Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1986-09-26

1989-07-18

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

427131, 428694, 428900, G11B 564

Patent

active

048493058

ABSTRACT:
Herein disclosed is an improved magnetic recording medium which comprises a substrate, a magnetic recording layer, if necessary, a protective layer, an adhesion promoting layer and a lubricant layer, respectively applied or deposited on the substrate in the recited order.
The magnetic recording medium is characterized in that the difference T.sub.a -T.sub.1) between the specific surface tension T.sub.a of the adhesion promoting layer and the specific surface tension T.sub.1 of the lubricant layer is adjusted to -5 to 30 dyne/cm.
The magnetic recording layer according to the present invention is improved in that the lubricant layer is adhered strongly to the adhesion promoting layer so that the lubricant is hardly dissipated at the time of rotation of the magnetic recording medium. Thus the loss in the volume of the lubricant layer decreases. As a result, the properties of the magnetic recording medium such as durability and abrasion resistance are improved.

REFERENCES:
patent: 4152487 (1979-05-01), Yanagisawa
patent: 4307156 (1981-12-01), Yanagisawa
patent: 4390562 (1983-06-01), Yanagisawa
patent: 4529659 (1985-07-01), Hoshino
patent: 4583145 (1986-04-01), Monnich
patent: 4696845 (1987-09-01), Yanagisawa

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