POLYESTER FIBER FOR ARTIFICIAL HAIR, MANUFACTURING METHOD THEREOF, FIBER BUNDLE FOR HAIR CONTAINING POLYESTER FIBER, AND HEAD DECORATION PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a polyester fiber for artificial hair, a fiber having high fire retardancy and superior heat resistance, and a method of manufacturing the same, and to provide a fiber bundle for hair containing the same and a head decoration product.SOLUTION: The polyester fiber for artificial hair of this invention contains a polyester resin and a brominated epoxy-based fire retardant. The polyester resin is a polyalkylene terephthalate and/or a copolyester comprising primarily a polyalkylene terephthalate, and intrinsic viscosity of the polyester resin is 0.3-0.5. A manufacturing method of the polyester fiber for artificial hair includes preferably a process of lowering the intrinsic viscosity of the polyester resin by a sugar alcohol-based and/or bisphenol-based compound which contains two or more hydroxyl groups in the molecule and which has a melting point of 80°C or higher and a boiling point of 260°C or higher.