| abstract |
(57) [abstract] (with correction) [PROBLEMS] A melt extrudable material containing cellulose acetate as a main component. Provided is a biodegradable film or sheet excellent in moisture resistance, low odor, and biodegradability, and also excellent in transparency. SOLUTION: Cellulose acetate having a degree of acetyl substitution of 2.3 to 2.7 and a biodegradable plasticizer as main components are used as components. Tensile modulus at 3 ° C. and 0% RH is 100 kg / m m 2 or more, and the tensile modulus at 23 ° C. and 60% RH is 80% of the tensile modulus at 23 ° C. and 0% RH. And the biodegradable plasticizer comprises the following (1) A biodegradable film or sheet comprising one or a combination of two or more compounds selected from the group consisting of a compound represented by the general formula: and a compound represented by the following (2): (1) H 5 C 3 ( OH) 3-n (OOCCH 3) n 0 <N ≦ 3 (2) Glycerin alkylate (the alkyl group may have 2 to 20 carbon atoms and may have a hydroxyl group residue), ethylene glycol alkylate, polyethylene glycol alkylate and the like. |