Wood fiber polymer composite extrusion and method
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United States of America Patent
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app pub date -
Nov 21, 2003
filing date -
Mar 6, 2000
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Abandoned
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Abstract
A method for extruding a thermoplastic polymer/wood fiber composite utilizes styrene acrylonitrile as the principal thermoplastic component. Acrylonitrile butadiene styrene is used as a stiffener and modifier to prevent degradation of a foaming agent's efficacy. The method of the invention and the extrusion produced by the inventive method are particularly applicable to extrusions having high aspect ratio cross-sectional shapes and extrusions in which the ratio of wall thickness to interior volume is large.
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