JP2014221171A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article for preventing the outside and the periphery of the absorbent article from getting wet due to the dew condensation of moisture coming out of the inside of the absorbent article.SOLUTION: An absorbent article 1 includes an absorbent body 2 and an armoring sheet material 11 on the outer surface side of the absorbent body. The armoring sheet material uses a sheet with high air permeability and low moisture permeability, whose air permeability resistance is 240 (seconds/100 cc) or less, and moisture vapor transmission rate is 3400 (g/m24Hr) or less.

Description

  The present invention relates to an absorbent article.

Moisture permeable sheets are used as exterior sheet materials (back materials) for absorbent articles such as disposable diapers and sanitary napkins from the viewpoint of preventing stuffiness and fogging. For example, Patent Document 1 discloses an absorbent article using a moisture-permeable sheet obtained by laminating a microporous polyolefin moisture-permeable resin film and a nonwoven fabric as a back material. In Patent Document 2, an opaque region having a total light transmittance of less than 50% and a transparent region having a total light transmittance of 50% or more are formed on a moisture-permeable sheet, and the moisture permeability is 0.8 to 4 g / 10cm is 2 · ^h, an absorbent article using the porous sheet area of the transparent region is 5 to 30% by rear material is disclosed. In Patent Document 3, the ultraviolet transmittance is 10% or less, the whiteness is 65 or more, the total light transmittance is 35% or less, the moisture permeability is 1 kg / (m ² · 24 hr) or more, and the water pressure resistance is 4.9 kPa or more. An absorbent article using a moisture-permeable sheet as a leak-proof layer is disclosed. In Patent Document 4, a moisture-permeable sheet formed by laminating a non-woven fabric with a microporous polyolefin moisture-permeable resin film formed of a crystalline polyolefin resin not containing an additive used for opening is used as a back material. An absorbent article was disclosed.

  In an absorbent article using a moisture-permeable sheet as a back material, water vapor that escapes from the inside of the absorbent article is condensed on the outer surface of the absorbent article, and the skin or wear of the wearer wearing the absorbent article There was a problem of getting wet the goods. Moreover, when the skin or the worn article becomes wet due to condensation, it is uncomfortable and the worn article may need to be replaced.

  For solving such problems, for example, absorbent articles of Patent Documents 5 and 6 have been proposed. Patent Document 5 discloses an absorbent article applied to a region including a crotch portion of a wearer, wherein the absorbent core absorbs moisture, and at least a part of the region has water permeability, and the skin of the absorbent core. An inner sheet member disposed on the surface side, and an outer sheet member disposed on the outer surface side of the absorbent core, the outer sheet member including a porous resin film having air permeability and waterproofness, and air permeability There is disclosed an absorbent article comprising a water-absorbing sheet having a water-absorbing property and a water-absorbing sheet superimposed on the outer surface side of the porous resin film.

  Patent Document 6 discloses a urine absorption pad applied to a region including a crotch portion of a wearer, wherein the absorption core absorbs moisture, and at least a part of the region has water permeability, and the skin of the absorption core. An inner sheet member disposed on the surface side, and an outer sheet member disposed on the outer surface side of the absorbent core, the outer sheet having a porous resin film having breathability and waterproofness, and breathability An exterior sheet that is superimposed on the outer surface side of the porous resin film, and a water-absorbing polymer mixed therein, provided between the porous resin film and the exterior sheet, and an adhesive that joins both. There is disclosed a urine absorbing pad comprising the urine absorbing pad.

JP-A-9-76386 JP 11-349702 A JP 2001-106817 A JP 2004-136678 A JP 2011-182906 A JP 2011-182907 A

  The present invention has been made in view of the above circumstances, and in an absorbent article, there is provided an absorbent article that prevents the outside and surroundings of the absorbent article from getting wet due to condensation of water vapor that has escaped from the inside of the absorbent article. The purpose is to provide.

The absorbent article of the present invention is an absorbent article having an absorbent body and an exterior sheet material on the outer surface side of the absorbent body, and the exterior sheet material has an air permeability resistance of 240 (seconds / 100 cc) or less. The moisture permeability is 3400 (g / m ² · 24 Hr) or less. The gist of the present invention is that a sheet having high air permeability but low water vapor permeability is used as an exterior sheet material for absorbent articles. That is, the exterior sheet material used in the present invention has an air permeability resistance of 240 (sec / 100 cc) or less and a high air permeability, but the moisture permeability is 3400 (g / m ² · 24 Hr). ) The water vapor permeability is low. Therefore, the water vapor that has escaped from the interior of the absorbent article is suppressed from passing through the exterior sheet material. However, since air permeability is high and air is circulated inside the absorbent article, stuffiness is reduced. In the following description, a sheet having high air permeability but low water vapor permeability may be simply referred to as a “highly breathable / low moisture permeable sheet”.

  As the exterior sheet material, it is preferable that the surface of the porous sheet is obtained by applying an aerobic treatment agent having a SP value lower than the SP value of water (solubility parameter), The porous sheet can be obtained, for example, by forming a resin composition for a sheet in which a filler is mixed with a thermoplastic resin into a sheet, and then stretching the sheet. Moreover, the said exterior sheet agent treats the surface of a filler with the aerobic treatment agent which has a site | part of SP value lower than SP value (solubility parameter) of water, and the obtained filler is made into a thermoplastic resin. The compounded resin composition for a sheet may be obtained by forming into a sheet and then stretching. For example, polyolefin is preferable as the thermoplastic resin.

  The aerobic treatment agent is preferably a compound having an SP value lower than the SP value of the thermoplastic resin, and more preferably a compound having an SP value (solubility parameter) of 6 to 7.5. .

  As an absorptive article of the present invention, a deployment type or underpants type disposable diaper can be mentioned, for example.

  ADVANTAGE OF THE INVENTION According to this invention, the dew condensation of the water vapor | steam on the outer side of an absorbent article can be suppressed, and there is also no problem of stuffiness.

The top view (development figure) of an example of the absorbent article of this invention. The typical sectional view of the II line of Drawing 1. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1. The typical sectional view of another example of the absorptive article of the present invention. The schematic diagram which shows the sealing state of the absorbent article in a monitor test.

The absorbent article of the present invention is an absorbent article having an absorbent body and an exterior sheet material on the outer surface side of the absorbent body, and the exterior sheet material has an air permeability resistance of 240 (seconds / 100 cc) or less. The moisture permeability is 3400 (g / m ² · 24 Hr) or less.

  First, the exterior sheet material used in the present invention will be described. The exterior sheet material has an air resistance of 240 (seconds / 100 cc) or less, preferably 210 (seconds / 100 cc) or less, more preferably 180 (seconds / 100 cc) or less, and 100 (seconds / 100 cc) or less. Is particularly preferred. The air resistance indicates the air permeability, and a smaller numerical value means that air is more easily transmitted. If the air resistance of the exterior sheet material is 240 (second / 100 cc) or less, the air permeability is high. Since air permeates from the outside to the inside of the absorbent article and the air inside the absorbent article is circulated, stuffiness can be prevented. The lower limit of the air resistance of the exterior sheet material is not particularly limited, but is preferably 8 (seconds / 100 cc), and more preferably 10 (seconds / 100 cc). This is because if the air resistance is less than 8 (seconds / 100 cc), the waterproofness of the sheet may be inferior.

The exterior sheet material used in the present invention has a moisture permeability of 3400 (g / m ² · 24 Hr) or less, preferably 3200 (g / m ² · 24 Hr) or less, and preferably 3000 (g / m ² · 24 Hr) or less. Is more preferable, and 2000 (g / m ² · 24 Hr) or less is particularly preferable. The moisture permeability indicates the permeability of water vapor, and a larger value means that water vapor is more easily transmitted. If the water vapor transmission rate is 3400 (g / m ² · 24 Hr) or less, it is possible to prevent water vapor that has escaped from the interior of the absorbent article from passing through the exterior sheet material. The lower limit of the moisture permeability of the exterior sheet material is not particularly limited, but is preferably 80 (g / m ² · 24 Hr), more preferably 100 (g / m ² · 24 Hr), and 120 (g / m ² · 24 Hr). Is more preferable. If the moisture permeability of the exterior sheet material is less than 80 (g / m ² · 24 Hr), air permeability may be inferior.

It is preferable that the exterior sheet material has water resistance comparable to that of a general exterior sheet. The water pressure resistance of the exterior sheet material is preferably 8 kPa or more, and more preferably 10 kPa or more. The basis weight of the outer sheet material, from the viewpoint of the longitudinal tear strength and CD tensile strength is preferably 10 g / ^{m 2} or more, 12 g / ^{m 2} or more, and further preferably 15 g / ^{m 2} or more, 65 g / m ² or less is preferable, 63 g / m ² or less is more preferable, and 60 g / m ² or less is more preferable.

  As thickness of the said exterior sheet | seat material, 18 micrometers or more are preferable, 20 micrometers or more are more preferable, 45 micrometers or less are preferable, and 43 micrometers or less are more preferable. This is because if the thickness is within the above range, the strength can be maintained while maintaining moisture permeability and air permeability.

  As the exterior sheet material, it is preferable to use, for example, a highly air permeable and low moisture permeable sheet obtained by subjecting a porous sheet having pores to aerophilic treatment.

  The porous sheet is preferably obtained by, for example, melt-kneading a resin composition for a sheet in which a filler is blended with a thermoplastic resin, forming the sheet into a sheet, and then performing a uniaxial or biaxial stretching treatment. . By stretching, pores are formed around the filler. As the thermoplastic resin, polyolefin is preferable. This is because liquid impermeability can be imparted to the resulting exterior sheet material. As said polyolefin, the homopolymer or copolymer of an olefin, and the copolymer of an olefin and another monomer can be used by these 1 type, or 2 or more types. As the olefin, ethylene or propylene is preferably used. In particular, the polyolefin is preferably high-density polyethylene, low-density polyethylene, or linear low-density polyethylene.

  The pore diameter of the porous sheet is preferably 0.3 μm or more, more preferably 0.5 μm or more, further preferably 0.7 μm or more, preferably 3.0 μm or less, more preferably 2.8 μm or less, 2.5 μm. The following is more preferable.

  In the present invention, the aerobic treatment means that the surface of the object to be treated is a compound having an SP value lower than the SP value (solubility parameter) of water (hereinafter referred to as “aerobic treatment agent”). Process). The SP value of water (SP value: 23) is high. If the periphery of the pores of the porous sheet is treated with a compound having an SP value lower than the SP value of water, the porous sheet will not allow water vapor to permeate even though it has pores. It becomes like this. In the present invention, the solubility parameter is determined by the method proposed by Fedors et al. [Poym. Eng. Sci. 14 (2) 152, (1974)].

  The compound having an SP value lower than the SP value of water is not particularly limited as long as it has an SP value lower than the SP value of water in at least a part of the skeleton of the compound. This is because if there is a portion having an SP value lower than the SP value of water, this portion is arranged around the pores to suppress the permeation of water vapor. However, from the viewpoint of more efficiently suppressing water vapor permeability, the content of the SP value portion lower than the water SP value in the compound having the SP value portion lower than the water SP value is 50 It is preferably at least 70% by mass, more preferably at least 70% by mass, and more preferably the SP value of the entire compound is lower than the SP value of water.

  Further, empirically, it is said that the permeability coefficient values of oxygen and nitrogen show maximum values when the SP value is in the range of 7 to 8, and become significantly smaller when the SP value is 6 or less or 9 or more. However, in the present invention, it is preferable to treat the porous sheet with a compound having an SP value portion lower than the SP value of the thermoplastic resin component constituting the porous sheet. The compound having an SP value portion lower than that of the thermoplastic resin component is not particularly limited as long as it has an SP value portion lower than the SP value of the thermoplastic resin component in at least a part of the skeleton of the compound. This is because if there is a portion having an SP value lower than the SP value of the thermoplastic resin component, this portion is arranged around the pores to suppress the permeation of water vapor. However, from the viewpoint of more efficiently suppressing the water vapor permeability, the part having an SP value lower than the SP value of the thermoplastic resin component in the compound having the SP value part lower than the SP value of the thermoplastic resin component. The content of is preferably 50% by mass or more, more preferably 70% by mass or more, and further preferably the SP value of the entire compound is lower than the SP value of the thermoplastic resin component.

  For example, when the porous sheet is a polyolefin-made porous sheet, it is preferable to treat with a compound having a portion having an SP value lower than that of the polyolefin. A compound having an SP value higher than that of polyolefin has high hydrophilicity, and the pores treated with such a compound easily transmit water vapor. Moreover, if it is a compound which has the site | part of the SP value substantially the same as polyolefin, since a compound will adapt to the whole film, it may become difficult to make the periphery of a pore aerophilic. From the viewpoint described above, in the present invention, it is preferable to use a sheet obtained by treating a porous polyolefin sheet with a compound having an SP value of 6 to 7.5 as the exterior sheet material. In addition, the SP value of polyolefin such as polyethylene (SP value: 8.0) and polypropylene (SP value: 8.0) is about 8 to 10.

  The compound having a portion having an SP value of 6 to 7.5 is not particularly limited as long as it has a portion having an SP value of 6 to 7.5 in at least a part of the skeleton of the compound. This is because if there is a portion having an SP value of 6 to 7.5, this portion is arranged around the pores to suppress the permeation of water vapor. However, from the viewpoint of more efficiently suppressing water vapor permeability, the content of the portion having an SP value of 6 to 7.5 in the compound having the portion having an SP value of 6 to 7.5 is 50 % By mass or more is preferable, 70% by mass or more is more preferable, and the SP value of the whole compound is more preferably 6 to 7.5.

  Examples of the compound having an SP value of 6 to 7.5 include a compound having a polysiloxane structure, a [compound having dimethylsiloxane (7.3), etc.], and a compound containing a hydrocarbon group having a fluorine atom. , [Compounds having tetrafluoroethylene (6.2), etc.] and the like.

  Examples of the compound having a polysiloxane structure include polydimethylsiloxane; polyether-modified polysiloxane such as polyoxyethylene-modified polysiloxane and poly (oxyethylene oxypropylene) -modified polysiloxane; carboxy-modified polysiloxane; epoxy-modified polysiloxane; Modified polysiloxanes; alkoxy-modified polysiloxanes, and mixtures thereof.

  The position of the organic group (modified group) of the modified silicone such as polyether-modified polysiloxane, carboxy-modified polysiloxane, epoxy-modified polysiloxane, and amino-modified polysiloxane is not particularly limited. Either the terminal, one end of polysiloxane, or both side chain and both terminals of polysiloxane may be used. Among these, from the viewpoint of absorption characteristics, both the side chain of polysiloxane and the side chain and both ends of polysiloxane are preferred, and both the side chain and both ends of polysiloxane are more preferred.

  The organic group (modified group) of the polyether-modified polysiloxane includes a group containing a polyoxyethylene chain or a poly (oxyethylene / oxypropylene) chain. The number of oxyethylene units and / or oxypropylene units contained in the polyether-modified polysiloxane is preferably 2-40, more preferably 5-30, more preferably 7-per molecule of the polyether-modified polysiloxane. 20 is more preferable, and 10 to 15 is most preferable. When the number of oxyethylene units and / or oxypropylene units contained in the polyether-modified polysiloxane is within the above range, the outside and surroundings of the absorbent article are wetted by condensation of water vapor that has escaped from the interior of the absorbent article. The performance to prevent is improved. When the oxyethylene group and the oxypropylene group are contained, the content (% by mass) of the oxyethylene group and the oxypropylene group is preferably 1% by mass to 30% by mass in 100% by mass of the polyether-modified polysiloxane. 3 mass%-25 mass% are more preferable, and 5 mass%-20 mass% are still more preferable. If the content of oxyethylene group and oxyproxylene group is within the above range, the performance of preventing the outside and surroundings of the absorbent article from getting wet due to condensation of water vapor that has escaped from the inside of the absorbent article will be good. .

The polyether-modified polysiloxane can be easily obtained from the market. For example, the following products {modified position, type of oxyalkylene} can be preferably exemplified.
-Shin-Etsu Chemical Co., Ltd. KF-945 {side chain, oxyethylene and oxypropylene}, KF-6020 {side chain, oxyethylene and oxypropylene}, X-22-6191 {side chain, oxyethylene and oxypropylene} X-22-4922 {side chain, oxyethylene and oxypropylene}, X-22-4272 {side chain, oxyethylene and oxypropylene}, X-22-6266 {side chain, oxyethylene and oxypropylene}

FZ-2110 {both ends, oxyethylene and oxypropylene}, FZ-2122 {both ends, oxyethylene and oxypropylene}, FZ-7006 {both ends, oxyethylene and oxypropylene}, manufactured by Toray Dow Corning Co., Ltd. FZ-2166 {both ends, oxyethylene and oxypropylene}, FZ-2164 {both ends, oxyethylene and oxypropylene}, FZ-2154 {both ends, oxyethylene and oxypropylene}, FZ-2203 {both ends, oxy Ethylene and oxypropylene} and FZ-2207 {both ends, oxyethylene and oxypropylene}

  The organic group (modified group) of the carboxy-modified polysiloxane includes a group containing a carboxy group, and the organic group (modified group) of the epoxy-modified polysiloxane includes a group containing an epoxy group. Examples of the organic group (modified group) of polysiloxane include groups containing amino groups (1, 2, and tertiary amino groups). The organic group (modified group) content (g / mol) of these modified silicones is preferably 200 to 11,000, more preferably 600 to 8000, and still more preferably 1000 to 4000 as carboxy equivalent, epoxy equivalent or amino equivalent. It is. The content (g / mol) of the organic group (modified group) of the modified silicone is such that the carboxy equivalent, the epoxy equivalent or the amino equivalent is within the above range due to the condensation of water vapor that has escaped from the inside of the absorbent article. The performance of preventing the outside and surroundings of the article from getting wet is improved. The carboxy equivalent is measured according to “16. Total acid value test” of JIS C2101: 1999. Moreover, an epoxy equivalent is calculated | required based on JISK7236: 2001. The amino equivalent is measured according to “8. Potentiometric titration method (base number / hydrochloric acid method)” of JIS K2501: 2003.

The carboxy-modified polysiloxane can be easily obtained from the market. For example, the following products {modified position, carboxy equivalent (g / mol)} can be preferably exemplified.
* Shin-Etsu Chemical Co., Ltd. X-22-3701E {side chain, 4000}, X-22-162C {both ends, 2300}, X-22-3710 {single end, 1450}

-BY 16-880 {side chain, 3500}, BY 16-750 {both ends, 750}, BY 16-840 {side chain, 3500}, SF8418 {side chain, 3500} manufactured by Toray Dow Corning Co., Ltd.

The epoxy-modified polysiloxane can be easily obtained from the market. For example, the following products {modified position, epoxy equivalent} can be preferably exemplified.
* Shin-Etsu Chemical Co., Ltd. X-22-343 {side chain, 525}, KF-101 {side chain, 350}, KF-1001 {side chain, 3500}, X-22-2000 {side chain, 620} X-22-2046 {side chain, 600}, KF-102 {side chain, 3600}, X-22-4741 {side chain, 2500}, KF-1002 {side chain, 4300}, X-22-3000T {Side chain, 250}, X-22-163 {both ends, 200}, KF-105 {both ends, 490}, X-22-163A {both ends, 1000}, X-22-163B {both ends, 1750}, X-22-163C {both ends, 2700}, X-22-169AS {both ends, 500}, X-22-169B {both ends, 1700}, X-22-173DX {single end, 4500} , X-22-9002 { Chain-both ends, 5000}

-FZ-3720 {Side Chain, 1200}, BY16-839 {Side Chain, 3700}, SF 8411 {Side Chain, 3200}, SF 8413 {Side Chain, 3800}, SF 8421 {Side, manufactured by Toray Dow Corning Co., Ltd. Chain, 11000}, BY 16-876 {side chain, 2800}, FZ-3736 {side chain, 5000}, BY 16-855D {side chain, 180}, BY 16-8 {side chain, 3700}

The amino-modified silicone can be easily obtained from the market. For example, the following products {modified position, amino equivalent} can be preferably exemplified.
* Shin-Etsu Chemical Co., Ltd. KF-865 {side chain, 5000}, KF-864 {side chain, 3800}, KF-859 {side chain, 6000}, KF-393 {side chain, 350}, KF-860 {Side Chain, 7600}, KF-880 {Side Chain, 1800}, KF-8004 {Side Chain, 1500}, KF-8002 {Side Chain, 1700}, KF-8005 {Side Chain, 11000}, KF-867 {Side Chain, 1700}, X-22-3820W {Side Chain, 55000}, KF-869 {Side Chain, 8800}, KF-861 {Side Chain, 2000}, X-22-3939A {Side Chain, 1500} , KF-877 {side chain, 5200}, PAM-E {both ends, 130}, KF-8010 {both ends, 430}, X-22-161A {both ends, 800}, X-22-161B {both Terminal 1500 , KF-8012 {both ends, 2200}, KF-8008 {both ends, 5700}, X-22-1660B-3 {both ends, 2200}, KF-857 {side chain, 2200}, KF-8001 {side Chain, 1900}, KF-862 {side chain, 1900}, X-22-9192 {side chain, 6500}

-FZ-3707 {side chain, 1500}, FZ-3504 {side chain, 1000}, BY 16-205 {side chain, 4000}, FZ-3760 {side chain, 1500}, FZ manufactured by Toray Dow Corning Co., Ltd. -3705 {side chain, 4000}, BY 16-209 {side chain, 1800}, FZ-3710 {side chain, 1800}, SF8417 {side chain, 1800}, BY 16-849 {side chain, 600}, BY 16-850 {side chain, 3300}, BY 16-879B {side chain, 8000}, BY 16-892 {side chain, 2000}, FZ-3501 {side chain, 3000}, FZ-3785 {side chain, 6000 }, BY 16-872 {side chain, 1800}, BY 16-213 {side chain, 2700}, BY 16-203 {side chain, 1900}, BY 16-898 {side chain, 2900 BY 16-890 {side chain, 1900}, BY 16-893 {side chain, 4000}, FZ-3789 {side chain, 1900}, BY 16-871 {both ends, 130}, BY 16-853C {both Terminal 360}, BY 16-853U {both ends, 450}

  Examples of these mixtures include a mixture of polydimethylsiloxane and carboxyl-modified polysiloxane, a mixture of polyether-modified polysiloxane and amino-modified polysiloxane, and the like.

    Examples of the compound containing a hydrocarbon group having a fluorine atom include perfluoroalkane, perfluoroalkene, perfluoroaryl, perfluoroalkyl ether, perfluoroalkylcarboxylic acid or a salt thereof, perfluoroalkyl alcohol, and two of these A mixture of seeds or more is included.

  The perfluoroalkane is preferably an alkane having 4 to 42 fluorine atoms and 1 to 20 carbon atoms. Examples of the perfluoroalkane include trifluoromethane, pentafluoroethane, pentafluoropropane, heptafluoropropane, heptafluorobutane, nonafluorohexane, tridecafluorooctane, and heptadecafluorododecane.

  The perfluoroalkene is preferably an alkene having 4 to 42 fluorine atoms and 2 to 20 carbon atoms. Examples of the perfluoroalkene include trifluoroethylene, pentafluoropropene, trifluoropropene, heptafluorobutene, nonafluorohexene, tridecafluorooctene, and heptadecafluorododecene.

  As perfluoroaryl, aryl having 4 to 42 fluorine atoms and 6 to 20 carbon atoms is preferable. Examples of perfluoroaryl include trifluorobenzene, pentafluorotoluene, trifluoronaphthalene, heptafluorobenzene, nonafluoroxylene, tridecafluorooctylbenzene, and heptadecafluorododecylbenzene.

  The perfluoroalkyl ether is preferably an ether having 2 to 82 fluorine atoms and 2 to 40 carbon atoms. Examples of perfluoroalkyl ethers include ditrifluoromethyl ether, dipentafluoroethyl ether, dipentafluoropropyl ether, diheptafluoropropyl ether, diheptafluorobutyl ether, dinonafluorohexyl ether, ditridecafluorooctyl ether, and And diheptadecafluorododecyl ether.

  As the perfluoroalkylcarboxylic acid or a salt thereof, a carboxylic acid having 3 to 41 fluorine atoms and 1 to 21 carbon atoms or a salt thereof is preferable. Examples of perfluoroalkyl carboxylic acids or salts thereof include pentafluoroethanoic acid, pentafluoropropanoic acid, heptafluoropropanoic acid, heptafluorobutanoic acid, nonafluorohexanoic acid, tridecafluorooctanoic acid, heptadecafluorododecanoic acid, Or these metal salts are mentioned. As the metal salt, an alkali metal salt or an alkaline earth metal salt is preferable.

  The perfluoroalkyl alcohol is preferably an alcohol having 3 to 41 fluorine atoms and 1 to 20 carbon atoms. Examples of perfluoroalkyl alcohols include pentafluoroethanol, pentafluoropropanol, heptafluoropropanol, heptafluorobutanol, nonafluorohexanol, tridecafluorooctanol, heptadecafluorododecanol, and ethylene of these alcohols. Examples include oxide (1 to 20 mol per 1 mol of alcohol) adduct.

  Examples of the mixture of two or more of these include a mixture of perfluoroalkylcarboxylic acid and perfluoroalkyl alcohol. For example, a mixture of pentafluoroethanoic acid and pentafluoroethanol is preferable.

The amount of the aerobic treatment agent to be treated on the porous sheet is 5 to 750 ppm, preferably 7 to 600 ppm, more preferably 10 to 500 ppm based on the porous sheet. If the amount of the aerobic treatment agent is less than 5 ppm, the effect of aerobicizing the obtained sheet may be insufficient. If it exceeds 750 ppm, the improvement of the aerobic effect is not seen, and it may be worsened.

  The filler used in the sheet resin composition for forming the porous sheet is not particularly limited, but examples thereof include calcium carbonate, gypsum, calcium sulfate, calcium phosphate, magnesium carbonate, magnesium sulfate, and hydrated silica. Acid, anhydrous silicic acid, soda ash, sodium chloride, sodium sulfate, barium sulfate, talc, clay, various cements, volcanic ash, shirasu, titanium oxide, iron oxide, carbon black, inorganic fillers, various metal powders, etc. Inorganic and organic metal salts mainly composed of inorganic substances, thermosetting resins such as phenolic resin, epoxy resin and sodium polyacrylate, and resins obtained by crosslinking thermoplastic resins such as polyethylene, polypropylene and polyacrylate with radiation Or a resin-like resin whose melting temperature is higher than the molding temperature of the porous sheet. Ma and the like.

  The volume average particle diameter of the filler blended in the resin composition for sheet is preferably 0.1 μm or more, more preferably 0.2 μm or more, further preferably 0.3 μm or more, preferably 10 μm or less, more preferably 8 μm or less. Preferably, it is 6 μm or less. The maximum particle size is preferably 25 μm or less, more preferably 20 μm or less, and even more preferably 15 μm or less. The filler blended in the resin composition for a sheet preferably has a volume average particle size of 0.3 μm or more and 8 μm or less and a maximum particle size of 20 μm or less, and the volume average particle size is 0. More preferably, the particle diameter is 5 μm or more and 5 μm or less, and the maximum particle size is 15 μm or less.

  When the volume average particle diameter of the filler is increased, the pore diameter of the pores of the porous sheet is increased, and the water vapor transmission rate may be increased. Moreover, since the pores become large, the water resistance and strength of the porous sheet may be lowered. In addition, if the volume average particle diameter of the filler is too small, it is difficult to uniformly disperse the filler during kneading, and agglomeration of filler particles is likely to occur in the sheet-like molded product, and uniform stretching is performed. It becomes difficult to cause breakage during the stretching process.

The blending amount of the filler is preferably 100 parts by mass or more, more preferably 110 parts by mass or more, further preferably 120 parts by mass or more, and preferably 300 parts by mass or less, with respect to 100 parts by mass of the thermoplastic resin component. The amount is more preferably equal to or less than part by weight, and further preferably equal to or less than 200 parts by weight. When the blending amount of the filler is less than 100 parts by mass, the moisture permeability of the obtained sheet may be insufficient. On the other hand, if the blending amount of the filler exceeds 300 parts by mass, the water resistance of the sheet decreases, the liquid tends to bleed, the strength decreases, and the moldability may also deteriorate. .

  In the present invention, instead of applying the surface of the porous sheet with an aerobic treatment agent, a porous sheet may be prepared using a filler surface-treated with an aerobic treatment agent in advance. By using a filler that has been surface-treated with an aerophilic treatment agent, the periphery of the pores is subjected to an aerophilic treatment, and a highly breathable and low moisture permeable sheet is obtained.

  In the sheet resin composition, a third component can be added in addition to the above-described thermoplastic resin and filler. By adding the third component, it is possible to give a supple texture, reduction of noise, slipperiness, and improve stretchability. As the third component, a plasticizer or a lubricant that is usually mixed with rubber or plastic can be used. For example, a monoester composed of a fatty acid and an aliphatic alcohol, or a monoester composed of an aromatic carboxylic acid and an aliphatic alcohol. Esters or polyesters, polyesters composed of aliphatic polycarboxylic acids and polyalcohols, monocarboxylic acids and / or polyesters composed of polycarboxylic acids and monoalcohols and / or polyalcohols, alcohol and / or a part of carboxylic acids are left. Esters or polyesters, aliphatic amides, aromatic amides, fatty acid metal soaps, aromatic carboxylic acid metal soaps, butadiene oligomers, butene oligomers, isobutylene oligomers, isoprene oligomers, petroleum resins, coumarone resins, ketone resins, chlorinated paraffins , Machine oil, silicone oil, liquid paraffin, polyethylene wax. Among these, it is particularly preferable to blend a specific polyester as the third component. This polyester is a polyester of a polybasic acid, a polyhydric alcohol, a monobasic acid having 14 to 22 carbon atoms, and / or a monohydric alcohol having 12 to 22 carbon atoms. By blending this polyester, the flow characteristics of the polyolefin resin composition can be further desired. As a result, the generation of burnt chips, resin gelation, etc., is further suppressed during molding, and the moldability is further improved. The combination of each component constituting the polyester is selected in consideration of the number of ester groups in a certain weight of the polyester and the degree of branching of the hydrocarbon chain from the balance of the affinity with the polyolefin resin and the filler.

  As the monobasic acid in the polyester, a long-chain hydrocarbon monocarboxylic acid having 14 to 22 carbon atoms or the like is used. As the polybasic acid, dicarboxylic acid, tricarboxylic acid, tetracarboxylic acid and the like are used. As the monohydric alcohol, a long-chain hydrocarbon monoalcohol having 12 to 22 carbon atoms is used. As the polyhydric alcohol, diols, trimethylolpropane, pentaerythritol, dipentaerythritol, sorbitol, sucrose and the like are used. When the number of carbons of monobasic acid is 12 or less, or the number of carbons of monohydric alcohol is 10 or less, the balance of affinity for polyolefin resin and filler is shifted, and the polyester is partially concentrated and stretched during film molding. Occasionally, unevenness may occur and the vertical tear strength may be reduced.

The polyester is a polyester obtained by dehydrating and condensing a polybasic acid and a polyhydric alcohol. When the terminal is a carboxylic acid, most of the polyester is a long-chain hydrocarbon monoester such as stearyl alcohol, oleyl alcohol, or gerbe alcohol. It is preferably esterified with alcohol. In the case where the terminal is an alcohol, most of the terminal is preferably an end-capped polyester esterified with a monocarboxylic acid of a long chain hydrocarbon such as stearic acid, hydroxystearic acid, oleic acid, and isostearic acid. However, even in these cases, not all ends need to be blocked. Even more preferred are esters containing branched acids or alcohols as ester constituents.

  Examples of preferred specific polyesters are polyesters in which the carboxylic acid or alcohol at both ends of the polyester of diethylene glycol and dimer acid is partially or completely blocked with stearyl alcohol or stearic acid, 1,3-butanediol and adipic acid Polyester having both ends of the polyester blocked with hydroxystearic acid, hexaester composed of trimethylolpropane-adipic acid-stearic acid, octaester composed of pentaerythritol-adipic acid-stearic acid, dipentaerythritol-adipic acid-stearin Dodecaester consisting of acid, polyester using dimer acid or hydrogenated dimer acid instead of adipic acid, which is a component of the polyester, and isostearic acid instead of stearic acid Polyester.

  1 mass part or more is preferable with respect to 100 mass parts of thermoplastic resins, the compounding quantity of the said polyester has more preferable 2 mass parts or more, 40 mass parts or less are preferable, and 35 mass parts or less are more preferable. Good fluidity, supple texture, reduction of squealing, slipperiness, stretchability, etc. during molding.

  To the resin composition for sheets, stearic acid can be blended for the purpose of improving the dispersibility of the filler. The blending amount of stearic acid is preferably 0.1 parts by mass or more, more preferably 0.3 parts by mass or more, preferably 3.5 parts by mass or less, and 3.0 parts by mass or less with respect to 100 parts by mass of the filler. Is more preferable.

  In addition to the components described above, the resin composition for sheets used in the present invention may be blended with a plasticizer, a stabilizer, an antioxidant, an ultraviolet absorber, and the like as long as the effects of the present invention are not hindered. . The resin composition for a sheet may further contain additives such as a colorant, a lubricant, and a dispersant as necessary.

  It is also preferable to use a laminate in which a nonwoven fabric is laminated on a porous sheet as the exterior sheet material. In this case, the nonwoven fabric to laminate | stack is not specifically limited, For example, a spun bond nonwoven fabric, a point bond nonwoven fabric, an SMS nonwoven fabric, an air through nonwoven fabric etc. can be mentioned.

  The absorbent article of this invention will not be specifically limited if it has the said exterior sheet | seat material in the outer surface side of an absorber and the said absorber. If the highly breathable and low moisture permeable exterior sheet material is disposed on the outer surface side of the absorbent body, it prevents stuffiness on the inside of the absorbent article and prevents condensation on the outside of the absorbent article. Because you can. Hereinafter, the absorbent article of this invention is demonstrated based on the aspect of a disposable diaper.

  As one aspect of the disposable diaper of the present invention, an absorbent body, a liquid-permeable top sheet disposed on the skin surface side of the absorbent body, and a liquid-impermeable back sheet disposed on the outer surface side of the absorbent body As the liquid-impervious back sheet, an embodiment in which a highly breathable / low moisture-permeable exterior sheet material is employed can be exemplified. Moreover, the side sheet | seat may be provided in the width direction both sides of the said liquid-permeable top sheet as needed. The side sheet is bonded to the upper part of both side edges in the width direction of the top sheet, and the side sheet inward from the bonding point forms a pair of rising flaps along both side edges of the absorbent body.

  Moreover, as another aspect of the disposable diaper of the present invention, an absorbent main body having an absorbent body between a liquid-permeable top sheet and a liquid-impervious back sheet, and an inner side on the outer surface side of the absorbent main body A water-absorbent article having a sheet and a laminate composed of an outer sheet, and employing a highly breathable and low moisture-permeable exterior sheet material can be mentioned as the laminate. A pair of rising flaps may be formed along the both side edges of the absorbent body at the top of both side edges in the width direction of the liquid-permeable top sheet.

  The absorbent body of the disposable diaper has at least one absorbent layer. At least one absorption layer constituting the absorbent body may contain only a water absorbent resin powder as a water absorbent material, or may contain a fiber substrate in addition to the water absorbent resin powder. The absorbent layer containing only the water absorbent resin powder as the water absorbent material can be thinned. An absorbent layer containing a fiber base material as a water-absorbing material is excellent in dispersibility of body fluids.

  The water absorbent resin powder is not particularly limited, and a known water absorbent resin powder used for water absorbent articles can be used. As the water-absorbent resin powder, for example, it is preferable to use a cross-linked polymer containing acrylic acid as a main constituent, in which at least a part of the carboxyl group is neutralized. The content of the acrylic acid component constituting the crosslinked polymer is preferably 90% by mass or more, more preferably 95% by mass or more, further preferably 97% by mass or more, and more preferably 99% by mass or less. If the content rate of an acrylic acid component exists in the said range, the water-absorbing-resin powder obtained will become easy to express desired absorption performance.

  The cation that neutralizes at least a part of the carboxyl group of the crosslinked polymer is not particularly limited, and examples thereof include alkali metal ions such as lithium, sodium, and potassium, and alkaline earth metal ions such as magnesium and calcium. be able to. Among these, it is preferable that at least a part of the carboxyl groups of the crosslinked polymer is neutralized with sodium ions. The neutralization of the carboxyl group of the cross-linked polymer may be performed by neutralizing the carboxyl group of the cross-linked polymer obtained by polymerization, or the cross-linked polymer using a previously neutralized monomer. May be formed.

The degree of neutralization of the carboxyl group of the crosslinked polymer is preferably 60 mol% or more, more preferably 65 mol% or more. This is because if the degree of neutralization is too low, the absorption performance of the resulting water-absorbent resin powder may deteriorate. The upper limit of the degree of neutralization is not particularly limited, and all of the carboxyl groups may be neutralized. In addition, a neutralization degree is calculated | required by a following formula.
Degree of neutralization (mol%) = 100 × “number of moles of carboxyl groups neutralized in crosslinked polymer” / “total number of moles of carboxyl groups in crosslinked polymer (including neutralized and unneutralized)”

  The shape of the water-absorbent resin powder is not particularly limited, and examples thereof include an irregularly crushed shape, a flake shape, a pearl shape, and a rice grain shape. Among these, from the viewpoint of good entanglement with the fiber base material for use in paper diapers and the like and no fear of dropping off from the fiber base material, an irregular crushed shape is preferable.

  Examples of the fiber base material include defibrated pulp fibers and heat-bonded fibers. Examples of the defibrated pulp fiber include known pulp fibers. The heat-fusible fiber is used for improving shape retention. Specific examples of the heat-sealing fiber include polyolefin fibers such as polyethylene and polypropylene, polyester fibers, and composite fibers. The absorbent layer is, for example, a mixture of a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber mixed with a granular water-absorbent resin powder, and a coated sheet such as a paper sheet such as tissue paper or a liquid-permeable nonwoven sheet. And is formed into a predetermined shape such as a rectangle, an hourglass shape, a gourd shape, a battledore shape.

  The disposable diaper is composed of a front abdomen, a back part, and a crotch part located between them, and the front abdomen and the back part are joined at the side edges so that a waist opening and a pair of leg openings are formed. Either a formed pants type or an unfolded type in which a front abdomen and a back part are bonded with a fastening tape or the like may be used.

  About the name of each part of a disposable diaper, when wearing a diaper, the part applied to the wearer's abdomen is referred to as the front abdomen, the part applied to the wearer's buttocks is referred to as the back part, the front part and the back part A portion located between the two and applied to the wearer's crotch is referred to as a crotch portion. The crotch part is a part located in the middle of the diaper front and back, with the front abdomen and the back part of the pants-type diaper body unfolded and deployed in a flat plane, and is formed into a pants-type It means a portion where both side edges in the diaper width direction are not joined. The diaper front-rear direction means the direction from the front to the back of the disposable pants-type diaper, and the diaper width direction means that the front and back of the pants-type diaper are unfolded and unfolded on a plane. , Which is on the same plane as the pants-type diaper and means a direction orthogonal to the front-rear direction.

  The exterior sheet material is not particularly limited as long as it has high air permeability and low moisture permeability as described above. The configuration of the exterior sheet material may be a single layer structure sheet or a multilayer structure sheet obtained by laminating a plurality of sheet materials. As another sheet material that can be used as the exterior sheet material, a non-woven sheet may be superimposed on the outer surface side of the highly air permeable and low moisture permeable sheet. The nonwoven fabric sheet is joined to the highly breathable / low moisture permeable sheet by an adhesive (for example, hot melt adhesive). As a raw material of the nonwoven fabric sheet, it is preferable to use a spunbond nonwoven fabric, a point bond nonwoven fabric, an SMS nonwoven fabric, or an air-through nonwoven fabric. However, the material is not limited to this, and any nonwoven fabric can be used.

  The disposable diaper is preferably provided with a waist elastic member along the waist opening edge of the front or back part. The waist elastic member makes it difficult for leakage of excrement such as urine from the back side or the abdomen side even when the wearer is sleeping. A plurality of waist elastic members may be provided.

  The disposable diaper is preferably provided with a leg elastic member along the leg opening edge. Leakage of excrement such as urine from the leg opening edge is prevented by the leg elastic member. In addition, a leg opening edge means the edge around the leg opening part of a diaper main body. A plurality of leg elastic members may be provided.

  The disposable diaper is preferably provided with a plurality of waist elastic members in the front side and / or back part in the diaper body width direction. The fit around the lower abdomen and the buttocks of the diaper is improved by the elastic member for the waist.

  Each elastic member can be an elastic stretchable material that is normally used for disposable diapers such as polyurethane yarns, polyurethane films, and natural rubber. Each elastic member is preferably fixed to the exterior sheet material and / or the surface sheet material with a hot melt adhesive in an extended state. As the hot melt adhesive, a rubber-based hot melt adhesive is preferable.

  On the skin surface side of the disposable diaper, a surface sheet material that is at least partially permeable is disposed. The surface sheet material of the disposable diaper is, for example, a top sheet made of a non-woven material and both sides of the top sheet in the width direction. And a side sheet made of a nonwoven fabric material. It is preferable that the top sheet made of the nonwoven material has liquid permeability, and the side sheet made of the nonwoven material has liquid impermeability.

  The liquid-permeable top sheet that constitutes the surface sheet material of the disposable diaper quickly captures the moisture of the excrement from the wearer, and into the absorbent body disposed between the surface sheet material and the exterior sheet material. Suitable for moving. The liquid-impervious side sheet preferably constitutes a rising flap. The rising flap prevents lateral leakage of urine and the like, and quickly moves the water of excrement to the absorber.

  It is preferable that an elastic member for standing is provided at an end of the rising flap (end on the wearer side). By the contraction force of the elastic member for standing up, it rises on the wearer side, and side leakage of urine or the like is prevented.

  Hereinafter, although the absorbent article of this invention is demonstrated referring drawings, this invention is not limited to the aspect shown by drawing.

  In FIG. 1, an example of the underpants type disposable diaper of this invention is shown (development figure). The pants-type disposable diaper 1 has a front part 3 and a back part 5 in the length direction A, and has a crotch part 7 between the front part 3 and the back part 5. The front abdomen 3 is in contact with the wearer's abdomen, and the back part 5 is in contact with the wearer's buttocks. The crotch portion 7 is provided with a notch 9 along the circumference of the wearer's leg. In the pants-type disposable diaper 1 of FIG. 1, the side edge 3a of the front abdominal part 3 and the side edge 5a of the back part 5 are joined, and it becomes the pants-type disposable diaper 1 which has a waist opening part and a pair of leg opening part.

  The pants-type disposable diaper 1 has an absorbent main body 13 attached to the skin surface side of the exterior sheet material 11. The absorbent main body 13 extends along the length direction A from the center of the crotch portion 7.

  A front waist elastic member 15 and a rear waist elastic member 17 are attached to the pant-type disposable diaper 1 along the edge 12 of the exterior sheet material 11 in a state of being stretched in the width direction B. Further, along the notch 9, the front leg elastic member 19 and the rear leg elastic member 21 are attached in an extended state. A state where the front waistline elastic member 23 and the back waistline elastic member 25 are extended in the width direction B between the waist elastic member and the leg elastic member in each of the front abdominal part 3 and the back back part 5. It is attached with. The disposable diaper 1 fits the wearer by contraction of each elastic member.

  FIG. 2 is a diagram schematically illustrating a cross section taken along line II of the pant-type disposable diaper of FIG. With reference to FIG. 2, the structure of the underpants type disposable diaper 1 is demonstrated. As shown in FIG. 2, the pants-type disposable diaper 1 of the present invention has an exterior sheet material 11 on the outer surface side of the absorbent main body 13 (or the absorbent body 2). The exterior sheet material 11 includes an outer sheet 11a and an inner sheet 11b, and elastic members 15 and 17 for waist, elastic members 19 and 21 for legs, and elastic members 23 and 25 for waistline are stretched between the two sheets. It is attached with. The outer sheet 11a is longer in the length direction than the inner sheet 11b, and is folded back to the inner surface side (skin surface side) at the end edge 12 to form a folded portion 14. In FIG. 2, the right side in the C direction is the outer surface side, and the left side is the inner surface side (skin surface side).

  In this aspect, it is preferable to use a highly air permeable and low moisture permeable sheet as the inner sheet 11 b constituting the exterior sheet material 11.

  The absorbent main body 13 includes a top sheet 27 made of a nonwoven material disposed on the skin surface side of the absorbent body 2 and a liquid-impermeable back sheet 29 provided on the outer surface side of the absorbent body 2. In the pants-type disposable diaper 1, a front end press sheet 31 and a rear end press sheet 33 are provided so as to cover the lengthwise ends of the absorbent main body 13 at the front abdomen 3 and the back part 5 of the inner surface of the inner sheet 11 b. ing. The absorbent body 2 contains a water absorbent resin powder 6 and a fiber base material 8.

  FIG. 3 is a diagram schematically illustrating a cross section taken along line II-II of the pants-type disposable diaper of FIG. As shown in FIG. 3, a side sheet 35 made of a non-woven material is joined to the upper part of both side edges in the width direction of the top sheet 27 made of the non-woven material. The side seat 35 forms a rising flap that stands up toward the wearer's skin by the contraction force of the elastic member 37 attached in a stretched state in the length direction, and serves as a barrier that prevents lateral leakage of urine and the like. . In FIG. 3, the upper side in the C direction is the skin surface side, and the lower side is the outer surface side.

  FIG. 4 is a schematic cross-sectional view illustrating another preferred embodiment of the disposable diaper. The disposable diaper 1 includes a liquid-permeable top sheet 27, a liquid-impervious back sheet 29, and the absorbent body 2 between the liquid-permeable top sheet 27 and the liquid-impervious back sheet 29. A liquid-impervious side sheet 35 is joined to the upper part of both side edges of the liquid-permeable top sheet 27. The side sheets inward from the joining point 34 form a rising flap that stands up toward the wearer's skin. The side sheet outside the bonding point 34 extends outward from the side edge of the absorbent body 2 and is bonded to the back sheet 29. The top sheet material includes a liquid-permeable top sheet 27 and a liquid-impermeable side sheet 35. The exterior sheet material is a liquid-impervious back sheet 29, and as the liquid-impervious back sheet 29, a highly breathable / low moisture-permeable sheet is used.

  Specific examples of the absorbent article of the present invention include disposable diapers, sanitary napkins, incontinence pads, breast milk pads and the like. As an absorptive article of the present invention, a disposable diaper is preferred and a pants type disposable diaper is more preferred.

  Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited to the following examples, and all modifications and embodiments without departing from the gist of the present invention are not limited thereto. Included in range.

[Air permeability resistance]
According to JIS P8177, it was measured with a fully automatic paper physical property measuring device manufactured by Kumagai Riki Kogyo Co., Ltd.
Measurement sample: 50mm x 120mm
Measurement sample weight: 18 g / m ²

[Moisture permeability]
The measurement of moisture permeability was performed by the moisture permeability test method (cup method) of moisture-proof packaging material according to JIS-0208.
Measurement sample weight: 18 g / m ²
Measurement temperature: 40 ° C ± 2 ° C
Measurement humidity: 90% ± 5%

[Preparation of exterior sheet material]
After spraying and uniformly applying the aerobic treatment agent to the porous sheet shown in Table 1, it is aged at 60 ° C. × 24 h to obtain an exterior sheet material that is an example of the present invention and an exterior sheet material of a comparative example. It was. Table 1 shows the type and amount of the aerophilic treatment agent, the air permeability of the exterior sheet, and the moisture permeability.

[Production of absorbent articles]
(A) Outer Absorbent Article An outer absorbent article (a diaper outer package) was prepared using an absorbent body obtained by forming pulverized pulp into a sheet shape. As the sheet material constituting the outer absorbent article, the following was used.
(Skin side) Surface sheet material: D-02220 manufactured by Fukusuke Kogyo Co., Ltd.
(Outside surface) Exterior sheet material: CFY6020A2A manufactured by Mitsubishi Plastics
(I) Inner absorbent article Using the absorbent body formed by mixing a crushed water absorbent resin powder (Sunwet IM-930 manufactured by Sundia Polymer Co., Ltd.) and pulverized pulp in a ratio of 1: 2, An inner absorbent article (pad type paper diaper) was produced. The following were used as the sheet material constituting the inner absorbent article.
Skin side sheet material: TA-LSW-18-205-6500, manufactured by Fukusuke Kogyo Co., Ltd.
Outer sheet material: exterior sheet materials of Examples 1 to 4 and Comparative Examples 1 to 3 described in Table 1

[Dew condensation monitor test]
FIG. 5 is an explanatory view showing an outline of a dew condensation monitor test. The inner absorbent article (absorption pad) 50 was placed inside the outer absorbent article 51, and 300 mL of physiological saline 80 was absorbed into the inner absorbent article (absorption pad) 50. The outer absorbent article 51 was folded in half so that the vapor did not go out of the outer absorbent article 51, and the end portion of the outer absorbent article 51 was sealed with the tape 81. After storing for 4 hours in an environment of 37 ° C., the inner absorbent article (absorbent pad) 50 was taken out. Sensory evaluation was performed about the dryness of the absorber surface of the outer absorbent article placed in the environment. Twenty adult monitors were brought into contact with the surface of the absorber, and the degree of wetness on the surface was determined by a 5-point scale of 1 to 5 shown below. The results are shown in Table 1.

<Score>
1: dry 2: slightly wet but dry 3: feels slightly wet 4: feels wet 5: feels wet enough to touch

[Moisture test]
The inner absorbent article (absorption pad) 50 was placed inside the outer absorbent article 51, and 300 mL of physiological saline 80 was absorbed into the inner absorbent article (absorption pad) 50. The above-mentioned absorbent article was worn on 20 adult monitors, and the degree of stuffiness felt on the skin surface was determined by a 5-level rating of 1 to 5 shown below. The results are shown in Table 1.

<Score>
1: No stuffiness 2: Slightly moist but no stuffiness 3: Feels stuffiness 4: Feels stuffiness 5: There is so much liquid on the skin that it feels very stuffy

Porous sheet 1: Tokuyama BF PM-18-310-6200G SARA-B
Porous sheet 2: BFBS PN-35-220-4000-1G-YAWA-R manufactured by Tokuyama Corporation
Porous sheet 3: CFY4537D6A manufactured by Mitsubishi Plastics
Pro-air treatment agent 1: Shin-Etsu Chemical Co., Ltd. KF-945 (polyether-modified polysiloxane)
Aerophilic treatment agent 2: Shin-Etsu Chemical Co., Ltd. X-22-3701E (carboxy-modified polysiloxane)

As is clear from Table 1, the inner absorbent articles of Examples 1 to 4 exhibit superior dew condensation prevention performance and anti-steaming performance as compared with the inner absorbent articles of Comparative Examples 1 to 3. This is because the outer sheet material of the absorber has physical properties that the air permeability resistance is 240 (sec / 100 cc) or less and the moisture permeability is 3400 (g / m ² · 24 Hr) or less. It is considered that excellent anti-condensation performance and anti-steaming performance are exhibited because water is selectively aerated without passing through the sheet that has escaped from the interior of the functional article. On the other hand, the inner absorbent articles of Comparative Examples 1 to 3 show inferior results compared to the inner absorbent article of the present invention.

  INDUSTRIAL APPLICATION This invention can be utilized suitably as an absorbent article which absorbs the bodily fluid discharged | emitted from a human body. The present invention can be suitably used as a disposable diaper. For example, the present invention can be suitably used as an outer absorbent article and an absorbent article in which an inner absorbent article is attached to an outer absorbent article.

1: Absorbent article, 2: Absorber, 3: Front part, 5: Back part, 6: Water absorbent resin powder, 7: Crotch part, 8: Fiber base material, 9: Notch, 11: Exterior sheet material, 12: edge, 13: water-absorbing body, 15: front waist elastic member, 17: rear waist elastic member, 19: front leg elastic member, 21: rear leg elastic member, 23: front waist circumference 25: elastic member for rear waist, 27: liquid-permeable top sheet, 29: liquid-impervious back sheet, 31: front end pressing sheet, 33: rear end pressing sheet, 34: joint , 35: side sheet, 37: elastic member, 51: outer absorbent article, 50: inner absorbent article

Claims (8)

An absorbent article having an absorbent body and an exterior sheet material on the outer surface side of the absorbent body, wherein the exterior sheet material has an air permeability resistance of 240 (seconds / 100 cc) or less, and a moisture permeability of 3400. Absorbent article characterized by being (g / m ² · 24Hr) or less.   The said exterior sheet | seat material is obtained by apply | coating the aerobic treatment agent which has a site | part of SP value lower than SP value (solubility parameter) of water on the surface of a porous sheet. Absorbent articles.   The absorbent article according to claim 2, wherein the porous sheet is obtained by forming a resin composition for a sheet in which a filler is blended into a thermoplastic resin into a sheet shape and then stretching the sheet.   The exterior sheet material is obtained by treating the surface of the filler with an aerobic treatment agent having an SP value lower than the SP value of water (solubility parameter), and blending the obtained filler into a thermoplastic resin. The absorbent article according to claim 1, which is obtained by forming a resin composition for a sheet into a sheet and then stretching the resin composition.   The absorbent article according to claim 3 or 4, wherein the aerobic treatment agent is a compound having a portion having an SP value lower than an SP value of the thermoplastic resin.   The absorbent article according to any one of claims 3 to 5, wherein the thermoplastic resin is a polyolefin.   The absorbent article according to any one of claims 2 to 6, wherein the aerobic treatment agent is a compound having an SP value (solubility parameter) of 6 to 7.5.   The absorbent article according to any one of claims 1 to 7, which is an unfolded or pants-type disposable diaper.

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