Magnetic recording medium and preparation
US4759954A · kind A · utility
5Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249955
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic recording medium comprising a substrate and a magnetic layer thereon, the magnetic layer is formed by coating a composition of a binder, preferably radiation-curable binder and a needle magnetic material, passing the coating through a magnetic field to forcedly re-orient the magnetic particles to form pores having an average pore area of 6.times.10.sup.-5 to 7.times.10.sup.-1 .mu.m.sup.2, and curing the coating, thereby minimizing output fluctuation and improving durability. Preferably lubricant is present in the pores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.