Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-02-11

1989-10-03

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

360134, 360135, 427 44, 427122, 427131, 428141, 428143, 428323, 428329, 428330, 428331, 4284259, 428522, 428523, 428694, 428900, G11B 572

Patent

active

048716065

ABSTRACT:
A magnetic recording medium having high running stability and good magnetic characteristics without causing an abrasion problem, which comprises a base film, a magnetic layer provided on one surface (i.e. the major surface) of the base film and a back coat layer provided on the other surface (i.e. the back surface) of the base film, the back coat layer comprising a binder and non-magnetic particles dispersed therein, characterized in that the non-magnetic particles comprise at least one soft inorganic pigment having a hardness of less than 5 in Mohs' scale of hardness and at least one hard inorganic pigment of not less than 5 in Mohs' scale of hardness and of not more than 0.2 .mu.m in average particle size in a weight ratio of the soft pigment to the hard pigment of 99:1 to 50:50.

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