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US 5,646,206 AGranted
Films fabricated from mixtures of pectin and poly(vinyl alchohol)
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsDavid R. Coffin, Marshall L. Fishman
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Abstract
High modulus, flexible films may be fabricated from blend of pectin, poly(vinyl alcohol) and, optionally, plasticizers. The combination of pectin and poly(vinyl alcohol) is advantageous in that pectin increases the biodegradability of poly(vinyl alcohol). In addition, the use of pectin provides effective utilization of an agricultural product.
Claims10
A film consisting essentially of a blend of pectin and poly(vinyl alcohol) in amounts effective for the formation of a film.
A method of making a film, said method comprising
- a) dissolving poly(vinyl alcohol) in an aqueous medium at a temperature sufficient to dissolve said poly(vinyl alcohol),
- b) adding an effective amount of pectin to the poly(vinyl alcohol) solution to form a pectin/poly(vinyl alcohol) blend,
- c) casting the blend on a plate, such that a film is formed,
- d) allowing the film to dry, and
- e) removing the film from the plate.
2 more elements
Dependencies are inferred from the claim text.