Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1995-04-07

1998-03-17

Kiliman, Leszek

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428213, 428214, 428216, 428217, 428336, 428694B, 428694BS, 428694BN, 428694BM, 428694SL, 428694BB, 428694ST, 428900, 427128, 427131, 427132, G11B 566

Patent

active

057284547

ABSTRACT:
A magnetic recording medium comprising on a non-magnetic support having thereon, in this order, an adhesive layer comprising a polymer, an undercoating layer comprising an inorganic powder and a binder, and one or more upper magnetic layers each comprising at least a ferromagnetic powder and a binder, the thickness of the upper magnetic layer being in the range of 0.05 to 1.0 .mu.m, the thickness of the undercoating layer being in the range of 0.5 to 5.0 .mu.m, the total thickness of the magnetic recording medium is in the range of 4 to 10 .mu.m, the micro vickers hardness of the non-magnetic support being in the range of 75 to 100 kg/mm.sup.2, and the micro vickers hardness of the undercoating layer being in the range of 25 to 50 kg/mm.sup.2.

REFERENCES:
patent: 5340635 (1994-08-01), Isobe et al.
patent: 5364684 (1994-11-01), Sakamoto et al.

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