Dainippon Ink and Chemicals, Incorporated

Kousuke Arai

Akio Toyoda

Satoshi Oya

The present invention provides a lactic acid-based polymer laminated product which is little liable to leakage of lactide during molding or storage of the molded product and can degrade at a raised rate and a molded product made of such a laminated product. Disclosed are a novel lactic acid-based polymer laminated product comprising a degradation accelerator barrier layer (II) made of a lactic acid-based polymer (B) having a lactide content of not more than 0.1% by weight laminated on one or both surfaces of a base layer (I) made of a lactic acid-based polymer (A) comprising a degradation accelerator made of lactide and/or organic acid in an amount of from 0.3 to 7% by weight, wherein the ratio of the barrier layer thickness to the base layer thickness is from 0.02 to 1 based on that of the base layer, and a molded product of the laminated product.

Lactic acid-based polymer laminated product and molded product

Disclosed is a heat-sealable lactic acid-based polymer laminates which have heat resistance of 60.degree. C. or above, high sealing strength and good biodegradability and are useful in various films, sheets, packaging containers, etc., comprising a base layer (I) made of a crystallized lactic acid-based polymer (A) and a sealing layer (II) made of an amorphous lactic acid-based polymer (B) having a softening point lower than the melting point of said lactic acid-based polymer (A), and films, sheets or packaging containers with the use of these laminates.

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Chiba, Japan

Kousuke Arai