Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2006-08-15

2006-08-15

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Binder media

C428S840400

Reexamination Certificate

active

07090936

ABSTRACT:
The present invention provides a high recording density magnetic recording medium with excellent surface smoothness, as well as excellent electromagnetic conversion characteristics and durability. A magnetic recording medium comprising a lower non-magnetic layer containing at least a non-magnetic powder and a binder resin on a non-magnetic support, and an upper magnetic layer with a thickness of 0.2 μm or less on said lower non-magnetic layer, wherein said lower non-magnetic layer contains an acicular powder of hydrated iron oxide as the non-magnetic powder, and said lower non-magnetic layer contains a fatty acid and a fatty acid amide. Preferably the acicular powder of hydrated iron oxide is goethite with an average long axial length of 0.15 μm or less.

REFERENCES:
patent: 55-017813 (1980-02-01), None
patent: 56-10688 (1981-03-01), None
patent: 57-4967 (1982-01-01), None
patent: 1-25136 (1989-05-01), None
patent: 10-334450 (1998-12-01), None

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