Patent · US Expired

Polyether imide fibers

US4943481A · kind A · utility

9Cited by

6References

3Claims

0Family size

Assignee

Akzo N.V. · NL

Inventors

Diederich Schilo · Klingenberg, DE
Willi Birkenfeld · Obernburg, DE

Key dates

Filing date	May 23, 1988
Grant date	Jul 24, 1990
Priority date	—
Expiry date	May 23, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2931
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Melt-spun polyether imide fibers are disclosed wherein the granules are brought to a moisture content of below 0.05%, the melt is extruded from nozzles at a temperature between 300.degree. and 440.degree. C., and the spun fibers are taken up at a speed of up to 2,500 m/min. Fibers produced in this fashion can be stretched up to 1:3 and spin-dyed.

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