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US 5,135,804 AGranted
Network of polyethylene fibers
AssigneeAllied-Signal Inc.
InventorsGary A. Harpell, Sheldon Kavesh, Igor Palley, Dusan C. Prevorsek
Life of this patent
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Abstract
A network of non-porous polyethylene fibers substantially free of voids formed by preparing a network of gel spun fibers, applying pressure to the network at a temperature and pressure and for a time adequate to form a translucent film substantially free of voids.
Claims2
A network of non-porous polyethylene fibers substantially free of voids formed by process consisting essentially of the steps of:
- (a) preparing a network of gel spun fibers having a weight average of molecular weight of at least about 1 million, a tenacity of at least about 20 g/denier and a tensile modulus at least about 1,000 g/denier
- (b) applying pressure to said network of fibers at a temperature ranging from 110.degree. C. to 155.degree. C. and at a pressure and for a time adequate to form a translucent film substantially free of voids and wherein the tensile strength of the original fiber in the network is retained at a level at least 75 percent of the original fiber.
Dependencies are inferred from the claim text.