JP2020103397A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which has high absorptive capacity and diffusion capacity even being formed into a thin article and achieves preferable wearing feeling.SOLUTION: An absorbent article 10 comprises a front region A, a center region B, and a rear region C along a longitudinal direction Y. An absorbent layer 60 comprises a first absorber 40 and a second absorber 50 from a top sheet 20 side, the first absorber 40 extends from the front region A to the rear region C in plan view and contains a fiber assembly formed of first tows and a first high absorptive polymer being fastened and carried to fibers of the fiber assembly formed of first tows; the second absorber 50 is provided on the center region B in plan view and contains a fiber assembly formed of second tows and a second high absorptive polymer being fastened and carried to fibers of the fiber assembly formed of the second tows; a density of the second absorber 50 without a load is higher than a density of the first absorber 40 without a load, and a liquid diffusion sheet 70 having an almost equal size to the first absorber 50 is arranged between the first absorber 40 and the second absorber 50.SELECTED DRAWING: Figure 3

Description

The present invention relates to absorbent articles.

Generally, an absorbent article is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber arranged between the top sheet and the back sheet, whereby urine, etc. Body fluid is absorbed by the absorber through the top sheet. There are various types of these absorbent articles, regardless of whether they are for adults or infants, such as tape-type diapers, pants-type diapers, urine absorbing pads, and light incontinence pads. ..

Regarding the absorbent body that constitutes these absorbent articles, a method of using fluff pulp and a super absorbent polymer (also referred to as Super Absorbent Polymer, also called SAP) in combination has been widely used. The absorber tended to be thicker. Therefore, a so-called super absorbent sheet (also called a SAP sheet) which does not contain fluff pulp and is composed of a non-woven fabric as a base material and a super absorbent polymer for the purpose of improving the wearing feeling, appearance and touch when worn. In some cases, the above is used as an absorber, and various studies have been made on the super absorbent sheet.

As a high-absorption sheet that has been studied so far, for example, in Patent Document 1, a first sheet and a second sheet to which an adhesive is applied, and a high-absorption sheet arranged between the first sheet and the second sheet are provided. A polymer, and the application of the adhesive is intermittent in at least a portion corresponding to a plurality of regions on the second sheet, and the first sheet faces the first sheet on both sides in the width direction of the superabsorbent polymer. Disclosed is a superabsorbent sheet characterized in that an adhesive is continuously applied to the site in the longitudinal direction, and the superabsorbent polymer is arranged in stripes along the longitudinal direction.

Further, Patent Document 2 discloses an absorbent body in which two superabsorbent sheets are folded along the longitudinal direction, and the two superabsorbent sheets are arranged so that their folds face each other.

By the way, when the fluff pulp and the super-absorbent polymer are used together as in the conventional case, the absorber is often prepared by laminating the fluff pulp short fibers and the super-absorbent polymer on a laminating drum. Then, as an embodiment of an absorbent body that does not use fluff pulp, in addition to the above-described high-absorbency sheet, a tow (fiber bundle) composed of a filamentary long fiber web is used instead of the fluff pulp short fiber product. It has been proposed to use an opened fiber (hereinafter referred to as a tow fiber aggregate) as an absorber.
By using a fiber aggregate made of tow instead of fluff pulp, an absorbent body having excellent flexibility and flexibility can be obtained. In addition, by using an absorbent body having excellent flexibility and flexibility, it is possible to make wearing of the absorbent article under clothes inconspicuous and improve fit.

JP, 2006-320443, A JP, 2008-295645, A

However, in the superabsorbent sheets described in Patent Documents 1 and 2, and many other superabsorbent sheets, the non-woven fabric and the superabsorbent polymer are fixed using a hot melt adhesive, so that the skin feels hard. As a result, there is a problem that the wearing feeling is deteriorated, and the fitting property cannot be obtained, which causes a feeling of strangeness and a sufficient wearing feeling cannot be obtained. In addition, compared to conventional absorbent bodies composed of fluff pulp and superabsorbent polymer, most of the superabsorbent sheets have the superabsorbent polymer fixed to the non-woven fabric by an adhesive so that the superabsorbent polymer is Since it is present at a high density, it takes a long time for absorption and is inferior in diffusibility of urine, so that it was not sufficiently satisfactory from the viewpoint of absorbability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an absorbent article that has a high absorbing ability and a high diffusing ability even when it is thin and has a good wearing feeling.

The inventor of the present invention, as a result of intensive studies, found that an absorbent article having excellent absorbing ability and diffusing ability can be obtained even if it is thin by setting the absorbing layer to a specific configuration and density, and the present invention I arrived.
That is, the present invention is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent layer between the top sheet and the back sheet, wherein the absorbent article is , A front region along the longitudinal direction, a central region, and a rear region, the absorbent layer has a first absorbent body and a second absorbent body from the top sheet side, the first absorbent body, The first high-absorbent polymer, which is located from the front region to the rear region in a plan view, is fixedly carried on the fibers of the first tow fiber and the fibers of the first tow fiber assembly. And the second absorbent body is located in the central region in a plan view, and is fixedly supported on the fiber of the second tow and the fiber of the second tow. A second high-absorbent polymer, the unloaded density of the second absorbent is higher than the unloaded density of the first absorbent, the first absorbent and the second absorbent Between the first absorbent body and the liquid absorbent sheet having substantially the same size as the first absorbent body.

The basis weight of the fiber aggregate comprising the first tow, 20 g / ^{m 2} or more 100 g / ^{m 2} or less, wherein the first superabsorbent polymer has a basis weight of 60 g / ^{m 2} or more 500 g / ^{m 2} It is preferably not more than 0.6 times and not more than 5.0 times the basis weight of the fiber assembly made of the first tow.

The supporting rate of the first superabsorbent polymer on the fiber assembly composed of the first tow is preferably 70% or more.

The constituent fibers of the fiber assembly composed of the first tow are preferably composed of cellulose acetate.

The density without load of the first absorber is preferably 2 kg/m ³ or more and 20 kg/m ³ or less.

The basis weight of the fiber aggregate comprising the second tow, 20 g / ^{m 2} or more 100 g / ^{m 2} or less, the second superabsorbent polymer has a basis weight of 60 g / ^{m 2} or more 500 g / ^{m 2} It is preferably not more than 0.6 times and not more than 5.0 times the basis weight of the fiber assembly composed of the second tow.

The supporting rate of the second superabsorbent polymer on the fiber assembly composed of the second tow is preferably 70% or more.

The constituent fibers of the fiber assembly composed of the second tow are preferably composed of cellulose acetate.

The density of the second absorbent body under no load is preferably 20 kg/m ³ or more and 200 kg/m ³ or less.

ADVANTAGE OF THE INVENTION According to this invention, even if it is thin, an absorbent article with a high absorptivity and a high diffusivity and a good wearing feeling can be provided.

It is a top view showing one embodiment of an absorptive article of the present invention. FIG. 2 is a sectional view taken along line XX in FIG. 1. It is a YY sectional view in FIG. It is a figure which shows the method of measuring the carrying rate of the superabsorbent polymer on the fiber assembly made of tow.

<Absorptive article>
Examples of the absorbent article according to the embodiment of the present invention include a light incontinence pad, but the absorbent article of the present invention is not limited to this, and a light incontinence liner, a sanitary napkin, and other absorbent articles. It may be an article.
In addition, in this specification, the longitudinal direction of the absorbent article is a direction extending in front of and behind the wearer when the absorbent article is worn, and is a direction indicated by a symbol Y in the drawing. In addition, the width direction of the absorbent article is a direction that is lateral or orthogonal to the longitudinal direction, and is the direction indicated by the symbol X in the drawing. Further, in the description of the present specification, the body side surface refers to the surface of the front and back surfaces of each member that is arranged on the skin side of the wearer when worn, and the clothing side surface refers to the front and back surfaces of each member. Of these, the surface that faces away from the skin side of the wearer when worn.

1 is a plan view showing an absorbent article 10 of the present embodiment, FIG. 2 is a sectional view taken along line XX in FIG. 1, and FIG. 3 is a sectional view taken along line YY in FIG.
As shown in FIG. 2, the absorbent article 10 includes a liquid-permeable topsheet 20 (hereinafter simply referred to as a topsheet 20) and a liquid-impermeable backsheet 30 (hereinafter simply referred to as a backsheet 30). And an absorbent layer 60 between the topsheet 20 and the backsheet 30, and the absorbent layer 60 has a first absorbent body 40 and a second absorbent body 50 from the topsheet 20 side.
Moreover, as shown in FIG. 1, the absorbent article 10 includes a front region A, a central region B, and a rear region C along the longitudinal direction Y. The central area B corresponds to the urination area.

The dimension of the absorbent article 10 in the longitudinal direction Y is preferably 100 mm or more and 600 mm or less, and the dimension of the absorbent article 10 in the width direction X (the dimension of the portion showing the maximum value) is preferably 30 mm or more and 200 mm or less. By adjusting the dimensions of the absorbent article 10 within the above range, the absorbent article 10 suitable for a light incontinence pad, a light incontinence liner, a sanitary napkin, a relatively small urine absorbing pad, and the like can be obtained.
Hereinafter, details of the configuration of the absorbent article 10 will be described.

[Top sheet]
The topsheet 20 allows body fluid to quickly pass toward the absorbent layer 60, and is arranged so as to face the backsheet 30 with the absorbent layer 60 interposed therebetween. Since the top sheet 20 is a sheet that comes into contact with the skin, it has a soft touch and does not cause irritation to the skin. The hydrophilic non-woven fabric, an apertured film such as an apertured polyethylene film, or a foamed urethane foam. It is formed from a 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 a large number of through holes may be formed to provide dry touch.

Further, as the hydrophilic non-woven fabric having the above-mentioned properties, synthetic fibers such as polypropylene and polyethylene, regenerated fibers such as rayon, natural fibers such as cotton, thermal bonding method, air through method, spun lace method, A product obtained by a known processing method such as a spunbond method can be used.

From the viewpoint of workability and strength, the basis weight of the top sheet 20 is preferably 13 g/m ² or more and 40 g/m ² or less. The topsheet 20 may be coated with a lotion, an antioxidant, an anti-inflammatory component, a pH adjusting agent, an antibacterial agent, a moisturizing agent or the like in order to reduce irritation to the skin.

[Backsheet]
As the back sheet 30 used in the present invention, a sheet material having liquid impermeability and water blocking property is used, but it may have moisture permeability to prevent stuffiness. As a material of the back sheet 30 having such characteristics, for example, a thin plastic sheet such as a polyethylene sheet or a polyethylene laminated nonwoven fabric can be used. The basis weight of the backsheet 30 is preferably 15 g/m ² or more and 60 g/m ² or less from the viewpoint of workability and strength.

Although not shown, the surface of the back sheet 30 on the clothing side may be provided with an adhesive layer for fixing the absorbent article 10 to underwear or the like when worn. When the absorbent article 10 has a pressure-sensitive adhesive layer, it may have a release sheet for protecting the pressure-sensitive adhesive layer, and this release sheet is partially bonded to the packaging sheet of the absorbent article 10. May be.

[Absorption layer]
The absorbent layer 60 in the absorbent article 10 of the present invention has a first absorbent body 40 and a second absorbent body 50 in order from the side of the top sheet 20 as shown in FIGS. 2 and 3. Further, the first absorbent body 40 is located from the front area A to the rear area C in a plan view, and is fixedly carried on the fiber of the first tow and the fiber of the first tow. The second absorbent body 50 is located in the central region B in a plan view, and has a first superabsorbent polymer and a fiber assembly composed of a second tow and a fiber assembly composed of a second tow. A second superabsorbent polymer fixedly supported on the fibers of.
By configuring the absorbent layer 60 as described above, urine is absorbed in the central area B which is the urinary area of the first absorbent body 40, and is further diffused by the liquid diffusive sheet 70 and the second absorbent body 50 in the lower layer. In addition, since it is absorbed, it has high absorption capacity and diffusion capacity, and can prevent urine from returning. In addition, since there is no reversion, the wear feeling is excellent even after urination.
Hereinafter, the details of the first absorber 40 and the second absorber 50 will be described.

(First absorber)
The first absorbent body 40 is located from the front region to the rear region in a plan view, and is fixedly supported on the fibers of the fiber assembly composed of the first tow and the fiber assembly composed of the first tow. With a superabsorbent polymer.
The first absorbent body 40 is inferior to the conventional absorbent material containing fluff pulp in terms of diffusivity and absorption rate of urine, but since it contains a fiber aggregate made of tow, the first absorbent body 40 has flexibility and flexibility. Excel. Further, by providing in the central area B, it is possible to prevent backflow and leakage while realizing thinness and weight reduction.
The thickness of the first absorbent body 40 is preferably 1.5 mm or more and 3.0 mm or less so that the absorption speed is improved, the wearing feeling is not impaired, and a thin shape can be realized.
The dimension of the first absorbent body 40 in the longitudinal direction is preferably 95 mm or more and 550 mm or less, and the dimension in the width direction is preferably 25 mm or more and 180 mm or less. The dimension of the first absorbent body 40 in the longitudinal direction is more preferably 95 mm or more and 395 mm or less, and the dimension of the width direction is more preferably 25 mm or more and 105 mm or less.
The density without load of the first absorber 40 is preferably 2 kg/m ³ or more and 20 kg/m ³ or less, and more preferably 5 kg/m ³ or more and 15 kg/m ³ or less.

-Fiber aggregate composed of tow-
The fiber aggregate made of tow is an aggregate of long-fiber filaments obtained by disintegrating the tow, and is converged so that the orientation directions of the long fibers are aligned. In the present invention, it is preferable to arrange the long fibers such that the orientation direction thereof is the longitudinal direction Y of the absorbent article 10. For example, a tow of continuous filaments is opened and cut into an appropriate length to manufacture a fiber assembly composed of a bundle of long fibers.

As the base material of the fiber aggregate made of tow, natural cellulose derived from cotton or the like, regenerated cellulose such as rayon, cellulose acetate, polyethylene, polypropylene, PET or the like can be used, and among these, derived from cotton or the like. Natural cellulose, regenerated cellulose such as rayon, or cellulose acetate is preferably used, and it is more preferable to use cellulose acetate that can easily obtain bulkiness and can impart flexibility and flexibility to the first absorbent body 40.
Further, the fineness of the fiber aggregate made of tow is not particularly limited, but from the viewpoint that the first absorbent body 40 exhibits desired performance and has sufficient strength in use, for example, 0.1 dtex or more 10 It may be 0.0 dtex or less.

Further, in the fiber assembly made of tow, since the entanglement between the fibers is weak, it is preferable to use a binder for the purpose of fusing and fixing the entanglement. Triacetin or the like can be used as the binder.

The basis weight of the tow fiber aggregate is 20 g/m ² or more and 100 g/m ² or less. When the basis weight of the fiber assembly made of tow is in the above range, the first superabsorbent polymer can be supported to the extent that the absorbability can be secured, and the first absorbent body 40 having excellent flexibility and flexibility can be obtained. Obtainable. When the basis weight of the fiber assembly made of tow exceeds 100 g/m ² , the degree of compression at the time of reducing the thickness of the first absorbent body 40 becomes large, and the original flexibility and flexibility of the fiber assembly made of tow are obtained. Flexibility is impaired, which is not preferable.
The basis weight of the fiber aggregate made of tow is more preferably 30 g/m ² or more and 80 g/m ² or less.

-First superabsorbent polymer-
The material of the first superabsorbent polymer in the first absorbent body 40 may be any material that can absorb urine and prevent reflux, such as sodium polyacrylate-based, polyaspartate-based, (starch- Acrylic acid) graft copolymer, (acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer, and those formed from materials such as saponified products thereof can be used. Among these, from the viewpoint of the amount absorbed per weight, sodium polyacrylate type is preferable.

The basis weight of the first superabsorbent polymer is 60 g/m ² or more and 500 g/m ² or less, and the basis weight of the first superabsorbent polymer is the basis weight of the fiber assembly including the first tow. The amount is preferably 0.6 times or more and 5.0 times or less. As a result, it is possible to secure the necessary amount of absorption, and the fiber assembly composed of the first tow can satisfactorily carry the first superabsorbent polymer, and the feeling of wearing due to a rough and uncomfortable feeling when worn. It is possible to avoid the decrease of. When the basis weight of the first superabsorbent polymer is more than 5.0 times the basis weight of the fiber assembly made of the first tow, the fiber assembly made of tow makes the first superabsorbent polymer good. Can no longer be carried on the.
The basis weight of the first superabsorbent polymer is 100 g/m ² or more and 300 g/m ² or less, and 1.0 times or more and 3.0 times the basis weight of the fiber assembly including the first tow. It is more preferable that the amount is not more than double.

In the present invention, the supporting rate of the first superabsorbent polymer on the fiber aggregate composed of the first tow is preferably 70% or more. As a result, it is possible to avoid a reduction in the feeling of wearing due to the occurrence of a rough and unnatural feeling during wearing.
Here, a method for measuring the loading rate of the first superabsorbent polymer on the fiber assembly made of the first tow will be described with reference to FIG.

(1) First, a sheet 110 (370 mm in length, 110 mm in width) in which a first superabsorbent polymer is supported on a fiber assembly made of tow before the first absorbent body 40 is manufactured and the first sheet that falls off after the test Prepare a container for collecting the superabsorbent polymer.
(2) Hold both lateral ends (reference numeral (a) in FIG. 4) of one longitudinal end so that the other longitudinal end of the sheet faces downward. At this time, the other longitudinal end of the sheet is adjusted so as to be located at a position approximately 30 cm from the bottom surface of the container.
(3) After that, a shaking operation of displacing it downward (in the direction of the arrow of (b) in FIG. 4) by about 5 cm and returning it to the original position is continuously performed 20 times reciprocatingly.
(4) The weight of the first superabsorbent polymer dropped into the container was measured, {(weight of the first superabsorbent polymer carried on the sheet before sieving-first dropped superabsorbent polymer The weight of the first superabsorbent polymer supported on the above-mentioned sheet before sieving}×100 to the fiber aggregate consisting of the tow of the first superabsorbent polymer. And the carrying rate (%).

(Second absorber)
As shown in FIG. 2, the second absorbent body 50 is located in the central region B in a plan view, and is fixedly carried on the fibers of the fiber assembly composed of the second tow and the fiber assembly composed of the second tow. And a second superabsorbent polymer.
The non-load density of the second absorber 50 is higher than the non-load density of the first absorber 40. As a result, body fluid such as urine is absorbed near the central region B of the first absorbent body 40, and then diffused and absorbed by the lower layer liquid diffusing sheet 70 and the high-density second absorbent body 50. Therefore, the liquid return is suppressed and the wearing feeling after urination is excellent.
The density of the second absorbent body under no load is preferably 20 kg/m ³ or more and 200 kg/m ³ or less, and more preferably 30 kg/m ³ or more and 150 kg/m ³ or less.
The densities of the first absorbent body 40 and the second absorbent body 50 can be adjusted by the defibration degree of the tow and the press conditions.

Moreover, since the second absorber 50 is provided in the central region B in a plan view, it is possible to absorb urine intensively and efficiently in the urination region.
The dimension of the second absorbent body 50 in the longitudinal direction is preferably 60 mm or more and 350 mm or less, and the dimension in the width direction is preferably 25 mm or more and 180 mm or less.
The thickness of the second absorbent body 50 is preferably 1.5 mm or more and 3.0 mm or less so as to improve the absorption speed and not impair the wearing feeling.

-A fiber assembly composed of a second tow-
As the fiber assembly composed of the second tow, the same fiber assembly composed of the first tow can be used.

-Second superabsorbent polymer-
As the second superabsorbent polymer, the same as the above-mentioned first superabsorbent polymer can be used.
The basis weight of the second superabsorbent polymer is preferably 60 g/m ² or more and 500 g/m ² or less in order to secure the absorption performance required for various absorbent articles. Further, from the viewpoint of further improving the absorption performance, the touch after absorption, and the ease of movement of the wearer, the basis weight of the second superabsorbent polymer is more preferably 150 g/m ² or more and 400 g/m ² or less. preferable.

In addition, by avoiding fine powder having poor fluidity as a powder, the basic performance relating to absorption is improved, and the rugged tactile sensation caused by the hardness of the second absorber 50 is reduced. The median particle diameter of the superabsorbent polymer is preferably 50 μm or more and 600 μm or less, and more preferably 100 μm or more and 500 μm or less.

The supporting rate of the second superabsorbent polymer on the fiber assembly composed of the second tow is preferably 70% or more. Incidentally, the method for measuring the loading rate of the second superabsorbent polymer on the fiber assembly composed of the second tow is such that the first superabsorbent polymer is loaded on the fiber assembly composed of the first tow. It is the same as the method for measuring the rate.

As described above, the absorbent article 10 of the present invention has the first absorbent body 40 having excellent flexibility and flexibility, and the second absorbent body 50 having sufficient absorbability and diffusibility even without the fluff pulp. By having and, even if it is thin, it has a high absorbing ability and a high diffusing ability, and a good wearing feeling can be obtained.

[Liquid diffusion sheet]
In the absorbent article 10 of the present invention, as shown in FIG. 2, in order to promote the diffusion of the body fluid to the upper surface of the second absorbent body 50, the first absorbent body 40 and the second absorbent body 50 are provided with a first A liquid diffusive sheet 70 having the same size as the one absorber 40 is provided. As the liquid diffusion sheet 70, for example, hydrophilic non-woven fabric such as air-through non-woven fabric, point-bonded non-woven fabric, spun-bonded non-woven fabric, melt-blown non-woven fabric, spun-bonded non-woven fabric/melt-blown non-woven fabric, spun-bonded non-woven fabric/melt-blown non-woven fabric are laminated. Mention may be made of composite non-woven fabrics.
The thickness of the liquid diffusing sheet 70 is preferably 0.1 mm or more and 2 mm or less, and the basis weight thereof is preferably 15 g/m ² or more and 100 g/m ² or less.

[Carrier sheet]
The absorbent article 10 of the present invention may have a carrier sheet 80. The carrier sheet 80 may cover the first absorbent body 40, the liquid diffusible sheet 70, and the second absorbent body 50 so as to integrally wrap the whole, or from the body side of the first absorbent body 40. The second absorbent body 50 may be covered so as to be sandwiched integrally with the clothing side.
By providing the carrier sheet 80 in this manner, the shapes of the first absorbent body 40 and the second absorbent body 50 can be maintained. Further, it is possible to prevent the first superabsorbent polymer and the second superabsorbent polymer from leaking out of each absorbent body (40, 50).
Examples of the carrier sheet 80 include tissues, absorbent paper, hydrophilic nonwoven fabrics such as spunbonded nonwoven fabrics and air-laid nonwoven fabrics, and it is preferable to use tissues from the viewpoint of liquid diffusibility, water retention and cost. The basis weight is preferably 10 g/m ² or more and 40 g/m ² or less, and more preferably 15 g/m ² or more and 20 g/m ² or less from the viewpoint of strength and wearing comfort.

[Three-dimensional gather]
The body-side surface of the absorbent article 10 is preferably provided with a three-dimensional gather 100. This three-dimensional gather 100 forms a confining space for bodily fluid together with the top sheet 20 so that leakage of bodily fluid can be prevented. The three-dimensional gather 100 preferably includes a three-dimensional gather sheet and a stretchable elastic member arranged along the free end of the three-dimensional gather sheet. As the stretchable elastic member, a thread-shaped, string-shaped, or flat-shaped member made of natural rubber, synthetic rubber, polyurethane, or the like can be appropriately used.

<Method of manufacturing absorbent article>
The method for manufacturing the absorbent article 10 is not particularly limited and can be a conventionally known method. For example, from the clothing side, the back sheet 30, the second absorber 50, the liquid diffusion sheet 70, the first Laminating the absorber 40 and the top sheet 20 in this order, and fixing the top sheet 20 and the back sheet 30 over a part or the whole circumference using a hot melt adhesive, heat embossing, ultrasonic embossing, high frequency embossing, or the like. Can be manufactured in. Then, after individually packaging this in a packaging sheet, it may be folded in three in the longitudinal direction.

Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope of the above-described embodiments, and various modifications or improvements are made to the above-described embodiments. It will be apparent to those skilled in the art that It is also apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

10 Absorbent Articles 20 Top Sheet 30 Back Sheet 40 First Absorber 50 Second Absorber 60 Absorbing Layer 70 Liquid Diffusive Sheet 80 Carrier Sheet 100 Three-Dimensional Gather 110 Sheet A Carrying the First Highly Absorbent Polymer A Front Area B central area C rear area

Claims (9)

A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent article having an absorbent layer between the top sheet and the back sheet,
The absorbent article comprises a front region, a central region, and a rear region along the longitudinal direction,
The absorbent layer has a first absorbent body and a second absorbent body from the top sheet side,
The first absorbent body is located from the front region to the rear region in a plan view, and is fixedly carried on the fiber aggregate of the first tow and the fibers of the fiber aggregate of the first tow. Having a first superabsorbent polymer,
The second absorbent body is located in the central region in a plan view, and has a second high-absorption property that is firmly fixed and carried by the fiber assembly of the second tow and the fibers of the fiber assembly of the second tow. Having a hydrophilic polymer,
The unloaded density of the second absorber is higher than the unloaded density of the first absorber,
An absorbent article in which a liquid diffusing sheet having substantially the same size as the first absorbent body is provided between the first absorbent body and the second absorbent body. The basis weight of the fiber assembly composed of the first tow is 20 g/m ² or more and 100 g/m ² or less,
The first superabsorbent polymer has a basis weight of 60 g/m ² or more and 500 g/m ² or less, and is 0.6 times or more 5 times the basis weight of the fiber assembly including the first tow. The absorbent article according to claim 1, which is not more than 0.0 times. The absorbent article according to claim 1 or 2, wherein a loading rate of the first superabsorbent polymer on the fiber assembly made of the first tow is 70% or more. The absorbent article according to any one of claims 1 to 3, wherein the constituent fibers of the fiber assembly made of the first tow are made of cellulose acetate. The absorbent article according to any one of claims 1 to 4, wherein a density of the first absorbent body under no load is 2 kg/m ³ or more and 20 kg/m ³ or less. The basis weight of the fiber assembly composed of the second tow is 20 g/m ² or more and 100 g/m ² or less,
The second superabsorbent polymer has a basis weight of 60 g/m ² or more and 500 g/m ² or less, and is 0.6 times or more 5 times the basis weight of the fiber assembly including the second tow. The absorbent article according to any one of claims 1 to 5, which has a ratio of 0.0 times or less. The absorbent article according to any one of claims 1 to 6, wherein a loading rate of the second superabsorbent polymer on the fiber assembly composed of the second tow is 70% or more. The absorbent article according to any one of claims 1 to 7, wherein the constituent fibers of the fiber assembly made of the second tow are made of cellulose acetate. The absorbent article according to any one of claims 1 to 8, wherein a density without load of the second absorber is 20 kg/m ³ or more and 200 kg/m ³ or less.