Method for producing magnetic recording medium

Details Method for producing magnetic recording medium Method for producing magnetic recording medium

1998-03-18

2000-10-03

Pianalto, Bernard

Coating processes

Magnetic base or coating

Magnetic coating

427130, 427132, B05D 512

Patent

active

061269905

ABSTRACT:
A method for producing a magnetic recording medium having low head abrasion loss and excellent mechanical strength characteristics, said medium having a magnetic layer mainly composed of a ferromagnetic powder and a binder on one surface of a non-magnetic support and a backcoat layer on the other surface of the support, wherein said ferromagnetic powder comprises chromium dioxide and cobalt-containing iron oxide within the weight ratio (wt %) range of 40:60 to 70:30, and said magnetic layer is formed of a paint prepared by a process comprising kneading cobalt-containing iron oxide and the binder at a solid concentration of 65% to 85% by weight, subsequently diluting the resulting product with the binder and a solvent, then, adding chromium dioxide thereto, followed by stirring to obtain a mixture, and subjecting the mixture to dispersion.

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