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US 3,997,703 AGranted
Multilayered molded plastics of pullulan and polymers, paper or aluminum foil
AssigneesSumitomo Chemical Company, Limited, Hayashibara Biochemical Laboratories, Incorporated
InventorsSeizo Nakashio, Kozo Tsuji, Nobuhiro Toyota, Fumio Fujita, Takami Sato
Life of this patent
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Abstract
A multilayered molded plastic having at least one layer comprising pullulan. The molded plastic is low in gas permeability, transparent, high in strength and non-toxic.
Claims9
A multilayered molded plastic which comprises at least one layer comprising pullulan and at least one layer selected from the group consisting of layers composed of homopolymers and copolymers of olefins and/or vinyl compounds, polyesters, polyamides, celluloses, polyvinyl alcohols, rubber hydrochlorides, paper and aluminum foil.
Dependencies are inferred from the claim text.