BIODEGRADABLE POLYESTER ORIENTED FILM AND PREPARATION METHOD THEREOF

摘要

PURPOSE: A biodegradable polyester drawn film and a manufacturing method thereof are provided to maximize flexibility, enhance transparency, and prevent bleed out, thereby being useful as various packages. CONSTITUTION: A biodegradable polyester drawn film is produced by random copolymerization of average molecular weight 500-10,000 of polycaprolactone and/or carprolactone monomer and lactide. A method for manufacturing the biodegradable polyester drawn film comprises the following steps: obtaining a copolymer resin by random copolymerization of the poIycaprolactone and/or the carprolactone monomer and the lactide; obtaining an undrawn sheet by melting and extruding the copolymer resin; and stretching the undrawn sheet vertically or horizontally and heat setting the drawn sheet.