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US 5,916,932 AGranted
Composite building materials from recyclable waste
AssigneeRutgers, The State University
InventorsThomas Jerome Nosker, Richard William Renfree
Life of this patent
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Abstract
A composite building material is disclosed produced from recycled materials. The composite building material is composed of an extruded mixture of high density polyethylene and a thermoplastic coated fiber material such as fiberglass. The resulting material has increased strength and is useful in high stress applications such as railroad ties.
Claims3
A plastic composite railroad tie comprising:
- a polymer component and distributed therein 10-80% of a thermoplastic-coated fiber component based on the weight of said finished railroad tie wherein said thermoplastic-coated fiber has a minimum length of about 0.1 mm and wherein said polymer component contains between about 80 and about 100% HDPE based on the weight of said polymer component.
Dependencies are inferred from the claim text.