Patent ID: 9493891
Filing Date: 2016-11-15
CPC Classification: C08G,D01D,D01F,D01G,D02G,D02J,Y10T

Claim Text:
1. A method for producing an undrawn polyglycolic acid resin yarn, comprising: a discharge step of discharging a molten polyglycolic acid homopolymer through a spinneret, to thereby form a fibrous polyglycolic acid homopolymer; a keeping step of keeping the fibrous polyglycolic acid homopolymer for 0.0012 seconds or more after the discharge in an atmosphere having a temperature of not lower than 110.5° C. but not higher than 220° C. which is a melting point of the polyglycolic acid homopolymer; and a cooling step of cooling the fibrous polyglycolic acid homopolymer obtained in the keeping step, to thereby obtain an undrawn polyglycolic acid resin yarn.