Fiber comprising polyethylene blend

Patent metadata

Field	Value
Publication number	US-10145027-B2
Application number	US-201414771275-A
Country	US
Kind code	B2
Filing date	Feb 27, 2014
Priority date	Mar 11, 2013
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

The present disclosure is directed to a fiber that is composed of a polymeric blend including (i) 95 wt % to 99 wt % of a high density ethylene-based polymer having a Mw/Mn from 2.0 to 3.0 and (ii) from 5 wt % to 1 wt % of a low density ethylene-based polymer having a melt index from 5 g/10 min to 15 g/10 min. The fiber has a density from 1 denier to 2 denier and a 3% secant modulus from 8.5 g/denier to 20 g/denier.

First claim

We claim:

1. A fiber comprising:
a polymeric blend comprising
from 95 wt % to 99 wt % of a high density ethylene-based polymer having a M w /M n from 2.0 to 3.0;
from 5 wt % to 1 wt % of a low density ethylene-based polymer having a melt index from 5 g/10 min to 15 g/10 min wherein the low-density ethylene-based polymer is present to the exclusion of linear low density polyethylene; and
the fiber having a density from 1 denier to 2 denier and a 3% secant modulus from 8.5 g/denier to 20 g/denier.

2. The fiber of claim 1 having a 3% secant modulus from 10 g/denier to 20 g/denier.

3. The fiber of claim 1 having a ramp-to-break from 2600 mpm to 3200 mpm.

4. The fiber of claim 1 wherein the high density ethylene-based polymer has a density from greater than 0.930 g/cc to 0.96 g/cc and a melt index from 15 g/10 min to 20 g/10 min.

5. The fiber of claim 1 wherein the high density ethylene-based polymer has a Mz/Mw less than 2.0.

6. The fiber of claim 1 wherein the high density ethylene-based polymer has a zero-shear viscosity ratio greater than 1.1.

7. The fiber of claim 1 wherein the high density ethylene-based polymer has a vinyls/10 6 carbons of less than 100.

8. The fiber of claim 1 wherein the low density ethylene-based polymer has a density from 0.915 g/cc to 0.925 g/cc and a melt index from 5 g/10 min to 15 g/10 min.

9. The fiber of claim 1 wherein the fiber is a melt-spun fiber.

10. The fiber of claim 1 wherein the fiber has a density of 2 denier, a 3% secant modulus from 10 g/denier to 20 g/denier, a tensile strength from greater than 1.0 g/denier to 1.3 g/denier, and a ramp-to-break from 2600 mpm to 3200 mpm.

11. The fiber of claim 1 wherein the fiber has a heat of crystallization greater than 205 J/g.

12. A fabric comprising the fiber of claim 1 .

13. The fiber of claim 1 wherein the high density ethylene-based polymer is an ethylene/octene copolymer.

14. A fiber comprising:
a polymeric blend comprising
from 95 wt % to 99 wt % of a high density ethylene-based polymer having
(i) a M w /M n from 2.0 to 3.0;
(ii) a zero-shear viscosity ratio greater than 1.1;

from 5 wt % to 1 wt % of a low density ethylene-based polymer (LDPE) having a melt index from 5 g/10 min to 15 g/10 min, the LOPE present to the exclusion of linear low density polyethylene; and
the fiber having a density from 1 denier to 2 denier and a 3% secant modulus from 8.5 g/denier to 20 g/denier.

15. The fiber of claim 14 wherein the high density ethylene-based polymer has a Mz/Mw less than 2.0.

16. The fiber of claim 15 wherein the high density ethylene-based polymer has a density from greater than 0.930 g/cc to 0.96 g/cc and a melt index from 15 g/10 min to 20 g/10 min.

17. The fiber of claim 16 having a ramp-to-break from 2600 mpm to 3200 mpm.

18. The fiber of claim 17 wherein the high density ethylene-based polymer is an ethylene/octene copolymer.

Assignees

• Dow Global Technologies Llc

Inventors

• Lorenzo Arnaldo
• Bensason Selim
• Degroot Jacquelyn A

Classifications

• D04H3/16

  with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion · CPC title

• C08L23/06

  Polyethylene · CPC title

• D01D5/08

  Melt spinning methods {(D01D5/0023 takes precedence)} · CPC title

• D04H3/007

  Addition polymers · CPC title

• D01F6/46 Primary

  of polyolefins · CPC title