Patent · US Expired

Process of making fine polyester hollow filaments

US5487859A · kind A · utility

3Cited by

3References

18Claims

0Family size

Assignee

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

Inventors

Arun Aneja · Greenville, US
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
Elmer E. Most, Jr. · Kinston, US

Key dates

Filing date	Mar 16, 1994
Grant date	Jan 30, 1996
Priority date	—
Expiry date	Mar 16, 2014

Classification

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

Abstract

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.

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