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US 2004/0166301 A1Published application
Profile-extruded poly(vinyl chloride) articles and method of making same
AssigneePolyOne Corporation
InventorsSang H. Lee, Robert B. Hooks
Life of this patent
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Abstract
A profile-extruded article is disclosed, made of a fiber-reinforced polymer of vinyl-chloride monomer, wherein the article has a ratio of actual specific gravity to theoretical specific gravity of nearly unity. A method of making the article is also disclosed.
Claims20
A profile-extruded article of a fiber-reinforced polymer of vinyl-chloride monomer, wherein the article has a ratio of actual specific gravity to theoretical specific gravity of nearly unity.
A method of making a fiber-reinforced poly(vinyl chloride)-containing article, comprising the steps of:
- (a) feeding granules of poly(vinyl chloride) reinforced with fibers into a two-stage, single-screw extrusion apparatus that has a vent at the beginning of the second stage for devolatilization of outgasses during extrusion;
- and
- (b) extruding fiber-reinforced poly(vinyl chloride) through a profile extrusion die.
Dependencies are inferred from the claim text.