METHOD FOR MAKING THERMOPLASTIC POLYESTER HOLLOW ARTICLES

摘要

The invention offers producing method for polyester resin hollow fiber form through heat treatment of preliminary hollow fiber form under inactive gas having reduced acetaldehyde noxious to human body. Using polyethylene terephtalate resin which has terephtalic acid as main repetition unit characteristic of dicarbamic acid ingredient and limiting viscosity 0.8g, and ethylene glycol as main repetition unit characteristic of dihydroxy compound ingredient, produce preliminary hollow fiber form under 290deg C. Next produce final hollow fiber through 20 minute heat treatment under 200deg C nitrogen gas.