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US 6,632,387 B2Granted
Method for making wood and plastic composite material
AssigneesP & M Plastics, The United States of America as represented by the Secretary of Agriculture
InventorsPhil T. Archuletta, James H. Muehl
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Abstract
A method of preparing wood and plastic to produce a composite material.
Claims24
A press method of making a composite material comprising the steps of:
- a) selecting a tree from the group consisting of conifers and junipers;
- b) preparing a natural material by grinding the whole tree into particles having an average particle size of less than approximately 0.25 inch, the particles including trunk particles, branch particles, needle particles, and bark particles;
- c) providing a frame;
- d) loading the natural material and a plastic into the frame;
- and
- e) applying heat and pressure to the natural material and plastic in the frame.
3 more elements
An extrusion method of making composite material comprising the steps of:
- a) selecting a tree from the group consisting of conifers and junipers;
- b) preparing a natural material by grinding the whole tree into particles having an average particle size of less than approximately 0.25 inch, the particles including trunk particles, branch particles, needle particles, and bark particles;
- c) feeding the natural material and a plastic into an extruder;
- d heating the natural material and plastic in the extruder;
- and
- e) extruding composite material comprising the natural material and plastic from the extruder.
3 more elements
Dependencies are inferred from the claim text.