Antibacterial polyacrylonitrile-based synthetic fiber, method for producing same, and headdress product

Abstract

An antibacterial polyacrylonitrile-based synthetic fiber suitable for synthetic hair that is superior in an antibacterial property and texture, a method for producing the fiber, and a headdress product containing the fiber are provided. The antibacterial polyacrylonitrile-based synthetic fiber contains a quaternary ammonium salt (B) represented by formula (1): and a non-ionic surfactant (C), that are attached to a polyacrylonitrile-based synthetic fiber (A). The non-ionic surfactant (C) contains a sorbitan fatty acid ester (C 1 ) and polyoxyethylene triglyceride (C 2 ). The amount of the quaternary ammonium salt (B) attached is between 0.05 mass % and 0.3 mass % both inclusive with respect to a total mass of the antibacterial polyacrylonitrile-based synthetic fiber. The amount of the non-ionic surfactant (C) attached is between 0.15 mass % and 0.9 mass % both inclusive with respect to the total mass of the antibacterial polyacrylonitrile-based synthetic fiber.

1 . An antibacterial polyacrylonitrile-based synthetic fiber, comprising:
 a polyacrylonitrile-based synthetic fiber (A);   a quaternary ammonium salt (B) represented by following formula (1):   
       
         
           
           
               
               
           
         
         wherein in the formula (1), R 1  is an alkyl group with 8-18 carbon atoms;
 R 2  to R 4  are each independently a methyl group, an alkyl group with 8-18 carbon atoms, a 3-(trihydroxysilyl)propyl group, a 3-(trimethoxysilyl)propyl group or a benzyl group; 
 n is 1 or 2; and 
 x n−  is an inorganic acid ion selected from the group consisting of bromide ions, chloride ions, fluoride ions, hydroxide ions, carbonate ions, sulfate ions, nitrate ions, phosphate ions and borate ions or a monoalkyl phosphate ester ion having an alkyl group with 1-3 carbon atoms or a dialkyl phosphate ester ion having an alkyl group with 1-3 carbon atoms; and 
 
         a non-ionic surfactant (C), 
         wherein the quaternary ammonium salt (B) and the non-ionic surfactant (C) are adhered to the polyacrylonitrile-based synthetic fiber (A), 
         wherein the non-ionic surfactant (C) contains a sorbitan fatty acid ester (C1) and a polyoxyethylene triglyceride (C2), 
         wherein an amount of the quaternary ammonium salt (B) adhered to the polyacrylonitrile-based synthetic fiber (A) is 0.05% by mass or more and 0.3% by mass or less relative to a total mass of the antibacterial polyacrylonitrile-based synthetic fiber, and 
         wherein the amount of the non-ionic surfactant (C) adhered to the polyacrylonitrile-based synthetic fiber (A) is 0.15% by mass or more and 0.9% by mass or less relative to the total mass of the antibacterial polyacrylonitrile-based synthetic fiber. 
       
     
     
         2 . The antibacterial polyacrylonitrile-based synthetic fiber according to  claim 1 , wherein
 R 1  is an alkyl group with 8-18 carbon atoms and R 2  to R 4  are each a methyl group, or R 1  and R 2  are each an alkyl group with 8-18 carbon atoms and R 3  and R 4  are each a methyl group, or R 1  is an alkyl group with 8-18 carbon atoms, R 2  is a 3-(trihydroxysilyl)propyl group and R 3  and R 4  are each a methyl group, or R 1  is an alkyl group with 8-18 carbon 3-atoms, R 2  is a 3-(trimethoxysilyl)propyl group and R 3  and R 4  are each a methyl group;   n is 1; and   X n−  is a chloride ion or a dialkyl phosphate ester ion having an alkyl group with 1-3 carbon atoms.   
     
     
         3 . The antibacterial polyacrylonitrile-based synthetic fiber according to  claim 1 , wherein a content of the sorbitan fatty acid ester (C1) is 20% by mass or more and 90% by mass or less relative to a total mass of the non-ionic surfactant (C). 
     
     
         4 . The antibacterial polyacrylonitrile-based synthetic fiber according to  claim 1 , having a filament fineness of 1 dtex or more and 100 dtex or less. 
     
     
         5 . An artificial hair comprising the antibacterial polyacrylonitrile-based synthetic fiber according to  claim 1 . 
     
     
         6 . A headdress product, comprising the antibacterial polyacrylonitrile-based synthetic fiber according to  claim 1 . 
     
     
         7 . The headdress product according to  claim 6 , wherein the headdress product is one product selected from the group consisting of hair wigs, toupees, weavings, hair extensions, hair braids, hair accessories and doll hair. 
     
     
         8 . A method for producing the antibacterial polyacrylonitrile-based synthetic fiber according to  claim 1 , comprising:
 wet-spinning a spinning an solution containing acrylonitrile polymer to obtain a coagulated yarn; and   bringing a yarn comprising the coagulated yarn into contact with an oil agent containing the quaternary ammonium salt (B) and the non-ionic surfactant (C), before drying the yarn.   
     
     
         9 . A method for producing the antibacterial polyacrylonitrile-based synthetic fiber according to  claim 1 , comprising:
 performing a contact treatment to the dried polyacrylonitrile-based synthetic fiber (A) to obtain a contact-treated polyacrylonitrile-based synthetic fiber (A), wherein in the contact treatment, the dried polyacrylonitrile-based synthetic fiber (A) is brought into contact with an oil agent containing the quaternary ammonium salt (B) and the non-ionic surfactant (C); and   after the performing of the contact treatment, drying a yarn of the contact-treated polyacrylonitrile-based synthetic fiber (A).