Fabric including polyolefin elastic fiber

Patent metadata

Field	Value
Publication number	US-10041190-B2
Application number	US-201414245051-A
Country	US
Kind code	B2
Filing date	Apr 4, 2014
Priority date	Dec 23, 2009
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

An article comprising a yarn comprising an elastomeric propylene-based polymer composition; said polymer composition comprising at least one elastomeric propylene-based polymer, wherein said yarn has a draft greater than 200%; wherein said article is a fabric or a garment.

First claim

The invention claimed is:

1. A method for preparing a fabric including an elastomeric propylene-based polymer yarn wherein said yarn has an elongation of 200-800%, a tenacity of about 0.5 to about 1.5 grams/denier, a load power at 200% elongation of about 0.05 to about 0.35 grams/denier; and an unload power at 200% elongation of about 0.007 to about 0.035 grams/denier, said method comprising
(a) providing an elastomeric propylene-based copolymer composition comprising propylene and at least one monomer selected from a C 4 -C 20 α-olefin, a combination of ethylene and at least one C 4 -C 20 α-olefin and one or more dienes;
(b) heating said elastomeric propylene-based polymer composition in a single extruder to a temperature of about 220° C. to about 300° C.;
(c) maintaining said elastomeric propylene-based polymer composition at a temperature of about 135° C. to about 275° C. while extruding said composition through a capillary to form the yarn;
(d) winding said yarn onto a package at a winding speed of about 450 m/min to about 650 m/min;
(e) preparing a fabric including said yarn by knitting or weaving under tension at a draft of greater than 200%, and
(f) crosslinking said yarn.

2. The method of claim 1 , wherein the crosslinking is effected by exposing the yarn to an ebeam.

3. The method of claim 2 , wherein said yarn is exposed to the ebeam prior to winding on said package.

4. The method of claim 2 , wherein said package is exposed to an ebeam as a single package or a plurality of packages in a container.

5. A method for preparing an apparel fabric including an elastomeric propylene-based polymer yarn wherein said yarn has an elongation of 200-800%, a tenacity of about 0.5 to about 1.5 grams/denier, a load power at 200% elongation of about 0.05 to about 0.35 grams/denier; and an unload power at 200% elongation of about 0.007 to about 0.035 grams/denier, said method comprising:
(a) providing an elastomeric propylene-based providing an elastomeric propylene-based copolymer composition comprising propylene and at least one monomer selected from a C 4 -C 20 α-olefin, a combination of ethylene and at least one C 4 -C 20 α-olefin and one or more dienes;
(b) heating said elastomeric propylene-based polymer composition in a single extruder to a temperature of about 220° C. to about 300° C.;
(c) maintaining said elastomeric propylene-based polymer composition at a temperature of about 135° C. to about 275° C. while extruding said composition through a capillary to form the yarn;
(d) winding said yarn onto a package at a winding speed of about 450 m/min to about 650 m/min;
(e) preparing a warp comprising a plurality of said yarns;
(f) exposing said yarns to an ebeam to crosslink said yarns;
(g) taking up the yarn on a beam; and
(h) warp knitting an apparel fabric under tension at a draft of greater than 200%.

Assignees

• Invista North America Sarl
• Invista North America Sarl

Inventors

• Waldbauer Jr Robert O
• Nguyen Young D
• Liu Hong
• Lambert James Michael

Classifications

• D01D5/08 Primary

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

• Y10T428/249921

  Web or sheet containing structurally defined element or component · CPC title

• D04B1/18

  elastic threads · CPC title

• D04B21/00

  Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes · CPC title

• D01D5/088

  Cooling filaments, threads or the like, leaving the spinnerettes · CPC title