CN112752558B

CN112752558B - Absorbent article

Info

Publication number: CN112752558B
Application number: CN201980062200.0A
Authority: CN
Inventors: 高阪翔士; 山本纯子; 铃木智子
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2018-09-28
Filing date: 2019-09-09
Publication date: 2022-07-12
Anticipated expiration: 2039-09-09
Also published as: KR20210068015A; KR102480172B1; WO2020066574A1; CN112752558A

Abstract

An absorbent article (1) for more reliably limiting rewet while maintaining excellent skin feel, comprising: a liquid-permeable top sheet (2) comprising water-retentive fibers; a liquid-impermeable back sheet (3); an absorber (4) disposed between the top sheet and the back sheet, and containing pulp; and an auxiliary sheet (5) which is disposed between the top sheet and the absorber and contains thermoplastic resin fibers. The auxiliary sheet includes: a first portion (51); and a pair of second portions (52, 52) that are connected to the first portions via a pair of folded portions (5f, 5f) that are separated from each other in the width direction (W) of the absorbent article and that extend in the longitudinal direction (L) of the absorbent article. The pair of second portions are folded along the corresponding folded portions, respectively, and are folded toward the absorbent body side or the topsheet side with respect to the first portions and overlap with the first portions.

Description

Absorbent article

Technical Field

The present disclosure relates to absorbent articles.

Background

An absorbent article is known, which includes: a liquid-permeable top sheet comprising water-retentive fibers such as cotton; a liquid impermeable backsheet; an absorber disposed between the top sheet and the back sheet and containing pulp; and an auxiliary sheet disposed between the top sheet and the absorbent body and containing thermoplastic resin fibers (see, for example, patent document 1). When the top sheet contains cotton, the touch of the wearer's skin is improved.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2009-148328

Disclosure of Invention

Problems to be solved by the invention

However, for example, when a pressure is applied to the absorbent body due to the movement of the wearer, there is a possibility that liquid such as urine absorbed by the absorbent body may leak out from the absorbent body. However, since cotton contained in the top sheet has excellent water absorbency, there are problems as follows: the liquid exuded from the absorbent body is sucked up by the top sheet, and may reach the skin side of the top sheet, so-called rewet.

Means for solving the problems

In accordance with the present disclosure, the following is disclosed.

[ Structure 1]

An absorbent article having a plurality of absorbent layers,

the absorbent article is provided with:

a liquid permeable top sheet comprising water-retentive fibers;

a liquid impermeable backsheet;

an absorber disposed between the top sheet and the back sheet, and containing pulp; and

an auxiliary sheet disposed between the top sheet and the absorbent body and containing thermoplastic resin fibers,

it is characterized in that the preparation method is characterized in that,

the auxiliary sheet includes: a first portion; and a pair of second portions respectively connected to the first portions via a pair of folded portions that are separated from each other in the width direction of the absorbent article and respectively extend in the longitudinal direction of the absorbent article,

the pair of second portions are folded toward the side of the absorber or the side of the top sheet with respect to the first portion along the corresponding folded portions, respectively, and overlap with the first portion.

According to the structure 1, a space surrounded by the auxiliary sheet is formed between the top sheet and the absorbent body, and liquid can be held in the space. Further, since the pair of second portions are folded on the same side as the first portions, a space for holding liquid can be formed larger and more reliably. Therefore, the rewetting can be more reliably restricted while maintaining an excellent skin feel.

[ Structure 2]

The absorbent article according to structure 1, characterized in that,

the absorbent article comprises a skin-side layer and a non-skin-side layer formed by laminating the top sheets, wherein the water-retentive fiber content ratio of the skin-side layer is higher than the water-retentive fiber content ratio of the non-skin-side layer.

According to the structure 2, the excellent skin feeling is maintained by the skin-side layer, and the liquid is reliably made to flow toward the absorbent body by the non-skin-side layer.

[ Structure 3]

The absorbent article according to structure 2, characterized in that,

the water-retentive fiber content of the skin side layer was 100%.

According to the structure 3, more excellent skin feeling can be provided.

[ Structure 4]

The absorbent article according to any one of structures 1 to 3,

the auxiliary sheet has an inner side sheet and an outer side sheet which are overlapped with each other.

According to the structure 4, a space capable of holding liquid is also formed between the inner sheet and the outer sheet. Therefore, rewetting can be more reliably restricted.

[ Structure 5]

The absorbent article according to structure 4, characterized in that,

the absorbent article further includes a super absorbent polymer disposed between the inner sheet and the outer sheet.

According to the structure 5, the absorption capacity of the absorbent article is further improved.

[ Structure 6]

The absorbent article according to any one of structures 1 to 5,

the pair of second portions do not overlap each other.

According to the configuration 6, since the communication path to the space capable of holding the liquid is formed, the liquid is easily guided into the space capable of holding the liquid via the communication path.

[ Structure 7]

The absorbent article according to any one of structures 1 to 6,

the pair of second portions is folded toward the side of the absorbent body with respect to the first portion.

According to the structure 7, the flow of liquid from the space capable of holding liquid toward the top sheet is restricted by the first portion.

[ Structure 8]

The absorbent article according to any one of structures 1 to 7,

the absorbent article further includes a heat-fused portion which joins at least the top sheet and the back sheet to each other by heat fusion and is provided continuously along a periphery of the absorbent article,

the absorbent article is divided into a first region located on the inner side in the width direction of the absorbent article and a second region located on the outer side in the width direction than the first region,

the rigidity of the heat-welded portion in the second region is lower than that of the heat-welded portion in the first region.

According to the structure 8, since the auxiliary sheet including the thermoplastic resin fiber is heat-welded, it is possible to further improve the bondability of the heat-welded portion while maintaining an excellent skin feeling. Further, since the rigidity of the heat-fused portion located in the second region of the absorbent article is low, it is possible to restrict the feeling of discomfort that the heat-fused portion may give to the wearer. Meanwhile, since the rigidity of the heat-welded portion located in the first region and the rigidity of the heat-welded portion located in the second region are different from each other, a dividing line that divides the first region and the second region from each other is a bending start point, and the second region can be easily moved relative to the first region. Therefore, the absorbent article is more reliably kept in contact with the skin of the wearer.

[ Structure 9]

The absorbent article according to structure 8, characterized in that,

the heat-fused portion in the first region joins the top sheet and the bottom sheet to each other together with the auxiliary sheet,

the heat-welded portion located in the second region joins the topsheet and the backsheet to each other without including the auxiliary sheet.

According to the structure 9, the heat-welded portion having low rigidity and the heat-welded portion having high rigidity can be realized with a simple structure.

[ Structure 10]

The absorbent article according to

structure

8 or 9, characterized in that,

a dividing line that divides the first region and the second region from each other is a straight line parallel to a longitudinal direction of the absorbent article.

According to the structure 10, since the second region is folded parallel to the longitudinal direction of the absorbent article, the absorbent article more reliably continues to be attached to the skin of the wearer.

[ Structure 11]

The absorbent article according to any one of structures 8 to 10,

a dividing line that divides the first region and the second region from each other extends along an outer end of the auxiliary sheet in the width direction.

According to the structure 11, the rigidity of the heat-welded portion located in the first region and the rigidity of the heat-welded portion located in the second region are adjusted with a simple structure.

[ Structure 12]

The absorbent article according to any one of structures 8 to 11,

the water-retentive fiber content of the top sheet is 40% or more.

According to the structure 12, more excellent skin feeling can be provided.

[ Structure 13]

The absorbent article according to any one of structures 8 to 12,

the absorbent contains 10 mass% or more of a super absorbent polymer.

According to the structure 13, an absorbent article suitable for an incontinence pad, particularly a light incontinence pad, can be provided.

Effects of the invention

It is possible to more reliably restrict rewetting while maintaining an excellent skin feel.

Drawings

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

Fig. 2 is a schematic sectional view taken along line II-II of fig. 1.

Fig. 3 is a schematic cross-sectional view of a topsheet based on embodiments of the present disclosure.

Fig. 4(a) - (D) are schematic side views for explaining the configuration of the auxiliary sheet based on the embodiment of the present disclosure.

Fig. 5 is a schematic cross-sectional view similar to fig. 2 of an absorbent article according to another embodiment of the present disclosure.

Fig. 6 is a plan view of an absorbent article according to still another embodiment of the present disclosure.

Fig. 7 is a schematic sectional view taken along line VII-VII of fig. 6.

Fig. 8 is a schematic sectional view taken along line VIII-VIII of fig. 6.

Fig. 9 is a schematic partial top view of an absorbent article according to yet another embodiment of the present disclosure.

Fig. 10 is a schematic longitudinal end view of an absorbent article according to still another embodiment of the present disclosure.

Detailed Description

Fig. 1 and 2 show a plan view and a schematic cross-sectional view of an absorbent article 1 according to an embodiment of the present disclosure, respectively. The absorbent article 1 according to the embodiment of the present disclosure is constituted by a light incontinence pad. In another embodiment (not shown) according to the present disclosure, the absorbent article 1 is configured by, for example, a panty liner, a sanitary napkin, a disposable diaper, or the like. In the drawings, reference numeral L, W, T denotes the longitudinal direction, the width direction, and the thickness direction of the absorbent article 1, respectively. In fig. 1, reference symbol CL denotes a longitudinal direction L center line, and reference symbol CW denotes a width direction W center line. The absorbent article 1 according to the embodiment of the present disclosure is symmetrical about the longitudinal center line CL and the width center line CW, respectively.

Referring to fig. 1 and 2, an absorbent article 1 according to an embodiment of the present disclosure includes: a liquid-permeable top sheet 2 comprising water-retentive fibers; a liquid-impermeable back sheet 3; an absorbent body 4 disposed between the top sheet 2 and the back sheet 3 and containing pulp; and an auxiliary sheet 5 disposed between the top sheet 2 and the absorbent body 4, and containing thermoplastic resin fibers. The absorbent article 1 according to the embodiment of the present disclosure further includes another auxiliary sheet 6 that is disposed between the top sheet 2 and the auxiliary sheet 5 and includes thermoplastic resin fibers. These topsheet 2, backsheet 3, absorbent body 4, auxiliary sheet 5 and another auxiliary sheet 6 are laminated on each other in the thickness direction T. In the embodiment based on the present disclosure, the topsheet 2 and the backsheet 3 are substantially the same size as each other in the longitudinal direction L and the width direction W. In the embodiment according to the present disclosure, the absorbent body 4, the auxiliary sheet 5, and the other auxiliary sheet 6 are smaller than the top sheet 2 and the back sheet 3 in the longitudinal direction L and the width direction W.

The absorbent article 1 according to the embodiment of the present disclosure further includes a pair of

side sheets

7, 7 extending in the longitudinal direction L at both ends in the width direction W of the absorbent article 1. The

side sheets

7 and 7 according to the embodiment of the present disclosure are provided so as to sandwich the top sheet 2 and the back sheet 3, respectively. The

side sheets

7 and 7 according to the embodiment of the present disclosure each include an elastic member 7e in an extended state in the longitudinal direction L. In the embodiment shown in fig. 2, the elastic member 7e contains 2 rubber threads.

The absorbent article 1 according to the embodiment of the present disclosure further includes: a pressure-sensitive adhesive part 8 provided on the back sheet 3 on the side opposite to the top sheet 2; and a separator 9 covering the adhesive portion 8. The adhesive portion 8 according to the embodiment of the present disclosure is formed of a plurality of adhesive tapes separated from each other in the width direction W and extending in the longitudinal direction L, respectively. The adhesive part 8 is used to fix the absorbent article 1 to underwear or the like of a wearer.

In fig. 2, the dotted line indicates a layer of the adhesive. That is, in the embodiment shown in fig. 2, adhesive layers are provided between the top sheet 2 and the other auxiliary sheet 6, between the other auxiliary sheet 6 and the auxiliary sheet 5, between the auxiliary sheet 5 and the absorbent body 4, between the absorbent body 4 and the backsheet 3, and between the

side sheets

7, 7 and the top sheet 2 and the backsheet 3. Examples of the adhesive include hot melt adhesives.

As shown in fig. 1, the absorbent article 1 according to the embodiment of the present disclosure further includes a plurality of embossed

portions

10, 11, and 11. In the embodiment according to the present disclosure, the

embossed portions

10 and 10 are provided along a curve that is convex toward the width direction center line CW, and the

embossed portions

11 and 11 are provided along a curve that is concave toward the longitudinal direction center line CL. In addition, the

embossed portions

10, 11 according to the embodiment of the present disclosure are recessed in the thickness direction T from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4, respectively. The

embossed portions

10, 11 are formed by thermal welding, for example. In addition, the

embossed portions

10, 11 are not depicted in fig. 2 for clarity.

As shown in fig. 3, the top sheet 2 according to the embodiment of the present disclosure includes a skin-side layer 2a and a non-skin-side layer 2b laminated to each other in the thickness direction T. The skin-side layer 2a can be in contact with the skin of the wearer. The non-skin side layer 2b does not contact the skin of the wearer. The skin-side layer 2a and the non-skin-side layer 2b according to the embodiment of the present disclosure are each formed of a sheet-shaped nonwoven fabric. The skin-side layer 2a and the non-skin-side layer 2b according to the embodiment of the present disclosure are joined to each other by being interlaced. Examples of interlacing include hydroentangling, water jet, and hot air. In addition, in the embodiment based on the present disclosure, the top sheet 2 is formed of 2 layers. In another embodiment (not shown) based on the present disclosure, the top sheet 2 is formed of 1 layer or 3 layers or more.

The skin-side layer 2a according to the embodiment of the present disclosure does not include thermoplastic resin fibers but includes water-retentive fibers. In another embodiment (not shown) based on the present disclosure, the skin-side layer 2a includes water-retentive fibers and thermoplastic resin fibers. In addition, the non-skin side layer 2b according to the embodiment of the present disclosure includes water-retentive fibers and thermoplastic resin fibers. In another embodiment (not shown) according to the present disclosure, the non-skin side layer 2b does not include water-retentive fibers but includes thermoplastic resin fibers. The water-retentive fibers have the property of absorbing and retaining water. On the other hand, the thermoplastic resin fibers have properties that they are hardly fused with water or hardly retain water, and for example, have properties that the contact angle with ion-exchanged water (exemplified by a specific resistance value of 10 M.OMEGA.. multidot.cm) is about 80 to 100 degrees.

Examples of the components of the water-retentive fibers according to the embodiments of the present disclosure include cellulose-based fibers. Examples of the cellulose-based fibers include natural cellulose fibers, regenerated cellulose fibers, refined cellulose fibers, and semi-synthetic cellulose fibers. Examples of natural cellulose fibers include plant fibers. Examples of plant fibers include seed hair fibers, bast fibers, vein fibers, fruit fibers. An example of seed wool fibers includes cotton. Examples of bast fibers include hemp. Examples of vein fibers include manila hemp. Examples of fruit fibers include coconut. Examples of cotton include upland cotton (gossypium hirsutum), island cotton (gossypium barbadense), tree cotton (gossypium arboreum) and grass cotton (gossypium herbaceum). Examples of Upland cotton include fine cotton (Upland cotton). Examples of cotton include organic cotton, POC (trademark), and non-organic cotton. The Organic cotton is cotton certified by GOTS (Global Organic Textile Standard). Examples of regenerated cellulose fibers include rayon. Examples of rayon include viscose rayon obtained from viscose, tiger kapok, modal, and cuprammonium rayon (also known as "cuprammonium fibers") obtained from a cuprammonium solution of cellulose. Examples of the refined cellulose fibers include Lyocell (Lyocell), and specifically, include fibers obtained by dissolving pulp in an aqueous solution of N-methylmorpholine N-oxide to prepare a dope (dope), and extruding the pulp into a dilute solution of N-methylmorpholine N-oxide. Purified cellulose is commercially available, for example, as TENCEL (trademark). Examples of the semi-synthetic cellulose fibers include semi-synthetic cellulose. Examples of semi-synthetic celluloses include cellulose acetate fibers. Examples of cellulose acetate fibers include triacetylcellulose and diacetylcellulose. Among them, natural cellulose fibers are preferable, cotton is more preferable, and upland cotton is further preferable from the viewpoint of water retentivity and skin touch.

Examples of the components of the thermoplastic resin fiber according to the embodiment of the present disclosure include olefin-based resins, polyester-based resins, and polyamide-based resins. Examples of the olefin-based resin include Polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA). Examples of the polyester-based resin include polyethylene terephthalate (PET) and polylactic acid (PLA). Examples of the polyamide resin include polyamide resins such as 6-nylon. Examples of the structure of the thermoplastic resin fiber include a conjugate fiber, a hollow fiber, a profiled fiber, a three-dimensional crimped fiber, and a split fiber. Examples of the composite fiber include a core-sheath type fiber, a side-by-side type fiber, and an island/sea type fiber. Examples of the shaped section fiber include a flat section fiber, a Y-section fiber, and a C-section fiber. Examples of the three-dimensional crimped fibers include latent crimped fibers and apparent crimped fibers.

In the embodiment based on the present disclosure, the water-retentive fiber content ratio of the skin-side layer 2a is higher than the water-retentive fiber content ratio of the non-skin-side layer 2 b. In particular, in the embodiment according to the present disclosure, the water-retentive fiber content of the skin-side layer 2a is 100% by mass. The water-retentive fiber content ratio of a certain layer is expressed as the mass of the water-retentive fibers contained in the layer relative to the total mass of the layer.

The backsheet 3 according to the embodiment of the present disclosure is formed of a liquid impermeable nonwoven fabric, a synthetic resin film, a composite sheet of a nonwoven fabric and a synthetic resin film, or an SMS nonwoven fabric.

The absorbent body 4 according to the embodiment of the present disclosure does not contain a Super Absorbent Polymer (SAP) but contains pulp. The absorbent body 4 according to the embodiment of the present disclosure is formed of a sheet-like nonwoven fabric. Such an absorbent body 4 is also called a crepe paper. In another embodiment (not shown) based on the present disclosure, the absorbent body 4 contains pulp and a super absorbent polymer. Examples of the super absorbent polymer based on the embodiment of the present disclosure include starch-based, acrylic or amino acid-based, particulate or fibrous super absorbent polymers.

The auxiliary sheet 5 according to the embodiment of the present disclosure includes an inner sheet 5i and an outer sheet 5o that are overlapped with each other. In another embodiment (not shown) according to the present disclosure, the auxiliary sheet 5 includes a single sheet. In another embodiment (not shown) of the present disclosure, the auxiliary sheet 5 includes 3 or more sheets that are overlapped with each other. The inner sheet 5i and the outer sheet 5o according to the embodiment of the present disclosure are each formed of a sheet-shaped nonwoven fabric. The inner sheet 5i and the outer sheet 5o according to the embodiment of the present disclosure do not contain water-retentive fibers and contain thermoplastic resin fibers. In another embodiment (not shown) according to the present disclosure, the inner sheet 5i and the outer sheet 5o each include water-retentive fibers and thermoplastic resin fibers. In addition, the inner and outer side sheets 5i and 5o according to the embodiment of the present disclosure are identical to each other. In another embodiment (not shown) according to the present disclosure, the inner sheet 5i and the outer sheet 5o are different from each other. Further structure of the auxiliary sheet 5 according to the embodiment of the present disclosure will be described later.

Another auxiliary sheet 6 according to the embodiment of the present disclosure is formed of a sheet-shaped nonwoven fabric. In addition, the auxiliary sheet 6 according to the embodiment of the present disclosure includes not the water-retentive fibers but the thermoplastic resin fibers. In another embodiment (not shown) according to the present disclosure, the other auxiliary sheet 6 includes water-retentive fibers and thermoplastic resin fibers. Examples of the water-retentive fibers and the thermoplastic resin fibers are as described above.

The water-retentive fibers of the skin-side layer 2a preferably contain organic cotton. The skin-side layer 2a preferably contains 100 mass% of water-retentive fibers. The water-retentive fibers of the non-skin side layer 2b preferably comprise non-organic cotton. The thermoplastic resin fibers of the non-skin-side layer 2b preferably contain a plurality of components, and more preferably contain PP and PE or PP and PET. The non-skin-side layer 2b preferably contains 20 to 80 mass% of water-retentive fibers and 80 to 20 mass% of thermoplastic resin fibers. The basis weight of the non-skin-side layer 2b is preferably 20 to 40gsm, and more preferably 25 to 35 gsm. The ratio of the basis weight of the skin-side layer 2a to the basis weight of the non-skin-side layer 2b is preferably 1: 1 to 1: 1.3, more preferably 1: 1.15 to 1: 1.25. the thickness (dimension in the thickness direction T) of the top sheet 2 is preferably 0.2 to 1.5mm, and more preferably 0.2 to 1.0 mm.

On the other hand, the auxiliary sheet 5 preferably contains a plurality of components, and more preferably contains PP and PE or PP and PET. The basis weight of the auxiliary sheet 5 is preferably 20 to 40gsm, and more preferably 25 to 35 gsm.

The skin-side layer 2a of the top sheet 2 according to the embodiment of the present disclosure contains 100 mass% of organic cotton and has a basis weight of 10 gsm. The non-skin side layer 2b according to the embodiment of the present disclosure includes 60 mass% of non-organic cotton, 40 mass% of PE and PP, and has a basis weight of 20 gsm. Further, the thickness of the top sheet 2 according to the embodiment of the present disclosure is 0.3 to 0.5 mm. On the other hand, the inner sheet 5i and the outer sheet 5o of the auxiliary sheet 5 according to the embodiment of the present disclosure each contain 100 mass% of PE and PP, and each has a basis weight of 20 gsm. In addition, the thicknesses of the inner sheet 5i and the outer sheet 5o of the auxiliary sheet 5 according to the embodiment of the present disclosure are 1.3 to 1.9mm, respectively. The other auxiliary sheet 6 according to the embodiment of the present disclosure is configured in the same manner as the inner sheet 5i or the outer sheet 5o of the auxiliary sheet 5.

Before describing the auxiliary sheet 5 according to the embodiment of the present disclosure shown in fig. 2 in detail, a basic structure of the auxiliary sheet 5 according to the embodiment of the present disclosure will be described with reference to fig. 4(a), 4(B), and 4 (C). Fig. 4(a) shows the auxiliary sheet 5 according to the embodiment of the present disclosure in an expanded state. As shown in fig. 4(a), the auxiliary sheet 5 according to the embodiment of the present disclosure includes: a first portion 51 at the center in the width direction W; and a pair of

second portions

52, 52 connected to the first portion 51 via a pair of folded

portions

5f, 5f separated from each other in the width direction W and extending in the longitudinal direction L, respectively. In fig. 4(a), reference numeral 512 denotes a surface facing the first portion 51 of the top sheet 2 when assembled to the absorbent article 1, and reference numeral 514 denotes a surface facing the first portion 51 of the absorbent body 4 when assembled to the absorbent article 1.

The pair of

second portions

52, 52 according to the embodiment of the present disclosure are folded with respect to the first portion 51 to overlap the first portion 51 along the corresponding folded portions 5f, respectively. In this case, in the example shown in fig. 4(B), the

second portions

52, 52 are folded toward the topsheet 2 side. In other words, the

second portions

52, 52 overlap on the face 512 of the first portion 51 facing the top sheet 2. In the example shown in fig. 4(C), the

second portions

52, 52 are folded toward the absorbent body 4 side. In other words, the

second portions

52, 52 overlap on the face 514 of the first portion 51 facing the absorbent body 4. In summary, the

second portions

52, 52 according to the embodiment of the present disclosure are folded to the same side as each other with respect to the first portion 51.

As a result, a space 5s at least partially surrounded by the auxiliary sheet 5 is formed. In this case, the pair of

second portions

52 and 52 are bent toward the same side as the first portion 51, and therefore the space 5s is formed larger and more reliably. In this regard, as in the comparative example shown in fig. 4(D), when one second portion 52 ' is superimposed on the surface 512 ' facing the top sheet and the other second portion 52 ' is superimposed on the surface 514 ' facing the absorbent body, that is, when the pair of second portions 52 ', 52 ' are folded toward the opposite sides of the first portion 51 ', it is difficult to increase the space 5s ' surrounded by the auxiliary sheet 5 '.

In particular, in the auxiliary sheet 5 according to the embodiment of the present disclosure, the first and

second portions

51 and 52 are intended to be separated from each other due to the rigidity of the folded

portions

5f and 5 f. Thereby, the space 5s is formed. As a result, the liquid is reliably held in the space 5 s. In this way, the space 5s of the auxiliary sheet 5 according to the embodiment of the present disclosure is different in properties from the space formed between the plurality of sheets overlapped with each other. In this regard, when the rigidity of the auxiliary sheet 5 or the folded

portions

5f, 5f is high, the

second portions

52, 52 are less likely to contact the first portion 51 and form a larger space 5s than when the rigidity of the auxiliary sheet 5 or the folded

portions

5f, 5f is low. In another embodiment (not shown), the auxiliary pieces 5 are folded and overlapped along 3 or more folded portions separated in the width direction W and extending in the longitudinal direction L, respectively.

Referring again to fig. 2, as described above, the auxiliary sheet 5 according to the embodiment of the present disclosure includes the inner sheet 5i and the outer sheet 5o that are overlapped with each other. In the embodiment according to the present disclosure, first, the inner sheet 5i and the outer sheet 5o are prepared to be overlapped with each other and joined to each other by, for example, an adhesive. Next, the pair of

second portions

52 and 52 are folded toward the top sheet 2 side with respect to the first portion 51, and overlap the first portion 51. In the embodiment according to the present disclosure, the

second portions

52, 52 partially overlap each other. In another embodiment (not shown), the

second portions

52, 52 do not overlap each other.

In addition, in the embodiment based on the present disclosure, another absorber 5a is provided in the space 5ss of the first portion 51. Another absorbent body 5a based on an embodiment of the present disclosure contains a super absorbent polymer without containing pulp. Further, in the embodiment according to the present disclosure, an adhesive layer is provided between the inner side sheet 5i and the other absorbent body 5 a. In another embodiment (not shown), the auxiliary sheet 5 does not have another absorbent body.

In the embodiment according to the present disclosure, the liquid such as urine is first absorbed by the top sheet 2, and then reaches the other auxiliary sheet 6, the auxiliary sheet 5, and the absorbent body 4 via the non-skin side layer 2b of the top sheet 2, and is absorbed or held. In this case, since the non-skin side layer 2b containing thermoplastic resin fibers is provided on the non-skin side of the skin side layer 2a of the top sheet 2, the liquid absorbed by the skin side layer 2a is favorably drawn into the non-skin side layer 2 b. As a result, the dryness of the skin-side layer 2a is improved.

In addition, in the embodiment according to the present disclosure, since the

embossed portions

10, 11 are provided from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4, the liquid is favorably transported from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4. In the embodiment according to the present disclosure, as described above, the non-skin side layer 2b of the top sheet 2, the other auxiliary sheet 6, and the auxiliary sheet 5 include PE and PP. In other words, the non-skin side layer 2b, the other auxiliary sheet 6, and the auxiliary sheet 5 include thermoplastic resin fibers having different melting points from each other. As a result, the

embossed portions

10, 11 are formed by thermal welding, and thus, a portion where thermal welding occurs and a portion where thermal welding does not occur are formed. The liquid easily flows in the portion where the thermal welding is not generated. Therefore, the liquid is more favorably transferred from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4.

Further, in the embodiment according to the present disclosure, since the other absorbent body 5a is provided on the auxiliary sheet 5, the liquid can be reliably held.

However, for example, when a pressure is applied to the absorbent body 4 due to the movement of the wearer or the like, there is a possibility that the liquid absorbed by the absorbent body 4 will leak out of the absorbent body 4. In this regard, in the embodiment according to the present disclosure, the space 5s capable of holding liquid is formed in the auxiliary sheet 5 between the top sheet 2 and the absorbent body 4. Therefore, the liquid exuded from the absorbent body 4 can flow into and be held in the space 5 s. As a result, the liquid can be more reliably restricted from reaching the top sheet 2 from the absorbent body 4 while maintaining an excellent skin feel, and therefore, the occurrence of rewet can be more reliably restricted.

second portions

portions

5f and 5 f. Thereby, the volume of the space 5s is maintained large. As a result, the liquid is reliably held in the space 5 s. In this way, the space 5s of the auxiliary sheet 5 according to the embodiment of the present disclosure is different in properties from the space formed between the plurality of sheets overlapped with each other.

In the embodiment according to the present disclosure, a liquid can be held in the space 5ss between the inner sheet 5i and the outer sheet 5o of the auxiliary sheet 5. Therefore, rewetting can be more reliably restricted.

In the embodiment according to the present disclosure, since the

second portions

52 and 52 of the auxiliary sheet 5 overlap each other, the outflow of the liquid temporarily held in the spaces 5s and 5ss to the spaces 5s and 5ss is restricted. Therefore, the generation of rewetting is more reliably restricted.

It is needless to say that the liquid reaching the auxiliary sheet 5 from the top sheet 2 can be held in the spaces 5s and 5ss of the auxiliary sheet 5. Therefore, the absorption capacity of the absorbent article 1 increases.

Fig. 5 shows a schematic cross-sectional view of another embodiment according to the present disclosure. The embodiment shown in fig. 5 is different from the embodiment shown in fig. 2 in the structures of the absorbent body 4 and the auxiliary sheet 5.

The absorbent body 4 of the embodiment shown in fig. 5 includes a skin-side crepe paper 4a, an absorbent core 4b, and a non-skin-side crepe paper 4c stacked on each other in the thickness direction T. The

crepe papers

4a and 4c of the embodiment shown in fig. 5 are configured similarly to the absorbent body 4 of the embodiment shown in fig. 2. On the other hand, the absorbent core 4b of the embodiment shown in fig. 5 contains pulp and a super absorbent polymer. In another embodiment (not shown), the absorbent core 4b comprises a super absorbent polymer and does not comprise pulp. In another embodiment (not shown), the absorbent core 4b does not contain a super absorbent polymer but contains pulp. In the embodiment shown in fig. 5, adhesive layers are provided between the skin-side crepe paper 4a and the absorbent core 4b, and between the absorbent core 4b and the non-skin-side crepe paper 4 c.

In the auxiliary sheet 5 of the embodiment shown in fig. 5, the pair of

second portions

52 and 52 are folded toward the absorbent body 4 side with respect to the first portion 51 and overlap the first portion 51. In addition, in the embodiment shown in fig. 5, the

second portions

52, 52 do not overlap each other. As a result, the communication path 5c communicating with the space 5s surrounded by the auxiliary sheet 5 is formed. Therefore, the liquid is easily guided into the space 5s through the communication path 5 c. This can more reliably restrict rewetting.

In the embodiment shown in fig. 5 in particular, the communication path 5c is directed toward the absorbent body 4. Therefore, the liquid exuded from the absorbent body 4 is more easily guided into the space 5s via the communication path 5 c.

Also, in the embodiment shown in fig. 5, the first portion 51 is located between the space 5s and the top sheet 2. The first portion 51 is different from the

second portions

52 and 52, and is continuously expanded in the width direction W and the length direction L. Thus, the flow of the liquid held in the space 5s toward the top sheet 2 is restricted by the first portion 51. Furthermore, in the embodiment shown in fig. 5, another absorbent body 5a is provided in the first section 51. Therefore, the flow of the liquid held in the space 5s toward the top sheet 2 is further restricted by the other absorbent body 5 a.

Next, still another embodiment of the present invention will be described. Patent document 1 described at the beginning discloses an absorbent article including: a liquid-permeable top sheet comprising water-retentive fibers such as cotton; a liquid impermeable backsheet; an absorber disposed between the top sheet and the back sheet; and an auxiliary sheet which is disposed between the top sheet and the absorber, contains thermoplastic resin fibers, and is provided continuously along the peripheral edge at a heat-welded portion where the top sheet and the back sheet are joined to each other by heat welding.

However, since the bondability of water-retentive fibers such as cotton by thermal fusion is low, if a thermally fused portion is formed by directly thermally fusing a top sheet and a back sheet including cotton, there is a possibility that the bondability of the thermally fused portion is lowered. In this regard, it is considered that a heat-welded part having high bondability can be obtained by disposing an auxiliary sheet containing thermoplastic resin fibers between the top sheet and the back sheet and heat-welding the auxiliary sheet together with the top sheet and the back sheet. However, if the thermoplastic resin fibers are thermally welded, the rigidity of the thermally welded portion may be increased. Therefore, the wearer contacting with the heat-welded portion may feel uncomfortable. Further, if the rigidity of the heat-fused portion is the same along the length of the heat-fused portion, the absorbent article is difficult to bend. The absorbent article is preferably easily foldable in order to be continuously fitted to the skin of the wearer.

According to still another embodiment based on the present disclosure, the following is provided.

[ Structure a1]

An absorbent article having a plurality of absorbent layers,

the absorbent article is provided with:

a liquid-permeable top sheet comprising water-retentive fibers;

a liquid impervious backsheet;

an absorbent body disposed between the topsheet and the backsheet; and

at least a heat-welded portion where the top sheet and the back sheet are joined to each other by heat-welding is continuously provided along the periphery,

wherein the content of the first and second substances,

the rigidity of the heat-fusion part located in the second region is lower than that of the heat-fusion part located in the first region.

According to the structure a1, since the auxiliary sheet including the thermoplastic resin fibers is heat-welded, it is possible to further improve the adhesiveness of the heat-welded portion while maintaining an excellent tactile sensation. Further, since the rigidity of the heat-fused portion located in the second region of the absorbent article is low, it is possible to restrict the feeling of discomfort that the heat-fused portion may give to the wearer. Meanwhile, since the rigidity of the heat-welded portion located in the first region and the rigidity of the heat-welded portion located in the second region are different from each other, a dividing line that divides the first region and the second region from each other becomes a bending start point, and the second region can be easily moved relative to the first region. Therefore, the absorbent article is more reliably kept in contact with the skin of the wearer.

[ Structure a2]

The absorbent article according to structure a1, wherein,

the heat-welded portion located in the second region joins the top sheet and the bottom sheet to each other without including the auxiliary sheet.

According to the structure a2, the heat-welded portion having low rigidity and the heat-welded portion having high rigidity can be realized with a simple structure.

[ Structure a3]

The absorbent article according to structure a1 or a2, wherein,

a dividing line that divides the first region and the second region from each other is a straight line parallel to the longitudinal direction of the absorbent article.

According to the configuration a3, since the second region is folded parallel to the longitudinal direction of the absorbent article, the absorbent article more reliably continues to be attached to the skin of the wearer.

[ Structure a4]

The absorbent article of any of structures a 1-a 3, wherein,

According to the structure a4, the rigidity of the heat-welded portion located in the first region and the rigidity of the heat-welded portion located in the second region can be adjusted with a simple structure.

[ Structure a5]

The absorbent article according to any one of structures a 1-a 4, wherein,

the top sheet is provided with a skin side layer and a non-skin side layer which are laminated with each other, and the water-retentive fiber content ratio of the skin side layer is higher than the water-retentive fiber content ratio of the non-skin side layer.

According to the structure a5, excellent skin touch is maintained by the skin-side layer, and liquid flows toward the absorbent body by the non-skin-side layer, and excellent adhesiveness can be obtained.

[ Structure a6]

The absorbent article according to structure a5, wherein,

the water-retentive fiber content of the skin side layer was 100%.

According to the structure a6, a more excellent skin feel can be provided.

[ Structure a7]

The absorbent article according to any one of structures a 1-a 6, wherein,

the water-retentive fiber content of the top sheet is 40% or more.

According to the structure a7, a more excellent skin feel can be provided.

[ Structure a8]

The absorbent article according to any one of structures a 1-a 7, wherein,

the absorbent body contains 10 mass% or more of a super absorbent polymer.

According to the structure a8, an absorbent article suitable for an incontinence pad, particularly a light incontinence pad, can be provided.

According to still another embodiment of the present disclosure, the joining property of the heat-welded portion can be further improved while maintaining an excellent skin feel, the uncomfortable feeling that the heat-welded portion may give to the wearer can be restricted, and the absorbent article can be more reliably and continuously attached to the skin of the wearer.

Fig. 6 shows a plan view of an absorbent article 1 according to still another embodiment of the present disclosure, and fig. 7 and 8 show schematic cross-sectional views of the absorbent article 1 according to still another embodiment of the present disclosure.

Referring to fig. 6 to 8, an absorbent article 1 according to still another embodiment of the present disclosure differs from the embodiment of fig. 2 in the following respects. That is, the absorbent article 1 according to still another embodiment of the present disclosure further includes a first crepe paper 21 disposed between the absorber 4 and the auxiliary sheet 5, and a second crepe paper 22 disposed between the absorber 4 and the back sheet 3. The top sheet 2, the back sheet 3, the absorbent member 4, the auxiliary sheet 5, and the first and

second crepe papers

21 and 22 are laminated on each other in the thickness direction T. In another embodiment according to the present disclosure, the absorber 4 and the first and

second crepe papers

21 and 22 are smaller than the top sheet 2 and the back sheet 3 in the longitudinal direction L and the width direction W. The auxiliary sheet 5 according to the further embodiment of the present disclosure has substantially the same size as the top sheet 2 and the back sheet 3 in the longitudinal direction L, and is smaller than the top sheet 2 and the back sheet 3 and larger than the absorbent body 4 in the width direction W. In one example, the auxiliary sheet 5 includes a portion folded along a pair of folded portions as in the above-described embodiment. In another example, the auxiliary sheet 5 is not folded along a pair of folded portions.

In yet another embodiment according to the present disclosure, no further auxiliary sheet 6 and

side sheets

7, 7 are provided. In another embodiment according to the present disclosure, adhesive layers are provided between the auxiliary sheet 5 and the first crepe paper 21, and between the second crepe paper 22 and the base sheet 3.

The absorbent article 1 according to still another embodiment of the present disclosure is further provided with a heat-fused portion 31 joining at least the topsheet 2 and the backsheet 3 to each other by heat fusion. The heat-seal portions 31 are provided continuously along the peripheral edge of the absorbent article 1 at positions outside the absorbent member 4 in the longitudinal direction L and the width direction W. As a result, the absorbent body 4 is held between the top sheet 2 and the back sheet 3.

As shown in fig. 6, the absorbent article 1 according to the further embodiment of the present disclosure further includes a plurality of embossed portions 32. The embossed portion 32 according to the further embodiment of the present disclosure includes an embossed portion 32a and a plurality of embossed portions 32b having, for example, a flower shape, which are provided along 2 straight lines extending in the longitudinal direction L and are separated from each other in the width direction W. The embossed portions 32 according to still another embodiment of the present disclosure are recessed in the thickness direction T from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4, respectively. The embossed portion 32 is formed by, for example, thermal welding. For clarity, the embossed portion 32 is not shown in fig. 7 and 8.

As shown in fig. 6, an absorbent article 1 according to still another embodiment of the present disclosure includes a single narrow width portion 1n having a relatively small width (dimension in the width direction W) and a pair of wide width portions 1W, 1W having a relatively large width. In another embodiment according to the present disclosure, the narrow width portion 1n is located inside or at the center in the longitudinal direction L, and the

wide width portions

1w and 1w are located outside the narrow width portion 1n in the longitudinal direction L. Fig. 7 shows a cross-sectional view of the narrow portion 1n, and fig. 8 shows a cross-sectional view of the wide portion 1 w. In another embodiment (not shown), the absorbent article 1 includes a single narrow width portion 1n and a single wide width portion 1 w. In the other embodiment, the narrow width portion 1n is located on one side in the longitudinal direction L, and the wide width portion 1w is located on the other side in the longitudinal direction L.

The absorbent article 1 according to the further embodiment of the present disclosure is divided into a first region 1i located on the inner side or the center in the width direction W and second regions 1o and 1o located on the outer side in the width direction W than the first region 1i by a pair of dividing lines LP and LP extending separately from each other in the width direction W. In this case, the first region 1i is a region from one dividing line LP to the other dividing line LP. The second region 1o is a region from the dividing line LP to the outer end 1ew of the absorbent article 1 in the width direction W. In addition, in another embodiment according to the present disclosure, the widthwise outer end 1ew of the absorbent article 1 is constituted by widthwise W outer ends of the top sheet 2 and the back sheet 3.

The dividing lines LP, LP extend across the heat-welded portions 31, respectively. As a result, a part 31o of the heat-welded part 31 is located in the second region 1o, and the other part 31i of the heat-welded part 31 is located in the first region 1 i. Alternatively, it is also conceivable that the heat-welded portion 31 is located in the first region 1i in the narrow width portion 1n and the heat-welded portion 31 is located in the second region 1o in the

wide width portions

1w, 1 w.

The dividing lines LP, LP according to still another embodiment of the present disclosure are straight lines parallel to the longitudinal direction L. In another embodiment (not shown), the dividing line is a straight line that is not parallel to the longitudinal direction L. In another embodiment (not shown), the dividing line is a curved line.

Moreover, the dividing lines LP, LP according to the further embodiment of the present disclosure extend along the width direction outer ends 5ew of the auxiliary sheet 5, respectively. This means that the auxiliary sheet 5 is present in the first region 1i and absent in the second region 1 o. As a result, the heat-welded part 31i in the first region 1i joins the top sheet 2 and the back sheet 3 together with the auxiliary sheet 5, and the heat-welded part 31o in the second region 1o joins the top sheet 2 and the back sheet 3 without including the auxiliary sheet 5. Therefore, the rigidity of the heat-welded portion 31o located in the second region 1o is lower than that of the heat-welded portion 31i located in the first region 1 i.

In another embodiment (not shown), the dividing lines LP, LP extend inward in the width direction W from the width direction outer end 5ew of the auxiliary sheet 5, and therefore the auxiliary sheet 5 is also present in the second region 1 o. In this case, however, the heat-welded portion 31o located in the second region 1o joins the top sheet 2 and the back sheet 3 to each other without including the auxiliary sheet 5.

The absorbent body 4 according to still another embodiment of the present disclosure includes pulp and Super Absorbent Polymer (SAP). In another embodiment (not shown), the absorbent body 4 does not contain a super absorbent polymer but contains pulp. In yet another embodiment (not shown), the absorbent body 4 contains a super absorbent polymer and does not contain pulp.

The first and

second crepe papers

21 and 22 according to the further embodiment of the present disclosure are each formed of a sheet-like nonwoven fabric. In addition, the first and

second crepe papers

21 and 22 according to still another embodiment of the present disclosure each contain thermoplastic resin fibers and do not contain water-retentive fibers. In another embodiment (not shown), the first and

second crepe papers

21 and 22 each contain water-retentive fibers and thermoplastic resin fibers. Examples of the water-retentive fibers and the thermoplastic resin fibers are as described above.

The water-retentive fibers of the skin side layer 2a preferably include organic cotton. The skin-side layer 2a preferably contains 100 mass% of water-retentive fibers. The water-retentive fibers of the non-skin side layer 2b preferably comprise non-organic cotton. The thermoplastic resin fibers of the non-skin-side layer 2b preferably contain a plurality of components, and more preferably contain PP and PE or PP and PET. The non-skin-side layer 2b preferably contains 20 to 80 mass% of water-retentive fibers and 80 to 20 mass% of thermoplastic resin fibers. The basis weight of the non-skin side layer 2b is preferably 20 to 40gsm, and more preferably 25 to 35 gsm. The ratio of the basis weight of the skin-side layer 2a to the basis weight of the non-skin-side layer 2b is preferably 1: 1 to 1: 1.3, more preferably 1: 1.15 to 1: 1.25. the thickness (dimension in the thickness direction T) of the top sheet 2 is preferably 0.2 to 1.5mm, and more preferably 0.2 to 1.0 mm. Further, the water-retentive fiber content ratio of the top sheet 2 (the ratio of the total mass of the water-retentive fibers contained in the skin-side layer 2a and the mass of the water-retentive fibers contained in the non-skin-side layer 2b to the total mass of the top sheet 2) is preferably 40% or more. Thus, an excellent skin feel can be obtained.

The absorbent body 4 preferably contains 10 mass% or more, more preferably 13 mass% or more, and still more preferably 17 mass% or more of the high molecular polymer. In this way, since the liquid is reliably held by the absorbent body 4, rewet of the temporarily absorbed liquid to the top sheet 2 is restricted.

In another embodiment according to the present disclosure, a liquid such as urine is first absorbed by the top sheet 2, and then reaches the first crepe paper 21, the auxiliary sheet 5, the absorber 4, and the second crepe paper 22 through the non-skin side layer 2b of the top sheet 2, and is absorbed or held.

In addition, in the further embodiment according to the present disclosure, since the embossed portion 32 is provided from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4, the liquid is favorably transported from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4. As in the

embossed portions

10, 11, and 11 of fig. 2, the liquid is more favorably transferred from the top sheet 2 to the auxiliary sheet 5 or the absorbent body 4 by the embossed portions 32.

Further, in still another embodiment based on the present disclosure, in the first region 1i, the heat-welded portion 31i joins the top sheet 2 and the back sheet 3 to each other together with the auxiliary sheet 5 containing thermoplastic resin fibers. As a result, the joining property between the topsheet 2 and the backsheet 3 is further improved. In addition, in another embodiment according to the present disclosure, since the non-skin side layer 2b including thermoplastic resin fibers is provided on the top sheet 2, the bondability between the top sheet 2 and the back sheet 3 is further improved in the second region 1 o.

Also, in still another embodiment based on the present disclosure, the rigidity of the heat-welded portion 31o located in the second region 1o is lower than the rigidity of the heat-welded portion 31i located in the first region 1 i. In other words, the heat-welded portion 31o located in the second region 1o is relatively soft. Therefore, the uncomfortable feeling given to the wearer by the heat-welded portion 31o is restricted.

Meanwhile, in yet another embodiment based on the present disclosure, the rigidity of the heat-welded part 31i located in the first region 1i and the rigidity of the heat-welded part 31o located in the second region 1o are different from each other. Therefore, as shown in fig. 9, when a portion of a dividing line LP that divides the heat-welded portion 31i and the heat-welded portion 31o from each other is denoted by LPx, the dividing line portion LPx serves as a bending start point. As a result, as shown in fig. 10, the second region 1o can easily move relative to the first region 1 i. Therefore, the absorbent article 1 can be more reliably kept in close contact with the skin of the wearer.

In another embodiment according to the present disclosure, since the dividing line portion LPx is a straight line parallel to the longitudinal direction L, the second region 1o is bent parallel to the longitudinal direction L. Therefore, the absorbent article 1 can be more reliably kept in close contact with the skin of the wearer.

In particular, in the still another embodiment according to the present disclosure, 2 dividing line portions LPx serving as bending start points are provided separately from 1 second region 1o or 1 heat-welded portion 31o in the longitudinal direction L. Therefore, the relative movement of the second region 1o with respect to the first region 1i can be obtained more easily and reliably.

In still another embodiment according to the present disclosure, the heat-welded part 31i located in the first region 1i includes the auxiliary sheet 5, and the heat-welded part 31o located in the second region 1o does not include the auxiliary sheet 5, whereby the rigidity of the heat-welded part 31o and the rigidity of the heat-welded part 31i are different from each other. In this way, the difference in rigidity between the heat-welded part 31o and the heat-welded part 31i can be realized with a simple structure, that is, without an additional structure. In addition, in yet another embodiment according to the present disclosure, the dividing line LP or the dividing line part LPx extends along the width direction outer end 5ew of the auxiliary sheet 5, and therefore the rigidity of the heat-welded part 31o and the rigidity of the heat-welded part 31o can be adjusted with a simple structure.

In another embodiment (not shown), the heat-welding process conditions of the heat-welding part 31i and the heat-welding process conditions of the heat-welding part 31o are different from each other, and thus the rigidity of the heat-welding part 31o and the rigidity of the heat-welding part 31i are different from each other. The heat-fusion processing conditions include time, temperature, area, and the like of the heat-fusion processing. In the embodiment shown in fig. 6 to 8, the heat-welding conditions of the heat-welding portion 31i are the same as those of the heat-welding portion 31 o.

The present application claims the benefits of japanese patent applications nos. 2018-185451 and 2018-185589, the disclosures of which are incorporated herein in their entireties.

Description of reference numerals

1 absorbent article

2 Top sheet

3 film

4 absorbent body

5 auxiliary sheet

51 first part

52 second part

5f folding part

Claims

1. An absorbent article having a plurality of absorbent layers,

the absorbent article is provided with:

a liquid permeable top sheet comprising water-retentive fibers;

a liquid impermeable backsheet;

it is characterized in that the preparation method is characterized in that,

the auxiliary sheet includes: a first portion; and a pair of second portions connected to the first portions via a pair of folded portions that are separated from each other in a width direction of the absorbent article and extend in a longitudinal direction of the absorbent article, respectively,

the auxiliary sheet is provided with an inner side sheet and an outer side sheet overlapping each other in the first portion and the second portion,

the pair of second portions are folded along the corresponding folded portions, respectively, toward the side of the absorbent body or the side of the top sheet with respect to the first portion and overlap with the first portion, and the first portion and the second portion are separated from each other due to the rigidity of the folded portions, thereby forming a space capable of holding liquid between the first portion and the second portion.

2. The absorbent article according to claim 1,

3. The absorbent article according to claim 2,

the water-retentive fiber content of the skin side layer was 100%.

4. The absorbent article according to claim 1,

5. The absorbent article according to any one of claims 1 to 4,

the pair of second portions do not overlap each other.

6. The absorbent article according to any one of claims 1 to 4,

7. The absorbent article according to any one of claims 1 to 4,

the inner and outer side panels are identical to each other.

8. The absorbent article according to any one of claims 1 to 4,

the absorbent article further has a heat-fused portion which joins at least the top sheet and the back sheet to each other by heat fusion and is provided continuously along a periphery of the absorbent article,

9. The absorbent article of claim 8,

10. The absorbent article of claim 8,

11. The absorbent article of claim 8,

12. The absorbent article of claim 8,

the water-retentive fiber content of the top sheet is 40% or more.

13. The absorbent article of claim 8,

the absorbent contains 10 mass% or more of a super absorbent polymer.