IP Library › Granted Patent US 8,444,897
Granted Patent B2
US 8,444,897 · App. 12/442,522 · Granted May 21, 2013

Blending plastic and cellulose waste products for alternative uses

Inventors: Lawrence D. Reaveley (Salt Lake City, UT); Mark Bryant (Salt Lake City, UT)
Assignee: University of Utah Research Foundation
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Quick Facts
Patent No.
US 8,444,897
App. No.
12/442,522
Granted
May 21, 2013
Kind
B2
Abstract

The present invention relates to methods for reclaiming plastics and cellulose materials for use in a variety of applications, including as alternative fuel sources. According to one embodiment of the invention, waste is received which includes cellulose materials and plastics. Such materials are sorted from other materials and the cellulose and plastic materials are shredded or ground and then blended together. The blended materials can then be fed to an energy converter, such as a combustion unit or a gasifier, where they are burned as fuel source or used to create synthetic gas. In other embodiments, the blended materials are heated or have a binding element added thereto. Such mixture is then compressed to form a desired shape or sized object, and that object can then be packaged, distributed or used. The blended object can be used as a fuel source, or as a building, sound attenuation, or insulation material.

Claims (22)

1. A method for reclaiming waste by-products, comprising:

receiving waste from a municipal waste stream, the received waste including at least cellulose materials and plastic materials;

blending said cellulose materials and said plastic materials of said received waste to produce a blended mixture of reclaimed materials;

after blending said cellulose materials, forming said blended mixture of reclaimed materials into a structural member, wherein forming said blended mixture includes:

heating said blended mixture of reclaimed materials; and

compressing said blended mixture of reclaimed materials to form said structural member, wherein said structural member is configured to resist one or more loads and includes a plurality of grooves or holes; and

customizing reinforcement of said structural member by affixing at least one reinforcement member in any one of said plurality of grooves or holes to obtain one or more desired mechanical properties in said structural member.

2. A method as recited in claim 1 , wherein forming said blended mixture further comprises:

adding a binding agent to said blended mixture of reclaimed materials.

3. A method as recited in claim 1 , wherein compressing said blended mixture comprises one or more of: extruding, molding, forming, or shaping.

4. A method as recited in claim 1 , the method further comprising:

after compressing said blended mixture, cooling said blended mixture and cutting said structural member to a desired length.

5. A method as recited in claim 1 , further comprising:

affixing one or more reinforcement straps to an outer surface of said structural member.

6. A method as recited in claim 1 , further comprising:

affixing one or more plates to an outer surface of said structural member, wherein at least one of said one or more plates includes protruding prongs.

7. A method as recited in claim 1 , wherein said structural member comprises a structural beam.

8. A method as recited in claim 7 , further comprising:

combining said structural beam with a second beam to form a composite beam.

9. A method as recited in claim 1 , further comprising:

adding a strengthening structure to said blended mixture before compressing said blended mixture.

10. A method as recited in claim 9 , wherein said strengthening structure is strands of fiberglass or one or more composite rods.

Continuity (2)
Provisional Application 60863562 · Oct 30, 2006
Related Publication 20100144905A1 · Jun 10, 2010