Method for spinning a petroleum-origin mesophase
US4814121A · kind A · utility
12Cited by
18References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1983 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Dec 16, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing high strength, high modulus filament yarns of carbon fibers is provided by subjecting a mesophase-containing pitch to aging, separating (purifying) the resulting 100% mesophase and subjecting 100% mesophase to melt-spinning at 250.degree. to 350.degree. C. by using spinning nozzles having a greater cross-sectional area in the outlet part than the cross-sectional area in the narrowest inside the nozzles and further to thermosetting and carbonization whereby carbon fibers having a random (shape), turbulent flow shape or rather onion shape of carbon arrangement in cross-section are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.