Magnetic recording medium and preparation

Details Magnetic recording medium and preparation Magnetic recording medium and preparation

1986-12-08

1988-07-26

Thibodeau, Paul J.

Coating processes

Magnetic base or coating

Magnetic coating

427 48, 427130, 4273722, 4283044, 4283066, 428694, 428695, 428900, G11B 570, G11B 582

Patent

active

047599545

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.

REFERENCES:
patent: 4091158 (1978-12-01), Kasuga et al.
patent: 4163823 (1979-08-01), Legras et al.
patent: 4450199 (1984-05-01), Tadokoro et al.
patent: 4546035 (1985-10-01), Ko et al.
patent: 4567096 (1986-01-01), Piltingsrud et al.
patent: 4626463 (1986-12-01), Fujishiro et al.

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