Patent ID: 8012384

Claim:
A method for manufacturing a polarizing plate protective film comprising the steps of: 1) mixing a cellulose ester resin and an organic additive to obtain a mixing composition in a state of particles comprising the cellulose ester resin and the organic additive both having adjusted particle diameter, 2) placing the mixing composition in a mold and compressing to obtain an integral molding, the integral molding having a size of 1 mm×1 mm×1 mm to 20 mm×20 mm×20 mm, and the cellulose ester resin is contained in the integral molding in a state of particles wherein a weight average particle diameter (cDw50) of the cellulose ester film resin is in the range of 1 to 200 μm, and 3) melting the cellulose ester resin particles in the integral molding by heating the integral molding thereby to form the polarizing plate protective film.