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US 7,083,673 B2Granted
Biodegradable or compostable containers
AssigneeNew Ice Limited
InventorsJoe A. Bowden, Christine C. Johnston
Life of this patent
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Abstract
The present invention provides an improved method and materials for forming biodegradable containers that can hold food products in dry, damp or wet conditions and provides the biodegradable containers prepared according to the disclosed process. The containers are produced through the use of a pre-gelled starch suspension that is unique in its ability to form hydrated gels and to maintain this gel structure in the presence of many other types of materials and at low temperatures.
Claims32
A process comprising the steps of:
- (a) forming a pre-gelled paper starch suspension from approximately 5–10% paper pulp by weight of the pre-gel, approximately 5–15%, starch, and approximately 75–90% water by weight of the pre-gel that is maintained at temperatures between 0–60° C.;
- (a) adding to the pre-gelled starch suspension a dry or damp, homogeneous mixture comprising one or more native starches to form a homogenous moldable composition;
- and
- (c) molding the homogenous moldable composition with heat to form a biodegradable material.
1 more element
Dependencies are inferred from the claim text.