STRETCHED CELLULOSE ESTER FILM, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY EMPLOYING THE SAME

摘要

A stretched cellulose ester film produced by stretching after film forming employing a cellulose ester including a polyester polyol obtained from (a) a glycol having an average carbon atom number of 2 to 3.5 and (b) a dibasic or an anhydrous dibasic acid having an average carbon number of 4 to 5.5, wherein the stretched cellulose ester film exhibits retardation value Ro in the range of 30 to 200 nm, and a retardation value Rt in the range of 70 to 400 nm, Ro and Rt are each defined by specific Formulas (1) and (2).