阅读说明：本技术 吸收性物品 (Absorbent article ) 是由 入户野太朗 田村竜也 加藤伸亨 山本千裕 于 2019-10-24 设计创作，主要内容包括：提供一种能够抑制侧漏并且能够提高防止返湿的性能的吸收性物品。吸收性物品(1)具有顶片(10)、配置于比顶片靠非肌肤相对面侧的位置的中间片(15)、配置于比中间片靠非肌肤相对面侧的位置的吸收芯(31)、以及配置于比吸收芯靠肌肤相对面侧的位置的肌肤面侧片(20)。在吸收性物品沿着前后方向形成有一对折线(FL1、FL2),该一对折线用于将吸收性物品折叠为使吸收性物品的肌肤相对面彼此相对。顶片具有在比中间片靠宽度方向上的外侧的位置向非肌肤相对面侧折回的折回部(12)。该吸收性物品设有折回部与肌肤面侧片接合的接合区域(R11)、以及在比接合区域靠宽度方向上的外侧的位置折回部与肌肤面侧片未接合的非接合区域(R12)。非接合区域的至少局部配置于比折线靠宽度方向上的外侧的位置,折线在非接合区域中形成于比中间片的外侧缘靠宽度方向上的外侧的位置。(Provided is an absorbent article which can suppress side leakage and can improve the performance of preventing rewet. The absorbent article (1) has a top sheet (10), an intermediate sheet (15) disposed at a position closer to the non-skin-facing surface side than the top sheet, an absorbent core (31) disposed at a position closer to the non-skin-facing surface side than the intermediate sheet, and a skin-facing side sheet (20) disposed at a position closer to the skin-facing surface side than the absorbent core. A pair of folding lines (FL1, FL2) for folding the absorbent article so that the skin-facing surfaces of the absorbent article face each other are formed in the absorbent article along the front-rear direction. The top sheet has a folded portion (12) folded back toward the non-skin-facing surface side at a position further outward in the width direction than the intermediate sheet. The absorbent article is provided with a joining region (R11) where the folded portion is joined to the skin-side sheet, and a non-joining region (R12) where the folded portion is not joined to the skin-side sheet at a position on the outer side in the width direction than the joining region. At least part of the non-joined region is disposed at a position further outward in the width direction than the folding line, and the folding line is formed at a position further outward in the width direction than the outer edge of the intermediate sheet in the non-joined region.)

1. An absorbent article having a front-back direction and a width direction orthogonal to each other, a top sheet, an intermediate sheet disposed on a non-skin-facing surface side of the top sheet, an absorbent core disposed on a non-skin-facing surface side of the intermediate sheet, and a skin-facing side sheet disposed on a skin-facing surface side of the absorbent core,

a pair of folding lines for folding the absorbent article so that the skin-facing surfaces of the absorbent article face each other are formed in the absorbent article along the front-rear direction, wherein,

the top sheet has a folded portion folded back toward the non-skin-facing surface side at a position further toward the outside in the width direction than the intermediate sheet,

the absorbent article is provided with a joining region where the folded back portion is joined to the skin-side sheet, and a non-joining region where the folded back portion is not joined to the skin-side sheet at a position further outward in the width direction than the joining region,

at least a part of the non-joined region is disposed on the outer side in the width direction than the fold line,

the fold line is formed at a position further outward in the width direction than an outer edge of the intermediate sheet.

2. An absorbent article having a front-back direction and a width direction orthogonal to each other, a top sheet, an absorbent core disposed on a side other than a skin-facing surface of the top sheet, and a skin-facing side sheet disposed on a side closer to the skin-facing surface than the absorbent core,

a pair of folding lines for folding the absorbent article so that the skin-facing surfaces of the absorbent article face each other are formed in the absorbent article along the front-rear direction, wherein,

the absorbent article has a sheet layer covering a surface of the absorbent core other than the skin-facing surface,

at least the absorbent core and the sheet layer have a central guide portion that is recessed in a thickness direction at a center in the width direction of the absorbent core and extends in the front-rear direction,

the top sheet has a folded portion folded back to the non-skin-facing surface side outside in the width direction,

the absorbent article is provided with a joining region where the folded back portion is joined to the skin-side sheet, and a non-joining region where the folded back portion is not joined to the skin-side sheet at a position further outward in the width direction than the joining region,

at least a part of the non-joined region is disposed on the outer side in the width direction than the fold line,

the fold line is formed in the non-joined area.

3. The absorbent article of claim 2, wherein,

a pair of compressed portions that are compressed at least in the thickness direction of the absorbent core and that extend in the front-rear direction are provided on both sides of the center guide portion in the width direction.

4. The absorbent article according to any one of claims 1 to 3, wherein,

the outer side edge of the absorbent core is positioned further inward in the width direction than the folding line.

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

the absorbent article has a tissue layer covering the skin-facing surface side of the absorbent core,

the fold line is formed on the cotton paper layer.

6. The absorbent article according to claim 5,

the absorbent article has a sheet layer covering a surface of the absorbent core other than the skin-facing surface,

the sheet layer extends to a position closer to the outer side in the width direction than the tissue layer.

7. The absorbent article of claim 1,

the absorbent article is formed with an embossed portion joining the top sheet and the intermediate sheet,

the embossed portion is formed only in a region where the intermediate sheet is disposed.

8. The absorbent article of claim 7,

the embossed section includes a linear embossed section extending linearly and arranged in a lattice shape, and a dot-shaped embossed section in a dot shape in a plan view of the absorbent article,

the linear embossed portions are arranged at intervals in a direction in which the linear embossed portions extend,

the dot embossed portions are arranged at corners of the lattice shape between the line embossed portions,

the dot embossing part has a width longer than that of the line embossing part.

9. The absorbent article according to claim 7 or 8,

the absorbent article has an adhesive for joining the top sheet and the intermediate sheet,

the adhesive forms a predetermined pattern in plan view, the predetermined pattern including an omega pattern, a wave pattern, or a spiral pattern.

Technical Field

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

Background

Sanitary napkins have been known as absorbent articles. For example, patent document 1 discloses an absorbent article having an absorbent core and a top sheet disposed on the skin-facing surface side of the absorbent core, wherein the top sheet is provided with folded portions folded back on both sides in the width direction. The absorbent article of patent document 1 is folded by a folding line extending in the front-rear direction before use so that the skin-facing surfaces of the absorbent article face each other. The fold line overlaps with the folded back portion of the top sheet. The folded portion of the top sheet can rise toward the wearer due to the tendency to fold when worn. The folded portion of the top sheet is brought into contact with the body at the side of the excretory opening of the wearer, thereby suppressing side leakage.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 6313817

Disclosure of Invention

Problems to be solved by the invention

Absorbent articles such as sanitary napkins are generally worn for a certain period of time after absorption of excrement. If the absorbent article having absorbed excrement is worn continuously, the absorbed body fluid may be rewetted by the body pressure applied to the absorbent article. It is therefore desirable to prevent rewetting.

Therefore, an absorbent article capable of suppressing side leakage and improving the performance of preventing rewet is desired.

Means for solving the problems

An absorbent article according to one aspect includes a front-back direction and a width direction orthogonal to each other, a top sheet, a center sheet disposed on a non-skin-facing surface side of the top sheet, an absorbent core disposed on the non-skin-facing surface side of the center sheet, and a skin-facing side sheet disposed on the skin-facing surface side of the absorbent core, wherein the absorbent article has a pair of folding lines formed along the front-back direction for folding the absorbent article so that skin-facing surfaces of the absorbent article face each other, wherein the top sheet has a folded-back portion that is folded back toward the non-skin-facing surface side at a position outside the center sheet in the width direction, and the absorbent article is provided with a joining region where the folded-back portion is joined to the skin-facing surface sheet, and a non-joined portion that is not joined to the skin-facing surface sheet at a position outside the joining region in the width direction And a region in which at least a part of the non-joined region is disposed further outward in the width direction than the fold line, and the fold line is formed further outward in the width direction than an outer edge of the intermediate sheet in the non-joined region.

An absorbent article according to another aspect of the present invention comprises a front-back direction and a width direction orthogonal to each other, a top sheet, an absorbent core disposed at a position closer to a non-skin-facing surface side than the top sheet, and a skin-facing side sheet disposed at a position closer to a skin-facing surface side than the absorbent core, wherein a pair of folding lines for folding the absorbent article so that skin-facing surfaces of the absorbent article face each other are formed along the front-back direction, wherein an outer edge of the absorbent core is located at a position closer to an inner side in the width direction than the folding lines, the absorbent article comprises a sheet layer covering a surface of the absorbent core on the non-skin-facing surface side, and at least the absorbent core and the sheet layer have a central guide portion that is recessed in the thickness direction at a center in the width direction of the absorbent core and extends along the front-back direction, the absorbent article is provided with a joint region where the folded-back portion is joined to the skin-side sheet, and a non-joint region where the folded-back portion is not joined to the skin-side sheet at a position on the outer side in the width direction than the joint region, at least a part of the non-joint region is disposed on the outer side in the width direction than the folding line, and the folding line is formed in the non-joint region.

Drawings

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

Fig. 2 is a cross-sectional view of the absorbent article taken along line 2A-2A shown in fig. 1.

Fig. 3 is a view for explaining a folding manner of the absorbent article.

Fig. 4 is a view schematically showing a wearing state in a cross section taken along line 2A-2A shown in fig. 1.

Fig. 5 schematically shows the deformation of the absorbent core and the tissue layer at the section plane based on fig. 4.

Detailed Description

(1) Brief description of the embodiments

At least the following matters will be made clear from the description of the present specification and the attached drawings.

An absorbent article according to one aspect includes a front-back direction and a width direction orthogonal to each other, a top sheet, a center sheet disposed on a non-skin-facing surface side of the top sheet, an absorbent core disposed on the non-skin-facing surface side of the center sheet, and a skin-facing side sheet disposed on the skin-facing surface side of the absorbent core, wherein the absorbent article has a pair of folding lines formed along the front-back direction for folding the absorbent article so that skin-facing surfaces of the absorbent article face each other, wherein the top sheet includes a folded-back portion that is folded back toward the non-skin-facing surface side at a position outside the center sheet in the width direction, and the absorbent article is provided with a joining region where the folded-back portion is joined to the skin-facing surface sheet, and a non-joined portion that is not joined to the skin-facing surface sheet at a position outside the joining region in the width direction And a bonded region in which at least a part of the non-bonded region is disposed further outward in the width direction than the fold line, and the fold line is formed further outward in the width direction than an outer edge of the intermediate sheet in the non-bonded region.

According to this aspect, the standing portion that can stand up toward the wearer due to the tendency to fold when worn is provided in the non-joined region on the outer side in the width direction than the 1 st fold line and the 2 nd fold line. The rising portion of the top sheet contacts the body at the side of the excretory opening of the wearer, and side leakage can be suppressed. In addition, the body fluid guided to the intermediate sheet via the top sheet is diffused in the intermediate sheet and guided to the outer edge of the intermediate sheet. The outer edge of the intermediate sheet is positioned further inward in the width direction than the folding line, and body fluid does not easily reach the rising portion. Further, when a body pressure is applied to the absorbent core which has absorbed body fluid, the body fluid may leak to the skin-facing surface side. In this case, by forming a space between the rising portion and the skin-side sheet, even when the body fluid is guided from the absorbent core to the skin-side sheet, the body fluid does not easily reach the rising portion. Therefore, the body fluid passing through the rising portion can be prevented from being rewetted. Therefore, the side leakage can be suppressed and the performance of preventing rewet can be improved.

An absorbent article according to another aspect includes a front-back direction and a width direction orthogonal to each other, a top sheet, an absorbent core disposed at a position closer to a non-skin-facing surface side than the top sheet, and a skin-facing side sheet disposed at a position closer to a skin-facing surface side than the absorbent core, wherein a pair of folding lines for folding the absorbent article so that skin-facing surfaces of the absorbent article face each other are formed along the front-back direction, wherein an outer edge of the absorbent core is located at a position closer to an inner side in the width direction than the folding lines, the absorbent article includes a sheet layer covering a surface of the absorbent core on the non-skin-facing surface side, and at least the absorbent core and the sheet layer have a center guide portion that is recessed in the thickness direction at a center in the width direction of the absorbent core and extends in the front-back direction, the absorbent article is provided with a joint region where the folded-back portion is joined to the skin-side sheet, and a non-joint region where the folded-back portion is not joined to the skin-side sheet at a position on the outer side in the width direction than the joint region, at least a part of the non-joint region is disposed on the outer side in the width direction than the folding line, and the folding line is formed in the non-joint region.

According to this aspect, the standing portion that can stand up toward the wearer due to the tendency to fold when worn is provided in the non-joined region on the outer side in the width direction than the 1 st fold line and the 2 nd fold line. The rising portion of the top sheet contacts the body at the side of the excretory opening of the wearer, and side leakage can be suppressed. Further, when a body pressure is applied to the absorbent core which has absorbed body fluid, the body fluid may leak to the skin-facing surface side. In this case, by forming a space between the rising portion and the skin-side sheet, even when the body fluid is guided from the absorbent core to the skin-side sheet, the body fluid does not easily reach the rising portion. Therefore, the body fluid passing through the rising portion can be prevented from being rewetted. The absorbent core and the sheet layer have a central guide portion disposed at the center in the width direction of the absorbent core. The central guide portion is recessed in the thickness direction. The body fluid guided to the absorbent core via the top sheet is guided by the central guide portion and guided to the sheet layer disposed on the non-skin-facing surface side of the absorbent core. By drawing the discharged body fluid to the non-skin-facing surface side, rewetting of the body fluid can be suppressed. Therefore, the side leakage can be suppressed and the performance of preventing rewet can be improved.

According to a preferred aspect, it is preferable that a pair of compressed portions that are compressed at least in the thickness direction of the absorbent core and extend in the front-rear direction are provided on both sides of the central guide portion in the width direction. According to this aspect, the absorbent core is easily deformed at the time of wearing with the central guide portion extending in the front-rear direction and the pair of compressed portions extending in the front-rear direction as base points. Therefore, when a force for sandwiching the legs of the wearer acts, a shape can be realized in which the central guide portion is raised toward the wearer side with the compression portions located on both sides in the width direction as base points. By deforming the absorbent core into a convex shape facing the wearer side, the central guide portion and the excretory opening can be disposed close to each other, and body fluid from the excretory opening can be easily taken in through the central guide portion. In addition, in the case where the body fluid is not guided to the non-skin-facing surface side via the central guide portion but the body fluid is diffused in the skin-facing surface side of the absorbent core, or in the case where the body fluid is diffused in the absorbent core, the body fluid can be guided in the front-rear direction by the compressed portion located on the outer side in the width direction than the central guide portion, and side leakage of the body fluid can be suppressed.

According to a preferred aspect, it is preferable that the outer edge of the absorbent core is located inward in the width direction of the folding line. According to this aspect, the pressure during folding is lower than in a structure in which the absorbent core and the top sheet are folded together, and the solidification of the top sheet can be suppressed. Therefore, contact between the rising portion and the skin can be alleviated. In addition, compared with a structure in which the absorbent core and the top sheet are folded together, the absorbent core is less likely to follow the folding tendency during wearing, and is likely to stand upright with respect to the absorbent core. The rising property of the rising portion can be maintained, side leakage can be further suppressed, and the performance of preventing rewet can be improved.

According to a preferred aspect, the absorbent article preferably includes a tissue layer covering a surface of the absorbent core on the skin-facing surface side, and the fold line is formed in the tissue layer. According to this aspect, when the tissue layer is folded by the fold line, the gap between fibers is enlarged during folding. Therefore, the density of the portions where the folding lines are formed may be lower than that of the portions where the folding lines are not formed. The density of the tissue layer increases from the center of the absorbent article in the width direction toward the side. Therefore, when the bodily fluid diffuses in the tissue paper sheet, even if the bodily fluid reaches the portion where the folding line is formed (the portion with a low density), the bodily fluid is not easily diffused further to the lateral portion where the folding line is not formed (the portion with a high density). The body fluid can be made less likely to spread to the region overlapping the rising portion, and the rewet through the rising portion can be suppressed.

According to a preferred aspect, the absorbent article preferably has a sheet layer covering a surface of the absorbent core other than the skin-facing surface, the sheet layer extending to the outside in the width direction of the tissue layer. According to this aspect, the sheet layer has a longer length in the width direction than the tissue layer, and the sheet layer can easily introduce the body fluid into the gaps between the fibers than the tissue layer, so that the body fluid can be diffused on the side farther from the body, and rewet to the skin-facing surface side can be suppressed.

According to a preferred aspect, the absorbent article is preferably formed with an embossed portion for joining the top sheet and the intermediate sheet, and the embossed portion is preferably formed only in a region where the intermediate sheet is disposed. According to this aspect, the embossed portion is recessed in the thickness direction, and the body fluid can be diffused in the planar direction. In this case, since the embossed portion is formed only in the region where the intermediate sheet is disposed, the body fluid is less likely to spread to the outer side in the width direction than the intermediate sheet, and is less likely to spread to the rising portion of the top sheet. Therefore, the side leakage can be further suppressed and the performance of preventing rewet can be improved.

According to a preferred aspect, the embossed section includes linear embossed sections extending in a linear manner and arranged in a lattice shape in a plan view of the absorbent article, and dot-shaped embossed sections arranged at intervals in a direction in which the linear embossed sections extend, the dot-shaped embossed sections being arranged at corners of the lattice shape between the linear embossed sections, and a width of the dot-shaped embossed section being longer than a width of the linear embossed sections. According to this aspect, the body fluid diffused through the linear embossed portion reaches the point embossed portion. The dot embossed portions are located at the corners of the lattice shape, and the body fluid is collected through the plurality of linear embossed portions. The embossed portion is recessed in the thickness direction, and the distance between the embossed portion and the absorbent core is short, so that the body fluid is easily guided to the absorbent core. Since the width of the dot embossed portion is longer than that of the line embossed portion, it is easier to guide the collected body fluid to the absorbent core. By guiding the body fluid to the side away from the body, rewet can be further suppressed.

According to a preferred aspect, the absorbent article preferably includes an adhesive for joining the top sheet and the intermediate sheet, the adhesive forming a predetermined pattern in a plan view, and the predetermined pattern including an omega pattern, a wave pattern, or a spiral pattern. According to this aspect, the topsheet and the intermediate sheet are joined by the embossed portion and the adhesive. By providing the adhesive together with the embossed portion, the area of the embossed portion can be reduced, and a reduction in the tactile sensation of the skin can be suppressed. Further, the region where the adhesive is disposed and the region where the adhesive is not disposed can be provided, and the drawing-in property of the body fluid can be secured in the region where the adhesive is not disposed.

The absorbent article of the present embodiment may be referred to as an absorbent article

Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. In the following embodiments, a disposable sanitary napkin will be described as an example of an absorbent article. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. It should be noted, however, that the drawings are schematic, and there are cases where the scale of each dimension or the like differs from the real thing. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, the drawings may include portions having different dimensional relationships and ratios from each other.

(1) General structure of absorbent article

Fig. 1 is a plan view of an absorbent article according to an embodiment. Fig. 2 is a cross-sectional view taken along line 2A-2A of fig. 1 of the absorbent article. Fig. 4 is a view schematically showing a wearing state in a cross section taken along line 2A-2A shown in fig. 1. In fig. 2, the members constituting the absorbent article are separated in the thickness direction for the convenience of explanation, but in an actual product, there are portions where the members are joined.

The absorbent article 1 has a front-back direction L and a width direction W orthogonal to each other, and has a thickness direction T extending from the skin-facing surface side T1 of the wearer to the non-skin-facing surface side T2. The skin-facing surface side T1 corresponds to the side facing the skin of the wearer when in use. The non-skin-facing surface side T2 corresponds to the side opposite to the side on which the skin-facing surface side T1 is located in use, that is, the side facing the opposite side to the skin of the wearer.

The absorbent article 1 has a crotch region S1, a front side region S2, and a back side region S3. The crotch region S1 is a region opposite to the excretory opening of the wearer, for example, the vaginal opening. When the absorbent article 1 is attached to underwear, the crotch region S1 is disposed in the crotch portion of the underwear and is a region disposed between the legs of the wearer. The front region S2 is located on the front side of the crotch region S1. The front end edge of the front side region S2 defines the front end edge of the absorbent article 1. The rear side region S3 is located rearward of the crotch region S1. The rear end edge of the rear region S3 defines the rear end edge of the absorbent article 1.

The absorbent article 1 has wing portions 3. The wing portions 3 extend to the outside in the width direction W of the outer edge 31E of the absorbent core 31 in the crotch region S1. The wing part 3 is provided in the crotch region S1. The leading edge of the wing portion 3 is defined by the root of the wing portion 3, and corresponds to the portion located on the leading side of the two portions that are recessed to the inside in the width direction W to the maximum extent. The front end edge of the wing part 3 defines the boundary of the crotch region S1 and the front region S2. The rear end edge of the wing portion 3 is defined by the root of the wing portion 3, and corresponds to a portion located on the rear side of two portions recessed to the inside in the width direction W to the maximum extent. The rear end edge of the wing part 3 defines the boundary of the crotch region S1 and the rear region S3.

The absorbent article 1 preferably has at least an absorbent core 31, a skin-side sheet 20, an intermediate sheet 15, a top sheet 10, and a back sheet 25. The absorbent core 31 is preferably disposed at least in the crotch region S1 and the rear region S3, and is preferably disposed from the front region S2 to the rear region S3. The absorbent core 31 has an absorbent material that absorbs liquid. Pulp and SAP may be present as the absorbent material in this embodiment. The absorbent core of the variant may also be without SAP.

The skin side sheet 20 is disposed on the skin facing surface side T1 with respect to the absorbent core 31. The skin-side sheet 20 of the present embodiment is disposed between a tissue layer 32 described later and the folded portion 11 of the top sheet 10. The skin-side sheet 20 constitutes the skin-facing surface side of the wing section, and the outer edge 20E of the skin-side sheet 20 reaches the outer edge of the wing section 3 and reaches the outer edge of the absorbent article in a state where the wing section is not folded back toward the non-skin-facing surface side of the underwear. The skin-side sheet 20 is preferably provided in a pair of left and right sides with a gap therebetween in the width direction. The inner edge 20I of the skin-side sheet 20 preferably does not reach the center of the absorbent article in the width direction but coincides with the inner edge of the folded portion, and is preferably located further outward in the width direction than the outer edge of the absorbent core 31. The skin side sheet is preferably made of a nonwoven fabric, and the surface thereof may be subjected to a hydrophobic treatment.

The intermediate sheet 15 is disposed on the skin facing surface side T1 with respect to the skin side sheet 20. The intermediate sheet 15 of the present embodiment is disposed between the tissue layer 32 and the non-folded portion 12 of the top sheet 10 that is not folded. The entire surface of the skin-facing surface side T1 of the intermediate sheet 15 is covered with the non-folded portion 12 of the topsheet 10. The entire surface of the intermediate sheet 15 other than the skin-facing surface side T2 is covered with the tissue paper layer 32. In the modification, the outer side of the surface of the intermediate sheet 15 other than the skin-facing surface side T2 may be covered with the folded portion 11 of the top sheet 10. The outer edge 15E of the intermediate sheet 15 is preferably positioned further outward in the width direction than the outer edge 31E of the absorbent core 31, and preferably coincides with the inner edge 11I of the folded portion 11.

The top sheet 10 covers the surface T1 on the skin-facing surface side of the intermediate sheet 15. The top sheet 10 has a folded portion 11 folded back toward the non-skin facing surface side T2 with the folding line RL as a base point and a non-folded portion 12 not folded back with the folding line RL as a base point. The folded portion 11 is folded back toward the non-skin-facing surface side T2 at a position further outward in the width direction W than the intermediate sheet 15. That is, the fold line RL is located outward in the width direction W from the outer edge 15E of the intermediate sheet 15. The folded portion 11 overlaps the non-folded portion 12, and the folded portion 11 and the non-folded portion 12 are laminated in a region on the outer side in the width direction W than the intermediate sheet 15. The folded portion 11 and the non-folded portion 12 may not be joined to each other.

The absorbent article 1 includes a joining region R11 where the folded back portion 11 is joined to the skin-side sheet 20, and a non-joining region R12 where the folded back portion 11 is not joined to the skin-side sheet 20 at a position on the outer side in the width direction W than the joining region R11. The joining region R11 is a region where the joining portion 14 joining the folded portion 11 and the skin-side sheet 20 is provided in a plan view. The non-joined region R12 is a region where the joined portion 14 is not provided at a position further outward in the width direction than the joined portion 14 in a plan view. The outer edge of the non-joining region R12 coincides with the fold-back line RL. In the form in which the plurality of joining portions 14 are formed, the non-joining region R12 is a region on the outer side in the width direction than the joining portion 14 located on the outermost side in the width direction among the plurality of joining portions. The joining region R11 is provided separately from the fold back line RL. The non-joining region R12 can rise toward the skin-facing surface side with the joining portion 14 as a base point.

The inner edge 11I of the folded portion 11 is preferably positioned further outward in the width direction W than the outer edge 31E of the absorbent core 31, and preferably coincides with the inner edge 20I of the skin-side sheet 20. The folded back line RL is preferably located on the outer side in the width direction than the outer side edge 32E of the tissue paper layer 32, and is preferably located on the outer side in the width direction than the outer side edge 33E of the sheet layer 33. The non-folded portion 12 covers the entire surface of the skin-facing surface side of the intermediate sheet 15.

The tissue layer 32 covers the skin-facing surface side T1 of the absorbent core 31. Preferably, the outer edge 32E of the tissue layer 32 is located further to the outside in the width direction than the outer edge of the absorbent core 31, further to the inside in the width direction than the outer edge 33E of the sheet layer 33, and further to the outside in the width direction than the outer edge of the intermediate sheet 15. In the region on the outer side in the width direction than the absorbent core 31, the tissue layer 32 covers the skin-facing surface side surface of the sheet layer 33. The tissue layer 32 covers the surface T2 of the intermediate sheet 15 other than the skin-facing surface. In the region on the outer side in the width direction than the intermediate sheet, the tissue layer 32 covers the surface of the skin-side sheet 20 on the non-skin-facing surface side T2.

The sheet layer 33 is positioned between the absorbent core 31 and the backsheet 25, and covers the surface of the absorbent core 31 on the non-skin-facing surface side T2. In the region on the outer side in the width direction than the absorbent core and the tissue layer 32, the sheet layer 33 covers the surface of the non-skin-facing surface side T2 of the skin-side sheet 20. The sheet layer 33 is preferably a sheet made of air-laid pulp (absorbent sheet obtained by bonding pulp with a binder and forming a sheet). By constituting the sheet layer 33 with air-laid pulp, the introduction of body fluid by the central guide portion described later can be improved.

The back sheet 25 is disposed over the entire area of the absorbent article, and is provided at the side closest to the non-skin-facing surface in the thickness direction. The back sheet 25 is disposed on the non-skin-facing surface side of the sheet layer 33. The back sheet 25 is disposed on the non-skin-facing surface side of the skin-side sheet 20 in the region on the outer side in the width direction than the sheet layer 33.

At least the absorbent core 31 and the sheet layer 33 have a central guide portion 71. The center guide portion 71 is recessed in the thickness direction at the center in the width direction of the absorbent core and extends in the front-rear direction. The center guide portion 71 may be provided at least on the absorbent core 31 and the sheet layer 33, or may be provided on the tissue layer 32. Preferably, the center guide portion 71 is formed by compressing the absorbent core 31 or the like through a nip between a convex roll (not shown) having a plurality of protrusions and an anvil roll (not shown) having a flat surface. It is preferable that the central guide portion 71 is formed by compression processing from the non-skin-facing surface side.

Preferably, a pair of compression portions 72 that compress at least the absorbent core 31 in the thickness direction and extend in the front-rear direction are provided on both sides of the central guide portion 71 in the width direction. The compression portions 72 are arranged at intervals in the width direction. The compressed part 72 may be provided at least in the absorbent core 31, or may be provided in the sheet layer 33, the tissue layer 32, the intermediate sheet 15, and the top sheet 10. Similarly to the central guide portion 71, the absorbent core 31 and the like are preferably subjected to compression processing through a nip between a convex roll (not shown) having a plurality of protrusions and an anvil roll (not shown) having a flat surface, thereby forming the compression portion 72.

The absorbent article has at least a pair of a 1 st folding line FL1 and a 2 nd folding line FL2 for folding the absorbent article so that the skin-facing surfaces of the absorbent article face each other, and the absorbent article is folded via the plurality of folding lines in a state before use. Fig. 3 is a diagram for explaining a folded configuration of the absorbent article 1. Further, the absorbent article 1 of the present embodiment is folded together with the package sheet 70, but in a modified example, the absorbent article 1 may be folded only without the package sheet 70.

The absorbent article 1 is disposed on the packaging sheet 70 such that the non-skin-facing surface of the absorbent article 1 faces the packaging sheet 70 when folded. In a state where the absorbent article 1 is disposed on the package sheet 70, one outer edge of the absorbent article 1 and one outer edge of the package sheet 70 are folded back inward with a 1 st fold line FL1 extending in the front-rear direction L as a starting point (see fig. 3 (a)). In the region (region on both sides of the 1 st folding line FL 1) disposed across the 1 st folding line FL1 in the unfolded state (state before folding) of the absorbent article, the skin-facing surfaces thereof face each other in the folded state. The state in which the skin-facing surfaces face each other is a state in which one skin-facing surface and the other skin-facing surface face each other, and this is a concept including a state in which another member is disposed between the one skin-facing surface and the other skin-facing surface.

Next, the other outer edge of the absorbent article 1 and the other outer edge of the wrapping sheet 70 are folded back inward from the 2 nd folding line FL2 extending in the front-rear direction L (see fig. 3 (b)). In the region (region on both sides of the 2 nd folding line FL2) disposed across the 2 nd folding line FL2 in the unfolded state (state before folding) of the absorbent article 1, the skin-facing surfaces thereof face each other in the folded state. The 1 st folding line FL1 and the 2 nd folding line FL2 constitute a pair of folding lines of the present invention.

Next, the rear end edge of the absorbent article 1 and the rear end edge of the package sheet 70 are folded inward with the 3 rd folding line FL3 extending in the width direction W as a base point, in a state folded by the 1 st folding line FL1 and the 2 nd folding line FL 2. Next, the front end edge of the absorbent article 1 and the front end edge of the packaging sheet 70 are folded back inward with the 4 th folding line FL4 extending in the width direction W as a starting point (see fig. 3 (c)). By folding in this way, the length of the absorbent article 1 in the width direction W and the length in the front-rear direction L are made shorter, and the absorbent article 1 is made smaller. Therefore, compact portability can be achieved.

In the unfolded state where the absorbent article 1 folded in this way is unfolded, the absorbent article 1 is formed with a folding tendency by the 1 st folding line FL1, the 2 nd folding line FL2, the 3 rd folding line FL3, and the 4 th folding line FL 4. The folding tendency achieved by the 1 st fold line FL1 and the folding tendency achieved by the 2 nd fold line FL2 become folding tendencies away from the wearer. The 1 st folding line FL1 and the 2 nd folding line FL2 are valley-folded folding lines. Therefore, the region on the outer side in the width direction W than the 1 st folding line FL1 and the 2 nd folding line FL2 in the expanded state stands up with the 1 st folding line FL1 and the 2 nd folding line FL2 as base points.

Next, the absorbent article in the worn state will be described with reference to fig. 4 and 5. Fig. 4 schematically shows a state where the absorbent article 1 is attached to the underwear S in a cross section based on the cross section 2A-2A shown in fig. 1, and fig. 5 schematically shows a deformed state of the absorbent core 31 and the tissue layer 32 in a cross section based on fig. 4. The center in the width direction of the absorbent article is disposed on the skin-facing surface side of the underwear, and the wing sections 3 of the absorbent article are folded back toward the non-skin-facing surface side T2 of the underwear S. The 1 st folding line FL1 and the 2 nd folding line FL2 are formed at positions further outward in the width direction W than the outer edge 15E of the intermediate sheet 15. It is preferable that at least a part of the non-joined region R12 is disposed at a position more outward in the width direction than the 1 st folding line FL1 and the 2 nd folding line FL 2.

The non-joined region R12 on the outer side in the width direction W than the 1 st folding line FL1 and the 2 nd folding line FL2 becomes a standing portion 13 (see fig. 4) that can stand up further toward the wearer due to a folding tendency when worn. The standing portion 13 of the top sheet 10 is in contact with the body at the side of the excretory opening of the wearer, and can suppress side leakage.

In addition, the body fluid discharged to the absorbent article is guided toward the intermediate sheet 15 and the absorbent core 31 via the top sheet 10. At this time, the body fluid guided to the intermediate sheet 15 through the top sheet 10 is diffused in the intermediate sheet 15 and guided to the outer edge 15E of the intermediate sheet 15. The outer edge 15E of the intermediate sheet 15 is positioned further inward in the width direction W than the 1 st folding line FL1 and the 2 nd folding line FL2, and body fluid does not easily reach the standing part 13. The bodily fluid having passed through the top sheet 10 and the intermediate sheet 15 is guided to the absorbent core 31 positioned on the non-skin surface side T2 with respect to the skin-side sheet 20. When a body pressure is applied to the absorbent core 31 that has absorbed body fluid, the body fluid may seep out to the skin-facing surface side. At this time, by forming a space between the rising portion 13 and the skin-side sheet 20, even when the body fluid is guided from the absorbent core 31 to the skin-side sheet 20, the body fluid does not easily reach the rising portion 13. Therefore, the body fluid passing through the rising portion 13 can be prevented from being rewetted. Therefore, the side leakage can be suppressed and the performance of preventing rewet can be improved.

In order to further ensure the rising property of the rising portion 13, it is preferable that the joining portion 14 is not disposed in the region on the outer side in the width direction W than the 1 st folding line FL1 and the 2 nd folding line FL2, and the joining portion 14 is located only on the inner side in the width direction W than the 1 st folding line FL1 and the 2 nd folding line FL 2. In a manner that the joining portion 14 is located only on the inner side in the width direction than the 1 st folding line FL1 and the 2 nd folding line FL2, the range of the standing portion 13 in the width direction is between the 1 st folding line FL1 and the fold line RL and between the 2 nd folding line FL2 and the fold line RL. In addition, in a manner that the joining portion 14 is positioned further to the outside in the width direction than the 1 st folding line FL1 and the 2 nd folding line FL2, the range in the width direction of the standing portion 13 is between the joining portion 14 and the folding line RL.

In addition, the central guide portion 71 is recessed in the thickness direction T. The body fluid guided to the absorbent core 31 via the top sheet 10 is guided to the absorbent core 31 by the central guide portion 71 and guided to the sheet layer 33 disposed on the non-skin-facing surface side T2 with respect to the absorbent core 31. By introducing the discharged body fluid to the non-skin-facing surface side T2, rewetting of the body fluid can be suppressed. In addition, the center guide portion 71 in which the absorbent core 31 is compressed in the thickness direction is more likely to take in body fluid and to diffuse body fluid in the front-rear direction L because of its higher density. By introducing and diffusing the body fluid by the central guide portion 71, rewetting of the body fluid can be further suppressed.

As shown in fig. 5, when a force of sandwiching the legs of the wearer acts when the absorbent article is worn, the absorbent core 31 deforms into a shape that bulges toward the skin side from the side portions in the width direction W toward the center portion. Specifically, the center guide portion 71 can guide the absorbent core 31 as follows: the absorbent core 31 is bent toward the skin-facing surface side T1 in the thickness direction T with the center guide portion 71 as a base point, and the absorbent core 31 can be guided by the compressed portion 72 as follows: the absorbent core 31 is bent toward the non-skin-facing surface side in the thickness direction T with the compressed portion 72 as a base point. Therefore, the central guide portion 71 can be formed to stand toward the wearer side with the compression portions 72 located on both sides in the width direction W as base points. By deforming the absorbent core 31 into a convex shape facing the wearer side, the central guide portion 71 and the excretory opening can be disposed close to each other, and body fluid from the excretory opening can be easily taken in through the central guide portion 71. Even when the body fluid diffuses in the skin-facing surface side of the absorbent core 31 or when the body fluid diffuses in the absorbent core, the body fluid can be guided in the front-rear direction L by the compressed portion 72 located on the outer side in the width direction W than the central guide portion 71, and side leakage of the body fluid can be suppressed.

The outer edge 31E of the absorbent core 31 is preferably positioned more inward in the width direction W than the 1 st folding line FL1 and the 2 nd folding line FL 2. Therefore, when the absorbent article is folded with the 1 st folding line FL1 and the 2 nd folding line FL2, the absorbent core 31 is not folded. The pressure at the time of folding is small as compared with a structure in which the absorbent core and the topsheet are folded together, and the solidification of the topsheet can be suppressed. Therefore, contact between the rising portion and the skin can be alleviated. In addition, compared with a structure in which the absorbent core and the top sheet are folded together, the absorbent core is less likely to follow the folding tendency during wearing, and is likely to stand upright with respect to the absorbent core. The rising property of the rising portion 13 can be maintained, side leakage can be further suppressed, and the performance of preventing rewet can be improved.

It is preferable that the 1 st folding line FL1 and the 2 nd folding line FL2 are formed at the tissue layer 32. That is, the outer edge of the tissue layer 32 is preferably positioned further outward in the width direction W than the 1 st folding line FL1 and the 2 nd folding line FL 2. When the tissue layer 32 is folded by the 1 st folding line FL1 and the 2 nd folding line FL2, gaps between fibers are enlarged during folding. Therefore, the density of the portion where the 1 st folding line FL1 and the 2 nd folding line FL2 are formed may be lower than the density of the portion where the 1 st folding line FL1 and the 2 nd folding line FL2 are not formed. The density of the tissue layer increases from the center of the absorbent article in the width direction toward the side. Therefore, when the bodily fluid diffuses in the tissue paper sheet, even if the bodily fluid reaches the portion (lower density portion) where the 1 st folding line FL1 and the 2 nd folding line FL2 are formed, the bodily fluid is not easily diffused further to the lateral portion (higher density portion) where no folding line is formed. Body fluid can be made less likely to spread to the region overlapping the rising portion 13, and rewet through the rising portion 13 can be suppressed.

The sheet layer 33 preferably extends to the outside in the width direction W of the tissue layer 32. The sheet layer has a longer length in the width direction than the tissue layer, and the sheet layer can easily introduce body fluid into the gaps between the fibers than the tissue layer, and therefore, the body fluid can be diffused on the side farther from the body, and rewet to the skin-facing surface side can be suppressed. For example, in a mode in which the absorbent core 31 does not have SAP and a mode in which the amount of SAP is small, body fluid that cannot be held by SAP is likely to be present, and by spreading the body fluid on a side farther from the body by the sheet layer 33, rewetting on the skin-facing surface side can be effectively suppressed.

As shown in fig. 1, it is preferable that an embossed portion 60 for joining the top sheet 10 and the intermediate sheet 15 is formed in the absorbent article 1. In a plan view, the embossed portion 60 is preferably formed only in the region where the intermediate sheet 15 is disposed. In the present embodiment, the intermediate sheet 15 is disposed with the same width over the entire region in the front-rear direction L of the absorbent article 1, and the embossed section 60 is not disposed at the outer side in the width direction W than the intermediate sheet 15. The embossed portion 60 is recessed in the thickness direction T, and can diffuse body fluid in the planar direction. In this case, since the embossed portion is formed only in the region where the intermediate sheet is disposed, the body fluid is less likely to spread to the outer side in the width direction than the intermediate sheet, and is less likely to spread to the rising portion of the top sheet. Therefore, the side leakage can be further suppressed and the performance of preventing rewet can be improved.

As shown in fig. 1, in a plan view of the absorbent article, the embossed portion 60 preferably includes linear embossed portions 61 extending linearly and arranged in a lattice shape, and dot-shaped embossed portions 62. The embossing line portions 61 are preferably arranged at intervals in the direction in which the embossing line portions 61 extend. The linear embossed portions 61 extend along the 1 st direction D1 and the 2 nd direction D2, the 1 st direction D1 is inclined with respect to the front-rear direction L and the width direction W, and the 2 nd direction D2 intersects the 1 st direction D1 and is inclined with respect to the front-rear direction L and the width direction W. The embossing line portions 61 are preferably arranged at intervals in the 1 st direction D1 and at intervals in the 2 nd direction D2. A lattice shape having a plurality of diamond shapes is formed by the linear embossed portions 61 extending in the 1 st direction D1 and the linear embossed portions 61 extending in the 2 nd direction D2. The dot embossed portions 62 are arranged at the corners of the lattice shape between the line embossed portions 61. The dot embossed portions 62 are preferably longer in width than the line embossed portions 61.

The body fluid diffused through the linear embossed portion 61 reaches the point embossed portion 62. The dot embossed portions 62 are positioned at the corners of the lattice shape, and the body fluid is collected through the plurality of linear embossed portions 61. The embossed portion 60 is recessed in the thickness direction T, and the distance from the absorbent core 31 is short, so that the body fluid is easily guided to the absorbent core 31. Since the width of the spot embossed portion 62 is longer than the width of the line embossed portion 61, the collected bodily fluid is more easily guided to the absorbent core 31. By guiding the body fluid to the side away from the body, rewet can be further suppressed.

It is preferable to have an adhesive for joining the top sheet 10 and the intermediate sheet 15. That is, the topsheet 10 and the intermediate sheet 15 are joined by the embossed portion 60 and the adhesive. By providing the embossed portion 60 with the adhesive, the area of the embossed portion 60 can be reduced, and the reduction in the texture of the surface of the top sheet 10 on the skin-facing surface side due to the embossed portion 60 can be suppressed.

Further, it is preferable that the adhesive forms a predetermined pattern in a plan view, and the predetermined pattern includes an omega pattern, a wave pattern, or a spiral pattern. The region where the adhesive is disposed and the region where the adhesive is not disposed can be provided, and the drawing-in property of the body fluid can be ensured in the region where the adhesive is not disposed.

The present invention has been described in detail with reference to the above embodiments, but it is obvious 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 of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

The entire contents of japanese patent application No. 2018-203910, which was filed on 2018, 10, 30, are incorporated herein by reference.

Industrial applicability

An absorbent article capable of suppressing side leakage and improving the performance of preventing rewet can be provided.

Description of the reference numerals

1. An absorbent article; 10. a topsheet; 11. a fold-back portion; 12. a non-folded back portion; 13. a rising part; 14. a joint portion; 15. an intermediate sheet; 20. a skin side sheet; 31. an absorbent core; 32. a cotton paper layer; 33. a sheet layer; 60. an embossing part; 61. a linear embossing portion; 62. a dot embossing part; 71. a central guide portion; 72. a compression section; FL1, fold line 1 (broken line); FL2, fold line 2 (broken line); r11, junction region; r12, non-junction region; RL, the fold-back line; l, the front-back direction; w, width direction; t, the thickness direction; t1, skin-facing surface side; t2, non-skin-facing surface side.