TRANSPARENT POLYIMIDE FILM AND METHOD FOR PREPARING THE SAME

摘要

PURPOSE: A manufacturing method of a transparent polyimide film is provided to provide a polyimide film with improved tensile strength together with excellent optical property and transparence by using a monomer or an improver for tear strength. CONSTITUTION: A manufacturing method of a transparent polyimide film comprises: a step of manufacturing polyamic acid by copolymerizing aromatic dianhydride, and aromatic diamine; a step of imidization by casting the polyamic acid to a supporter. The manufacturing method of the transparent polyimide film comprises a step of putting additives for improving tear strength in before or after polymerization of the polyamic acid, or comprises a step of putting a monomer comprising a functional group selected from a group consisting of a hexafluoro group, a sulfone group, and an oxy group before copolymerization of the polyamic acid.