Textiles: manufacturing – Thread finishing – Surface modification of running length
Reexamination Certificate
2005-04-12
2005-04-12
Vanatta, A. (Department: 3765)
Textiles: manufacturing
Thread finishing
Surface modification of running length
C028S220000, C028S206000, C028S281000, C264S168000
Reexamination Certificate
active
06877197
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%.
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Covelli Carmen A.
Gossler Jamie Lee
Mapp Clive
Marfell David J.
Van Trump James E.
Furr, Jr. Robert B.
Invista North America S.A.R.L.
Vanatta A.
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