Method for producing optical film, optical film, polarizer, optical compensatory film, antireflection film and liquid crystal display device

摘要

A method for producing an optical film comprising leading a melt (14) of a composition containing a thermoplastic resin to pass between a first nip-pressing surface (11) and a second nip-pressing surface (12) of a nip-pressing unit whereby the melt is continuously nip-pressed therebetween to form a film, wherein the nip-pressing unit applies a pressure of from 20 to 500 MPa to the melt, and the first nip-pressing surface moves at a higher speed than the second nip-pressing surface.