Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1997-03-27

1998-07-21

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428328, 4284744, 428694BB, 428694SG, 428900, G11B 5704

Patent

active

057832960

ABSTRACT:
This invention concerns a magnetic recording medium which comprises a nonmagnetic support, a magnetic layer provided on one surface of the nonmagnetic support and a backcoat layer provided on the other surface of the nonmagnetic support, wherein the nonmagnetic support is provided with such physical properties as Young's moduluses in the longitudinal direction and the lateral direction thereof in the range of 1300-1600 kg/cm.sup.2, respectively, and a breaking elongation in the range of 3-10% and said magnetic recording medium is provided on the magnetic layer side thereof with a convex cupping the magnitude of which is in the range of 0.02-0.20 mm at a width of 3.8 mm.
The magnetic recording medium, therefore, realizes perfect head touch even when the thickness of the nonmagnetic support and the thickness of the whole medium are small. Even when the magnetic recording medium is exposed to the mechanical influences and physical influences of aging, it suffers extremely small change in the form (such as, for example, the cupping value) and therefore conserves the head touch and other factors in highly satisfactory state. It suffers occurrence of dropout or head stain only sparingly.

REFERENCES:
patent: 4917959 (1990-04-01), Kasanuki

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