Patent ID: 7462306

Claim:
A process for producing a cellulose acylate film, comprising: casting a dope having a solid content of from 17% by weight to 25% by weight on a support, and drying the resulting material immediately after the casting by blowing an air stream at a speed of 1 m/min or above, wherein the cellulose acylate film comprises an additive and a matting agent having an average primary particle size of from 1 nm to 20 nm, wherein the matting agent has an average secondary particle size of from 0.05 μm to 1.05 μm, wherein the cellulose acylate film has a crystallization index represented by expression (A) of from 0.80 to 1.10, Crystallization index=(X-ray diffraction intensity at 2θ of 27°)/(X-ray diffraction intensity at 2θ of 25°), (A) wherein the cellulose acylate film has an in-plane orientation degree, as determined by X-ray diffraction of from 0.20 to 0.50, and wherein the cellulose acylate film has an in-plane retardation Re and a retardation Rth in a thickness direction at a wavelength of 590 nm, which satisfy expressions (I) to (III); and a haze of from 0.05 to 0.7%: 20 ≦Re≦ 50 Expression (I) 70 ≦Rth≦ 200 Expression (II) 1.0 ≦Rth/Re≦ 3.0 Expression (III) wherein each of Re and Rth is a value at 25° C. and 60% RH, and has a unit of nm.