Patent · US Expired

Process for preparing polyester fine filaments

US5407621A · kind A · utility

5Cited by

7References

11Claims

0Family size

Assignee

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

Inventors

Robert J. Collins · Wilmington, US
Hans R. E. Frankfort · Greenville, US
Stephen B. Johnson · Wilmington, US
Benjamin H. Knox · Wilmington, US
Elmer E. Most, Jr. · Kinston, US

Key dates

Filing date	Sep 17, 1993
Grant date	Apr 18, 1995
Priority date	—
Expiry date	Sep 17, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S57/908
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Polyester fine filaments 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 viscosity and spinning conditions, followed by drawing and/or bulking.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.