Patent ID: 6887414
Filing Date: 2005-05-03
Classification: D01D,D01F

Abstract:
1. A method for manufacturing polyester fibers, comprising: melting solid phase polymerized polyester chips having an intrinsic viscosity of 1.00 to 1.15 and a moisture regain of 30 ppm or less at 290 to 300° C., spinning the molten polyester through a nozzle and cooling extruded filaments with cooling air, winding the extruded filaments at a rate of 2,000 m/min or more to produce an undrawn yarn, and drawing the undrawn yarn, wherein at least one eddy plate is set at an upper position of a quenching zone below a nozzle, and the undrawn yarn is drawn through three phases at a temperature of glass transition of polyester polymer or lower.