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US 6,686,024 B2Granted
Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsMikio Ohno, Naoto Murao, Toshichika Aoki, Hiroaki Araki
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AssigneeFuji Photo Film Co., Ltd.
InventorsMikio Ohno, Naoto Murao, Toshichika Aoki, Hiroaki Araki
Estimating the term…
A magnetic recording medium is formed from a non-magnetic support, and a magnetic layer formed on the support and including mainly a binder resin and a ferromagnetic metal powder including mainly Fe. The magnetic layer includes an abrasive and a lubricant. The abrasive present on the surface of the magnetic layer satisfies the relationship 0.01≦H15/H10≦0.3 where H10 denotes the number of particles per unit area having a height less than 10 nm (particles/μm2) and H5 denotes the number of particles per unit area having a height equal to or greater than 15 nm (particles/μm2). The magnetic recording medium has a surface lubricant index of 3 to 11. The height of the abrasive particles can be controlled by, for example, a blade treatment using an abrasive tape (LTBL system) or a diamond powder-studded rotating roll (DWBL system).
A magnetic recording medium comprising a non-magnetic support, and a magnetic layer formed on the support and comprising a binder resin and a ferromagnetic metal powder comprising Fe, said magnetic layer comprising an abrasive and a lubricant, the abrasive present on the surface of the magnetic layer satisfying the relationship below and the magnetic recording medium having a surface lubricant index of 3 to 11;
Dependencies are inferred from the claim text.