JP7135442B2 - absorbent article - Google Patents

Description

TECHNICAL FIELD The present invention relates to an absorbent article that can effectively prevent post-leakage.

Adult paper diapers generally include a tape-fastened type, a pants type, and the like, and these paper diapers are appropriately selected and used according to the need for nursing care in excretion of the user. These absorbent articles are composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two sheets. By adopting such a configuration, body fluids such as urine permeate the top sheet of the absorbent article and are absorbed by the absorbent body, and are prevented from leaking to the outside by the back sheet.

By the way, tape-type or pants-type paper diapers (hereinafter referred to as paper diapers) may be used alone or may be used together with an incontinence pad inside. In most cases, they are used together, and the incontinence pad is layered on the top sheet of the paper diaper. This is because the cost per paper diaper is high. After absorbing and holding excrement with an incontinence pad, which is cheaper than paper diapers, only the incontinence pad can be replaced, so that even after excretion, This is because the absorbent article can be used economically at a low cost without having to replace paper diapers, which are more costly.

In recent years, among urine absorbing pads, so-called wide-type products having a wide crotch portion to increase the absorption of urine have been marketed. Since these wide-type urine absorption pads are expected to be used for a relatively long period of time, they are required to have properties that do not leak even when urination is performed multiple times.

Here, the top sheet that allows excreted urine to permeate the absorbent body is generally treated with a hydrophilizing agent to improve liquid permeability. As the hydrophilizing agent falls off, the liquid permeability decreases, and urine leaks from the back side (back side) of the absorbent article, so-called back leakage, which may occur. is being considered.

As an absorbent article studied to prevent back leakage, Patent Document 1 discloses that a pocket space is formed on the upper surface side of the top sheet in the front side portion and/or the rear side portion of the absorbent article, the pocket space opening toward the body fluid discharge portion side. An absorbent article is disclosed in which a pocket sheet for opening the pocket space is provided, and an opening elastic stretchable member is provided for opening the pocket space in the pocket sheet.

Further, in Patent Document 2, a first curve formed by a curved line bulging toward the front end side of the absorbent article in a plan view and a front end of the first curve are provided on the upper surface portion of the absorbent article on the front side of the absorbent article. A closed area portion defined by a second curved line which is located on the side and bulges toward the front end side of the absorbent article and whose both ends are joined to both ends of the first curved line, is viewed from the upper surface side. An absorbent article is disclosed which is characterized by being recessed to form a concave front bodily fluid reservoir.

JP 2007-143696 A JP 2006-218317 A

However, even in the absorbent articles described in Patent Documents 1 and 2, when urination is repeated, after-leakage cannot be sufficiently prevented, and the liquid permeability of the top sheet is lowered. In some cases, the wearing feeling deteriorated due to the decrease in the absorption speed. Therefore, the present invention has been made in view of the above problems, and provides an absorbent article that can effectively prevent after-leakage even when urination is repeated and can maintain a good wearing feeling. intended to provide

The inventors of the present invention conducted extensive research in view of the above problems. As a result, the inventors found that the above problems can be solved by providing two opening-forming sheets that form a pocket-like space in the forward direction, a predetermined slit, and a predetermined channel emboss, and completed the present invention. reached. Specifically, the present invention provides the following.

(1) A first aspect of the present invention is an absorbent absorbent comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body disposed between the topsheet and the backsheet. The absorbent article is divided into approximately three parts in the longitudinal direction, namely, a front part, a crotch part, and a rear part. and a liquid-permeable second opening-forming sheet are provided in this order, and the front end of the second opening-forming sheet is positioned further rearward than the front end of the first opening-forming sheet. the rear end of the second opening forming sheet is adjacent to the first opening forming sheet outside the rear end of the first opening forming sheet in the rear direction, and Width direction end portions of the second opening forming sheet are adjacent to the first opening forming sheet on the width direction outside of width direction end portions of the first opening forming sheet, and the first opening forming sheet The width direction end portions and the rear end portions of the sheet are joined to the top sheet, and the front end portions are not joined to the top sheet. It is formed between the first opening-forming sheet and the top sheet, and the second opening-forming sheet is joined to the top sheet at both ends in the width direction and at the ends in the rearward direction, and at the ends in the forward direction. By not joining the top sheet and the first opening-forming sheet, a pocket-shaped second space having an opening in the forward direction is formed between the second opening-forming sheet and the first opening-forming sheet. , is formed in the absorber, in plan view, from the outside of the first opening forming sheet in the front direction to the region where the first space or the second space is provided, in the longitudinal direction A pair of left and right first slits formed in a substantially linear shape is provided, and in a plan view, the first space or the second space can be seen from the outside of the first opening forming sheet in the front direction. A pair of left and right first channel embossments extending in the longitudinal direction are provided from the top sheet to the absorbent body over the provided area, and the pair of first channel embossments are respectively inward in the width direction An absorbent article having a substantially arcuate convex shape.

(2) A second aspect of the present invention is the absorbent article according to (1), wherein the widthwise dimension of the first opening-forming sheet is 20 mm or more and 390 mm or less, and the longitudinal dimension is is 20 mm or more and 300 mm or less.

(3) A third aspect of the present invention is the absorbent article according to (1) or (2), wherein the widthwise dimension of the second opening-forming sheet is 20 mm or more and 390 mm or less, It is characterized by having a longitudinal dimension of 10 mm or more and 290 mm or less.

(4) A fourth aspect of the present invention is the absorbent article according to any one of (1) to (3), wherein the depth of the first slit is 50% with respect to the thickness of the absorber. % or more, the dimension in the width direction of the first slit is 5 mm or more and 50 mm or less, and the dimension in the longitudinal direction is 50 mm or more and 600 mm or less.

(5) A fifth aspect of the present invention is the absorbent article according to any one of (1) to (4), wherein in a plan view, from the outside of the first opening-forming sheet in the forward direction, The absorber has a longitudinally extending second slit in the central portion between the pair of first slits over the region where the first space or the second space is provided. It is characterized by being provided.

(6) A sixth aspect of the present invention is the absorbent article according to any one of (1) to (5), wherein, in plan view, from the outside of the first opening-forming sheet in the forward direction, A second channel embossing extending in the width direction is provided over the region where the first space or the second space is provided, and the second channel embossing is a substantially circular shape that is convex in the rearward direction It is characterized by being arcuate.

(7) A seventh aspect of the present invention is the absorbent article according to any one of (1) to (6), wherein the first opening-forming sheet and the second opening-forming sheet have an air-through It is characterized by being composed of non-woven fabric.

ADVANTAGE OF THE INVENTION According to this invention, even when urination is performed repeatedly, the absorbent article which can prevent a back leakage effectively and has a favorable feeling of wearing can be provided.

1 is a plan view of an absorbent article of the present invention; FIG. 2 is a cross-sectional view taken along line Y ₁ -Y ₁ of FIG. 1; FIG. 1 is a plan view of an absorbent article of the present invention; FIG. 1 is a plan view of an absorbent article of the present invention; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In addition, the same reference numerals are given to the same elements throughout the description of the embodiments of the present invention.

In the description of this specification, when the absorbent article 1 is worn means at least one of when the absorbent article 1 is worn and after the absorbent article 1 is worn. The longitudinal direction of the absorbent article 1 is the direction that spans the front and back of the wearer when the absorbent article 1 is worn, and is the direction indicated by Y in the drawing. On the other hand, the width direction of the absorbent article 1 is a direction that is transverse or perpendicular to the longitudinal direction, and is indicated by X in the drawing.
As shown in FIG. 1, the absorbent article 1 of the present invention is divided into approximately three equal parts in the longitudinal direction: a front part a, a crotch part b, and a rear part c. The rear part c is arranged on the rear side (dorsal side) of the wearer when worn, and the crotch part b is positioned between the front part a and the rear part c. Further, the body-side surface is the surface of the front and back surfaces of each member such as the absorbent body 30, which is arranged on the wearer's skin side when worn, and the clothing-side surface is the surface of each member such as the absorbent body 30. Of the front and back surfaces, this is the surface facing away from the wearer's skin when worn.

<Absorbent article>
FIG. 1 is a plan view of an absorbent article 1 of the present invention, and FIG. 2 is a cross-sectional view along Y ₁ -Y ₁ of FIG. The absorbent article 1 of the present invention, as shown in FIGS. and an absorbent body 30 . Since the absorbent article 1 of the present invention can be used over the top sheet of an absorbent article such as a paper diaper as an outer layer like a urine absorbing pad, cost reduction can be realized.

The shape of the absorbent article 1 is not particularly limited, and may be substantially rectangular. preferable. Since the absorbent article 1 has a substantially hourglass shape, the fit in the crotch area when worn is improved, and urine leakage can be suppressed satisfactorily. The lengthwise dimension of the absorbent article 1 is preferably 200 mm or more and 1000 mm or less, and the widthwise dimension is preferably 50 mm or more and 500 mm or less. By setting the dimensions in the longitudinal direction and the width direction of the absorbent article 1 within such ranges, when the absorbent article 1 is stacked with an absorbent article such as a paper diaper as an outer, the mode and size of the absorbent article as the outer are , it is possible to provide the absorbent article 1 that can appropriately prevent urine leakage according to the shape.

[First Aperture Forming Sheet and Second Aperture Forming Sheet]
As shown in FIGS. 1 and 2, the absorbent article 1 of the present invention has a liquid-permeable first opening-forming sheet 50 and a liquid-permeable second opening-forming sheet 50 at the rear part c from the top sheet 20 side to the body side. are provided in order, the front end of the second opening forming sheet 60 is positioned rearward from the front end of the first opening forming sheet 50, and the second opening forming sheet The rear end portion of the first opening forming sheet 50 is adjacent to the first opening forming sheet 50 at the rearward outer side of the rear end portion of the first opening forming sheet 50 , and both width direction ends of the second opening forming sheet 60 are arranged. The part is adjacent to the first opening forming sheet 50 on the width direction outside of both width direction end portions of the first opening forming sheet 50 . Then, the first opening forming sheet 50 is joined to the top sheet 20 at both widthwise end portions and rearward end portions thereof, and is not joined to the topsheet 20 at its forward end portion, thereby forming a pocket shape having an opening in the forward direction. A first space 51 is formed between the first opening-forming sheet 50 and the top sheet 20 , and both widthwise end portions and rearward end portions of the second opening-forming sheet 60 are positioned between the top sheet 20 , and the front end portion is not joined to the top sheet 20 and the first opening forming sheet 50, so that the pocket-shaped second space 61 having an opening in the front direction is formed between the second opening forming sheet 60 and the It is formed between the first opening forming sheets 50 .

Here, the top sheet 20, which allows excreted urine to permeate the absorbent body 30, is generally subjected to hydrophilization treatment with a hydrophilizing agent in order to improve liquid permeability, but urination is repeated. As a result, the hydrophilizing agent falls off, resulting in a decrease in liquid permeability, and urine leaks from the back side (dorsal side) of the absorbent article 1, which is a so-called back leakage. In the present invention, as described above, the first opening-forming sheet 50 and the second opening-forming sheet 60 form the pocket-shaped first space 51 and the second pocket-shaped space that open forward in order from the top sheet 20 side. By providing the two spaces 61, it is possible to effectively prevent back leakage caused by urine traveling backward from the body-side surface of the top sheet 20 whose liquid permeability has decreased due to repeated absorption. It is also possible to effectively prevent post-leakage of loose stools with a high water content (diarrheal stools, watery stools, etc.).

More specifically, the urine that has flowed into the first space 51 is temporarily retained in the first space 51 and quickly transferred to the absorbent body 30 via the top sheet 20 . Urine that has flowed into the second space 61 is temporarily retained in the second space 61 and moves to the first space 51 via the first opening-forming sheet 50 . If only the first space 51 is provided, the amount of urine that can flow into the first space 51 is limited. As a result, urine may permeate the rearward end of the first opening-forming sheet 50, resulting in rear leakage. However, in the present invention, by providing the second space 61 in addition to the first space 51, it is possible to disperse the urine temporarily held in each space and to increase the total amount of space. As a result, backward leakage can be prevented comprehensively.

In addition, since the front end of the second opening-forming sheet 60 is positioned further rearward than the front end of the first opening-forming sheet 50 , urine can easily flow into the second space 61 . , can effectively prevent the back leakage.

As described above, the rearward end of the second opening forming sheet 60 is adjacent to the first opening forming sheet 50 on the rearward outer side of the rearward end of the first opening forming sheet 50 . Both width direction end portions of the second opening forming sheet 60 are adjacent to the first opening forming sheet 50 on the width direction outside of the width direction end portions of the first opening forming sheet 50 . The longitudinal dimension of the first opening-forming sheet 50 with the first space 51 and the second space 61 formed is preferably 20 mm or more and 300 mm or less. is preferably 10 mm or more and 290 mm or less. Further, the widthwise dimension of the first opening-forming sheet 50 and the second opening-forming sheet 60 in the state where the first space 51 and the second space 61 are formed is preferably 20 mm or more and 390 mm or less. .

Furthermore, in plan view, the distance from one widthwise end of the first opening forming sheet 50 and the second opening forming sheet 60 to one widthwise end of the absorber 30, and the distance between the first opening forming sheet 50 and the second opening forming sheet 60 The distance from the other widthwise end of the two opening forming sheets 60 to the other widthwise end of the absorber 30 is preferably equal. In addition, in order to improve absorbency, the rearward end portions of the first opening-forming sheet 50 and the second opening-forming sheet 60 are positioned further forward than the rearward end portion of the absorber 30 in plan view. preferably.

Since the first opening-forming sheet 50 and the second opening-forming sheet 60 have liquid permeability, they are made of a hydrophilic nonwoven fabric, a porous film such as a porous polyethylene film, a foamed film such as a urethane foam, or a laminate thereof. composite sheet. The top sheet 20 may be a single layer or a laminate of a plurality of layers, and may have a large number of through-holes to impart dry touch properties.

In addition, as the hydrophilic nonwoven fabric having the above properties, synthetic fibers such as polypropylene and polyethylene, regenerated fibers such as rayon, and natural fibers such as cotton are used. Although those obtained by known processing methods such as the method and the spunbond method can be used, it is preferable to use an air-through nonwoven fabric that is excellent in liquid permeability and touch.

The basis weights of the first opening-forming sheet 50 and the second opening-forming sheet 60 are preferably 15 g/m ^{2 or more and 200 g/m 2 or} less in terms of workability and strength.

[Top sheet]
The top sheet 20 allows urine to pass quickly toward the absorbent body 30, and is arranged to face the back sheet 40 with the absorbent body 30 interposed therebetween. Since the top sheet 20 is a sheet that comes into contact with the skin, it is soft to the touch and does not irritate the skin. foamed film or a composite sheet in which these are laminated. The top sheet 20 may be a single layer or a laminate of a plurality of layers, and may have a large number of through-holes to impart dry touch properties.

In addition, as the hydrophilic nonwoven fabric having the above properties, synthetic fibers such as polypropylene and polyethylene, regenerated fibers such as rayon, and natural fibers such as cotton are used. A material obtained by a known processing method such as a method or a spunbond method can be used.

The basis weight of the top sheet 20 is preferably 15 g/m ^{2 or more and 200 g/m 2 or} less in terms of workability and strength. To the topsheet 20, lotions, antioxidants, anti-inflammatory ingredients, pH adjusters, antibacterial agents, moisturizing agents, etc. may be applied in order to reduce irritation to the skin.

[Back sheet]
The back sheet 40 is made of a sheet material that is impermeable to liquid and has water impermeability, but it may have moisture permeability to prevent stuffiness. Examples of materials for the back sheet 40 having such properties include thin plastic sheets such as polyethylene sheets and polyethylene-laminated nonwoven fabrics. Further, the basis weight of the backsheet 40 is preferably 15 g/m ² or more and 40 g/m ² or less from the viewpoint of workability and strength.

A fixing member may be provided on the clothing-side surface of the back sheet 40 to prevent slippage during wearing. The base material of the fixing member is not particularly limited, but preferably a mechanical hook tape or an adhesive. Moreover, it may have a release sheet for protecting the fixing member.

[Absorber]
The absorbent body 30 includes absorbent fibers and a super absorbent polymer (Super Absorbent
Polymer, also called SAP) and Absorbent fibers are not particularly limited as long as they are generally used in absorbent articles such as sanitary napkins, paper diapers, and incontinence pads. can be mentioned. Among these, fluff pulp is preferably used from the viewpoint of absorbability. Examples of such fluff pulp include fibrillation of wood pulp, synthetic fibers, polymer fibers, non-wood pulp, and the like. The amount of absorbent fibers in the absorbent body 30 is preferably set to a basis weight of 100 g/m ² or more and 800 g/m ² or less so as not to impair the absorption performance and the touch.

The superabsorbent polymer of the absorbent body 30 is not particularly limited as long as it can absorb bodily fluids and prevent backflow, and may be sodium polyacrylate, polyaspartate, or (starch-acrylic acid) graft. Those formed from materials such as copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers and saponified products thereof can be used. Among these, the sodium polyacrylate type is preferable from the viewpoint of the absorption amount per weight. The amount of superabsorbent polymer in the absorbent body 30 is preferably set to a basis weight of 50 g/m ² or more and 500 g/m ² or less so as not to impair the absorption performance and the touch. Moreover, from the viewpoint of absorption speed and absorption amount, the weight of the superabsorbent polymer with respect to the weight of the absorbent body 30 is preferably 15% by mass or more and 50% by mass or less.

In the absorbent body 30, the absorbent fibers and the superabsorbent polymer are formed by mixing particles of the superabsorbent polymer in the absorbent fibers, or by inserting particles of the superabsorbent polymer between the absorbent fibers. It is preferably in the form of a fixed superabsorbent sheet. For the purpose of preventing leakage of superabsorbent polymer particles and stabilizing the shape of the absorbent body 30, it is preferable to wrap the absorbent body 30 in a carrier sheet. The base material of the carrier sheet may be any material as long as it is hydrophilic, and examples thereof include hydrophilic nonwoven fabrics such as tissues, absorbent papers, and air-laid nonwoven fabrics. When a plurality of carrier sheets are provided, the substrates of the carrier sheets may be the same or different.

In order to properly absorb urine, the absorber 30 has a longitudinal dimension of 150 mm or more and 950 mm or less, a width dimension of 30 mm or more and 480 mm or less, and a thickness of 2 mm or more and 20 mm or less. preferable.

(slit)
As shown in FIG. 1, in plan view, the absorber 30 has a longitudinal direction extending from the front outside of the first opening forming sheet 50 to the region where the first space 51 or the second space 61 is provided. A pair of left and right first slits 80 formed in a substantially straight line is provided. As described above, in order to prevent subsequent leakage when urination is repeated, it is necessary to quickly transfer urine that has flowed into the first space 51 to the absorbent body 30 . Therefore, by providing the first pair of left and right slits 80 in the absorbent body 30, the liquid diffusibility inside the absorbent body 30 is improved, and the absorption speed of the absorbent body 30 is improved. Back leakage can be prevented. In addition, since the absorption rate is improved, it is possible to suppress deterioration of wearing feeling.

In order to improve the absorption speed of the absorber 30 and prevent post-leakage when urination is repeated, the depth of the first slit 80 should be 50% or more and 100% or less of the thickness of the absorber 30. The first slit 80 preferably has a width dimension of 5 mm or more and 50 mm or less and a longitudinal dimension of 50 mm or more and 600 mm or less. When the depth of first slit 80 is 100% of the thickness of absorber 30 , first slit 80 penetrates absorber 30 .
In addition, the functions of the first opening sheet 50, the second opening sheet 60, and the first slit 80 are effectively exhibited, and after-leakage and deterioration of the feeling of wearing are suppressed when urination is repeated. For this purpose, the distance between the rear end of the first opening forming sheet 50 and the first slit 80 is preferably 0 mm or more and 100 mm or less.
Moreover, in order to further improve the liquid diffusibility inside the absorbent body 30, the distance between the pair of left and right first slits 80 in the width direction is preferably 20 mm or more and 200 mm or less.

As shown in FIG. 3 , in order to further improve the absorption speed of the absorber 30 and prevent backward leakage more effectively, in plan view, the first opening forming sheet 50 is removed from the outside in the front direction. The absorber 30 has one second slit 81 extending in the longitudinal direction in the central portion between the pair of first slits 80 over the region where the one space 51 or the second space 61 is provided. Further, it is preferable to provide. The depth of the second slit 81 is 50% or more and 100% or less of the thickness of the absorber 30, the width direction dimension of the second slit 81 is 5 mm or more and 50 mm or less, and the longitudinal dimension is is preferably 50 mm or more and 600 mm or less.

(Channel emboss)
In plan view, a pair of left and right first channel embossments 90 extending in the longitudinal direction from the outside of the first opening forming sheet 50 in the front direction to the region where the first space 51 or the second space 61 is provided, It is provided from the top sheet 20 to the absorbent body 30, and the pair of first channel embossments 90 protrude inward in the width direction in order to efficiently diffuse and guide urine in the longitudinal direction and the width direction. It is preferable to have a substantially circular arc shape.
By providing the pair of left and right first channel embossments 90, the height of the first space 51 can be increased, and the liquid diffusibility on the surface of the top sheet 20 and the liquid diffusivity inside the absorbent body 30 can be improved. is improved, the absorption rate is improved, and after-leakage can be prevented even when urination is repeated. In addition, since the absorption rate is improved, it is possible to suppress deterioration of wearing feeling.

In addition, the functions of the first apertured sheet 50, the second apertured sheet 60 and the first channel embossing 90 are effectively exhibited, and after-leakage and wearing comfort are reduced when urination is repeated. In order to suppress this, the distance between the rear end of the first opening forming sheet 50 and the first channel embossing 90 is preferably 0 mm or more and 100 mm or less.

Furthermore, as shown in FIG. 4, in a plan view, it extends in the width direction from the outside of the first opening forming sheet 50 in the front direction to the area where the first space 51 or the second space 61 is provided. It is preferable that a second channel embossment 91 is provided, and the second channel embossment 91 has a generally arcuate shape that protrudes rearward in order to selectively diffuse and guide urine in the width direction. is preferred.

The first channel embossing 90 and the second channel embossing 91 may partially overlap each other in plan view. Moreover, the 1st channel embossing 90 and the 2nd channel embossing 91 may overlap a part of the 1st slit 80 and the 2nd slit 81 in planar view.

(Three-dimensional gather)
The absorbent article 1 of the present invention preferably has three-dimensional gathers 70 at both ends in the width direction. By providing the three-dimensional gathers 70 at both ends in the width direction, it is possible to effectively prevent leakage of urine and loose feces from the width direction. As the three-dimensional gathers 70, a water-repellent or liquid-impermeable sheet made of hydrophobic fibers, such as a spunbond nonwoven fabric, a meltblown nonwoven fabric, or a polyethylene film, can be used. Moreover, the basis weight of the three-dimensional gathers 70 is preferably 15 g/m ^{2 or more and 100 g/m 2 or} less from the viewpoint of workability and strength.

(Stretchable elastic member)
In addition, the three-dimensional gathers 70 preferably have at least one stretchable elastic member on each of the free end side and the base end side along the longitudinal direction. By providing the stretchable elastic member along the longitudinal direction, the three-dimensional gathers 70 have upright properties and can be deformed according to the body shape of the wearer. can be effectively prevented. As the stretchable elastic member, for example, a polyurethane thread, a belt-like polyurethane film, a thread-like or belt-like natural rubber, or the like is used.
When the three-dimensional gathers 70 are provided, the first opening forming sheet 50 and the second opening forming sheet 60 are positioned at least inside the fixed ends of the three-dimensional gathers 70 in the width direction, and the free ends of the three-dimensional gathers 70 are positioned outside the first opening-forming sheet 50 and the second opening-forming sheet 60 .

Although the present invention has been described using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope of the invention described in the above embodiments. It will be clear to those skilled in the art that improvements are possible. In addition, it is clear from the description of the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

1 Absorbent Article 20 Top Sheet 30 Absorber 40 Back Sheet 50 First Opening Forming Sheet 51 First Space 60 Second Opening Forming Sheet 61 Second Space 70 Solid Gather 80 First Slit 81 Second Slit 90 first channel embossing 91 second channel embossing a front b crotch c rear

Claims (6)

An absorbent article comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body disposed between the topsheet and the backsheet,
The absorbent article is divided into three equal parts in the longitudinal direction: a front part, a crotch part, and a rear part;
In the rear part, a liquid-permeable first opening-forming sheet and a liquid-permeable second opening-forming sheet are provided in order from the top sheet side to the body side,
the forward end of the second opening-forming sheet is positioned further rearward than the forward end of the first opening-forming sheet;
The rearward end of the second opening forming sheet is adjacent to the first opening forming sheet outside the rearward end of the first opening forming sheet in the rearward direction, and is adjacent to the second opening. Both width direction end portions of the forming sheet are adjacent to the first opening forming sheet at width direction outer sides of the width direction end portions of the first opening forming sheet,
Width direction end portions and rearward end portions of the first opening forming sheet are joined to the top sheet, and front end portions are not joined to the top sheet, thereby forming a pocket-shaped second sheet having an opening in the forward direction. A space is formed between the first opening-forming sheet and the top sheet,
Width direction end portions and rearward end portions of the second opening forming sheet are joined to the top sheet, and front end portions are not joined to the top sheet and the first opening forming sheet, thereby a pocket-shaped second space having an opening in the second opening-forming sheet and the first opening-forming sheet;
The first space and the second space are provided in the order of the first space and the second space from the top sheet side,
In the absorber, in a plan view, a linear shape is formed in the longitudinal direction from the outer side of the first opening-forming sheet in the front direction to the region where the first space or the second space is provided. A pair of left and right first slits are provided,
In plan view, a pair of left and right first channel embossments extending in the longitudinal direction from the outside of the first opening forming sheet in the front direction to the region where the first space or the second space is provided, It is provided from the top sheet to the absorbent body,
In plan view, a second channel embossing extending in the width direction is provided from the outside of the first opening forming sheet in the front direction to the region where the first space or the second space is provided. cage,
Each of the pair of first channel embossments has an arc shape that protrudes inward in the width direction ,
The absorbent article, wherein the second channel embossment has an arcuate shape that protrudes backward, and partially overlaps with the pair of first channel embossments in plan view . 2. The absorbent article according to claim 1, wherein the first opening-forming sheet has a widthwise dimension of 20 mm or more and 390 mm or less and a longitudinal dimension of 20 mm or more and 300 mm or less. 3. The absorbent article according to claim 1, wherein the second opening-forming sheet has a widthwise dimension of 20 mm or more and 390 mm or less and a longitudinal dimension of 10 mm or more and 290 mm or less. The depth of the first slit is 50% or more of the thickness of the absorber, the width dimension of the first slit is 5 mm or more and 50 mm or less, and the longitudinal dimension is 50 mm or more and 600 mm or less. The absorbent article according to any one of claims 1 to 3, wherein In a plan view, the absorbent body has a pair of first slits extending from the front outer side of the first opening-forming sheet to the region where the first space or the second space is provided. 5. The absorbent article according to any one of claims 1 to 4, wherein a longitudinally extending second slit is provided in the central portion between the two. The absorbent article according to any one of claims 1 to 5 , wherein said first opening-forming sheet and said second opening-forming sheet are made of an air-through nonwoven fabric.

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