METHOD FOR PREPARING POLYIMIDE FILM

摘要

PURPOSE: A manufacturing method of a polyimide film is provided to manufacture a polyimide film having excellent optical isotropy, low double-refraction, and transparence through a roll to roll method. CONSTITUTION: A manufacturing method of a polyimide film comprises: a step of dissolving dianhydride component and diamine component into a first solvent, and manufacturing a polyamic acid solution by reacting the solution; a step of imidizing the polyamic acid solution; a step of putting imidized solution into a second solvent, and obtaining polyimide resin solid phase by filtering and drying the outcome; and a step of casting the polyimide solution to a support, and drying the casted polyimide solution.