| 摘要 |
PURPOSE:To improve output and durability in particular by coating a compd. having a lubricative group and double bonds in one molecule on a magnetic coated film which is preliminarily partially cured and curing said film, thereby bonding the lubricating agent layer onto the magnetic coated film. CONSTITUTION:A magnetic coating compd. consisting of a mixture composed of a resin compsn. having the double bonds of the nature that the compd. is cured by electron rays, solvent and magnetic powder is coated on a base and after the solvent is removed, the coating is subjected to a surface smoothing treatment to form the magnetic coated film. The magnetic coated film is then precured by projecting the electron rays thereon and thereafter, the compd. contg. at least one group having lubricity and at least one electron ray curing double bonds in one molecule is coated thereon. The magnetic coated film is cured by projecting the electron rays again thereto. The perfluoroalkyl acrylate expressed by the formula I is more particularly preferable as said compd. The migration of the lubricating agent in the magnetic layer is thereby prevented and various defects associated with the addition or coating of the lubricating agent are overcome.
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