Method for producing graphite film, method for rewinding same, and method for producing graphite composite film and graphite die-cutting product
US9249024B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2011 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | May 28, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9638
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.