Artificial hair and wig using the same

Abstract

An artificial hair and a wig using the same are provided which have such feeling as appearance, tactile and texture and preferable physical properties similar to natural hair, wherein an artificial hair 1 has a sheath and core structure comprising a core portion 1 B and a sheath portion 1 A covering said core portion 1 B, and by making the core portion 1 B of a polyamide resin, especially a semi-aromatic polyamide resin, and the sheath portion 1 A of a polyamide resin having a rigidity for bending lower than the core portion 1 B, especially a linear saturated aliphatic polyamide resin, the rigidity for bending, for example, can be made to have a value close to that of natural hair, and further its variation behavior depending upon humidity can be controlled quite similar to natural hair, thereby the wig made of it as a material has natural feeling, so that the wig having an excellent appearance can be offered.

1 . An artificial hair having a sheath and core structure comprising a core portion and a sheath portion covering said core portion, characterized in that:
 said core portion is made of a polyamide resin, and said sheath portion is made of a polyamide resin having lower rigidity for bending than said core portion.   
     
     
         2 . The artificial hair as set forth in  claim 1 , characterized in that the surface of said artificial hair is deglossed by having a fine concave and convex portion. 
     
     
         3 . The artificial hair as set forth in  claim 2 , characterized in that said fine concave and convex portion is formed by spherocrystal and/or blast processing. 
     
     
         4 . The artificial hair as set forth in  claim 1 , characterized in that said core portion is made of a semi-aromatic polyamide resin, and said sheath portion is made of a linear saturated aliphatic polyamide resin. 
     
     
         5 . The artificial hair as set forth in  claim 4 , characterized in that said semi-aromatic polyamide resin is an alternating copolymer of hexamethylenediamine and terephthalic acid, or an alternating copolymer of metaxylylene diamine and adipic acid. 
     
     
         6 . The artificial hair as set forth in  claim 4 , characterized in that said linear saturated aliphatic polyamide resin is a caprolactam ring-opening polymer, and/or an alternating copolymer of hexamethylene-diamine and adipic acid. 
     
     
         7 . The artificial hair as set forth in  claim 1 , characterized in that the sheath and core weight ratio of said sheath and said core portions is 10/90-35/65. 
     
     
         8 . The artificial hair as set forth in  claim 1 , characterized in that said artificial hair contains pigment and/or dye. 
     
     
         9 . A wig comprising a wig base and artificial hair attached to said wig base, characterized in that:
 said artificial hair has a sheath and 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 having lower rigidity for bending than said core portion.   
     
     
         10 . The wig as set forth in  claim 9 , characterized in that the surface of said artificial hair is deglossed by having a fine concave and convex portion. 
     
     
         11 . The wig as set forth in  claim 10 , characterized in that said fine concave and convex portion is formed by spherocrystal and/or blast processing. 
     
     
         12 . The wig as set forth in  claim 9 , characterized in that said core portion is made of a semi-aromatic polyamide resin, and said sheath portion is made of a linear saturated aliphatic polyamide resin. 
     
     
         13 . The wig as set forth in  claim 12 , characterized in that said semi-aromatic polyamide resin is an alternating copolymer of hexamethylenediamine and terephthalic acid, or an alternating copolymer of metaxylylene diamine and adipic acid. 
     
     
         14 . The wig as set forth in  claim 12 , characterized in that said linear saturated aliphatic polyamide resin is a caprolactam ring-opening polymer, and/or an alternating copolymer of hexamethylene-diamine and adipic acid. 
     
     
         15 . The wig as set forth in  claim 9 , characterized in that the sheath and core weight ratio of said sheath and said core portions is 10/90-35/65. 
     
     
         16 . The wig as set forth in  claim 9 , characterized in that said artificial hair contains pigment and/or dye.