Compositions for resilient biodegradable packaging material products
AssigneeFree-Flow Packaging Corporation
InventorsHans G. Franke, Donald R. Bittner
Life of this patent
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Abstract
A resilient, low density, biodegradable, packaging material which is formed by the extrusion through a twin-screw extruder of a base mixture of vegetable oil, polyvinyl alcohol, glycerine, a proteinaceous grain meal, glycerol monostearate, a non-modified starch and water.
Claims8
A base mixture for use in producing a resilient, biodegradable packaging material product, said mixture comprising the following first six ingredients plus added water expressed in % by weight of the first six ingredients:
- (a) vegetable oil:
- about 0.5% to about 5%;
- (b) polyvinyl alcohol:
- about 5% to about 25%;
- (c) glycerine:
- about 0.5% to about 10%;
- (d) proteinaceous grain meal:
- about 3% to about 10%;
- (e) glycerol monostearate:
- about 0.1% to about 0.8%;
- (f) non-modified starch:
- about 45% to about 90%;
- and
- (g) added water:
- about 0% to about 30%.
A base mixture for use in producing a resilient, biodegradable packaging material product, said mixture comprising the following first six ingredients plus added water expressed in % by weight of the first six ingredients:
- (a) vegetable oil:
- about 0.5% to about 3%;
- (b) polyvinyl alcohol:
- about 6% to about 20%;
- (c) glycerine:
- about 0.5% to about 3%;
- (d) proteinaceous grain meal:
- about 3% to about 7%;
- (e) glycerol monostearate:
- about 0.1% to about 0.5%;
- (t) non-modified starch:
- about 55% to about 88%;
- and
- (g) added water:
- about 5% to about 15%.
A biodegradable packaging material product comprising an expanded composition of about 0.5% to about 5% vegetable oil, about 5% to about 25% polyvinyl alcohol, about 0.5% to about 10% glycerine, about 3% to about 10% proteinaceous grain meal, about 0.1% to about 0.8% glycerol monostearate and about 45% to about 70% non-derivatized starch, said product having a moisture content of from about 7.0% to about 12.0% by weight of said composition.
A base mixture for use in producing a resilient, biodegradable packaging material product, said mixture comprising the following first six ingredients plus added water expressed in % by weight of the first six ingredients:
- (a) vegetable oil:
- about 0.5% to about 5%;
- (b) polyvinyl alcohol:
- about 5% to about 25%;
- (c) glycerine:
- about 0.5% to about 10%;
- (d) proteinaceous grain meal:
- about 3% to about 10%;
- (e) glycerol monostearate:
- about 0.1% to about 0.8%;
- (f) non-modified starch with an about 19% to about 44% by weight amylose content:
- about 45% to about 90%;
- and
- (g) added water:
- about 0% to about 30%.
Dependencies are inferred from the claim text.