Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1979-02-02

1982-02-23

Silverman, Stanley S.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428329, 428336, 428337, 428694, 428695, 428900, 428910, 427129, 360134, G11B 568

Patent

active

043169279

ABSTRACT:
In a magnetic recording medium comprising a flexible non-magnetic base and a magnetic layer carried by the base, composed of magnetic powder dispersed in a resinous binder, wherein the flexible non-magnetic base has a Young's modulus not less than 350 Kg/mm.sup.2 in the longitudinal direction and a Young's modulus not less than 500 Kg/mm.sup.2 in the direction transverse to the longitudinal direction, and a thickness from 6 to 14 microns, a ratio of the Young's modulus of the base in the longitudinal direction to the Young's modulus of the base in the direction transverse to the longitudinal direction is from 0.5 to 0.9, the magnetic layer has a Young's modulus from 700 to 1400 Kg/mm.sup.2 in the longitudinal direction and a Young's modulus from 400 to 1100 Kg/mm.sup.2 in the direction transverse to the longitudinal direction, and a thickness from 2 to 5 microns, a ratio of the Young's modulus of the magnetic layer in the longitudinal direction to the Young's modulus of the magnetic layer in the direction transverse to the longitudinal direction is from 1.3 to 1.9.

REFERENCES:
patent: 3432591 (1969-03-01), Heffelfinger
patent: 3901851 (1975-08-01), Kohno et al.
patent: 4187341 (1980-02-01), Suzuki et al.
patent: 4202927 (1980-05-01), Yamaguchi et al.

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