Foam wood extrusion product
AssigneeRoyal Wood, Inc.
InventorsKendall W. Prince, Gordon L. King
Life of this patent
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Abstract
An extruded product having a foam core is formed by blending powdered cellulose with a base resin and an oxidizer to yield a first mixture. The first mixture is compressed, heated and extruded to form a pelletized compound which is compressed and heated into a homogeneous extrudable mixture. Moisture is extracted from the powdered cellulose at one or more points during the process to achieve a moisture content of less than about two percent. A protective cladding is coaxially extruded around a core of the extrudable mixture to form an elongated product having a foam core at least partially enclosed by the protective cladding.
Claims2
A Venetian blind slat formed by the process of extruding a core of powdered cellulose and a foamed thermoplastic resin, wherein said core comprises between about 1 percent and 40 percent powdered cellulose by weight and about 2 percent or less water by weight, and said core is at least partially surrounded by a coextruded protective cladding of thermoplastic material.
Dependencies are inferred from the claim text.