CN108289765B

CN108289765B - Absorbent article

Info

Publication number: CN108289765B
Application number: CN201680065402.7A
Authority: CN
Inventors: 西谷和也; 木下英之
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2015-11-09
Filing date: 2016-10-21
Publication date: 2021-06-15
Anticipated expiration: 2036-10-21
Also published as: CN108289765A; TWI710363B; JP2017086378A; TW201729770A; JP6190861B2; KR102569786B1; WO2017082019A1; KR20180081059A

Abstract

The invention provides an absorbent article which can be continuously attached to the body even in the movement of a wearer. The absorbent article has a 1 st curved portion (41a) and a 2 nd curved portion (41b) that extend in the width direction behind the excretory opening contact region (S1). A1 st region (R1) adjacent to the 1 st bend in front of the 1 st bend, a 2 nd region (R2) adjacent to the 2 nd bend in rear of the 2 nd bend, and a 1 st intermediate region (41) located between the 1 st bend and the 2 nd bend in the front-rear direction (L) are provided. The weight per unit area of the absorbent material in the 1 st intermediate region is less than the weight per unit area of the absorbent material in the 1 st and 2 nd regions. The 1 st bend, the 2 nd bend, and the 1 st intermediate region extend from the centerline across a midpoint between the outer edge and the centerline of the absorbent core in the width direction. The length of the 1 st intermediate region in the front-rear direction is 10mm to 40 mm.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article such as a sanitary napkin.

Background

The absorbent article for night use is used in a state where a wearer lies down, and is used for a longer time than the absorbent article for daily use. Therefore, when the absorbent article for night use is used, back leakage is likely to occur. Patent document 1 discloses an absorbent article for night use which prevents back leakage.

The absorbent article of patent document 1 includes: a discharge part facing part disposed to face the bodily fluid discharge part of the wearer; and a rear portion disposed on a rear back side of the excretion portion facing portion. The absorbent body in the rear portion is formed with a plurality of high-density portions and low-density portions extending in the width direction. In the absorbent article of patent document 1, when the body fluid flows rearward, the high-density portion having a high density holds the body fluid, and the low-density portion having a low density flexibly deforms, thereby suppressing rear leakage.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2010-136900

Disclosure of Invention

The inventors of the present application conducted various investigations on deformation of the body of the wearer. As a result, they found that: the absorbent article receives various external forces according to the movement of the wearer's body, and a part of the absorbent article may be in close contact with the body or may be separated from the body. The inventor also found that: when the closely attached part of the absorbent article is separated from the body, the wearer is particularly given a feeling of discomfort, such as whether or not body fluid leaks.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an absorbent article which is easy to continuously adhere to the body of a wearer even when the wearer moves and has good wearing comfort.

An absorbent article according to one embodiment includes: a front-back direction and a width direction orthogonal to each other; an excretory opening abutment region opposed to an excretory opening of the wearer; a rear region located on a rear side of the drain port abutment region; and an absorbent body that is disposed at least in the excretory opening contact region and the rear region and has an absorbent core containing an absorbent material, wherein the absorbent article is provided with a 1 st bend portion extending in the width direction behind the excretory opening contact region and a 2 nd bend portion extending in the width direction at a position behind the 1 st bend portion, the 1 st bend portion and the 2 nd bend portion being configured to enable the absorbent article to bend in the thickness direction, the absorbent article is provided with a 1 st region adjacent to the 1 st bend portion in front of the 1 st bend portion, a 2 nd region adjacent to the 2 nd bend portion behind the 2 nd bend portion, and a 1 st intermediate region located between the 1 st bend portion and the 2 nd bend portion in the front-rear direction, and the absorbent material in the 1 st intermediate region has a weight per unit area that is greater than the 1 st region and the 2 nd bend portion The absorbent material of the region has a low weight per unit area, the 1 st bend, the 2 nd bend, and the 1 st intermediate region extend from the center line in the width direction beyond a midpoint between the outer edge of the absorbent core and the center line, and the length of the 1 st intermediate region in the front-back direction is 10mm or more and 40mm or less.

Drawings

Fig. 1 is a plan view of an absorbent article according to an embodiment.

Fig. 2 is a plan view of the absorbent article viewed from the side opposite to fig. 1.

Fig. 3 is a cross-sectional view of the absorbent article taken along line 3A-3A of fig. 1.

Fig. 4 is a plan view of an absorber according to an embodiment.

Fig. 5 is a perspective view of the absorbent article in use.

Fig. 6 is a schematic cross-sectional view of the absorbent article in use, taken along the line 6A-6A of fig. 1.

Fig. 7 is a schematic sectional view of the absorbent article in use, taken along the line 7A-7A in fig. 1.

Fig. 8 is a schematic view of an absorbent article in use in a standing position.

Fig. 9 is a schematic view of an absorbent article in a state where the buttocks of a wearer are not deformed in a lying posture.

Fig. 10 is a schematic view of an absorbent article in a state where the buttocks of a wearer are deformed in a lying posture.

Fig. 11 is a schematic diagram illustrating a modification of the absorbent article.

Fig. 12 is a schematic view illustrating another modification of the absorbent article.

Fig. 13 is a plan view of another embodiment of an absorbent article.

Detailed Description

(1) Unitary structure of absorbent article

The overall structure of the absorbent article 1 of the embodiment will be described with reference to fig. 1 to 4. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. The drawings are schematic, and it should be noted that the scale of each dimension and the like are different from those in reality. Therefore, specific dimensions and the like should be determined with reference to the following description. The drawings also include portions having different dimensional relationships and ratios from each other.

Fig. 1 is a plan view of an absorbent article, and fig. 2 is a rear view of the absorbent article. Fig. 3 is a cross-sectional view of the absorbent article taken along line 3A-3A shown in fig. 1. Fig. 4 is a plan view of an absorber provided in the absorbent article. The absorbent article 1 of the present embodiment is a sanitary napkin for night use.

The absorbent article 1 has: a front-back direction L extending toward the front side (ventral side) and the back side (dorsal side) of the wearer; a width direction W orthogonal to the front-rear direction L; and a thickness direction T extending toward the skin-facing surface side T1 and the non-skin-facing surface side T2 of the wearer.

The absorbent article 1 has an excretory opening abutment region S1, a front region S2, and a rear region S3. The excretory opening abutment region S1 is a region opposing the excretory opening (e.g., vaginal opening) of the wearer. When the absorbent article is worn in underwear, the excretory opening contact region S1 is located in the crotch portion of the underwear. That is, the excretory opening contact region S1 is a region disposed in the crotch of the wearer, i.e., between the legs of the wearer.

The front region S2 is located on the front side of the drain port contact region S1. The front end edge of the front side region S2 defines the front end edge 91 of the absorbent article 1. The rear region S3 is located rearward of the drain port contact region S1. The rear end edge of the rear region S3 defines the rear end edge 92 of the absorbent article 1. The length of the rear region S3 in the front-rear direction L may be longer than the length of the excretory opening abutment region S1 in the front-rear direction L.

The absorbent article 1 includes: an absorbent body 30 having an absorbent core formed by stacking absorbent materials; a skin sheet 10 located on the skin-facing surface side T1 with respect to the absorber 30; and a non-skin surface sheet 20 located closer to the non-skin surface side T2 than the absorber 30. The skin sheet 10 has: a liquid-permeable top sheet 11 that covers at least the widthwise center of the absorber 30; and a side sheet 12 that covers the outer edge (outer end in the width direction) of the surface sheet 11 and extends outward in the width direction. The non-skin top sheet 20 is a liquid impermeable sheet.

The top sheet 11 is a liquid-permeable sheet that is permeable to liquid such as body fluid. The top sheet 11 covers at least the surface of the absorbent body 30. The surface sheet 11 is not particularly limited as long as it is a sheet-like material having a liquid-permeable structure, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, or a mesh sheet. As the material of the woven fabric or the nonwoven fabric, any of natural fibers and chemical fibers can be used.

The side sheet 12 can be selected from the same materials as the surface sheet 11. However, in order to prevent menstrual blood from flowing out beyond the side sheet 12 to the outside of the absorbent article 1, the side sheet 12 is preferably hydrophobic or water-repellent. The side sheets 12 are disposed on the outer edges of the main body 2, the side flaps 3, and the hip flaps 4, which will be described later.

The non-skin panel 20 has a length substantially the same as the length of the skin panel 10. The non-skin surface sheet 20 may be a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene or the like, an air-permeable resin film, a sheet obtained by joining an air-permeable resin film to a nonwoven fabric such as spunbond or spunlace, or the like.

The absorber 30 has: an absorbent core 31 formed by laminating absorbent materials; and a core pack 32 covering the absorbent core 31. As the absorbent material, for example, hydrophilic fibers, pulp, and SAP can be exemplified.

The core wrap 32 may cover the absorbent core 31 at least at a position closer to the skin surface side than the absorbent core 31. As a specific example, the core pack 32 may have a 1 st cover portion disposed on the skin surface side of the absorbent core 31 and a 2 nd cover portion disposed on the non-skin surface side of the absorbent core 31.

The skin sheet 10 has a non-joined area which is not joined to the core pack 32 in the 1 st intermediate area 41 described later. The non-joined region extends continuously in the width direction W. The non-joined region may also extend at least from one end to the other end in the width direction W of the 1 st intermediate region 41.

The skin sheet 10 may have a non-joined region that does not join with the core pack 32 in the 1 st folding guide 40 described later. The non-joined region extends continuously in the front-rear direction L.

The absorbent article 1 has a main body 2, side flaps 3, and hip flaps 4. The main body 2 is located at the center of the absorbent article 1 in the width direction W and extends in the front-rear direction L. The hip flaps 4 extend outward in the width direction W from the outer edges of the main body 2, and are portions that project outward in the width direction W in the rear side regions S3. The outer edge 2E of the main body 2 coincides with the outer edge 30E of the absorber 30 in the width direction W.

The main body 2 includes a skin sheet 10, a non-skin sheet 20, and an absorber 30. More specifically, the main body 2 includes the surface sheet 11, a part of the side sheet 12, the non-skin surface sheet 20, and the absorber 30.

The side sheet 12 extends outward in the width direction W from an end region of the skin sheet 10 in the width direction W. The inner edge of the side sheet 12 extends in the front-rear direction L and is folded back outward in the width direction W. An extensible member 90 that extends and contracts in the front-rear direction L is disposed between the folded portions of the side sheet 12. The inner edge of the side sheet 12 is not joined to the surface sheet 11. The stretchable member 90 is joined to the side sheet 12 in an extended state of a predetermined length. Thereby, the inner edge of the side sheet 12 contracts in the front-rear direction L in a natural state. In this way, the inner edge of the side sheet 12 and the stretchable member 90 constitute a standing leak-proof cuff.

The stretchable member 90 is joined to the side sheet 12 at the end in the front-rear direction L. The joint between the stretchable member 90 and the side sheet 12 is a portion where the stretching force of the stretchable member 90 is exerted. The stretchable member 90 has non-joined portions at both ends in the front-rear direction L which are not joined to the side sheet 12. The non-joined portion of the stretchable member 90 becomes a portion where the stretching force of the stretchable member 90 cannot be exhibited. In the present specification, the portion of the stretchable member 90 excluding the portion where the stretching force of the stretchable member 90 cannot be exhibited is referred to as an "effective length portion Le" of the stretchable member 90.

The effective length portion Le exhibiting stretchability of the stretchable member 90 extends from the 1 st region R1 to the 2 nd region R2 across the 1 st intermediate region 41 in the front-rear direction L. The rear side edge of the effective length part Le of the stretchable member 90 may be disposed forward of the rear side edge of the hip panel attachment region 64 described later.

The flaps 3 are provided in the excretory opening contact region S1 and extend outward in the width direction from the absorbent body 30. The leading edge of each flap 3 is defined by the root of the flap 3 and corresponds to the portion located on the leading side of the two portions recessed most inward in the width direction W. In the absorbent article having the side flap 3, the front end edge of the side flap 3 defines a boundary between the excretory opening contact region S1 and the front region S2. The rear end edge of the flap 3 is defined by the root of the flap 3 and corresponds to the portion located on the rear side of the two portions recessed most inward in the width direction W. The rear end edge of the flap 3 may be located between the excretory opening abutment region S1 and the rear region S3. Here, a region between the front end edge of the side flap 3 and the rear end edge of the side flap 3 in the front-rear direction L may be referred to as a "flap region". In the absorbent article having the side flaps, the excretory opening contact region S1 is substantially the same region as the side flap region.

The side flap 3 has a side panel 12 and a non-skin facing panel 20. The center of the side flap 3 in the front-rear direction is disposed so as to face the excretory opening of the wearer. The flaps 3 are configured to be foldable toward the non-skin surface sheet 20, and to be foldable toward the non-skin facing surface of the crotch portion of underwear during use. The hip flaps 4 are located behind the side flaps 3. The hip flap 4 is configured to be disposed on the skin-facing surface side of the underwear without being folded back toward the non-skin-facing surface side of the underwear when in use.

The front end edge of the hip flap 4 is defined by the base of the hip flap 4 and corresponds to the portion recessed most inward in the width direction W. The front end edge of the hip flap 4 may or may not coincide with the rear end edge of the side flap 3.

As shown in fig. 2, an adhesive region to which an adhesive for fixing the absorbent article to the underwear S is applied is provided on the non-skin-facing surface of the non-skin-facing sheet 20. The adhesive regions include a 1 st main body adhesive region 61 and a 2 nd main body adhesive region 62 disposed on the main body 2, a flap adhesive region 63 disposed on the flap 3, and a hip flap adhesive region 64 disposed on the hip flap 4. The 1 st main body bonding region 61 and the 2 nd main body bonding region 62 are separated in the front-rear direction, and the 1 st main body bonding region 61 is disposed in a position forward of the 2 nd main body bonding region 62.

The adhesive regions 61-64 are covered with a release sheet before use. The release sheet prevents deterioration of the adhesive before use. The release sheet is peeled off by the wearer at the time of use. In the case of an absorbent article having no release sheet, the adhesive region may be prevented from deteriorating before use by a wrapping sheet that wraps the absorbent article independently.

The non-skin surface sheet of the absorbent article has a non-adhesive region where no adhesive is provided. The non-adhesive region extends from one end to the other end in the width direction W of the absorbent article in a region at least partially overlapping the 1 st intermediate region 41 (see fig. 2).

The absorbent article 1 is provided with a 1 st bent portion 41a and a 2 nd bent portion 41 b. The 1 st bent portion 41a and the 2 nd bent portion 41b are located on the rear side of the center in the front-rear direction of the excretory opening contact region S1 and on the front side of the rear end edge of the absorbent core 31. The 1 st bent portion 41a and the 2 nd bent portion 41b extend in the width direction W, and are configured to be able to bend the absorbent article 1 in the thickness direction T. In the absorbent body 30 of the present embodiment, the rear end edge of the absorbent core substantially coincides with the rear end edge of the absorbent body.

The absorbent article 1 has a 1 st region R1 adjacent to the 1 st bend 41a in front of the 1 st bend 41a, a 2 nd region R2 adjacent to the 2 nd bend 41b behind the 2 nd bend 41b, and a 1 st intermediate region 41 located between the 1 st bend 41a and the 2 nd bend 41b in the front-rear direction L. The 1 st region R1 is a region from the leading edge 30F of the absorbent body 30 to the 1 st bend portion 41 a. The 2 nd region R2 is a region from the rear end edge 30R of the absorber 30 to the 2 nd bent portion 41 b. The 1 st intermediate region 41 is a region between the 1 st bent portion 41a and the 2 nd bent portion 41 b. The weight per unit area of the absorbent material of the 1 st intermediate region 41 is less than the weight per unit area of the absorbent material of the 1 st region R1 and less than the weight per unit area of the absorbent material of the 2 nd region R2. The 1 st intermediate region 41 may be a region in which the basis weight of the absorbent material, particularly the fibrous material (for example, pulp fibers) in the absorbent material is 0 in the present embodiment, or a region in which a slight amount of the absorbent material mixed from the 1 st region R1 and the 2 nd region R2 is arranged although the basis weight in design is 0.

The weight per unit area of the absorbent in the 1 st intermediate region 41 is preferably 1/3 or less of the weight per unit area of the absorbent in the 1 st region R1 adjacent to the 1 st bend 41 a. The weight per unit area of the absorbent material in the 1 st intermediate region 41 is preferably 1/3 or less of the weight per unit area of the absorbent material in the 2 nd region R2 adjacent to the 2 nd bend 41 b. As a result, the 1 st intermediate region 41 easily exhibits a function of absorbing an external force applied to the absorbent article as described later, and is easily deformed in accordance with the movement of the wearer's body. In order to more significantly exhibit this effect, the weight per unit area of the absorbent material in the 1 st intermediate region 41 is 1/5 or less, and more preferably 1/10 or less, of the weight per unit area of the absorbent material in the 1 st region R1 adjacent to the 1 st bend 41 a. The absorbent may be dispersed locally without being present in the entire 1 st intermediate region 41.

The 1 st bend portion 41a serves as a boundary of the stiffness change. The region forward of the 1 st bend portion 41a has a different rigidity from the region rearward of the 1 st bend portion 41 a. More specifically, the weight per unit area of the absorbent material in the region on the front side of the 1 st bent portion 41a is higher than the weight per unit area of the absorbent material in the region on the rear side of the 1 st bent portion 41 a. Thus, the region on the front side of the 1 st bent portion 41a has higher rigidity than the region on the rear side of the 1 st bent portion 41 a.

The 2 nd bent portion 41b is located rearward of the 1 st bent portion 41 a. The 2 nd bend 41b is a boundary of the stiffness change. The region forward of the 2 nd bent portion 41b has a different rigidity from the region rearward of the 2 nd bent portion 41 b. More specifically, the basis weight of the absorbent in the region on the front side of the 2 nd bent portion 41b is lower than the basis weight of the absorbent in the region on the rear side of the 2 nd bent portion 41 b. Thus, the stiffness of the region forward of the 2 nd bent portion 41b is lower than the stiffness of the region rearward of the 2 nd bent portion 41 b.

The length of the 1 st intermediate region 41 in the front-rear direction L is longer than the thickest part of the absorber 30 in the 1 st region R1 adjacent to the 1 st bend 41a and the absorber 30 in the 2 nd region R2 adjacent to the 2 nd bend 41 b.

The length of the 1 st intermediate region 41 in the front-rear direction is preferably 10mm to 40 mm. In the configuration in which the length of the 1 st intermediate region 41 in the front-rear direction varies, the length of the 1 st intermediate region 41 in the front-rear direction at the center in the width direction W may be 10mm or more and 40mm or less. More preferably, the length of the 1 st intermediate region 41 in the front-rear direction is 10mm or more and 30mm or less.

The distance X between the center of the 1 st bent portion 41a in the width direction and the center of the excretory opening contact region S1 in the front-rear direction is preferably 25mm or more. Further, the distance X between the center of the 1 st bent portion 41a in the width direction and the center of the excretory opening contact region S1 in the front-rear direction is preferably 80mm or less. In the configuration in which the 1 st bent portion 41a has a predetermined length in the front-rear direction, the distance between the center in the width direction of the front end edge of the 1 st bent portion 41a and the center in the front-rear direction of the excretory opening contact region S1 may be 25mm to 80 mm.

The 1 st bent portion 41a and the 2 nd bent portion 41b are curved in a convex shape rearward in a plan view. In this case, the 1 st intermediate region 41 is also curved convexly rearward in a plan view. More specifically, the center of the 1 st bent portion 41a in the width direction is located rearward of the outer edge of the 1 st bent portion 41 a. The center of the 1 st bent portion 41a in the width direction is convex rearward. The center in the width direction of the 2 nd bent portion 41b is located rearward of the outer edge of the 2 nd bent portion 41 b. The center of the 2 nd bent portion 41b in the width direction is convex rearward. The distance between the 1 st bent portion 41a and the 2 nd bent portion 41b in the front-rear direction may be constant or may vary.

The 1 st bent portion 41a, the 2 nd bent portion 41b, and the 1 st intermediate region 41 do not overlap with the adhesion region 60 in the thickness direction T. The 1 st main body bonding region 61 is disposed in the 1 st region R1, and the 2 nd main body bonding region 62 is disposed in the 2 nd region R2. The rear end edge 61R of the 1 st body bonding region 61 is located forward of the 1 st bent portion 41a, and the front end edge 62F of the 2 nd body bonding region 62 is located rearward of the 2 nd bent portion 41 b.

The 1 st bend 41a, the 2 nd bend 41b, and the 1 st intermediate region 41 extend from the centerline CL in the width direction W beyond the midpoint in the width direction W between the outer edge 30E of the absorbent core and the centerline CL. That is, the length of the 1 st bend portion 41a, the 2 nd bend portion 41b, and the 1 st intermediate region 41 is equal to or more than half the length of the absorbent core 31 in the width direction W.

Further, the outer edge of the 1 st bend 41a and the outer edge of the 2 nd bend 41b are preferably located at the outer edge of the absorbent core 31. That is, the 1 st bent portion 41a and the 2 nd bent portion 41b may be formed over the entire width direction of the absorbent core. In this case, the absorbent core 31 is broken in the front-rear direction L by the 1 st bent portion 41a and the 2 nd bent portion 41 b. In the present embodiment, the outer edge of the absorbent core 31 of the absorbent body 30 substantially coincides with the outer edge of the absorbent body 30. Thereby, the outer edge of the 1 st bent portion 41a and the outer edge of the 2 nd bent portion 41b coincide with the outer edge 30E of the absorber 30.

The absorbent article 1 has the 1 st bending guide 40 extending along the center line CL connecting the centers in the width direction W in the rear side region S3 and configured to be able to bend the absorbent article. In the present embodiment, the 1 st bending guide portion 40 is composed of the 3 rd bent portion 42a, the 4 th bent portion 42b, and the 2 nd intermediate region 42. Alternatively, the 1 st bend guide 40 may be formed of a compressed portion formed by compressing the absorbent core.

The 3 rd bent portion 42a and the 4 th bent portion 42b extend in the front-rear direction L, and are configured to be able to bend the absorbent article 1 in the thickness direction T. The weight per unit area of the absorbent in the 2 nd intermediate region 42 is lower than the weight per unit area of the absorbent at the position further outward in the width direction W than the 1 st bend guide 40. The weight per unit area of the absorbent material of the 2 nd intermediate region 42 is preferably 1/3 or less of the weight per unit area of the absorbent material of the 2 nd region R2. This makes the 2 nd intermediate region 42 easily protrude toward the hip of the wearer as will be described later. In order to more significantly exhibit this effect, the basis weight of the absorbent material in the 2 nd intermediate region 42 is 1/5 or less, and more preferably 1/10 or less, of the basis weight of the absorbent material in the 2 nd region R2. The absorbent may be dispersed locally without being present in the entire 2 nd intermediate region 42. That is, the 2 nd intermediate region 42 may be a region in which a slight amount of the absorbent is mixed from the 2 nd region R2, although the design basis weight is 0. Alternatively, the 2 nd intermediate region 42 may be a region in which the weight per unit area of the absorbent material is 0.

The 3 rd bent portion 42a is a boundary of the stiffness change. The rigidity of the regions on both sides across the 3 rd bent portion 42a are different from each other. The 4 th bend 42b is a boundary of the stiffness change. The areas on both sides across the 4 th bend 42b have different rigidities from each other. The 2 nd middle region 42 extends along the centerline CL.

The 1 st bend guide 40 preferably reaches a position further to the rear side than the center of the rear region S3 in the front-rear direction L. The 1 st bend guide 40 may be connected to the 1 st intermediate region 41. In this case, the 2 nd intermediate region 42 constituting the 1 st bending guide 40 may be connected to the 1 st intermediate region 41. As described later in the description of the wearing state, the 1 st bending guide portion 40 guides the convex bending deformation toward the wearer along the buttocks. Therefore, the absorbent material of the front-side end portion that is bent and deformed in the front-rear direction L is likely to gather in a convex shape and become hard. If the 1 st bending guide 40 is continuously connected to the 1 st intermediate region 41, the absorbent material of the front end portion that is bent and deformed in the front-rear direction L has a small weight per unit area, and therefore the front end portion that is bent and deformed is hard to be hardened. Thus, the wearer can be given a comfortable wearing feeling. The 1 st bend guide 40 may not be connected to the 1 st intermediate region 41.

The absorbent article may have the 2 nd bend guide 43 extending outward in the width direction W from the 1 st bend guide 40 in the rear side region S3 and configured to be able to bend the absorbent article. The 2 nd bend guide portion 43 may be constituted by a region having an absorbent material with a weight per unit area smaller than that of the absorbent material of the 2 nd region R2. In this case, the weight per unit area of the absorbent constituting the 2 nd bending guide 43 is preferably 1/3 or less of the weight per unit area of the absorbent in the 2 nd region R2. The 2 nd bending guide portion 43 may be a region in which the basis weight of the absorbent material is 0, or a region in which a slight amount of the absorbent material mixed from the 2 nd region R2 is arranged although the basis weight in design is 0.

The absorber 30 has a middle-high portion 33 located inward in the width direction of the outer edge 30E of the absorber 30. The intermediate height portion 33 is located in the 1 st region R1 and is located inward in the width direction of the outer edge 30E of the absorbent body 30 in the 1 st region R1. The thickness of the intermediate height portion 33 is larger than the thickness of the outer edge 30E of the absorbent body 30 of the 1 st region R1. The weight per unit area of the absorbent material in the intermediate height portion 33 is greater than the weight per unit area of the absorbent material in the outer edge 30E of the absorbent body 30 in the 1 st region R1. The mid-height portion 33 is located on the rear side in the 1 st region R1, adjacent to the 1 st bend 41 a.

In the structure in which the absorber includes two absorption layers, the middle-high portion of the absorber may have two absorption layers, and the portion other than the middle-high portion of the absorber may have only one absorption layer. In addition, as a modification, the middle-high portion of the absorbent body may have an auxiliary sheet for drawing in the body fluid, and the portions other than the middle-high portion of the absorbent body may not have the auxiliary sheet.

The absorbent article 1 has a compressed portion formed by compressing at least the absorbent core 31 in the thickness direction T. The compression section may have a front side compression section 81 and a length compression section 82 (see fig. 1 and 4).

The front compression unit 81 is provided at least in the drain port contact region S1. The front compression unit 81 may extend from the drain contact region S1 to the front region S2. The front compression unit 81 may be formed by compressing the topsheet 11, the absorbent core 31, and the core pack 32 in the thickness direction T. The front compression unit 81 has sections along the front-rear direction L provided on both sides in the width direction W of the middle-high portion 33. The front compression section 81 may define the side edge of the middle-height section 33 in the width direction W.

The front compression section 81 is bent in the width direction W near the front end edge of the absorbent core 31 and is continuously connected in a U-shape. Alternatively, the front compression units 81 may be provided independently on both sides in the width direction W of the middle-high portion 33. That is, the pair of front-side compression units 81 may be provided independently so as to be disconnected from each other.

The length-compressed part 82 is provided on both sides of the rear region S3 with the center line CL therebetween, more specifically, with the 1 st bend guide 40 therebetween. The length-compressed part 82 is formed by compressing at least the absorbent member 30 in the thickness direction. The length-compressed part 82 may be formed by compressing the absorbent member 30 and the top sheet 11 in the thickness direction.

The length compression portion 82 extends in the front-rear direction L. The length compressing portion 82 may extend linearly along the front-rear direction L or may extend curvilinearly at an angle to the front-rear direction L. The length compressed part 82 may be formed at a position on the front side of the position P1 of the maximum width of the hip flap 4. The length-compressed part 82 preferably does not reach the 1 st intermediate region 41.

The pair of length-compressing portions 82 may be formed at positions of the 2 nd bending guide portion 43 with a space in the front-rear direction L.

The measurement of "thickness of absorbent body" in the present specification is performed by the following measurement method.

When the absorbent article 1 is sealed in a package or the like, the absorbent article 1 is taken out of the package, and a sample that has been left in this state for 12 hours in an environment of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH is used.

The measurement position is the product widthwise central portion of the absorbent body. In the measurement, the measurement is performed in a state in which the stretchable member of the absorbent article is stretched, not in a state in which the absorbent article is contracted. In addition, the portions other than the absorbent body, such as the skin sheet and the non-skin sheet other than the absorbent body, are removed. Using a dial gauge PEACOCK manufactured by Kawasaki corporation, a test piece having a size of 30 mm. times.30 mm was prepared using a gauge head having a diameter of 10mm, and the thickness of the test piece was measured. The measuring pressure of the measuring device on the test piece is adjusted to 3g/cm². Here, the above measurement was performed for 10 samples in the respective states, and the average value thereof was taken as the length.

In the present specification, "weight and density per unit area of the absorbent body" is measured by the following measurement method.

For an absorbent article wrapped in a package, the package is opened, the folded absorbent article is unfolded, and the thickness and area of a portion to be measured for weight and density per unit area are measured. Next, a portion to be measured for the weight per unit area and the density is cut out from the absorbent article, and the weight of the cut-out portion is measured. Next, the weight of the absorber was measured by removing the parts other than the absorber such as the front sheet and the back sheet from the cut-out parts. The weight per unit area is calculated from the weight of the absorbent body and the area of the portion where the weight per unit area and the density are to be measured. The density was calculated from the weight per unit area and the thickness.

The "length" in the present specification is measured by the following measurement method.

Then, the length of the site to be measured in this state was measured along the site to be measured using an elastic tape (tape: glass fiber as a base material and polyvinyl chloride as a cover layer) manufactured by affinity measuring co. Here, the above measurement was performed for 10 samples in the respective states, and the average value thereof was taken as the length.

At the position of the 1 st intermediate region 41, the 1 st wrap of the core package 32 and the 2 nd wrap of the core package 32 may be joined in a mutually compressed state with or without the absorbent core 31 interposed therebetween. Hereinafter, this joint is referred to as "1 st pressure-bonding section 51" (see fig. 4).

In addition, at the position of the 1 st bend guide 40, the 1 st covering portion of the core package 32 and the 2 nd covering portion of the core package 32 may be joined in a mutually compressed state with or without the absorbent core 31 interposed therebetween. Hereinafter, this joint is referred to as "2 nd pressure-bonding section 52" (see fig. 4).

In addition, at the position of the 2 nd bending guide portion 43, the 1 st covering portion of the core pack 32 and the 2 nd covering portion of the core pack 32 may be joined in a mutually compressed state with or without the absorbent core 31 interposed therebetween. Hereinafter, this joint is referred to as "3 rd crimping part 53" (see fig. 4).

In the case where the 1 st intermediate region 41, the 1 st bend guide 40, and the 2 nd bend guide 43 do not have an absorbent material constituting the absorbent core 31, the pressure bonded

sections

51, 52, and 53 are portions where the 1 st cover and the 2 nd cover are directly bonded to each other without interposing the absorbent core 31 therebetween. When the 1 st intermediate region 41, the 1 st bend guide 40, and the 2 nd bend guide 43 are made of an absorbent material constituting the absorbent core 31, the pressure-bonding

sections

51, 52, and 53 are portions where the 1 st cover and the 2 nd cover are indirectly joined to each other through the absorbent core 31.

The width of the 1 st pressure-bonding section 51 in the front-rear direction L is preferably smaller than the width of the 1 st intermediate region 41 in the front-rear direction L. Further, the 1 st crimp part 51 preferably extends continuously along the width direction W.

The 2 nd crimping portion 52 extends in the front-rear direction L along the 1 st bending guide 40. The width of the 2 nd pressure-bonding section 52 in the width direction W is preferably smaller than the width of the 1 st bending guide 40 in the width direction W. The 2 nd crimping part 52 may be connected to the 1 st crimping part 51.

The 3 rd crimping part 53 extends along the 2 nd bending guide part 43. The width of the 3 rd pressure-bonding section 53 in the front-rear direction L is preferably smaller than the width of the 2 nd bending guide section 43 in the front-rear direction L. The 3 rd crimping part 53 may be connected to the 2 nd crimping part 52.

The 1 st, 2 nd, and/or 3

rd crimping portions

51, 52, and/or 53 are preferably not formed on the skin patch 10. More specifically, the 1 st crimp part 51, the 2 nd crimp part 52, and/or the 3 rd crimp part 53 is preferably formed by crimping only the core pack 32, or formed by crimping only the absorbent core 31 and the core pack 32. The pressure-bonding

sections

51, 52, and 53 can be formed by embossing.

(2) Wearing state of absorbent article

Next, the wearing state of the absorbent article 1 configured as above will be described. Fig. 5 is a perspective view of the absorbent article in use. Fig. 6 is a cross-sectional view of the absorbent article 1 worn by the wearer, taken along the line 6A-6A in fig. 1. Fig. 7 is a cross-sectional view of the absorbent article 1 worn by the wearer, taken along the cross-section 7A-7A in fig. 1.

When the absorbent article 1 as a sanitary napkin is worn, the absorbent article 1 is fixed to underwear S. The excretory opening contact region S1 of the absorbent article 1 is sandwiched between the legs of the wearer and receives a force from the outside in the width direction W to the inside in the width direction W. By this force, the excretory opening contact region S1 is lifted so as to fit the vicinity of the excretory opening of the wearer (see fig. 6).

The anus and the groin are positioned behind the perineum of the wearer, which is positioned behind the labia majora. The cross-sectional shape of the body in the vicinity of the posterior part of the perineum is a shape in which the center in the width direction is depressed. The rear region S3 of the absorbent article is disposed so as to face the buttocks of the wearer.

In the rear region S3, the 1 st bend guide portion 40 extending in the front-rear direction L along the center line CL is formed. Therefore, the center of the rear region S3 in the width direction W tends to protrude toward the wearer' S body by a force acting from the outside to the inside of the absorbent article (see fig. 5 and 7). Thereby, the absorbent article 1 can be deformed in the rear side region S3 in accordance with the shape of the wearer' S groin. As a result, the wearer can feel comfortable fit to the absorbent article 1 even at the hips.

Even if the 1 st bend guide portion 40 protrudes along the femoral groove in this way, the plurality of 2 nd bend guide portions 43 are formed in the rear region S3 along the width direction W, so the rear region S3 of the absorbent article can be bent along the roundness of the buttocks of the wearer. This allows the wearer to have a more comfortable fit over the buttocks.

Fig. 8 shows a state in which the wearer wearing the absorbent article 1 stands. The 1 st region R1 of the absorbent article 1 is fixed to the crotch portion of underwear (the portion facing the crotch region of the wearer) by the 1 st body adhesive region 61. The 2 nd region R2 of the absorbent article 1 is fixed to the rear part of the crotch portion of underwear (the part facing the hip of the wearer) by the 2 nd body adhesive region 62. In a state where the wearer stands, the hip of the wearer is swollen.

Fig. 9 is a state in which the sectional view shown in fig. 8 is rotated by 90 degrees, and shows a state in which the wearer lies on the back. While the body of the wearer is pressed by the bedding in the state where the wearer lies on the back, fig. 9 shows a virtual state where the body of the wearer is not pressed by the bedding for the convenience of explanation. A line LB representing bedding is illustrated in fig. 9. The region where the line LB of the bedding overlaps the body is a region where the body is pressed by the bedding and deformed in a state where the body lies.

Fig. 10 shows a state in which the body of the wearer lying on his back is deformed by being pressed by bedding. In the state shown in fig. 10, the region where the body overlaps the line of the bedding deforms in fig. 9. More specifically, the swelling deformation of the buttocks of the wearer makes a part of the buttocks of the wearer a flat shape. The deformed portion of the hip moves toward the crotch side (left direction in fig. 10), and swells from the root of the leg toward the toe side. The 2 nd bending portion 41b is disposed at the end of the deformed portion of the buttocks on the buttocks side, and the 1 st bending portion 41a is disposed at the end of the deformed portion of the buttocks on the crotch side. Therefore, the 1 st intermediate region 41 of the absorbent article deforms along the swollen and deformed portion of the buttocks and is disposed along the deformed portion of the buttocks.

The center of the excretory opening contact region S1 in the front-rear direction is positioned to face the excretory opening of the wearer. The deformation starting point of the 1 st bend portion 41a and the deformation starting point of the 2 nd bend portion 41b are formed at positions that contact the buttocks of the wearer at the rear of the excretory opening. Thus, when the buttocks are swollen and deformed, the absorbent article 1 is deformed flexibly in accordance with the deformation of the buttocks. This can maintain the absorbent article 1 in a state of being fitted to the body in the lying posture.

(3) Effect of action

The absorbent article according to one embodiment is provided with the 1 st bent portion 41a extending in the width direction behind the excretory opening contact region S1 and the 2 nd bent portion 41b extending in the width direction W at a position behind the 1 st bent portion 41 a. The 1 st bent portion 41a and the 2 nd bent portion 41b are configured to be able to bend the absorbent article in the thickness direction. A 1 st region R1 adjacent to the 1 st bend 41a in front of the 1 st bend 41a, a 2 nd region R2 adjacent to the 2 nd bend 41b in rear of the 2 nd bend 41b, and a 1 st intermediate region 42 located between the 1 st bend 41a and the 2 nd bend 41b in the front-rear direction L are provided. The weight per unit area of the absorbent material of the 1 st intermediate region 41 is smaller than the weight per unit area of the absorbent material of the 1 st region R1 and the 2 nd region R2. The 1 st bend 41a, the 2 nd bend 41b, and the 1 st intermediate region 41 extend from the centerline CL across the midpoint in the width direction between the outer edge of the absorbent core and the centerline. The length of the 1 st intermediate region 41 in the front-rear direction L is 10mm to 40 mm.

Since the 1 st intermediate region 41 is a region in which the weight per unit area of the absorbent material is small, the external force applied to the absorbent article can be absorbed (released). Such a region extends to the left and right over the center line CL of the absorbent article to more than half the length of the absorbent article 1, and the 1 st intermediate region 41 can deform so as to release the external force applied to the absorbent article when the absorbent article receives a force rotating to the left and right or a force moving to the left and right. Further, even in the position in which the wearer lies, the 1 st intermediate region 41 can be deformed so as to release the force pressing the absorbent article due to the protrusion of the buttocks accompanying the deformation of the buttocks of the wearer.

Further, since the length of the flexibly deformable 1 st intermediate region 41 in the front-rear direction L is long, even when the absorbent article receives external forces from various directions during movement of the wearer, the excretory opening contact region S1 and the rear region S3 can be independently deformed, and the state in which the excretory opening contact region S1 and the rear region S3 are respectively fitted to the body of the wearer can be maintained.

Fig. 11 shows the absorbent article when it receives a force to contract in the front-rear direction L. As described above, the 1 st intermediate region 41 has a large length in the front-rear direction, and therefore can be deformed so that the absorbent core in the rear side region S3 overlaps the absorbent core in the excretory opening contact region S1. Further, the absorbent core in the rear side region S3 can be deformed so as to overlap with the absorbent core in the excretory opening contact region S1.

Fig. 12 shows a case where the rear region S3 of the absorbent article receives a force that rotates left and right about the center of the excretory opening contact region S1. In this state, since the 1 st intermediate region 41 has a large length in the front-rear direction, the rear region S3 can be deformed so as to rotate leftward and rightward by a predetermined angle with the drain contact region S1 as a base point.

Further, since the 1 st intermediate region 41 has a large length in the front-rear direction, the rear region S3 of the absorbent article 1 can also be deformed so as to rotate about the rotation axis CL in fig. 5 independently of the excretory opening contact region S1.

When the wearer turns or walks, the rear region S3 receives a force of rotation or a force of lateral movement with respect to the excretory opening contact region S1 in accordance with the movement of the legs and buttocks. According to the absorbent article having the above configuration, the rear side region S3 can move independently of the excretory opening contact region S1 in response to the force. As a result, even while the wearer is moving, both the excretory opening contact region S1 and the rear region S3 can be continuously fitted to the wearer. This gives the wearer a sense of reassurance and a good wearing comfort.

Since the length of the 1 st intermediate region 41 in the front-rear direction L is 10mm or more, the absorbent article can sufficiently absorb the swollen and deformed portions of the buttocks at the position of the 1 st intermediate region 41. Further, since the length of the 1 st intermediate region 41 in the front-rear direction is sufficiently long, the excretory opening contact region S1 and the rear region S3 are easily deformed independently during the wearer 'S motion, and the state in which each of the excretory opening contact region S1 and the rear region S3 is fitted to the body is easily maintained even during the wearer' S motion.

According to one embodiment, the length of the 1 st intermediate region 41 in the front-rear direction L is 40mm or less. This can suppress the feeling of uneasiness in the absorbency and provide an absorbent article having excellent wearing comfort (see also comparative evaluation described later).

According to one embodiment, the length of the 1 st intermediate region 41 in the front-rear direction L is longer than the thickest region of the absorber of the portion adjacent to the 1 st bend 41a in the 1 st region R1 and the absorber of the portion adjacent to the 2 nd bend 41b in the 2 nd region R2. This makes it easier to deform the absorbent core in the rear region S3 so as to overlap the absorbent core in the excretory opening contact region S1.

According to one embodiment, the 1 st bend 41a, the 2 nd bend 41b, and the 1 st intermediate region 41 extend from one end to the other end of the absorbent core in the width direction W. This facilitates deformation so that the absorbent core in the rear side region S3 overlaps the absorbent core in the excretory opening contact region S1 (see fig. 11). Further, the rear region S3 is easily deformed so as to be rotated leftward and rightward by a predetermined angle with the drain port contact region S1 as a base point (see fig. 12).

According to one embodiment, the distance X between the center of the 1 st bent portion 41a in the width direction W and the center of the excretory opening abutment region S1 in the front-rear direction L is 25mm to 80 mm. As a result of various investigations, the inventors of the present application have found that the deformation starting point of the crotch side of the hip portion is often located more rearward than the center of the excretory opening contact region S1 by 25mm or more in the front-rear direction L. Thus, when the distance X between the center of the 1 st bending portion 41a in the width direction W and the center of the excretory opening contact region S1 in the front-rear direction L is 25mm or more, the 1 st bending portion 41a or the 1 st intermediate region 41 is positioned at the deformation starting point of the crotch side of the hip portion. In order to prevent the 1 st bend portion 41a and the 1 st intermediate region 41 from being located at the portion where the body pressure of the buttocks is the maximum, it is preferable that the distance X between the center in the width direction W of the 1 st bend portion 41a and the center in the front-rear direction L of the excretory opening contact region S1 be 80mm or less. This reduces the discomfort of the wearer.

According to one embodiment, the 1 st bent portion 41a and the 2 nd bent portion 41b are bent in a rearward convex shape in a plan view. The backward convexly curved portion bulges backward together with the underwear when lying on the back, and is pressed out in a direction separating from the body. When the 1 st bend portion 41a, the 2 nd bend portion 41b, and the 1 st intermediate region 41 are separated from the body, the deformation in the supine state can be absorbed by the 1 st bend portion 41a, the 2 nd bend portion 41b, and the 1 st intermediate region 41. Thus, the 1 st region R1 and the 2 nd region R2 maintain a shape that follows the roundness of the body, and the entire absorbent article is arranged along the roundness of the body. As shown in fig. 5 and 11, in a state where the rear region S3 is standing up with respect to the excretory opening contact region S1 (worn state), the 1 st bend portion 41a and the 2 nd bend portion 41b are curved convexly rearward in a plan view, and the rear region S3 is easily deformed so as to rotate about the center axis CL in fig. 5.

According to one embodiment, the absorbent article 1 includes a non-skin surface sheet 20 provided on the non-skin surface side of the absorbent body. The non-skin-facing sheet 20 is provided with

adhesive regions

61, 62, 63, 64 having an adhesive for fixing the absorbent article 1 to underwear. The non-adhesive region where no adhesive is provided extends from one end to the other end (the region between the adhesive region 61 and the adhesive region 62) in the width direction W of the absorbent article in a region at least partially overlapping the 1 st intermediate region 41. Thus, even if the buttocks of the wearer are protruded and a force from the buttocks is applied to the 1 st intermediate region 41, the 1 st intermediate region 41 can be deformed independently of the underwear to absorb the force. Therefore, the force that is projected by the deformation of the wearer's buttocks is not easily transmitted to the underwear, and the fit of the absorbent article is easily maintained.

According to one embodiment, the side sheet 12 is joined with an extensible member 90 that extends and contracts at least in the front-rear direction L, and an effective length portion Le that exhibits the extensibility and contractibility of the extensible member 90 extends from the 1 st region R1 to the 2 nd region R2 across the 1 st intermediate region 41 in the front-rear direction L. Since the 1 st intermediate region 41 has low rigidity, the 1 st intermediate region 41 is in a state of being contracted in the front-rear direction by the contraction action of the stretchable member 90 in a natural state. Further, since the non-adhesive region where no adhesive is present at the position of the 1 st intermediate region 41, the absorbent article is attached to underwear in a state where the 1 st intermediate region 41 is contracted in the front-rear direction L as a result. When the wearer lifts the underwear, the contracted portion of the 1 st intermediate region 41 is stretched together with the stretching of the underwear. Thus, when the wearer wears the underwear, the 1 st intermediate region 41 is in a stretched state (a state in which wrinkles due to contraction are small), and the wearer can be given a good wearing comfort. In addition, in general, during or after wearing of underwear, a load is applied to the adhesive region by stretching of the underwear, and the absorbent article may be peeled off from the underwear. However, in the present embodiment, since the non-adhesive region where no adhesive is present becomes a region that absorbs a force corresponding to the stretch of the underwear, the absorbent article is inhibited from being peeled off from the underwear by the stretch of the underwear.

According to one embodiment the absorbent article has a hip flap adhesive area 64, which hip flap adhesive area 64 is provided to the hip flap and has an adhesive for fastening the hip flap to the pant. The rear side edge of the effective length part Le of the stretchable member 90 is disposed forward of the rear side edge of the hip panel attachment region 64. Thereby, the stretching force of the stretchable member 90 is not strongly applied to the hip panel attachment region 64. This can prevent the hip flap adhesive regions 64 from being peeled off from the underwear due to the fact that the adhesive force between the hip flap adhesive regions 64 and the underwear is smaller than the stretching force of the stretchable member 90.

According to one embodiment, the absorbent body has the middle-high portion 33 located on the inner side in the width direction than the outer edge of the absorbent body in the excretory opening contact region S1. The thickness of the middle height portion 33 is larger than the thickness of the outer edge of the absorber of the 1 st region R1. The mid-height portion 33 is adjacent to the 1 st bend 41a in the 1 st region R1. When the middle-high portion 33 of the 1 st region R1 is adjacent to the 1 st bend 41a, the difference in rigidity and the difference in thickness between the 1 st region R1 and the 1 st intermediate region 41 become large, thereby forming a more definite deformation starting point. This enables the 1 st intermediate region 41 and the 1 st region R1 to be arranged along the body in different shapes.

According to one embodiment, the absorbent article includes a 1 st compressed portion 81 in which the absorbent body is compressed in the thickness direction. The 1 st compression part 81 is disposed along the outer edge of the mid-height part 33. Thereby, a force from the leg of the wearer is applied to the 1 st compression part 81. The 1 st compressed part 81 serves as a base point of deformation, and the intermediate height part 33 deforms so as to fit under the crotch of the wearer (see fig. 6).

According to one embodiment, in the 1 st intermediate area 41, the non-joined areas where the skin panel 10 is not joined with the core package 32 extend continuously in the width direction. Thus, even if the 1 st intermediate region 41 is flexibly deformed, the degree of freedom of the skin panel 10 with respect to the absorber of the 1 st intermediate region 41 is high, and therefore, the uncomfortable feeling given to the wearer can be suppressed.

According to one embodiment, the core wrap 32 has a 1 st wrap on the skin surface side of the absorbent core 31 and a 2 nd wrap on the non-skin surface side of the absorbent core 31. The 1 st wrap and the 2 nd wrap are joined to each other in a compressed state at the position of the 1 st intermediate region 41 with or without interposing the absorbent core 31 therebetween (see fig. 4). The 1 st intermediate region 41 is a portion that flexibly deforms with the movement of the wearer. Therefore, the 1 st intermediate region 41 and the vicinity thereof become portions where the absorbent core 31 is easily deformed or twisted in accordance with the movement of the wearer. In the present embodiment, at the position of the 1 st intermediate region 41, the 1 st wrap and the 2 nd wrap are joined in a mutually compressed state with or without the absorbent core 31 interposed therebetween. Therefore, the shape of the core wrap 32 can be maintained for a long time, and the fit of the absorbent article can be continuously ensured.

According to one embodiment, the absorbent article has side flaps 3 that extend outward in the width direction from the outer edge of the absorbent body in the width direction W and are foldable during use, and hip flaps 4 that project outward in the width direction in the rear side region S3. At least a part of the 1 st intermediate region 41 is provided between the rear end of the side flap 3 and the front end of the hip flap 4. The area between the side flaps 3 (excretory opening abutment area S1) and the area of the hip flap 4 are areas that are desired to be continuously in close contact with the wearer' S skin. Since the 1 st intermediate region 41 is provided between the region between the side flaps 3 (the excretory opening contact region S1) and the region of the hip flaps 4, the absorbent article can be deformed at the position of the 1 st intermediate region 41 in a state where both the excretory opening contact region S1 and the region of the hip flaps are in close contact with the skin of the wearer.

According to one embodiment, the 1 st bend guide 40 is provided which extends along the center line CL in the rear side region S3 and is configured to be able to bend the absorbent article. The rear region S3 is a position facing the buttocks of the wearer, and the center in the width direction of the rear region S3 faces the groin of the wearer. The 1 st bend guide 40 is provided at the center in the width direction of the rear side region S3, so that when a force is applied to the absorbent article on the inner side in the width direction, the 1 st bend guide 40 is likely to protrude along the wearer' S groin. This makes it possible to provide an absorbent article that fits more easily to the buttocks of the wearer.

According to one embodiment, the 1 st bend guide 40 is connected to the 1 st intermediate region 41. Thus, the 2 nd region R2 is divided into left and right sides with respect to the center line CL. Thus, the portion on the left side of the 2 nd region R2 and the portion on the right side of the 2 nd region R2 are easily deformed independently, which is associated with improvement in fit. Further, since the absorbent in the 2 nd region R2 is suppressed from moving beyond the center line CL, the absorbent can be prevented from being locally concentrated.

According to one embodiment, the 1 st bend guide 40 reaches a position rearward of the center of the rear region S3 in the front-rear direction L. During wearing, the 1 st bend guide 40 protrudes toward the skin side of the wearer. Since the 1 st fold guide 40 extends in the front-rear direction L in the rear side region S3, it is easily fitted along the wearer' S groin.

According to one embodiment, the core wrap 32 has a 1 st wrap on the skin surface side of the absorbent core 31 and a 2 nd wrap on the non-skin surface side of the absorbent core 31. In the 1 st bend guide 40, the non-joined region where the skin sheet 10 and the core pack 32 are not joined extends continuously in the front-rear direction. The 1 st wrap and the 2 nd wrap are joined to each other in a mutually compressed state at the position of the 1 st bend guide 40 with or without interposing the absorbent core 31 therebetween. The 1 st bend guide 40 and its vicinity are portions that are easily deformed as described above. Therefore, the 1 st bend guide 40 and the vicinity thereof become portions where the absorbent core 31 is easily deformed or twisted in accordance with the movement of the wearer. In the present embodiment, at the position of the 1 st bend guide 40, the 1 st wrap and the 2 nd wrap are joined in a mutually compressed state with or without the absorbent core 31 interposed therebetween. Therefore, the shape of the core wrap 32 can be maintained for a long time, and the fit of the absorbent article can be continuously ensured.

According to one embodiment, a pair of length compression portions 82 that compress the absorbent body are provided, extending in the front-rear direction L on both sides thereof with the 1 st bending guide portion 40 interposed therebetween. The pair of length-compressed parts 82 has high rigidity, and therefore serve as base points of deformation of the absorbent core 31. The 1 st bend guide 40 sandwiched between the pair of length-compressed parts 82 is more likely to bulge toward the wearer's body. This makes it possible to provide an absorbent article that has a greater affinity for the body of the wearer and can provide a more comfortable fit to the wearer.

According to one embodiment, the pair of length-compressing portions 82 do not reach the 1 st intermediate area 41. The pair of length-compressed parts 82 are portions having high rigidity. Since the portion having higher rigidity is not formed in the 1 st intermediate region 41, the absorbent article is more likely to be deformed at the position of the 1 st intermediate region 41.

According to one embodiment, the absorbent body has the 2 nd folding guide 43 that extends outward in the width direction W from the 1 st folding guide 40 in the rear side region S3 and is configured to be able to bend the absorbent article. The 2 nd bend guide portion 43 forms a deformation base point extending in the width direction W. Since the absorbent core 31 in the back region S3 can be deformed with the 2 nd bend guide portion 43 as a base point, the absorbent article 1 can be more easily fitted along the roundness in the front-back direction L of the body. In particular, when the 1 st bending guide 40 protrudes along the femoral groove as shown in fig. 5, it may be difficult to deform the posterior region S3 along the roundness in the front-back direction L of the body. Even in this case, the rear region S3 can be easily deformed along the roundness in the front-rear direction L of the body by the 2 nd bending guide portion 43 serving as a deformation base point. This makes it possible to provide an absorbent article that has a greater affinity for the body of the wearer and can provide a more comfortable fit to the wearer.

According to one embodiment, a pair of length compression portions 82 that compress the absorbent body are provided, extending in the front-rear direction L on both sides thereof with the 1 st bending guide portion 40 interposed therebetween. The pair of length-compressing portions 82 are formed at positions of the 2 nd folding guide portion 43 with a space in the front-rear direction L. The pair of length-compressed parts 82 are portions having high rigidity. In this way, since the portions having high rigidity are formed at the positions of the 2 nd bend guide portions 43 with a space therebetween, the absorbent article is more likely to be deformed at the positions of the 2 nd bend guide portions 43.

According to one embodiment, the 1 st bend guide 40 has a 2 nd intermediate region 42 extending along the center line CL and 3 rd

bent portions

42a and 4 th bent portions 42b extending in the front-rear direction L through the 2 nd intermediate region 42. The 3 rd bent portion 42a and the 4 th bent portion 42b are configured to be able to bend the absorbent article in the thickness direction. The weight per unit area of the absorbent in the 2 nd intermediate region 42 is lower than the weight per unit area of the absorbent at the position further outward in the width direction W than the 1 st bend guide 40. Thus, the 1 st bending guide portion 40 is easily bent at the 2 nd intermediate region 42 with the 3 rd bent portion 42a and the 4 th bent portion 42b as the base points. Thereby, the back region S3 is easily fitted to the wearer' S groin.

(4) Absorbent article according to modification

Next, an absorbent article according to a modification will be described with reference to fig. 13. In the description of the absorbent article of the modified example, the description will be given of the structure different from that of the above-described embodiment, and the same reference numerals will be given to the structure same as that of the above-described embodiment, and the description thereof will be omitted.

The absorbent article 1 of the modified example has a compressed portion in which at least the absorbent body 30 is compressed in the thickness direction. The compressed portion is formed by compressing the top sheet 11 and the absorbent body 30 in the thickness direction. The compression unit of the modification includes the 1 st compression unit 81 disposed in the 1 st region R1, the 2 nd compression unit 82 disposed in the 2 nd region R2, and the rear compression unit 84 disposed at a position rearward of the 2 nd compression unit 82.

The length-compressed part 82 is provided on both sides of the rear region S3 with the center line CL therebetween, more specifically, with the 1 st bend guide 40 therebetween. The length compression portion 82 extends in the front-rear direction L. The length compressing portion 82 may extend linearly along the front-rear direction L or may extend curvilinearly at an angle to the front-rear direction L. The length compressed part 82 may be formed at a position on the front side of the position P1 of the maximum width of the hip flap 4. The length-compressed part 82 preferably does not reach the 1 st intermediate region 41.

The pair of rear compression sections 84 are provided in the rear region S3 on both sides thereof with a center line CL therebetween. The rear compression section 84 may be formed by compressing the absorbent body 30 and the top sheet 11 in the thickness direction. The pair of rear compression sections 84 are provided apart from each other with a center line CL passing through the center of the absorbent article in the width direction W. The pair of rear compressing portions 84 may be located on the rear side of the position P1 of the maximum width of the hip flaps 4.

(5) Other embodiments

The absorbent article of the present embodiment is a sanitary napkin for night use, and may be a sanitary napkin for daily use as another embodiment. The sanitary napkin may not include the hip flaps.

While the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description in the present specification is for the purpose of illustration and is not intended to limit the present invention in any way.

(6) Comparative evaluation

Next, a comparative evaluation of the length of the 1 st intermediate region 41 in the front-rear direction L will be described. Table 1 shows the results of comparative evaluation of the length of the 1 st intermediate region 41. In the comparative evaluation test, the absorbent articles of examples 1 to 5 were compared with the absorbent articles of comparative examples 1 to 3, and the state of maintaining the adhesiveness and the feeling of uneasiness in the appearance with respect to the absorbency were evaluated. The absorbent articles of examples 1 to 4 and the absorbent articles of comparative examples 1 to 3 were different in the longitudinal length of the 1 st intermediate region 41, and were identical in all other configurations.

[ TABLE 1 ]

Problem 1 "is to maintain fit compared with a sanitary napkin used at ordinary times". The sensory evaluation of the sample having a proportion of 65% or more of the number of persons who answered "sustainable" in question 1 was good, and evaluated as o. In addition, the sensory evaluation of the sample in which the proportion of the number of persons who answered "can sustain" in question 1 was less than 65% was no good, and the sensory evaluation was x.

Problem 2 "is good wearing comfort (feeling of discomfort) compared with a sanitary napkin used at ordinary times)". The sensory evaluation of the sample having a proportion of 65% or more of the number of persons who answered "very good, better" in question 2 was good, and evaluated as o. Among the samples evaluated as o, the samples having a proportion of the number of persons who responded very well exceeding 20% of the total number of persons evaluated as excellent in wearing comfort were evaluated as excellent.

Problem 3 "is little (or no) uncomfortable feeling in the appearance with respect to absorbency as compared with a sanitary napkin used at ordinary times". The sample in which the proportion of the number of persons who answered "less uneasy feeling" or "no uneasy feeling" in question 2 was 65% or more was evaluated as good in sensory evaluation and evaluated as o. In addition, the sensory evaluation of the sample in which the proportion of the number of persons who answered "less uneasy feeling" or "no uneasy feeling" in question 1 was less than 65% was poor, and x.

The absorbent articles of examples 1 to 4 each had a length of 10mm to 50mm in the front-rear direction of the 1 st intermediate region, and all of the results were good for the maintenance evaluation of the fit, the quality of the wearing comfort, and the evaluation of the uneasy feeling of the absorbency. Further, the absorbent articles of examples 1 to 3 were more excellent in wearing comfort. From these results, it is understood that the length of the 1 st intermediate region in the front-rear direction is preferably 10mm to 40mm, more preferably 10mm to 30 mm. More specifically, it is found that when the length of the 1 st intermediate region in the front-rear direction is 10mm or more, excellent results are obtained with respect to the bonding performance. Further, it is found that when the length of the 1 st intermediate region is 40mm or less, the feeling of incongruity with respect to the absorbency can be suppressed and the wearing comfort is excellent. Further, it is found that the wearing comfort is further excellent when the length of the 1 st intermediate region is 30mm or less. In addition, when the length of the 1 st intermediate region is 50mm, the center of the rear region protrudes too long, which is known to give a wearer a sense of discomfort.

Next, the amount of protrusion of the deformed portion of the hip of the wearer lying on his back to the crotch side was measured. The protruding amount is the distance between the crotch-side end (P1 in fig. 10) of the deformed portion of the buttocks of the wearer in the supine state and the protruding leg-side end (P2 in fig. 10) of the buttocks. The protrusion amount of 5 test subjects was measured. The measurement results are shown in table 2.

[ TABLE 2 ]

	Projection (mm)
		Experimenter 1	20
Experimenter 2	15
		Experimenter 3	25
Experimenter 4	30
		Experimenter 5	10

The measurement results revealed that the amount of hip protrusion was 10mm to 30 mm. From this, it is understood that when the length of the 1 st intermediate region in the front-rear direction is 10mm or more, the bulge from the crotch-side end of the deformed portion of the hip of the wearer to the protruding leg-side end of the hip can be covered. Further, if the length of the 1 st intermediate region 41 in the front-rear direction is about 30mm, the force applied to the absorbent article by the protrusion of the buttocks can be more reliably released by the 1 st bending guide 40. When the individual difference in the wearing position of the absorbent article is also taken into consideration, the length of the 1 st intermediate region 41 in the front-rear direction is preferably 40mm or less as shown in the above test results.

The entire contents of the japanese invention patent application No. 2015-219128 filed on 11/9/2015 are incorporated herein by reference.

Industrial applicability

An absorbent article which can be easily and continuously brought into close contact with the body of a wearer even when the wearer moves and which has excellent wearing comfort can be provided.

Description of the reference numerals

1. An absorbent article; 3. a side wing; 4. a hip flap; 10. a skin patch; 20. a non-skin patch; 30. an absorbent body; 31. an absorbent core; 32. a core bag body; 33. a mid-high section; 40. a 1 st bend guide portion; 41. 1 st middle area; 41a, 1 st bend; 41b, 2 nd bend; 42. 2 nd middle area; 42a, 3 rd bend; 42b, 4 th bend; 43. a 2 nd bending guide part; 61. 1 st body bonding area; 62. 2 nd main body bonding area; 81. a front-side compression section; 82. a length compression section; l, the front-back direction; w, width direction; t, the thickness direction; s1, a drain port contact region; s2, front side area; s3, the posterior region; CL, center line.

Claims

1. An absorbent article having:

a front-back direction and a width direction orthogonal to each other;

an excretory opening abutment region opposed to an excretory opening of the wearer;

a rear region located on a rear side of the drain port abutment region; and

an absorbent body which is disposed at least in the excretory opening contact region and the back region and which has an absorbent core comprising an absorbent material,

the absorbent article is provided with a 1 st bending portion extending in the width direction at the rear of the excretory opening contact region and a 2 nd bending portion extending in the width direction at a position rearward of the 1 st bending portion,

the 1 st bent portion and the 2 nd bent portion are configured to be able to bend the absorbent article in a thickness direction,

the absorbent article is provided with a 1 st region adjacent to the 1 st bend portion in front of the 1 st bend portion, a 2 nd region adjacent to the 2 nd bend portion in rear of the 2 nd bend portion, and a 1 st intermediate region located between the 1 st bend portion and the 2 nd bend portion in the front-rear direction,

the weight per unit area of the absorbent material of the 1 st intermediate region is smaller than the weight per unit area of the absorbent material of the 1 st region and is smaller than the weight per unit area of the absorbent material of the 2 nd region,

the 1 st bend portion, the 2 nd bend portion, and the 1 st intermediate region extend in the width direction from a centerline connecting the widthwise centers of the absorbent articles across an intermediate point between an outer edge of the absorbent core and the centerline,

the length of the 1 st intermediate region in the front-rear direction is 10mm to 40mm,

the absorbent article has a non-skin surface sheet provided on the non-skin surface side of the absorber,

the non-skin surface sheet is provided with an adhesive area having an adhesive for fixing the absorbent article to underwear,

a non-adhesive region not provided with the adhesive extends from one end to the other end in the width direction of the absorbent article in a region at least partially overlapping the 1 st intermediate region,

the absorptive article has a skin surface sheet provided on the skin surface side of the absorptive body,

the skin-facing sheet includes a top sheet covering the absorber and a side sheet extending outward in the width direction from an end region in the width direction of the top sheet,

an extensible member that extends and contracts at least in the front-rear direction is joined to the side sheet,

an effective length portion of the stretchable member exhibiting stretchability extends from the 1 st region to the 2 nd region across the 1 st intermediate region in the front-rear direction,

the absorbent article has:

a hip flap projecting outward in the width direction in the rear region; and

a hip flap adhesive area provided on the hip flap and having an adhesive for fixing the hip flap to underwear,

the rear side edge of the effective length portion of the stretchable member is disposed at a position forward of the rear side edge of the hip panel attachment region,

the 1 st bent portion and the 2 nd bent portion are curved in a rearward convex shape in a plan view.

2. The absorbent article of claim 1,

the length of the 1 st intermediate region in the front-rear direction is longer than the thickness of the thickest part of the absorbent body in the portion of the 1 st region adjacent to the 1 st bend and the absorbent body in the portion of the 2 nd region adjacent to the 2 nd bend.

3. The absorbent article of claim 1,

the 1 st bend, the 2 nd bend, and the 1 st intermediate region extend from one end to the other end of the absorbent core in the width direction.

4. The absorbent article of claim 1,

a distance between the center of the 1 st bend portion in the width direction and the center of the excretory opening contact region in the front-rear direction is 25mm to 80 mm.

5. The absorbent article of claim 1,

the absorbent body has a middle-high portion located at the inner side of the outer edge of the absorbent body in the width direction in the excretory opening contact region,

the thickness of the middle high part is thicker than that of the outer edge of the absorber of the 1 st area,

the mid-height portion is adjacent to the 1 st bend in the 1 st region.

6. The absorbent article according to claim 5,

the absorptive article is provided with a 1 st compression part formed by compressing the absorptive body in the thickness direction,

the 1 st compression part is disposed along an outer edge of the mid-height part.

7. The absorbent article of claim 1,

the absorbent article has:

a skin surface sheet provided on the skin surface side of the absorber; and

a core wrap that encases the absorbent core,

in the 1 st intermediate region, the non-bonded region where the skin panel is not bonded to the core package extends continuously in the width direction.

8. The absorbent article of claim 1,

the absorbent article has a core wrap enclosing the absorbent core,

the core wrap has a 1 st wrap portion on the skin surface side of the absorbent core and a 2 nd wrap portion on the non-skin surface side of the absorbent core,

the 1 st wrap and the 2 nd wrap are joined in a state of being compressed with or without interposing the absorbent core therebetween at the position of the 1 st intermediate region.

9. The absorbent article of claim 1,

the absorbent article is provided with a 1 st bending guide portion extending along the center line in the rear region and configured to be capable of bending the absorbent article.

10. The absorbent article of claim 9,

the 1 st bend guide portion is connected to the 1 st intermediate region.

11. The absorbent article of claim 9,

the 1 st bend guide portion reaches a position rearward of the center in the front-rear direction of the rearward region.

12. The absorbent article of claim 9,

the absorbent article has:

a skin surface sheet provided on the skin surface side of the absorber; and

a core wrap that encases the absorbent core,

a non-joining region where the skin surface sheet and the core package do not join with each other continuously extends in the front-rear direction at the 1 st bend guide,

the 1 st wrap portion and the 2 nd wrap portion are joined in a state of being compressed with or without interposing the absorbent core therebetween at the position of the 1 st bend guide portion.

13. The absorbent article of claim 9,

the absorbent article is provided with a pair of lengthwise compressing sections which extend in the front-rear direction on both sides of the absorbent body with the 1 st folding guide section interposed therebetween and compress the absorbent body.

14. The absorbent article of claim 13,

the pair of length compressing parts does not reach the 1 st intermediate region.

15. The absorbent article of claim 9,

the absorbent body has a 2 nd folding guide portion extending outward in the width direction from the 1 st folding guide portion in the rear region and configured to enable the absorbent article to be bent.

16. The absorbent article of claim 15,

the absorbent article is provided with a pair of length compressing sections which extend in the front-rear direction on both sides thereof with the 1 st folding guide section interposed therebetween and compress the absorbent body,

the pair of length-compressed parts are formed at the position of the 2 nd bending guide part with a space in the front-rear direction.

17. The absorbent article of claim 9,

the 1 st bend guide portion has a 2 nd intermediate region extending along the center line and 3 rd and 4 th bend portions extending in the front-rear direction with the 2 nd intermediate region interposed therebetween,

the 3 rd bent portion and the 4 th bent portion are configured to be able to bend the absorbent article in a thickness direction,

the absorbent material in the 2 nd intermediate region has a lower weight per unit area than the absorbent material at a position further outward in the width direction than the 1 st bend guide.