Process for producing graphite films and fibers
US4915984A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jun 7, 1988 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Jun 7, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing almost perfect graphite films and fibers at lower graphization temperatures wherein a film or fiber of a polymer selected from a defined group is subjected to a preliminary heat treatment at a temperature of 400.degree. to 700.degree. C., under tension, in vacuo or in an inert gas, and then heat treating the film or fiber at a temperature of at least 1600.degree. C. in vacuo or in an inert gas, to graphitize the film or fiber. The process can be modified to produce graphite films having excellent electric conductivity and mechanical properties, by heat treating a polymer selected from a second defined group at a temperature of at least 1800.degree. C. in vacuo or in an inert gas, impregnating the film with a binder component, and then heat treating the impregnated film at a temperature of not more than 1400.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.