The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 2005
Filed:
Dec. 07, 2004
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;
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;
Invista North America S.a r.l., Wilmington, DE (US);
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%.