WO2020065942A1

WO2020065942A1 - Absorbent article

Info

Publication number: WO2020065942A1
Application number: PCT/JP2018/036371
Authority: WO
Inventors: 工藤　悦子; 純子山下; 坂口　智
Original assignee: ユニ・チャーム株式会社
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2020-04-02

Abstract

Provided is an absorbent article that fits the waist of a wearer and tends to stay on the waist. In this absorbent article, a central region (FC) positioned at the center of a front waist region (S1) in the width direction is provided with a plurality of regions which are 10 regions equally divided along the whole length of the central region in the longitudinal direction. A high-shrinkage region which exerts the highest contractile force in the width direction among the plurality of regions is located within an intermediate region (F12) which is located behind the front edge (SIF) of the central region at a distance of 50-90% of the whole length of the central region in the longitudinal direction. The central region has a low-rigidity part (70) which serves as a start point of deformation of the central region in the longitudinal direction. At least a portion of the low-rigidity part is disposed in the width direction within the high-shrinkage region.

Description

Absorbent articles

The present invention relates to an absorbent article such as a disposable diaper.

吸収 Absorbent articles such as disposable diapers are worn to cover the abdomen and buttocks of the body. BACKGROUND ART Absorbent articles capable of improving the fit of a wearer's body, particularly the abdomen, are known (Patent Document 1 below). The absorbent article of Patent Literature 1 has a front waist region covering the abdomen, a rear waist region covering the buttocks, and an elastic member that expands and contracts in the width direction in the front waist region. The elastic member is curved toward the waist opening from the center in the width direction to the outside in the width direction.

JP 2006-43068 A

少なくとも At least a part of the elastic member described in Patent Document 1 is arranged so as to overlap the superior anterior iliac spine. The superior anterior iliac spine is located lateral to the body center. When the side in the width direction of the elastic member is arranged so as to overlap with the superior anterior iliac spine, the center in the width direction of the elastic member is arranged in the inflated part of the abdomen located at the center in the width direction of the body. You. In a wearer of a body with a swelling abdomen, such as an infant, when the elastic member is placed in the swelling of the abdomen, the elastic member moves to a concave portion of the body such as the lower end of the abdomen with contraction. As a result, when the elastic member is arranged at the lower end of the abdomen, the abdomen located above the elastic member cannot be covered, and the swelling of the abdomen may not be able to be continued.

Therefore, an absorbent article that fits the abdomen of the wearer and that easily covers the abdomen is desired.

The absorbent article according to one aspect has a longitudinal direction and a width direction orthogonal to each other, a front waist region, a rear waist region, and a crotch region arranged between the front waist region and the rear waist region. In the absorbent article, a central region located at the center in the width direction of the front waist region is provided with a plurality of regions obtained by equally dividing the entire length of the central region in the longitudinal direction into ten equal parts. The high shrinkage region having a high shrinkage force in the width direction in the region is arranged in an intermediate region located 50 to 90% behind the front end edge of the central region with respect to the entire length in the longitudinal direction of the central region, The intermediate region has a low-rigidity portion serving as a deformation origin in the longitudinal direction in the intermediate region, and at least a part of the low-rigidity portion is arranged along the width direction in the high-shrinkage region. .

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 along the AA cross section of the absorbent article shown in FIG. 2. FIG. 3 is a cross-sectional view of the absorbent article shown in FIG. 2 taken along the line BB. It is the figure which showed typically the mounting state of the absorbent article which concerns on embodiment. It is the figure which showed typically the mounting state of the absorbent article which concerns on embodiment. It is the table | surface which showed the measurement data of the contraction force and the rigidity of the 1st area | region-the 10th area | region of the absorbent article which concerns on embodiment. It is a figure for explaining a measuring instrument which measures rigidity.

(1) Outline of Embodiment At least the following matters will be apparent from the description of the present specification and the accompanying drawings.
The absorbent article according to one aspect has a longitudinal direction and a width direction orthogonal to each other, a front waist region, a rear waist region, and a crotch region arranged between the front waist region and the rear waist region. In the absorbent article, a central region located at the center in the width direction of the front waist region is provided with a plurality of regions obtained by equally dividing the entire length of the central region in the longitudinal direction into ten equal parts. The high shrinkage region having a high shrinkage force in the width direction in the region is arranged in an intermediate region located 50 to 90% behind the front end edge of the central region with respect to the entire length in the longitudinal direction of the central region, The intermediate region has a low-rigidity portion serving as a deformation origin in the longitudinal direction in the intermediate region, and at least a part of the low-rigidity portion is arranged along the width direction in the high-shrinkage region. .

The intermediate region is located 50 to 90% behind the front edge of the front waistline region with respect to the entire length in the longitudinal direction of the central region, and is arranged to face the recess at the lower end of the abdomen. The depression at the lower end of the abdomen is likely to cause the skin to expand and contract due to a change in the posture of the wearer. The low rigidity portion is provided in the intermediate region. Therefore, the intermediate region is deformed with the low rigidity portion as a base point, and the front waistline region easily follows the deformation of the body. Thereby, it can suppress that the whole front waist area shifts downward. The low rigidity portion is provided along the width direction in a high shrinkage region having a high shrinkage force. When the intermediate region is deformed with the low rigidity portion as the base point, the deformation base point can be fitted to the body by the high contraction region.

According to a preferred embodiment, the intermediate region is arranged so as to face a recess at the lower end of the abdomen of the wearer.

According to this aspect, a deformation base point is provided in the depression at the lower end of the abdomen, and the deformation base point is fitted to the body, and the bulging portion of the abdomen located above the depression at the lower end of the abdomen is located on the front side of the intermediate region. Easy to keep covered by area.

According to a preferred aspect, the plurality of regions include a low rigidity region having a low rigidity in the longitudinal direction, and the low rigidity region is 20% or more of the entire length of the front waistline region in the longitudinal direction.

According to this aspect, when the skin at the lower end of the abdomen expands and contracts, the force applied to the intermediate region is easily absorbed by the deformation of the low rigidity region. By absorbing the force applied to the intermediate region by the deformation of the low rigidity region, the region deformed by the movement of the body can be minimized, and the effect of continuously covering the abdomen can be more easily obtained.

According to a preferred aspect, the central region has a waist region located 0 to 50% rearward from a front edge of the front waistline region, and the waist region has a higher rigidity than the average rigidity of the plurality of regions. A high rigidity area is provided.

ため Since the high-rigidity area higher than the average rigidity is provided in the waist area, the high-rigidity area is suppressed from being deformed to shrink in the longitudinal direction, and the waist area is more likely to continue to cover the swelling of the abdomen.

According to a preferred aspect, the waist region has a constant rigidity region in which the rigidity in the longitudinal direction is uniform, and the longitudinal length of the constant rigidity region is 20% or more of the entire length of the waist region. is there.

According to this aspect, by having the constant rigidity region occupying 20% or more of the waist region in the longitudinal direction, a deformation origin along the width direction such as a wrinkle along the width direction due to a difference in rigidity occurs in the waist region. Can be suppressed. The length of the waist region in the longitudinal direction can be ensured, and the waist region can continue to cover the abdomen.

According to a preferred embodiment, the average rigidity of the intermediate region is lower than the average rigidity of the waist region. Since the average stiffness of the middle region is lower than the average stiffness of the waist region, the front waistline region is deformed from the middle region as a base point, and the front waistline region easily follows the deformation of the body. Thereby, it can suppress that the whole front waist area shifts downward.

According to a preferred aspect, the crotch region includes at least the absorbent core disposed in the crotch region and the front waist region, and wherein the central region is located 90 to 100% rearward from a front edge of the front waist region. And a front edge of the absorbent core is disposed in the crotch region.

According to this aspect, the crotch-side region is not easily deformed by the absorbent core, and it is easy to secure the length in the width direction. In this way, by securing the length in the width direction of the crotch region on the crotch region side in the front waist region, the absorbent core is applied to the body over a certain range in the width direction, and the body fluid absorbing function is achieved. Can be secured.

According to a preferred aspect, the central region has a waist region located 0 to 50% rearward from a front edge of the front waistline region, and the front waistline region has a stretchable nonwoven fabric that expands and contracts at least in the width direction. And a thread-like or band-like elastic member that expands and contracts in the width direction, wherein the elastic nonwoven fabric is disposed in the waist region and the intermediate region, and the elastic member is at least in the intermediate region. Are located.

According to this aspect, the waist region and the intermediate region are fitted to the body by the contraction of the stretchable nonwoven fabric, so that the entire front waist region can be prevented from shifting downward. In addition, the intermediate region can be more easily fitted into the recess at the lower end of the abdomen by the elastic member, and the entire front waist region can be suppressed from shifting downward. Therefore, the effect of continuing to cover the abdomen with the waist region is more easily obtained.

According to a preferred aspect, in the front waist region, a thread-like or band-like elastic member that expands and contracts in the width direction is provided, and the elastic member is located at a center of the elastic member in the width direction. It extends to the front side toward the outside in the width direction, and the center in the width direction of the elastic member is arranged in a region overlapping the intermediate region.

According to this aspect, the intermediate region fits more easily into the recess at the lower end of the abdomen by the elastic member, and functions more easily as a deformation base point in the longitudinal direction. Therefore, the front waistline region is deformed from the intermediate region as a base point, the front waistline region easily follows the deformation of the body, and it is possible to suppress the entire front waistline region from shifting downward. Therefore, the effect of continuing to cover the abdomen with the waist region is more easily obtained.

中間 Also, the intermediate region can be pulled up in the worn state by the elastic member. It is possible to prevent the entire front waist area including the intermediate area from being lowered, and to continue covering the abdomen with the waist area.

According to a preferred aspect, the central region has a waist region located 0 to 50% rearward from a front edge of the front waist region, and an average contraction force of the intermediate region is an average contraction force of the waist region. May be higher.

比較 Comparing the middle region and the waist region in the central region, the middle region is easier to fit on the body than the waist region. Therefore, the middle region is more easily fitted by the depression at the lower end of the abdomen. In addition, the width dimension of the intermediate region tends to be shorter than the width dimension of the waist region. Therefore, the front waistline region has a shape in which the intermediate region arranged in the concave portion at the lower end of the abdomen is more concave than the surrounding region. Since the front waist region has a shape along the dent of the body, the front waist region is more easily fitted to the body. The front waist region can be fitted along the body without bringing the front waist region into close contact with the body. Therefore, the wearing feeling can be improved. In addition, even when the weight of the absorbent article increases due to the absorption of body fluid, the absorbent article is unlikely to slip down.

According to a preferred embodiment, the waist region has an average contraction force of 10 to 50% of the average contraction force of the intermediate region.

(4) It is easier to obtain the effect of continuing to cover the swelling of the abdomen by the waist region while suppressing the shift of the entire front waist region by the deformation based on the intermediate region.

According to a preferred aspect, the central region has a crotch region located 90 to 100% behind the front edge of the front waist region, and the average contraction force of the crotch region is the average contraction force of the middle region. Lower than contractile force.

According to this aspect, since the crotch-side region has a lower contraction force than the middle region, the crotch-side region is less likely to shift toward the middle region. Therefore, it is possible to suppress the contraction force from being concentrated on the portion corresponding to the intermediate region. In addition, since the contraction force in the intermediate region located on the outside in the longitudinal direction is higher than the crotch region, a force for pulling upward acts, and the entire absorbent article is unlikely to slip down.

(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 dimensions are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, parts having different dimensional relationships and ratios between drawings may be included.

The absorbent article may be of a tape type or a pants type. The absorbent article may be a disposable diaper or a shorts type sanitary napkin. The absorbent article according to the first embodiment is a pants-type disposable diaper. FIG. 1 is a schematic front view of an absorbent article 10 according to the present embodiment. FIG. 2 is a schematic plan view of the absorbent article 10 according to the present embodiment. The schematic plan view shown in FIG. 2 shows an extended state in which the absorbent article 10 is extended to a state in which no wrinkles are formed in a state where a side joint 60 described later is developed. FIG. 3 is a sectional view taken along line AA shown in FIG. 2, and FIG. 4 is a sectional view taken along line BB shown in FIG.

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

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

では In the present embodiment, the absorbent article 10 may include the exterior body 15 and 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 waistline member 20 and a rear waistline member 30. The front waistline member 20 is an exterior body disposed on the non-skin facing surface side T2 of the absorbent main body 40 in the front waistline region S1. The rear waistline member 30 is an exterior body that is separated from the front waistline member 20 in the longitudinal direction L and is disposed on the non-skin-facing surface side T2 of the absorbent main body 40 in the rear waistline region S2.

As shown in FIG. 3, the exterior body 15 may have a cover sheet 27 arranged on the skin-facing surface side T1 of the absorbent main body 40. The cover sheet 27 may be provided on the skin-facing surface side T1 of the absorbent main body 40 in the front waistline region S1.

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

The front waistline member 20 and the rear waistline member 30 may be formed of a sheet such as a nonwoven fabric. The front waistline member 20 may have a plurality of exterior sheets. The exterior sheet may include a first exterior sheet 25 and a second exterior sheet 26 located on the non-skin-facing surface side T2 of the first exterior sheet 25. The cover sheet 27 may be composed of a sheet such as a nonwoven fabric. The cover sheet 27 may be formed by a portion in which at least one of the first exterior sheet 25 and the second exterior sheet 26 constituting the front waistline member 20 is folded back to the skin-facing surface side T1, or the first exterior sheet 25. And the second exterior sheet 26 may be constituted by separate sheets.

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

In the present invention, the outer portion is a portion occupying a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is an outer edge in the width direction W. The inner portion in the present invention is a portion occupying a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is an inner edge in the width direction W. Further, the front end and the rear end in the present invention are portions occupying a certain range in the longitudinal direction L including the edge in the longitudinal direction L, and the front end and the rear end are edges in the longitudinal direction L. The outer edge includes a front edge and a rear edge, and the outer edge includes a front edge and a rear edge.

As shown in FIG. 1, in a state where the side joints 60 are formed, the absorbent article 10 has a waist circumference opening 62 through which a wearer's torso is inserted, and a pair of wearable legs into which the wearer's legs are inserted. A leg opening 66 is formed. The waist opening 62 may be defined by a front edge S1F of the front waist area S1 and a rear edge S2R of the rear waist area S2.

Here, FIG. 2 shows a state where the bonding at the side bonding portion 60 is released and the absorbent article 10 is deployed. The side joint portion 60 may extend along the longitudinal direction L in each of the front waistline member 20 and the rear waistline member 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 edge of the side joint 60 provided on the front waistline member 20. Similarly, the boundary between the rear waistline region S2 and the crotch region S3 may be defined by the front edge of the side joint 60 provided on the rear waistline member 30.

伸縮 An elastic member 22 that can expand and contract in the width direction W may be formed in the front waistline region S1. The elastic member 22 may be made of, for example, a thread rubber that can expand and contract in the width direction W or an elastic sheet that can expand and contract in the width direction W. Instead of this, the elastic member 22 may be constituted by the front waist member 20 itself constituted by, for example, an elastic sheet. The elastic member 22 of the present embodiment is made of thread rubber.

The absorbent main body 40 is disposed over the front waistline member 20 and the rear waistline member 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 waistline member 20 and the rear waistline member 30. In this case, the absorbent main body 40 may be joined to the front waistline member 20 and the rear waistline member 30 in the front waistline region S1 and the rear waistline region S2, respectively.

The absorbent main body 40 includes at least the absorbent core 50. The absorbent core 50 may comprise, for example, ground pulp or superabsorbent 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 from the front waistline region S1 to the rear waistline region S2 in the longitudinal direction L. The absorbent core 50 may be covered by a core wrap. Further, as shown in FIGS. 3 and 4, the absorbent main body 40 includes a skin sheet 42 </ b> A located on the skin side of the absorbent core and a liquid impermeable sheet 41 located on the non-skin side of the absorbent core 50. And a main body sheet 42 </ b> B disposed closer to the non-skin facing surface side T <b> 2 than the liquid impermeable sheet 41.

The absorbent main body 40 of the present embodiment has a skin surface sheet 42A, a liquid impermeable sheet 41, and a main body sheet in a region on the front side of the absorption core 50 from the skin facing surface side T1 to the non-skin facing surface side T2. 42B. 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 facing surface side T1 to the non-skin facing surface side T2. ing. The skin sheet 42A and the liquid impermeable sheet 41 may be arranged with the absorbent core 50 interposed in the thickness direction T. The liquid impermeable sheet 41 only needs to be impermeable to liquid, and may be made of, for example, a film. The skin sheet 42A and the main body sheet 42B only need to be liquid-permeable, and may be made of, for example, a nonwoven fabric.

吸収 The absorbent article thus configured has a bonded region and a non-bonded region. The joining region was a region where the exterior body 15 and the absorbent main body 40 were joined, a region where the sheets of the absorbent main body 40 were joined together, a region where the exterior sheets were joined together, and the exterior sheet and the cover sheet were joined. Including the region. The non-joined area is an area where the exterior body 15 and the absorbent body 40 are not joined, an area where the sheets of the absorbent body 40 are not joined together, an area where the exterior sheets are not joined together, and the exterior sheet and the cover sheet. Include unjoined regions. Next, the joining region and the non-joining region of the absorbent article 10 will be described. In addition, the non-bonded area in the present invention includes not only the area where the adhesive is not applied but also the area where the adhesive is slightly applied but the members are not bonded to each other via the adhesive. .

The absorbent article 10 has a sheet non-joining area NS where the liquid impermeable sheet 41 and the main body sheet 42B are not joined and a sheet non joining area NS where the liquid impermeable sheet 41 and the skin sheet 42A are not joined. Good. At least a part of the sheet non-joining region NS may be provided in a region on the front side of the absorbent core. The absorbent article 10 may have a sheet joining area AS where the liquid impermeable sheet 41 and the main body sheet 42B are joined on the crotch area side of the sheet non-joining area NS. The sheet joining area AS is adjacent to the sheet non-joining area NS in the longitudinal direction. The sheet joining area AS is an area where sheets that are not joined in the sheet non-joining area NS are joined.

The absorbent article 10 may have a main body non-joining area NB where the absorbent main body 40 and the front waistline member 20 are not joined. The main body non-joining area NB may be an area of the sheet constituting the absorbent main body 40 where the sheet disposed so as to face the front waistline member 20 and the front waistline member 20 are not joined. The absorbent article 10 may have an overlapping area DR where the sheet non-joining area NS and the main body non-joining area NB overlap. The overlapping region DR is a region where the sheet non-joining region NS and the main body non-joining region NB overlap in the thickness direction T.

The absorbent article 10 may have the exterior non-joining area NE. The exterior non-joining area NE is an area of the first exterior sheet 25, the second exterior sheet 26, and the cover sheet 27 where the two sheets are not joined. An exterior joining region AE in which exterior sheets are joined may be provided in front of the exterior non-joining region NE. The exterior joining region AE may include a region where the cover sheet 27 is joined to the exterior sheet, and a region where the exterior sheets are joined to each other. The exterior joint region AE tends to have higher rigidity than the exterior non-join region NE.

The absorbent article 10 may have a cover non-bonding area NC where the absorbent main body 40 and the cover sheet 27 are not bonded, and a cover bonding area AC where the absorbent main body 40 and the cover sheet 27 are bonded. The cover non-joining area NC may be an area where the sheet arranged opposite to the cover sheet 27 and the cover sheet 27 among the sheets forming the absorbent main body 40 are not joined. The cover joining area AC may be an area where the sheet arranged opposite to the cover sheet 27 and the cover sheet 27 among the sheets constituting the absorbent main body 40 are joined. The cover non-joining area NC has a lower rigidity than the area where the cover sheet 27 and the absorbent main body 40 are joined, and is an area that is easily deformed.

As shown in FIG. 2, the front waistline region S1 may include a central region FC located at the center in the width direction W, and a side region FS located outside the central region FC in the width direction W. The outer edge of the central area FC coincides with the inner edge of the side area FS. The outer edge of the side region FS may be the inner edge of the side joint portion 60 in a pants-type absorbent article, or the outer edge of the front waist region S1 in a tape-type absorbent article. May be.

中央 The central area FC and the side area FS of the present invention can be defined by the following method. First, when the absorbent article 10 has the side joint 60, the side joint 60 is released, and the absorbent article 10 is deployed. Next, the absorbent article is stretched to a stretched state. The extended state is a state in which wrinkles due to contraction or the like of the elastic member are not formed. In the extended state, the length in the width direction of the front waistline region S1 is measured. Next, the front waistline region S1 is extended to a constant width. The fixed width of the front waistline region S1 is 60% of the length in the width direction of the front waistline region S1 in the extended state. In the front waist region having a constant width, a region including the center in the width direction and having a length of 55% in the width direction is defined as a central region FC, and a region between the central region FC and the outer edge of the front waist region is a side region. FS. The length in the width direction of the side region FS is 22.5% of the fixed width.

中央 In the central region FC located at the center of the front waistline region S1 in the width direction W, a plurality of regions indicated by a ratio to the total length in the longitudinal direction of the front waistline region S1 may be provided. The central region FC includes a waist region F11 located 0 to 50% behind the front edge S1F of the front waistline region S1, an intermediate region F12 located 50 to 90% behind the front edge S1F of the front waistline region S1, and a front region. And a crotch region F13 located 90 to 100% behind the front edge S1F of the waistline region S1. Each region in the present embodiment is defined by the ratio of the length of the absorbent article in the stretched state.

Each area is constituted by a plurality of areas obtained by equally dividing the total length in the longitudinal direction of the central area FC into ten equal parts. Specifically, the first region of the front waistline region S1 from the front edge S1F to 10% behind, the second region from 10% to 20% behind, the third region from 20% to 30% behind, and 30% to Fourth region up to 40% behind, fifth region from 40% to 50% behind, sixth region from 50% to 60% behind, seventh region from 60% to 70% behind, 70% to 80% It has an eighth region to the rear, a ninth region from 80% to 90% behind, and a tenth region from 90% to 100% behind. The first to fifth regions constitute a waist region F11, the sixth to ninth regions constitute an intermediate region F12, and the tenth region constitutes a crotch side region F13.

FIGS. 5 and 6 are diagrams schematically showing a state in which the absorbent article is worn by a wearer. FIG. 5 shows the abdominal mounting state in a sitting state, and FIG. 6 shows the side mounting state in a standing state. 5 and 6, the line of the wearer's body is indicated by a dashed line BL.

As shown in FIGS. 5 and 6, a recess extending in the width direction W is generally formed at the lower end of the abdomen on the abdomen side of the wearer. The recess at the lower end of the abdomen is curved upward from the center in the width direction W toward the outside in the width direction W, and is easily formed particularly in babies and infants. As a result of intensive studies by the present applicant, it has been found that the recess at the lower end of the abdomen is arranged in the central area FC so as to face the intermediate area F12.

The absorbent article 10 may be designed to have a suitable contraction force for each region of the front waistline region S1, and the first to tenth regions may have different contraction forces in the width direction W. Further, the absorbent article 10 may be designed to have a rigidity suitable for each region of the front waistline region S1, and the first region to the tenth region may have different rigidities in the longitudinal direction L. It is configured so as to fit the wearer's abdomen and easily cover the abdomen by lowering the longitudinal rigidity of the region facing the easily deformable part of the abdomen and increasing the contraction force of the region. I have.

FIG. 7 shows measurement data of the contraction force and the rigidity of the first to tenth regions of the absorbent article according to the embodiment.
In the present embodiment, the “contraction force” of each region is measured by the following method. First, when measuring the contraction force of each area, a test piece to be measured is prepared. When the absorbent article 10 has the side joints 60, the side joints 60 are released, and the absorbent article 10 is deployed. Next, the length in the width direction W and the length in the longitudinal direction L are measured in the stretched state in which the absorbent article 10 is stretched, and a line is drawn at the boundary between the central area FC and the side area FS. Next, ten test pieces obtained by dividing the front waist area S1 into ten pieces in the longitudinal direction L are cut out, and each test piece is cut at the boundary between the central area FC and the side area FS. Next, both ends of the cut test piece are clamped by a chuck (clamping tool) of a tensile tester. At this time, when measuring the contraction force of the central area FC, the distance between the chucks is set to 50 mm.

Next, with one of the chucks fixed in the width direction W, the other of the chucks is moved so as to change the distance between the chucks. The moving speed of the chuck at this time is 300 mm / min. During the movement of the chuck, the stress on the chuck is measured, and the stress (N) obtained in a state of 60% (constant width) from the expanded state is defined as “contraction force”. In this manner, a contraction force in the width direction from the first region to the tenth region can be obtained.

において In the present embodiment, the “rigidity in the longitudinal direction” of each region is measured by the following method. FIG. 8 is a diagram for explaining a measuring instrument for measuring rigidity. The rigidity is measured using a digital force gauge 200 gf (2N) (manufactured by SHIMPO, model number: FGP-0.2) 101 and a force gauge stand (manufactured by SHIMPO, model number: GS-50X-H) 102. First, a test piece for measurement is prepared. When the absorbent article 10 has the side joints 60, the side joints 60 are released, and the absorbent article 10 is deployed. Next, the length is measured in the stretched state in which the absorbent article is stretched, and a mark is made so as to divide the length of the side joint 60 in the longitudinal direction into ten equal parts. Next, the absorbent article is left for 60 minutes in an atmosphere of 20 ° C. ± 2 ° C. and a relative humidity of 60% ± 5% RH, and the length in the width direction W of the front waistline area S1 is measured. This length is defined as the length in the width direction of the front waistline region S1 in the natural state.

Next, the rigidity in the longitudinal direction L from the first region to the tenth region is measured. The front waistline area S1 is extended to a constant width. The fixed width of the front waistline region S1 is 60% of the length in the width direction of the front waistline region S1 in the extended state. A front waist area S1 serving as a test piece is attached on the acrylic plate 103 for attaching the force gauge stand 102. As shown in FIG. 8B, the

acrylic plates

103 and 104 are concave in a U-shape. The width of the U-shaped concave portion is 115 mm. FIG. 8C shows a state where the test piece X is set on the acrylic plate 103. At this time, the front edge S1F of the front waist region S1 of the absorbent article 10 faces the digital force gauge 101, and the mark (the foremost front edge) located 10% behind the front edge S1F of the front waist region S1 of the absorbent article 10. The absorbent article 10 is arranged so that the portion up to the front edge of the waist area projects toward the digital force gauge 101 from the end of the U-shaped recess of the acrylic plate 103. At this time, the test piece is arranged so that the center in the width direction of the distal end 106 of the digital force gauge 101 faces the center in the width direction of the first region. An acrylic plate 104 having a thickness of 2 mm is placed on the acrylic plate 104, and a 3.5 kg weight 105 is placed on the acrylic plate 104. With the first region protruding from the

acrylic plates

103 and 104, the distal end 106 of the digital force gauge 101 is placed as close as possible to the absorbent article so that no load is applied to the digital force gauge 101. The size of the tip 106 of the digital force gauge 101 is 10 mm × 30 mm. The first region of the front waistline region S1 is pressed by the distal end 106 of the digital force gauge 101. The condition at the time of pressing is 5 mm at 100 mm / min, and the data capturing interval is 10 times / Sec. In this state, using a digital force gauge, the rigidity of a region from the front edge of the front waist region of the absorbent article to the mark located 10% behind is measured. One measurement is made, and the value is used as the stiffness value of the area. In this way, the stiffness of the first region located in the central region FC of the front waistline region S1 is measured. Then, in order to measure the stiffness of the next area, the area from the front edge of the front waist area of the absorbent article to the mark located 10% behind is cut. By the same process, the rigidity of the area from the mark located 10% behind the front edge of the front waist area of the absorbent article to the mark located 20% behind is measured. This measurement is repeated 10 times, and the stiffness (N) of a region obtained by equally dividing the entire length of the front waist region into ten in the longitudinal direction is measured.

The central region FC has a high contraction region having a high contraction force in the width direction among the first to tenth regions. As shown in the table of FIG. 7, the high shrinkage region may be located in the middle region F12. The high contraction region is a region having a contraction force higher than the average contraction force of the first to tenth regions of the central region FC. The average contraction force of the central region FC of the present embodiment is 0.119 N, and the high contraction region is constituted by the seventh to ninth regions. Generally, the intermediate region F12 is arranged to face the lower end of the wearer's abdomen. Since the high shrinkage region is located in the intermediate region F12, the high shrinkage region fits into the recess at the lower end of the abdomen, and the absorbent article is less likely to shift in the longitudinal direction, and the shift of the absorbent article 10 can be further suppressed. The high shrinkage region only needs to be provided in at least a part of the intermediate region F12.

The high shrinkage region is preferably located only in the middle region F12 and not located in the waist region F11. The waist region F11 is a portion above the lower end of the abdomen, and is arranged in a portion where the size around the waist is longer than the middle region F12. Since the high shrinkage region is located only in the region corresponding to the depression at the lower end of the abdomen, the movement of the waist region F11 toward the middle region F12 can be suppressed. Therefore, the shift to the whole front waist region S1 can be suppressed, and the abdomen can be continuously covered by the waist region F11. An elastic member 22 that expands and contracts in the width direction may be provided in the high shrinkage region.

凹 Furthermore, the depression at the lower end of the abdomen tends to cause the skin to expand and contract due to a change in the posture of the wearer. The intermediate region F12 is arranged so as to face the recess at the lower end of the abdomen, and easily receives a force deforming in the longitudinal direction L due to a change in the posture of the wearer. The intermediate region F12 is provided with a low-rigidity portion 70 serving as a deformation base point in the longitudinal direction L in the intermediate region F12. At least a part of the low rigidity portion 70 is arranged along the width direction W in the high shrinkage region. Therefore, the intermediate region F12 is deformed with the low rigidity portion 70 extending in the width direction as a base point, and the front waistline region S1 easily follows the deformation of the body. This can suppress the entire front waistline region S1 from shifting downward. The low rigidity portion 70 is provided along the width direction in the high shrinkage region. When the intermediate region F12 is deformed with the low rigidity portion 70 as a base point, the deformation base point can be fitted to the body by the high contraction region.

The low rigidity portion 70 is a region that is more easily deformed in the longitudinal direction L than the surroundings in the intermediate region F12. Specifically, the low stiffness portion 70 is a low weighing portion having a lower weighing than the surrounding absorbent core 50, a low joining portion having a lower basis weight of the adhesive than the surroundings, and members constituting the absorbent article are joined together. It may be a region provided with at least one of a non-existent region and a fragile portion in which a member constituting the absorbent article is cut or broken.

As shown in FIG. 3, the low-rigidity portion 70 of the present embodiment is configured by a region where members constituting the absorbent article 10 are not joined. Specifically, it may be configured by an overlapping area DR where the sheet non-joining area NS and the main body non-joining area NB overlap. Further, the low-rigidity portion may be constituted by the exterior non-joining area NE. The rigidity of the region where the sheets are not joined is lower than the region where the sheets are joined. In addition, the low rigidity part 70 may be constituted by the cover non-joining area NC. Preferably, as shown in FIGS. 3 and 4, the low-rigidity portion 70 includes a first non-joining region N11 in which the cover non-joining region NC, the sheet non-joining region NS, and the main body non-joining region NB overlap, And a second non-joining region N12 where the exterior non-joining region NE overlaps. The first non-joining region N11 and the second non-joining region N12 are adjacent to each other in the longitudinal direction, and may form an integrated low-rigidity portion.

The low-rigidity portion 70 may have a portion extending in the width direction W in a region overlapping the high shrinkage region. The low rigidity portion 70 may also include a portion extending in the longitudinal direction L in a region overlapping the high shrinkage region. The configuration extending in the width direction W includes not only a configuration parallel to the width direction W but also a configuration along a line whose angle with respect to the width direction W is 45 degrees or less.

中間 As shown in the table of FIG. 7, the intermediate region F12 may have a low rigidity region having a low rigidity in the longitudinal direction L. The low rigidity region includes a region having the lowest rigidity in the longitudinal direction among the sixth to ninth regions constituting the intermediate region F12. The low-rigidity region defines a region having the lowest rigidity in the intermediate region F12 as a low-rigidity region. In addition, a region adjacent to the low rigidity region and lower than the average rigidity of the intermediate region F12 is also defined as a low rigidity region. Specifically, the average rigidity of the intermediate region F12 is 0.575N. The region having the lowest rigidity in the intermediate region F12 of the present embodiment is the sixth region. The seventh region is adjacent to the sixth region, which is a low-rigidity region, and is lower than the average rigidity of the intermediate region F12, and thus constitutes a low-rigidity region. Since the fifth region and the eighth region are not lower than the average rigidity of the intermediate region F12, they do not constitute low rigidity regions. Therefore, the low rigidity region according to the present embodiment is constituted by the sixth region and the seventh region. That is, the low rigidity region only needs to be at least partially provided in the intermediate region F12, and may extend over the intermediate region F12 and the waist region F11. It is preferable that the low-rigidity region is provided with the low-rigidity portion 70. In the present embodiment, a region where the members constituting the absorbent article are not joined to each other is provided.

The low rigidity region may be 20% or more of the entire length of the front waistline region S1 in the longitudinal direction L in the extended state. The front waistline region S1 is easily deformed in the longitudinal direction L due to expansion and contraction of the skin. Since the low rigidity region has a length of 20% or more of the entire length of the front waistline region S1 in the longitudinal direction L, when the skin at the lower end of the abdomen expands and contracts, the force applied to the intermediate region F12 is reduced to the low rigidity region. Easy to absorb by deformation. Thereby, the force applied to the intermediate region F12 is absorbed by the deformation of the low rigidity region, and the region deformed by the movement of the body can be minimized. Further, in order to easily cover the entire abdomen with the front waist region S1, the length of the low rigidity region in the longitudinal direction L may be 40% or less of the entire length of the front waist region S1 in the longitudinal direction L.

ウエスト As shown in the table of FIG. 7, the waist region F11 may be provided with a high rigidity region higher than the average rigidity of the plurality of regions. The region suppresses the deformation that shrinks in the longitudinal direction L, and the waist region F11 can more easily cover the swelling of the abdomen. The average stiffness of the plurality of regions is an average value of the stiffness in the longitudinal direction of the first region to the tenth region. Preferably, the rigidity in the longitudinal direction of all the regions constituting the waist region F11 may be higher than the average rigidity. It becomes easier to continue covering the swelling of the abdomen with the entire waist region F11. Further, the high rigidity region may extend over a plurality of regions connected in the longitudinal direction. Since the high-rigidity region is provided in the waist region F11 over a plurality of regions, deformation of the high-rigidity region contracting in the longitudinal direction L is suppressed, and the waist region F11 can more easily cover the swelling of the abdomen. The average rigidity of the plurality of regions according to the present embodiment is 0.704 N, and the high rigidity region includes the third region to the fifth region. The exterior joining area AE is provided in the high rigidity area.

ウエスト As shown in the table of FIG. 7, the waist region F11 may have a constant rigidity region having a uniform rigidity in the longitudinal direction L. The length of the constant rigid region in the longitudinal direction L may be 20% or more of the entire length in the longitudinal direction L of the waist region F11. By having a constant rigidity region occupying 20% or more of the waist region F11 in the longitudinal direction L, a deformation origin along the width direction W such as a wrinkle along the width direction W due to a difference in rigidity occurs in the waist region F11. Can be suppressed. The waist region F11 is unlikely to be deformed so as to shrink in the longitudinal direction L, and the length of the waist region F11 in the longitudinal direction L is secured, so that the waist region F11 can continue to cover the abdomen.

The “constant stiffness region” can be defined based on the stiffness measured by the stiffness measuring method described above. The average stiffness, which is the average value of the stiffness of the five regions included in the waist region F11 located 0 to 50% behind the front edge of the front waist region, is calculated. Regions within a range of 15% error with respect to the average rigidity and adjacent to each other are defined as constant rigidity regions. The average stiffness of the waist region F11 of the present embodiment is 0.716N. The rigidity values of the first to fifth regions are all within a range of 15% error with respect to the average rigidity, and the rigidity values of the sixth region are outside the range of 15% error with respect to the average rigidity. Therefore, the constant rigidity region of the present embodiment is constituted by the first to fifth regions.

平均 The average rigidity of the middle region F12 may be lower than the average rigidity of the waist region F11. Since the average stiffness of the middle region F12 is lower than the average stiffness of the waist region F11, the front waistline region S1 is deformed with the middle region F12 as a base point, and the front waistline region S1 easily follows the deformation of the body. This can suppress the entire front waistline region S1 from shifting downward. The waist region F11 has a higher average rigidity than the intermediate region F12, and is less likely to buckle in the longitudinal direction L. When the waist region F11 is deformed in the longitudinal direction L, the length of the waist region F11 in the longitudinal direction L is shortened, and it is difficult to continuously cover the bulge of the abdomen. However, since the waist region F11 is unlikely to buckle in the longitudinal direction L, the size of the waist region in the longitudinal direction is ensured, and it is easy to continue to cover the swelling of the abdomen. Therefore, according to the absorbent article of this aspect, it is possible to fit the wearer's abdomen and keep covering the abdomen. Since the high contraction region is arranged in the intermediate region F12 and the average rigidity of the intermediate region F12 is low, when the intermediate region F12 is deformed with the high contraction region as a base point, the deformed base point can be fitted to the body. Since the deformation base point is provided for the dent of the body and the deformation base point fits the dent, the displacement of the front waistline region S1 in the longitudinal direction L can be suppressed.

Average stiffness is the average of the stiffness in the longitudinal direction, and can be calculated based on the stiffness measured by the stiffness measuring method described above. The average value of the stiffness of the five regions included in the waist region F11 located 0 to 50% behind the front edge of the front waist region and the intermediate region F12 located 50 to 90% behind the front edge of the front waist region The average value of the rigidity of the four included regions is calculated. The average stiffness of the intermediate region F12 of the present embodiment is 0.575N, and the average stiffness of the waist region F11 is 0.716N.

高 As shown in FIG. 3, a high-rigidity portion 80 may be provided in the waist region F11. A plurality of high rigidity parts 80 may be arranged at intervals in the width direction W and may extend in the longitudinal direction L. The high-rigidity portion 80 has a difference in rigidity with respect to a region adjacent in the width direction W, and extends in the longitudinal direction L. In the waist region F11, wrinkles extending in the longitudinal direction L are easily formed, and wrinkles extending in the width direction W are not easily formed. Therefore, the waist region F11 is suppressed from being deformed to shrink in the longitudinal direction L, and the waist region F11 is more likely to continue to cover the swelling of the abdomen. The high-rigidity part can be constituted by at least one of a compressed part formed on a constituent member of the absorbent article and a joint part that joins the constituent members. Further, the high-rigidity portion 80 may be constituted by a portion having a large number of constituent members constituting the absorbent article. The high-rigidity portion according to the present embodiment is configured by the exterior bonding region AE. The adhesive for joining the exterior sheets extends in the longitudinal direction and is arranged at intervals in the width direction. Therefore, the exterior joining regions AE extend in the longitudinal direction and are arranged at intervals in the width direction.

平均 The average contraction force of the middle region F12 may be higher than the average contraction force of the waist region F11. The intermediate region F12 has a high contraction force in the width direction W, and easily fits into the recess at the lower end of the abdomen. The waist region F11 is a portion above the lower end of the abdomen, and is arranged in a portion where the size around the waist is longer than the middle region F12. If the contraction force of the waist region F11 is high, the waist region F11 may shift toward the intermediate region F12, and the entire front waist region S1 may shift downward. However, the waist region F11 has a lower contraction force than the middle region F12, and is less likely to move toward the middle region F12. Therefore, the shift to the whole front waist region S1 can be suppressed, and the abdomen can be continuously covered by the waist region F11.

凹 Furthermore, the depression at the lower end of the abdomen tends to cause the skin to expand and contract due to a change in the posture of the wearer. The intermediate region F12 is arranged so as to face the recess at the lower end of the abdomen, and easily receives a force deforming in the longitudinal direction L due to a change in the posture of the wearer. The rigidity of the intermediate region F12 in the longitudinal direction L is lower than the rigidity of the waist region F11. Therefore, when the skin at the lower end of the abdomen expands and contracts, the front waistline region S1 is deformed based on the low rigidity portion of the intermediate region F12, and the front waistline region S1 easily follows the deformation of the body. Thus, when the skin at the lower end of the abdomen expands and contracts, it is possible to suppress the entire front waistline region S1 from shifting downward.

Preferably, the average contraction force of the waist region F11 may be 10 to 50% of the average contraction force of the intermediate region F12. The average contraction force of the waist region F11 of the present embodiment is 0.067N, and the average contraction force of the intermediate region F12 is 0.213N. The average contraction force of the waist region F11 is 31.5% of the average contraction force of the middle region F12. Since the average contraction force of the waist region F11 and the average contraction force of the middle region F12 have a difference of more than twice, both the fit to the lower end of the abdomen in the middle region F12 and the effect of continuously covering the swelling of the abdomen in the waist region F11 are achieved. Easy to do. The intermediate region F12 arranged in the recess at the lower end of the abdomen has a shape that is more concave than the waist region F11. Since the front waist region has a shape along the dent of the body, the front waist region is more easily fitted to the body. The front waist region can be fitted along the body without bringing the front waist region into close contact with the body. Therefore, the wearing feeling can be improved. In addition, even when the weight of the absorbent article increases due to the absorption of body fluid, the absorbent article is unlikely to slip down.

平均 The average contraction force of the crotch side region F13 may be lower than the average contraction force of the middle region F12. Since the crotch-side region F13 has a lower average contraction force than the middle region F12, the crotch-side region F13 is less likely to shift toward the middle region F12, and the concentration of the contraction force on the portion corresponding to the middle region F12 can be suppressed. In the central region, the fit of the intermediate region F12 can be easily maintained while suppressing the movement of the crotch region F13 toward the intermediate region F12. Further, the average contraction force of the crotch region F13 is lower than the average contraction force of the intermediate region F12, and it is easy to secure the width of the absorbent core in the crotch region F13. By securing the width of the absorbent core on the side of the crotch region F13 close to the excretion port, the function of absorbing the bodily fluid by the absorbent core can be secured. In addition, since the intermediate region F12 is arranged outside the crotch side region F13 in the longitudinal direction, a force for lifting upward acts, and the entire absorbent article is unlikely to slip down. The average contraction force of the crotch side region F13 may be 0 to 20% of the average contraction force of the middle region F12. It is easier to maintain the fit of the intermediate region F12. In addition, 0% of the contraction force of any other region with respect to the contraction force of any one region means a very small value close to 0%, and includes, for example, 0.0001%. I have.

The average contraction force of the intermediate region F12 may be 2.0 times or more the average contraction force of the entire central region FC. The intermediate region F12 contracts more in the central region FC, and the dimension in the width direction W becomes shorter. Therefore, the front waistline region S1 has a shape in which the intermediate region F12 arranged in the concave portion at the lower end of the abdomen is more concave than the surrounding region. Since the front waist area S1 has a shape along the depression of the body, the front waist area S1 is more easily fitted to the body. The front waist region S1 can be fitted along the body without bringing the front waist region S1 into close contact with the body. Therefore, the wearing feeling can be improved. In addition, even when the weight of the absorbent article increases due to the absorption of body fluid, the absorbent article is unlikely to slip down. The average contraction force of the entire central region FC is an average value of the contraction forces of the first to tenth regions of the central region FC.

More preferably, the average contraction force of the intermediate region F12 may be 2.5 times or more the average contraction force of the entire central region FC. The effect of fitting the intermediate region F12 to the dent of the body and the effect of suppressing the tightening of parts other than the dent of the body and improving the feeling of wearing can be further obtained.

平均 The average contraction force of the crotch side region F13 may be lower than the average contraction force of the waist region F11. The contraction force of the crotch region F13 is lower than the contraction force of the waist region F11, and it is easy to secure the width of the absorbent core 50 in the crotch region F13. By ensuring the width of the absorbent core 50 on the side of the crotch region F13 close to the excretion opening, the function of absorbing the body fluid by the absorbent core 50 can be secured. In addition, the waist region F11 is located closer to the front edge S1F of the front waistline region S1 than the intermediate region F12, and hardly overlaps with the absorbent core 50. By making the contraction force of the waist region F11 relatively high, it is possible to secure the width of the absorbent core 50 and secure the fit to the body.

前 Further, the front edge 50F of the absorbent core 50 may be arranged in the crotch region F13. The crotch-side region F13 is not easily deformed by the absorbent core 50, and it is easy to secure the length in the width direction W. By securing the length in the width direction of the crotch region F13 in the front waistline region S1, the absorbent core can be applied to the body over a certain range in the width direction to ensure the function of absorbing bodily fluids.

The average contraction force is the average of the contraction forces in the width direction, and can be calculated based on the contraction force measured by the above-described method of measuring the contraction force. Included in the average value of the contraction force of the five regions included in the waist region located 0 to 50% behind the front edge of the front waist region, and the contraction force located 50 to 90% behind the front edge of the front waist region And the average value of the stiffness of the three regions to be calculated. Since the crotch region is only one region, the value of the tenth region is an average value. The average contraction force of the crotch-side region F13 of the present embodiment is 0.014N, and the average contraction force of the waist region F11 is 0.067N.

収縮 The contraction force of each area may be varied depending on the arrangement of the elastic member and the elongation ratio. More specifically, the elastic member 22 that expands and contracts in the width direction W may be arranged only in the intermediate region F12. Instead of this, an elastic member that expands and contracts in the width direction W may be arranged in the waist region F11 and the intermediate region F12, and the expansion ratio of the elastic member in the intermediate region F12 may be configured to be the highest. Instead of this, an elastic nonwoven fabric that expands and contracts in the width direction W may be arranged in the waist region F11 and the intermediate region F12, and a thread-like or band-like elastic member that expands and contracts in the width direction W may be arranged in the intermediate region F12. Since the waist region F11 and the intermediate region F12 are fitted to the body by the contraction of the stretchable nonwoven fabric, the downward shift of the entire front waist region S1 can be suppressed. The intermediate region F12 is easily contracted by the elastic member 22, and is easily fitted by the recess at the lower end of the abdomen. This makes it easier for the intermediate region F12 to function as a deformation base point in the longitudinal direction L. Therefore, the front waistline region S1 is deformed from the intermediate region F12 as a base point, the front waistline region S1 easily follows the deformation of the body, and it is possible to suppress the entire front waistline region S1 from shifting downward. Therefore, the effect of continuing to cover the abdomen with the waist region F11 is more easily obtained.

The thread-like or band-like elastic member 22 that expands and contracts in the width direction W extends forward from the center in the width direction W of the elastic member 22 toward the outside in the width direction W, and the center of the elastic member 22 in the width direction W , May be arranged in an area overlapping with the intermediate area F12. The intermediate region F12 is fitted by the elastic member 22 to the recess at the lower end of the abdomen, and more easily functions as a deformation base point in the longitudinal direction L. Therefore, the front waistline region S1 is deformed from the intermediate region F12 as a base point, and the front waistline region S1 can easily follow the deformation of the body, and the entire front waistline region S1 can be suppressed from shifting downward. Therefore, the effect of continuing to cover the abdomen with the waist region F11 is more easily obtained. Further, the intermediate region F12 can be pulled upward by the elastic member 22 in the wearing state. It is possible to suppress the entire front waistline region S1 including the intermediate region F12 from being lowered, and to continue covering the abdomen with the waist region F11. Further, the elastic member 22 may be arranged in a region overlapping with the high elastic region HS. The high shrinkage area of the central area FC is more easily fitted by the elastic member 22 to the recess at the lower end of the abdomen. Therefore, it is possible to further suppress the longitudinal displacement of the entire absorbent article.

The contraction force of each region may be made different depending on the arrangement of members such as the absorbent core 50 arranged in each region. Specifically, the front edge of the absorbent core 50 may be arranged in the crotch region F13. Since the absorbent core 50 is disposed in the crotch side region F13 and the absorbent core 50 is not disposed in the intermediate region F12, the intermediate region F12 is more likely to contract than the crotch side region F13. In addition, the crotch side region F13 is not easily deformed by the absorbent core 50. Thereby, the deformation of the region on the crotch region side in the front waistline region S1 can be suppressed, and the function of absorbing the bodily fluid by the absorbent core 50 can be secured. Instead, a low weighing portion having a lower weighing than the surrounding absorbent core 50 may be provided in the intermediate region F12. The low weighing portion is a portion where the weighing of the absorbent material is lower than the surroundings, and may include a portion having a basis weight of 0.

Although the present invention has been described in detail with reference to the above embodiments, it is apparent to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed aspects without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description in this specification is for the purpose of illustrative explanation, and has no restrictive meaning to the present invention.

For example, in the above embodiment, the absorbent main body 40 is configured separately from the front waistline member 20 and the rear waistline member 30. Instead, the absorbent main body 40 may be configured integrally with the front waistline region S1 and the rear waistline region S2.

In addition, in the above embodiment, the absorbent article 10 is a so-called pants-type absorbent article having the side joints 60. Instead, the absorbent article 10 may be a tape-type absorbent article. In this case, the absorbent article 10 does not have the side joining portion 60, and may have a fastening tape that detachably fixes the front waistline region S1 and the rear waistline region S2 to each other. In the tape-type absorbent article, the region provided with the leg opening forms the crotch region S3, and the boundary between the front waist region S1 and the crotch region S3 is defined by the front edge of the leg opening. The boundary between the rear waistline region S2 and the crotch region S3 may be defined by the rear edge of the leg opening. The leg opening is a portion that is arranged around the leg of the wearer, and is a portion that is concave toward the inside in the width direction at the outer edge of the absorbent article.

吸収 It is possible to provide an absorbent article that fits on the abdomen of the wearer and easily covers the abdomen.

DESCRIPTION OF SYMBOLS 10 Absorbent article 20 Front waist member 22 Elastic member 30 Rear waist member 50 Absorbent core 60 Side joint 70 Low rigidity part F11 Waist area F12 Middle area F13 Crotch area FC Central area FS Side area S1 Front waist area S2 Rear waist Area S3 Inseam area L Longitudinal direction W Width direction

Claims

Longitudinal and width directions orthogonal to each other,
An absorbent article having a front waist region, a rear waist region, and a crotch region disposed between the front waist region and the rear waist region,
In a central region located at the center in the width direction of the front waist region, a plurality of regions obtained by equally dividing the total length in the longitudinal direction of the central region into ten are provided.
The high contraction region having the highest contraction force in the width direction in the plurality of regions is disposed in an intermediate region located 50 to 90% behind the front end of the central region with respect to the entire length in the longitudinal direction of the central region. Yes,
The intermediate region has a low-rigidity portion serving as a deformation base point in the longitudinal direction in the intermediate region,
An absorbent article, wherein at least a part of the low rigidity portion is arranged along the width direction in the high shrinkage region.
吸収 The absorbent article according to claim 1, wherein the intermediate region is arranged to face a lower end of a wearer's abdomen.
The intermediate region has a low rigidity region having a low rigidity in the longitudinal direction,
3. The absorbent article according to claim 1, wherein the low-rigidity region is at least 20% of a total length in the longitudinal direction of the front waistline region. 4.
The central region has a waist region located 0 to 50% behind the front edge of the front waist region,
The absorbent article according to any one of claims 1 to 3, wherein the waist region is provided with a high rigidity region higher than the average rigidity of the plurality of regions.
The waist region has a constant rigidity region in which the rigidity in the longitudinal direction is uniform,
The absorbent article according to claim 4, wherein the length in the longitudinal direction of the constant rigidity region is 20% or more of the entire length of the waist region.
6. The absorbent article according to claim 4, wherein an average rigidity of the intermediate region is lower than an average rigidity of the waist region.
At least the crotch region and the front waist region having an absorbent core,
The central region has a crotch region located 90 to 100% rearward from a front edge of the front waistline region,
The absorbent article according to any one of claims 1 to 6, wherein a front edge of the absorbent core is disposed in the crotch region.
The central region has a waist region located 0 to 50% behind the front edge of the front waist region,
In the front waist region, at least a stretchable nonwoven fabric that expands and contracts in the width direction, and a thread-like or band-like stretchable member that expands and contracts in the width direction,
The elastic nonwoven fabric is arranged in the waist region and the intermediate region,
The absorbent article according to any one of claims 1 to 7, wherein the elastic member is arranged at least in the intermediate region.
In the front waist region, a thread-like or band-like elastic member that expands and contracts in the width direction is provided,
The elastic member extends forward from the center in the width direction of the elastic member toward the outside in the width direction,
The absorbent article according to any one of claims 1 to 8, wherein a center of the elastic member in the width direction is arranged in a region overlapping the intermediate region.
The central region has a waist region located 0 to 50% behind the front edge of the front waist region,
The absorbent article according to any one of claims 1 to 9, wherein an average contraction force of the intermediate region is higher than an average contraction force of the waist region.
The absorbent article according to claim 10, wherein the waist region has an average contraction force of 10 to 50% of the average contraction force of the intermediate region.
The central region has a crotch region located 90 to 100% rearward from a front edge of the front waistline region,
The absorbent article according to any one of claims 1 to 11, wherein an average contraction force of the crotch side region is lower than an average contraction force of the intermediate region.