Patent ID: 8187514

Claim:
A method for producing a biodegradable molded article, comprising the steps of: directly heating a molding material by dielectric heating to form a biodegradable expanded molded article, the biodegradable expanded molded article being molded in a specified shape with an irregular surface by steam expansion molding of the molding material, and simultaneously thermally softening a coating film and attaching the thermally softened coating film to the irregular surface of the biodegradable expanded molded article so as to maintain the irregular surface of the biodegradable expanded molded article. wherein the coating film is mainly made of a biodegradable plastic and having at least hydrophobicity, the molding material is a slurry or dough molding material mainly made of a starch or a starch derivative and prepared by adding water to the starch or the starch derivative, and the starch or the starch derivative contains high-amylose starch or high-amylose starch derivative.