| 摘要 |
<p>PURPOSE:To improve the wear resistance, durability, and traveling stability of the titled medium by using specified two kinds of lubricants which are hardly compatible with each other to form an insular lubricating coated film on the surface of a magnetic layer. CONSTITUTION:At least two kinds of lubricants shown by formulas (I) and (II) are applied on the surface of the magnetic layer. Since both lubricants are hardly compatible with each other and never mixed with each other, phase separation is caused microscopically, one lubricant having higher affinity for the surface of the magnetic layer due to its characteristic and molecular structure is continuously coated on the surface of the magnetic layer to form 'the sea', and the other lubricant having lower affinity is discontinuously coated to form 'the islands' which are dispersed and retained in the other lubricating coated film. Consequently, an insular lubricating film is formed on the surface of the magnetic layer. In the formulas, X and Y are a fluorine atom, a hydrophilic group, or a monovalent group having a carbon-carbon double bond at the molecular terminal, (l), (m), and (n) are an integer, (l) is 10-100, (m) is 5-100, and (n) is 10-200.</p> |
