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US 6,528,088 B1Granted
Highly flexible starch-based films
AssigneeA. E. Staley Manufacturing Company
InventorsG. M. Gilleland, J. L. Turner, P. A. Patton, M. D. Harrison
Life of this patent
Estimating the term…
Abstract
Film-forming compositions are disclosed that can comprise, on a dry solids basis, 25 to 75 percent by weight of certain starch derivatives and 25 to 75% primary external plasticizer. The starch derivatives can be chemically modified starches that range in molecular weight from 100,000 to 2,000,000. The high levels of plasticizer in the films give excellent film flexibility and integrity.
Claims21
A gelatin-free film-forming composition, comprising:
- starch material having an average molecular weight of about 100,000-2,000,000 and a dextrose equivalent less than about 1 and selected from the group consisting of (a) starch which has been chemically modified with a monoreactive moiety to a degree of substitution of at least about 0.015 and is selected from the group consisting of ether and ester derivatives of starch and (b) waxy starch;
- and
- a primary external plasticizer;
- wherein the weight ratio of plasticizer to starch material is at least about 0.5:1.
1 more element
Dependencies are inferred from the claim text.