Method of preparing a cellulose ester solution, method for producing a cellulose ester film and cellulose ester granulated particles

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a cellulose ester film which has a less optical drawback even if a non-chlorine solvent is used.;SOLUTION: A preparation method of a cellulose ester solution, a manufacturing method of a cellulose ester film and a cellulose ester film comprise dissolving cellulose ester particles having: an angle of repose of not less than 20° to not more than 45°; bulk density of not less than 0.35 g/cm3 to not more than 0.75 g/cm3, tap density of not less than 0.40 g/cm3 to not more than 0.80 g/cm3, condensation of not less than 4% to not more than 20%; a particle size of 1 to 20 mm; and a 2-4C acyl group, in an organic solvent.;COPYRIGHT: (C)2002,JPO