METHOD FOR PRODUCING POLYVINYL ALCOHOL FILM, POLYVINYL ALCOHOL FILM, AND POLARIZING FILM

摘要

A method for producing a polyvinyl alcohol film in which an aqueous solution of polyvinyl alcohol resin is cast in a casting mold to make a film, and the film is continuously dried, adhered organic matter being decomposed and the surface being cleaned by irradiating the surface of the casting mold with ultraviolet light. This makes it possible to obtain a polyvinyl alcohol film having a smooth surface and few display defects even without having to maintain a special casting mold.