Process for producing anti-static yarns
AssigneeE. I. Du Pont de Nemours and Company
InventorPerry H. Lin
Life of this patent
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Abstract
A process wherein freshly-spun, undrawn, nonconductive filaments are combined with one or more spin-oriented, conductive filaments having a nonconductive component made from a major portion of nonconductive, fiber-forming polymeric material and a minor amount of polystyrene, the combined fibers being drawn and co-bulked to produce an anti-static yarn. The conductive filaments used in this process have higher elongations to break, and carpets tufted from the yarns of the process show improved anti-static properties.
Claims8
In a process for producing anti-static yarns by the steps of combining at least one spin-oriented, conductive filament spun at 1400 yards per minute or greater, said filament having a nonconductive polymeric component coextensive with a component of electrically conductive carbon dispersed in a polymeric matrix with freshly spun, undrawn, nonconductive filaments, drawing and cobulking the combined filaments to form a yarn, the improvement for reducing the tendency of the conductive filaments to break during drawing wherein the nonconductive polymeric component of the spin-oriented, conductive filaments is a melt-blend containing a major amount of a nonconductive, fiber-forming polymeric material and a minor amount of a polystyrene.
Dependencies are inferred from the claim text.