BIODEGRADABLE FILM OR SHEET, METHOD FOR PRODUCING THE SAME AND COMPOSITION FOR BIODEGRADABLE FILM OR SHEET

摘要

A biodegradable film or sheet having sufficient water resistance and strength is provided. Respective components are mixed such that the amount of starch is 0% by mass or more and 35% by mass or less, the amount of protein is 20% by mass or more and 70% by mass or less, the amount of cellulose fiber is 15% by mass or more and 60% by mass or less, and the amount of urea is 1% by mass or more and 15% by mass or less. Water is added in an amount of 10 parts by mass or more and 100 parts by mass or less based on 100 parts by mass of the resulting mixture, and the mixture is well kneaded using a twin-shaft mixer or the like, and rolled out while heating to about 120°C, whereby a film or sheet having a thickness of about several tens to 300 µm is obtained.