METHOD FOR PRODUCING POLYESTER FIBER

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a polyester fiber having excellent drawability by excellent spinnability and reduced energy consumption. SOLUTION: A flat polyester yarn is produced by radiating a laser beam having an energy density of≥20 W/cm2against a moving resin strand formed by the melt-spinning of a polyester at a position within 15 cm from the face of a spinneret along the spinning line. COPYRIGHT: (C)2005,JPO&NCIPI