| abstract |
(Problem) When a (meth)acrylic resin or a cycloolefin resin is used as the raw material resin and dissolved in a solvent, dissolution defects such as lumps do not occur and productivity can be increased, and the film is thin and the production speed is increased Provided is a method for producing an optical film that does not cause problems in the surface quality of the produced film, particularly in terms of film thickness non-uniformity, even when the production of (Solution means) A method for producing an optical film containing a predetermined resin, the crushing step of crushing the semi-material generated in the manufacturing step of the optical film to obtain a crushed product having a bulk density of 0.05 to 0.20 g/cm 3 , and the crushed product , a compression step of compressing at a compression ratio of 1.25 to 7 times, a dope preparation step of dissolving a raw material containing the compressed product obtained in the compression step in a solvent to prepare dope, and a support body with the dope obtained in the dope preparation step After casting on the phase, drying and peeling include a step of obtaining a membranous product. |