Bicomponent yarn with improved bulk and hand-feel and elastic fabrics including the bicomponent yarn
OwnerGeoffrey David HIETPAS, Paul WUinventors
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Abstract
The invention includes fabrics and yarns including polyester bicomponent multifilament yarns. The bicomponent polyester yarn is made from polyethylene terephthalate and polytrimethylene terephthalate in a side by side or eccentric sheath core configuration. The yarns have an improved bulk and provide a more desirable hand-feel in fabrics compared to traditional polyester bicomponent yarns.
Claims19
An elastic fabric including a bicomponent multifilament yarn having at least a first bicomponent filament and a second bicomponent filament, wherein said first filament and said second filament are independently selected and differ in at least one of the following ways:
- (a) denier per filament;
- (b) ratio of a first component of said filament to a second component of said filament;
- (c) cross-section;
- and (d) combinations thereof.
A bicomponent multifilament yarn having at least a first bicomponent filament and a second bicomponent filament, wherein said first filament and said second filament are independently selected and differ in at least one of the following ways:
- (a) denier per filament;
- (b) ratio of a first component of said filament to a second component of said filament;
- (c) cross-section;
- and (d) combinations thereof.
A method for preparing a bicomponent multifilament yarn having at least a first bicomponent filament and a second bicomponent filament, wherein said first filament and said second filament differ in at least one of the following ways:
- (a) denier per filament;
- (b) ratio of a first component of said filament to a second component of said filament;
- (c) cross-section;
- and (d) combinations thereof, comprising extruding a polymer including a first component and second component for each filament through separate holes in a spinneret;
- wherein (a) said holes differ in size;
- (b) said holes differ in cross-section;
- (c) within each of said holes, said first component and second component have different ratios;
- and (d) combinations thereof.
A method for preparing a bicomponent multifilament yarn wherein a first bicomponent filament is prepared by selecting one of more characteristics of (a) denier per filament;
- (b) ratio of a first component of said filament to a second component of said filament;
- (c) cross-section;
- and (d) combinations thereof;
- and a second bicomponent filament is prepared using one or more characteristics of (a) denier per filament;
- (b) ratio of a first component of said filament to a second component of said filament;
- (c) cross-section;
- and (d) combinations thereof;
- wherein both first and second bicomponent multifilament yarns are combined in to a single multifilament yarn by entangling, twisting, or air-jet texturing process.
A bicomponent multifilament yarn comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) wherein the bicomponent filaments have a substantially oval cross-section shape having an aspect ratio A:B of about 2:1 to about 5:1 wherein A is a fiber cross-section major axis length and B is a fiber cross-section minor axis length, a polymer interface substantially perpendicular to the major axis, a cross-section configuration selected from the group consisting of side-by-side and eccentric sheath-core.
An elastic fabric including a bicomponent multifilament yarn including 2GT/3GT wherein the crimp potential is about 40% to about 70% and the crimp shrinkage is about 0.5% to about 8%.
An elastic fabric including a bicomponent multifilament yarn including 2GT/3GT wherein the crimp potential is about less than 60% and the crimp shrinkage is about 0.5% to about 6%.
Dependencies are inferred from the claim text.