A barrier fabric suitable as a backsheet for an underpad configured for a low air loss bed, in which the barrier fabric comprises a first nonwoven fabric including outermost spunbond layers and two or more fine-fiber containing nonwoven layers. Each of the nonwoven layers being treated with a non-fluorinated barrier coating (NFBC).

Disclosed is a synthetic fiber treatment agent containing a phenol amine compound and a nonionic surfactant. The phenol amine compound is at least one selected from the group consisting of a compound formed from a phenol derivative, formaldehyde, and a polyamine compound and a compound obtained by reacting a boron-containing compound with a compound formed from a phenol derivative, formaldehyde, and a polyamine compound. The phenol derivative is a phenol in which a hydrocarbon group with a number average molecular weight of not less than 100 and not more than 2000 is modified.

Disclosed is an elastic fiber treatment agent that contains a smoothing agent and an alkyl phosphate ester compound. The alkyl phosphate ester compound contains specific phosphate ester Q1 and at least one or more selected from specific phosphate esters Q2 and Q3. In a P nucleus NMR measurement of the alkyl phosphate ester compound upon an alkali over-neutralization pretreatment, a P nucleus NMR integral ratio attributed to the phosphate ester Q1 is 15% to 60% if the sum of P nucleus NMR integral ratios attributed to the phosphate esters Q1 to Q3 and phosphoric acid and its salt is taken as 100%.

A polyacrylonitrile-based artificial hair fiber having excellent water repellency and excellent tactile feel; a method for producing the fiber; and a head decoration product including the fiber are provided. The water-repellent polyacrylonitrile-based artificial hair fiber contains a polyacrylonitrile-based synthetic fiber (A). An alkyl (meth)acrylate-based water repellent (B) adheres to the polyacrylonitrile-based synthetic fiber (A). The alkyl (meth)acrylate-based water repellent (B) does not have a fluoro group. The alkyl (meth)acrylate-based water repellent (B) has a long-chain hydrocarbon side chain. The attached amount of the alkyl (meth)acrylate-based water repellent (B) is 0.03-1.0 mass % with respect to the total mass of the polyacrylonitrile-based synthetic fiber (A).

A polyacrylonitrile-based artificial hair fiber having excellent water repellency and excellent tactile feel; a method for producing the fiber; and a head decoration product including the fiber are provided. The water-repellent polyacrylonitrile-based artificial hair fiber contains a polyacrylonitrile-based synthetic fiber (A). An alkyl (meth)acrylate-based water repellent (B) adheres to the polyacrylonitrile-based synthetic fiber (A). The alkyl (meth)acrylate-based water repellent (B) does not have a fluoro group. The alkyl (meth)acrylate-based water repellent (B) has a long-chain hydrocarbon side chain. The attached amount of the alkyl (meth)acrylate-based water repellent (B) is 0.03-1.0 mass % with respect to the total mass of the polyacrylonitrile-based synthetic fiber (A).

A water-repellent polyacrylonitrile-based synthetic hair fiber contains a polyacrylonitrile-based synthetic fiber (A) and a water repellent (B) attached to the polyacrylonitrile-based synthetic fiber (A). The water repellent (B) does not have a fluoro group and contains at least one selected from the group consisting of a dendrimer-based water repellent (B-1), an alkyl urethane-based water repellent (B-2), and condensation reaction type polydimethylsiloxane (B-3). The dendrimer-based water repellent (B-1) has an ester and/or urethane bond. The alkyl urethane-based water repellent (B-2) has a long-chain hydrocarbon side chain and is non-dendrimer-based. The condensation reaction type polydimethylsiloxane (B-3) has, at both terminals, a hydroxyl group, an organic group having a hydroxyl group, or an organic group capable of generating a hydroxyl group. The amount of the water repellent (B) attached is between 0.05 mass % and 1.0 mass % both inclusive with respect to a total mass of the polyacrylonitrile-based synthetic fiber (A).

A water-repellent polyacrylonitrile-based synthetic hair fiber contains a polyacrylonitrile-based synthetic fiber (A) and a water repellent (B) attached to the polyacrylonitrile-based synthetic fiber (A). The water repellent (B) does not have a fluoro group and contains at least one selected from the group consisting of a dendrimer-based water repellent (B-1), an alkyl urethane-based water repellent (B-2), and condensation reaction type polydimethylsiloxane (B-3). The dendrimer-based water repellent (B-1) has an ester and/or urethane bond. The alkyl urethane-based water repellent (B-2) has a long-chain hydrocarbon side chain and is non-dendrimer-based. The condensation reaction type polydimethylsiloxane (B-3) has, at both terminals, a hydroxyl group, an organic group having a hydroxyl group, or an organic group capable of generating a hydroxyl group. The amount of the water repellent (B) attached is between 0.05 mass % and 1.0 mass % both inclusive with respect to a total mass of the polyacrylonitrile-based synthetic fiber (A).

The sizing agent for synthetic fiber contains an organo-modified silicone represented by the following General Formula (1) and an epoxy compound (B) having an aromatic ring.

##STR00001##

In Formula (1), R.sup.1 represents a hydrogen atom, a methyl group, or an ethyl group, R.sup.2 represents a group having an epoxy group R.sup.3 represents a hydrocarbon group having an aromatic ring and from 8 to 40 carbon atoms or an alkyl group having from 3 to 22 carbon atoms, R.sup.4 represents the same group as R.sup.1, R.sup.2, or R.sup.3, and a plurality of les, R.sup.2s, R.sup.3s, or R.sup.4s may be the same as or different from one another when there are a plurality of les, R.sup.2s, R.sup.3s, or R.sup.4s, x represents an integer of 0 or greater, y and z each represent an integer of 1 or greater, and (x+y+z) is from 10 to 200.

The sizing agent for synthetic fiber contains an organo-modified silicone represented by the following General Formula (1) and an epoxy compound (B) having an aromatic ring.

##STR00001##

In Formula (1), R.sup.1 represents a hydrogen atom, a methyl group, or an ethyl group, R.sup.2 represents a group having an epoxy group R.sup.3 represents a hydrocarbon group having an aromatic ring and from 8 to 40 carbon atoms or an alkyl group having from 3 to 22 carbon atoms, R.sup.4 represents the same group as R.sup.1, R.sup.2, or R.sup.3, and a plurality of les, R.sup.2s, R.sup.3s, or R.sup.4s may be the same as or different from one another when there are a plurality of les, R.sup.2s, R.sup.3s, or R.sup.4s, x represents an integer of 0 or greater, y and z each represent an integer of 1 or greater, and (x+y+z) is from 10 to 200.

Disclosed is a polyester synthetic fiber treatment agent that contains a silicone (A), a silicone (B), a nonionic surfactant, an anionic ingredient, and optionally a silicone (C). The amount of the silicone (C) contained in the polyester synthetic fiber treatment agent is less than 10% by mass. The silicone (A) is a silanol-modified silicone with a number average molecular weight of not less than 50,000 but less than 200,000. The silicone (B) is a silane coupling agent having at least one functional group selected from the group consisting of a methoxy group, an ethoxy group, an amino group, and an isocyanate group but not including an epoxy group in the molecule. The silicone (C) is at least one selected from the group consisting of silicone resins, dimethyl silicones, and alkyl-modified silicones but excluding those corresponding to being the silicone (A).