BIAXIALLY-ORIENTED POLYESTER ADHESIVE FILM WITH COPOLYMERIC POLYESTER RESIN FOR IMPROVING SURFACE LEVELING PROPERTY

摘要

PURPOSE: A biaxially-oriented polyester adhesive film is provided to improve a levering property of a primer layer used for a biaxially oriented polyester film, and to ensure high optical characteristic and winding property. CONSTITUTION: A biaxially-oriented polyester adhesive film with improved surface leveling property comprises: a biaxially oriented polyester substrate film with thickness of 50~300 micron; and a primer layer including a copolymerized polyester resin having carboxyl groups at the terminal, as a polymer adhesive layer. The thickness of the primer layer is 0.10~0.50 micron.