Water-insoluble protein-based edible barrier coatings and films
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United States of America Patent
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Aug 6, 1996
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N/A
app pub date -
Jun 17, 1994
filing date -
Jun 17, 1994
priority date (Note) -
Expired
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Abstract
This invention describes new water-insoluble protein-based edible coatings and films having improved barrier and mechanical properties, and methods for their preparation from water-soluble proteins. In the invention, aqueous protein solutions are denatured with heat, chemicals and/or enzymes to induce thiol-disulfide interchange and thiol oxidation reactions, thereby forming new intermolecular and intramolecular disulfide crosslinkages. The formation of covalent intermolecular crosslinkages in protein-based edible films and coatings results in films having improved barrier and mechanical properties which are insoluble in water. Water-insoluble emulsion film systems can be formed by incorporating lipids into the denatured aqueous protein matrix.
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