Patent ID: 8221845

Claim:
A method for producing a cellulose resin film, comprising the steps of: discharging two cellulose resins A and B molten in respective extruders in the form of an A/B/A three-layer sheet from a die upon a support by co-extrusion; and cooling and solidifying the sheet-shaped molten resin into a film, wherein the resin A, which forms a pair of outer layers of the A/B/A three-layer sheet, has a number average molecular weight smaller than that of the resin B, which forms the inner layer of the A/B/A three-layer sheet, and the resin A has a number average molecular weight of 20,000 or more and 50,000 or less, and the resin B has a number average molecular weight of 30,000 or more and 100,000 or less, wherein the produced cellulose resin film has a surface roughness (Ra) of 0.03 μm or less in the mid portion thereof.