Magnetic recording medium having improved running properties
US4539257A · kind A · utility
13Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1984 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Apr 13, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprised of a nonmagnetic support base having a magnetic layer provided thereon is disclosed. The magnetic layer includes ferromagnetic particles dispersed in a binder in combination with carbon black particles. The carbon black particles have an average primary particle size in the range of 30 m.mu. to 50 m.mu.. Further, the carbon black is capable of the adsorption of 120 ml or more of dibutyl phthalate per 100 g of carbon black. By utilizing the particular carbon black of the present invention it is possible to obtain a magnetic recording medium having improved running properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.