High tenacity high modulus UHMWPE fiber and the process of making

Patent metadata

Field	Value
Publication number	US-10450676-B2
Application number	US-201715704105-A
Country	US
Kind code	B2
Filing date	Sep 14, 2017
Priority date	Feb 24, 2012
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

Processes for preparing ultra-high molecular weight polyethylene (“UHMW PE”) filaments and multi-filament yarns, and the yarns and articles produced therefrom. Each process produces UHMW PE yarns having tenacities of 45 g/denier to 60 g/denier or more at commercially viable throughput rates.

First claim

What is claimed is:

1. An ultra-high molecular weight polyethylene (UHMW PE) multi-filament yarn fabricated from a UHMW PE polymer having an intrinsic viscosity of at least about 21 dl/g and having a yarn intrinsic viscosity that exceeds 90% relative to the intrinsic viscosity of the UHMW PE polymer, wherein said intrinsic viscosities are measured in decalin at 135° C. according to ASTM D1601-99.

2. The yarn of claim 1 wherein the yarn is fabricated from a UHMW PE polymer having a ratio of weight average molecular weight to number average molecular weight (M w /M n ) of 3 or less.

3. The yarn of claim 1 wherein the yarn intrinsic viscosity exceeds 95% relative to the intrinsic viscosity of the UHMW PE polymer, and wherein said yarn is fabricated from a UHMW PE polymer having an intrinsic viscosity of at least 21 dl/g.

4. The yarn of claim 1 wherein said yarn is fabricated from a UHMW PE polymer having an intrinsic viscosity of greater than 21 dl/g, and wherein the yarn intrinsic viscosity is at least 21 dl/g.

5. The yarn of claim 1 wherein said yarn is fabricated from a UHMW PE polymer having an intrinsic viscosity of from 30 dl/g to about 100 dl/g, and wherein the yarn intrinsic viscosity is at least 28 dl/g.

6. The yarn of claim 1 wherein the yarn is fabricated from a UHMW PE polymer having an intrinsic viscosity of from 45 dl/g to about 100 dl/g, and wherein the UHMW PE polymer has a ratio of weight average molecular weight to number average molecular weight (M w /M n ) of 3 or less.

7. The yarn of claim 1 wherein the yarn is fabricated from a UHMW PE polymer having an intrinsic viscosity of from 50 dl/g to about 100 dl/g.

8. The yarn of claim 1 wherein the yarn comprises a plurality of filaments and has a denier per filament of 1.4 dpf or greater.

9. A composite formed from a plurality of yarns of claim 1 .

10. The composite of claim 9 wherein said composite is non-woven and wherein said yarns are substantially coated with a polymeric binder.

Assignees

• Honeywell Int Inc

Inventors

• Tam Thomas
• Young John Armstrong
• Klein Ralf
• Tallent Mark
• Ardiff Henry Gerard

Classifications

• D01D5/06

  Wet spinning methods {(D01D5/0046 takes precedence)} · CPC title

• D02G3/02

  Yarns or threads characterised by the material or by the materials from which they are made · CPC title

• D04H1/593

  to layered webs · CPC title

• D04H1/70

  characterised by the method of forming fleeces or layers, e.g. reorientation of fibres · CPC title

• D04H13/00

  Other non-woven fabrics · CPC title