Magnetic recording member

Details Magnetic recording member Magnetic recording member

1975-08-28

1978-01-31

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

360134, 427129, 428337, 428339, 428409, 428539, 428900, G11B 578

Patent

active

040716546

ABSTRACT:
A magnetic recording material comprising a non-magnetic flexible support having thereon a magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, the surface of the non-magnetic flexible support having the magnetic recording layer thereon satisfying an S-factor expressed by the following relationship (I-1) ##EQU1## wherein S.sub.1 is the surface roughness in .mu.m of the surface of the non-magnetic flexible support having the magnetic recording layer thereon and d is the thickness in .mu.m of the magnetic recording layer, with the thickness (d) of the magnetic recording layer being about 5 .mu.m or less, and the back surface of the non-magnetic flexible support opposite that having the magnetic recording layer thereon satisfying an S-factor expressed by the following relationship (I-2) ##EQU2## wherein S.sub.2 is the surface roughness in .mu.m of the back surface of the non-magnetic support opposite that having the magnetic recording layer thereon and d is as described above.

REFERENCES:
patent: 3255307 (1966-06-01), Schuller
patent: 3442683 (1969-05-01), Lenoble et al.
patent: 3734772 (1973-05-01), Schnell et al.
patent: 3881046 (1975-04-01), Akashi et al.
patent: 3922439 (1975-11-01), Hartmann et al.
patent: 3967025 (1976-06-01), Tanabe et al.

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