High tenacity polyethylene yarn
First Claim
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1. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 40 g/d and an intrinsic viscosity less than or equal to about 16 dl/g and having infra-red absorbance ratios satisfying the following relationships:
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0.84≧
A1720/A2017≧
0.77
0.77≧
A901/A2017≧
0.71where Ax is the infra-red absorbance at x cm−
1.
1 Assignment
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Accused Products
Abstract
A process for preparing ultra-high molecular weight polyethylene (UHMWPE) multi-filament yarns having improved tensile properties and the yarns and articles thereby produced.
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Citations
4 Claims
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1. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 40 g/d and an intrinsic viscosity less than or equal to about 16 dl/g and having infra-red absorbance ratios satisfying the following relationships:
-
0.84≧
A1720/A2017≧
0.77
0.77≧
A901/A2017≧
0.71where Ax is the infra-red absorbance at x cm−
1.
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2. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 40 g/d and an intrinsic viscosity less than or equal to about 16 dl/g, wherein said yarn has an infra-red absorbance ratio of A1720/A910 less than or equal to about 1.07, where Ax is the infra-red absorbance at x cm−
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3. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 45 g/d and an intrinsic viscosity less than or equal to about 16 dl/g and having infra-red absorbance ratios satisfying the following relationships:
-
0.84≧
A1720/A2017≧
0.77
0.77≧
A901/A2017≧
0.71where Ax is the infra-red absorbance at x cm−
1.
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4. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 45 g/d and an intrinsic viscosity less than or equal to about 16 dl/g, and having an infra-red absorbance ratio of A1720/A910 less than or equal to about 1.07, where Ax is the infra-red absorbance at x cm−
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Specification