Process for producing carbon fibers
US4073870A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Apr 1, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for producing carbon fibers which comprises feeding an inert gas into a vertical furnace at about 500 to about 1,000.degree. C. and into a transverse furnace at about 800 to about 2,000.degree. C. connected thereto so that the inert gas flows from the transverse furnace toward the bottom of the vertical furnace and then to the top of the vertical furnace, and feeding preoxidized fibers from the top of the vertical furnace to pass the fibers countercurrent to the inert gas flow through the two furnaces to thereby carbonize the fibers. Apparatus of the type shown in the drawing for the production of carbon fibers by the above process. Carbon fibers having good performance can be produced with good efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.