Magnetic recording medium in which certain physical properties o

Details Magnetic recording medium in which certain physical properties o Magnetic recording medium in which certain physical properties o

1990-01-17

1991-11-05

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428409, 4284228, 4284246, 428694, 428900, G11B 2300

Patent

active

050631055

ABSTRACT:
A magnetic recording medium comprising a nonmagnetic support having formed thereon a magnetic layer containing a ferromagnetic fine powder, a binder, and carbon black and formed on the opposite side of the nonmagnetic support to the magnetic layer-carrying side a backing layer containing a binder and carbon black, wherein (i) the Young's modulus of the magnetic layer is from 600 to 1100 kg/mm.sup.2 and the Young's modulus of the backing layer is from 200 to 400 kg/mm.sup.2, or (ii) the surface free energy of the backing layer is at least 1 dyn/cm higher than the surface free energy of the magnetic layer, the gloss of the magnetic layer is at least 150, and the gloss of the backing layer is from 2 to 7.

REFERENCES:
patent: 4555443 (1985-11-01), Kikugawa et al.
patent: 4649072 (1987-03-01), Ryoke et al.
patent: 4684572 (1987-08-01), Yasufuku et al.

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