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21 条记录 (耗时 0.03 秒)

    Process for the preparation of magnetic recording medium
    3.
    发明授权
    Process for the preparation of magnetic recording medium 失效
    制备磁记录介质的方法

    公开(公告)号：US4189508A

    公开(公告)日：1980-02-19

    申请号：US943123

    申请日：1978-09-18

    申请人： Katsuyoshi Chiba ,  Yoshiki Kato ,  Teruo Tsunoda ,  Hajime Fukke ,  Teruaki Kobayashi ,  Heigo Ishihara ,  Waichi Nagashiro ,  Munehisa Mitsuya

    发明人： Katsuyoshi Chiba ,  Yoshiki Kato ,  Teruo Tsunoda ,  Hajime Fukke ,  Teruaki Kobayashi ,  Heigo Ishihara ,  Waichi Nagashiro ,  Munehisa Mitsuya

    IPC分类号： G11B5/02 ,  G11B5/845 ,  H01F10/02

    CPC分类号： G11B5/845 ,  G11B5/02

    摘要： A process for the preparation of a magnetic recording medium comprising;applying a magnetic coating material composed of dispersing a ferromagnetic fine powder in a high molecular binder onto the surfaces of a nonmagnetic support member to form a coating thereon;arraying one or more sets of magnet pairs on the sides of front and back surfaces of said support member, each of said magnet pairs being deviated by a predetermined distance in the moving direction of said support member such that said magnet pairs will not face to each other; andapplying a magnetic field in such a manner that the magnetic field applied to said coating by the magnet pairs arrayed on the side of the front surface of said support member is greater than the magnetic field applied to said coating by the magnet pairs arrayed on the side of the back surface of said support member, thereby satisfying the requirements ofDo.ltoreq.a,b wherein Do represents a distance between the surface of said support member and said magnet pairs, a an average distance between the magnets constituting said magnet pairs arrayed on the side of the front surface of said support member, and b an average distance between the magnets constituting said magnet pairs arrayed on the side of the back surface of said support member.

    摘要翻译： 一种制备磁记录介质的方法，包括： 将由铁磁性细粉末分散在高分子粘合剂中的磁性涂料施加到非磁性支撑构件的表面上以在其上形成涂层; 在所述支撑构件的前表面和后表面的侧面上排列一组或多组磁体对，每个所述磁体对在所述支撑构件的移动方向上偏离预定距离，使得所述磁体对将不面对每个 其他; 并施加磁场，使得排列在所述支撑构件的前表面侧上的磁体对施加到所述涂层的磁场大于通过排列在所述支撑构件的前面的磁体对施加到所述涂层的磁场 从而满足Do a的要求，其中Do表示所述支撑构件的表面与所述磁体对之间的距离，构成所述磁体对的磁体之间的平均距离 排列在所述支撑构件的前表面的侧面上，b是构成所述磁体对的磁体之间的平均距离，排列在所述支撑构件的后表面侧。

    Magnetic recording medium and method for producing the same
    6.
    发明授权
    Magnetic recording medium and method for producing the same 失效
    磁记录介质及其制造方法

    公开(公告)号：US4985295A

    公开(公告)日：1991-01-15

    申请号：US141423

    申请日：1988-01-07

    申请人： Heigo Ishihara ,  Akira Osaki ,  Waichi Nagashiro ,  Fuzio Maeda

    发明人： Heigo Ishihara ,  Akira Osaki ,  Waichi Nagashiro ,  Fuzio Maeda

    IPC分类号： C09D5/23 ,  G11B5/714 ,  G11B5/725

    CPC分类号： G11B5/714 ,  G11B5/725 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/249981

    摘要： A magnetic recording medium comprising a substrate and, formed thereon, a magnetic layer comprised of magnetic particles bonded to each other with a thermosetting binder can be improved with respect to the durability by forming a number of fine pores in the magnetic layer and impregnating the fine pores with a lubricant. Particularly, when the fine pores have a diameter of 0.2 .mu.m or less and a rate of the fine pore in area of 3 to 30%, the durability can be improved while maintaining the noise during the recording and reproduction of information on a low level. In preparing the magnetic recording medium having such fine pores, it is preferred that an easily thermal-decomposable additive, such as polyalkylene oxide, be added to a magnetic layer forming paint.A magnetic recording medium having further improved characteristics can be produced by interposing an undercoating layer having a number of fine pores between the magnetic layer and the substrate, allowing the fine pores in the undercoating layer to communicate with the fine pores with a lubricant. In this case, in forming the fine pores, it is preferable to add an easily thermal-decomposable additive to a paint or extract a thermoplastic resin from a layer containing the thermoplastic resin with a solvent.

    摘要翻译： 通过在磁性层中形成许多细孔并浸渍精细的方法，可以提高包含基材和形成在其上的由磁性颗粒彼此结合的由热固性粘合剂组成的磁性层的磁性记录介质。 有润滑剂的孔。 特别是，当细孔的直径为0.2μm以下，细孔的面积率为3〜30％时，可以提高耐久性，同时保持记录期间的噪音和低信息的再生 。 在制备具有这种细孔的磁记录介质时，优选将易分解性的添加剂，例如聚环氧烷，加到磁性层形成涂料中。 具有进一步改善的特性的磁记录介质可以通过在磁性层和衬底之间插入具有许多细孔的底涂层，使底涂层中的细孔与润滑剂与细孔连通来产生。 在这种情况下，在形成细孔时，优选在涂料中添加容易热分解的添加剂，或者由含有热塑性树脂的层用溶剂提取热塑性树脂。

    Magnetic recording medium and method for producing the same
    7.
    发明授权
    Magnetic recording medium and method for producing the same 失效
    磁记录介质及其制造方法

    公开(公告)号：US5000982A

    公开(公告)日：1991-03-19

    申请号：US561600

    申请日：1990-08-02

    申请人： Heigo Ishihara ,  Akira Osaki ,  Waichi Nagashiro ,  Fuzio Maeda

    发明人： Heigo Ishihara ,  Akira Osaki ,  Waichi Nagashiro ,  Fuzio Maeda

    IPC分类号： C09D5/23 ,  G11B5/714 ,  G11B5/725

    CPC分类号： G11B5/714 ,  G11B5/725 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/249981

    摘要： A magnetic recording medium comprising a substrate and, formed thereon, a magnetic layer comprised of magnetic particles bonded to each other with a thermosetting binder can be improved with respect to the durability by forming a number of fine pores in the magnetic layer and impregnating the fine pores with a lubricant. Particularly, when the fine pores have a diameter of 0.2 .mu.m or less and a rate of the fine pore in area of 3 to 30%, the durability can be improved while maintaining the noise during the recording and reproduction of information on a low level. In preparing the magnetic recording medium having such fine pores, it is preferred that an easily thermal-decomposable additive, such as polyalkylene oxide, be added to a magnetic layer forming paint. A magnetic recording medium having further improved characteristics can be produced by interposing an undercoating layer having a number of fine pores between the magnetic layer and the substrate, allowing the fine pores in the undercoating layer to communicate with the fine pores in the magnetic layer and impregnating the fine pores with a lubricant. In this case, in forming the fine pores, it is preferable to add an easily thermal-decomposable additive to a paint or extract a thermoplastic resin from a layer containing the thermoplastic resin with a solvent.

    摘要翻译： 通过在磁性层中形成许多细孔并浸渍精细的方法，可以提高包含基材和形成在其上的由磁性颗粒彼此结合的由热固性粘合剂组成的磁性层的磁性记录介质。 有润滑剂的孔。 特别是，当细孔的直径为0.2μm以下，细孔的面积率为3〜30％时，可以提高耐久性，同时保持记录期间的噪音和低信息的再生 。 在制备具有这种细孔的磁记录介质时，优选将易分解性的添加剂，例如聚环氧烷，加到磁性层形成涂料中。 具有进一步改善的特性的磁记录介质可以通过在磁性层和衬底之间插入具有许多细孔的底涂层来制造，使得底涂层中的细孔与磁性层中的细孔连通并浸渍 细孔带润滑剂。 在这种情况下，在形成细孔时，优选在涂料中添加容易热分解的添加剂，或者由含有热塑性树脂的层用溶剂提取热塑性树脂。

    Magnetic recording medium having a lubricant layer comprising ionically interbonded fluoropolyethers with acidic and basic terminal groups
    9.
    发明授权
    Magnetic recording medium having a lubricant layer comprising ionically interbonded fluoropolyethers with acidic and basic terminal groups 失效
    磁记录介质具有润滑层，该润滑剂层包含具有酸性和碱性末端基团的离子键合的氟聚醚

    公开(公告)号：US5498457A

    公开(公告)日：1996-03-12

    申请号：US270536

    申请日：1994-07-05

    申请人： Heigo Ishihara ,  Takanori Kudo

    发明人： Heigo Ishihara ,  Takanori Kudo

    IPC分类号： G11B5/72 ,  C09D171/02 ,  C10M105/54 ,  C10M105/58 ,  C10N40/18 ,  G11B5/725 ,  G11B5/82 ,  G11B5/00

    CPC分类号： G11B5/725 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/3154 ,  Y10T428/31544

    摘要： A highly reliable rotary magnetic recording medium has a lubricating film layer on its surface, the lubricating film layer being composed of fluoropolyether having at least two acidic functional groups in one molecule as a lubricant and fluoropolyether having at least two basic functional groups in one molecule as another lubricant, where a stable network structure is formed on the surface of the magnetic recording medium by an appropriate combination of the lubricant having the acidic groups at the terminal ends of lubricant molecule and the lubricant having the basic groups at the terminal ends of lubricant molecule.

    摘要翻译： 高度可靠的旋转磁记录介质在其表面上具有润滑膜层，润滑膜层由在一个分子中具有至少两个酸性官能团的氟聚醚作为润滑剂和在一个分子中具有至少两个碱性官能团的氟聚醚组成 另一种润滑剂，其中通过在润滑剂分子的末端具有酸性基团的润滑剂和在润滑剂分子的末端具有碱性基团的润滑剂的适当组合，在磁记录介质的表面上形成稳定的网络结构 。