Surface-treatment of carbon fiber
US4401533A · kind A · utility
7Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Mar 5, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2918
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing carbon fibers exhibiting excellent adhesive properties to resins and having high strength and heat-oxidation resistance, comprising electrically treating high strength carbon fiber in an aqueous solution of a sulfuric acid salt under conditions such that the current density is from about 0.05 to 0.5 A/m.sup.2 and the product of current density, voltage, and processing time is from about 0.02 to 8 A-V-min/m.sup.2, while continuously moving the carbon fiber as an anode in the aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.