TWO STEP DYEING PROCESS FOR PROTECTIVE YARNS AND TEXTILES MADE FROM HIGH TENACITY FIBERS
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United States of America Patent
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Oct 1, 2015
app pub date -
Mar 11, 2014
filing date -
Mar 13, 2013
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Abstract
The present invention is a method for coloring knit, woven, or non-woven protective textiles made from yarns containing at least 20% synthetic high tenacity fibers, such as para-aramid or liquid crystal polyester (“LCP”), and for package-dyeing and skein-dyeing of such yarns. In embodiments, the textile is scoured to remove any impurities. A base coating of an adhesion promoting primer is then applied, which is typically a polymer or elastomer. The textile is typically immersed at zero tension in the primer liquor for an extended period. Afterward, the primer is dried and then cured at an elevated temperature to cross-link the primer and provide wash-fastness. A dye or printing ink of substantially any desired color and intensity is then applied. The protective yarns can include staple fibers and/or continuous filament fibers. The invention is further applicable to drum coating, jig processing, dye beck and other dying and coating processes.
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