Patent ID: 7981957

Claim:
A biodegradable gas barrier container comprising 100 parts by mass of a biodegradable polyester resin having a polylactic acid content of not less than 50% by mass, and 0.1 to 10 parts by mass of a phyllosilicate having layers, wherein a substituted silyl group having a substituted or unsubstituted alkyl group is bonded between the layers thereof, and said biodegradable gas barrier container is a container which is heat-treated at a temperature not lower than a glass transition temperature and not higher than a melting starting temperature of the resin as measured by a differential scanning calorimeter (DSC) during the molding, the biodegradable gas barrier container having a crystallinity of not lower than 15% as measured by X-ray diffractometry, and an oxygen permeability coefficient of not higher than 50 ml·mm/m 2 ·day·MPa as measured at 20° C. at a relative humidity of 90%.