Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsHiroo Inaba, Toshiharu Takeda, Noburo Hibino
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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.
Claims19
A magnetic recording medium, comprising 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 magnetic layers each comprising a ferromagnetic powder and a binder,
- the thickness of said upper magnetic layer being in the range of 0.05 to 1.0 .mu.m, the thickness of said undercoating layer being in the range of 0.5 to 5.0 .mu.m, the total thickness of said magnetic recording medium being in the range of 4 to 10 .mu.m, the micro vickers hardness of said non-magnetic support being in the range of 75 to 100 kg/mm.sup.2, and the micro vickers hardness of said undercoating layer being in the range of 25 to 50 kg/mm.sup.2.
Dependencies are inferred from the claim text.