JP2001341218A - Surface material of absorbable article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the surface material of an absorbable article comprising a perforated film excellent in the balance of the touch, flexibility, liquid permeability, liquid return preventing properties and concealability and capable of being manufactured by a widely used single drum having a perforated pattern. SOLUTION: The surface material of the absorbable article comprises a resin film covering the surface of the liquid absorbing material arranged in the absorbable article and having liquid permeable perforations and the resin film comprises a laminated film consisting of a resin layer, which forms a surface layer part having a sea-island structure in which a filler is dispersed and containing 30-80 wt.% of the filler at the part of the sea-island structure, and other resin layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a sanitary napkin,
The present invention relates to a surface material of an absorbent article such as a diaper.

[0002]

2. Description of the Related Art In general, absorbent articles such as sanitary napkins and diapers include an absorbent for absorbing body fluids such as blood and urine, and a surface material which covers the surface of the absorbent and directly contacts the skin. And a back surface material that covers the back surface of the absorber to prevent liquid leakage is configured as a main component. The surface material of the absorbent article is required to have liquid permeability in order to promptly transfer liquids such as blood and urine to the absorber and to absorb the liquid into the absorber. It has a liquid-return preventing property that does not return the liquid absorbed by the absorber to the skin side, a dry property that essentially leaves no liquid on the skin, and a concealing property that conceals the color of blood and the like diffused in the absorber. Is required.

[0003] Conventionally, as a surface material meeting the above demand, for example, a film formed by a casting method using a resin obtained by blending a low density polyethylene with a linear low density polyethylene is used. 2. Description of the Related Art There is known an apertured film which is placed on a perforated plate and formed with an aperture by blowing high-temperature air. For example, Japanese Patent Publication No. 57-17081 describes the surface material of this type of absorbent article, and Japanese Patent Application Laid-Open No. 55-146538 describes the production method thereof in detail.

[0004] By the way, the surface material using the above-mentioned conventional apertured film is superior in the liquid return preventing property and the concealing property as compared with the surface material using the non-woven fabric, but is not in contact with the skin. Because of its large area, it is inferior in feel to the skin compared to nonwoven fabrics. For this reason, an apertured film that is excellent in touch is desired. In order to meet this demand, for example, a height of 10 to 100 μm is provided on a rib portion of a drum having an opening pattern.
Forming irregularities of about m for embossing, or using a drum having a first small hole diameter pattern and a second large hole diameter hole pattern together, and forming holes with high-pressure hot water In addition, there has been proposed a method of manufacturing an apertured film having a molding structure having a small hole first opening and a visible large hole second opening (Japanese Patent No. 26009085, Japanese Patent No. 26009086). ).

[0005]

However, these methods require a lot of equipment cost, and have a problem in terms of economy as a method for industrially producing an apertured film. Therefore, rather than a perforated film conventionally used as a surface material,
Feel, flexibility, liquid permeability, liquid return prevention and excellent concealment of the aperture film, if it can be manufactured only by using a single drum having a general-purpose aperture pattern,
Its industrial value is extremely large.

Accordingly, an object of the present invention is to provide a soft, soft,
An object of the present invention is to provide a surface material for an absorbent article comprising an apertured film which has an excellent balance of liquid permeability, liquid return prevention and concealment properties and which can be manufactured by a general-purpose single drum having an apertured pattern.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have conducted intensive studies and as a result, have found that a filler having a specific concentration range is dispersed in the surface layer of a resin film to form a sea-island structure. The present inventors have found that a surface material comprising a perforated film is excellent in flexibility, liquid permeability, liquid return preventing property and concealing property, has a reduced contact area with the skin on the surface, and is excellent in feel, and has led to the present invention. Was.

That is, the present invention provides the following (1) to (7)
The surface material is provided. (1) A surface material made of a resin film that covers the surface of a liquid absorber disposed inside an absorbent article and has openings for liquid permeation, wherein the resin film is a sea island in which a filler is dispersed. A surface material of an absorbent article, which is a laminated film having a structure and a resin layer forming a surface layer portion in which a content ratio of a filler in the sea-island structure portion is 30 to 80% by weight, and another resin layer.

(2) The filler has an average particle diameter of 2 to 8 μm.
m, the surface material of the absorbent article according to (1). (3) The surface material of the absorbent article according to (1) or (2), wherein the filler is barium sulfate. (4) The surface material of the absorbent article according to (3), wherein a pH of the barium sulfate in a purity test of a cosmetic raw material standard evaluation is 6.5 to 7.5.

(5) The resin component of the resin layer forming the surface layer of the resin film is composed of 100 to 50 parts by weight of an ethylene / α-olefin copolymer and high-pressure low-density polyethylene
(1) consisting of an ethylene polymer containing up to 50 parts by weight
The surface material of the absorbent article according to any one of (4). (6) The resin component of the other resin layer of the resin film comprises an ethylene-based polymer mixture containing 100 to 10 parts by weight of an ethylene / α-olefin copolymer and 90 to 100 parts by weight of a high-pressure low-density polyethylene ( The surface material of the absorbent article according to any one of 1) to (5).

(7) The composition ratio (weight ratio) of the surface layer portion to the other resin layer portion is in the range of 1/4 to 1/1.
The surface material of the absorbent article according to any one of (1) to (6). (8) The surface material of the absorbent article according to any one of (1) to (7), having a basis weight of 5 to 50 g / m ² .

In the present invention, it is a preferred embodiment that the resin film is a laminated film comprising a resin layer forming a surface portion and containing a filler at a ratio of 30 to 80% by weight and another resin layer.

The filler has an average particle diameter of 2 to 8 μm.
Are preferred. Preferred are precipitated or ground barium sulfate.

As an embodiment of the resin constituting the film, the resin component forming the surface layer is an ethylene-based resin containing 100 to 50 parts by weight of an ethylene / α-olefin copolymer and 0 to 50 parts by weight of a high-pressure low-density polyethylene. What consists of union is preferable. The other resin forming the part other than the surface layer is preferably an ethylene-based polymer mixture containing 100 to 10 parts by weight of an ethylene / α-olefin copolymer and 90 to 100 parts by weight of a high-pressure low-density polyethylene.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the surface material of the absorbent article of the present invention (hereinafter referred to as “surface material of the present invention”) will be described in detail.

The surface material of the present invention is a surface material that covers the surface of the absorbent article and is made of a resin film having openings for liquid permeation. This apertured film, in the surface layer,
The resin and the filler constituting the film are phase-separated, and have a sea-island structure by a resin portion constituting a matrix corresponding to the sea and a portion composed of the filler distributed in an island or layer in the matrix. is there. This sea-island structure, for example, in the electron micrograph photographed from the surface layer side of the apertured film in FIG. 1, shows a state in which the filler scattered in islands on the film surface layer is distributed in other sea areas. Say. In FIG. 1, hexagonal depressions are openings of the film. FIG. 2 is a micrograph of the cross section of the apertured film, and the visible film surface is the side wall of the opening.

The concentration of the filler in the surface layer is preferably 30 to 80% by weight, preferably 40 to 60% by weight, more preferably 50 to 55% by weight in the resin. The filler has an average particle size of 2 to 8 μm.
m, preferably 4 to 6 μm. When the sea-island structure is constituted in such a range, a perforated film excellent in both touch and appearance can be obtained.

This apertured film has an aperture diameter of 0.1 to 2
mm, preferably 0.2 to 1.5 mm, more preferably 0.8 to 1.0 mm. The opening diameter can be determined by observing the opening ratio with a scanning electron microscope. The aperture ratio of this apertured film is 1
It is in the range of 0-50%, preferably 15-40%. The aperture ratio can be calculated by taking an optical microscope photograph of the surface material and performing image processing to calculate the area% of the opening.

The liquid permeability of the perforated film is determined by measuring the absorbability of a saline solution by placing the film on a commercially available napkin from which the surface material has been removed and dropping 5 ml of a blue-colored saline solution on the film. It can be evaluated by measuring the time taken. In order to obtain an apertured film having good liquid permeability (absorbed within 10 seconds), it is desirable that the aperture ratio is 10% or more, preferably 15% or more.

The load at 5% elongation in a tensile test of the apertured film is practically 10 to 200 g / 25.
mm, particularly preferably in the range of 30 to 150 g / 25 mm. In the present invention, the load at 5% elongation in the tensile test can be determined by performing a tensile test according to ASTM D638. Furthermore, the average coefficient of friction (MI
U) is preferably from 0.1 to 0.3, preferably from 0.1 to 0.25, more preferably from 0.1 to 0.2, in order to obtain a film having an excellent texture.
Further, the fluctuation (MMD) of the coefficient of friction is 0.001 to 0.0
3, preferably 0.001 to 0.025, more preferably 0.001 to 0.02.

Further, the thickness of the apertured film is not particularly limited, but is preferably 100 to 1000 μm, and more preferably 200 to 900 in consideration of liquid permeability and liquid return prevention.
μm, and more preferably 300 to 800 μm. The measurement of this thickness was carried out using a load of 8 g / cm.
² is a value measured by a thickness measuring machine. The surface material of the absorbent article comprising the apertured film has a basis weight of 5 to 50 g / m ² , preferably 10 to 30 g / m ² .

The film before opening has a thickness of usually 5 to 50 μm, preferably 10 to 50 μm, in terms of flexibility.
Those having a size of 40 μm are used. The composition ratio (weight ratio) of the surface layer portion and the other resin layer portion to the film thickness before opening is preferably in the range of 1/4 to 1/1.

Before opening the film, the filler should be 30-80.
Resin layer (1) containing at a weight percentage to form a surface layer
And another resin layer (2). In this case, it is preferable that the weight ratio between the resin layer (1) and the resin layer (2) is in the range of 1/4 to 1/1.

The perforated film constituting the surface material of the present invention contains a resin component composed of a thermoplastic resin, and a filler component that separates with the thermoplastic resin and forms a sea-island structure in the surface layer. As the thermoplastic resin, for example, a homopolymer of ethylene, a copolymer of ethylene and another α-olefin, a copolymer of ethylene and a carboxylic acid or a carboxylic acid ester-containing compound, ethylene and an aromatic organic compound and And / or ethylene-based polymers such as copolymers with aliphatic organic compounds, polyolefins such as polypropylene, polybutene-1, poly-4-methyl-1-pentene, polyamides, polyesters, polyacetals, polyphenylene ethers, polycarbonates, polyphenylene sulfates, etc. And engineering plastics. These can be used alone or in combination of two or more. Among these, ethylene polymers, polypropylene, polybutene-1, polyamide, polyester, and the like are preferable in terms of economy, and ethylene polymers are particularly preferable in terms of flexibility. Ethylene polymer,
Either a polymer based on a Ziegler catalyst or a polymer based on a metallocene catalyst may be used.

In the present invention, as the ethylene polymer, at least one selected from ethylene / α-olefin copolymer, high-pressure low-density polyethylene, and a copolymer of ethylene and a carboxylic acid or a carboxylic acid ester-containing compound is used. Is preferred because an apertured film having excellent flexibility can be obtained.

The ethylene / α-olefin copolymer is a random copolymer of ethylene and an α-olefin having 8 to 20 carbon atoms. As the α-olefin having 8 to 20 carbon atoms, propylene, 1-butene, 1-pentene, 1-
Hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-
Octadecene, 1-eicosene and the like can be mentioned. The ethylene / α-olefin copolymer contains one or a combination of two or more selected from ethylene and the α-olefin.

This ethylene / α-olefin copolymer has 55 to 99.9 mol% of a structural unit derived from ethylene and 0.1 to 45 mol of a structural unit derived from an α-olefin having 8 to 20 carbon atoms. %, More preferably 65 to 9 structural units derived from ethylene.
9.5 mol%, preferably containing 0.5 to 35 mol% of a structural unit derived from an α-olefin, particularly 70 to 99 mol% of a structural unit derived from ethylene, and a structural unit derived from an α-olefin Those containing the structural unit in a ratio of 1 to 30 mol% are preferred.

In the ethylene / α-olefin copolymer, the content ratio of the structural unit derived from ethylene to the structural unit derived from the α-olefin is usually 10%.
A sample prepared by uniformly dissolving about 200 mg of the copolymer in about 2.5 ml of a 4/1 mixed solution of hexachlorobutadiene / deuterated benzene in a sample tube of mmφ was measured at a measurement temperature of 120 ° C. Frequency 125.65 MHz, spectrum width 1500 Hz, pulse repetition time 5.5 sec
c, and under the measurement conditions of pulse width 7.5 μsec, ¹³
The C-NMR spectrum can be determined from the spectrum attributed to ethylene and the spectrum attributed to α-olefin. The identification of spectra belonging to ethylene and α-olefins is described, for example, in JAMES C.
RADALL, JMS-REV. MACROL. CHEM. PHYS., C29 (2 & 3), 20
1 (1989).

The ethylene / α-olefin copolymer has a density of 0.850 to 0.950 g / cm ³ , preferably 0.860 to 0.940 g / cm ³ , and more preferably 0.870 to 0.940 g / cm ³ . 0.930 g / cm ³ . The density was measured by using a density gradient tube after heat-treating a strand obtained at a melt flow rate (MFR) measurement at a load of 2.16 kg at 190 ° C. at 120 ° C. for 1 hour, and gradually cooling it to room temperature over 1 hour. It is a numerical value obtained by

Further, the melt flow rate (MFR) of this ethylene / α-olefin copolymer at 190 ° C. under a load of 2.16 kg is 0.5 to 100 g / 10
Min, preferably 1.0 to 50 g / 10 min, more preferably 2.0 to 40 g / 10 min.

The high-pressure low-density polyethylene is a highly branched polyethylene having a long chain branch produced by so-called high-pressure radical polymerization, and has a density of 0.915 to 0.915.
0.930 g / cm ³ , preferably 0.918 to 0.9
27 g / cm ³ , more preferably 0.920 to 0.92
5 g / cm ³ of polyethylene. This high-pressure low-density polyethylene has an MFR of 0.5 to 100 g / 10 minutes at 190 ° C. and a load of 2.16 kg, preferably 1.0 to 1.0 g / 10 min.
５０50 g / 10 min, more preferably 2.0-40 g / 1
It is desirable to be in the range of 0 minutes.

The high-pressure low-density polyethylene is
Swell ratio indicating the degree of long chain branching, that is, the inner diameter (Di) at 190 ° C. using a capillary flow property tester
2.0m, extrusion speed 10m from 15mm length nozzle
It is desirable that the ratio (Ds / Di) of the diameter (Ds) of the strand extruded at m / min to the inner diameter Di of the nozzle be 1.8 or more.

Further, the high-pressure low-density polyethylene is mixed with ethylene in an amount of not more than 50 mol%, preferably not more than 30 mol%, more preferably not more than 2 as long as the object of the present invention is not impaired.
It may be a copolymer with 0 mol% or less of other polymerizable monomers such as α-olefin, vinyl acetate, and acrylate.

Examples of the copolymer of ethylene and a carboxylic acid or carboxylic acid ester-containing monomer include an ethylene / vinyl acetate copolymer and an ethylene / methacrylic acid copolymer. The copolymer preferably has a content of structural units derived from ethylene of 95 to 70% by weight from the viewpoint of exhibiting good moldability.

In the resin constituting the apertured film, in particular, the resin component or the resin layer (1) of the resin layer forming the surface layer portion is composed of the ethylene / α-olefin copolymer 100 to 100%.
It is preferable that the resin be an ethylene-based polymer containing 50 parts by weight and 0 to 50 parts by weight of a high-pressure low-density polyethylene. The resin component or the resin layer (2) of the other resin layer other than the surface layer contains 100 to 10 parts by weight of an ethylene / α-olefin copolymer and 90 to 100 parts by weight of a high-pressure low-density polyethylene. It is preferable that the material be composed of a polymer mixture.

The filler, which is a component of the aperture film constituting the surface material of the present invention, is not particularly limited as long as it forms a sea-island structure by phase separation with the thermoplastic resin. The filler may be either an inorganic filler or an organic filler. Examples of the inorganic filler include barium sulfate, talc, mica, calcium carbonate, volcanic ash and the like. Examples of the organic filler include cross-linked particles of polymethyl methacrylate (PMMA), fine powder of ultrahigh molecular weight polyethylene (HDPE), and fine powder of various engineering plastics such as polycarbonate. Here, the fine powder means that the primary particle size is 0.5 to 1
It is in the range of 00 μm. The particle shape is preferably elliptical or spherical, rather than laminar or fibrous, because it is more comfortable to the touch. These may be used alone or in combination of two or more.

Among these, barium sulfate has a high specific gravity, so that it is likely to be unevenly distributed on the surface layer of the film, and the rate of exposure from the film surface (state in which the filler is caught from the surface) can be increased, and contact with the skin can be achieved. This is preferable because the area is reduced. It is also excellent in harmlessness to the human body. In particular,
Precipitated or ground barium sulfate is preferred.
Further, the pH of the barium sulfate in the purity test based on the evaluation standard for cosmetic raw materials is preferably 6.5 to 7.5.

The perforated film constituting the surface material of the present invention contains a weather resistance stabilizer as long as the object of the present invention is not impaired.
Additives such as heat stabilizers, antistatic agents, slip agents, antiblocking agents, antifogging agents, lubricants, pigments, dyes, nucleating agents, plasticizers, antioxidants, hydrochloric acid absorbers, antioxidants, etc. as required May be blended. In this case, in particular, the resin 1
0.01 to 1 part by weight of a slip agent with respect to 00 parts by weight,
When 0.05 to 0.5 part by weight, and 0.5 to 15 parts by weight, preferably 1.0 to 10 parts by weight of titanium white are blended, a good one can be obtained in terms of texture and concealment. Can be

The production of the surface material of the present invention comprises the steps of: preparing a resin mixture containing the resin for forming the surface layer (the resin for forming the resin layer (1)), a filler and, if necessary, an additive, A laminated film can be obtained by co-extrusion of another resin forming the resin layer other than the resin layer (the resin forming the resin layer (2)) and molding it by a lamination method. In this case, it is preferable that the resin layer (1) be formed so that the filler having a higher specific gravity than the resin is unevenly distributed in the surface layer portion and partially exposed to the surface with the resin layer (1) facing down. After forming into a laminated film, an apertured film is obtained by subjecting the film to aperture formation.

The method of forming the film may be any method such as a casting method and an inflation film forming method other than the laminating method, and is not particularly limited. Also,
The resin mixture in the surface layer may be melt-kneaded by a two-extrusion extruder or the like before film formation. In addition, the method of forming the hole in the film is also a method of perforating the hole with high-temperature air, a method of perforating the hole with high-pressure hot water,
Any method such as a method of perforating an opening by a heated needle, a method of perforating an opening by a laser,
There is no particular limitation.

As a specific example of the method for producing a surface material according to the present invention, for example, a resin mixture containing a resin for forming the resin layer (1), a filler and, if necessary, the above-mentioned various compounding agents, etc. And a resin layer (2) formed by a co-extrusion laminating method, wherein the resin layer (1) / resin layer (2) has a thickness of 5 μm / 2.
After forming into a laminated film of about 0 μm, the porosity is 45
% Punching metal (pore diameter 1 mm, thickness 0.6 mm,
Surface embossed pattern product) against the film,
A method of performing hole forming by blowing high-temperature air, and the like can be given.

[0042]

EXAMPLES Examples of the present invention and comparative examples are given below.
The present invention will be described more specifically. In the following Examples and Comparative Examples, evaluations of porosity, tensile properties, surface friction, dry feeling, and drapability were performed according to the following methods. (1) Opening Ratio A micrograph of the surface of the surface material was taken, and image processing was performed to calculate the area% of the opening. (2) Tensile properties Measured according to ASTM D638.

(3) Dry Feeling The surface of the apertured film sample cut to the paper processing dimension of row B No. 5 was touched by hand, and the presence or absence of a dry feeling was judged, and evaluated according to the following criteria. ◎ There is a very light feeling. ○ There is a light feeling. △ Somewhat sticky feeling. × There is a sticky feeling. (4) Surface friction A friction tester at 28 ° C (KES, manufactured by Kato Tech Co., Ltd.
-SE type).

(5) Drapability Evaluation was made according to the following criteria from the measurement results obtained by the 45-degree cantilever method. ◎ Both MD and CD are 20 mm or less. ○ More than 20mm for MD and 30mm or less, 20 for CD
mm or less. △ More than 30mm in MD and less than 35mm, 20 in CD
mm and 35 mm or less. × MD and CD both exceeding 35 mm.

Examples 1 to 6 and Comparative Examples In each case, the following resins and fillers were mixed in the proportions shown in Table 1 to produce mixed resins. Next, each resin mixture of the resin layer (1) and the other resin layer (2) was separated into separate extruders (65 mmφ,
L / D: 30) and melt-kneaded at 280 ° C. The ingot was extruded from a die for a laminated film (lip width: 250 mm) at a predetermined composition ratio at a molding speed of 12 m / min to obtain a laminated film.

This laminated film is supplied to a drum formed by punching a punching metal (hole diameter: 1 mm, thickness: 0.6 mm, surface embossed pattern processed product or non-processed product) having a porosity of 45% into a cylindrical shape. 2000 to 25 vacuum
The laminated film was pressed against the surface of the drum at 00 mmAq. At this time, a high-temperature air from a heater at 360 ° C. was supplied through a blow port by a blower at a flow rate of 60 m ^3.
/ H was sprayed to form an aperture, thereby producing an apertured film. The basis weight, porosity, tensile properties and surface friction coefficient of the obtained apertured film were measured, and a dry feeling,
The drapability was evaluated. Table 1 shows the results.

Resin used T-LLDPE: Ethylene-4-methyl-1-pentene copolymer produced using a Ziegler type catalyst (density:
0.915 g / cm ³ , MFR (19 according to ASTM D1238)
(Measured value under a load of 2.16 kg at 0 ° C, the same applies hereinafter): 15 g / 10
M-LLDPE: ethylene / 1-hexene copolymer produced using a metallocene catalyst (density: 0.905 g /
cm ³ , MFR: 4.0 g / 10 min), A: ethylene / 1-butene copolymer (density: 0.890 g)
/ Cm ³ , MFR: 4.0 g / 10 min), HPLD: high-pressure low-density polyethylene (density: 0.91)
7 g / cm ³ , MFR: 7.0 g / 10 min).

Filler used BaSO ₄ : pulverized barium sulfate (average particle size 5.5 μm)
m).

[0049]

[Table 1]

[0050]

The surface material of the present invention is composed of a perforated film having a sea-island structure in which a filler is dispersed in the surface layer, and the dispersed portion (island portion) of the sea-island structure is caught on the surface of the perforated film. By doing so, it is possible to reduce the contact area with the skin, and it is excellent in the balance between touch, flexibility, liquid permeability, liquid return prevention, and concealment. Further, the surface material of the present invention can be sufficiently manufactured using general-purpose equipment, and therefore has high industrial value.

[Brief description of the drawings]

FIG. 1 is an electron micrograph (× 30) taken from a surface layer portion of a surface material (apertured film) of an absorbent article according to the present invention.

FIG. 2 is an electron micrograph (× 30) of a cross section of a surface material (apertured film) of the absorbent article according to the present invention.

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[Procedure amendment]

[Submission date] June 9, 2000 (200.6.9)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) A61L 15/00 (C08L 23/08 4J002 C08K 3/30 23:06) C08L 23/08 A41B 13/02 E // ( C08L 23/08 A61F 13/18 310A 23:06) F-term (reference) 3B029 BB03 BB05 4C003 BA02 BA03 BA06 BA08 4C081 AA02 AA12 BB01 BB02 CA021 CA121 CC01 CF24 DA02 DC04 4C098 AA09 CC03 DD16 DD24 4F100 AA07AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA6A AK62B AL05A AL05B BA02 BA16 BA27 CA23A DJ10A DJ10B GB72 JA13 JA20A JA20H JD05 JD14 YY00 YY00A YY00B YY00H 4J002 BB031 BB032 BB051 BB071 BB081 BB111 BB151 CF001 CL001 DE236 DG046 DJ046 DJ046

Claims (8)

[Claims] 1. A surface material comprising a resin film which covers the surface of a liquid absorber disposed inside an absorbent article and has openings for liquid permeation, wherein the resin film has a filler dispersed therein. A surface material of an absorbent article which is a laminated film having a sea-island structure and a resin layer forming a surface layer portion in which the content of the filler in the sea-island structure is 30 to 80% by weight, and other resin layers. 2. The surface material for an absorbent article according to claim 1, wherein the filler has an average particle size of 2 to 8 μm. 3. The surface material for an absorbent article according to claim 1, wherein the filler is barium sulfate. 4. The surface material for an absorbent article according to claim 3, wherein the pH of the barium sulfate in a purity test of a cosmetic raw material standard evaluation is 6.5 to 7.5. 5. The resin component of the resin layer forming the surface layer of the resin film comprises 100 to 50 parts by weight of an ethylene / α-olefin copolymer and 0 to 5 high-pressure low-density polyethylene.
5. An ethylene polymer containing 0 parts by weight.
The surface material of the absorbent article according to any one of the above. 6. The resin component of the other resin layer of the resin film is an ethylene / α-olefin copolymer 100 to
An ethylene-based polymer mixture containing 10 parts by weight and 90 to 100 parts by weight of a high-pressure low-density polyethylene.
5. The surface material of the absorbent article according to any one of 5. 7. The composition ratio (weight ratio) of the surface layer portion to the other resin layer portion is in the range of 1/4 to 1/1.
7. The surface material of the absorbent article according to any one of 6. 8. The method according to claim 1, wherein the basis weight is 5 to 50 g / m ^2.
The surface material of the absorbent article according to any one of claims 1 to 7.