Artificial Hair, Wig Using the Same, and Method of Making Artificial Hair

Abstract

An artificial hair bundle ( 10 ) is made up by mixing a first artificial hair made of a polyester resin ( 1, 2 ) and a second artificial hair made of a polyamide resin ( 5, 6 ), and the first artificial hair ( 1, 2 ) is made of polyethylene terephthalate and polybutylene terephthalate, having a cross-sectional size and bending rigidity similar to those of natural hair, wherein the bending rigidity is in the range of about 6.5 to 7.8×10 −3 gf·cm 2 /strand at humidity 40%, and the first artificial hair ( 1, 2 ) suppresses bundling of the second artificial hair ( 5, 6 ), and the first and the second artificial hairs ( 1, 2, 5, 6 ) behave similarly to natural hair.

1 . An artificial hair, characterized in that:
 it is made of a fiber including polyethylene terephthalate, and has bending rigidity similar to that of natural hair.   
     
     
         2 . An artificial hair, characterized in that:
 it is made of a fiber including polyethylene terephthalate, and has bending rigidity similar to that of natural hair by having a cross-sectional size similar to that of natural hair.   
     
     
         3 . The artificial hair as set forth in  claim 1  or  2 , characterized in that:
 it has a cross-sectional size perpendicular to the length direction of said fiber in the range of 50 to 70 μm as an average diameter.   
     
     
         4 . An artificial hair, characterized in that:
 it is made of a fiber including polyethylene terephthalate and polybutylene terephthalate, and has bending rigidity similar to that of natural hair.   
     
     
         5 . The artificial hair as set forth in  claim 4 , characterized in that:
 it has a cross-sectional size perpendicular to the length direction of said fiber in the range of 50 to 100 μm as an average diameter.   
     
     
         6 . The artificial hair as set forth in  claim 1 ,  2 , or  4 , characterized in that:
 said fiber has bending rigidity in the range of 6.5 to 7.8×10 −3  gfcm 2 /strand at 40% humidity.   
     
     
         7 . The artificial hair as set forth in  claim 1 ,  2 , or  4 , characterized in that:
 fine pores are formed in the length direction on the surface of said fiber.   
     
     
         8 . An artificial hair bundle, characterized in that:
 it is made up to a bundle by dispersing a first artificial hair made of a polyester resin in a second artificial hair made of a polyamide resin in the pre-determined ratio,   said polyester resin includes polyethylene terephthalate, and said first artificial hair has a cross-sectional size and bending rigidity similar to those of natural hair.   
     
     
         9 . An artificial hair bundle, characterized in that:
 it is made up to a bundle by dispersing a first artificial hair made of a polyester resin in a second artificial hair made of a polyamide resin in the pre-determined ratio,   said polyester resin includes polyethylene terephthalate and polybutylene terephthalate, and said first artificial hair has bending rigidity similar to that of natural hair.   
     
     
         10 . The artificial hair bundle as set forth in  claim 8  or  9 , characterized in that:
 said second artificial hair has a sheath/core structure comprising a core portion and a sheath portion covering said core portion, said core portion is made of a polyamide resin, and said sheath portion is made of a polyamide resin of the bending rigidity lower than that of said core portion.   
     
     
         11 . The artificial hair bundle as set forth in  claim 8  or  9 , characterized in that:
 said second artificial hair has a cross-sectional size and bending rigidity similar to those of natural hair.   
     
     
         12 . The artificial hair bundle as set forth in  claim 8  or  9 , characterized in that:
 said bending rigidity is in the range of 6.5 to 7.8×10 −3  gfcm 2 /strand at 40% humidity.   
     
     
         13 . The artificial hair bundle as set forth in  claim 8  or  9 , characterized in that:
 the cross-sectional size perpendicular to the length direction of said first artificial hair is in the range of 50 to 70 μm as an average diameter.   
     
     
         14 . A wig comprising a wig base and artificial hair attached to said wig base, characterized in that:
 a first artificial hair made of a polyester resin and a second artificial hair made of a polyamide resin are used as said artificial hair, said polyester resin includes polyethylene terephthalate, and said first artificial hair has bending rigidity similar to that of natural hair by having a cross-sectional size similar to that of natural hair.   
     
     
         15 . A wig comprising a wig base and artificial hair attached to said wig base, characterized in that:
 a first artificial hair made of a polyester resin and a second artificial hair made of a polyamide resin are used as said artificial hair, said polyester resin includes polyethylene terephthalate and polybutylene terephthalate, and said first artificial hair has bending rigidity similar to that of natural hair.   
     
     
         16 . The wig as set forth in  claim 14  or  15 , characterized in that:
 said second artificial hair has a sheath/core structure comprising a core portion and a sheath portion covering said core portion, said core portion is made of a polyamide resin, and said sheath portion is made of a polyamide resin of the bending rigidity lower than that of said core portion.   
     
     
         17 . A method of making artificial hair having a cross-sectional size and bending rigidity similar to those of natural hair, characterized in that:
 said method is comprises of   a first step to add a coloring material to the polyethylene terephthalate as a starting material, and to melt and discharge,   a second step to solidify the discharged fiber-shaped melt, and   a third step to stretch the solidified fiber-shaped material to the pre-determined diameter.   
     
     
         18 . A method of making artificial hair having bending rigidity similar to that of natural hair, characterized in that:
 said method is comprised of   a first step to melt and discharge the polyethylene terephthalate and polybutylene terephthalate as starting materials and a coloring material in the pre-determined mass ratio,   a second step to solidify the discharged fiber-shaped melt, and   a third step to stretch the solidified fiber-shaped material to the pre-determined diameter.   
     
     
         19 . The method of making artificial hair as set forth in  claim 17  or  18 , characterized in that:
 in either of said second or third step, fine pores are formed on the surface of artificial hair by an alkali denier reduction treatment.