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US 4,543,286 AGranted
Composite containing coated extended chain polyolefin fibers
AssigneeAllied Corporation
InventorsGary A. Harpell, Sheldon Kavesh, Igor Palley, Dusan C. Prevorsek
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Abstract
High tenacity, high modulus ultrahigh molecular weight fibers of polyethylene or polypropylene are coated with polyethylene, polypropylene or an ethylene and/or propylene copolymer. The coating improves certain properties of the monofilament or multifilament, including adhesion to various matrices in complex composites and resistance of the fiber to fibrillation.
Claims18
A composite comprising a matrix and:
- (a) a monofilament or multifilament fiber of polyethylene or polypropylene of weight average molecular weight at least about 500,000 having, in the case of polyethylene, a tenacity of at least about 15 g/denier and a tensile modulus of at least about 300 g/denier and, in the case of polypropylene, a tenacity of at least 8 g/denier and a tensile modulus of at least about 160 g/denier;
- and
- (b) a coating on the monofilament and on at least a portion of the filaments of the multifilament containing a polymer having ethylene or propylene crystallinity, said coating being present in an amount between about 0.1% and about 200%, by weight of fiber.
Dependencies are inferred from the claim text.