Magnetic recording medium
US4663217A · kind A · utility
4Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Aug 19, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprised of a nonmagnetic support base having a magnetic recording layer on one surface thereof and a backing layer on the other surface thereof is disclosed. The backing layer is comprised of (1) carbon black having a particle size in the range of 10 to 150 m.mu., (2) graphite having a particle size of 3.mu. or less, and (3) a curing agent. By utilizing this particular backing layer the resulting recording medium has improved durability with respect to the backing layer and shows a decreased in the number of dropouts and scratches during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.