Method for producing high strength, high modulus mesophase-pitch based carbon fibers
US4898723A · kind A · utility
8Cited by
10References
1Claims
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Key dates
| Filing date | Jun 3, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Jun 3, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing mesophase pitch based carbon fibers which enables to produce high strength high modulus carbon fibers at a relatively low temperature with stabilized production manner. This method comprises carbonizing infusibilized fibers, in an inert atmosphere under no tension state or a tension of 1 mg/denier or less in the first stage to give a specified interlayer spacing and a crystallite thickness and then carbonizing under a tension of 50-300 mg/denier at a temperature of 2600.degree. C. or more in the second stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.