Patent ID: 6897303

Claim:
A process for producing a cellulose acylate film, comprising the steps of: dissolving cellulose acylate in a mixed solvent comprising a main solvent and an alcohol to prepare a solution, wherein the mixed solvent essentially does not contain chlorine atom, wherein the main solvent comprises an ester and a ketone, said ester having a solubility parameter of 16 to 23, said ketone having a solubility parameter of 16 to 23, and said alcohol having a solubility parameter of 20 to 30, and wherein the mixed solvent comprises the ester in an amount of 58 to 96 wt. %, the ketone in an amount of 2 to 15 wt. %, and the alcohol in an amount of 2 to 40 wt. %; and forming the film from the prepared solution.