High-performance polyethylene multifilament yarn

Patent metadata

Field	Value
Publication number	US-10711375-B2
Application number	US-201916353993-A
Country	US
Kind code	B2
Filing date	Mar 14, 2019
Priority date	Jan 1, 2004
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

Processes for making high-performance polyethylene multi-filament yarn are disclosed which include the steps of a) making a solution of ultra-high molar mass polyethylene in a solvent; b) spinning of the solution through a spinplate containing at least 5 spinholes into an air-gap to form fluid filaments, while applying a draw ratio DR fluid ; c) cooling the fluid filaments to form solvent-containing gel filaments; d) removing at least partly the solvent from the filaments; and e) drawing the filaments in at least one step before, during and/or after said solvent removing, while applying a draw ratio DR solid of at least 4, wherein in step b) each spinhole comprises a contraction zone of specific dimension and a downstream zone of diameter Dn and length Dn with Ln/Dn of from 0 to at most 25, to result in a draw ratio DR fluid =DR sp *DR ag of at least 150, wherein DR sp is the draw ratio in the spinholes and DR ag is the draw ratio in the air-gap, with DR sp being greater than 1 and DR ag at least 1. High-performance polyethylene multifilament yarn, and semi-finished or end-use products containing said yarn, especially to ropes and ballistic-resistant composites, are also disclosed.

First claim

The invention claimed is:

1. High-performance polyethylene multifilament yarn made from linear ultra-high molar mass polyethylene of IV 8-40 dL/g as measured on decalin solutions at 135° C., with total enthalpy of non-reversible transitions as measured by temperature-modulated differential scanning calorimetry (TMDSC) of at least 200 J/g.

2. The high-performance polyethylene multifilament yarn of claim 1 , with total enthalpy of non-reversible transitions as measured by temperature-modulated differential scanning calorimetry (TMDSC) of at least 200 J/g, and at most 211.8 J/g.

3. High-performance polyethylene multifilament yarn made from linear ultra-high molar mass polyethylene of IV 8-40 dl/g as measured on decalin solutions at 135° C., characterized by a peak in the non-reversible TMDSC curve with a maximum at about 152° C. as measured by TMDSC having an enthalpy of at least 35 J/g.

4. The high-performance polyethylene multifilament yarn from claim 3 , characterized by a peak in the non-reversible TMDSC curve with a maximum at about 152° C. as measured by TMDSC having an enthalpy of at least 35 J/g, and at most 52.3 J/g.

5. The high-performance polyethylene multifilament yarn of claim 3 wherein the peak in the non-reversible TMDSC curve with a maximum at about 152° C. as measured by TMDSC has an enthalpy of at least 38 J/g.

6. The high-performance polyethylene multifilament yarn of claim 3 wherein the peak in the non-reversible TMDSC curve with a maximum at about 152° C. as measured by TMDSC has an enthalpy of at least 38 J/g, and at most 52.3 J/g.

7. The high-performance polyethylene multifilament yarn of claim 3 wherein the peak in the non-reversible TMDSC curve with a maximum at about 152° C. as measured by TMDSC has an enthalpy of at least 40 J/g.

8. The high-performance polyethylene multifilament yarn of claim 3 wherein the peak in the non-reversible TMDSC curve with a maximum at about 152° C. as measured by TMDSC has an enthalpy of at least 40 J/g, and at most 52.3 J/g.

9. The multifilament yarn of claim 3 wherein the filaments comprise ultra-high molecular weight polyethylene having an intrinsic viscosity of from 10 dL/g to 30 dL/g as measured in decalin at 135° C.

10. The multifilament yarn of claim 4 wherein the filaments comprise ultra-high molecular weight polyethylene having an intrinsic viscosity of from 10 dL/g to 30 dL/g as measured in decalin at 135° C.

Assignees

• Dsm Ip Assets Bv

Inventors

• Simmelink Joseph Arnold Paul Maria
• Mencke Jacobus Johannes
• Jacobs Martinus Johannes Nicolaas
• Marissen Roeloef

Classifications

• B32B2571/02

  defensive, e.g. armour plates or anti-ballistic clothing · CPC title

• B32B2307/56

  Damping, energy absorption · CPC title

• B32B27/06

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title

• B32B15/14

  next to a fibrous or filamentary layer · CPC title

• B32B7/03

  with respect to the orientation of features (direction of fibres or filaments B32B5/12) · CPC title