Patent ID: 8263195

Claim:
A cellulose ester film comprising a polycondensate obtained from a diol and a dicarboxylic acid, the polycondensate containing the following (1) and (2): (1) a dicarboxylic acid residue containing an aromatic dicarboxylic acid residue and an aliphatic dicarboxylic acid residue having an average carbon number of 4.0 to 5.0, wherein a ratio of the aromatic dicarboxylic acid residue represented by the following equation is from 40% by mole to 95% by mole: The ratio of the aromatic dicarboxylic acid residue=[(the number of moles of the aromatic dicarboxylic acid residue)/((the number of moles of the aromatic dicarboxylic acid residue)+(the number of moles of the aliphatic dicarboxylic acid residues))]×100; and (2) an aliphatic diol residue having an average carbon number of 2.0 to 3.0.