E.i. Dupont De Nemours and Company

Charles Wesley Starke

Don Mayo Coates

Tom Edward Estep

Hyunkook Shin

Larry Ray Marshall

Michael Allen Bryner

Ashok H Shah

Arthur William Etchells

James Ross Waggoner

Ralph A Franke

Edgar W Slocum

Michael Charles Davis

Andrew Paul Rose

Subhra K Nath

Plexifilamentary strand of blended polymers

A mixing apparatus for continuously generating a homogeneous mixture of a polymer and a less viscous fluid is provided. The mixer includes means for continuously injecting a viscous polymer into a pressure vessel; means for continuously injecting a lower viscosity fluid into the pressure vessel; means for continuously injecting a plasticizing agent into the viscous polymer entering the pressure vessel; high shear centrifugal mixing means within the pressure vessel for mixing the polymer and the less viscous fluid; drive means for rotating the rotational mixing means; heating means for maintaining the temperature of the substances being mixed in the pressure vessel at a desired mixing temperature; and means for continuously discharging a homogeneous mixture of the polymer, the plasticizing agent, and the less viscous fluid from the mixer.

Process and apparatus for mechanically mixing polymers and lower

A flash spin pack for a flash-spinning apparatus is provided in which the pack includes a spin mixture inlet, that communicates with a spin mixture passage, that discharges through a spinning orifice that opens into a slot defined by two opposing faces of the body of the spin pack. The slot is 0.25 mm to 7 mm wide proximate the spinning orifice outlet, 0.25 mm to 10 mm at the slot outlet, and the distance from the orifice outlet to the slot outlet is 1.5 mm to 40 mm. The spin pack may have five or more spinning orifices that each discharge into a different slot so configured.

Spinneret with slotted outlet

Growing community of inventors

Richmond, VA, United States of America

Charles Wesley Starke