Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1988-10-24

1992-05-19

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428694, 428900, B32B 300

Patent

active

051147785

ABSTRACT:
A magnetic recording medium having improved running properties and electromagnetic characteristics is disclosed, which comprises a non-magnetic support having provided thereon an underlayer and a magnetic layer composed of a thin ferromagnetic metal film in that order, said underlayer being composed mainly of a high molecular weight compound having on the surface thereof an uneven orange peel texture, wherein said underlayer has an average surface area of a unit cell of the uneven orange peel texture of from 3.times.10.sup.-6 to 3.times.10.sup.-3 mm.sup.2, and has a surface roughness of from 0.1 to 0.01 .mu.m.

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patent: 4664964 (1987-05-01), Okita et al.
patent: 4670319 (1987-06-01), Katoh et al.
T. C. Patton, "Paint Flow and Pigment Dispersion," pp. 443-449, 109-115, published by Interscience Publishers (1966).

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