CO-EXTRUDED, HEAT-SEALABLE AND PEELABLE POLYESTER FILM HAVING STRONG PEELABILITY AND PRODUCTION PROCESS THEREOF

摘要

PURPOSE: A co-extruded, heat-sealable and peelable polyester film having a strong peelability and a production process thereof are provided to have an excellent peelability to an amorphous polyethylene terephthalate (APET) tray. CONSTITUTION: The co-extruded, transparent, biaxially oriented polyester film comprises a base layer and a heat-sealable outer layer peelable from APET. The outer layer comprises 80 to 98 wt.% of a polyester and 2 to 10 wt.% of inorganic and/or organic particles, based on a weight of the outer layer. The particles have a mean particle diameter(d50) of 2.5 to 8.0 micrometers. The polyester comprises 12 to 89 mole% of a unit derived from at least one aromatic dicarboxylic acid and 11 to 88 mole% of a unit derived from at least one aliphatic dicarboxylic acid, wherein a sum of the dicarboxylic acids is 100 mole%.