Jamie Lee Gossler

US Patent:

6974628, Dec 13, 2005

Filed:

Dec 7, 2004

Appl. No.:

11/006253

Inventors:

James E. Van Trump - Wilmington DE, US
Carmen A. Covelli - Chadds Ford PA, US
Jamie Lee Gossler - Wilmington DE, US
David J. Marfell - Moreton-In-Marsh, GB
Clive Mapp - Gloucester, GB

Assignee:

Invista North America S.a r.l. - Wilmington DE

International Classification:

D01F008/00

US Classification:

428370, 428373, 428374

Abstract:

The invention provides a process for treating a polyester fiber comprising the steps of providing a bicomponent fiber comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) which has been heat-treated at a first temperature and cooled to lower than about 70 C. and has an initial crimp contraction value and a developed crimp contraction value, applying tension to the fiber of about 0. 001 to 0. 088 dN/tex, heat-treating the fiber at a second heat-treating temperature no lower than about 75 C. and no higher than the first heat-treating temperature, cooling the fiber to lower than the second heat-treating temperature, and releasing the tension from the fiber to give a fiber having a reduced crimp contraction value. The invention also provides a bicomponent fiber comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) having a reduced crimp contraction value of about 6% to 15%.

US Patent:

6877197, Apr 12, 2005

Filed:

Dec 8, 2003

Appl. No.:

10/730372

Inventors:

James E. Van Trump - Wilmington DE, US
Carmen A. Covelli - Chadds Ford PA, US
Jamie Lee Gossler - Wilmington DE, US
Clive Mapp - Gloucester, GB
David J. Marfell - Moreton-in-Marsh, GB

Assignee:

Invista North America S.A.R.L. - Wilmington DE

International Classification:

D02G001/00
D01D005/22

US Classification:

28247, 28220, 28 28, 28281, 264168

Abstract:

The invention provides a process for treating a polyester fiber comprising the steps of providing a bicomponent fiber comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) which has been heat-treated at a first temperature and cooled to lower than about 70 C. and has an initial crimp contraction value and a developed crimp contraction value, applying tension to the fiber of about 0. 001 to 0. 088 dN/tex, heat-treating the fiber at a second heat-treating temperature no lower than about 75 C. and no higher than the first heat-treating temperature, cooling the fiber to lower than the second heat-treating temperature, and releasing the tension from the fiber to give a fiber having a reduced crimp contraction value. The invention also provides a bicomponent fiber comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) having a reduced crimp contraction value of about 6% to 15%.