POLYESTER-BASED OPTICAL FILM

摘要

PURPOSE: A polyester-based film is provided to comprise anionic surfactant and non-ionic surfactant on a primer layer, thereby having excellent adhesion with a substrate film after drying high temperature and high humidity condition and easily controlling adhesion with a substrate which has polar surface energy. CONSTITUTION: A polyester-based film comprises a polyester substrate film, and a primer layer formed on one side or double sides of the substrate film. The primer layer comprises a polyurethane based binder resin, an anionic surfactant, a non-ionic surfactant, silica nanoparticles and a hardener. The weight ratio of the anionic surfactant and the non-ionic surfactant is 4:6 - 2:8. The amount of the binder resin is 10.0-95.0 weight% on the basis of total weight of the primer layer.