E.i. Dupont De Nemours and Company

David George Bennie

Benjamin H Knox

Hans R Frankfort

Stephen B Johnson

Robert J Collins

Elmer E Most, Jr

Joe Forrest London, Jr

Girish Anant Pai

Arun Pal Aneja

A direct melt spinning process for providing high filament count fine filament polyester yarns having excellent mechanical quality and along-end uniformity and unitary interlace by spinning all the filaments of such high filament count yarn from a single spinneret. Such yarns may be used as direct-use yarns and as draw-feed yarns for preparing drawn flat yarns and draw-textured yarns.

Making high filament count fine filament polyester yarns

High filament count fine filament polyester yarns

Polyester mixed fine filament yarns having excellent mechanical quality and uniformity, and preferably with a balance of good dyeability and shrinkage, are prepared by a simplified direct spin-orientation process by selection of polymer and spinning conditions.

Polyester mixed yarns with fine filaments

A post-coalescence melt-spinning process for preparing fine undrawn hollow polyester filaments having excellent mechanical quality and uniformity at high speeds (2-5 km/min) involving selection of polymer viscosity and spinning conditions, whereby the void content of the resulting new undrawn filaments is essentially maintained or increased on cold-drawing or hot-drawing with or without post heat treatment, and the new fine hollow polyester filaments obtained thereby.

Process for polyester fine hollow filaments

Process of making fine polyester hollow filaments

Process of making polyester mixed yarns with fine filaments

Growing community of inventors

Rocky Point, NC, United States of America

David George Bennie