| abstract |
(57) Abstract: A biaxially stretched molded article made of an aliphatic polyester, wherein the anisotropy of the mechanical strength is eliminated or reduced, and the aliphatic polyester biaxially stretched with stable mechanical strength characteristics. An object of the present invention is to provide a method for producing a molded article and an aliphatic polyester biaxially stretched molded article having improved gas barrier properties. SOLUTION: In a method for producing a stretched aliphatic polyester molded article, which comprises biaxially stretching a preformed article of a resin mainly composed of an aliphatic polyester, biaxial stretching of the preformed article is performed at a high initial stretching speed. A method of producing a stretch-molded article, characterized in that molding is performed by providing a negative gradient in the stretching speed so that the final stretching speed is reduced, and that a gas barrier property is also improved by depositing a hard carbon film. . |