Cummerciat polyethylene terephthalate multifilament yarn was textured using the spindle false-twist method over a range of heater temperatures and contact times and at various tension and twist levels. The decrimping extension, initial modulus, tenacity, and fiber clongation of the various samples were measured on a tensile tester. The changes in these mechanical properties as functions of the texturing parameters are described and their structural dependence dis cussed in this paper.
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