PRODUCTION METHOD OF OPTICAL FILM, AND OPTICAL FILM

摘要

PROBLEM TO BE SOLVED: To provide a film production method which is capable of suppressing occurrence of flow mark which could cause degradation of an optical film surface in producing the optical film from an acrylic resin composition containing rubber-like polymer by a melt-extrusion method.SOLUTION: There is provided a production method of an optical film which is made from a thermoplastic resin composition containing rubber particles, a SP (Solubility Parameter) value differenceΔσbetween a resin composing the rubber particles and the thermoplastic resin which are contained in the thermoplastic resin composition is 0.01 or more, the thermoplastic resin composition is stayed inside an equipped polymer filter after the thermoplastic resin composition passes through an extruder.