Fibers for hair, method for producing same, fiber treatment agent and hair accessory

Abstract

A fiber for hair, having a base fiber, and a cationic surfactant and a nonionic surfactant which are present in at least a part of a surface of the base fiber, in which the cationic surfactant has a carbon chain having 18 to 22 carbon atoms, the nonionic surfactant has a carbon chain having 10 to 20 carbon atoms, an HLB value of the nonionic surfactant is 14.0 to 19.0, a content of the cationic surfactant is 3 to 20% by mass based on the total amount of the nonionic surfactant, and a total amount of the cationic surfactant and the nonionic surfactant is 0.002 to 4% by mass based on the total amount of the fiber for hair.

1 . A fiber for hair, comprising: a base fiber; and a cationic surfactant and a nonionic surfactant which are present in at least a part of a surface of the base fiber, wherein
 the cationic surfactant has a carbon chain having 18 to 22 carbon atoms,   the nonionic surfactant has a carbon chain having 10 to 20 carbon atoms,   an HLB value of the nonionic surfactant is 14.0 to 19.0,   a content of the cationic surfactant is 3 to 20% by mass based on a total amount of the nonionic surfactant, and
 a total amount of the cationic surfactant and the nonionic surfactant is 0.002 to 4% by mass based on a total amount of the fiber for hair. 
   
     
     
         2 . The fiber for hair according to  claim 1 , wherein the base fiber contains at least one selected from the group consisting of a homopolymer of vinyl chloride, a vinyl chloride-acrylonitrile copolymer, polyethylene terephthalate, a polyamide-based resin, polypropylene, and an acrylonitrile-styrene copolymer. 
     
     
         3 . The fiber for hair according to  claim 1 , wherein the cationic surfactant includes a quaternary ammonium salt having a cation with a structure represented by General Formula (1) below: 
       
         
           
           
               
               
           
         
         [in Formula (1), R 11  represents a group containing a carbon chain having 18 to 22 carbon atoms, and R 12 , R 13 , and R 14  each independently represent a monovalent group]. 
       
     
     
         4 . The fiber for hair according to  claim 3 , wherein the cationic surfactant includes a quaternary ammonium salt in which R 12  and R 13  are a methyl group in the General Formula (1). 
     
     
         5 . The fiber for hair according to  claim 1 , wherein the nonionic surfactant includes a compound having at least one selected from the group consisting of a structure represented by General Formula (2a) below, a structure represented by General Formula (2b) below, a structure represented by General Formula (2c) below, and a structure represented by General Formula (2d) below: 
       
         
           
           
               
               
           
         
         [in the formula, R 21a , R 21b , R 21c , and R 21d  each independently represent a hydrophobic moiety containing a carbon chain having 10 to 20 carbon atoms, R 22a , R 22b , R 22c , R 23c , and R 22d  each independently represent a hydrophilic moiety, and R 23d  represents a hydrophobic moiety or a hydrophilic moiety]. 
       
     
     
         6 . The fiber for hair according to  claim 1 , wherein the nonionic surfactant includes polyoxyalkylene alkyl ether. 
     
     
         7 . A headdress article comprising the fiber for hair according to  claim 1 . 
     
     
         8 . A fiber treating agent comprising: a cationic surfactant; a nonionic surfactant; and water, wherein
 the cationic surfactant has a carbon chain having 18 to 22 carbon atoms,   the nonionic surfactant has a carbon chain having 10 to 20 carbon atoms,   an HLB value of the nonionic surfactant is 14.0 to 19.0,   a content of the cationic surfactant is 3 to 20% by mass based on the total amount of the nonionic surfactant, and   a total amount of the cationic surfactant and the nonionic surfactant is 0.1 to 40% by mass based on the total amount of the fiber treating agent.   
     
     
         9 . A method for producing a fiber for hair, comprising bringing the fiber treating agent according to  claim 8  into contact with a surface of a base fiber.