Process for producing carbon fabric
US4237109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Dec 11, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided is a process for producing a carbon fabric composed of carbon fibers having improved tensile strength and modulus of elasticity from a precursor fabric made of an acrylonitrile polymer fiber. The acrylonitrile polymer fiber used has a fusing temperature of at least 310.degree. C., contains not more than 0.1 wt. % of a residual solvent, and is prepared by a process wherein an acrylonitrile polymer comprised of at least 94 wt. % of acrylonitrile and not more than 6 wt. % of another comonomer and having an intrinsic viscosity of 1.4-2.3 is spun into filaments and then the filaments are stretched at a total stretching ratio of at least 6. The fiber of the fabric woven therefrom is treated with a transition metal-containing compound. The precursor fabric exhibits a free areal shrinkage of not more than 50% and has a weight per unit area falling within the specified range. The precursor fabric is heated in an oxidizing gas atmosphere at 200.degree.-400.degree. C. under conditions such that the fabric is permitted to shrink by at least 80% of the free areal shrinkage, and then, carbonized at at least 700.degree. C. in a non-oxidizing atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.