Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1998-01-27

2000-06-20

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428323, 428694BP, 428694BS, 428900, G11B 5738

Patent

active

060775955

ABSTRACT:
The present invention provides a magnetic recording medium having a preferable electro-magnetic conversion characteristic, while suppressing the self magnetization loss during recording and the thickness loss during reproduction and reducing the surface friction coefficient, which in turn improves the abrasion resistance, running condition, and durability.
The magnetic recording medium includes a non-magnetic support body, a non-magnetic layer containing at least a non-magnetic powder dispersed in a binder and formed on the non-magnetic support body, and one or more than one magnetic layers containing ferromagnetic powder dispersed in a binder, wherein the non-magnetic layer contains fatty acid and a magnetic layer serving as the uppermost layer contains alkyl carboxylic acid dimethyl amino alkyl ester. It is preferable that the non-magnetic layer contain 0.05 to 5 weight parts of fatty acid for 100 weight parts of the non-magnetic powder, and the magnetic layer serving as the uppermost layer contain 0.05 to 5 weight parts of alkyl carboxylic acid dimethyl amino alkyl ester for 100 weight parts of the ferromagnetic powder.

REFERENCES:
patent: 4587157 (1986-05-01), Brock et al.
patent: 5756198 (1998-05-01), Tanaka
patent: 5776596 (1998-07-01), Yamazaki et al.

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