US2011133011A1PendingUtilityA1

Multiend package of multifilament polyester bicomponent yarn

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Assignee: INVISTA NORTH AMERICA SARLPriority: Mar 20, 2008Filed: Mar 19, 2009Published: Jun 9, 2011
Est. expiryMar 20, 2028(~1.6 yrs left)· nominal 20-yr term from priority
Inventors:Kah Leap LeeYoung D. NguyenRaymond LeungPaul Wu
B65H 51/015B65H 54/026D02G 3/36B65H 2701/3132D01D 5/32D02G 3/362B65H 55/005D01F 8/14D02G 3/00D01D 5/34
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Claims

Abstract

Included are multiend packages of multicomponent yarns, where the yarn is separable into individual ends upon unwinding. The multicomponent yarn may be a bicomponent yarn, such as a yarn including compositionally different polyesters in a side-by-side or eccentric sheath-core configuration. Uses of such multiend packages are also included.

Claims

exact text as granted — not AI-modified
1 . A process for producing a multiend package, the process comprising:
 A) melt-spinning two or more compositionally different polyesters from a single pre-coalescent or post-coalescent spinneret to form multiple side-by-side or eccentric sheath-core polyester bicomponent filaments;   B) grouping the filaments into at least two threadlines, each threadline including more than one filaments;   C) taking up the threadlines at speeds greater than about 300 meters per minute;   D) interlacing each threadline;   E) combining the threadlines into a threadline bundle; and   F) winding the threadline bundle onto a tube core at speeds greater than about 300 meters per minute;   wherein the threadline bundle is separable into at least two individual threadlines and the bicomponent filament comprises poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination of such members.   
     
     
         2 . The process of  claim 1 , further comprising drawing the threadlines with a draw ratio greater than about 1.2 and winding the threadline bundle at speeds greater than about 420 meters per minute. 
     
     
         3 . The process of  claim 2 , further comprising heat-treating the threadlines at a temperature between about 100° C. and about 200° C. 
     
     
         4 . A process for producing a multiend package, the process comprising:
 A) melt-spinning two or more compositionally different polyesters from multiple pre-coalescent or post-coalescent spinnerets in a single spinning position to form multiple side-by-side or eccentric sheath-core polyester bicomponent filaments;   B) grouping the filaments into at least two threadlines, each threadline consisting of multiple filaments;   C) taking up the threadlines at speeds greater than about 300 meters per minute;   D) interlacing each threadline;   E) combining multiple groups of at least two threadlines into multiple threadline bundles; and   F) winding each threadline bundle onto a tube core using conventional multi-package winders;   wherein each threadline bundle is separable into at least two threadlines and the bicomponent filament comprises poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination of such members.   
     
     
         5 . The process of  claim 4 , further comprising drawing the threadlines with a draw ratio greater than about 1.2 and winding the threadline bundle at speeds greater than about 420 meters per minute. 
     
     
         6 . The process of  claim 5 , further comprising heat-treating the threadlines at a temperature between about 100° C. and about 200° C. 
     
     
         7 . A process for producing a multiend package, the process comprising
 A) forming at least two threadlines from two or more side-by-side or eccentric sheath-core polyester bicomponent filaments;   B) combining the threadlines into a threadline bundle; and   C) winding the threadline bundle onto a tube core;   wherein the threadline bundle is separable into at least two threadlines and the bicomponent filament comprises poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination of such members.   
     
     
         8 . The process of  claim 7 , wherein the package has dimensions appropriate for direct use in making core spun yarn. 
     
     
         9 . The process of  claim 8 , wherein the package has dimensions to fit the apparatus for core spinning spandex yarn. 
     
     
         10 . The process as in one of  claims 1 - 9 , wherein the bicomponent filament comprises poly(ethylene terephthalate) and poly(trimethylene terephthalate). 
     
     
         11 . The process as in one of  claims 1 - 9 , wherein the bicomponent filament comprises poly(trimethylene terephthalate) and poly(trimethylene terephthalate). 
     
     
         12 . The process as in one of  claims 1 - 9 , wherein the bicomponent filament comprises poly(trimethylene terephthalate) and poly(tetramethylene terephthalate). 
     
     
         13 . A threadline bundle comprising at least two threadlines, each threadline comprising multiple side-by-side or eccentric sheath-core polyester bicomponent filaments, wherein the threadline bundle is separable into at least two threadlines, and the bicomponent filament comprises poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination of such members. 
     
     
         14 . The threadline bundle of  claim 13 , wherein the filaments have a cross-section shape selected from the group consisting of round, oval, or snowman or a combination of such members. 
     
     
         15 . The threadline bundle of  claim 13 , wherein the filaments have a non-round cross-section shape. 
     
     
         16 . The threadline bundle of  claim 13 , wherein the denier of each threadline is between about 10 and about 300. 
     
     
         17 . The threadline bundle of  claim 13 , wherein the denier per filament is between about 0.50 and about 20. 
     
     
         18 . The threadline bundle of  claim 13 , wherein the threadline has a crimp potential of at least 30%. 
     
     
         19 . The threadline bundle of  claim 13 , wherein the bicomponent filament comprises poly(ethylene terephthalate) and poly(trimethylene terephthalate). 
     
     
         20 . The threadline bundle of  claim 13 , wherein the bicomponent filament comprises poly(trimethylene terephthalate) and poly(trimethylene terephthalate). 
     
     
         21 . The threadline bundle of  claim 13 , wherein the bicomponent filament comprises poly(trimethylene terephthalate) and poly(tetramethylene terephthalate). 
     
     
         22 . A multiend package comprising a threadline bundle wound onto a tube core, wherein the threadline bundle is separable into at least two threadlines, each threadline comprising multiple side-by-side or eccentric sheath-core polyester bicomponent filaments, and the bicomponent filament comprises poly(trimethylene terephthalate) and at least one polymer selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), and poly(tetramethylene terephthalate) or a combination of such members. 
     
     
         23 . The package of  claim 22 , wherein the package has dimensions appropriate for direct use in making core spun yarn. 
     
     
         24 . The multiend package of  claim 22  or  23  wherein the bicomponent filament comprises poly(ethylene terephthalate) and poly(trimethylene terephthalate). 
     
     
         25 . The multiend package of  claim 22  or  23 , wherein the bicomponent filament comprises poly(trimethylene terephthalate) and poly(trimethylene terephthalate). 
     
     
         26 . The multiend package of  claim 22  or  23 , wherein the bicomponent filament comprises poly(trimethylene terephthalate) and poly(tetramethylene terephthalate). 
     
     
         27 . The multiend package made by the process of  claim 1  or  4  or  7 . 
     
     
         28 . The threadline bundle of the multiend package made by the process of  claim 1  or  4  or  7 .

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