Advanced polymer wood composite
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United States of America Patent
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Oct 27, 1998
Issued Date -
N/A
app pub date -
Oct 17, 1995
filing date -
Aug 31, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a thermoplastic composite material consisting essentially of a thermoplastic polymer and a wood fiber. The composite can be used in the form of a linear extrudate or a thermoplastic pellet to manufacture structural members. The linear extrudate or pellet can have any arbitrary cross-section or can be a regular geometric shape. Typically the thermoplastic polyvinyl chloride polymer and the wood fiber are combined and extruded in the form of a pellet. The pellet can be then taken, placed in an extruder and extruded in the form of a structural member. The composite material of the invention can be used to form structural members having high modulus (greater than about 500,000 psi). The thermoplastic structural members of the invention can then be recycled to form new thermoplastic.
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