Wood-Plastic Composites Utilizing Ionomer Capstocks and Methods of Manufacture
First Claim
Patent Images
1. An extruded composite adapted for use as a building material, the extruded composite comprising:
- a core comprising a base polymer and a natural fiber in a substantially homogeneous mixture; and
a capstock comprising an ionomer.
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Abstract
An extruded composite adapted for use as a building material includes a core having a base polymer and a natural fiber in a substantially homogeneous mixture and an ionomer capstock. To improve adherence of the ionomer to a base polymer, the ionomer can be mixed with a similar or substantially similar base polymer prior to coextrusion with the core. Additionally, various additives may be mixed with the capstock material to improve visual aesthetics of the product and performance of the building material, especially over time.
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Citations
31 Claims
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1. An extruded composite adapted for use as a building material, the extruded composite comprising:
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a core comprising a base polymer and a natural fiber in a substantially homogeneous mixture; and a capstock comprising an ionomer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of manufacturing an extruded composite adapted for use as a building material, the method comprising the steps of:
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providing a base polymer; providing a natural fiber; mixing and heating the base polymer and the natural fiber to produce a base mixture comprising a substantially homogeneous melt blend; providing an ionomer; and coextruding the ionomer onto at least a portion of the base mixture through a die to form an extruded profile. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification