Patent · US Expired

Novel spinning method

US4902492A · kind A · utility

5Cited by

8References

4Claims

0Family size

Assignee

Rutgerswerke Aktiengesellschaft · DE

Inventors

Herbert Beneke · Castrop-Rauxel, DE
Gerd Collin · Duisburg, DE
Manfred Meinbreckse · Friedrichsdorf, DE
Gerhard Wilhelm · Ladenburg, DE

Key dates

Filing date	Oct 17, 1988
Grant date	Feb 20, 1990
Priority date	—
Expiry date	Oct 17, 2008

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01F9/15
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

In a process for the production of carbon fibers from high boiling bituminous substances in which a purified and polymerized concentrated carbon fiber precursor is spun into fibers which are oxidized and then carbonized and optionally graphitized, the improvement comprising adding to the carbon fiber precursor just before spinning 2 to 10% by weight of a solvent in which the precursor is insoluble or only slightly soluble under normal conditions and mixing the resulting mixture under hypercritical conditions for the solvent for at least 10 minutes without gas or solid inclusions formed in the fiber and neoformatgion of solids is prevented.

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