E.i. Dupont De Nemours and Company

Girish Anant Pai

Benjamin H Knox

Hans R Frankfort

Stephen B Johnson

Joe Forrest London, Jr

Robert J Collins

Elmer E Most, Jr

David George Bennie

Hans Rudolf Frankfort

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

Polyester filaments of high shrinkage and high shrinkage tension may be prepared by heat treatment of undrawn crystalline filaments of low shrinkage and shrinkage tension, and may be used for making polyester yarns of mixed shrinkage and bulky polyester yarns and fabrics therefrom.

Continuous filaments, yarns, and tows

Process of making spin-oriented, biconstituent filaments

Process of making polyester mixed yarns with fine filaments

Process of making spin-oriented polyester filaments

Growing community of inventors

Matthews, NC, United States of America

Girish Anant Pai