Ultra high molecular weight polyethylene multifilament yarn
AssigneeAvient Protective Materials B.V.
InventorsJacobus Johannes Mencke, Johannes Hendrikus Marie Heijnen, Harm Van Der Werff
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Abstract
Process for spinning multifilament yarn containing n filaments are provided, wherein an ultra-high molecular weight polyethylene (UHMWPE) solution containing UHMWPE polymer and a solvent for the UHMWPE polymer are spun through n spin-holes of a spin plate and drawn before, during or after removal of the solvent to thereby obtain the multifilament yarn containing n filaments, the yarn having a tenacity (Ten) as expressed in cN/dtex of Ten(cN/dtex)=f×n−0.05×dpf−0.15, wherein Ten is at least 39 cN/dtex, n is at least 25, f is a factor of at least 62.0 and dpf is the dtex per filament.
Claims21
A process for manufacturing a multifilament yarn containing n filaments, wherein the process comprises the steps of:
- (a) providing an ultrahigh molecular weight polyethylene (UHMWPE) solution comprised of UHMWPE polymer in a solvent for the UHMWPE polymer;
- (b) passing the solution of step (a) through a spinning plate containing n spin-holes to form the n filaments of the multifilament yarn;
- and
- (c) drawing the filaments in at least one drawing step before, during or after removing the solvent to thereby obtain a multifilament yarn with a tenacity (Ten) as expressed in cN/dtex according to Formula 1:
- Ten(cN/dtex)=f×n−0.05×dpf−0.15 (Formula 1)
- wherein Ten is at least 39 cN/dtex, n is at least 25, f is a factor of at least 62.0 and dpf is the dtex per filament.
Dependencies are inferred from the claim text.