Magnetic recording medium having a magnetic layer containing two

Details Magnetic recording medium having a magnetic layer containing two Magnetic recording medium having a magnetic layer containing two

1994-01-21

1995-04-18

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428323, 428402, 428408, 428694BN, 428694BB, 428694BR, 428900, G11B 500

Patent

active

054077257

ABSTRACT:
A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer comprising a ferromagnetic powder and a binder resin is disclosed. The magnetic layer contains a first carbon black having a DBP absorption of from 40 to 120 ml/100 g and a second carbon black having a DBP absorption of from 140 to 200 ml/100 g. Both carbon black have an average particle size of from 5 to 35 m.mu.. The medium maintains a high output level and has excellent running stability. Therefore, the dropout due to abrasion caused by an increase in friction coefficient and output reduction due to head clogging, can be avoided.

REFERENCES:
patent: 4654258 (1987-03-01), Kawamata et al.
patent: 4774147 (1988-09-01), Kuse et al.
patent: 4812358 (1989-03-01), Miyake et al.
patent: 4818606 (1989-04-01), Koyama et al.
patent: 4988562 (1991-01-01), Ryoke et al.

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