| 摘要 |
A method for producing a cellulose resin film includes: feeding molten resin into a die through piping, and casting it as a sheet onto a rotating cooling support. In the piping, leaf disc filters removing contaminants from the molten resin are circularly provided in a hollow shaft. A filtration device having a connection hole connects the leaf disc filters and the shaft inside. A static mixer has an element satisfying condition (A) in a lower step of the filtration device, decontaminated molten resin is rekneaded by the static mixer and fed into the die: (A) when viscosity of the molten resin is &rgr;(Pa·s), a charging amount of the molten resin is V (kg/h), number of connection holes in the filtration device is m, and number of steps of the static element in the static mixer is n, &rgr;×V<2n×m×V is satisfied.
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