Apparatus for quenching melt-spun filaments
AssigneeE. I. Du Pont de Nemours and Company
InventorMunzer Makansi
Life of this patent
Estimating the term…
Abstract
An apparatus for melt-spinning and cross-flow quenching of synthetic organic polymer filaments is improved by incorporation of a tubular delayed quench assembly extending from the spinneret and projecting into the cross-flow quench chimney. The projecting portion of the assembly is foraminous. An improvement in filament decitex uniformity is achieved especially with fine filaments.
Claims7
An improved apparatus for producing synthetic organic polymer filaments, wherein molten polymer is extruded through spinneret orifices to form filaments which are forwarded to an elongated crossflow chimney wherein the filaments are quenched by a flow of air which is supplied through turbulence reducers from a plenum outlet that is substantially coextensive with one wall of the chimney and is directed substantially perpendicular to the paths of the filaments, the improvement for increasing the decitex uniformity of the melt extruded filaments comprising a tubular delayed quench assembly located immediately downstream of the spinneret, having a central passage through which the filaments are advanced from the spinneret into the cross-flow chimney and including a foraminous outlet portion which protrudes into the cross-flow chimney.
Dependencies are inferred from the claim text.