METHOD FOR TREATING POLYESTER, POLYESTER OBTAINED THEREBY AND POLYESTER FIBER

摘要

PROBLEM TO BE SOLVED: To provide a polyester generating little amount of a regenerated cyclic dimer at melt molding, enabling the stable production of a fiber by reducing the amount of deposited oligomers at weaving or knitting, and exhibiting excellent properties in quality control in dyeing process. SOLUTION: The method for treating the polyester having a trimethylene terephthalate unit as a main repeating unit involves treating the polyester with an aqueous solution of a surfactant dissolving the oligomers contained in the polyester and substantially not dissolving the polyester to extract and remove the oligomers. COPYRIGHT: (C)2007,JPO&INPIT