Compositions for resilient biodegradable packaging material products
First Claim
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1. 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%.
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Accused Products
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.
61 Citations
8 Claims
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1. 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:
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(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%.
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2. 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:
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(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%. - View Dependent Claims (3)
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- 4. 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.
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8. 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:
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(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%.
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Specification
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Current AssigneeFree-Flow Packaging International, Inc. (Pregis Ultimate Holdings Corp.)
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Original AssigneeFree-Flow Packaging International, Inc. (Pregis Ultimate Holdings Corp.)
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InventorsFranke, Hans G., Bittner, Donald R.
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Primary Examiner(s)BRUNSMAN, DAVID M
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Application NumberUS08/304,365Time in Patent Office596 DaysField of Search106/154.1, 106/211, 106/213US Class Current106/126.1CPC Class CodesC08J 2303/02 Starch; Degradation product...C08J 9/125 Water, e.g. hydrated saltsC08L 2201/06 BiodegradableC08L 2666/02 Organic macromolecular comp...C08L 29/04 Polyvinyl alcohol; Partiall...C08L 3/02 Starch; Degradation product...C08L 91/00 Compositions of oils, fats ...C08L 99/00 Compositions of natural mac...
