Patent ID: 8597726

Claim:
A method for producing an optical film, comprising: applying a hardcoat layer forming coating composition onto a film support formed from a thermoplastic resin composition by a method selected from the group consisting of a dip coating method, air knife coating method, a curtain coating method, a roller coating method, a wire bar coating method, a gravure coating method, an extrusion coating method and a microgravure coating method; and curing the applied coating composition by transferring the film support, onto which the coating composition is applied, to pass through a curing zone at which the applied coating composition is cured by ionization radiation to form a hardcoat layer, wherein the thermoplastic resin composition contains a polymer having a lactone ring unit or a glutaric anhydride unit, and the hardcoat layer forming coating composition contains at least the following components (a), (b) and (c) and contains substantially no organic solvent, in which the hardcoat layer forming coating composition contains the component (c) in an amount of from 30 to 2,000 parts by mass per 100 parts by mass of the component (a): (a) a curable compound having three or more (meth)acryloyl groups within one molecule, (b) a polymerization initiator, and (c) a diluent having two (meth)acryloyl groups within one molecule.