Modified polyolefin fiber
AssigneeAllied Corporation
InventorsGary A. Harpell, Sheldon Kavesh, Igor Palley, Dusan C. Prevorsek
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Abstract
Fibers prepared by spinning, drawing and drying dilute solutions of ultrahigh molecular weight polyethylene or polypropylene are modified by including in the dilute solution a polymeric additive. The polyethylene fibers so prepared have melting points above 140.degree. C. and exhibit improved adherence to matrices, resistance to fibrillation and other advantageous properties. Additives include lower molecular weight polyolefins, oxidized polyolefins, olefin copolymers, polyolefin graft copolymers and polyoxymethylenes.
Claims15
A stretched fiber having tenacity at least 15 g/denier, tensile modulus at least 500 g/denier and main melting temperature at least 140.degree. C., comprising polyethylene of molecular weight at least about 500,000 and a polymeric additive selected from the group consisting of copolymers containing monoolefins as primary monomers, polyolefins of molecular weight not greater than 250,000, oxidized polyolefins and polyoxymethylenes, with the weight of polymeric additive being at least 2% of the weight of the polyethylene.
Dependencies are inferred from the claim text.