| abstract |
To provide a thermoplastic resin film, and process for producing the same, which can obtain a film having high optical properties in which the occurrence of residual strain and the exhibition of retardation during film forming are suppressed. A film (12) is produced by extruding melted thermoplastic resins in sheet form through a die (24), and sandwiching the sheet between a pair of rollers (26), (28) configured so that at least one of the rollers is an elastic roller (26) made from metal, to cool and solidify the sheet into the film, the thickness Z of a metal tube (44) constituting an outer shell of the elastic roller (26) being in a range of 0.05 mm<Z<7.0 mm, wherein the sheet is formed as a laminate sheet having two or more layers by using two or more of the thermoplastic resins A, B, and in the laminate sheet a glass transition temperature Tg (°C) of the thermoplastic resin B forming an inner layer is 3 to 50°C less than the glass transition temperature Tg (°C) of the thermoplastic resin A forming an outer layer. |