Back to results
US 4,612,150 AGranted
Process for combining and codrawing antistatic filaments with undrawn nylon filaments
AssigneeE. I. Du Pont de Nemours and Company
InventorJack R. De Howitt
Life of this patent
Estimating the term…
Abstract
Electrically conductive and nonconductive filaments are combined in a quench chimney and then codrawn and cobulked prior to wind-up.
Claims4
A process for producing a carpet yarn with reduced static propensity comprising melt spinning a plurality of nonconductive nylon filaments into a quench chimney, pneumatically introducing spin-oriented electrically conductive bicomponent filaments into the freshly spun threadline within the quench chimney, consolidating the combined yarn at a puller roll, drawing and cobulking the combined yarn and then winding up the yarn.
Dependencies are inferred from the claim text.