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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
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。
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公开(公告)号：US4666754A
公开(公告)日：1987-05-19
申请号：US746639
申请日：1985-06-20
申请人： Hiroyuki Arioka , Hideki Ishizaki , Toshiaki Ide
发明人： Hiroyuki Arioka , Hideki Ishizaki , Toshiaki Ide
CPC分类号： G11B5/72 , Y10S428/90 , Y10T428/24355 , Y10T428/25
摘要： A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on the substrate, and a top coating layer formed on the magnetic recording layer, wherein the top coating layer contains a fine particulate pigment at its surface, and the surface roughness (R20) of the top coating layer is less than 400 .ANG..
摘要翻译： 一种磁记录介质，包括非磁性基板，形成在基板上的磁记录层和形成在磁记录层上的顶涂层，其中顶涂层在其表面含有细颗粒颜料，表面粗糙度 顶层涂层的（R20）小于400。
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公开(公告)号：US4639389A
公开(公告)日：1987-01-27
申请号：US680889
申请日：1984-12-12
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。
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公开(公告)号：US4693934A
公开(公告)日：1987-09-15
申请号：US738780
申请日：1985-05-29
CPC分类号： G11B5/7305 , G11B5/72 , Y10S428/90 , Y10T428/265
摘要： Magnetic recording tape comprising a ferromagnetic thin film on a non-magnetic base and having good running stability and low output fluctuation, clogging, and dropout can be obtained by making the stiffness of the overall tape0.149.times.wa.sup.3 /dxb=0.02 to 0.12 g mmwhereinw: load (g)a: radius of tape ring (mm)b: tape width (mm)d: deformation of tape ring (mm)The stiffness in the above formula can be determined by the method described in the specification.
摘要翻译： 可以通过使整个带0.149xwa3 / dxb的刚度= 0.02至0.12gmm来获得在非磁性基底上包含铁磁薄膜并具有良好的运行稳定性和低输出波动，堵塞和脱落的磁记录带，其中 w：负载（g）a：带环半径（mm）b：带宽（mm）d：带环变形（mm）上述公式中的刚度可以通过说明书中描述的方法来确定。
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公开(公告)号：US4587150A
公开(公告)日：1986-05-06
申请号：US636497
申请日：1984-08-01
IPC分类号： C09D127/06 , C09D101/12 , C09D175/04 , G11B5/64 , G11B5/72 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , G11B5/72 , Y10S428/90 , Y10T428/24355 , Y10T428/24372 , Y10T428/25 , Y10T428/30
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 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 60 m.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分散在树脂中，表面粗糙度为0.05-0.4μm，所述炭黑通过电子显微镜测得的平均粒度为10至60μm。
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公开(公告)号：US4592942A
公开(公告)日：1986-06-03
申请号：US652575
申请日：1984-09-20
IPC分类号： G11B5/66 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/04 , C09D175/14 , G11B5/64 , G11B5/725 , G11B5/73 , G11B5/735 , G11B5/72
CPC分类号： G11B5/725 , G11B5/735 , Y10S428/90 , Y10T428/24355 , Y10T428/24413 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/30
摘要： A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on one side of the substrate and a back coating layer on the other side of the substrate, characterized in that the back coating layer is a coating composed essentially of carbon black, a resin binder and a lubricant, the weight ratio of the carbon black to the binder being from 1:1 to 1:4, and the carbon black having a particle size of from 10 to less than 100 m.mu.m.
摘要翻译： 一种磁记录介质，其特征在于，包括非磁性基板，形成在所述基板的一侧的磁记录层和所述基板的另一侧上的背涂层，其特征在于，所述背涂层是基本上由碳黑 ，树脂粘合剂和润滑剂，碳黑与粘合剂的重量比为1：1〜1：4，碳黑的粒径为10〜小于100μm。
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公开(公告)号：US4547419A
公开(公告)日：1985-10-15
申请号：US632115
申请日：1984-07-18
CPC分类号： G11B5/714 , G11B5/735 , Y10S428/90 , Y10T428/24942 , Y10T428/256
摘要： A magnetic recording medium which comprises a plastic base film and a magnetic layer formed on one side of the base film and composed of a ferromagnetic alloy powder dispersed in a resin binder, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g 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 a radiation-cured backing layer made of a radiation sensitive resin and having a surface roughness of from 0.05 to 0.6 .mu.m is formed on the other side of the base film.
摘要翻译： 一种磁记录介质，包括塑料基膜和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，其特征在于所述铁磁性合金粉末的表面积至少为48 m 2 / g，所述磁性层具有至少1000Oe的矫顽力和至多0.08μm的表面粗糙度，以及由辐射敏感树脂制成的具有表面粗糙度的辐射固化背衬层 在基膜的另一面上形成0.05〜0.6μm。
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8.发明授权
公开(公告)号：US4946729A
公开(公告)日：1990-08-07
申请号：US654364
申请日：1984-09-26
IPC分类号： C08G18/62 , C08G18/67 , C09D4/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/64 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , C08G18/6212 , C08G18/672 , C09D4/00 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/31609
摘要： A back coating resin composition for a magnetic recording medium comprising:(A) a plastic compound having a molecular weight of from 5,000 to 100,000 and containing at least two radiation-curable unsaturated double bonds;(B) a rubber-like compound having a molecular weight of from 3,000 to 100,000 and containing at least one radiation-curable unsaturated double bond or containing no such double bond; and(C) a compound having a molecular weight of from 200 to 3,000 and containing at least one radiation-curable unsaturated double bond.
摘要翻译： 一种用于磁记录介质的背涂树脂组合物，包括：（A）分子量为5,000至100,000并含有至少两个可辐射固化的不饱和双键的塑料化合物; （B）分子量为3,000〜100,000的橡胶状化合物，含有至少一个可辐射固化的不饱和双键或不含这样的双键; 和（C）分子量为200-3000并含有至少一个可辐射固化的不饱和双键的化合物。
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公开(公告)号：US4618535A
公开(公告)日：1986-10-21
申请号：US642208
申请日：1984-08-20
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。
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公开(公告)号：US4950535A
公开(公告)日：1990-08-21
申请号：US281936
申请日：1988-12-06
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。
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