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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：US4624892A

    公开(公告)日：1986-11-25

    申请号：US750173

    申请日：1985-07-01

    申请人： Hideki Ishizaki ,  Hiroyuki Arioka ,  Toshiaki Ide

    发明人： Hideki Ishizaki ,  Hiroyuki Arioka ,  Toshiaki Ide

    IPC分类号： C09D5/23 ,  C09D7/12 ,  C10M171/00 ,  C10N40/18 ,  G11B5/72 ,  G11B5/70 ,  B32B5/16

    CPC分类号： G11B5/72 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/259

    摘要： A magnetic recording medium comprising a magnetic recording layer formed on one major surface of a non-magnetic substrate and a topcoat layer formed on the magnetic layer is characterized in that the topcoat layer contains a submicron particulate pigment observable under an electron microscope to have a linear distribution density of 10 to 1,000 per linear 100 .mu.m and a particle size of less than 200 .ANG. whereby the topcoat layer has a surface roughness R20 of not more than 400 .ANG..

    摘要翻译： 包括形成在非磁性基材的一个主表面上的磁记录层和形成在磁性层上的顶涂层的磁记录介质的特征在于，顶涂层含有可在电子显微镜下观察到的亚微米颗粒颜料以具有线性 分布密度为每线性100微米10至1,000，粒径小于200埃，由此该顶涂层的表面粗糙度R20不超过400埃。

    Magnetic recording medium
    4.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4618535A

    公开(公告)日：1986-10-21

    申请号：US642208

    申请日：1984-08-20

    申请人： Masaharu Nishimatsu ,  Toshiaki Ide ,  Hiroyuki Arioka ,  Yuichi Kubota

    发明人： Masaharu Nishimatsu ,  Toshiaki Ide ,  Hiroyuki Arioka ,  Yuichi Kubota

    IPC分类号： C09D175/04 ,  C09D127/06 ,  G11B5/64 ,  G11B5/73 ,  G11B5/735 ,  G11B5/72

    CPC分类号： G11B5/735 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/252 ,  Y10T428/257 ,  Y10T428/258 ,  Y10T428/30 ,  Y10T428/31609 ,  Y10T428/31935

    摘要： A magnetic recording medium comprising a plastic base film, a thin magnetic metal layer formed on one side of the base film and a backing layer formed on the other side of the base film, characterized in that the backing layer is composed essentially of a thermoset or radiation-cured resin and carbon black and inorganic compound powder uniformly dispersed in the resin, and has a surface roughness of from 0.05 to 0.4 .mu.m, said carbon black having an average particle size of from 10 to 150 m.mu.m as measured by an electron microscope, said inorganic compound powder having a Mohs hardness of at most 6 and a particle size of from 10 to 500 m.mu.m, and the ratio of the carbon black to the inorganic compound powder being from 1:9 to 9:1.

    摘要翻译： 一种磁记录介质，包括塑料基膜，形成在基膜的一侧上的薄磁性金属层和形成在基膜另一侧上的背衬层，其特征在于背衬层基本上由热固性材料或 辐射固化树脂和炭黑和无机化合物粉末均匀分散在树脂中，表面粗糙度为0.05-0.4μm，所述炭黑的平均粒径为10-150μm，通过 电子显微镜，所述无机化合物粉末的莫氏硬度至多为6，粒径为10〜500μm，碳黑与无机化合物粉末的比例为1:9〜9:1。

    Magnetic recording medium
    6.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4639389A

    公开(公告)日：1987-01-27

    申请号：US680889

    申请日：1984-12-12

    申请人： Masaharu Nishimatsu ,  Toshiaki Ide ,  Hiroyuki Arioka

    发明人： Masaharu Nishimatsu ,  Toshiaki Ide ,  Hiroyuki Arioka

    IPC分类号： G11B5/708 ,  G11B5/735 ,  G11B5/72

    CPC分类号： G11B5/735 ,  G11B5/7085 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24372 ,  Y10T428/24405 ,  Y10T428/25 ,  Y10T428/31609 ,  Y10T428/31935 ,  Y10T428/31938

    摘要： A magnetic recording medium comprising a plastic base film, a magnetic layer formed on one side of the base film and a backing layer formed on the other side of the base film, characterized in that said magnetic layer has a surface roughness of at most 0.08 .mu.m, and said backing layer is composed essentially of first particles of an inorganic pigment having an average particle size of from 0.04 to 0.5 .mu.m and a Mohs hardness of from 2 to 4 and second particles of an inorganic pigment having an average particles size of from 0.04 to 0.5 .mu.m and a Mohs hardness of from 5 to 7, dispersed in a thermoset or radiation-cured binder.

    摘要翻译： 一种磁记录介质，包括塑料基膜，形成在基膜的一侧的磁性层和形成在基膜另一侧的背衬层，其特征在于，所述磁性层的表面粗糙度至多为0.08μm m，所述背衬层基本上由平均粒度为0.04〜0.5μm，莫氏硬度为2〜4的无机颜料的第1粒子和平均粒径为2〜4的无机颜料的第2粒子 分散在热固性或辐射固化粘合剂中的0.04-0.5μm和莫氏硬度为5至7。

    Magnetic recording medium
    7.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4950535A

    公开(公告)日：1990-08-21

    申请号：US281936

    申请日：1988-12-06

    申请人： Hiroyuki Arioka ,  Masharu Nishimatsu ,  Toshiaki Ide

    发明人： Hiroyuki Arioka ,  Masharu Nishimatsu ,  Toshiaki Ide

    IPC分类号： G11B5/725 ,  G11B5/735

    CPC分类号： G11B5/725 ,  G11B5/735 ,  Y10S428/90 ,  Y10T428/265

    摘要： A magnetic recording medium, comprising a substrate, a ferromagnetic film layer formed on the surface of said substrate, and a back coating layer deposited on the other surface of said substrate and formed of a mixture produced by dispersing a powdered non-magnetic substance in a binder containing therein a thermosetting resin and at least one lubricant selected from the group consisting of fatty acids and fatty acid ester.

    摘要翻译： 一种磁记录介质，包括基板，形成在所述基板的表面上的强磁性膜层和沉积在所述基板的另一表面上并由通过将粉末状非磁性物质分散在其中而形成的混合物形成的背涂层 含有热固性树脂的粘合剂和选自脂肪酸和脂肪酸酯的至少一种润滑剂。

    Magnetic recording medium
    9.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4591528A

    公开(公告)日：1986-05-27

    申请号：US636502

    申请日：1984-08-01

    申请人： Masaharu Nishimatsu ,  Toshiaki Ide ,  Yuichi Kubota ,  Yoshiaki Saito ,  Hiroyuki Arioka

    发明人： Masaharu Nishimatsu ,  Toshiaki Ide ,  Yuichi Kubota ,  Yoshiaki Saito ,  Hiroyuki Arioka

    IPC分类号： C09D5/23 ,  C09C1/48 ,  C09D7/12 ,  G11B5/714 ,  G11B5/73 ,  G11B5/735 ,  G11B5/72

    CPC分类号： G11B5/714 ,  G11B5/735 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/30

    摘要： A magnetic recording medium comprising a plastic base film, a magnetic layer formed on one side of the base film and composed of a ferromagnetic alloy powder dispersed in a resin binder, and a backing layer formed on the other side of the base film, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g as measured by BET method, said magnetic layer has a coercive force of at least 1,000 Oe and a surface roughness of at most 0.08 .mu.m, and said backing layer is composed essentially of a thermoset or radiation-cured resin and carbon black dispersed in the resin, and has a surface roughness of from 0.05 to 0.6 .mu.m, said carbon black having an average particle size of from 10 to 60 .mu.m as measured by an electron microscope.

    摘要翻译： 一种磁记录介质，包括塑料基膜，形成在基膜的一侧上并由分散在树脂粘合剂中的铁磁性合金粉末构成的磁性层和形成在基膜另一侧的背衬层的磁性层，其特征在于， 所述铁磁合金粉末通过BET法测定的表面积为至少48m 2 / g，所述磁性层的矫顽力为至少1000Oe，表面粗糙度为0.08μm以下，所述背衬层为 基本上由分散在树脂中的热固性或辐射固化树脂和炭黑组成，并且具有0.05至0.6μm的表面粗糙度，所述炭黑的平均粒度为10至60μm，通过 电子显微镜。