STRETCHED POLYESTER-AMIDE FILM AND PROCESS FOR PRODUCING THE SAME

摘要

A stretched polyester-amide film made of a polyester-amide copolymer comprising polyamide units and polyester units in the molecular chain. In dynamic viscoelastometry, the stretched film has a main dispersion peak at a temperature higher by at least 10 DEG C than the main dispersion peak temperature for a nonoriented object made of the polyester-amide copolymer. The stretched film has biodegradability and is excellent in mechanical strength and heat resistance. It can be produced by the inflation stretching method.