Cellulose acetate excellent in physical strength, and process for production thereof

摘要

PCT No. PCT/JP96/00861 Sec. 371 Date Nov. 21, 1996 Sec. 102(e) Date Nov. 21, 1996 PCT Filed Mar. 29, 1996 PCT Pub. No. WO96/30412 PCT Pub. Date Oct. 3, 1996An object of the invention is to obtain cellulose acetate having improved physical properties, particularly film strength and improved flexibility of the molded product. Cellulose acetate having an average degree of acetylation of not less than 59%, viscosity average degree of polymerization (DP) of not less than 290. and concentrated solution viscosity ( eta ) according to falling ball viscosity method for viscosity average degree of polymerization (DP) expressed by the following formula (1):2.814xln(DP)-11.753