Highly flexible starch-based films
AssigneeA. E. Staley Manufacturing Company
InventorsGregory M. Gilleland, Judy L. Turner, Penelope A. Patton, Michael D. Harrison
Life of this patent
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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. The films are also resistant to penetration by water, oil and/or grease.
Claims17
A gel coated tablet comprising:
- a sealed capsule wall and a first substance that is encapsulated by the sealed capsule wall;
- wherein the capsule wall comprises a composition comprising (a) starch material having a dextrose equivalent less than about 1 and selected from the group consisting of modified starch and waxy starch and (b) a primary external plasticizer, wherein the weight ratio of plasticizer to starch material is at least about 0.5:1.
A material resistant to penetration by at least one of grease, oil, and water, comprising a flexible substrate and a coating thereon, the coating comprising (a) starch material having a dextrose equivalent less than about 1 and selected from the group consisting of modified starch and waxy starch, wherein the starch material comprises starch (i) which has been chemically modified with a monoreactive moiety to a degree of substitution of between 0.015 and 0.3 and (ii) which has an average molecular weight of between about 100,000 and 2,000,000, and (b) a primary external plasticizer, wherein the weight ratio of plasticizer to starch material is at least about 0.5:1.
A material resistant to penetration by at least one of grease, oil, and water, comprising a flexible substrate and a coating thereon, the coating comprising (a) starch material having a dextrose equivalent less than about 1 and selected from t e group consisting of hydroxypropyl, hydroxyethyl, succinate, and octenyl succinate starch, wherein the starch material comprises starch (i) which has been chemically modified with a monoreactive moiety to a degree of substitution of at least about 0.015 and (ii) which has an average molecular weight of between about 100,000 and 2,000,000, and (b) a primary external plasticizer, wherein the weight ratio of plasticizer to starch material is at least about 0.5:1.
Dependencies are inferred from the claim text.