Patent · US Active

Method for the production of lignin-containing precursor fibres and also carbon fibres

US9631298B2 · kind B2 · utility

1Cited by

6References

31Claims

0Family size

Assignee

Stora Enso OYJ · FI

Inventors

André Lehmann · Potsdam, DE
Horst Ebeling · Premnitz, DE
Hans-Peter Fink · Teltow, DE

Key dates

Filing date	May 16, 2012
Grant date	Apr 25, 2017
Priority date	—
Expiry date	Jun 28, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2031/731
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a method for the production of a precursor for the production of carbon—and activated carbon fibers according to the wet—or air-gap spinning method, in which a solution of lignin and a fiber-forming polymer in a suitable solvent is extruded through the holes of a spinning nozzle into a coagulation bath, the formed thread is stretched and subsequently treated, dried at an elevated temperature and then wound up. The lignin-containing thread is an economical starting material for the production of carbon—and activated carbon fibers.

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