Patent ID: 8771833

Claim:
A laminated polyester film comprising a polyester film, a coating layer formed on at least one surface of the polyester film by applying a coating solution consisting of a urethane resin, an epoxy compound, an oxazoline compound and a melamine compound thereonto, and a prism layer or a micro-lens layer formed directly on the coating layer, wherein a content of the urethane resin in the coating layer is 20 to 90% by weight, a total content of the epoxy compound, the oxazoline compound and the melamine compound in the coating layer is 10 to 80% by weight, and the urethane resin is a self-emulsifiable urethane resin which is ionomerized by introducing a carboxyl group into a skeleton of the urethane resin and is obtained by using a polycarbonate polyol or a polyester polyol as a polyol.