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US 5,849,410 AGranted
Coextruded monofilaments
AssigneeE. I. Du Pont de Nemours and Company
InventorsCharles Fletcher Nelson, Robert Lee Rackley
Life of this patent
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Abstract
This invention relates to a coextruded monofilament having a sheath made of a first resin and a core made of a second resin which is different than the first resin and which has a higher coefficient of friction than the first resin. The core of the monofilament is exposed at the tip by conventional mechanical end-rounding techniques to form a tip with a higher coefficient of friction than the tip of a typical monofilament.
Claims7
A coextruded monofilament comprising:
- a sheath material comprising a first resin selected from the group consisting of nylon, polyester, polyurethane, polyvinylidene chloride, or polyvinylidene fluoride, or mixtures thereof, and
- a core material concentric with said sheath material comprising a second resin, said second resin being a thermoplastic elastomer, wherein said second resin is different from said first resin and has a higher coefficient of friction than said first resin,
- wherein said core material is exposed at the end of the monofilament.
Dependencies are inferred from the claim text.