METHOD FOR PRODUCING POLYESTER FIBER, POLYESTER FIBER, YARN AND TEXTILE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a polyester fiber excellent in a dyeing degree and color fastness, in which, for improving the defect that a polyester fiber and its textile are hard to be dyed, the fiber is dyed under ordinary pressure and also at 100°C or lower using a dispersible dye without adding a dye carrier, and to provide the textile.SOLUTION: Provided is a method in which a composition made of the first polyester component with a glass transition temperature (Tg) of above 20°C to 100°C of 99.9 to 60 wt.% and the second polyester component with a glass transition temperature (Tg) of 20 to -50°C by 0.1 to 40 wt.% is melted into the one having an intrinsic viscosity of 0.5 to 1.5(dl/g), and fusion spinning is performed. Also provided is a textile using the fiber.