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US 2011/0238092 A1Published application
Ultrahigh molecular weight polyethylene yarn
AssigneeDsm IP Assets B.V.
InventorsClaudia Maria Vaz, Erik Becker, Harm van der Werff
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Abstract
The invention relates to an ultrahigh molecular weight polyethylene (UHMwPE) yarn and to a method for producing thereof. The invention also relates to a medical device comprising the yarn. A UHMwPE yarn is provided having a diameter of 30 μm or more and a residual spin solvent of less than 100 ppm, wherein the yarn is a gel-spun monofilament.
Claims15
A UHMwPE yarn having a diameter of 30 μm or more and a residual spin solvent of less than 100 ppm, wherein the yarn is a gel-spun monofilament.
A process for making a UHMwPE yarn, comprising the steps of:
- a) spinning a solution filament from a solution of UHMwPE in a solvent;
- b) cooling the solution filament obtained to form a gel filament;
- c) drying the gel filament, during which the solvent is at least partly removed;
- and
- d) drawing the gel filament in at least one drawing step after the step c) of drying the gel filament, to obtain a monofilament having a diameter of 30 μm or more and a residual spin solvent residue of less than 100 ppm, which monofilament forms the yarn.
2 more elements
Dependencies are inferred from the claim text.