Patent ID: 7332214

Claim:
A biodegradable molded article, comprising: a biodegradable expanded molded article molded in a specified shape; and a coating film attached on a surface of the biodegradable expanded molded article, wherein a boundary surface of a layer of the coating film and the surface of the biodegradable molded article is an irregular surface with bumps and dips, and wherein the biodegradable expanded molded article is mainly made of starch or a derivative thereof and molded through steam expansion of a slurry or dough molding material prepared by adding water to the starch or the derivative thereof, and wherein the coating film is mainly made of a biodegradable plastic and has at least hydrophobicity, and the coating film has a melting point of 170° C. or higher, and wherein the biodegradable molded article is obtainable by simultaneously molding the biodegradable expanded molded article and attaching the coating film, the molding being carried out by heating the slurry or dough molding material and the coating film in a mold and by steam-expanding the biodegradable expanded molded article into the specific shape, and the attaching being carried out by compress-bonding the coating film through heating and thereby softening the film so that the coating film is attached on the surface of the biodegradable expanded molded article in the end.