Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorNoriko Inoue
Life of this patent
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Abstract
A magnetic recording medium comprising: a magnetic layer comprising a ferromagnetic powder and a binder; a non-magnetic support; and a backcoating layer comprising a non-magnetic powder and a binder, in this order, wherein the backcoating layer comprises 0.3 to 5% by weight of at least one of a fatty acid having 10 to 26 carbon atoms and an ester thereof, the backcoating layer has projections having a height of 100 nm or smaller as measured with an atomic force microscope, and a density of projections on the backcoating layer which have a height of 25 to 100 nm as measured with an atomic force microscope is 1000 or fewer per 90 μm side square.
Claims14
A magnetic recording medium comprising:
- a magnetic layer comprising a ferromagnetic powder and a binder;
- a non-magnetic support;
- and
- a backcoating layer comprising a non-magnetic powder and a binder, in this order,
- wherein the backcoating layer comprises 0.3 to 5% by weight of at least one of a fatty acid having 10 to 26 carbon atoms and an ester thereof, the backcoating layer has projections having a height of 100 nm or smaller as measured with an atomic force microscope, and a density of projections on the backcoating layer which have a height of 25 to 100 nm as measured with an atomic force microscope is 1000 or fewer per 90 μm side square.
Dependencies are inferred from the claim text.