POLYESTER FILM FOR OPTICAL USE

摘要

PURPOSE: An optical polyester film comprises a water-dispersed oxazoline in which a primer layer is water-dispersed as a cross-linking agent, thereby improving durability and moisture proofness, and to have excellent adhesion between a polyester substrate layer and the primer layer even in high temperature and high humidity condition at post process. CONSTITUTION: An optical polyester film comprises a primer layer laminated on one side or both sides of a polyester substrate layer. The primer layer consists of water-dispersible coating solution. The water-dispersible coating solution comprises: one or more resin selected from a group consisting of urethane resin, acrylic resin, polyester copolymer resin, and heat-reactive water-soluble polyisocyanate resin; a water-dispersed oxazoline; and a silica particle, or alumina-silica composite oxide particle. The comprised amount of the water-water-dispersed oxazoline in the water-dispersible coating solution is 1-30 weight%.