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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：US4728558A

    公开(公告)日：1988-03-01

    申请号：US890342

    申请日：1986-07-29

    申请人： Toshio Ono ,  Yasuo Tamai ,  Chiaki Mizuno ,  Hiroshi Ogawa ,  Shinji Saito

    发明人： Toshio Ono ,  Yasuo Tamai ,  Chiaki Mizuno ,  Hiroshi Ogawa ,  Shinji Saito

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/70 ,  G11B5/73 ,  G11B5/78

    CPC分类号： G11B5/70 ,  G11B5/7305 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

    摘要： A magnetic recording medium such as an audio-tape or a video-tape comprising a flexible support and a magnetic recording layer provided on one surface of said support, which is characterized in that the total of the thickness of said magnetic recording layer (dM) and the thickness of said support (dB), namely dM plus dB, is not larger than 14 .mu.m; the ratio of the thickness of said magnetic recording layer (dM) to the thickness of said support (dB), namely dM/dB, is in the range of 0.6-1.0; and said magnetic recording medium has F-3 tensile strength in the range of 6.0-8.5 kg/mm.sup.2.

    摘要翻译： 一种磁记录介质，例如音频带或录像带，包括设置在所述支撑体的一个表面上的柔性支撑和磁记录层，其特征在于，所述磁记录层（dM）的厚度总和 并且所述载体的厚度（dB）即dM加dB不大于14μm; 所述磁记录层（dM）的厚度与所述支架的厚度的比（dB）即dM / dB在0.6-1.0的范围内; 并且所述磁记录介质的F-3拉伸强度在6.0-8.5kg / mm2的范围内。

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

    公开(公告)号：US4946740A

    公开(公告)日：1990-08-07

    申请号：US214256

    申请日：1988-07-01

    申请人： Toshio Ono ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Shinji Saito

    发明人： Toshio Ono ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Shinji Saito

    IPC分类号： C09D5/23 ,  G11B5/708 ,  G11B5/716

    CPC分类号： G11B5/716 ,  G11B5/708 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/30

    摘要： A magnetic recording medium is described, comprising a non-magnetic support having thereon a first magnetic layer comprising at least about 1.0 part by weight of carbon black having an average primary particle diameter of from about 20 to 80 m.mu., per 100 parts by weight of magnetic particles contained in the first magnetic layer; and on the first magnetic layer, a second magnetic layer containing from about 0.1 to less than 1.0 part by weight of carbon black having an average primary particle diameter of from about 20 to 150 m.mu., per 100 parts by weight of magnetic particles contained in the second magnetic layer. The medium has excellent electromagnetic characteristics, running durability and heat resistance.

    摘要翻译： 描述了一种磁记录介质，其包括非磁性载体，其上具有第一磁性层，该第一磁性层包含至少约1.0重量份的平均一次粒径为约20至80μm的碳黑，每100重量份 包含在第一磁性层中的磁性颗粒; 并且在第一磁性层上，每100重量份包含的磁性颗粒含有约0.1至小于1.0重量份的平均一次粒径为约20至150μm的炭黑的第二磁性层 第二磁性层。 该介质具有优异的电磁特性，运行耐久性和耐热性。

    Process for producing magnetic recording medium
    3.
    发明授权
    Process for producing magnetic recording medium 失效
    磁记录介质的制造方法

    公开(公告)号：US4724162A

    公开(公告)日：1988-02-09

    申请号：US39878

    申请日：1987-04-20

    申请人： Shinji Saito ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Toshio Ono ,  Yasuo Tamai

    发明人： Shinji Saito ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Toshio Ono ,  Yasuo Tamai

    IPC分类号： B01F3/12 ,  G11B5/702 ,  G11B5/842 ,  H01F10/02

    CPC分类号： G11B5/842 ,  G11B5/7028

    摘要： An improvement of a process for producing a magnetic recording medium comprising coating a non-magnetic support with a magnetic paint comprising a magnetic layer forming component containing ferromagnetic powder and a resin component dispersed in an organic solvent and drying the coated layer. The improvement resides in the preparation of the magnetic paint. In the improvement, the magnetic paint is obtained by kneading said magnetic layer forming component and a first solvent having a solubility parameter of not lower than 9.5[cal..multidot.cm.sup.-3 ].sup.1/2 as measured by Small method and adding a second solvent to the resulting kneaded product so that the mixed organic solvent in the magnetic paint has a solubility parameter of lower than 9.5[cal.multidot.cm.sup.-3 ].sup.1/2 to thereby disperse the magnetic layer forming component in the organic solvent.

    摘要翻译： 一种制造磁记录介质的方法的改进，包括用包含含有铁磁粉末的磁性层形成组分和分散在有机溶剂中的树脂组分的磁性涂料涂覆非磁性载体并干燥涂层。 改进在于磁性涂料的制备。 在此改进中，磁性涂料是通过将所述磁性层形成组分和溶解度参数不低于9.5 [cal.xcm-3] 1/2的第一种溶剂进行捏合而获得的，通过Small法测量，并将第二溶剂加入到 得到的混炼物，使得磁性涂料中的混合有机溶剂的溶解度参数低于9.5 [calxcm-3] 1/2，从而将磁性层形成组分分散在有机溶剂中。

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

    公开(公告)号：US4965120A

    公开(公告)日：1990-10-23

    申请号：US199821

    申请日：1988-05-27

    申请人： Toshio Ono ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Shinji Saito

    发明人： Toshio Ono ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Shinji Saito

    IPC分类号： C09D5/23 ,  G11B5/708 ,  G11B5/714 ,  G11B5/716

    CPC分类号： G11B5/708 ,  G11B5/714 ,  G11B5/716 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/30

    摘要： A magnetic recording medium is described, comprising a nonmagnetic support having thereon a first magnetic layer and having on the first magnetic layer a second magnetic layer, in that order, said second magnetic layer comprising a magnetic particle, a binder, abrasive particles and carbon black having an average primary particle diameter of 80 m.mu. or more, said first magnetic layer comprising a magnetic particle, a binder and carbon black having an average primary particle diameter of 40 m.mu. or less without substantially containing abrasive particles in the first magnetic layer, and the thickness ratio of the first layer to the second layer, first layer thickness/second layer thickness is 1.8 or more.

    摘要翻译： 描述了一种磁记录介质，其包括其上具有第一磁性层的非磁性载体，并且在第一磁性层上具有第二磁性层，所述第二磁性层依次包括磁性颗粒，粘合剂，磨料颗粒和炭黑 平均一次粒径为80μm以上，所述第一磁性层包含平均一次粒径为40μm以下的磁性粒子，粘结剂和炭黑，而在第一磁性层中基本上不含研磨粒子， 以及第一层与第二层的厚度比，第一层厚度/第二层厚度为1.8以上。

    Magnetic recording medium
    5.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4710421A

    公开(公告)日：1987-12-01

    申请号：US29557

    申请日：1987-03-24

    申请人： Toshio Ono ,  Yasuo Tamai ,  Chiaki Mizuno ,  Hiroshi Ogawa ,  Shinji Saito

    发明人： Toshio Ono ,  Yasuo Tamai ,  Chiaki Mizuno ,  Hiroshi Ogawa ,  Shinji Saito

    IPC分类号： G11B5/70 ,  C09D5/23 ,  C09D7/12 ,  G11B5/73

    CPC分类号： G11B5/7305 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/24975 ,  Y10T428/31786

    摘要： A magnetic recording medium having a heat shrinkage ratio of not higher than 1% and comprising a nonmagnetic support in the form of a tape which has a heat shrinkage ratio of not higher than 1.8%, a Young's modulus of 450 to 650 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of 450 to 550 kg/mm.sup.2 in the width direction, and a magnetic recording layer provided on the support which comprises a binder and a ferromagnetic powder dispersed therein and has a squareness ratio of not less than 0.89. All the heat shrinkage ratios are values determined after being allowed to stand at 110.degree. C. for 4 hours.

    摘要翻译： 具有不高于1％的热收缩率的磁记录介质，其包含热收缩率不高于1.8％的带状非磁性载体，杨氏模量为450至650kg / mm2， 长度方向和宽度方向的杨氏模量为450〜550kg / mm2，以及设置在载体上的磁记录层，其包含粘合剂和分散在其中的铁磁性粉末，并且具有不小于0.89的矩形比。 所有的热收缩率都是在110℃下放置4小时后确定的值。

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

    公开(公告)号：US4865924A

    公开(公告)日：1989-09-12

    申请号：US183952

    申请日：1988-04-20

    申请人： Shinji Saito ,  Chiaki Mizuno ,  Toshio Ono ,  Hiroshi Ogawa

    发明人： Shinji Saito ,  Chiaki Mizuno ,  Toshio Ono ,  Hiroshi Ogawa

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/702 ,  G11B5/716

    CPC分类号： G11B5/7023 ,  G11B5/7022 ,  Y10S428/90 ,  Y10T428/257

    摘要： A magnetic recording medium comprises a nonmagnetic support, a first magnetic recording layer and a second magnetic recording layer, superposed in order, wherein each of binders contained in said first and second magnetic recording layers comprises a polymer, and the polymer contained in the second magnetic recording layer has a polymerization degree of not less than 250, said polymerization degree being more than that of the polymer contained in the first magnetic recording layer by at least as much as 20.

    摘要翻译： 磁记录介质包括依次重叠的非磁性载体，第一磁记录层和第二磁记录层，其中包含在所述第一和第二磁记录层中的每种粘合剂包括聚合物，并且包含在第二磁性体中的聚合物 记录层的聚合度不低于250，所述聚合度大于第一磁记录层中包含的聚合物的聚合度至少高达20。

    Method for preparing magnetic coating compositions
    7.
    发明授权
    Method for preparing magnetic coating compositions 失效
    磁性涂料组合物的制备方法

    公开(公告)号：US4952064A

    公开(公告)日：1990-08-28

    申请号：US459174

    申请日：1989-12-29

    申请人： Toshio Ono ,  Chiaki Mizuno ,  Yasuo Tamai ,  Hiroshi Ogawa

    发明人： Toshio Ono ,  Chiaki Mizuno ,  Yasuo Tamai ,  Hiroshi Ogawa

    IPC分类号： B01F3/12

    CPC分类号： B01F3/1207

    摘要： A single two-shaft continuous kneading and mixing machine, which is provided with a pair of shafts having blade members secured thereto, and a barrel accommodating the shafts such that they can be rotated, carries out kneading of a mixture of magnetic grains and a solution, which contains a binder in an organic solvent, in a normal kneading region and thereafter carries out dilution kneading of the mixture, which resulted after kneading in the normal kneading region was carried out, and an organic solvent in a dilution kneading region. The solids concentration in the mixture subjected to kneading in the normal kneading region is adjusted so that it falls within the range of 65 to 95 wt %. The solids concentration in the mixture subjected to dilution kneading is adjusted so that it falls within the range of 30 to 60 wt %. The width of a gap between blade members, which are secured to different shafts and which face each other, and the width of a gap between each blade member and the inner surface of the barrel in the dilution kneading region are made smaller than the widths of corresponding gaps in the normal kneading region.

    摘要翻译： 具有固定有刀片部件的一对轴的单个双轴连续捏和混合机和容纳轴的滚筒使其能够转动，进行磁性粒子和溶液的混合的捏合 在正常捏合区域中含有有机溶剂中的粘合剂，然后进行在正常混炼区域​​中捏合后混合物的稀释混炼和稀释混炼区域中的有机溶剂。 调整在正常捏合区域中进行捏合的混合物中的固体浓度，使其在65〜95重量％的范围内。 调整进行稀释混炼的混合物中的固体浓度，使其在30〜60重量％的范围内。 固定在不同轴上并且彼此面对的叶片构件之间的间隙的宽度以及稀释混合区域中的每个叶片构件和筒的内表面之间的间隙的宽度被制成小于 正常捏合区域中的相应间隙。

    Magnetic recording medium
    8.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4649081A

    公开(公告)日：1987-03-10

    申请号：US787776

    申请日：1985-10-15

    申请人： Hiroshi Ogawa ,  Shinji Saito ,  Chiaki Mizuno ,  Yasuo Tamai

    发明人： Hiroshi Ogawa ,  Shinji Saito ,  Chiaki Mizuno ,  Yasuo Tamai

    IPC分类号： G11B5/708 ,  C09D5/23 ,  C09D7/12 ,  G11B5/71 ,  G11B5/73

    CPC分类号： G11B5/71 ,  Y10S428/90 ,  Y10T428/31663

    摘要： A magnetic recording medium such as an audio-tape or a video-tape comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, which is characterized in that said magnetic recording layer comprises at least one modified silicon compound having molecular weight of less than 3,000 and at least one modified silicon compound having molecular weight of not less than 3,000.

    摘要翻译： 一种诸如音频带的磁记录介质或包括设置在所述支撑件上的非磁性支撑和磁记录层的录像带，所述磁记录层包括分散在粘合剂中的铁磁性粉末，其特征在于所述磁记录 层包含分子量小于3,000的至少一种改性硅化合物和至少一种分子量不小于3,000的改性硅化合物。