Magnetic recording medium and process for production thereof

Details Magnetic recording medium and process for production thereof Magnetic recording medium and process for production thereof

1992-03-26

1994-07-05

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428212, 428213, 428323, 428329, 428694R, 428694B, 428694BB, 428694BN, 428694BA, 428694BM, 428694SL, 427127, 427128, 427130, 427132, B32B 310, B32B 702, B32B 516, G11B 566

Patent

active

053266188

ABSTRACT:
A magnetic recording medium is described comprising a nonmagnetic support having formed thereon a magnetic layer containing a ferromagnetic powder, an abrasive, and a binder, wherein the ferromagnetic powder is a metal magnetic powder having a crystallite size of not larger than 200 .ANG., the abrasive comprises (i) an inorganic powder having a Mohs' hardness of more than 9 and a mean particle size of 0.1 to 0.9 .mu.m which is contained in an amount of from 0.1 to 10 parts by weight per 100 parts by weight of the ferromagnetic powder, and a center-line average surface roughness (Ra) of the magnetic layer is less than 5 nm. The magnetic recording medium exhibits improved properties in C/N, running durability and drop-out. A process of producing the recording medium is also disclosed involving a calender treatment with at least one pair of metal rolls.

REFERENCES:
patent: 4624883 (1986-11-01), Yamaguchi et al.
patent: 4911997 (1990-03-01), Asai et al.
patent: 4959263 (1990-09-01), Aonuma et al.
patent: 4965120 (1990-10-01), Ono et al.
patent: 5051291 (1991-09-01), Kawahara et al.
patent: 5084343 (1992-01-01), Ogawa et al.
patent: 5089317 (1992-02-01), Noguchi et al.
patent: 5098773 (1992-03-01), Saito et al.
patent: 5132179 (1992-07-01), Hashimoto et al.
patent: 5156908 (1992-10-01), Araki et al.

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