Magnetic recording medium and process for producing the same
AssigneeFuji Photo Film Co., Ltd.
InventorsHideyuki Kobayashi, Kazutaka Yamashita, Masayasu Sato
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Abstract
A magnetic recording medium comprising a substrate having provided thereon at least one intermediate layer essentially containing nonmagnetic powder and a binder and further having thereon a magnetic layer as an upper layer which essentially contains ferromagnetic powder and a binder, wherein the nonmagnetic powder in the intermediate layer is mainly acicular, and the acicular nonmagnetic powder has a coefficient of orientation (α) of 0 to 0.8 in the longitudinal direction in the surface thereof.
Claims11
A magnetic recording medium comprising a substrate having thereon at least one intermediate layer comprising nonmagnetic powder and a binder and further having thereon a magnetic layer as an upper layer which comprises ferromagnetic powder and a binder, wherein
- said medium has a total thickness of 7 μm or less,
- the nonmagnetic powder in said intermediate layer is mainly acicular, with an acicular ratio of 2 to 10, and the acicular nonmagnetic powder at the interface between the substrate and the intermediate layer has a coefficient of orientation (α) of 0 to 0.8 in the longitudinal direction,
- the intermediate layer is at least two times thicker than the magnetic layer, and
- said magnetic recording medium is a tape.
Dependencies are inferred from the claim text.