Acrylic fiber for artificial hair, crimped acrylic fiber for artificial hair, hair ornament product including the same, and production method therefor

Abstract

The present invention relates to an acrylic fiber for artificial hair containing an acrylic copolymer. The dry-heat shrinkage ratio of the acrylic fiber after dry-heat treatment at 90 to 180° C. for 30 minutes is 30 to 70%, and the torsional rigidity thereof is 0.3 to 2.0 mg·cm 2 . Also, one or more embodiments of the present invention relate to a crimped acrylic fiber for artificial hair containing an acrylic copolymer. In the crimped acrylic fiber, the number of crimps is 10 or more crimps per 10 cm, and the crimp height is 1.5 mm or more. In addition, in ten continuous crimps, at least two crimps differ in crimp width and at least two crimps differ in crimp height, while the crimps are formed in two or more different crimp directions.

1 . An acrylic fiber for artificial hair comprising an acrylic copolymer,
 wherein a dry-heat shrinkage ratio of the acrylic fiber for artificial hair after dry-heat treatment at a temperature of 90° C. or higher and 180° C. or lower for 30 minutes is 30% or more and 70% or less, and   a torsional rigidity of the acrylic fiber for artificial hair is 0.3 mg·cm 2  or more and 2.0 mg·cm 2  or less.   
     
     
         2 . The acrylic fiber for artificial hair according to  claim 1 ,
 having one or more cross-sectional shapes selected from the group consisting of an anchor-like-Y-shape, a C-shape, and a figure-6 shape.   
     
     
         3 . The acrylic fiber for artificial hair according to  claim 1 ,
 wherein a single fiber fineness of the acrylic fiber for artificial hair is 25 dtex or more and 95 dtex or less.   
     
     
         4 . The acrylic fiber for artificial hair according to  claim 1 ,
 wherein a fiber cross-section of the acrylic fiber for artificial hair has a hollow ratio of 20% or more and 50% or less.   
     
     
         5 - 8 . (canceled) 
     
     
         9 . A hair ornament product comprising the acrylic fiber for artificial hair according to  claim 1 . 
     
     
         10 . The hair ornament product according to  claim 9 ,
 which is at least one selected from the group consisting of a fiber bundle for hair, weaving hair, a wig, a braid, a toupee, a hair extension, and a hair accessory.   
     
     
         11 . A method for producing the acrylic fiber for artificial hair according to  claim 1 , comprising:
 a coagulation process for obtaining coagulated filaments by subjecting a spinning solution containing an acrylic copolymer to wet spinning using a spinning nozzle;   a primary drawing process for subjecting the obtained coagulated filaments to wet drawing; and   a secondary drawing process for subjecting obtained primary drawn filaments to dry drawing,   wherein a relaxation treatment is not performed after the secondary drawing process.   
     
     
         12 . (canceled) 
     
     
         13 . The hair ornament product according to  claim 9 ,
 wherein the acrylic fiber for artificial hair has one or more cross-sectional shapes selected from the group consisting of an anchor-like-Y-shape, a C-shape, and a figure-6-shape.   
     
     
         14 . The hair ornament product according to  claim 9 ,
 wherein a single fiber fineness of the acrylic fiber for artificial hair is 25 dtex or more and 95 dtex or less.   
     
     
         15 . The hair ornament product according to  claim 9 ,
 wherein a fiber cross-section of the acrylic fiber for artificial hair has a hollow ratio of 20% or more and 50% or less.   
     
     
         16 . The method for producing the acrylic fiber for artificial hair according to  claim 11 ,
 wherein the acrylic fiber for artificial hair has one or more cross-sectional shapes selected from the group consisting of an anchor-like-Y-shape, a C-shape, and a figure-6-shape.   
     
     
         17 . The method for producing the acrylic fiber for artificial hair according to  claim 11 ,
 wherein a single fiber fineness of the acrylic fiber for artificial hair is 25 dtex or more and 95 dtex or less.   
     
     
         18 . The method for producing the acrylic fiber for artificial hair according to  claim 11 ,
 wherein a fiber cross-section of the acrylic fiber for artificial hair has a hollow ratio of 20% or more and 50% or less.