 and 2. As shown in FIG. 3, the width at both ends of the absorption core 22 in the longitudinal direction is larger than the width at the central portion in the longitudinal direction of the absorption core 22. In other words, the shape of the absorption core 22 in a plan view is a so-called hourglass shape. The back sheet 23 shown in FIG. 4 is joined onto the exterior sheet 4 with a hot melt adhesive or the like. As a result, the absorber 20 is fixed to the exterior sheet 4. The shape of the absorption core 22 in a plan view may be changed as appropriate.

Each of the pair of side seats 3 includes a joint portion 33 and a side wall portion 34. The joint portion 33 is a strip-shaped portion on one side of the bending line 39 provided over the entire length in the longitudinal direction in the side sheet 3. The joint portion 33 is joined to the upper side of the main body portion 2 (that is, the wearer side) by using a hot melt adhesive or the like in the vicinity of the lateral edge of the main body portion 2 over an approximately entire length in the longitudinal direction. The side wall portion 34 is a strip-shaped portion of the side sheet 3 on the other side of the bending line 39. The side wall portion 34 is a portion continuous from the pair of joint portions 33 at the bending line 39 (that is, the outer edge in the left-right direction of the joint portion 33). The side wall portion 34 extends on both side portions of the main body portion 2 over approximately the entire length in the longitudinal direction of the main body portion 2.

Each side wall portion 34 is overlapped on the joint portion 33 and fixed to the joint portion 33 at both ends in the longitudinal direction. The side wall portion 34 and the joint portion 33 are fixed by, for example, thermocompression bonding, ultrasonic bonding, or bonding with a hot melt adhesive or the like. The portion of each side wall portion 34 excluding both ends in the longitudinal direction (that is, the central portion in the longitudinal direction) is not joined to the joint portion 33 and can be separated from the joint portion 33. A side wall elastic member 35 is joined to the free end of each side wall 34. By contracting the side wall portion elastic member 35, the central portion in the longitudinal direction of the side wall portion 34 stands up, and a three-dimensional gather is formed. As a result, it is possible to prevent the excrement received by the absorber 20 between the pair of side wall portions 34 from leaking to the outside of the pair of side wall portions 34.

The top sheet 21 is formed of, for example, a liquid-permeable non-woven fabric (air-through non-woven fabric, point-bonded non-woven fabric, spunbond non-woven fabric, spunlace non-woven fabric, etc.). The nonwoven fabric is formed of, for example, hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) whose surface is hydrophilically treated with a surfactant. The nonwoven fabric may be formed of hydrophilic fibers such as cellulose, rayon or cotton.

The absorption core 22 contains, for example, at least one of a granular or fibrous highly absorbent material and an aggregate of hydrophilic fibers as an absorbent material. As the highly absorbent material, for example, a granular super absorbent polymer (SAP (Super Absorbent Polymer)) or a fibrous super absorbent fiber (SAF (Super Absorbent Fiber)) is used. The aggregate of the hydrophilic fibers is formed, for example, from crushed pulp fibers or cellulose fibers.

In the example shown in FIG. 4, the absorption core 22 is formed by wrapping a mixture of the above-mentioned aggregates of hydrophilic fibers with granular SAP with tissue paper, a liquid-permeable non-woven fabric, or the like. This makes it possible to prevent the aggregate of hydrophilic fibers from losing its shape and the SAP from falling off (particularly, falling off after absorbing liquid).

The backsheet 23 is formed of, for example, an impermeable or liquid-repellent nonwoven fabric (spunbonded nonwoven fabric, meltblow nonwoven fabric, SMS (spunbond, meltblow, spunbond) nonwoven fabric, etc.) formed of hydrophobic fibers. Alternatively, the backsheet 23 is formed of an impermeable or liquid repellent plastic film. The back sheet 23 may be a laminate of the non-woven fabric and the plastic film. When a plastic film is used for the back sheet 23, a breathable (that is, breathable) plastic film is used from the viewpoint of preventing stuffiness of the absorbent article 1 and improving the comfort of the wearer. Is preferable.

The sheet body of the side sheet 3 is formed of an impermeable or liquid-repellent nonwoven fabric (for example, spunbonded nonwoven fabric, melt blow nonwoven fabric, SMS nonwoven fabric) formed of hydrophobic fibers. As the side wall elastic member 35, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In this embodiment, the polyurethane thread is used as the side wall elastic member 35.

FIG. 5 is a cross-sectional view of a part of the absorbent article 1 cut at the position VV shown in FIG. FIG. 5 shows the front side of the absorbent article 1. The structure on the rear side of the absorbent article 1 is substantially the same as the structure on the front side shown in FIG. The exterior sheet 4 includes an exterior sheet main body 40, a leg elastic member 43 (see FIGS. 1 to 3), a body elastic member 44, and an intermediate elastic member 45. The leg elastic member 43, the body elastic member 44, and the intermediate elastic member 45 are joined to the exterior sheet main body 40.

The exterior sheet main body 40 includes a first exterior sheet 41, a second exterior sheet 42, and an end sheet 5. The second exterior sheet 42 is laminated on the inner surface (that is, the wearer side) of the first exterior sheet 41, and is bonded to the first exterior sheet 41 by bonding with a hot melt adhesive or thermocompression bonding by heat embossing. Be joined. The end sheet 5 is laminated on the inner surface of the second exterior sheet 42, and is bonded to the second exterior sheet 42 by bonding with a hot melt adhesive, thermocompression bonding by thermo-embossing, or the like. The end sheet 5 is provided over substantially the entire length of the exterior sheet 4 in the left-right direction.

The upper end portion of the absorber 20 is sandwiched between the lower end portion of the end sheet 5 and the second exterior sheet 42. The upper end portion of the absorber 20 is fixed to the second exterior sheet 42 and the end sheet 5 with a hot melt adhesive or the like. In the example shown in FIG. 5, the upper end 51 of the end sheet 5 is located below the upper end of the first exterior sheet 41 (that is, the edge 111 of the body opening 11) and the upper end 421 of the second exterior sheet 42. do. Further, the upper end 421 of the second exterior sheet 42 is located below the upper end of the first exterior sheet 41.

As shown in FIG. 5, the first exterior sheet 41 includes a folded-back portion 46 that is folded back toward the wearer at the edge 111 of the body opening 11. The lower end 461 of the folded-back portion 46 is located below the upper end 421 of the second exterior sheet 42 and the upper end 51 of the end sheet 5, and above the upper end 25 of the absorber 20. The upper end portion of the second exterior sheet 42 and the upper end portion of the end sheet 5 are sandwiched between the facing portion 47, which is a portion of the first exterior sheet 41 facing the folded portion 46, and the folded portion 46. The folded-back portion 46 is joined to the upper end portion of the end sheet 5 and the upper end portion of the second exterior sheet 42 with a hot melt adhesive or the like.

The first exterior sheet 41, the second exterior sheet 42, and the end sheet 5 of the exterior sheet main body 40 are formed of an impermeable or liquid-repellent nonwoven fabric formed of hydrophobic fibers, similarly to the back sheet 23. .. Alternatively, the first exterior sheet 41, the second exterior sheet 42, and the end sheet 5 may be a laminate of the nonwoven fabric and a liquid-impermeable or liquid-repellent plastic film. As the plastic film, it is preferable to use a film having moisture permeability. Further, as the first exterior sheet 41, the second exterior sheet 42, and the end sheet 5, a liquid-permeable nonwoven fabric may be used as in the top sheet 21. In the example shown in FIG. 5, the first exterior sheet 41, the second exterior sheet 42, and the end sheet 5 are non-woven fabric sheets, respectively.

Preferably, the first exterior sheet 41 and the second exterior sheet 42 are spunbonded nonwoven fabrics formed by melting a material containing a thermoplastic resin (for example, an olefin resin or a polyester resin) and a surfactant. The blending ratio of the surfactant in the material is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and preferably 5.0% by mass or less. , 3.5% by mass or less, more preferably. The olefin resin is preferably polyethylene or polypropylene. The polyester resin is preferably PET (Polyethyleneterephthalate), PBT (Polybutyleneterephtalate), or PTT (Polytrimethyleneterephtalate). The fineness of the spunbonded nonwoven fabric is preferably 1.0 dtex or more, and preferably less than 1.5 dtex. The basis weight of the spunbonded non-woven fabric is preferably 10 g / m ² or more, and preferably 35 g / m ² or less. From the viewpoint of breathability and strength, the basis weight of the spunbonded nonwoven fabric is more preferably 15 g / m ² or more, and more preferably 25 g / m ² or less.

As shown in FIGS. 1 and 2, the leg elastic member 43 is arranged along the edges 121 of the pair of leg openings 12. The leg elastic member 43 is, for example, a polyurethane thread, a band-shaped polyurethane film, or a thread-shaped or band-shaped natural rubber. In the examples shown in FIGS. 1 and 2, the leg elastic member 43 includes a plurality of leg elastic elements 431, each of which is a polyurethane thread. The plurality of leg elastic elements 431 are arranged substantially parallel to each other.

The leg elastic member 43 is arranged, for example, between the first exterior sheet 41 and the second exterior sheet 42 of the exterior sheet main body 40, and the first exterior sheet 41 and the second exterior sheet 42 are coated with a hot melt adhesive or the like. Be joined. The upper end portion of each leg elastic member 43 is located at the front portion 401 and the rear portion 403 of the exterior sheet 4. Further, a portion other than the upper end portion of each leg elastic member 43 is located at the crotch lower portion 402 of the exterior sheet 4. In the absorbent article 1, the contraction of the leg elastic member 43 causes the exterior sheet body 40 to contract in the vicinity of the pair of leg openings 12, and the pair of leg gathers (that is, the pair of legs) in contact with the wearer's legs. Part opening gathers) are formed.

The body elastic member 44 is joined to the front portion 401 and the rear portion 403 along the edge 111 of the body portion opening 11. The body elastic member 44 is provided over substantially the entire length of the front portion 401 and the rear portion 403 in the left-right direction. The body elastic member 44 is, for example, a polyurethane thread, a band-shaped polyurethane film, or a thread-shaped or band-shaped natural rubber. In the examples shown in FIGS. 1 and 2, the body elastic member 44 includes a plurality of body elastic elements, each of which is a polyurethane thread. The plurality of torso elastic elements extend substantially parallel in the left-right direction. In the example shown in FIG. 5, the body elastic member 44 is arranged between the folded-back portion 46 of the first exterior sheet 41 and the facing portion 47, and is joined to the exterior sheet main body 40. In the absorbent article 1, the contraction of the body elastic member 44 causes the exterior sheet body 40 to contract in the vicinity of the body opening 11, and waist gathers (that is, body opening gathers) in contact with the wearer's waist are formed. To.

The intermediate elastic member 45 is joined to the front portion 401 and the rear portion 403 in the region between the upper end portion of the leg elastic member 43 and the body elastic member 44 in the vertical direction. The intermediate elastic member 45 is provided over substantially the entire length of the front portion 401 and the rear portion 403 in the left-right direction. The intermediate elastic member 45 is, for example, a polyurethane thread, a band-shaped polyurethane film, or a thread-shaped or band-shaped natural rubber. In the example shown in FIG. 5, the intermediate elastic member 45 includes a plurality of intermediate elastic elements 451 each of which is a polyurethane thread. The plurality of intermediate elastic elements 451 extend substantially parallel to each other in the left-right direction. In the example shown in FIG. 5, the intermediate elastic member 45 includes 10 intermediate elastic elements 451.

The ten intermediate elastic elements 451 are located above the upper end 25 of the absorber 20 and do not overlap with the absorber 20. Further, the intermediate elastic member 45 is located below the lower end 461 of the folded-back portion 46 and does not overlap with the folded-back portion 46. In other words, the intermediate elastic member 45 is located between the absorber 20 and the folded-back portion 46. The 10 intermediate elastic elements 451 are located between the first exterior sheet 41 and the second exterior sheet 42, and are directly joined to the first exterior sheet 41 and the second exterior sheet 42 by a hot melt adhesive or the like. To.

The fineness of each intermediate elastic member 45 is, for example, 100 to 2500 dtex. In this embodiment, the fineness of each intermediate elastic element 451 is 470 dtex. Each intermediate elastic element 451 is joined to the first exterior sheet 41 and the second exterior sheet 42 in a state of being stretched about 3.0 times in the left-right direction (that is, at a stretch ratio of about 3.0 times). .. In the absorbent article 1, the outer sheet main body 40 contracts due to the contraction of the intermediate elastic member 45, and body fit gathers (that is, intermediate gathers) in contact with the lower abdomen and buttocks of the wearer are formed. The intermediate elastic member 45 may overlap with the absorber 20.

In the example shown in FIG. 5, the body elastic member 44 includes eight thread-shaped body elastic elements. In the following description, the two elastic threads near the edge 111 of the body opening 11 are referred to as "first elastic threads 441", and the four elastic threads located below the first elastic threads 441 are referred to as "second elastic threads". The two elastic threads located below the second elastic thread 442 are referred to as "elastic thread 442", and the two elastic threads located below the second elastic thread 442 are referred to as "third elastic thread 443". Further, the two first elastic threads 441 are collectively referred to as a "first body elastic member 444", and the four second elastic threads 442 are collectively referred to as a "second body elastic member 445". The third elastic thread 443 is collectively referred to as a "third body elastic member 446". That is, the body elastic member 44 has a first body elastic member 444 arranged substantially parallel to the edge 111 of the body opening 11, and a second body elastic member 44 arranged substantially parallel to the first body elastic member 444. It includes an elastic member 445 and a third body elastic member 446 arranged substantially parallel to the second body elastic member 445. In the example shown in FIG. 5, the first body elastic member 444, the second body elastic member 445, and the third body elastic member 446 are arranged between the folded-back portion 46 and the facing portion 47 of the first exterior sheet 41. Will be done.

The two first elastic threads 441 are arranged in the vertical direction and extend substantially parallel to the edge 111 of the body opening 11. The vertical distance between the two first elastic threads 441 (hereinafter referred to as "first pitch") is, for example, about 7 mm. The first pitch is the pitch in the vertical direction of the plurality of first elastic threads 441. The fineness of each first elastic thread 441 is, for example, 100 to 2500 dtex. In the present embodiment, the fineness of each first elastic yarn 441 is 940 dtex.

The two first elastic threads 441 are located above the upper end 421 of the second exterior sheet 42. In other words, the two first elastic threads 441 are located between the upper end 421 of the second exterior sheet 42 and the edge 111 of the body opening 11. The two first elastic threads 441 are located between the folded-back portion 46 and the facing portion 47 of the first exterior sheet 41, and are directly joined to the folded-back portion 46 and the facing portion 47 by a hot melt adhesive or the like. .. Each first elastic thread 441 is joined to the folded-back portion 46 and the facing portion 47 in a state of being stretched about 2.5 times in the left-right direction (that is, at a stretching rate of about 2.5 times). Each first elastic thread 441 is adhered to the folded-back portion 46 and the facing portion 47 by, for example, a hot melt adhesive applied to the first elastic thread 441 by a comb gun.

The four second elastic threads 442 are arranged in the vertical direction at approximately equal pitches and extend substantially parallel to each of the plurality of first elastic threads 441. The vertical distance (hereinafter referred to as "second pitch") between each of the two vertically adjacent second elastic threads 442 is, for example, about 3.5 mm. The second pitch is the pitch in the vertical direction of the plurality of second elastic threads 442. In the example shown in FIG. 5, the above-mentioned first pitch is larger than the second pitch. The vertical distance between the lowermost first elastic thread 441 of the plurality of first elastic threads 441 and the uppermost second elastic thread 442 of the plurality of second elastic threads 442 is also the second pitch. Greater than. No elastic member is arranged between the lowermost first elastic thread 441 and the uppermost second elastic thread 442. The fineness of each second elastic thread 442 is, for example, 100 to 2500 dtex. In the present embodiment, the fineness of each second elastic thread 442 is 940 dtex, similarly to the first elastic thread 441.

The four second elastic threads 442 are located below the upper end 421 of the second exterior sheet 42 and above the upper end 51 of the end sheet 5. In other words, the four second elastic threads 442 are located between the upper end 421 of the second exterior sheet 42 and the upper end 51 of the end sheet 5. The four second elastic threads 442 are located between the folded-back portion 46 of the first exterior sheet 41 and the second exterior sheet 42, and are directly attached to the folded-back portion 46 and the second exterior sheet 42 by a hot melt adhesive or the like. Is joined to. Each second elastic thread 442 is joined to the folded-back portion 46 and the second exterior sheet 42 in a state of being stretched about 2.5 times in the left-right direction (that is, at a stretching rate of about 2.5 times).

FIG. 6 is a plan view showing the upper part of the front portion 401 in a state where the absorbent article 1 is unfolded. The structure of the rear portion 403 of the absorbent article 1 is substantially the same as the structure of the front portion 401 shown in FIG. As shown in FIG. 6, in the region where the second body elastic member 445 is arranged, the second exterior sheet 42 (see FIG. 5) or the folded portion 46 that comes into direct contact with the second body elastic member 445 The adhesive layer 61 is provided. In FIG. 6, the adhesive layer 61 is drawn with a solid line in order to facilitate the understanding of the figure. When the adhesive layer 61 is provided on the second exterior sheet 42, the adhesive layer 61 is provided on the surface of the second exterior sheet 42 on the wearer side that comes into direct contact with the second body elastic member 445. .. When the adhesive layer 61 is provided on the folded-back portion 46, the adhesive layer 61 is provided on the surface of the folded-back portion 46 on the non-wearer side that comes into direct contact with the second body elastic member 445. The second body elastic member 445 is joined by the adhesive layer 61 to the sheet member (that is, the second exterior sheet 42 and the folded portion 46) that come into direct contact with the second body elastic member 445.

The adhesive layer 61 illustrated in FIG. 6 is formed by spiral coating. In the adhesive layer 61, the locus of the linear hot melt adhesive spirally (that is, spirally) laterally while repeatedly traversing the plurality of second elastic threads 442 of the second body elastic member 445 up and down. Extends to. The adhesive layer 61 may be formed by a method other than spiral coating. In the adhesive layer 61, preferably, the locus of the linear hot melt adhesive swings in the vertical direction in the region without completely covering the region where the second body elastic member 445 is provided. As a result, the second body elastic member 445 is repeatedly crossed up and down and extended in the left-right direction.

When the second elastic member 445 is joined to the outer sheet main body 40, a hot melt adhesive is applied to each of the second elastic threads 442 by a comb gun or the like. Therefore, the second body elastic member 445 is adhered to the second exterior sheet 42 and the folded portion 46 by the hot melt adhesive and the adhesive layer 61 described above. The adhesive layer 61 does not overlap with the first body elastic member 444 and the third body elastic member 446.

As shown in FIG. 5, the two third elastic threads 443 are arranged in the vertical direction and extend substantially parallel to each of the plurality of second elastic threads 442. The vertical distance between the two third elastic threads 443 (hereinafter referred to as "third pitch") is, for example, about 3.5 mm. The third pitch is the pitch in the vertical direction of the plurality of third elastic threads 443. The fineness of each third elastic thread 443 is, for example, 100 to 2500 dtex. In the present embodiment, the fineness of each third elastic thread 443 is 940 dtex, similarly to the first elastic thread 441 and the second elastic thread 442. The fineness of the first elastic thread 441, the second elastic thread 442, and the third elastic thread 443 is larger than the fineness of the intermediate elastic element 451.

The two third elastic threads 443 are located below the upper end 51 of the end sheet 5 and above the lower end 461 of the folded-back portion 46. In other words, the two third elastic threads 443 are located between the upper end 51 of the end sheet 5 and the lower end 461 of the folded portion 46. The two third elastic threads 443 are located between the facing portion 47 of the first exterior sheet 41 and the second exterior sheet 42, and are directly connected to the facing portion 47 and the second exterior sheet 42 by a hot melt adhesive or the like. Is joined to. Each third elastic thread 443 is joined to the facing portion 47 and the second exterior sheet 42 in a state of being stretched about 3.0 times in the left-right direction (that is, at a stretch ratio of about 3.0 times). Each third elastic thread 443 is adhered to the facing portion 47 and the second exterior sheet 42 by, for example, a hot melt adhesive applied to the third elastic thread 443 by a comb gun.

As described above, the plurality of first elastic threads 441 of the first body elastic member 444 and the plurality of second elastic threads 442 of the second body elastic member 445 have an elongation rate of about 2.5 times. It is joined to the exterior sheet body 40. Therefore, in a state where the exterior sheet 4 is stretched in the left-right direction (specifically, a state where the waist gather around the body opening 11 is stretched to the extent that wrinkles disappear), the stretch rate of the first body elastic member 444 is Is smaller than the elongation rate of the third body elastic member 446. Further, in a state where the exterior sheet 4 is stretched in the left-right direction, the stretch ratio of the second body elastic member 445 is substantially the same as the stretch ratio of the first body elastic member 444, and the stretch ratio of the third body elastic member 446 is substantially the same. It is smaller than the elongation rate.

The first elastic thread 441 of the first body elastic member 444, the second elastic thread 442 of the second body elastic member 445, and the third elastic thread 443 of the third body elastic member 446 are other. The elastic member (that is, the leg elastic member 43 and the intermediate elastic member 45) is colored in a different color from the elastic thread. Specifically, the elastic threads of the other elastic members have the same color (for example, white) as the exterior sheet body 40, and the first elastic thread 441, the second elastic thread 442, and the third elastic thread 443 have the same color (for example, white). The color is different from that of the exterior sheet main body 40 (for example, blue).

In the following description, the region in which the body elastic member 44 is arranged in the exterior sheet 4 is referred to as a “body circumference region 406”. Further, in the waist circumference region 406 which is a band-shaped region along the edge 111 of the body opening 11, the first body elastic member 444, the second body elastic member 445, and the third body elastic member 446 are arranged. The regions are referred to as "first waist circumference area 407", "second waist circumference area 408", and "third waist circumference area 409", respectively.

The first waist circumference region 407 is a band-shaped region located above the waist circumference region 406. The second waist circumference region 408 is a band-shaped region located below the first waist circumference region 407 in the waist circumference region 406. The third waist circumference region 409 is a band-shaped region located below the second waist circumference region 408 in the waist circumference region 406. The third waist circumference region 409 is the lower end portion of the waist circumference region 406, and the first waist circumference region 407 is the upper end portion of the waist circumference region 406. The second waist circumference region 408 is located between the first waist circumference region 407 and the third waist circumference region 409, and is vertically continuous with the first waist circumference region 407 and the third waist circumference region 409. In FIG. 5, the positions of the first waist circumference region 407, the second waist circumference region 408, and the third waist circumference region 409 in the vertical direction are indicated by arrows.

Specifically, the first waist circumference region 407 is substantially the center of the lowermost first elastic thread 441 and the uppermost second elastic thread 442 in the vertical direction from the edge 111 of the body opening 11 in the vertical direction. (For example, the area leading to the upper end 421 of the second exterior sheet 42). The second waist circumference region 408 is the lowermost side from substantially the center in the vertical direction of the lowermost first elastic yarn 441 and the uppermost second elastic yarn 442 (that is, the lower end of the first waist circumference region 407). It is a region extending to substantially the center (for example, the upper end 51 of the end sheet 5) in the vertical direction between the second elastic thread 442 and the uppermost third elastic thread 443. The third waist circumference region 409 is the lowermost side from substantially the center of the lowermost second elastic yarn 442 and the uppermost third elastic yarn 443 in the vertical direction (that is, the lower end of the second waist circumference region 408). This is a region that reaches a position below the third elastic thread 443 by half the distance of the third pitch. The lower end of the third waist circumference region 409 is located, for example, at substantially the same position in the vertical direction as the lower end 461 of the folded-back portion 46. The waist circumference region 406 is located above the upper end 25 of the absorber 20. The vertical width of the waist circumference region 406 is preferably 50 mm or less. The width is preferably 30 mm or more.

As described above, the waist circumference region 406 is formed by laminating a folded portion 46 and a facing portion 47 of the first exterior sheet 41, a second exterior sheet 42, and a plurality of sheet members which are end sheets 5. To. The first waist circumference region 407 is formed by the folded-back portion 46 and the facing portion 47 of the first exterior sheet 41. The second waist circumference region 408 is formed by the folded-back portion 46 and the facing portion 47 of the first exterior sheet 41, and the second exterior sheet 42. The third waist circumference region 409 is formed by the folded-back portion 46 and the facing portion 47 of the first exterior sheet 41, the second exterior sheet 42, and the end sheet 5. That is, the number of layers of the seat members in the first waist circumference region 407, the second waist circumference region 408, and the third waist circumference region 409 is 2, 3 and 4, respectively. Therefore, the number of layers of the seat member in the first waist circumference region 407 is smaller than the number of layers of the seat member in the second waist circumference region 408. Further, the number of layers of the seat member in the second waist circumference region 408 is smaller than the number of layers of the seat member in the third waist circumference region 409.

In the following description, the strip-shaped region in which the intermediate elastic member 45 is arranged in the exterior sheet 4 is referred to as an “intermediate elastic region 405”. Further, in a state in which the exterior sheet 4 is stretched in the left-right direction (specifically, a state in which the body fit gathers in the intermediate elastic region 405 are stretched to the extent that wrinkles disappear), the unit width in the vertical direction in the intermediate elastic region 405 is per. The contraction force in the left-right direction is called "intermediate unit extension stress". The intermediate elastic region 405 is a region extending from the uppermost intermediate elastic element 451 to the lowermost intermediate elastic element 451 in the vertical direction. The intermediate elastic region 405 is also located above the upper end 25 of the absorber 20 like the waist circumference region 406. The intermediate unit elongation stress is, for example, 0.038 N / mm to 0.060 N / mm. In this embodiment, the intermediate unit elongation stress is 0.049 N / mm.

Further, in the following description, in a state where the exterior sheet 4 is stretched in the left-right direction (specifically, a state where the waist gather region 406 is stretched to the extent that wrinkles disappear), the first waist circumference region 407, The lateral contraction force per unit width in the vertical direction in the second waist circumference region 408 and the third waist circumference region 409 is the "first unit extension stress", "second unit extension stress", and "third unit extension", respectively. Called "stress". The first unit elongation stress is, for example, 0.15 N / mm to 0.24 N / mm. The second unit elongation stress is, for example, 0.14 N / mm to 0.22 N / mm. The third unit elongation stress is, for example, 0.20 N / mm to 0.31 N / mm. In this embodiment, the first unit stretch stress, the second unit stretch stress, and the third unit stretch stress are 0.194 N / mm, 0.182 N / mm, and 0.255 N / mm, respectively.

The first unit stretch stress is larger than the second unit stretch stress and smaller than the third unit stretch stress. The second unit stretch stress is preferably 80% to 90% of the first unit stretch stress. The difference between the first unit stretch stress and the second unit stretch stress is the above-mentioned adhesive layer 61, the difference between the first pitch and the second pitch, and the first waist circumference region 407 and the second waist circumference region 408. This is due to the difference in the number of layers of the sheet member. Further, the intermediate unit stretch stress is smaller than the second unit stretch stress. Therefore, the intermediate unit stretch stress is smaller than the first unit stretch stress and the third unit stretch stress. The intermediate unit stretch stress is preferably 17% to 43% of the second unit stretch stress.

The measurement of the first unit tensile stress is performed as follows, for example, using "TENSILON (model number: RTG-1210)" of A & D Co., Ltd. as a measuring device. First, the first waist circumference region 407 of the absorbent article 1 is cut out in the vertical direction with a width of 8 mm over the entire width. Further, a measurement site of 200 mm and a gripping allowance are secured in the entire width direction, and the piece is cut to an appropriate length. Attach kraft tape to the gripping allowance and use it as a test piece. Subsequently, the gripping allowances provided at both ends of the test piece (that is, both ends in the direction in which each first elastic thread 441 extends) are gripped by the upper and lower chuck portions of the measuring device, and the movement amount of 0 mm is set as the origin. Before the measurement, the distance between the upper and lower chucks is set to 200 mm, and the test speed is set to 500 mm / min. The test piece is extended upward to a movement amount of 305 mm, and the load until it returns to the origin is measured. From the measured loads, select the load when the test piece is extended upward to a movement amount of 250 mm. Then, the average load, which is the average value of the multiple measurements of the load, is obtained. By dividing the average load by the vertical width of the test piece (8 mm in this case), the first unit elongation stress, which is the contraction force per unit width of the test piece, is obtained. The measurement of the second unit extension stress, the third unit extension stress and the intermediate unit extension stress is performed in the same manner. The vertical widths of the test pieces of the second waist circumference region 408, the third waist circumference region 409, and the intermediate elastic region 405 are 17 mm, 8 mm, and 95 mm, respectively.

As described above, the absorbent article 1 includes an exterior sheet 4 and an absorber 20. The exterior sheet 4 has a body opening 11 at the upper end and a pair of leg openings 12 at the lower end. The absorber 20 is attached to the wearer side of the exterior sheet 4 and absorbs excrement from the wearer. The exterior sheet 4 includes a front portion 401, a rear portion 403, a crotch lower portion 402, a body elastic member 44, a leg elastic member 43, and an intermediate elastic member 45. The anterior portion 401 is located on the ventral side of the wearer. The rear portion 403 is located on the back side of the wearer. Both ends of the rear portion 403 are connected to both ends of the front portion 401. The inseam 402 is continuous with the anterior 401 and the posterior 403.

The body elastic member 44 is joined to the front portion 401 and the rear portion 403 at the waist circumference region 406 along the edge 111 of the body portion opening 11. By contracting the body elastic member 44, the body opening gathers are formed. The leg elastic member 43 is joined to the inseam 402 along the edges 121 of the pair of leg openings 12. The contraction of the leg elastic member 43 forms a pair of leg opening gathers. The intermediate elastic member 45 is joined to the front portion 401 and the rear portion 403 at the intermediate elastic region 405 which is a region between the body elastic member 44 and the leg elastic member 43 in the vertical direction. By contracting the intermediate elastic region 405, intermediate gathers are formed.

The body elastic member 44 includes a first body elastic member 444, a second body elastic member 445, and a third body elastic member 446. The first body elastic member 444 is arranged substantially parallel to the edge 111 of the body opening 11 in the first body circumference region 407, which is the upper part of the waist circumference region 406. The second torso elastic member 445 is arranged substantially parallel to the first torso elastic member 444 in the second torso elastic member 408, which is a lower region of the first torso elastic member 407 in the torso elastic member 406. The third torso elastic member 446 is arranged substantially parallel to the second torso elastic member 445 in the third torso elastic member 409, which is a lower region of the second torso elastic member 408 in the torso elastic member 406.

In a state where the exterior sheet 4 is stretched in the left-right direction, the first unit extension stress, which is the contraction force in the left-right direction per unit width in the vertical direction in the first waist circumference region 407, is the vertical contraction force in the second waist circumference region 408. It is larger than the second unit elongation stress, which is the contraction force in the left-right direction per unit width. Further, the first unit stretch stress is smaller than the third unit stretch stress, which is the contraction force in the left-right direction per unit width in the vertical direction in the third waist circumference region 409.

Thus, by setting the first unit stretch stress and the second unit stretch stress to be smaller than the third unit stretch stress (that is, the unit stretch stress at the upper part of the waist circumference region 406 is smaller than the unit stretch stress at the lower part). By doing so), when the wearer tries to attach the absorbent article 1 and grips and expands the waist circumference region 406, the trunk opening 11 which is the upper end of the waist circumference region 406 can be easily expanded.

Further, by setting the second unit stretch stress to be smaller than the first unit stretch stress, the second waist circumference region 408 (that is, the second waist circumference region 408) to which the substantially central portion of the thumb contacts when the wearer grips and expands the waist circumference region 406 (that is,). , The area where the most force is applied in the waist circumference area 406) can be easily expanded. As a result, the body opening 11 can be expanded more easily. Therefore, the wearer's legs can be easily inserted into the body opening 11, and the wearability (that is, ease of wearing) of the absorbent article 1 can be improved. Further, when the absorbent article 1 is moved in the vertical direction along the wearer's legs, the edge 111 of the body opening 11 can be prevented from being caught by the wearer's body, and the movement can be smoothly performed. can.

In the absorbent article 1, instead of setting the second unit elongation stress relatively small, the third unit elongation stress is set relatively large, and the first unit elongation stress is the second unit elongation stress and the third unit elongation stress. By setting between them, the contraction force of the waist circumference region 406 as a whole can be suitably maintained. As a result, the waist circumference region 406 can be suitably brought into close contact with the wearer, and the vertical displacement of the absorbent article 1 during wearing can be prevented or suppressed.

As described above, the second unit stretch stress is 58% or more and 94% or less of the first unit stretch stress. As a result, the body opening 11 of the absorbent article 1 can be expanded more easily, and the vertical displacement of the absorbent article 1 can be suitably prevented or suppressed. The second unit stretch stress may be smaller than 58% of the first unit stretch stress and may be larger than 94%.

As described above, in the state where the exterior sheet 4 is stretched in the left-right direction, the stretch ratio of the first body elastic member 444 is smaller than the stretch ratio of the third body elastic member 446. As a result, it is possible to prevent the first body elastic member 444 located near the edge 111 of the body opening 11 from strongly contracting. As a result, it is possible to prevent the portion of the body elastic member 44 near the edge 111 from biting into the wearer's skin. Therefore, the wearing feeling of the absorbent article 1 can be improved.

In the absorbent article 1, when the exterior sheet 4 is stretched in the left-right direction, the stretch ratio of the first body elastic member 444 is the same as the stretch ratio of the second body elastic member 445. Thereby, when the absorbent article 1 is manufactured, the first body elastic member 444 and the second body elastic member 445 can be handled in the same manner. As a result, the production of the absorbent article 1 can be simplified.

As described above, the absorbent article 1 further includes an adhesive layer 61 extending in the left-right direction while repeatedly crossing the second body elastic member 445 up and down in the second body circumference region 408. The second body elastic member 445 and the sheet member (that is, the folded-back portion 46 and the second exterior sheet 42) that come into direct contact with the second body elastic member 445 in the second body circumference region 408 are the adhesive layer. It is joined by 61. As a result, the second waist circumference area 408 can be brought into contact with the wearer in a planar manner. As a result, it is possible to prevent the second body elastic member 445 from biting into the wearer's skin linearly. Further, since the adhesive layer 61 does not completely cover the second waist circumference region 408 but partially covers it, it suppresses the decrease in air permeability of the second waist circumference region 408 due to the adhesive layer 61. can do. As a result, the wearing feeling of the absorbent article 1 can be further improved. Further, by joining the second body elastic member 445 to the folded-back portion 46 and the second exterior sheet 42 by the adhesive layer 61, the second unit elongation stress can be easily made smaller than the first unit elongation stress. ..

In the absorbent article 1, the waist circumference region 406 is formed by laminating a plurality of sheet members. The number of layers of the seat member in the first waist circumference region 407 is smaller than the number of layers of the seat member in the second waist circumference region 408. The number of layers of the seat member in the second waist circumference region 408 is smaller than the number of layers of the seat member in the third waist circumference region 409. As described above, by reducing the number of layers of the seat member constituting the upper part of the waist circumference region 406, the rigidity of the portion near the edge 111 of the body portion opening 11 can be reduced. As a result, it is possible to prevent the portion of the body opening 11 near the edge 111 from biting into the wearer's skin. In addition, the body opening 11 can be expanded more easily. Further, by increasing the number of layers of the seat member constituting the lower portion of the waist circumference region 406, the rigidity of the lower portion of the waist circumference region 406 can be increased. As a result, it is possible to prevent the waist circumference region 406 from being damaged when the waist circumference region 406 is gripped and pulled up when the absorbent article 1 is attached. Further, the second unit stretch stress can be easily made smaller than the first unit stretch stress.

As described above, the first body elastic member 444 includes a plurality of first elastic threads 441 that are arranged in the vertical direction and extend substantially parallel to the edge 111 of the body opening 11. The second body elastic member 445 includes a plurality of second elastic threads 442 that are arranged in the vertical direction and extend substantially parallel to the plurality of first elastic threads 441. The first pitch, which is the pitch in the vertical direction of the plurality of first elastic threads 441, is larger than the second pitch, which is the pitch in the vertical direction of the plurality of second elastic threads 442. As a result, it is possible to prevent the first unit elongation stress from becoming excessively large. As a result, the body opening 11 can be expanded more easily. In addition, the second unit stretch stress can be easily made smaller than the first unit stretch stress.

Further, the vertical distance between the lowermost first elastic thread 441 of the plurality of first elastic threads 441 and the uppermost second elastic thread 442 of the plurality of second elastic threads 442 is the first. Greater than 2 pitches. Thereby, the influence of the second body elastic member 445 on the first body circumference region 407 can be reduced. As a result, the body opening 11 can be expanded more easily.

In the absorbent article 1, the exterior sheet 4 further includes a folded-back portion 46 that is folded back toward the wearer at the edge 111 of the body opening 11. The first body elastic member 444 and the second body elastic member 445 are arranged between the facing portion 47 facing the folded portion 46 and the folded portion 46. As a result, it is possible to prevent the edge 111 of the body opening 11 and the portion in the vicinity of the edge 111 from biting into the wearer's skin.

As described above, the waist circumference region 406 is located above the upper end 25 of the absorber 20. Therefore, it is possible to prevent the absorber 20 from forming wrinkles or the like due to the contraction of the body elastic member 44. As a result, it is possible to prevent or suppress the absorption of excrement by the absorber 20 due to the wrinkles and the like.

In the absorbent article 1, the width of the waist circumference region 406 in the vertical direction is 50 mm or less. As a result, it is possible to prevent the portion in close contact with the wearer's torso from becoming excessively large in the vertical direction, and further improve the wearing feeling of the absorbent article 1. From the viewpoint of preventing the absorbent article 1 from being displaced in the vertical direction, the width of the waist circumference region 406 in the vertical direction is preferably 30 mm or more. The width of the waist circumference region 406 in the vertical direction may be smaller than 30 mm or larger than 50 mm.

As described above, in the state where the exterior sheet 4 is stretched in the left-right direction, the intermediate unit elongation stress, which is the lateral contraction force per unit width in the vertical direction in the intermediate elastic region 405, is smaller than the second unit elongation stress. .. As a result, it is possible to prevent the intermediate elastic region 405 from being excessively strongly adhered to the wearer, and to further improve the wearing feeling of the absorbent article 1.

In the above-mentioned absorbent article 1, various changes can be made.

For example, in the absorbent article 1, the number of layers of the seat member in the first waist circumference region 407, the second waist circumference region 408, and the third waist circumference region 409 may be appropriately changed. Further, the magnitude relationship between the number of layers of the seat members in the first waist circumference region 407, the second waist circumference region 408, and the third waist circumference region 409 may be changed as appropriate.

The first pitch of the first body elastic member 444, the second pitch of the second body elastic member 445, and the third pitch of the third body elastic member 446 may be appropriately changed. The magnitude relationship between the first pitch, the second pitch, and the third pitch may also be changed as appropriate. The distance between the lowermost first elastic thread 441 and the uppermost second elastic thread 442 may be the second pitch or less.

The stretch ratios of the first body elastic member 444, the second body elastic member 445, and the third body elastic member 446 in a state where the exterior sheet 4 is extended in the left-right direction may be appropriately changed. Further, the magnitude relation of the extension ratios of the first body elastic member 444, the second body elastic member 445, and the third body elastic member 446 may be changed as appropriate.

The second body elastic member 445 may be arranged between the facing portion 47 of the first exterior sheet 41 and the second exterior sheet 42. In this case, the second body elastic member 445 and the sheet member (that is, the facing portion 47 and the second exterior sheet 42) that come into direct contact with the second body elastic member 445 in the second waist circumference region 408 are It is joined by the adhesive layer 61. The third body elastic member 446 may be arranged between the end sheet 5 and the second exterior sheet 42, or between the end sheet 5 and the folded portion 46.

In the second waist circumference region 408, the adhesive layer 61 does not necessarily have to be provided and may be omitted.

The leg elastic member 43, the body elastic member 44, and the intermediate elastic member 45 may be bonded to the exterior sheet main body 40 by a method other than bonding with a hot melt adhesive (for example, heat fusion bonding).

The absorbent article 1 may be a disposable diaper for adults other than M size, or may be a disposable diaper for children. Further, the structure of the absorbent article 1 described above may be used for a pants-type disposable absorbent article other than the disposable diaper.

The above-described embodiments and configurations in the respective modifications may be appropriately combined as long as they do not conflict with each other.

1 Absorbent article 4 Exterior sheet 11 Body opening 12 Leg opening 20 Absorber 25 (absorber) upper end 43 Leg elastic member 44 Body elastic member 45 Intermediate elastic member 46 Folded part 47 Opposing part 61 Adhesive layer 111 Edge (of torso opening) 121 Edge (of leg opening) 401 Front part 402 Crotch part 403 Rear part 405 Intermediate elastic area 406 Waist circumference area 407 1st waist circumference area 408 2nd waist circumference area 409 3rd waist circumference area 441 1st elastic thread 442 2nd elastic thread 443 3rd elastic thread 444 1st body elastic member 445 2nd body elastic member 446 3rd body elastic member

Claims (11)

It is a pants-type disposable absorbent item.
An exterior sheet with a torso opening at the top and a pair of leg openings at the bottom,
An absorber that is attached to the wearer side of the exterior sheet and absorbs excrement from the wearer,
Equipped with
The exterior sheet
The anterior part located on the ventral side of the wearer,
A rear portion located on the dorsal side of the wearer, with both ends connected to both ends of the anterior portion.
The inseam continuous from the anterior portion and the posterior portion,
A torso elastic member that forms a torso opening gather by being joined to and contracting to the anterior portion and the posterior portion in a waist circumference region along the edge of the torso opening.
A leg elastic member that is joined to the inseam along the edge of the pair of leg openings and contracts to form a pair of leg opening gathers.
An intermediate elastic member that is joined to the front portion and the rear portion and contracts to form an intermediate gather in an intermediate elastic region that is a region between the body elastic member and the leg elastic member in the vertical direction. When,
Equipped with
The body elastic member
A first torso elastic member arranged substantially parallel to the edge of the torso opening in the first torso area, which is the upper part of the torso area.
A second torso elastic member arranged substantially parallel to the first torso elastic member in a second torso elastic member, which is a lower region of the first torso elastic member in the torso circumference region.
A third torso elastic member arranged substantially parallel to the second torso elastic member in the third torso elastic member, which is a lower region of the second torso elastic member in the torso circumference region.
Equipped with
In a state where the exterior sheet is stretched in the left-right direction, the first unit stretching stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the first waist circumference region, is the said in the second waist circumference region. A third unit that is larger than the second unit elongation stress, which is the lateral contraction force per unit width in the vertical direction, and is the lateral contraction force per unit width in the vertical direction in the third waist circumference region. Less than the tensile stress ,
A disposable absorbent article characterized in that the elongation rate of the first body elastic member is smaller than the extension rate of the third body elastic member when the exterior sheet is stretched in the left-right direction . It is a pants-type disposable absorbent item.
An exterior sheet with a torso opening at the top and a pair of leg openings at the bottom,
An absorber that is attached to the wearer side of the exterior sheet and absorbs excrement from the wearer,
Equipped with
The exterior sheet
The anterior part located on the ventral side of the wearer,
A rear portion located on the dorsal side of the wearer, with both ends connected to both ends of the anterior portion.
The inseam continuous from the anterior portion and the posterior portion,
A torso elastic member that forms a torso opening gather by being joined to and contracting to the anterior portion and the posterior portion in a waist circumference region along the edge of the torso opening.
A leg elastic member that is joined to the inseam along the edge of the pair of leg openings and contracts to form a pair of leg opening gathers.
An intermediate elastic member that is joined to the front portion and the rear portion and contracts to form an intermediate gather in an intermediate elastic region that is a region between the body elastic member and the leg elastic member in the vertical direction. When,
Equipped with
The body elastic member
A first torso elastic member arranged substantially parallel to the edge of the torso opening in the first torso area, which is the upper part of the torso area.
A second torso elastic member arranged substantially parallel to the first torso elastic member in a second torso elastic member, which is a lower region of the first torso elastic member in the torso circumference region.
A third torso elastic member arranged substantially parallel to the second torso elastic member in the third torso elastic member, which is a lower region of the second torso elastic member in the torso circumference region.
Equipped with
In a state where the exterior sheet is stretched in the left-right direction, the first unit stretching stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the first waist circumference region, is the said in the second waist circumference region. A third unit that is larger than the second unit elongation stress, which is the lateral contraction force per unit width in the vertical direction, and is the lateral contraction force per unit width in the vertical direction in the third waist circumference region. Less than the tensile stress,
A disposable absorbent article characterized in that, in a state where the exterior sheet is stretched in the left-right direction, the stretch rate of the first body elastic member is the same as the stretch rate of the second body elastic member. It is a pants-type disposable absorbent item.
An exterior sheet with a torso opening at the top and a pair of leg openings at the bottom,
An absorber that is attached to the wearer side of the exterior sheet and absorbs excrement from the wearer,
Equipped with
The exterior sheet
The anterior part located on the ventral side of the wearer,
A rear portion located on the dorsal side of the wearer, with both ends connected to both ends of the anterior portion.
The inseam continuous from the anterior portion and the posterior portion,
A torso elastic member that forms a torso opening gather by being joined to and contracting to the anterior portion and the posterior portion in a waist circumference region along the edge of the torso opening.
A leg elastic member that is joined to the inseam along the edge of the pair of leg openings and contracts to form a pair of leg opening gathers.
An intermediate elastic member that is joined to the front portion and the rear portion and contracts to form an intermediate gather in an intermediate elastic region that is a region between the body elastic member and the leg elastic member in the vertical direction. When,
Equipped with
The body elastic member
A first torso elastic member arranged substantially parallel to the edge of the torso opening in the first torso area, which is the upper part of the torso area.
A second torso elastic member arranged substantially parallel to the first torso elastic member in a second torso elastic member, which is a lower region of the first torso elastic member in the torso circumference region.
A third torso elastic member arranged substantially parallel to the second torso elastic member in the third torso elastic member, which is a lower region of the second torso elastic member in the torso circumference region.
Equipped with
In a state where the exterior sheet is stretched in the left-right direction, the first unit stretching stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the first waist circumference region, is the said in the second waist circumference region. A third unit that is larger than the second unit elongation stress, which is the lateral contraction force per unit width in the vertical direction, and is the lateral contraction force per unit width in the vertical direction in the third waist circumference region. Less than the tensile stress,
The waist circumference region is formed by laminating a plurality of sheet members.
The number of layers of the seat member in the first waist circumference region is smaller than the number of layers of the seat member in the second waist circumference region, and the number of layers of the seat member in the second waist circumference region is the third waist circumference region. Disposable absorbent article characterized in that it is less than the number of layers of the sheet member in. It is a pants-type disposable absorbent item.
An exterior sheet with a torso opening at the top and a pair of leg openings at the bottom,
An absorber that is attached to the wearer side of the exterior sheet and absorbs excrement from the wearer,
Equipped with
The exterior sheet
The anterior part located on the ventral side of the wearer,
A rear portion located on the dorsal side of the wearer, with both ends connected to both ends of the anterior portion.
The inseam continuous from the anterior portion and the posterior portion,
A torso elastic member that forms a torso opening gather by being joined to and contracting to the anterior portion and the posterior portion in a waist circumference region along the edge of the torso opening.
A leg elastic member that is joined to the inseam along the edge of the pair of leg openings and contracts to form a pair of leg opening gathers.
An intermediate elastic member that is joined to the front portion and the rear portion and contracts to form an intermediate gather in an intermediate elastic region that is a region between the body elastic member and the leg elastic member in the vertical direction. When,
Equipped with
The body elastic member
A first torso elastic member arranged substantially parallel to the edge of the torso opening in the first torso area, which is the upper part of the torso area.
A second torso elastic member arranged substantially parallel to the first torso elastic member in a second torso elastic member, which is a lower region of the first torso elastic member in the torso circumference region.
A third torso elastic member arranged substantially parallel to the second torso elastic member in the third torso elastic member, which is a lower region of the second torso elastic member in the torso circumference region.
Equipped with
In a state where the exterior sheet is stretched in the left-right direction, the first unit stretching stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the first waist circumference region, is the said in the second waist circumference region. A third unit that is larger than the second unit elongation stress, which is the lateral contraction force per unit width in the vertical direction, and is the lateral contraction force per unit width in the vertical direction in the third waist circumference region. Less than the tensile stress,
The first elastic member is provided with a plurality of first elastic threads arranged in the vertical direction and extending substantially parallel to the edge of the opening of the body.
The second body elastic member includes a plurality of second elastic threads arranged in the vertical direction and extending substantially parallel to the plurality of first elastic threads.
A disposable absorbent article characterized in that the first pitch, which is the pitch of the plurality of first elastic threads in the vertical direction, is larger than the second pitch, which is the pitch of the plurality of second elastic threads in the vertical direction. .. The disposable absorbent article according to claim 4 .
The vertical distance between the lowermost first elastic thread among the plurality of first elastic threads and the uppermost second elastic thread among the plurality of second elastic threads is the second pitch. Disposable absorbent article characterized by being larger than. It is a pants-type disposable absorbent item.
An exterior sheet with a torso opening at the top and a pair of leg openings at the bottom,
An absorber that is attached to the wearer side of the exterior sheet and absorbs excrement from the wearer,
Equipped with
The exterior sheet
The anterior part located on the ventral side of the wearer,
A rear portion located on the dorsal side of the wearer, with both ends connected to both ends of the anterior portion.
The inseam continuous from the anterior portion and the posterior portion,
A torso elastic member that forms a torso opening gather by being joined to and contracting to the anterior portion and the posterior portion in a waist circumference region along the edge of the torso opening.
A leg elastic member that is joined to the inseam along the edge of the pair of leg openings and contracts to form a pair of leg opening gathers.
An intermediate elastic member that is joined to the front portion and the rear portion and contracts to form an intermediate gather in an intermediate elastic region that is a region between the body elastic member and the leg elastic member in the vertical direction. When,
Equipped with
The body elastic member
A first torso elastic member arranged substantially parallel to the edge of the torso opening in the first torso area, which is the upper part of the torso area.
A second torso elastic member arranged substantially parallel to the first torso elastic member in a second torso elastic member, which is a lower region of the first torso elastic member in the torso circumference region.
A third torso elastic member arranged substantially parallel to the second torso elastic member in the third torso elastic member, which is a lower region of the second torso elastic member in the torso circumference region.
Equipped with
In a state where the exterior sheet is stretched in the left-right direction, the first unit stretching stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the first waist circumference region, is the said in the second waist circumference region. A third unit that is larger than the second unit elongation stress, which is the lateral contraction force per unit width in the vertical direction, and is the lateral contraction force per unit width in the vertical direction in the third waist circumference region. Less than the tensile stress,
A disposable absorbent article characterized in that the waist circumference region is located above the upper end of the absorber. It is a pants-type disposable absorbent item.
An exterior sheet with a torso opening at the top and a pair of leg openings at the bottom,
An absorber that is attached to the wearer side of the exterior sheet and absorbs excrement from the wearer,
Equipped with
The exterior sheet
The anterior part located on the ventral side of the wearer,
A rear portion located on the dorsal side of the wearer, with both ends connected to both ends of the anterior portion.
The inseam continuous from the anterior portion and the posterior portion,
A torso elastic member that forms a torso opening gather by being joined to and contracting to the anterior portion and the posterior portion in a waist circumference region along the edge of the torso opening.
A leg elastic member that is joined to the inseam along the edge of the pair of leg openings and contracts to form a pair of leg opening gathers.
An intermediate elastic member that is joined to the front portion and the rear portion and contracts to form an intermediate gather in an intermediate elastic region that is a region between the body elastic member and the leg elastic member in the vertical direction. When,
Equipped with
The body elastic member
A first torso elastic member arranged substantially parallel to the edge of the torso opening in the first torso area, which is the upper part of the torso area.
A second torso elastic member arranged substantially parallel to the first torso elastic member in a second torso elastic member, which is a lower region of the first torso elastic member in the torso circumference region.
A third torso elastic member arranged substantially parallel to the second torso elastic member in the third torso elastic member, which is a lower region of the second torso elastic member in the torso circumference region.
Equipped with
In a state where the exterior sheet is stretched in the left-right direction, the first unit stretching stress, which is the contraction force in the left-right direction per the unit width in the vertical direction in the first waist circumference region, is the said in the second waist circumference region. A third unit that is larger than the second unit elongation stress, which is the lateral contraction force per unit width in the vertical direction, and is the lateral contraction force per unit width in the vertical direction in the third waist circumference region. Less than the tensile stress,
When the exterior sheet is stretched in the left-right direction, the intermediate unit stretch stress, which is the contraction force in the left-right direction per unit width in the vertical direction in the intermediate elastic region, is smaller than the second unit stretch stress. Disposable absorbent article characterized by. The disposable absorbent article according to any one of claims 1 to 7 .
Further provided with an adhesive layer extending in the left-right direction while repeatedly crossing the second body elastic member up and down in the second body circumference region.
Disposable absorbability, characterized in that the adhesive layer joins the second body elastic member and the sheet member in direct contact with the second body elastic member in the second body circumference region. Goods. The disposable absorbent article according to any one of claims 1 to 8 .
The exterior sheet further comprises a folded portion that is folded back toward the wearer at the edge of the body opening.
A disposable absorbent article, wherein the first body elastic member and the second body elastic member are arranged between a portion facing the folded portion and the folded portion. The disposable absorbent article according to any one of claims 1 to 9 .
A disposable absorbent article characterized in that the second unit stretch stress is 58% or more and 94% or less of the first unit stretch stress. The disposable absorbent article according to any one of claims 1 to 10.
A disposable absorbent article characterized in that the width of the waist circumference region in the vertical direction is 50 mm or less.

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