Multielectrolyte shear treatment of carbon fibers
US4729820A · kind A · utility
4Cited by
1References
9Claims
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Key dates
| Filing date | Feb 11, 1987 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Feb 11, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F11/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Carbon fibers subjected to an electrolytic treatment in an oxidizer bath followed by electrolytic treatment in an ammonium bath have surface elemental content of oxygen greater than 7% and nitrogen greater than 4%. Composites based on the carbon fiber in combination with bis-maleimide type matrix resins have improved toughness and interfacial bonding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.