Biaxially oriented polylactic acid film with improved heat seal properties

摘要

Multi-layer biaxially oriented polylactic acid (BOPLA) film with a novel formulation improves the heat seal initiation temperature and heat seal performance of BOPLA films while maintaining good optical clarity. The film may include a core layer including polylactic acid base polymer resin, and a heat sealable layer including amorphous polylactic acid base polymer and a modifier comprising polycaprolactone or poly(butylene-adipate-co-butylene terephthalate).

主权项

1. A biaxially oriented film comprising:
a core layer consisting essentially of polylactic acid base polymer resin; and a heat sealable layer comprising amorphous polylactic acid base polymer and a modifier comprising polycaprolactone or poly(butylene-adipate-co-butylene terephthalate), wherein the amorphous polylactic acid base polymer has a peak melting point and the film has a heat seal strength of 200-365 g/25 mm at 250° F.