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    Magnetic recording medium
    1.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US6042938A

    公开(公告)日：2000-03-28

    申请号：US992088

    申请日：1997-12-17

    申请人： Tsunehiko Ikarashi ,  Masahide Kohno ,  Shinji Miyazaki

    发明人： Tsunehiko Ikarashi ,  Masahide Kohno ,  Shinji Miyazaki

    IPC分类号： C09D175/04 ,  G11B5/72 ,  G11B5/735 ,  G11B5/68

    CPC分类号： G11B5/735 ,  Y10S428/90 ,  Y10T428/25

    摘要： A magnetic recording medium includes a non-magnetic supporting substrate, and a magnetic layer on one surface thereof and a back coat layer on the other surface thereof, said back coat layer having a non-magnetic powder dispersed in a binder. The back coat layer contains carbon black and an inorganic powder as said non-magnetic powder. The carbon black contains a carbon black species having an average primary particle diameter of 40 to 70 nm, and the inorganic powder has an average primary particle diameter of 40 to 150 nm and a Mohs hardness of at least 3, with a weight ratio between said carbon black and said inorganic powder being 100:0.5 to 100:10. The binder comprises a phenoxy resin, a thermoplastic polyurethane resin having an amino group in a molecule thereof, and a polyisocyanate compound.

    摘要翻译： 磁记录介质包括非磁性支撑基板，在其一个表面上具有磁性层，在另一个表面上具有背涂层，所述背涂层具有分散在粘合剂中的非磁性粉末。 背涂层含有炭黑和作为非磁性粉末的无机粉末。 炭黑含有平均一次粒径为40〜70nm的碳黑物质，无机粉末的平均一次粒径为40〜150nm，莫氏硬度为3以上，重量比为 炭黑，所述无机粉末为100:0.5〜100:10。 粘合剂包含苯氧基树脂，分子中具有氨基的热塑性聚氨酯树脂和多异氰酸酯化合物。

    Magnetic recording medium
    2.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US6040052A

    公开(公告)日：2000-03-21

    申请号：US58135

    申请日：1998-04-10

    申请人： Hiromichi Kanazawa ,  Kunihiro Ueda ,  Katsuaki Yanagiuchi ,  Tsunehiko Ikarashi ,  Masahide Kohno

    发明人： Hiromichi Kanazawa ,  Kunihiro Ueda ,  Katsuaki Yanagiuchi ,  Tsunehiko Ikarashi ,  Masahide Kohno

    IPC分类号： C23C14/08 ,  C23C16/50 ,  G11B5/64 ,  G11B5/66 ,  G11B5/72 ,  G11B5/725 ,  G11B5/84 ,  B32B9/00

    CPC分类号： G11B5/8408 ,  G11B5/72 ,  G11B5/725 ,  Y10S428/90 ,  Y10T428/30

    摘要： A magnetic recording (vapor deposition) film medium having improved friction characteristics, running durability, and still characteristics are provided. The magnetic recording thin film medium comprises a non-magnetic support having on at least one surface thereof a magnetic layer, a protective layer formed on the magnetic layer, and a lubricant layer formed on the protective layer, wherein the magnetic recording medium is obtained by that after forming the magnetic layer on the surface of the non-magnetic support conveyed along the surface of a cooling roll, a carbon-containing plasma polymerized film is formed on the magnetic layer as the protective layer, while conveying the non-magnetic support having the magnetic layer along the surface of a cooling roll, and after surface-treating the carbon-containing plasma polymerized film on the same cooling roll as the protective layer-forming roll or on a different cooling roll from the protective layer-forming roll without applying a bias voltage to the surface-treatment roll, whereby a double bond component of carbon and oxygen is incorporated in the surface of the carbon-containing plasma polymerized film at a ratio of from 1.4 to 7.5 atomic % to the whole carbon amount of the surface of the carbon-containing plasma polymerized film, and the lubricant layer made up of an ester of a fluorinated alcohol and a fatty acid is then formed on the carbon-containing plasma polymerized film.

    摘要翻译： 提供了具有改善的摩擦特性，运行耐久性和静止特性的磁记录（气相沉积）薄膜介质。 磁记录薄膜介质包括在其至少一个表面上具有磁性层，形成在磁性层上的保护层和形成在保护层上的润滑层的非磁性载体，其中磁记录介质由 在沿着冷却辊的表面输送的非磁性载体的表面上形成磁性层之后，在作为保护层的磁性层上形成含碳等离子体聚合膜，同时输送具有 沿着冷却辊的表面的磁性层，并且在与保护层形成辊相同的冷却辊上或与保护层形成辊不同的冷却辊上表面处理含碳等离子体聚合膜，而不施加 表面处理辊的偏置电压，由此将碳和氧的双键成分并入含碳等离子体的表面 然后，形成以含碳等离子体聚合膜表面的全碳量为基准的1.4〜7.5原子％的比例的聚合膜，由氟化醇和脂肪酸的酯构成的润滑剂层 在含碳等离子体聚合膜上。