Patent ID: 7651743

Claim:
A cellulose acylate film that has a crystallization index expressed by expression (A) of from 0.75 to 0.95 and a modulus of elasticity in every arbitrary direction of an in-plane of the cellulose acylate film of from 3,800 MPa to 6,000 MPa, Crystallization index=(X-ray diffraction intensity at 2θ of 27°)/(X-ray diffraction intensity at 2θ of 25°), (A) wherein a viscosity average polymerization degree of the cellulose acylate is from 350 to 500, and a value of Mw/Mn of the cellulose acylate is 2.0 to 3.0 in which Mw is a mass average molecular weight of the cellulose acylate and Mn is a number average molecular weight of the cellulose acylate.