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Polyester fiber tow having substantially uniform primary and secondary crimps

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By: Karen McIntyre

Editor, Nonwovens Industry

This patent is for a polyester fiber tow made up of crimped polyester fibers that have substantially uniform primary crimps and substantially uniform secondary crimps. Each uniform secondary crimp includes a number of substantially uniform primary crimps. Each crimped polyester fiber possesses a tensile strenght about the same as the tensile factor possessed by an otherwise identical uncrimped polyester fiber. The average coefficient of primary crimp non-uniformity (Kn) possessed by the polyester fiber tow is less than about 10.8 percent.

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