Process of making polyester mixed yarns with fine filaments

US5417902A · kind A · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• David George Bennie · Castle Hayne, US
• Robert J. Collins · Wilmington, US
• Hans R. E. Frankfort · Greenville, US
• Stephen B. Johnson · Wilmington, US
• Benjamin H. Knox · Wilmington, US
• Joe Forrest London, Jr. · Greensboro, US
• Elmer E. Most, Jr. · Kinston, US
• Girish Anant Pai · Matthews, US

Key dates

• Filing date: Jul 23, 1993
• Grant date: May 23, 1995
• Expiry date: Jul 23, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S57/908
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

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.