METHOD AND APPARATUS FOR PRODUCING RESIN FILM

摘要

Provided are a method and apparatus for producing a resin film which has a concavoconvex surface, in which optical distortion is suppressed and which has little variation. A method for producing a resin film has the following steps: an extrusion step, in which a molten thermoplastic resin is extruded in the form of a film from a die (3), the extruded film-like thermoplastic resin is fed between a first cooling roller (4), the outer peripheral surface of which, excluding the edge parts, has a concavoconvex pattern formed thereon and the outer peripheral surface of the edge parts of the first cooling roller (4) are subjected to mirror finishing, and a pressing means (5) disposed at a prescribed distance from the first cooling roller (4) in such a way that the edge parts of the resin film come into contact with the mirror finished edge parts of the first cooling roller (4); and a cooling and forming step, in which a resin composition is formed into a resin film by pressing the thermoplastic resin onto the first cooling roller (4) by the pressing means (5) so as to cool the thermoplastic resin and transfer the concavoconvex pattern of the first cooling roller (4) to the surface of the thermoplastic resin.