WO2020136917A1

WO2020136917A1 - Absorbent article

Info

Publication number: WO2020136917A1
Application number: PCT/JP2018/048619
Authority: WO
Inventors: 工藤　悦子
Original assignee: ユニ・チャーム株式会社
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-07-02
Also published as: CN113226237B; CN113226237A

Abstract

An absorbent article according to one embodiment of the present application has: a longitudinal direction; a width direction that is orthogonal to the longitudinal direction; a front waist region; a rear waist region; a crotch region positioned between the front waist region and the rear waist region; an absorbent core; an absorbent body that includes the absorbent core and is positioned so as to span the front waist region and the rear waist region; a front exterior member that is positioned further to the non-skin-surface side than the absorbent body in the front waist region; a rear exterior member that is positioned further to the non-skin-surface side than the absorbent body in the rear waist region, and is separate from the front exterior member; and an elastic member that has elasticity in the width direction in the front waist region. The elastic member has at least one curved elastic member that curves toward the front side over the interval from the center in the width direction to the outside in the width direction. At the center in the width direction, the rear end edge of the curved elastic member is positioned further to the front side than the rear end edge of the front exterior member

Description

Absorbent article

The present invention relates to absorbent articles.

Conventionally, there is known an absorbent article having a curved elastic member that curves from the center in the width direction toward the outside in the width direction to the front side (for example, see Patent Document 1).

The curved elastic member is arranged in the crotch region at the center in the width direction. As a result, the absorbent core is pulled up to the front side (waist opening side) due to the contraction of the bending elastic member, so that the absorbent core is pulled toward the wearer's body.

JP-A-10-127687

However, in the absorbent article of Patent Document 1, it is difficult for the exterior body to fit the wearer's body in the front waist region, and improvement of the fit of the exterior body in the front waist region has been demanded.

Therefore, an absorbent article that improves the fit of the exterior body in the front waist area is desired.

The absorbent article according to one aspect has a front and rear direction, a width direction orthogonal to the front and rear direction, a front waistline region, a rear waistline region, and an inseam arranged between the front waistline region and the rear waistline region. Region, an absorbent core, an absorbent main body including the absorbent core, and arranged across the front waistline region and the rear waistline region, and a non-skin surface than the absorbent body in the front waistline region. A front exterior body disposed on the side, a rear exterior body that is disposed on the non-skin surface side of the absorbent main body in the rear waistline region, and is a separate body from the front exterior body, and in the front waistline region. An elastic member having elasticity in the width direction. The elastic member includes one or more curved elastic members that are curved forward from the center in the width direction toward the outside in the width direction. At the center in the width direction, the rear end edge of the curved elastic member is arranged on the front side of the rear end edge of the front exterior body.

The absorbent article according to one aspect has a front and rear direction, a width direction orthogonal to the front and rear direction, a front waistline region, a rear waistline region, and an inseam arranged between the front waistline region and the rear waistline region. Region, an absorbent core, an absorbent main body including the absorbent core, and arranged across the front waistline region and the rear waistline region, and on the non-skin surface side of the absorbent main body, at least the front An exterior body arranged in the waistline region and the rear waistline region, and an elastic member having elasticity in the width direction in the front waistline region. The elastic member includes one or more curved elastic members that are curved forward from the center in the width direction toward the outside in the width direction. At least one curved elastic member of the one or more curved elastic members is arranged in a region that does not overlap the absorbent core.

It is a front view of the absorptive article concerning an embodiment. It is a top view of the absorptive article concerning an embodiment. FIG. 3 is a cross-sectional view taken along the line AA of the absorbent article shown in FIG. 2. FIG. 4 is a diagram for explaining the abdomen of the wearer. FIG. 5 is a schematic plan view of the absorbent article 10 according to the first modification. FIG. 6 is a schematic plan view of the front exterior body 20 of the absorbent article 10 according to the second modification. FIG. 7: is a figure for demonstrating the absorbent article which concerns on the example 3 of a change, and the example 4 of a change.

(1) Outline of Embodiment At least the following matters will be made clear by the present specification and the description of the accompanying drawings.

On the wearer's abdominal side, a recess extending in the width direction is generally formed at the lower end of the abdomen. The recess at the lower end of the abdomen is curved forward from the center in the width direction toward the outside in the width direction. At the center in the width direction, the recess at the lower end of the abdomen is generally located on the front side (waist opening side) of the rear end edge of the front exterior body.

Therefore, by arranging the rear end edge of the curved elastic member at the center in the width direction on the front side of the rear end edge of the front exterior body, the curved elastic member is recessed from the center in the width direction to the outer side in the width direction. It becomes easy to arrange along. Since the abdomen begins to bulge above the dent of the abdomen (on the waist opening side), the front exterior body is pulled up to fit the bulge of the abdomen by contraction of the bending elastic member. Thereby, the fit of the front exterior body can be improved.

According to a preferred aspect, at least one curved elastic member of the one or more curved elastic members may be arranged in a region that does not overlap with the absorbent core.

The contraction force of the curved elastic member that does not overlap the absorbent core is not hindered by the highly rigid absorbent core. Since the contracting force of the curved elastic member can be maintained, it is possible to fit the wearer's body while pulling up the exterior body in the front waistline region. As a result, the fit of the exterior body in the front waistline region can be improved.

Due to this, the contraction force of the curved elastic member that does not overlap the absorbent core is not hindered by the highly rigid absorbent core. Since the contracting force of the curved elastic member can be maintained, it is possible to fit the wearer's body while pulling up the exterior body in the front waistline region. As a result, the fit of the exterior body in the front waistline region can be improved.

Further, as described in Patent Document 1, when all the curved elastic members are arranged in the region overlapping with the absorbent core, the absorbent core is likely to be contracted in the width direction. Therefore, vertical wrinkles may enter the absorbent core, and the rigidity of the absorbent core may increase. In this case, it becomes difficult for the absorbent core to be deformed along the body of the wearer, and the fit of the exterior body in the front waistline region may deteriorate. Therefore, by arranging at least one bending elastic member of the one or more bending elastic members in a region that does not overlap the absorption core, it is possible to prevent the rigidity of the absorption core due to the bending elastic portion from increasing, and to reduce the front waistline region. It is possible to improve the fit of the exterior body.

According to a preferred aspect, the exterior body is a front exterior body arranged on the non-skin surface side of the absorbent main body in the front waistline region, and a non-skin surface than the absorbent main body in the rear waistline region. A rear exterior body that is disposed on the side and that is a separate body from the front exterior body, and in the center in the width direction, the rear end edge of the curved elastic member is larger than the rear end edge of the front exterior body. May also be arranged on the front side.

Therefore, by arranging the rear end edge of the curved elastic member at the center in the width direction on the front side of the rear end edge of the front exterior body, the curved elastic member is recessed from the center in the width direction to the outer side in the width direction. It becomes easy to arrange along. Since the abdomen begins to bulge above the dent of the abdomen (on the waist opening side), the front exterior body is pulled up to fit the bulge of the abdomen by contraction of the bending elastic member. Thereby, the fit of the front exterior body can be improved. According to a preferred aspect, at least one bending elastic member of the one or more bending elastic members may continuously extend in the width direction so as to straddle the center in the width direction.

Due to this, the curved elastic member that continuously extends in the width direction allows the exterior body in the front waistline region to fit the body at the center of the wearer's abdomen.

According to a preferred aspect, a side joint portion is provided that joins a side end portion of the front waistline region and a side end portion of the rear waistline region, and at the side end portion of the front waistline region, the bending elasticity is provided. The member may be disposed rearward of a range from the front end edge of the side joint portion to 20% of the entire front and rear direction of the side joint portion.

At the side end of the front waistline region, generally, the recess at the lower end of the abdomen is located behind the range from the front edge of the side joint to 20% of the entire front-rear direction of the side joint. Therefore, the curved elastic member can be arranged in the recess at the lower end of the abdomen at the side end of the front waistline region. Thereby, the exterior body can be fitted to the body even at the side end portion of the exterior body in the front waistline region.

According to a preferred aspect, all the curved elastic members that continuously extend in the width direction may be arranged in a region that does not overlap with the absorbent core.

By this, the contraction force of all the curved elastic members continuously extending in the width direction can be maintained without being hindered by the highly rigid absorbent core. In addition, as compared with the case where the curving elastic member does not extend continuously, a contracting force can be secured, so that the exterior body in the front waistline region can be fitted to the body more.

According to a preferred aspect, the elastic member may include a linear elastic member that linearly extends along the width direction, and the linear elastic member may be arranged in front of the curved elastic member.

When the curved elastic member is arranged along the recess of the lower end of the abdomen, the linear elastic member arranged on the front side (waist opening side) of the curved elastic member is arranged on the bulge of the abdomen. Accordingly, the outer body in the front waistline region can be fitted to the body in the bulge of the abdomen.

According to a preferred aspect, the elastic member includes a linear elastic member that extends linearly along the width direction, and the linear elastic member is more than a frontmost portion of a front end edge of the curved elastic member. It may be arranged on the rear side and on the front side of the front end edge of the absorbent core.

Due to this, the linear elastic member is easily pulled up by the curved elastic member. Therefore, in addition to the contraction of the curved elastic member, the contraction of the linear elastic member allows the exterior body in the front waistline region to be pulled up while fitting the exterior body in the front waistline region to the body. In addition, since the linear elastic member is arranged in a region that does not overlap the absorbent core, the contractile force of the linear elastic member can be maintained without being hindered by the absorbent core having high rigidity.

According to a preferred aspect, the linear elastic member may overlap at least one of the curved elastic members in the thickness direction.

　Because it is necessary to arrange the curved elastic member while bending the elastic member, it is difficult to arrange it and it is difficult to control the contraction force compared to the linear elastic member. Therefore, the easily controllable linear elastic member facilitates adjustment of the contraction force in the region in which the curved elastic member is arranged, and the exterior body in the front waistline region can be appropriately fitted to the body.

According to a preferred aspect, the absorbent main body includes a liquid-impermeable sheet, and the front end edge of the sheet is located in front of the curved elastic member at the center in the width direction. You can

The contraction of the curving elastic member causes the sheet having liquid impermeability to adhere to the wearer's body, making it more difficult for the excrement to move to the front side than the curving elastic member, so that the front leakage of the excrement can be suppressed. When the wearer is prone, the front edge of the liquid-impermeable sheet comes into close contact with the body due to the bulge of the abdomen. Thereby, when the wearer is prone, the front leakage of excrement can be suppressed.

According to a preferred aspect, the joining member may not be provided in a region of the absorbent main body that overlaps the bending elastic member in the thickness direction.

Due to this, it is possible to prevent the rigidity of the absorbent main body that overlaps the curved elastic member in the thickness direction from increasing, and the contraction of the curved elastic member is not hindered by the absorbent main body. Therefore, since it is possible to suppress the contraction force in the width direction of the curved elastic member, it is possible to fit the exterior body in the front waistline region to the body.

According to a preferred embodiment, a skin sheet is located on the skin side of the absorbent core, the skin sheet is a top sheet, and a pair of side sheets covering both outer side portions of the top sheet, Each of the pair of side sheets constitutes a leak-proof gather having a contracting portion that rises due to contraction of the leak-proof elastic member extending in the front-rear direction, and the curved elastic member has a front end edge of the contracting portion. It may be arranged on the front side.

The contraction of the curved elastic member lifts the exterior body in the front waist region, and it is possible to suppress the occurrence of wrinkles due to the contraction of the contraction part in the front-back direction. As a result, a storage space for excrement can be secured.

According to a preferred aspect, it has a skin sheet arranged on the skin side of the absorbent core, the skin sheet is a top sheet, and a pair of side sheets covering both outer side portions of the top sheet. And each of the pair of side sheets constitutes a leak preventive gather having a contracting portion that rises due to contraction of the leak preventive elastic member extending in the front-rear direction, and at least one of the one or more curved elastic members. The or may be arranged so as to overlap the contracted portion in the thickness direction.

Extending and contracting the curved elastic member spreads the leak-proof gathers outward in the width direction and makes it easier to lift them forward. Therefore, it is possible to prevent the leak-proof gathers from falling inward in the width direction and being pulled too far inward in the front-rear direction due to the contraction of the contracting portion. As a result, a storage space for excrement can be secured. In addition, since the waistline and the recess in the leg are continuous, it is possible to make the region that contracts along the recess by the curved elastic member and the contraction part continuous, so that it is absorbed into the wearer's body from the crotch region to the front waistline region. The sexual article can be stably fitted.

According to a preferred aspect, the elastic member has an overlapping elastic member extending in the width direction so as to overlap with the absorbent core in the thickness direction, and the overlapping elastic member is in the width direction of the absorbent core. Does not have to extend to the center of.

By increasing the contraction force in the width direction with the overlapping elastic member, it is possible to fit the outer body in the front waist region to the body. Furthermore, since the overlapping elastic member does not extend from one end in the width direction of the absorbent core to the other end, it is possible to prevent the absorbent core from shrinking in the width direction, and to secure the absorbent area.

According to a preferred aspect, a plurality of the bending elastic members are arranged in the front-rear direction, and the plurality of bending elastic members are a front bending elastic member arranged on the most front side in the front-rear direction, and the front-rear direction. A rear curving elastic member disposed on the rearmost side in the direction, and a curving elastic region that is a region between the front curving elastic member and the rear curving elastic member in the front-rear direction, When the region from the center of the front waistline region in the width direction to the side edge of the front waistline region in the width direction is divided into three in the width direction, a first side region located on the outermost side in the width direction, A first central region located on the innermost side in the width direction, and an intermediate region located between the first side region and the first central region in the width direction; The maximum length in the front-rear direction may be longer than the maximum length in the front-rear direction in the first central region.

Regarding the depression at the lower end of the abdomen, the length in the front-rear direction of the recess on the outer side in the width direction is longer than the length in the front-rear direction of the recess in the center of the width direction. Therefore, the arrangement of the curved elastic member in the front-rear direction can be aligned with the recess of the abdomen, and the exterior body in the front waistline region can be fitted more to the recess of the abdomen.

According to a preferred aspect, the difference between the maximum length and the minimum length in the front-rear direction of the bending elastic region in the intermediate region is equal to the maximum length and the minimum length in the front-rear direction of the bending elastic region in the first side region. And a difference between the maximum length and the minimum length in the front-rear direction of the bending elastic region in the first central region.

　The difference between the maximum length and the minimum length in the front-rear direction of the depression at the lower end of the abdomen is generally the largest in the intermediate region. Therefore, the arrangement of the curved elastic member in the front-rear direction can be aligned with the recess of the abdomen, and the exterior body in the front waistline region can be fitted more to the recess of the abdomen.

According to a preferred aspect, the length in the front-rear direction of the front-most front end edge and the rear-most rear end edge in the front-rear direction of the back-curve elastic member is the front-rear direction in the front-rear elastic member. It may be shorter than the length in the front-rear direction of the frontmost front edge and the rearmost rear edge.

▽The change in the front-back direction on the lower side (rear side) of the dent at the lower end of the abdomen is smaller than the change in the front-back direction on the upper side (front side) of the dent at the lower end of the abdomen. Therefore, it is possible to arrange the front bending elastic member in alignment with the upper end of the recess of the abdomen and the rear bending elastic member in alignment with the lower end of the recess of the abdomen. You can make it fit better.

According to a preferred aspect, in the first central region, the front bending elastic member is arranged rearward of a range from the front end edge of the side joint portion to 60% of the entire front and rear direction of the side joint portion. You can

In the first central region, the recess at the lower end of the abdomen is arranged behind the range from the front edge of the side joint to 60% of the entire front-rear direction of the side joint. Therefore, the arrangement of the curved elastic member in the front-rear direction can be aligned with the recess of the abdomen, and the exterior body in the front waistline region can be fitted more to the recess of the abdomen.

According to a preferred aspect, the plurality of bending elastic members are arranged in the front-rear direction, and in the first side region, the intervals between the adjacent bending elastic members in the front-rear direction may be equal intervals. ..

Extending and contracting force due to the bending elastic member is more likely to work uniformly in the front-back direction, and the rigidity of the bending elastic region can be made uniform. As a result, there is no portion where the rigidity of the bending elastic region is locally low, so that wrinkles and wrinkles are less likely to occur. As a result, the front exterior body can be fitted on the surface in the recess at the lower end of the abdomen.

According to a preferred aspect, when the front waistline region is divided into three in the width direction, a pair of second side regions located on the outermost side in the width direction and a second central region located on the innermost side in the width direction. And the contraction ratio of the bending elastic member in the second side region may be equal to or larger than the contraction ratio of the bending elastic member in the second central region.

Since the shrinkage ratio of the curved elastic member in the second central region is small, the absorbent core is less likely to shrink in the width direction, and the absorbent area can be secured. In addition, it becomes difficult to tighten the center of the abdomen, and it becomes difficult for rubber marks to be attached to the center of the abdomen. Further, since the contraction magnification of the bending elastic member in the second side region is large, the outer body in the front waistline region can be fitted more closely to the recess of the abdomen in the second side region, and the outer side in the width direction of the front waistline region can be further improved. Leakage can be suppressed.

According to a preferred aspect, the contraction magnification of each of the curved elastic members in the pair of second side regions may be the same.

This makes it possible to prevent one side from slipping to the crotch side by making the fit characteristics uniform on both outer sides in the width direction of the front waist region, and to prevent leakage on the outside in the width direction of the front waist region.

According to a preferred aspect, when the front waistline region is divided into three in the width direction, a pair of second side regions located on the outermost side in the width direction and a second central region located on the innermost side in the width direction. And a plurality of the curved elastic members are arranged in the front-rear direction, and the plurality of curved elastic members have an interval in the front-rear direction between adjacent curved elastic members in the second central region. A first bending elastic member arranged on the front side of the maximum area and a second bending elastic member arranged on the rear side of the area, and in the second central area, The contraction ratio of the two-curve elastic member may be smaller than the contraction ratio of the first curving elastic member.

In the second central region, the first curved elastic member allows the outer core body in the front waistline region to fit into the recess of the abdomen, while the second curved elastic member can prevent the absorbent core from shrinking.

(2) Overall Schematic Configuration of Absorbent Article Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of respective dimensions and the like are different from actual ones. Therefore, specific dimensions should be determined in consideration of the following description. Further, the drawings may include portions having different dimensional relationships and ratios.

The absorbent article may be a tape type or a pants type. The absorbent article may be a disposable diaper or a shorts-type sanitary napkin. The absorbent article of the embodiment is a pants-type disposable diaper. FIG. 1 is a schematic front view of an absorbent article 10 according to this embodiment. FIG. 2 is a schematic plan view of the disposable diaper 10 according to this embodiment. FIG. 3 is a sectional view taken along the line AA shown in FIG. FIGS. 2 and 3 show an expanded state in which the absorbent article 10 is expanded to a state in which wrinkles are not formed in a state in which the side joint portion 60 described later is expanded.

The absorbent article 10 has a front-back direction L and a width direction W that are orthogonal to each other. The front-rear direction L is defined by the direction extending to the front side of the body and the back side of the body. In other words, the front-back direction L is a direction extending in the front-back direction in the expanded absorbent article 10. Further, the absorbent article 10 has the thickness directions orthogonal to both the front-rear direction L and the width direction W.

The absorbent article 10 has a front waistline region S1, a back waistline region S2, and a crotch region S3. The front waistline region S1 is a region facing the front waistline (abdomen) of the wearer. The rear waistline region S2 is a region facing the rear waistline (back part) of the wearer. The crotch region S3 is a region located at the crotch of the wearer and arranged between the front waistline region S1 and the rear waistline region S2.

The absorbent article 10 may include an absorbent main body 40 and an exterior body 15. The exterior body 15 is arranged at least in the front waistline region S1 and the back waistline region S2 on the non-skin surface side T2 of the absorbent main body 40. The exterior body 15 overlaps the absorbent main body 40 in the thickness direction. The exterior body 15 may include a front exterior body 20 and a rear exterior body 30. The front exterior body 20 is arranged on the non-skin surface side T2 of the absorbent main body 40 in the front waistline region S1. The front exterior body 20 is arranged in a region that overlaps the absorbent main body 40 and a region that does not overlap the absorbent main body 40 in the front waistline region S1. The rear exterior body 30 is arranged on the non-skin surface side T2 of the absorbent body 40 in the rear waistline region S2. The rear exterior body 30 is a separate body from the front exterior body 20. Therefore, the rear exterior body 30 is separated from the front exterior body 20 in the front-rear direction L. The rear exterior body 30 is arranged in a region that overlaps the absorbent main body 40 and a region that does not overlap the absorbent main body 40 in the rear waistline region S2.

As shown in FIG. 3, the front exterior body 20 is located on the non-skin surface side T2 of the absorbent main body 40 and on the non-skin surface side T2 of the front first exterior sheet 25. The front second exterior sheet 26 and the exterior stretchable sheet 28 disposed between the front first exterior sheet 25 and the front second exterior sheet 26 may be included. Further, the front cover sheet 27 may be disposed on the skin surface side T1 of the front exterior body 20. The front cover sheet 27 may be arranged on the skin surface side T1 of the absorbent main body 40. In a region that does not overlap with the absorbent main body 40, the front cover sheet 27, the front first exterior sheet 25, the exterior stretch sheet 28, and the front second exterior sheet 26 are sequentially laminated from the skin surface side T1 toward the non-skin surface side T2. , Joined to each other. The front cover sheet 27, the front first exterior sheet 25, and the front second exterior sheet 26 may be formed of separate sheets, or may be formed of the same folded sheet.

As shown in FIG. 3, the rear exterior body 30 is located on the non-skin surface side T2 of the absorbent main body 40 and on the non-skin surface side T2 of the rear first exterior sheet 35. The rear second exterior sheet 36, and the rear side rubber thread 38 disposed between the rear first exterior sheet 35 and the rear second exterior sheet 36 may be included. In a region that does not overlap with the absorbent main body 40, the rear first exterior sheet 35, the rear thread rubber 38, and the rear second exterior sheet 36 are sequentially stacked from the skin surface side T1 toward the non-skin surface side T2 and are joined to each other. You can Further, the rear third exterior sheet 39 may be arranged on the skin side of the rear first exterior sheet 35. Further, a rear cover sheet 37 may be arranged on the skin surface side T1 of the rear exterior body 30. The rear cover sheet 37 may be arranged on the skin surface side T1 of the absorbent main body 40. In the area where the rear third exterior sheet 39 is arranged, the rear cover sheet 37, the rear third exterior sheet 39, the rear first exterior sheet 35, the rear thread rubber 38, and the rear second exterior sheet 36 are from the skin surface side T1. The layers may be sequentially stacked toward the non-skin surface side T2 and bonded to each other. The rear cover sheet 37, the rear first exterior sheet 35, the rear second exterior sheet 36, and the rear third exterior sheet 39 may be separate sheets, or may be the same folded sheet. May be The rear second exterior sheet 36 and the rear third exterior sheet 39 may be configured by the same sheet folded at the waistline opening 67.

The crotch region S3 is a region where leg openings 66 (see FIG. 1) described later are formed. The boundary on the crotch region side of the front waistline region S1 is the front end edge of the leg waist opening 66, and the boundary on the crotch region side of the rear waistline region S2 is the rear end edge of the leg waist opening 66. In another embodiment, the exterior body 15 may be provided with the front exterior body 20 and the rear exterior body 30 integrated and provided from the front waistline region S1 to the rear waistline region S2.

As shown in FIG. 1, a side joint portion 60 in which an end portion (side end portion) of the front waistline region S1 in the width direction W and an end portion (side end portion) of the rear waistline region S2 in the width direction W are joined. May be provided. The side joint portion 60 is defined by a portion in which an end portion of the front waistline region S1 in the width direction W and an end portion of the rear waistline region S2 in the width direction W are locked to each other.

The outer portion in the present invention is a portion that occupies a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is the outer edge in the width direction W. The inner portion in the present invention is a portion that occupies a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is the inner edge in the width direction W. Further, the front end portion and the rear end portion in the present invention are portions that occupy a certain range in the front-rear direction L including the edges in the front-rear direction L, and the front end edge and the rear end edge are edges in the front-rear direction L. The outer end portion includes a front end portion and a rear end portion, and the outer end edge includes a front end edge and a rear end edge.

As shown in FIG. 1, with the side joint 60 formed, the waistline opening 67 (waist opening) through which the wearer's torso is inserted and the wearer's legs are inserted into the absorbent article 10. And a pair of leg openings 66 are formed. The waistline opening 67 may be defined by the front edge S1F of the front waistline region S1 and the rear edge S2R of the rear waistline region S2.

Here, FIG. 2 shows a state in which the joining at the side joining portion 60 is released and the absorbent article 10 is expanded. The side joint portion 60 may extend along the front-rear direction L in each of the front exterior body 20 and the rear exterior body 30. In the pants-type absorbent article, the boundary between the front waistline region S1 and the crotch region S3 may be defined by the rear end edge of the side joint portion 60 provided on the front exterior body 20. Similarly, the boundary between the rear waistline region S2 and the crotch region S3 may be defined by the front end edge of the side joint portion 60 provided in the rear exterior body 30.

As shown in FIG. 3, an elastic member having elasticity in the width direction W is arranged in the front waistline region S1. The elastic member has one or more curved elastic members 22 that are curved forward from the center in the width direction W toward the outside in the width direction W. Therefore, the elastic member is composed of at least the curved elastic member 22. In the present embodiment, the elastic member has, as the curved elastic member 22, a front thread rubber that can expand and contract in the width direction W. In addition to the curved elastic member 22, the elastic member may be configured by an exterior stretchable sheet 28 that is capable of stretching in the width direction W. In addition to the curved elastic member 22, the elastic member may be configured by the front exterior body 20 itself configured by a stretchable sheet, for example.

The curved elastic member 22 is fixed to at least one of the front first exterior sheet 25, the front second exterior sheet 26, and the exterior stretch sheet 28 with a bonding agent (for example, an adhesive).

An elastic member having elasticity in the width direction W may be arranged in the rear waistline region S2. The elastic member may be configured by at least one of the rear thread rubber 38 that can expand and contract in the width direction W and the exterior elastic sheet that can expand and contract in the width direction W. Instead of this, the elastic member may be configured by the rear exterior body 30 itself configured by a stretchable sheet, for example.

The absorbent main body 40 is arranged across the front exterior body 20 and the rear exterior body 30. That is, the absorbent main body 40 extends over the front waistline region S1, the rear waistline region S2, and the crotch region S3. The absorbent main body 40 may be configured separately from the front exterior body 20 and the rear exterior body 30. In this case, the absorbent main body 40 may be joined to the front exterior body 20 and the rear exterior body 30 in the front waistline region S1 and the rear waistline region S2, respectively.

The absorbent body 40 includes at least an absorbent core 50. The absorbent core 50 may include, for example, ground pulp or super absorbent polymer (SAP), or a mixture thereof. The absorbent core 50 is arranged at least in the crotch region S3. Preferably, the absorbent core 50 may extend in the front-rear direction L from the front waistline region S1 to the rear waistline region S2. The absorbent core 50 may be covered by a core wrap. Further, as shown in FIG. 3, the absorbent main body 40 includes a skin surface sheet 42A located on the skin surface side of the absorbent core, and a liquid impermeable sheet 41 located on the non-skin surface side of the absorbent core 50, The main body sheet 42B arranged on the non-skin surface side T2 with respect to the liquid impermeable sheet 41 may be included. The liquid impermeable sheet 41 is a liquid impermeable sheet.

In the absorbent main body 40 of the present embodiment, in the region on the front side of the absorbent core, the skin surface sheet 42A, the liquid impermeable sheet 41, and the main body sheet 42B are arranged in this order from the skin surface side T1 to the non-skin surface side T2. It is located at. In the region overlapping with the absorbent core 50, the skin surface sheet 42A, the absorbent core 50, the liquid impermeable sheet 41, and the main body sheet 42B are arranged in this order from the skin surface side T1 to the non-skin surface side T2. .. The skin surface sheet 42A and the liquid impermeable sheet 41 may be arranged so as to sandwich the absorbent core 50 in the thickness direction T. The liquid-impermeable sheet 41 may be liquid-impermeable and may be formed of, for example, a film. The skin sheet 42A and the main body sheet 42B may be liquid-permeable and may be made of, for example, a nonwoven fabric. The liquid impermeable sheet 41 may cover at least the crotch region S3. The liquid impermeable sheet 41 may cover at least the absorbent core 50.

(3) Configuration of Bending Elastic Member 22 Next, the configuration of the bending elastic member 22 will be described in detail with reference to FIGS. 2 to 5. FIG. 4 is a diagram for explaining the abdomen of the wearer. FIG. 4A is a schematic view of the wearer's abdomen viewed from the front. FIG. 4B is a schematic view of the wearer's abdomen viewed from the side. In FIG. 4B, the right side is the front of the wearer and the left side is the back of the wearer. In FIG. 4, the hatched portion indicates the depression of the abdomen. The upper side of the depression of the abdomen corresponds to the bulge of the abdomen. The two dotted lines are generally the positions where the front end edge 20F and the rear end edge 20R of the front exterior body 20 are arranged. The line of the wearer's body is indicated by BL. The wearer's navel is indicated by O.

The absorbent article 10 has one or more curved elastic members 22. As shown in FIGS. 2 and 3, in the present embodiment, the absorbent article 10 has a plurality of curved elastic members 22 (221-228). The curved elastic members 221-228 are arranged at intervals in the width direction W from the front side to the rear side.

At least one of the one or more bending elastic members 22 is arranged in a region that does not overlap the absorbent core 50. In the present embodiment, the curved elastic members 221-225 are arranged in a region that does not overlap the absorbent core 50. The contracting force of the curved elastic members 221-225 not overlapping the absorbent core is not hindered by the highly rigid absorbent core 50. Therefore, since the contracting force of the curved elastic members 221-225 can be maintained, it is possible to fit the wearer's body while pulling up the front exterior body 20. By improving the fitting property, it is possible to prevent the front exterior body 20 from slipping down to the crotch side.

At least one of the one or more bending elastic members 22 may continuously extend in the width direction W so as to straddle the center of the width direction W. In the present embodiment, the curved elastic members 221-225 extend continuously in the width direction W. The curved elastic members 221-225 extend from one side end of the front waistline region S1 to the other side end thereof. Accordingly, the front elastic body 20 can be fitted to the body at the center of the abdomen of the wearer by the curved elastic member 22 continuously extending in the width direction W. Thereby, the fit of the front exterior body 20 can be improved. The center in the width direction W corresponds to the second center region FC2 described later.

All the curved elastic members 22 that continuously extend in the width direction W may be arranged in a region that does not overlap the absorbent core 50. As a result, the contracting force of all the curved elastic members 22 continuously extending in the width direction W can be maintained without being hindered by the absorbent core 50 having high rigidity. In addition, as compared with the case where the curved elastic member 22 does not continuously extend, a contracting force can be secured, so that the front exterior body 20 can be fitted to the body more.

At the center in the width direction W, the rear end edge of the curved elastic member 22 is arranged on the front side of the rear end edge 20R of the front exterior body 20. That is, all the curved elastic members 22 are arranged only in the region overlapping the front exterior body 20. Therefore, the bending elastic member 22 is arranged only in the front waistline region S1 and not in the crotch region S3. The rear end edge of the rear curving elastic member 22R, which is disposed on the rearmost side of the plurality of curving elastic members 22, is disposed on the front side of the rear end edge 20R of the front exterior body 20.

Here, as shown in FIG. 4, on the abdominal side of the wearer, generally, a recess (see a hatched portion) extending in the width direction is formed at the lower end of the abdomen. The recess at the lower end of the abdomen is curved forward from the center in the width direction W toward the outside in the width direction W. In the center in the width direction W, the recess at the lower end of the abdomen is generally located on the front side (waist opening side) of the rear edge 20R of the front exterior body 20.

Therefore, the rear end edge of the curved elastic member 22 is arranged on the front side of the rear end edge 20R of the front exterior body 20 at the center in the width direction W, so that the curved elastic member 22 moves from the center in the width direction to the width direction. It becomes easy to arrange along the recess toward the outside of the. Since the abdomen begins to bulge above the dent of the abdomen (on the waist opening side), the front exterior body 20 is pulled up to fit the bulge of the abdomen by contraction of the curved elastic member 22 that continuously extends in the width direction W. .. Thereby, the fit of the front exterior body 20 can be improved.

As shown in FIG. 3, at the center in the width direction W, the front edge 41F of the liquid impermeable sheet 41 may be located on the front side of the curved elastic member 22. At the center in the width direction W, the front end edge 41F of the liquid impermeable sheet 41 is disposed on the front side of the front end edge of the front curving elastic member 22F that is disposed on the frontmost side of the plurality of curving elastic members 22. As a result, the liquid impermeable sheet 41 comes into close contact with the wearer's body due to the contraction of the bending elastic member 22, so that excrement is less likely to move forward than the bending elastic member 22. As a result, the front leakage of excrement can be suppressed.

Further, since the curved elastic member 22 is easily arranged along the recess of the abdomen, when the front end edge 41F of the liquid impermeable sheet 41 is arranged on the front side of the front end edge of the front curved elastic member 22F, The liquid impermeable sheet 41 overlaps the bulge of the abdomen. Therefore, when the wearer is prone, the front edge 41F of the liquid impermeable sheet 41 is in close contact with the body due to the bulge of the abdomen. Thereby, when the wearer is prone, the front leakage of excrement can be suppressed.

Note that, outside the center in the width direction W, the front end edge 41F of the liquid impermeable sheet 41 may be arranged on the front side or the rear side of the front end edge of the front curving elastic member 22F.

The joining member may not be provided in a region of the absorbent main body 40 that overlaps the curved elastic member 22 in the thickness direction T. As a result, the rigidity of the absorbent main body 40 overlapping the bending elastic member 22 in the thickness direction T can be suppressed, and the contraction of the bending elastic member 22 is not hindered by the absorbent main body 40. Therefore, since it is possible to suppress the contraction force of the bending elastic member 22 in the width direction W, it is possible to fit the front exterior body 20 to the body.

The joining member may be a member that joins the members in the absorbent main body 40, or may be a member that joins the absorbent main body 40 and the front exterior body 20 (front first exterior sheet 25). It may be a member that joins the absorbent main body 40 and the front cover sheet 27.

Also, at the ends of the absorbent main body 40 in the front-rear direction L, the sheets forming the absorbent main body 40 do not have to be joined. As a result, the rigidity of the absorbent main body 40 is reduced, and thus it is possible to suppress reduction of the contracting force of the bending elastic member 22 in the width direction W. Therefore, the front exterior body 20 can be fitted to the body.

Also, at the side end of the front waistline region S1, the bending elastic member 22 may be arranged rearward of the range from the front edge of the side joint 60 to 20% of the entire front and rear direction of the side joint 60. At the side end of the front waistline region S1, generally, the recess at the lower end of the abdomen is located behind the range from the front edge of the side joint 60 to 20% of the entire front and rear direction of the side joint 60. .. Therefore, the curved elastic member 22 can be arranged in the recess at the lower end of the abdomen at the side end of the front waistline region S1. Thereby, the front exterior body 20 can be fitted to the body even at the side end portion of the front exterior body 20. The entire front-rear direction of the side joint portion 60 is a region from the front edge to the rear edge of the side joint portion 60.

Further, the elastic member may include an overlapping elastic member extending in the width direction W so as to overlap the absorbent core 50 in the thickness direction T. In the present embodiment, the curved elastic member 228 corresponds to the overlapping elastic member. The curved elastic member 228 does not extend to the center of the absorbent core 50 in the width direction W. By increasing the contracting force in the width direction W by the bending elastic member 228, the front exterior body 20 can be fitted to the body. Furthermore, since the curved elastic member 228 does not extend from one end to the other end of the absorbent core 50 in the width direction W, the absorbent core 50 can be suppressed from contracting in the width direction. Thereby, the absorption area can be secured.

The linear elastic member 23, which will be described later, may be an overlapping elastic member. The linear elastic member 23 may continuously extend from one side edge of the absorbent core 50 to the other side edge thereof, and the linear elastic member 23 is cut at the center of the absorbent core 50. It does not have to extend to the center of the absorbent core 50 in the width direction W.

(4) Modification Example Next, a modification example will be described based on FIGS. 5 to 7. FIG. 5 is a schematic plan view of the absorbent article 10 according to the first modification. FIG. 6 is a schematic plan view of the front exterior body 20 of the absorbent article 10 according to the second modification. FIG. 7: is a figure for demonstrating the absorbent article which concerns on the example 3 of a change, and the example 4 of a change. FIG. 7A is a diagram for explaining the positional relationship between the curved elastic member 22 and another member according to the third modification. FIG. 7B is a schematic plan view of the front exterior body 20 of the absorbent article 10 according to the fourth modification. 5 to 7 are diagrams in the expanded state. The description of the same parts as those in the above embodiment will be omitted.

Next, the first modification will be described. As shown in FIG. 5, the skin sheet 42A may include a top sheet 421 and a pair of side sheets 422 that cover both outer side portions of the top sheet 421. The inner portion of the side seat 422 may be folded back and overlapped. A leak-proof elastic member 62 extending in the front-rear direction L may be provided between the overlapping side seats 422. The leak-proof elastic member 62 expands and contracts in the front-rear direction L. The leak-proof elastic member 62 may be made of rubber thread that expands and contracts in the front-rear direction L. The side sheet 422 stands up on the skin surface side T1 due to the contraction of the leak-proof elastic member 62. Each of the pair of side sheets 422 constitutes the leak-proof gather 61. The leak-proof gather 61 has a contracting portion 63 that stands up due to the contraction of the leak-proof elastic member 62. The leak-proof gather 61 has a leak-proof base edge 64 that serves as a fulcrum of the contraction portion 63. The leakproof base edge 64 has a first leakproof base edge 641 and a second leakproof base edge 642.

The first leak-proof base edge 641 serves as an upright fulcrum of the contracted portion 63 outside the contracted portion 63 in the width direction W. The first leak-proof base end edge 641 is an inner edge of a region where the side sheet 422 and the surface sheet 421 are joined to each other on the outer side in the width direction than the contracting portion 63. The second leak-proof base edge 642 serves as an upright fulcrum of the contracted portion 63 on both outer sides in the front-rear direction L with respect to the contracted portion 63. The second leak-proof base edge 642 is an inner edge of a region where the side sheet 422 and the surface sheet 421 are joined to each other on both outer sides in the front-rear direction L with respect to the contracting portion 63.

The contraction portion 63 is a portion in which the side sheet 422 is not joined to the topsheet 421 and can be contracted by the leak-proof elastic member 62, and does not include a portion in which the non-expanded leak-proof elastic member 62 is arranged.

The curved elastic member 22 may be arranged on the front side of the front end edge 63F of the contracting portion 63. As a result, the front exterior body 20 is lifted by the contraction of the bending elastic member 22, and the occurrence of wrinkles due to the contraction of the contracting portion 63 in the front-rear direction L can be suppressed. As a result, a storage space for excrement can be secured.

Further, at least one of the curved elastic members 22 may be arranged so as to overlap the contracted portion 63 in the thickness direction T. As a result, due to the expansion and contraction of the curved elastic member 22, the leak-proof gather 61 spreads outward in the width direction and is easily lifted to the front side. As a result, it is possible to prevent the leak-proof gather 61 from falling inward in the width direction W and the leak-prevention gather 61 from being pulled too far inward in the front-rear direction L due to the contraction of the contracting portion 63. As a result, a storage space for excrement can be secured. Further, since the waistline and the recess of the leg are continuous, it is possible to make the region that contracts along the recess by the curved elastic member 22 and the contracting section 63 continuous, so that the wearer extends from the crotch region S3 to the front waistline region S1. The absorbent article 10 can be stably fitted to the body.

Next, the second modification will be described. As shown in FIG. 6, when the region from the center C of the front waistline region S1 in the width direction W to the side edge of the front waistline region S1 in the width direction is divided into three in the width direction W, the absorbent article 10 is It may have a first side region FS1, a first central region FC1, and a middle region FM. When the front waistline region S1 is divided in this way, the first side region FS1 is the region located on the outermost side in the width direction W, and the first central region FC1 is the region located on the innermost side in the width direction W. The intermediate region FM is a region located between the first side region FS1 and the first central region FC1 in the width direction.

When a plurality of bending elastic members 22 are arranged in the front-rear direction L, the plurality of bending elastic members 22 include a front bending elastic member 22F and a back bending elastic member 22R. As shown in FIG. 6, a curved elastic region ER, which is a region between the front curved elastic member 22F and the rear curved elastic member 22R in the front-rear direction L, may be provided.

The maximum length in the front-rear direction L11 in the first side region FS1 may be longer than the maximum length L13 in the front-rear direction L in the first central region FC1. Regarding the recess of the abdomen, the length in the front-rear direction L of the recess on the outer side in the width direction W is longer than the length of the recess in the center in the width direction W in the front-rear direction L (see FIG. 4 ). Therefore, the arrangement of the curved elastic member 22 in the front-rear direction L can be aligned with the recess of the abdomen, and the front exterior body 20 can be fitted more to the recess of the abdomen.

Further, in FIG. 6, the difference between the maximum length L12 and the minimum length L13 in the front-rear direction L of the bending elastic region ER in the intermediate region FM is the maximum length in the front-rear direction L of the bending elastic region ER in the first side region FS1. The difference between the length L11 and the minimum length L12 and the difference between the maximum length L12 and the minimum length L13 in the front-rear direction L of the bending elastic region ER in the first central region FC1 may be larger than each other. The difference between the maximum length and the minimum length in the front-rear direction L of the depression at the lower end of the abdomen is the largest in the intermediate region. Therefore, it is possible to arrange the curved elastic member 22 in the front-rear direction L so as to match the recess of the abdomen. The front exterior body 20 can be fitted more to the recess of the abdomen.

When the length L11 is 100, the length L12 is 90, the length L13 is 55, and the length L14 is 48.

In FIG. 6, the length in the front-rear direction of the frontmost front end edge and the rearmost rear end edge of the front bending elastic member 22F in the front-rear direction L is a length L21. The front-back front end edge and the rear-most rear end edge of the back curve elastic member 22R in the front-rear direction L have a length L22 in the front-rear direction. The length L22 may be shorter than the length L21.

The change in the front-back direction L on the lower side (rear side) of the dent at the lower end of the abdomen is smaller than the change in the front-back direction L on the upper side (front side) of the dent at the lower end of the abdomen (see FIG. 4). Therefore, it is possible to arrange the front bending elastic member 22F so as to be aligned with the upper end of the recess of the abdomen and the rear bending elastic member 22R so as to be aligned with the lower end of the recess of the abdomen, and the front exterior body 20 can be arranged in the recess of the abdomen. You can make it fit better.

In the first central region FC1, the front bending elastic member 22F may be arranged rearward of a range from the front end edge 60F of the side joint portion 60 to 60% of the entire front and rear direction of the side joint portion 60. In the first central region FC1, the recess at the lower end of the abdomen is located behind the range from the front end edge 60F of the side joint 60 to 60% of the entire front and rear direction of the side joint. Therefore, the arrangement of the curved elastic member 22 in the front-rear direction L can be aligned with the recess of the abdomen, and the front exterior body 20 can be fitted more to the recess of the abdomen.

In the first side region FS1, adjacent curved elastic members 22 may have equal intervals in the front-rear direction L. The elastic force of the bending elastic member 22 is likely to work uniformly in the front-rear direction L, and the rigidity of the bending elastic region ER can be made uniform. As a result, there is no portion where the rigidity of the curved elastic region ER is locally low, so that wrinkles and wrinkles hardly occur. As a result, the front exterior body 20 can be fitted in the surface to the recess at the lower end of the abdomen.

Note that the “equal spacing” may be substantially equal spacing, and specifically, the difference between the spacings in the front-rear direction L between the plurality of bending elastic members 22 may be 3 mm or less. In order to make the rigidity more uniform, the difference between the intervals may be preferably 1 mm or less.

The length in the front-rear direction L of the curved elastic region ER on the side joint 60 may be in the range of 35% to 65% with respect to the entire front-rear direction of the side joint 60. Since the depression of the lower end of the abdomen on the side joint portion 60 is generally in the range, the arrangement of the bending elastic member 22 in the front-rear direction L can be arranged in accordance with the depression of the abdomen, and the depression of the abdomen can be formed. The front exterior body 20 can be fitted more.

The length L14 of the curved elastic region ER on the center C in the width direction W of the front waistline region S1 in the front-rear direction L is in the range of 10% to 40% with respect to the entire front-rear direction of the side joint portion 60. Good. Since the depression of the lower end of the abdomen on the center C in the width direction W of the front waistline region S1 is generally within the range, the arrangement of the bending elastic member 22 in the front-rear direction L should be aligned with the depression of the abdomen. Therefore, the front exterior body 20 can be fitted more to the recess of the abdomen.

Also, in the first central region FC1, the maximum length L31 between the adjacent curved elastic members 22 may be 8 mm or more. In the first central region FC1, since the rigidity of the gap of the curved elastic member 22 corresponding to the maximum length L31 is low, it is easy to deform in accordance with the expansion and contraction of the wearer's skin with the gap as a base point. Therefore, the front exterior body 20 can be fitted more to the wearer's body.

As shown in FIG. 6, the maximum length L31 between the adjacent curved elastic members 22 in the first central region FC1 may be larger than the maximum length between the adjacent curved elastic members 22 in the first side region FS1. On the other hand, the minimum length between the adjacent curved elastic members 22 in the first central region FC1 may be smaller than the minimum length between the adjacent curved elastic members 22 in the first side region FS1. In order to have such a configuration, for example, two or more first bending elastic members 22A described later may be arranged so as to overlap each other in the first central region FC1 and not to overlap in the first side region FS1. Similarly, two or more second bending elastic members 22B, which will be described later, may be arranged so as to overlap each other in the first central region FC1 and not to overlap in the first side region FS1. Accordingly, it is possible to provide the region GR in which the interval between the adjacent curved elastic members 22 in the front-rear direction L is maximum. Since the region GR is a region where the rigidity is low, the region GR is likely to be deformed according to the expansion and contraction of the wearer's skin.

In FIG. 6, the change in the front-back direction L of the first bending elastic member 22 (front bending elastic member 22F) and the second bending elastic member 22 from the front side is large, and the front-back direction of the third bending elastic member 22 from the front side is large. The change in the direction L is small. Further, the change in the front-rear direction L of the fourth bending elastic member 22 from the front side is large, and the changes of the fifth and sixth bending elastic members 22 and the seventh bending elastic member 22 (rear bending elastic member 22R) from the front side are small. .. By arranging the plurality of bending elastic members 22 in this way, the fit of the front exterior body 20 can be improved in each of the first side region FS1 and the first central region FC1.

Further, as shown in FIG. 6, when the front waistline region S1 is divided into three in the width direction W, the absorbent article 10 may have a pair of second side regions FS2 and a second central region FC2. .. When the front waistline region S1 is divided in this way, the second side region FS2 is a region located on the outermost side in the width direction W, and the second central region FC2 is a region located on the innermost side in the width direction W. Is. The second central region FC2 is a region sandwiched by the second side regions FS2.

The contraction ratio of the bending elastic member 22 in the second side region FS2 is equal to or larger than the contraction ratio of the bending elastic member 22 in the second central region FC2. Since the contraction magnification of the curved elastic member 22 in the second central region FC2 is small, the absorbent core 50 is less likely to contract in the width direction W, and the absorbent area can be secured. In addition, it becomes difficult to tighten the center of the abdomen, and it becomes difficult for rubber marks to be attached to the center of the abdomen. Further, since the contraction magnification of the bending elastic member 22 in the second side region FS2 is large, the front exterior body 20 can be fitted more closely to the recess of the abdomen in the second side region, and the front waistline region S1 is provided on the outer side in the width direction. Can be prevented from leaking.

The contraction magnification of each of the curved elastic members 22 in the pair of second side regions FS2 may be the same. This makes it possible to prevent the one side from slipping to the crotch side by making the fitting properties uniform on both outer sides of the front waistline region S1 in the width direction W, and to prevent leakage on the outer side of the front waistline region S1 in the width direction W. Can be suppressed.

Note that the contraction ratio “same” means that the contraction ratio is substantially the same, and specifically, the contraction ratio difference is less than 0.2.

The plurality of bending elastic members 22 may include a first bending elastic member 22A and a second bending elastic member 22B. 22 A of 1st bending elastic members are the bending elastic members 22 arrange|positioned rather than the area|region GR which the space|interval in the front-back direction L of the adjacent bending elastic members 22 becomes the largest. The second bending elastic member 22B is the bending elastic member 22 arranged on the rear side of the region GR. In FIG. 6, a region GR is a region between the third bending elastic member 22 from the front side and the fourth bending elastic member 22 from the front side.

The first curved elastic members 22A extend so that the distance in the front-rear direction L becomes smaller in the first central region FC1. Therefore, the first bending elastic member 22A extends so as to converge in the front-rear direction L in the first central region FC1. Similarly, the second bending elastic members 22B extend so that the distance in the front-rear direction L in the first central region FC1 decreases. The second curved elastic member 22B extends in the first central region FC1 so as to converge in the front-rear direction L. However, the second bending elastic member 22B extends so as to converge on a portion different from the portion on which the first bending elastic member 22A converges. By not converging all the curved elastic members 22 in the same portion, it is possible to avoid providing a portion where the tightening is locally strong.

In the second central region FC2, the contraction ratio of the second bending elastic member 22B may be smaller than the contraction ratio of the first bending elastic member 22A. In the second central region FC2, the front exterior body 20 can be fitted into the recess of the abdomen by the first curved elastic member. Further, the second curving elastic member makes it possible to prevent the absorbent core 50 from shrinking while fitting the front exterior body 20 in the recess of the abdomen.

The shrinkage ratio of the curved elastic member 22 may be measured by a known method. For example, it can be measured by the following method. The actual curved length H1 of the bending elastic member 22 is measured in a state in which the absorbent article 10 is maximally stretched in the width direction W so that the wrinkles formed in the absorbent article 10 become invisible. Next, the curved elastic member 22 corresponding to the measured length H1 is cut along the dividing line. The member (the front first exterior sheet 25, the front second exterior sheet 26, and the exterior stretch sheet 28) that fixes the bending elastic member 22 by melting the bonding agent (adhesive) that fixes the bending elastic member 22. Etc.) and the curved elastic member 22 is separated. The separated curved elastic member 22 is sufficiently dried. The length HO of the dried curved elastic member 22 is measured. Then, the contraction ratio can be calculated by “contraction ratio=H1/H0”.

Next, the third modification will be described. As shown in FIG. 7A, the elastic member may include a linear elastic member 23 (231-233) that linearly extends in the width direction. The linear elastic member 231 may be arranged on the front side of the curved elastic member 22. When the curved elastic member 22 is arranged along the recess of the lower end of the abdomen, the linear elastic member 231 arranged on the front side (the waist opening side) of the curved elastic member 22 is arranged on the bulge of the abdomen. Thereby, the front exterior body 20 can be fitted to the body in the bulge of the abdomen.

The curved elastic member 22 is easily arranged along the recess at the lower end of the abdomen. Therefore, the linear elastic member 231 is likely to be arranged around the waist, which is the most stable of the bulges of the abdomen (that is, the abdominal girth size change is gentle). Therefore, the linear elastic member 231 does not easily slip off and can be fitted to the wearer's body.

Further, the linear elastic member 23 may be arranged on the rear side of the frontmost portion of the front end edge of the curved elastic member 22. Thereby, the linear elastic member 23 is easily pulled up by the curved elastic member 22. Therefore, in addition to the contraction of the curved elastic member 22, the contraction of the linear elastic member 232 allows the front external body 20 to be fitted to the body while pulling up the front external body 20. In addition, since the linear elastic member is arranged in a region that does not overlap the absorption core 50, the contraction force of the linear elastic member 232 can be maintained without being hindered by the absorption core 50 having high rigidity. it can.

Further, the linear elastic member 23 may be arranged on the front side of the front end edge 50F of the absorbent core 50. Accordingly, since the linear elastic member 23 is arranged in a region that does not overlap the absorbent core 50, the contracting force of the linear elastic member 23 can be maintained without being hindered by the highly rigid absorbent core 50.

Therefore, the linear elastic member 23 may be arranged in the range X between the rear side of the front end edge of the curved elastic member 22 and the front side of the front end edge 50F of the absorbent core 50.

The linear elastic member 23 (the linear elastic members 232, 233) may overlap at least one of the curved elastic members 22 in the thickness direction T. Since the curved elastic member 22 needs to be arranged while bending the elastic member, it is difficult to dispose the curved elastic member 22 and it is difficult to control the contracting force as compared with the linear elastic member 23. Therefore, the easily controllable linear elastic member 23 facilitates adjustment of the contraction force in the region where the curved elastic member 22 is arranged, and the front exterior body 20 can be appropriately fitted to the body.

The linear elastic member 23 (the linear elastic member 232) may be arranged between the center of the curved elastic member 22 in the front-rear direction L and the rearmost portion of the curved elastic member 22. As a result, the linear elastic member 23 is easily arranged in the recess of the abdomen or around the recess. Therefore, by pulling up the linear elastic member 23 to the curved elastic member 22, the front exterior body 20 can be fitted to the body along the bulge at the lower end of the abdomen.

Next, the fourth modification will be described. As shown in FIG. 7B, the linear elastic member 23 may be arranged so as to overlap the plurality of curved elastic members 22 in the thickness direction T. In FIG. 7B, two linear elastic members 23 are arranged. The contraction ratio of the second side region FS2 and the contraction ratio of the second center region FC2 may be controlled by the linear elastic member 23. The front exterior body 20 can be appropriately fitted to the body.

Note that the linear elastic member 23 is described by taking a rubber thread as an example, but may be, for example, an elastic sheet (exterior elastic sheet 28).

(5) Other Embodiments Although the present invention has been described in detail using the above-described embodiments, it should be understood by those skilled in the art that the present invention is not limited to the embodiments described in this specification. Is clear. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

In the above description, the curved elastic member 228 is described as an example of the overlapping elastic member that overlaps the absorbent core 50, but the overlapping elastic member 228 is not limited to this. The overlapping elastic member may be the linear elastic member 23.

In the above description, the curved elastic member 22 continuously extends in the width direction W so as to straddle the center of the width direction W, but the invention is not limited to this. The bending elastic member 22 may not extend continuously, that is, may extend in the width direction W discontinuously by being arranged so as to be curved, fixed and then cut. All the curved elastic members 22 may extend in the width direction W discontinuously. The curved elastic member 22 may extend discontinuously by cutting a portion at an arbitrary position. For example, the curved elastic member 22 may continuously extend in at least one of the first side region FS1, the first central region FC1, and the intermediate region FM. The bending elastic member 22 may extend discontinuously in at least one of the first side region FS1, the first central region FC1, and the intermediate region FM. In order to further enhance the effect of pulling up the front exterior body 20, the curved elastic member 22 preferably extends continuously in the intermediate region FM.

When a plurality of bending elastic members 22 are arranged, any bending elastic member 22 may extend continuously and the remaining bending elastic members 22 may extend discontinuously. Note that all the curved elastic members 22 may extend continuously.

In addition, in the center of the width direction W, when the rear end edge of the curved elastic member 22 is arrange|positioned rather than the rear end edge of the front exterior body 20, all the curved elastic members 22 overlap with the absorption core 50. It may be arranged in the area. When at least one of the one or more bending elastic members 22 is arranged in a region that does not overlap the absorbent core 50, the rear end edge of the bending elastic member 22 is located at the center in the width direction W. It may be arranged on the rear side of the rear edge of the front exterior body 20. By not increasing the rigidity of the absorbent core 50, the fit of the exterior body 15 in the front waistline region S1 can be improved.

In the above description, as shown in FIG. 2, all the curved elastic members 22 (226-228) arranged in the region overlapping with the absorbent core 50 may be arranged so as not to straddle the center in the width direction W. The curved elastic member 22 (221-225) not arranged in the region overlapping with the absorbent core 50 may continuously extend so as to straddle the center in the width direction W. Accordingly, the elasticity of the curved elastic member 22 does not increase the rigidity of the absorbent core 50, and the fit of the exterior body 15 in the front waistline region S1 can be improved.

Note that, as shown in FIG. 5, the curved elastic member 22 arranged in a region that does not overlap with the absorbent core 50 may be arranged so as not to straddle the center in the width direction W. For example, the curved elastic member 22 close to the absorbent core 50 extends discontinuously so as not to straddle the center in the width direction W, and the curved elastic member 22 far from the absorbent core 50 extends continuously. Good.

Note that the curved elastic member 22 separated from the absorbent core 50 may also extend discontinuously so as not to straddle the center in the width direction W. As a result, it is difficult to tighten the center of the abdomen, and it is difficult for rubber marks to be attached to the center of the abdomen.

In the above, the curved elastic member 22 may be colored. Thereby, a wearer and/or an assistant such as a mother can visually recognize the bending elastic member 22 so that the bending elastic member 22 is actually arranged along the recess of the abdomen. When the bending elastic member 22 is displaced from the recess of the abdomen, the assistant assists the wearer's body so as to follow the recess of the abdomen while visually checking the colored bending elastic member 22. The position of the body 20 or the absorbent article 10 itself may be adjusted. Thereby, the front exterior body 20 can be appropriately fitted to the body.

When a plurality of bending elastic members 22 are provided, all the bending elastic members 22 may be colored, some of the bending elastic members 22 may be colored, or one bending elastic member. 22 may be colored. When some of the curved elastic members 22 are colored, at least one of the curved elastic members 22 (first curved elastic members 22A) on the front side of the region GR is colored, and the curved elastic member on the rear side of the region GR is colored. 22 (the second bending elastic member 22B) may not be colored. Alternatively, the curved elastic member 22 on the front side of the region GR may not be colored, and at least one of the curved elastic members 22 on the rear side of the region GR may be colored. Alternatively, one of the curved elastic members 22 on the front side of the region GR may be colored and any of the curved elastic members 22 on the rear side of the region GR may be colored.

The color of the curved elastic member 22 may be any color that has a large color difference from the members forming the front exterior body 20, and may be, for example, blue. Accordingly, since the member forming the front exterior body 20 is usually white, the curved elastic member 22 can be easily identified. Since the non-colored color of the curved elastic member 22 is generally white, when the member forming the front exterior body 20 is white, the discrimination power is low and it is difficult for the wearer and the wearer to visually recognize it. ..

The color difference (ΔE) between the colored elastic member 22 and the surroundings of the curved elastic member 22 may be 2 or more. When the color difference ΔE is 2 or more, the wearer and the assistant can easily recognize the curved elastic member 22.

In addition, the color difference ΔE is measured in a CIE1976 (L*a*b*) color space specified in JIS Z 8729 by measuring the color of two points (two areas) to be measured using a commercially available colorimeter. It can be obtained by comparing the numerical values. Specifically, when the L* value difference between the two points to be measured is ΔL*, the a* difference is Δa*, and the b* value difference is Δb*, the color difference ΔE=[(ΔL*)2+ It is calculated by (Δa*)2+(Δb*)2]1/2.

It is possible to obtain an absorbent article that improves the fit of the exterior body in the front waistline region.

10: Absorbent article 15: Exterior body 20: Front exterior body 22: Curved elastic member 22A: First curved elastic member 22B: Second curved elastic member 22F: Front curved elastic member 22R: Back curved elastic member 23: Linear elastic member 25: front first exterior sheet 26: front second exterior sheet 27: front cover sheet 28: exterior stretch sheet 30: rear exterior body 35: rear first exterior sheet 36: rear second exterior sheet 37: rear cover sheet 38: Rear thread rubber 39: Rear third exterior sheet 40: Absorbent body 41: Liquid impermeable sheet 41F: Front edge 42A: Skin sheet 42B: Body sheet 50: Absorbent core 60: Side joint portion 61: Leak-prevention gather 62 : Leak-proof elastic member 63: Contraction part 64: Leak-proof base edge 66: Leg opening 67: Girth opening 421: Surface sheet 422: Side sheet 641: First leak-proof base edge 642: Second leak-proof Proximal edge ER: Curved elastic region FC1: First central region FC2: Second central region FM: Intermediate region FS1: First side region FS2: Second side region GR: Region S1: Front waist region S2: Rear waist region S3 : Inseam

Claims

A longitudinal direction, and a width direction orthogonal to the longitudinal direction,
A front waist region, a rear waist region, a crotch region arranged between the front waist region and the rear waist region,
An absorbent core,
An absorbent main body that includes the absorbent core, and is disposed over the front waistline region and the rear waistline region,
A front exterior body arranged on the non-skin surface side of the absorbent main body in the front waistline region,
A rear exterior body, which is disposed on the non-skin surface side of the absorbent main body in the rear waistline region, and is a separate body from the front exterior body,
An elastic member having stretchability in the width direction in the front waistline region,
The elastic member is an absorbent article having one or more curved elastic members that are curved forward from the center in the width direction toward the outside in the width direction,
The absorbent article in which the rear end edge of the curved elastic member is arranged on the front side of the rear end edge of the front exterior body at the center in the width direction.
The absorbent article according to claim 1, wherein at least one curved elastic member of the one or more curved elastic members is arranged in a region that does not overlap the absorbent core.
A longitudinal direction, and a width direction orthogonal to the longitudinal direction,
A front waist region, a rear waist region, a crotch region arranged between the front waist region and the rear waist region,
An absorbent core,
An absorbent main body that includes the absorbent core, and is disposed over the front waistline region and the rear waistline region,
On the non-skin surface side of the absorbent main body, at least the exterior body disposed in the front waistline region and the rear waistline region,
An elastic member having stretchability in the width direction in the front waistline region,
The elastic member is an absorbent article having one or more curved elastic members that are curved forward from the center in the width direction toward the outside in the width direction,
The absorbent article in which at least one curved elastic member among the one or more curved elastic members is arranged in a region that does not overlap with the absorbent core.
The exterior body is
A front exterior body arranged on the non-skin surface side of the absorbent main body in the front waistline region,
A rear exterior body that is arranged on the non-skin surface side of the absorbent main body in the rear waistline region, and is a separate body from the front exterior body,
The absorbent article according to claim 3, wherein a rear end edge of the curved elastic member is arranged on a front side of a rear end edge of the front exterior body at a center in the width direction.
The absorption according to any one of claims 1 to 4, wherein at least one of the one or more bending elastic members extends continuously in the width direction so as to straddle the center in the width direction. Sex goods.
A side joint portion is provided that joins a side end portion of the front waistline region and a side end portion of the rear waistline region,
At the side end portion of the front waistline region, the bending elastic member is arranged rearward of a range from the front end edge of the side joint portion to 20% of the entire front-rear direction of the side joint portion. The absorbent article according to any one of items 1 to 5.
The absorbent article according to any one of claims 1 to 6, wherein all the curved elastic members that extend continuously in the width direction are arranged in a region that does not overlap the absorbent core.
The elastic member has a linear elastic member that extends linearly along the width direction,
The absorbent article according to any one of claims 1 to 7, wherein the linear elastic member is arranged on a front side of the curved elastic member.
The elastic member has a linear elastic member that extends linearly along the width direction,
9. The linear elastic member is arranged rearward of a frontmost portion of a front end edge of the curved elastic member and frontward of a front end edge of the absorbent core. The absorbent article according to.
The absorbent article according to claim 9, wherein the linear elastic member overlaps at least one of the curved elastic members in the thickness direction.
The absorbent main body has a sheet having liquid impermeability,
The absorbent article according to any one of claims 1 to 10, wherein a front end edge of the sheet is located on the front side of the curving elastic member in the center in the width direction.
The absorbent article according to any one of claims 1 to 11, wherein a joining member is not provided in a region of the absorbent main body that overlaps the curved elastic member in the thickness direction.
With a skin sheet located on the skin side of the absorbent core,
The skin sheet has a top sheet, and a pair of side sheets that cover both outer side portions of the top sheet,
Each of the pair of side sheets constitutes a leak-proof gather having a contracting portion that stands up due to the contraction of the leak-proof elastic member extending in the front-rear direction,
The absorbent article according to any one of claims 1 to 12, wherein the curving elastic member is arranged on a front side of a front end edge of the contracting portion.
Having a skin sheet disposed on the skin side of the absorbent core,
The skin sheet has a top sheet, and a pair of side sheets that cover both outer side portions of the top sheet,
Each of the pair of side sheets constitutes a leak-proof gather having a contracting portion that stands up due to the contraction of the leak-proof elastic member extending in the front-rear direction,
The absorbent article according to any one of claims 1 to 12, wherein at least one of the one or more curved elastic members is arranged so as to overlap the contracted portion in the thickness direction.
The elastic member has an overlapping elastic member extending in the width direction so as to overlap with the absorption core in the thickness direction,
The absorbent article according to any one of claims 1 to 14, wherein the overlapping elastic member does not extend to a center of the absorbent core in the width direction.
A plurality of the curved elastic members are arranged in the front-rear direction,
The plurality of curved elastic members,
A front curving elastic member arranged on the most front side in the front-rear direction,
A rear curved elastic member arranged on the rearmost side in the front-rear direction,
A curved elastic region which is a region between the front curved elastic member and the rear curved elastic member in the front-rear direction,
When the region from the center of the front waistline region in the width direction to the side edge of the front waistline region in the width direction is divided into three in the width direction, a first side region located on the outermost side in the width direction. A first central region located on the innermost side in the width direction, and an intermediate region located between the first side region and the first central region in the width direction,
The absorbent article according to any one of claims 1 to 15, wherein a maximum length in the front-rear direction in the first side region is longer than a maximum length in the front-rear direction in the first central region.
The difference between the maximum length and the minimum length in the front-rear direction of the bending elastic region in the intermediate region is the difference between the maximum length and the minimum length in the front-rear direction of the bending elastic region in the first side region, and The absorbent article according to claim 16, wherein the difference is larger than the difference between the maximum length and the minimum length in the front-rear direction of the curved elastic region in one central region.
The length in the front-rear direction of the front-most front end edge and the rear-most rear end edge of the back-curved elastic member in the front-rear direction is the most front-side front end edge of the front-curved elastic member in the front-rear direction. The absorbent article according to claim 16 or 17, which is shorter than the length in the front-rear direction with the rear edge of the rear side.
19. In the first central region, the front curving elastic member is arranged rearward of a range from the front end edge of the side joint portion to 60% of the entire front and rear direction of the side joint portion. The absorbent article according to any one of 1.
A plurality of the curved elastic members are arranged in the front-rear direction,
The absorbent article according to any one of claims 16 to 19, wherein in the first side region, adjacent curved elastic members have equal intervals in the front-rear direction.
When the front waistline region is divided into three in the width direction, it has a pair of second side regions located on the outermost side in the width direction and a second central region located on the innermost side in the width direction,
The absorbent article according to any one of claims 1 to 20, wherein a contraction ratio of the bending elastic member in the second side region is equal to or larger than a contraction ratio of the bending elastic member in the second central region.
22. The absorbent article according to claim 21, wherein contraction ratios of the curved elastic members in the pair of second side regions are the same.
When the front waistline region is divided into three in the width direction, it has a pair of second side regions located on the outermost side in the width direction and a second central region located on the innermost side in the width direction,
A plurality of the curved elastic members are arranged in the front-rear direction,
The plurality of curved elastic members,
In the second central region, a first bending elastic member disposed on the front side of a region in which the distance between adjacent bending elastic members in the front-rear direction is maximum,
A second bending elastic member arranged on the rear side of the region,
23. The absorbent article according to claim 1, wherein a contraction ratio of the second bending elastic member is smaller than a contraction ratio of the first bending elastic member in the second central region.