JP2020081531A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which improves diffusivity and liquid permeability and also improves liquid return preventing performance.SOLUTION: An absorbent article includes a liquid permeable top sheet, a liquid impermeable back sheet, and an absorber arranged between the top sheet and the back sheet, and has an aperture film 70 having a plurality of apertures of a truncated cone shape between the top sheet and the absorber. The aperture film is constituted of a central part B and both end parts A, C in a longitudinal direction Y. On a surface on a top sheet side of the aperture film 70, an aperture diameter Dof the aperture 74 in the central part B is smaller than aperture diameters D, Dof the apertures 73, 75 in both end parts A, C. In the aperture 74 in the central part B, the aperture diameter Don a surface on the top sheet side is smaller than an aperture diameter Don a surface on a back sheet side. In the apertures 73, 75 on both end parts A, C, the aperture diameters D, Don the surface on the top sheet side are larger than aperture diameters D, Don the surface of the back sheet side.SELECTED DRAWING: Figure 4

Description

The present invention relates to an absorbent article having an apertured film.

Generally, absorbent articles such as light incontinence pads, pants-type paper diapers, and taped paper diapers include a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between both sheets. ,,. As a result, body fluid such as urine is absorbed by the absorber through the top sheet and is prevented from leaking to the outside by the back sheet. Various measures have been made to such absorbent articles in order to improve the absorbability of body fluids, improve the wearing feeling of the wearer, prevent leakage, and the like.

For example, there is a technique for improving the absorption performance such as wet back and absorption speed by providing an apertured film at a predetermined position of the absorbent article. By making the opening area of the skin side surface of the apertured film larger than that of the non-skin side surface, wet back and absorption rate are improved.

As an absorbent article using an apertured film, for example, Patent Document 1 discloses an absorbent article having a liquid-permeable surface material, a liquid-retaining absorbent material, and a liquid-impermeable leak-proof material, The surface material is composed of a liquid-permeable sheet in which a skin-contacting surface layer and a non-skin-contacting surface layer are laminated and integrated, and the skin-contacting surface layer is composed of a perforated film or synthetic fiber composed of a thermoplastic resin. An absorbent article formed of a non-woven fabric is disclosed.

Further, Patent Document 2 includes a surface layer provided in order from top to bottom, an absorption layer, and a bottom layer, and the absorption layer includes, from top to bottom, a perforated film layer, a core layer, and a bottom adhesion layer. And a perforated film layer is located between the surface layer and the core layer, and a lower adhesion layer is located between the core layer and the bottom layer.

Further, Patent Document 3 discloses an absorbent body having an absorbent body layer containing at least one of SAP and fluff pulp as an absorbent body component, wherein the absorbent body is arranged in contact with the absorbent body layer and is water resistant. And an absorbent coating layer made of a highly breathable synthetic resin open-pore film, the absorbent coating layer is configured to prevent the release of the absorbent component from the absorbent and to maintain the morphological stability. The perforated film has a large number of funnel-shaped projections with a small top opening and a large bottom opening, and the tops of the projections were arranged so as to contact the absorber layer. An absorber is disclosed.

JP-A-8-66425 Utility model registration No. 3215515 JP, 2002-355271, A

However, in the absorbent article and the urine absorbing pad of Patent Document 1 and Patent Document 2 provided with the above-mentioned apertured film, both of which are excellent in liquid return prevention property such as wet back and absorption rate, but liquid in the absorbent article It cannot be said that it has an effect on the diffusivity, and the absorbent performance of the absorbent body cannot be sufficiently exhibited.

Further, the absorbent body described in Patent Document 3 uses a perforated film having a smaller opening area on the skin side surface than the conventional non-skin side surface, and the surface having a small opening area is in contact with the absorbent body. However, even in this case, there is no technical idea of improving the diffusibility of the liquid.

As in the above-mentioned patent documents, as the liquid receiving side surface material of sanitary napkins and disposable diapers, there are those in which an apertured film is used, and liquid permeability and liquid return prevention by arranging the apertured film. Is improved. However, although apertured films are often more expensive than ordinary non-woven fabrics, they are insufficient to show more beneficial liquid permeability and liquid return prevention properties. Further, since the perforated film is a resin film, hardness is felt on the touch surface.

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 having improved diffusivity and liquid permeability and improved liquid return prevention property.

The present inventor, as a result of diligent studies, found that the above-mentioned problems can be solved by providing an apertured film having a specific structure between the top sheet and the absorber, and the present invention has been achieved. That is, the present invention is a liquid A permeable topsheet, a liquid-impermeable backsheet, and an absorbent article having an absorber arranged between the topsheet and the backsheet, wherein the topsheet and the absorber In between, provided with an aperture film having a plurality of frustoconical apertures, the aperture film is composed of a central portion and both ends along the longitudinal direction, on the surface of the aperture film on the top sheet side. , The opening diameter of the opening of the central portion is smaller than the opening diameter of the opening of the both end portions, the opening diameter of the central portion, the opening diameter on the surface of the topsheet side, the backsheet side The opening diameter is smaller than the opening diameter on the surface, and the opening diameters on both ends are larger than the opening diameter on the backsheet side surface.

The frustoconical openings have an opening diameter of 2 mm or less, a number of openings of 50/cm ² or more, and a basis weight of 20 g/m ² or more and 60 g/m ² or less. preferable.

In each of the central portion and the both end portions, the absolute value of the difference between the opening diameter on the surface of the top sheet side and the opening diameter on the surface of the back sheet side is 0.03 mm or more and 0.15 mm or less. preferable.

A liquid diffusing second sheet is preferably provided between the top sheet and the apertured film.

The basis weight of the second sheet is preferably 10 g/m ² or more and 60 g/m ² or less.

According to the present invention, it is possible to provide an absorbent article having improved diffusibility and liquid permeability and improved liquid return prevention property.

It is a top view of an absorbent article of the present invention. It is sectional drawing of X1-X1 in FIG. It is a top view of the aperture film in this invention. FIG. 4 is a sectional view taken along line X2-X2 in FIG. 3.

Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be described in detail with reference to the accompanying drawings, but these are given for the purpose of illustration, and the present invention is not limited by these. Absent. The same elements are denoted by the same reference symbols throughout the description of the embodiments.

In addition, in the description of the present specification, “when the absorbent article 10 is worn” means at least one of when the absorbent article 10 is worn and after it is worn. The longitudinal direction of the absorbent article 10 is a direction extending in front of and behind the wearer when the absorbent article 10 is worn, and is a direction indicated by a symbol Y in the drawing. Moreover, the width direction of the absorbent article 10 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, the skin contacting surface is a surface of the front and back surfaces of each member such as an absorber that is arranged on the skin side of the wearer when worn, and the non-skin contacting surface is each member such as the absorber. Of the front and back surfaces, the surface facing away from the wearer's skin side when worn. The body fluid is a fluid such as urine, blood, or water in loose stool discharged from the body to the outside of the body. Furthermore, examples of the absorbent article 10 include light incontinence pads, pants-type paper diapers, and taped paper diapers for babies or adults, but are not limited thereto, and other absorbent articles may be used. It may be.

[Absorptive article]
FIG. 1 is a plan view of an absorbent article 10 according to an embodiment of the present invention viewed from the topsheet 20 side. As shown in FIG. 1, an absorbent article 10 according to the present embodiment has a liquid-permeable top sheet 20 arranged on the skin contact surface side and a non-skin contact surface side facing the top sheet 20. The liquid impermeable back sheet 30 and the absorber 40 arranged between the top sheet 20 and the back sheet 30. Further, as shown in FIG. 2, the absorbent article 10 includes a second sheet 50, which is a liquid diffusion sheet, and an aperture film 70 having a plurality of apertures, between the top sheet 20 and the absorber 40.

Longitudinal direction Y dimension _{L 10} of the absorbent article 10 is 100mm or more 800mm or less, it is preferable that the dimension _{W 10} in the width direction X is at least 50mm 500mm or less. By adjusting the dimensions of the absorbent article 10 within the above range, it is possible to obtain the absorbent article 10 suitable for a light incontinence pad, a pants-type paper diaper, a taped paper diaper, and the like.

(Top sheet)
The top sheet 20 may be formed of a liquid-permeable base material that allows body fluid to move to the absorber 40. As the substrate having liquid permeability, for example, non-woven fabric such as air-through non-woven fabric, thermal bond non-woven fabric, spun bond non-woven fabric, composite non-woven fabric in which thermal bond/spun bond is laminated, foamed film such as urethane foam, or these are laminated. Examples include composite sheets.
Further, the top sheet 20 may be embossed or perforated on its surface in order to improve liquid permeability. As a method for performing these embossing and perforating processes, known methods can be used without limitation. Moreover, in order to reduce the irritation to the skin, the top sheet 20 may contain a lotion, an antioxidant, an anti-inflammatory component, a pH adjusting agent, an antibacterial agent, a moisturizing agent and the like.
From the viewpoint of strength, workability, and amount of liquid returned, the basis weight of the top sheet 20 is preferably 18 g/m ² or more and 40 g/m ² or less. The top sheet 20 guides the bodily fluid to the absorbent body 40 so as not to leak, and thus may have a shape that covers the absorbent body 40.

(Back sheet)
The backsheet 30 may be a substrate having a liquid impermeable property such that the body fluid held by the absorbent body 40 does not wet clothes, such as a resin film or a composite sheet in which a resin film and a nonwoven fabric are laminated. Formed from material. The nonwoven fabric used for the composite sheet is not particularly limited in its production method, and examples thereof include spunbond nonwoven fabric and meltblown nonwoven fabric, or spunbond/meltblown, spunbond/meltblown/spunbond laminated non-woven fabric, and composite materials thereof. Can be mentioned. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, a composite film of polyethylene and polypropylene, and the like.

From the viewpoint of strength and workability, the basis weight of the back sheet 30 is preferably 15 g/m ² or more and 60 g/m ² or less. Further, in order to prevent stuffiness during mounting, it is preferable that the back sheet 30 has air permeability. In order to provide the backsheet 30 with air permeability, for example, a resin film as a base material may be mixed with a filler, or the backsheet 30 may be embossed. As the filler, calcium carbonate can be mentioned, and the compounding method thereof can be carried out by a known method without limitation.

(Aperture film)
In the present invention, an aperture film 70 having a plurality of truncated cone-shaped apertures is provided between the top sheet 20 and the absorber 40.
The apertured film 70 preferably has liquid permeability and liquid diffusivity so that body fluid moves to the absorber 40.
From the viewpoint of liquid diffusibility, the aperture film 70 preferably has an aperture diameter of 2 mm or less, more preferably 0.50 mm or more and 0.65 mm or less.
Here, the "opening diameter" is an average value obtained by photographing the opening film 70 with a 3D microscope (VR-3100) manufactured by Keyence Corporation and measuring the diameters of three arbitrarily selected openings.
Further, "the aperture diameter is 2 mm or less" means that the aperture diameters of the top sheet 20 side surface 71 and the back sheet 30 side surface 72 of the aperture film 70 are both 2 mm or less.
From the viewpoint of liquid permeability, the number of openings is preferably 50/cm ² or more and 200/cm ² or less. Further, from the viewpoint of strength and processability, the basis weight of the apertured film 70 is preferably 20 g/m ² or more and 60 g/m ² or less, and more preferably 23 g/m ² or more and 30 g/m ² or less. preferable.
By setting the aperture diameter, the number of apertures, and the basis weight of the apertured film 70 within the above ranges, the apertured film 70 having excellent strength, processability, liquid permeability, and liquid diffusibility can be obtained.

The material of the perforated film 70 is preferably polyethylene or polypropylene, and among them, polyethylene is preferable from the viewpoint of softness.

As shown in FIG. 3, the apertured film 70 includes a central portion B and both end portions A and C along the longitudinal direction Y. The central portion shows an area of 10% or more and 90% or less including the center in the width direction X, and both end portions show the left side area and the right side area of the central area in the width direction X on the paper surface. The center hole diameter is an average value obtained by measuring the diameters of any three holes in the range near the center part, and the hole diameters at both ends are the three hole diameters in the range near both ends. Is the average value of the measured diameters of.
On the surface 71 of the apertured film 70 on the top sheet 20 side, the aperture diameter D _b1 of the aperture 74 at the central portion B is smaller than the aperture diameters D _a1 and D _c1 of the apertures 73 and 75 at both ends A and C, respectively. In addition, it is preferable that the aperture diameters D _a1 and D _c1 of the apertures 73 and 75 of the both ends A and C are substantially the same.
Further, regarding the opening 74 in the central portion B, the opening diameter D _b1 on the surface 71 on the top sheet 20 side is smaller than the opening diameter D _b2 on the surface 72 on the back sheet 30 side, and the opening 73 on both end portions A and C and In No. 75, the opening diameters D _a1 and D _c1 on the surface 71 on the top sheet 20 side are larger than the opening diameters D _a2 and D _c2 on the surface 72 on the back sheet 30 side.
On the surface of the apertured film 70 on the top sheet 20 side, the aperture diameter D _b1 of the aperture 74 at the central portion B is smaller than the aperture diameters D _a1 and D _c1 of the apertures 73 and 75 at both ends A and C. Since it has a good feel to the skin and has an excellent rate of diffusion and absorption of body fluid such as urine in the lateral direction, side leakage is unlikely to occur. Further, since the opening diameters D _a2 and D _c2 on the surface 72 on the back sheet 30 side of the both ends A and C are smaller than the opening diameters D _a1 and D _c1 on the surface 71 on the top sheet 20 side, it is difficult to return the liquid.

As shown in FIG. 4, in the central portion B of the apertured film 70, the absolute value of the difference between the aperture diameter D _b1 on the surface 71 on the topsheet 20 side and the aperture diameter D _b2 on the surface 72 on the backsheet 30 side is: It is preferably 0.03 mm or more and 0.15 mm or less.
Similarly, in both end portions A and C, the absolute value of the difference between the opening diameters D _a1 and D _c1 on the surface 71 on the top sheet 20 side and the opening diameters D _a2 and D _c2 on the surface 72 on the back sheet 30 side is the same. , 0.03 mm or more and 0.15 mm or less.
By setting the difference between the opening diameter of the surface 71 on the topsheet 20 side and the opening diameter of the surface 72 on the backsheet 30 side to be in the above range, the surface feels good and body fluids such as urine quickly spread laterally and are absorbed. As a result, side leakage can be prevented and liquid return can be prevented.
The perforated film 70 in the present invention can be produced by embossing a material such as a film having no pores so as to perforate the pores.

(Absorber)
In the absorbent article 10 of the present invention, as shown in FIG. 1, the dimension L ₄₀ of the longest width of the absorbent body 40 in the longitudinal direction Y is preferably 100 mm or more and 800 mm or less, and 150 mm or more and 500 mm or less. More preferable. Further, the maximum width W ₄₀ of the absorbent body 40 in the width direction is preferably 50 mm or more and 500 mm or less, and more preferably 70 mm or more and 105 mm or less. In addition, as shown in FIG. 2, the absorbent body 40 in the absorbent article of the present embodiment includes an upper layer absorbent body 41 located on the skin contact surface side and a lower layer absorbent body 42 located on the non-skin contact surface side. However, the carrier sheet 60 may be disposed between the upper layer absorbent body 41 and the lower layer absorbent body 42 to form a three layer structure.

-Absorptive fiber-
The absorber 40 contains an absorbent fiber as a base material and a super absorbent polymer (SAP).
The absorbent fiber may be one that is generally used for absorbent articles such as sanitary napkins, paper diapers, and urine absorbing pads. For example, fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, hydrophilic non-woven fabric, etc. Can be mentioned. Among these, fluff pulp is preferably used from the viewpoint of absorbability. Examples of the fluff pulp include wood pulp (for example, bleached softwood kraft pulp (N-BKP) such as Southern pine and Douglas fir), synthetic fibers, resin fibers, non-wood pulp, and the like that have been defibrated into a cotton shape. it can. The absorber 40, the case of using fluff pulp in the absorbent fibers of the base material, the basis weight of the absorbent fibers, preferably at 100 g / ^{m 2} or more 800 g / ^{m 2} or less, 325 g / ^{m 2} or more 615g /M ² or less is more preferable. This makes it possible to absorb more body fluid without impairing the feel of the skin.

-Super absorbent polymer-
The superabsorbent polymer of the absorbent body 40 may be any one capable of absorbing body fluid and preventing backflow, such as sodium polyacrylate-based, polyaspartate-based, (starch-acrylic acid) graft copolymers. , (Acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer, and saponified products thereof can be used. Among these, from the viewpoint of the amount of absorption per weight, sodium polyacrylate type is preferable.

The basis weight of SAP contained in the absorber 40 is preferably 240 g/m ² or more and 450 g/m ² or less, and more preferably 245 g/m ² or more and 445 g/m ² or less. Within the above numerical range, gel blocking in the absorber 40 can be prevented and a large amount of body fluid can be absorbed in the absorber 40.
In the absorbent body 40, the ratio of the weight of the superabsorbent polymer to the weight of the fluff pulp, the weight of the superabsorbent polymer/the weight of the fluff pulp×100(%) is 40% or more and 120% or less. It is preferably 50% or more and 100% or less.

In the absorbent body 40, the form of the absorbent fiber and the SAP may be formed by mixing the SAP particles in the absorbent fiber, or may be the SAP sheet in which the SAP particles are fixed between the absorbent fibers. The absorber 40 may be wrapped in a carrier sheet 60 for the purpose of preventing leakage of SAP particles and stabilizing the shape of the absorber 40. Any material having hydrophilicity may be used as the base material of the carrier sheet 60, and examples thereof include hydrophilic non-woven fabric such as tissue, absorbent paper, and air-laid non-woven fabric. When a plurality of carrier sheets 60 are provided, the base materials of the plurality of carrier sheets 60 may be the same or different.

(Liquid diffusion second sheet)
As shown in FIG. 2, between the top sheet 20 and the apertured film 70, the liquid diffusion property of the absorbent article 10 is improved, and the hardness of the apertured film 70 is suppressed to improve the touch. Therefore, it is preferable to dispose the second sheet 50 having a liquid diffusion property. The base material of the second sheet 50 may be any material as long as it has a faster body fluid permeation rate than the top sheet 20 and diffuses body fluid into the absorber 40 quickly. For example, a hydrophilic nonwoven fabric, particularly an air-through nonwoven fabric is preferable. The thickness of the second sheet 50 is preferably 0.1 mm or more, and the basis weight thereof is preferably 10 g/m ² or more and 60 g/m ² or less, and more preferably 15 g/m ² or more and 40 g/m ² or less. If the thickness is less than 0.1 mm, or the basis weight is less than 10 g/m ² or more than 60 g/m ² , the liquid is not sufficiently diffused over the entire upper surface of the absorbent body 40. The shape of the second sheet 50 is not particularly limited, but it is preferable that the surface of the absorbent body 40 can be completely covered so that body fluid diffuses throughout the absorbent body 40.

(Three-dimensional gather)
As shown in FIG. 2, the absorbent article 10 has an elastic member for three-dimensional gathers along the longitudinal direction of the absorbent article 10 in order to prevent lateral leakage of body fluids excreted by the user. A pair of three-dimensional gathers 80 may be included. The outer end of the three-dimensional gather 80 in the width direction of the absorbent article 10 is fixed to the backsheet, the inner end thereof is fixed to the topsheet 20, and the center thereof is a free end that is not fixed to the topsheet 20. Gather sheets are arranged. By providing the elastic member for three-dimensional gathers along the longitudinal direction, the three-dimensional gather 80 has an upright property and can be deformed according to the wearer's body shape. As the elastic member for the three-dimensional gather, for example, polyurethane thread, strip-shaped polyurethane film, thread-shaped or strip-shaped natural rubber, etc. are used, and as the three-dimensional gather sheet, water repellent or liquid impermeable formed of hydrophobic fiber. Non-woven fabrics such as spun bond non-woven fabrics, melt blown non-woven fabrics, and composite non-woven fabrics obtained by laminating spun bond/melt blown/spun bond are used.

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 described in the above embodiments and examples. It will be apparent to those skilled in the art that various modifications and improvements can be added to the above-described embodiment. 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.

Hereinafter, the present invention will be described in detail with reference to examples. The present invention is not limited to the examples shown below.

[Example 1]
(Preparation of absorbent article)
In the absorber, 7 g of fluff pulp as a base material was mixed with 6 g of SAP to be used, and an air-through non-woven fabric (basis weight 25 g/m ² ) was used as the top sheet. as backsheet, using breathable polyethylene sheet (basis weight 32 g / ^{m 2),} air-through nonwoven fabric as a second sheet (basis weight 30 g ^{/ m} 2), as standing gathers, the composite nonwoven fabric obtained by laminating a spunbonded / meltblown / spunbond ( A grammage of 15 g/m ² ) and upper and lower carrier sheets were used.
In addition, three sheets of open-pore film having a basis weight of 26 g/m ² cut into a size of 273 mm in the longitudinal direction and a size of 35 mm in the width direction were prepared, and the second sheet had a larger opening diameter on both sides in the width direction on the absorber. The central portion in the width direction was arranged so that the side with the smaller opening diameter was in contact with the second sheet so as to be in contact with the side. The dimensions of the absorbent article were 273 mm in the longitudinal direction and 105 mm in width, and the dimensions of the absorbent body were 220 mm in the longitudinal direction and 71 mm in width.

[Comparative Example 1]
An absorbent article was produced in the same manner as in Example except that the apertured film was not used.

[Comparative example 2]
An absorbent article was produced in the same manner as in the example except that an apertured film (basis weight: 26 g/m ² ) was placed under the second sheet, and the side having the larger aperture diameter was placed as the second sheet side.

[Evaluation]
The following evaluations were performed on the examples and comparative examples. The evaluation results are shown in Table 1.
(Soft feel of absorbent article surface)
Eight panelists evaluated the feel of the surface of the absorbent article. Touching the surface of the absorbent article, "○" when there are 6 or more and 8 or less evaluators who "feel the surface is soft", and when there are 3 or more and 5 or less evaluators who "feel the surface is soft" When there were one or two evaluators having a "triangle" or "feeling that the surface was soft", or when there were no evaluators having a "feeling that the surface was soft", there was "x".

(3 times absorption rate method)
A hole having an inner diameter of 19 mm is opened in the center of a cylinder having a bottom area of 16.8 cm ² , and a measuring jig having a weight of 755.6 g is placed on the central portion in the longitudinal direction and the width direction of the absorbent article, 20 ml of physiological saline was dropped from each of the holes in the upper part, and the time was measured from the time when the physiological saline came into contact with the absorbent article to the point where the liquid was completely sucked into the circumference in the center circle of the jig (1 Second time). Then, after the lapse of 3 minutes, the same time was measured (second time), and similarly, the third time was measured.

(Liquid return amount)
With the top sheet facing upward, 120 ml of physiological saline was poured toward the center of the absorbent body, and after leaving it for 10 minutes, a filter paper (manufactured by ADVANTEC) was weighed in advance on the physiological saline absorption site. No. 2 filter paper (diameter 55 mm) was placed, a weight of 35 kgf/cm ² was placed on it, and after 30 seconds, the weight of the filter paper was measured, and the weight difference of the filter paper was used as the liquid return amount.

(Wet spreadability)
With the top sheet facing upward, 120 ml of physiological saline is poured toward the center of the absorbent body, and the time until the physiological saline spreads 10 cm from the absorption site in the longitudinal direction of the product is measured. evaluated.

As shown in Table 1, it was found that in Examples, the surface had a good texture, the lateral diffusion and absorption rates were excellent, and the liquid did not easily return.
On the other hand, Comparative Example 1 containing no apertured film had a poor surface feel, was inferior in the lateral diffusion and absorption rate of the simulated urine (physiological saline), and had a large amount of liquid return. In addition, in Comparative Example 2 which includes an apertured film, but the larger the apertured diameter of the apertured film faces the skin side, the surface feels good and the liquid return amount is smaller than that of Comparative Example 1, but in the lateral direction. The diffusion and absorption rates were inferior, and the absorption rate was particularly slower than that of Comparative Example 1.
As described above, according to the present invention, when the liquid is received by urination or the like, it is quickly wet and spread, thereby improving the diffusibility and the liquid permeability, and improving the liquid return prevention property. Can be provided.

10 Absorbent Articles 20 Topsheet 30 Backsheet 40 Absorber 41 Upper Absorber 41 Upper Absorber 42 Lower Absorber 50 Second Sheet of Liquid Diffusive Sheet 60 Carrier Sheet 70 Opening Film 71 Surface of Topsheet (of Opening Film) 72 ( Surface of backsheet side of apertured film 80 Three-dimensional gather

Claims (5)

A liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent article having an absorber arranged between the topsheet and the backsheet,
Between the top sheet and the absorber, an aperture film having a plurality of frustoconical apertures is provided,
The apertured film is composed of a central portion and both end portions along the longitudinal direction,
On the surface of the topsheet side of the apertured film, the aperture diameter of the apertures in the central portion is smaller than the aperture diameter of the apertures of the both ends,
The opening of the central portion, the opening diameter on the surface of the topsheet side is smaller than the opening diameter on the surface of the backsheet side,
In the absorbent article, the openings at the both ends have an opening diameter on the surface on the topsheet side larger than an opening diameter on the surface on the backsheet side. The frusto-conical apertures have an aperture diameter of 2 mm or less, an aperture number of 50/cm ² or more, and a basis weight of 20 g/m ² or more and 60 g/m ² or less. The absorbent article according to 1. The absolute value of the difference between the aperture diameter on the surface of the topsheet side and the aperture diameter on the surface of the backsheet side is 0.03 mm or more and 0.15 mm or less in each of the central portion and the both end portions. The absorbent article according to 1 or 2. The absorbent article according to any one of claims 1 to 3, wherein a liquid diffusing second sheet is provided between the top sheet and the apertured film. The absorbent article according to any one of claims 1 to 4, wherein a basis weight of the second sheet is 10 g/m ² or more and 60 g/m ² or less.

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