Magnetic disk and method of making same

Details Magnetic disk and method of making same Magnetic disk and method of making same

1985-10-24

1987-12-01

Robinson, Ellis P.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6254, 427128, 427131, 428328, 428329, 428336, 428404, 428405, 428407, 428331, 428694, 428900, 428422, G11B 5708

Patent

active

047104244

ABSTRACT:
The magnetic disk contains on a disk substrate a magnetic layer comprising a binder, magnetic particles and abrasion-resistant particles, the abrasion-resistant particles being enveloped with a layer intensifying the bond between binder and abrasion-resistant particles. The enveloping layer either has a large specific surface and consists e.g. of SiO.sub.2 /Al.sub.2 O.sub.3 produced by processing the particles with an alkali metal silicate solution and an aluminum sulphate solution, or it is chemically bonded to the binder by enveloping the particles with poly(tetrafluroethylene) and coupling the latter, via an amino bridge to the binder, e.g. an epoxide resin.

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patent: 4634627 (1987-01-01), Fujiki

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