Biodegradable laminated films fabricated from pectin and chitosan
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorPeter D. Hoagland
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Abstract
High modulus, flexible laminated films may be fabricated from chitosan and pectin. Either glycerol or lactic acid as plasticizer and, optionally, starch may also be blended with either the pectin or chitosan solutions used for film preparation. The laminated films are biodegradeable, and the components are derived from renewable agricultural products.
Claims20
A laminated film having one layer consisting essentially of pectin and at least one chitosan film layer, wherein said pectin and said chitosan are present in amounts effective for the formation of films, said pectin film layer and said chitosan film layers are attached such that a laminated film is formed, and said pectin has a high molecular weight, large radius of gyration, high degree of methyl esterification and high intrinsic viscosity at an ionic strength of at least 0.05.
A film comprising a blend of pectin and chitosan HCl, wherein said pectin and said chitosan are present in amounts effective for the formation of a film, wherein said pectin has a high molecular weight, large radius of gyration, high degree of methyl esterification and high intrinsic viscosity at an ionic strangth of at least 0.05, and wherein said blend further comprises starch.
Dependencies are inferred from the claim text.