| abstract |
The present invention provides a cellulose ester film that can be produced at a low equipment cost, is less prone to failure during winding, has sufficient transparency, and has a good surface shape. SOLUTION: A cellulose ester containing 0.05 to 2% by mass of a phenolic or phosphorous acid stabilizer and having a substitution degree in a specific range is melted at 180 to 240 ° C. and extruded from a die to form a film. The end portion of the obtained film is slit and knurled. Thereby, film thickness 20-300 μm, arbitrary lateral direction film thickness deviation 0.01-2.0 μm, squeeze value 0.4-1.4, longitudinal knurling height 1-20 μm, average knurling height 5 A cellulose ester film having a deviation of ˜15 μm and a knurling height deviation of 1˜10 μm is obtained. [Selection] Figure 1 |