Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1998-02-13

1999-11-23

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428216, 428328, 428329, 428336, 428694BB, 428694BR, 428694BS, 428900, G11B 568

Patent

active

059896809

ABSTRACT:
A magnetic recording medium having a nonmagnetic polymer substrate, a magnetic layer and a backcoating layer, wherein surface profile of the magnetic and the backcoating layers satisfies the following condition (i), and the nonmagnetic polymer substrate satisfies the following conditions (ii) and (iii): (i) the skewness of the surface roughness profiled of the backcoating layer is greater than that of the magnetic layer; (ii) the nonmagnetic polymer substrate has a molecular orientation ratio of 1.11 or greater; and (iii) the angle between the main axial direction of the polymer chains in the nonmagnetic polymer substrate and the longitudinal direction of the nonmagnetic polymer substrate is 7.degree. or smaller, has excellent electromagnetic conversion characteristics and running stability.

REFERENCES:
patent: 5547772 (1996-08-01), Saito et al.

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