JP2021029265A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of suppressing turnaround of watery feces from an absorber.SOLUTION: An absorbent article worn on the wearer's inseam includes an absorber, and a plurality of liquid permeable sheets for covering a wearer side surface of the absorber. Each of the plurality of liquid permeable sheets has a ventilation resistance in the range of 0.0058-0.0289 kPa-sec/m, and at least one of the plurality of liquid permeable sheets has a ventilation resistance in the range of 0.0183-0.0289 kPa-sec/m.SELECTED DRAWING: Figure 6

Description

The present invention relates to absorbent articles such as disposable diapers and sanitary napkins.

Conventionally, the absorbent article is provided with an absorbent body extending in the longitudinal direction connecting the abdominal side and the back side of the wearer, for example, as disclosed in Patent Document 1. This absorber absorbs excreted liquids such as urine and menstrual blood. By arranging this absorber between the liquid-permeable top sheet and the liquid-impermeable back sheet, the absorbent article absorbs the urine excreted in the top sheet by the absorber and absorbs it by the absorber. The back sheet prevents the leakage of urine.

International Publication No. 2016/114209

By the way, as the liquid-permeable material constituting the top sheet, for example, a non-woven fabric is used. A non-woven fabric is suitable as a material for a top sheet that comes into contact with the wearer's skin because it can be soft to the touch. However, in addition to urine and menstrual blood, stool and watery stool are excreted from the wearer. Stool is mostly solid, and watery stool is a mixture of solid and liquid. And the absorber of the absorbent article cannot absorb the solid matter. Therefore, when the wearer of the absorbent article excretes stool or watery stool, the absorbent article is replaced.

When exchanging an absorbent article, it is necessary to carry out the excrement work so as not to drop the excrement remaining on the top sheet from the absorbent article. However, in the case of watery stool, since the liquid is mixed with the solid substance, it is less likely to be absorbed by the absorber when compared with urine. For this reason, watery stools, when compared to urine and stool, may revert and leak from the absorber when the absorbent article is removed from the wearer.

Therefore, an object of the present invention is to provide an absorbent article capable of suppressing the reversion of watery stool from the absorber.

In order to solve the above problems, in the present invention, a plurality of liquid-permeable sheets covering the wearer-side surface of the absorber are all provided with a ventilation resistance in the range of 0.0058 to 0.0289 kPa · sec / m. At least one of the plurality of liquid permeable sheets had a ventilation resistance in the range of 0.0183 to 0.0289 kPa · sec / m.

More specifically, the present invention comprises an absorbent article worn in the inseam of a wearer, comprising an absorber and a plurality of liquid permeable sheets covering a wearer-side surface of the absorber. All of the liquid permeable sheets have a ventilation resistance in the range of 0.0058 to 0.0289 kPa · sec / m, and at least one of the plurality of liquid permeable sheets has a ventilation resistance of 0.0183. It is in the range of ~ 0.0289 kPa · sec / m.

Of the plurality of liquid-permeable sheets, the ventilation resistance of the sheet closest to the absorber is in the range of 0.0183 to 0.0289 kPa · sec / m, and the ventilation resistance of the other sheets is 0.
.. It may be in the range of 0058 to 0.0289 kPa · sec / m.

Further, among the plurality of liquid permeable sheets, the static friction coefficient of the sheet closest to the wearer may be in the range exceeding 0.34.

Further, the absorber has at least two or more layers, and the layer on the wearer side may contain particles of SAP, which is a highly absorbent polymer, in a larger amount than the other layers.

With the above-mentioned absorbent article, the absorbability of watery stool can be improved.

FIG. 1 is a perspective view of a diaper according to an embodiment. FIG. 2 is an exploded perspective view of the diaper. FIG. 3 is a cross-sectional view of a diaper in a non-wearing state when the center in the longitudinal direction is cut along the width direction. FIG. 4 is a diagram illustrating a test method for verifying the reversion of watery stool. FIG. 5 is a diagram showing the types of core wrap sheets of the test sample prepared in the verification. FIG. 6 is a diagram showing the test results. FIG. 7 is a diagram showing the measurement results of the ventilation resistance. FIG. 8 is a diagram showing the measurement results of the friction coefficient.

Hereinafter, the absorbent article according to the embodiment of the present invention will be described with reference to the drawings. The configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

<Embodiment>
In the present embodiment, the tape-type disposable diaper (an example of the "absorbent article" in the present application, hereinafter simply referred to as "diaper") faces the front body and the back, which are arranged to face the abdomen of the wearer. The direction connecting the back body to be arranged is the longitudinal direction. An inseam placed in the wearer's inseam (opposed to the crotch) between these front bodies (one side in the longitudinal direction) and the back body (other side in the longitudinal direction) (center in the longitudinal direction). The part is located. In addition, when the disposable diaper is worn on the wearer (hereinafter abbreviated as "wearing state"), the side facing the wearer's skin (inside when worn) is the skin surface side, and the opposite side of the skin surface side. (Outside when attached) is the non-skin side. Further, the direction connecting the skin surface side and the non-skin surface side is the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is the width direction. In addition, viewing from the thickness direction is defined as a plan view.

FIG. 1 is a perspective view of a diaper according to the present embodiment. The diaper 1 is located in the inseam area 1B, which is a part corresponding to the inseam area covering the wearer's genital area in the worn state, and the front side of the inseam area 1B, and is a part corresponding to the wearer's front body, the front body area 1F. And the back body region 1R, which is located behind the inseam region 1B and corresponds to the back body of the wearer. Tapes 2L and 2R that can be attached to the front patch 2F provided on the non-skin surface side of the front body area 1F are provided on the left and right edges of the back body area 1R. Therefore, in the diaper 1, when the tapes 2L and 2R are attached to the front patch 2F with the front body area 1F arranged on the ventral side of the wearer and the back body area 1R arranged on the back side of the wearer. , It is fixed to the wearer's body in a state surrounding the wearer's abdominal circumference and thighs. Since the diaper 1 is fixed to the wearer's body in such a form, the wearer can walk while wearing the diaper 1. Examples of the wearer include an elderly person or an adult who excretes about 150 ml of urine.

In the diaper 1, a mat 6 capable of absorbing and holding a liquid is mainly arranged around the inseam region 1B. Further, in the diaper 1, in order to suppress the formation of a gap that serves as a liquid outflow route between the diaper 1 and the wearer's skin, three-dimensional gathers 3BL, 3BR are formed on the portion surrounding the wearer's thigh. Is provided, and a waist gather 3R is provided at a portion surrounding the wearer's abdominal circumference. The three-dimensional gathers 3BL and 3BR and the waist gathers 3R come into close contact with the wearer's skin due to the elastic force of the rubber thread. Therefore, the liquid excreted from the wearer's genital area is absorbed by the mat 6 of the diaper 1 with almost no leakage from the diaper 1.

FIG. 2 is an exploded perspective view of the diaper 1. Further, FIG. 3 is a cross-sectional view of the diaper 1 in the non-wearing state when the center in the longitudinal direction is cut along the width direction. The diaper 1 has a cover sheet 4 that forms an outer surface when worn. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance with 4KL and 4KR constricted in a portion corresponding to a long side, and forms an exterior surface of the diaper 1. The constrictions 4KL and 4KR are provided at locations where the wearer's thighs are located. The cover sheet 4 is provided for reinforcing the back sheet 5 and improving the feel. For example, in order to suppress leakage of excrement, a non-woven fabric made of a liquid-impermeable thermoplastic resin may be used as the material thereof. it can. Examples of the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, and may have a multi-layer structure having an inner cover sheet and an outer cover sheet.

The diaper 1 has a back sheet 5, a mat 6, and a top sheet 7 that are sequentially laminated on the skin surface side of the cover sheet 4. The back sheet 5, the mat 6, and the top sheet 7 are all sheet-like members having a substantially rectangular appearance, and are sequentially laminated on the cover sheet 4 in a state in which the longitudinal direction coincides with the longitudinal direction of the cover sheet 4. .. Like the cover sheet 4, the back sheet 5 is a sheet formed of a liquid-impermeable thermoplastic resin as a material in order to suppress leakage of excrement. Further, the top sheet 7 is a sheet-like member arranged on the skin surface side of the wearer so as to cover the water absorption surface of the mat 6. The top sheet 7 has liquid permeability in a part or all of it. Therefore, when the diaper 1 is worn, the liquid excreted from the wearer enters the mat 6 through the top sheet 7 which can come into contact with the wearer's skin, and is absorbed there. For example, a woven fabric, a non-woven fabric, or a porous film can be used as a material for the top sheet 7. The top sheet 7 may have hydrophilicity.

The back sheet 5, the mat 6, and the top sheet 7 all extend from the front body region 1F to the back body region 1R. Therefore, when the cover sheet 4 on which the back sheet 5, the mat 6 and the top sheet 7 are laminated covers the wearer's pubic area, both ends of the back sheet 5, the mat 6 and the top sheet 7 in each longitudinal direction are the wearer. It will be located on the ventral and dorsal sides of the. That is, the genital area of the wearer is covered with the mat 6 from the ventral side to the dorsal side of the wearer. Therefore, regardless of whether the wearer excretes the liquid from the body in either the abdomen-down posture or the back-down posture, the excreted liquid comes into contact with the mat 6 via the top sheet 7. It will be.

Further, the diaper 1 has elongated strip-shaped side sheets 8L and 8R for forming the above-mentioned three-dimensional gathers 3BL and 3BR. The side sheets 8L and 8R are liquid-impermeable sheets provided on the long side portion of the top sheet 7. Similar to the three-dimensional gathers 3BL and 3BR of the diaper 1, the side seats 8L and 8R are provided with 8KL and 8KR constricted at the position where the wearer's thigh is located. The rubber threads 8EL and 8ER are woven into the side sheets 8L and 8R along the longitudinal direction. Therefore, the side sheets 8L and 8R are attracted in the longitudinal direction by the contraction force of the rubber threads 8EL and 8ER when the diaper 1 is in the mounted state, that is, when the diaper 1 is in the U-shaped side view. It becomes a three-dimensional gather that rises from and prevents the outflow of liquid.

Further, the thread rubber 9ER for forming the waist gather 3R described above is provided between the back sheet 5 and the top sheet 7 at a position further back from the end of the mat 6. The rubber thread 9ER is provided between the back sheet 5 and the top sheet 7 in a direction in which the longitudinal direction, which is the expansion and contraction direction, is the left-right direction of the diaper 1. Therefore, when the tapes 2L and 2R provided on the left and right sides of the rubber thread 9ER are attached to the front patch 2F on the ventral side of the wearer, the rubber thread 9ER exerts a contraction force to give the diaper 1 to the wearer. It is brought into close contact to prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference. The cover sheet 4 is also provided with thread rubbers 4SL and 4SR along the longitudinal direction to prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference. The rubber threads 4SL and 4SR are provided at appropriate positions in an appropriate number determined according to the elastic force (contraction force) required for the design of the diaper 1.

The mat 6 is provided with water in the gaps between short fibers of cellulose-based fibers such as pulp fibers, rayon fibers, or cotton fibers, and short fibers in which synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate are hydrophilized. It has a structure that retains granular absorbent resin such as SAP (Highly Absorbent Polymer), which is a hydrophilic polymer having a crosslinked structure that can be absorbed and retained. Therefore, in the mat 6, the volume fluctuation of the absorbent resin before and after absorbing the liquid is basically performed in the short fibers that hold the absorbent resin in the gap. Therefore, when the entire mat 6 is viewed from a bird's-eye view, it can be said that the expansion coefficient of the thickness of the mat 6 that has absorbed the liquid is not as large as the expansion coefficient of the absorbent resin itself.

The SAP particles of the present embodiment refer to particles of a resin composition containing SAP. The term "resin composition containing SAP" as used herein refers to both a composition consisting of SAP alone and a composition containing SAP as a main component and containing other substances to the extent that it does not adversely affect water absorption. Is a concept that includes. Examples of the "other substance" include additives (surface modifiers added for the purpose of hydrophobizing the particle surface), unreacted monomers remaining during the synthesis of SAP, and the like.

By the way, as shown in FIG. 3, the mat 6 of the above embodiment has a core 6C (an example of an "absorbent" in the present application) in which SAP is mixed with crushed pulp (so-called "fluff pulp"). It is wrapped with a core wrap sheet 6W. In the diaper 1, the skin surface side surface of the core 6C (corresponding to the “wearer side surface” in the present application) is wrapped in a part of the core wrap sheet 6W that wraps the core 6C and the core wrap sheet 6W. It is covered with a laminated portion in which a top sheet 7 covering the rolled core 6C is overlapped. Since the core wrap sheet 6W and the top sheet 7 are both liquid-permeable sheets, the laminated portion has liquid permeability.

In the diaper 1 of the present embodiment, the core wrap sheet 6W and the top sheet 7 covering the skin surface side of the core 6C both have a ventilation resistance within the range of 0.0058 to 0.0289 kPa · sec / m. The ventilation resistance of any one of them is in the range of 0.0183 to 0.0289 kPa · sec / m. This ventilation resistance is a value measured by a ventilation tester (KES-FB-AP1) manufactured by Kato Tech Co., Ltd. Therefore, the diaper 1 of the present embodiment has the following superior ability to suppress the reversion of watery stool from the absorber as compared with the diaper of the comparative example in which the ventilation resistance or the coefficient of static friction is out of this range. ing. The reversion means that the water absorbed by the pulp or SAP exudes again due to pressurization or the like.

<Verification of reversion>
FIG. 4 is a diagram illustrating a test method for verifying the reversion of watery stool. In this verification, a mat having a width of 280 mm and a length of 560 mm was used as a test sample corresponding to the mat 6. The location where the reagent was dropped was the second region from the dorsal side of the region in which the absorber was divided into five equal parts in the longitudinal direction. Drop 200 ml of reagent and allow the test sample to absorb the reagent. Then, 10 minutes after the reagent is dropped, as shown in FIG. 4B, a square filter paper is placed on the test sample, a 100 mm square acrylic plate is placed on top of the test sample, and a weight of 20 kg is placed on the test sample. Then, as shown in FIG. 4C, the state of being pressurized with a weight is held for 5 minutes. Then, as shown in FIG. 4D, the square filter paper is weighed with an electronic balance, and the amount of change in the weight of the square filter paper before and after this verification is measured. In this verification, the test sample with a relatively small amount of change is an excellent one with a small amount of reversion.

In this verification, eight types of test samples were prepared and the amount of reversion of each was compared. The eight types of test samples have a core wrap sheet that wraps the core and a sheet that is stacked on the core wrap sheet in a staggered manner, and all have the same core. The core is a pulp having a basis weight of 260 g / cm ² (width 280 mm and length 560 mm) containing no SAP. FIG. 5 is a diagram showing the types of core wrap sheets of the test sample prepared in this verification.

In FIG. 5, among the eight types of test samples, the one corresponding to the combination of the mat 6 and the top sheet 7 of the above embodiment is referred to as “Examples 1 to 5”, and the one corresponding to the comparative example is referred to as “Comparative Examples 1 to 5”. 3 ".

In Examples 1 to 3, a non-woven fabric prepared by an air-through method is used for the core wrap sheet and the sheet stacked on the core wrap sheet. The air-through type non-woven fabric is formed by carding (opening) the fibers as a raw material and then heat-sealing them by hot air treatment. Basis weight of the core wrap sheets, Examples 1 and 3 is 20.0 g / ^{m 2,} the second embodiment which is 22.0 g / ^{m 2.}

Further, in Examples 4 and 5, a non-woven fabric prepared by a span bond method is used for the core wrap sheet and the sheet stacked on the core wrap sheet. The basis weight of the core wrap sheet is 18.0 g / m ² in Example 4 and 17.5 g / m ² in Example 5. The spunbonded non-woven fabric is formed by carding the fibers as a raw material, entwining the fibers with high-pressure water to form a sheet, and drying the fibers.

Further, in Comparative Examples 1 to 3, pulp is used for the core wrap sheet and the sheet laminated on the core wrap sheet. Basis weight of the pulp, are comparative examples 1 19.5 g / ^{m 2,} Comparative Example 2 is 16.0 g / ^{m 2,} Comparative Example 3 is 14.0 g / ^{m 2.}

The reagents used in this verification were ion-exchanged water containing bentonite and stirred, and those within 3 days after preparation were used as simulated products of watery stool. The reagent has a water content of 94% by weight (for example, 1 kg of reagent is prepared by mixing 940 g of water and 60 g of bentonite).

When the amount of reversion of watery stool was verified for these eight types of test samples, better results were obtained in all of Examples 1 to 5 than in Comparative Examples 1 to 3. FIG. 6 is a diagram showing the test results.

As can be seen from FIG. 6, in all of Comparative Examples 1 to 3, the amount of reversion of the reagent was at least 14.3 g or more on average. On the other hand, in each of Examples 1 to 5, the amount of reversion of the reagent was 9.9 g or less on average. In particular, in Examples 4 and 5 in which the non-woven fabric prepared by the spunbond method was used for the core wrap sheet, the amount of reagent reversion was 5.7 g at the maximum on average, which was watery stool as compared with Comparative Examples 1 to 3. It was confirmed that the amount of reversion of was extremely small.

Below, the physical characteristics of the core wrap sheet and each material used as the sheet overlaid on the core wrap sheet were confirmed in the above test sample, and the confirmation results are shown below. Whether or not the watery stool stays on the mat without returning to the surface of the core wrap sheet is considered to be largely influenced by the size of the fine openings formed by the material covering the surface of the core. Therefore, in this confirmation, the air permeability (ventilation resistance), which is considered to have a direct correlation with the size of the opening, was confirmed.

<Breathability>
In this verification, the ventilation resistance of the core wrap sheet was measured using a breathability tester (KES-F8-AP1) manufactured by Kato Tech Co., Ltd. FIG. 7 is a diagram showing the measurement results of the ventilation resistance.

As can be seen from FIG. 7, in Examples 1 to 5, it was confirmed that the ventilation resistances of the top sheet and the core wrap sheet were each within the range of 0.0058 to 0.0289 kPa · sec / m. It was. Further, in Examples 1 to 5, it was confirmed that the ventilation resistance of the core wrap sheet was higher than the ventilation resistance of the top sheet, and the ventilation resistance was in the range of 0.0183 to 0.0289 kPa · sec / m. .. On the other hand, in Comparative Examples 1 to 3, the ventilation resistance is out of this range. From this, the ventilation resistance of the liquid-permeable sheet covering the skin surface side of the core is in the range of 0.0058 to 0.0289 kPa · sec / m, and the ventilation resistance of any of the sheets is high. It can be seen that within the range of 0.0183 to 0.0289 kPa · sec / m, the watery stool stays on the mat without returning to the surface of the core wrap sheet. Therefore, from this confirmation result, the ventilation resistance of the sheet covering the skin surface side surface of the absorber is in the range of 0.0058 to 0.0289 kPa · sec / m as in the diaper 1 of the above embodiment, and For any sheet, the absorbent article having a ventilation resistance in the range of 0.0183 to 0.0289 kPa · sec / m reverts watery stool from the absorber as compared with the absorbent article outside this range. Is recognized to be suppressable.

<Static friction coefficient>
Next, the confirmation result of the coefficient of static friction on the surface of the top sheet will be described. The coefficient of static friction was measured using a surface measuring machine (Tribo Gear TYPE: 14DR) manufactured by Shinto Kagaku Co., Ltd. The measuring method was based on JIS K7125. In this confirmation, the liquid flow on the surface of the top sheet was verified. In the verification of liquid flow, a mat with a width of 280 mm and a length of 560 mm was used, and the mat was placed on a slope with an inclination angle of 30 degrees so that the longitudinal direction coincided with the vertical direction of the slope. 50 g of a stool-simulating reagent was dropped on the mat at a position 450 mm from the lower end of the mat. Then, in this verification, the distance (diffusion length: average value of 5 times) through which the reagent simulating watery stool flows on the mat surface and the amount absorbed by the mat were confirmed. In this verification, all 50 g of the reagent is absorbed by the mat, and the one having a shorter diffusion length is superior. FIG. 8 is a diagram showing the measurement results of the coefficient of static friction.

As can be seen from FIG. 8, in all cases where the coefficient of static friction on the surface of the top sheet was 0.59 or more, the diffusion range of the reagent remained within 450 mm, and the reagent did not flow out to the outside of the mat. On the other hand, when the coefficient of static friction on the surface of the top sheet was 0.34 or less, the reagent flowed over a distance longer than 450 mm, and the reagent flowed out of the mat. From this, if the static friction coefficient of the top sheet surface exceeds 0.34 (greater than 0.34), water has a static friction coefficient of 0.34 or less as compared with an absorbent article. It is recognized that the absorbency is excellent when the stool is excreted. Further, when the coefficient of static friction is 0.59 or more, it is recognized that the absorbability when watery stool is excreted is more excellent. Further, when the coefficient of static friction exceeds 0.74, it is recognized that the absorbability when watery stool is excreted is further excellent. Further, when the coefficient of static friction is 0.98 or more, it is recognized that the absorbability when watery stool is excreted is further excellent.

The diaper 1 has a plurality of liquid-permeable sheets that cover the wearer-side surface of the core 6C, and the ventilation resistance of the sheet closest to the core 6C is the other sheet among the plurality of liquid-permeable sheets. It may be higher than the ventilation resistance of. According to this, the possibility that the liquid that has passed through the sheet and is absorbed by the core 6C stays in the core 6C and returns to the sheet can be further suppressed. For example, if the ventilation resistance of the core wrap sheet 6W is higher than the ventilation resistance of the top sheet 7 among the core wrap sheet 6W and the top sheet 7 that cover the surface of the core 6C on the skin surface side, the top sheet 7 and the core The liquid that has passed through the wrap sheet 6W and is absorbed by the core 6C stays in the core wrap sheet 6W, and the possibility that the liquid of the core 6C reverts to the core wrap sheet 6W is reduced.

Further, the diaper 1 may have a core 6C having at least two or more layers, and the layer on the skin surface side may contain a larger amount of SAP particles than the other layers. If the layer on the skin surface side of the core 6C having two or more layers contains a larger amount of SAP particles than the other layers, the moisture absorption in the skin surface side portion of the core 6C becomes high, so that the matte It is possible to further suppress the reversion of watery stool from 6.

Further, in the above embodiment, the tape-type disposable diaper has been exemplified, but it can also be applied to other forms of absorbent articles. Examples of such absorbent articles include various forms of absorbent articles with gathers such as pants-type disposable diapers, urine pads, and light incontinence pads, and flat absorbent articles without gathers.

1 ・ ・ Diaper 1B ・ ・ Inseam area 1F ・ ・ Front body area 1R ・ ・ Back body area 2F ・ ・ Front patch 2L, 2R ・ ・ Tape 3BL, 3BR ・ ・ Three-dimensional gather 3R ・ ・ West gather 4 ・ ・ Cover sheet 4KL , 4KR ・ ・ Constriction 5 ・ ・ Back sheet 6 ・ ・ Mat 6C ・ ・ Core 6W ・ ・ Core wrap sheet 7 ・ ・ Top sheet 8 ・ ・ Side sheet 8KL, 8KR ・ ・ Constriction 4SL, 4SR, 8EL, 8ER, 9ER ・・ Thread rubber

Claims (4)

An absorbent article that is worn on the wearer's inseam.
Absorber and
A plurality of liquid-permeable sheets covering the wearer-side surface of the absorber are provided.
The plurality of liquid permeable sheets all have a ventilation resistance in the range of 0.0058 to 0.0289 kPa · sec / m.
At least one of the plurality of liquid permeable sheets has a ventilation resistance in the range of 0.0183 to 0.0289 kPa · sec / m.
Absorbent article. Among the plurality of liquid permeable sheets, the ventilation resistance of the sheet closest to the absorber is higher than the ventilation resistance of the other sheets, and the ventilation resistance of the sheet closest to the absorber is 0.0183 to 0. It is in the range of 0289 kPa · sec / m, and the ventilation resistance of the other sheet is in the range of 0.0058 to 0.0289 kPa · sec / m.
The absorbent article according to claim 1. Among the plurality of liquid permeable sheets, the static friction coefficient of the sheet closest to the wearer is in the range exceeding 0.34.
The absorbent article according to claim 1 or 2. The absorber has at least two or more layers, and the layer on the wearer side contains particles of SAP, which is a highly absorbent polymer, in a larger amount than the other layers.
The absorbent article according to any one of claims 1 to 3.

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