Ultra-thin pure flexible graphite calendered sheet and method of manufacture
US5149518A · kind A · utility
37Cited by
15References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1990 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Aug 30, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/536
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for forming pinhole free ultra-thin flexible sheet material from natural graphite comprising treating low ash natural graphite particles with an oxidizing agent to intercalate the graphite, introducing the particles after they are dried to less than 2% by weight water into a furnace preheated to at least 2000.degree. F. to cause rapid expansion to a specific volume of at least 800 cc/gm and compressing the expanded graphite to below 8 mils in thickness with a density of less than 1.3 g/cc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.