Magnetic recording medium and method of manufacturing the same
AssigneeTDK Electronic Company
InventorYuichi Kubota
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Abstract
A magnetic recording medium, consisting of a base coated with a magnetic coating material, contains finely divided particles of at least either nickel or copper uniformly dispersed in the magnetic coating, in the form of primary particles obtained by pulverization of the skeletal structure of a mother salt or of an aggregated structure. In a method of manufacturing the medium, an antistatic additive, prepared by pulverizing and dispersing at least either Ni powder or Cu powder which retains the skeletal structure of a mother salt or having an aggregated structure, in the presence of a polymeric material, is mixed in the magnetic coating material.
Claims11
A method of manufacturing a magnetic recording medium by applying a magnetic coating material containing a magnetic powder and a binder on a base, characterized in that an antistatic additive, prepared by pulverizing and dispersing at least either nickel powder or copper powder which has the skeletal structure of a mother salt or having an aggregated structure, in the presence of a polymeric material, said pulverizing being effected by the exertion of a shearing force of a sufficient magnitude such that the skeletal structure is no longer retained or the aggregated structure is disintegrated, is mixed in said magnetic coating material.
Dependencies are inferred from the claim text.