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    Process of making a magnetic recording media
    1.
    发明授权
    Process of making a magnetic recording media 失效
    制作磁记录媒体的过程

    公开(公告)号：US4310565A

    公开(公告)日：1982-01-12

    申请号：US150181

    申请日：1980-05-15

    申请人： August Lehner ,  Heinrich Hartmann ,  Rudolf Bachmann ,  Albert Kohl ,  Herbert Spoor ,  Karl Mahler ,  Werner Balz

    发明人： August Lehner ,  Heinrich Hartmann ,  Rudolf Bachmann ,  Albert Kohl ,  Herbert Spoor ,  Karl Mahler ,  Werner Balz

    IPC分类号： G11B5/70 ,  C09D5/23 ,  G11B5/702 ,  G11B5/842 ,  B05D5/12

    CPC分类号： G11B5/7021

    摘要： A process for the manufacture of magnetic recording media, comprising a non-magnetic base and, applied thereto, one or more magnetizable layers, consisting of an anisotropic magnetic material finely dispersed in an organic binder, wherein the binder contains at least 40% of an aqueous ionomeric polyurethane dispersion which at 50.degree. C. forms films having a modulus of elasticity of from 50 to 700 N/mm.sup.2 and a DIN No. 53,157 pendulum hardness of from 20 to 110 s, the corresponding values of the modulus and hardness at room temperature being more than 3.5 times higher.

    摘要翻译： 一种用于制造磁记录介质的方法，包括非磁性基底，并施加于其上，由可分散在有机粘合剂中的各向异性磁性材料组成的一个或多个可磁化层，其中所述粘合剂含有至少40％的 水性离聚物聚氨酯分散体，其在50℃下形成弹性模量为50-700N / mm2的薄膜和DIN编号53,157摆锤硬度为20至110秒，相应的室温模量和硬度值 温度高出3.5倍以上。

    Device for the magnetic orientation of magnetic recording media
    2.
    发明授权
    Device for the magnetic orientation of magnetic recording media 失效
    磁记录介质的磁性定向装置

    公开(公告)号：US4043297A

    公开(公告)日：1977-08-23

    申请号：US731140

    申请日：1976-10-12

    申请人： Job-Werner Hartmann ,  Roland Falk ,  Aribert Krug ,  Georg Huber ,  Werner Balz ,  Karl Mahler

    发明人： Job-Werner Hartmann ,  Roland Falk ,  Aribert Krug ,  Georg Huber ,  Werner Balz ,  Karl Mahler

    IPC分类号： G11B5/845 ,  B05C11/00

    CPC分类号： G11B5/845

    摘要： A process and apparatus for producing magnetic discs in which the preferred direction of orientation of the anisotropic magnetic particles, contained in an organic binder system, is tangential to the circumference of the disc. Orientation is effected, prior to solidification of the magnetic layer, by the action of a magnetic field which is formed in the plane of symmetry between at least two pairs of magnetic poles, the poles of each pair being of the same polarity and opposite each other. One pair of poles flares out in cross section toward the plane of symmetry between the pairs of poles, whereas the other pair or pairs of poles of opposite polarity, when viewed in cross section, taper toward the said plane of symmetry to a point, the distance between the poles of such pair(s) being greater than that between the flared poles, and the plane of symmetry of the pairs of poles being in the plane of the disc. Using this process and apparatus, magnetic discs with a non-magnetic metallic base are obtained, in which the anisotropic magnetic particles in the layer of fluid binder applied to the base are oriented tangentially to the circumference of the disc during spin-coating.

    摘要翻译： 用于制造磁盘的方法和装置，其中包含在有机粘合剂系统中的各向异性磁性颗粒的优选取向方向与盘的圆周相切。 在磁性层凝固之前，通过在至少两对磁极之间的对称平面中形成的磁场的作用来实现取向，每对磁极具有相同的极性并且彼此相对 。 一对电极的横截面向着两对极之间的对称平面展开，而相反极性的另一对或两对磁极在横截面看时，朝向所述对称平面逐渐变细为一点。 这些对的极之间的距离大于扩张的极之间的距离，并且磁极对的对称平面在盘的平面中。 使用该方法和装置，获得具有非磁性金属基底的磁盘，其中施加到基底的流体粘合剂层中的各向异性磁性颗粒在旋转涂覆期间与盘的圆周相切地定向。