METHOD TO PRODUCE A POLY(TRIMETHYLENE TEREPHTHALATE) FILM

摘要

The invention herein provides a method to improve retention of tensile properties upon aging in poly(trimethylene terephthalate) cast film. The method involves first nucleating the poly(trimethylene terephthalate) resin prior to film formation and controlling the quench temperature during casting of the film. The quench temperature should be controlled to a temperature in the range of from about 10 DEG C below the Tg of the poly(trimethylene terephthalate) to about 15 DEG C above the Tg of the poly(trimethylene terephthalate).