Patent · US Expired

Method for surface treatment of fibrous polyphenylene sulfide or polysulfone

US6280880A · kind A · utility

4Cited by

2References

5Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Rolf-Peter Schwoebel · Hösbach, DE
Harald Hoffmann · Much, DE

Key dates

Filing date	Jul 7, 2000
Grant date	Aug 28, 2001
Priority date	—
Expiry date	Jul 7, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/50
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method for surface treatment of a fibrous polyphenylene sulfide or polysulfone is based on the use of a gas mixture of 1 to 5% in volume of elemental fluorine, of nitrogen as carrier gas and of no more than 20% in volume elemental oxygen. The gas mixture affects the fibers until the total fluorine content in the fiber material is between 0.01 and 0.2 percent in weight. The fibers treated in this manner are particularly suited as separator material in electrochemical energy storage devices with an alkaline electrolyte.

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