| 摘要 |
PURPOSE:To increase the adhesive power of a magnetic layer and nonmagnetic base and to improve running durability by subjecting the base to an electron ray projection treatment, coating the magnetic layer on one face thereof, coating a back layer on the other face, and projecting radiations thereto. CONSTITUTION:The magnetic layer is provided to one face of the nonmagnetic base and the back layer to the other face. This nonmagnetic base is subjected to the electron ray projection treatment, by which a hydrophilic property is imparted simultaneously to the front and rear faces of the base. The magnetic layer and back layer are coated and provided directly on the base after the treatment. The coating is dried while a magnetic field is oriented at need after coating of the magnetic layer and thereafter, the coating is subjected to a smoothing treatment by a super calender and is further subjected to the radiation projection treatment. The adhesion of the high-property magnetic layer and the back layer and the nonmagnetic base having the smooth surface is thereby improved and the magnetic recording medium having the excellent electromagnetic conversion characteristic and running durability is obtd.
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