METHOD FOR REGENERATING CELLULOSE ACETATE FILM, REGENERATED CELLULOSE ACETATE FILM AND POLARIZING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a method for regenerating cellulose acetate having a stable quality from polarizing plates at a low cost. SOLUTION: The method for regenerating cellulose acetate film comprises a process in which cellulose acetate film containing acetone-soluble cellulose acetate is treated with an organic solvent which does not dissolve cellulose triacetate having a degree of acetylation of 60% but dissolves acetone-soluble cellulose acetate, at 23 deg.C.