Fiber bundle for artificial hair

Abstract

A fiber bundle for artificial hair includes a plurality of artificial hair fibers. An end surface in a longitudinal direction of each of the plurality of artificial hair fibers is inclined at an angle of 115 degrees or more with respect to the longitudinal direction when viewed from one direction. The end surface in the longitudinal direction is visually recognized when viewed after being further rotated by 90 degrees in the circumferential direction. The smoothness of combing is improved as compared with the conventional fiber bundle for artificial hair.

1 . A fiber bundle for artificial hair comprising a plurality of artificial hair fibers, wherein
 an end surface in a longitudinal direction of each of the plurality of artificial hair fibers is inclined at an angle of 115 degrees or more with respect to the longitudinal direction when viewed from one direction in a circumferential direction, and   the end surface in the longitudinal direction is visually recognized when viewed after being further rotated by 90 degrees in the circumferential direction.   
     
     
         2 . The fiber bundle for artificial hair according to  claim 1 , wherein the end surface in the longitudinal direction of each of the plurality of artificial hair fibers is inclined at an angle of 95 degrees or more with respect to the longitudinal direction when viewed after being rotated by 90 degrees in the circumferential direction with respect to the one direction. 
     
     
         3 . The fiber bundle for artificial hair according to  claim 1 , wherein the end surface in the longitudinal direction of each of the plurality of artificial hair fibers has an average roughness of 1.2 μm or less. 
     
     
         4 . The fiber bundle for artificial hair according to  claim 1 , wherein a ratio of an average roughness of the end surface in the longitudinal direction of each of the plurality of artificial hair fibers to an average roughness of a cross section orthogonal to the longitudinal direction is 350% or less. 
     
     
         5 . The fiber bundle for artificial hair according to  claim 1 , wherein a ratio of a maximum peak height of the end surface in the longitudinal direction of each of the plurality of artificial hair fibers to a maximum peak height of a cross section orthogonal to the longitudinal direction is 140% or less. 
     
     
         6 . The fiber bundle for artificial hair according to  claim 1 , wherein
 a cross section of each of the plurality of artificial hair fibers that is orthogonal to the longitudinal direction, has an outer shape selected from the group consisting of an H shape, a C shape, a circular shape, a Y shape, a U shape, an X shape, a flat shape, and a horseshoe shape, and   the end surface in the longitudinal direction of each of the plurality of artificial hair fibers when viewed in the longitudinal direction is similar to the outer shape of the cross section.   
     
     
         7 . The fiber bundle for artificial hair according to  claim 2 , wherein the end surface in the longitudinal direction of each of the plurality of artificial hair fibers has an average roughness of 1.2 μm or less. 
     
     
         8 . The fiber bundle for artificial hair according to  claim 2 , wherein a ratio of an average roughness of the end surface in the longitudinal direction of each of the plurality of artificial hair fibers to an average roughness of a cross section orthogonal to the longitudinal direction is 350% or less. 
     
     
         9 . The fiber bundle for artificial hair according to  claim 2 , wherein a ratio of a maximum peak height of the end surface in the longitudinal direction of each of the plurality of artificial hair fibers to a maximum peak height of a cross section orthogonal to the longitudinal direction is 140% or less. 
     
     
         10 . The fiber bundle for artificial hair according to  claim 2 , wherein
 a cross section of each of the plurality of artificial hair fibers that is orthogonal to the longitudinal direction, has an outer shape selected from the group consisting of an H shape, a C shape, a circular shape, a Y shape, a U shape, an X shape, a flat shape, and a horseshoe shape, and   the end surface in the longitudinal direction of each of the artificial hair fibers when viewed in the longitudinal direction is similar to the outer shape of the cross section.