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公开(公告)号：US4666770A
公开(公告)日：1987-05-19
申请号：US753829
申请日：1985-07-11
申请人： Takamitsu Asai , Masaaki Fujiyama
发明人： Takamitsu Asai , Masaaki Fujiyama
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , G11B5/70 , G11B5/706 , G11B5/708
CPC分类号： G11B5/708 , G11B5/70 , G11B5/70678 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording medium having an improved surface smoothness of the coating layer, improved degree of orientation in a magnetic field and increased output is provided which comprises a non-magnetic support and a magnetic recording layer provided thereon containing a ferromagnetic substance of plate-shaped hexagonal system, and having a surface gloss value of 180% or more.
摘要翻译： 提供了具有改善的涂层表面平滑度，改善的磁场取向度和增加的输出的磁记录介质，其包括非磁性载体和设置在其上的磁记录层，其上含有板状六边形的铁磁性物质 并且具有180％或更高的表面光泽度值。
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公开(公告)号：US4657814A
公开(公告)日：1987-04-14
申请号：US553945
申请日：1983-11-21
申请人： Takamitsu Asai , Masaaki Fujiyama
发明人： Takamitsu Asai , Masaaki Fujiyama
CPC分类号： G11B5/70678 , G11B5/714 , G11B5/7305 , Y10S428/90 , Y10T428/257 , Y10T428/265 , Y10T428/31678 , Y10T428/31681 , Y10T428/31786
摘要： A magnetic recording medium is disclosed. The medium is comprised of a support base having provided thereon a non-magnetic metal layer and a magnetic layer. The magnetic layer is comprised of plate-shaped magnetic particles having an axis of easy magnetization perpendicular to the plane of the plate-shaped magnetic particles dispersed in a binder. The non-magnetic metal layer is preferably comprised of a metal selected from the group consisting of Al, Cu, Zn, Sn, Ti and alloys thereof. The recording medium has high S/N ratio, reduced drop out, high output, excellent durability and running properties.
摘要翻译： 公开了一种磁记录介质。 介质由其上设置有非磁性金属层和磁性层的支撑基底构成。 磁性层由具有垂直于分散在粘合剂中的板状磁性颗粒的平面的容易磁化的轴的板状磁性颗粒构成。 非磁性金属层优选由选自Al，Cu，Zn，Sn，Ti及其合金的金属组成。 记录介质具有高S / N比，降低的降低，高输出，优异的耐久性和运行性能。
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公开(公告)号：US4678706A
公开(公告)日：1987-07-07
申请号：US791174
申请日：1985-10-24
IPC分类号： C10M103/02 , C09D5/23 , C09D101/18 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C10M103/06 , C10N10/04 , C10N10/08 , C10N40/18 , G11B5/73 , G11B5/735 , G11B5/72
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/258 , Y10T428/265
摘要： A magnetic recording medium is described, comprising a non-magnetic support, a magnetic recording layer on one side of the support, and a backing layer on the opposite side of the support to the magnetic recording layer, wherein said backing layer comprising a binder and a powder dispersed in the binder, wherein the powder is a powdered oxide represented by the formula M.sup.1.M.sup.2.O.sub.2+x (wherein M.sup.1 is at least one element selected from the group consisting of Ba, Sr, Pb and Ca, M.sup.2 is at least one element selected from the group consisting of Ti, Zr and Sn, and x is in the range of from 0 to 0.9) or a mixture of said powdered oxide and carbon black. This magnetic recording medium has a decreased coefficient of friction, is free from formation of scratches, has good durability, and furthermore, maintains good S/N characteristics.
摘要翻译： 描述了一种磁记录介质，其包括非磁性支撑体，在支撑体的一侧上的磁记录层，以及位于与磁记录层的支撑体相反侧的背衬层，其中所述背衬层包括粘合剂和 分散在所述粘合剂中的粉末，其中所述粉末是由式M1.M2.O 2 + x（其中M1是选自Ba，Sr，Pb和Ca，M2中的至少一种元素）所代表的粉末状氧化物 至少一种选自Ti，Zr和Sn的元素，x在0至0.9的范围内）或所述粉末状氧化物和炭黑的混合物。 该磁记录介质具有降低的摩擦系数，没有形成划痕，具有良好的耐久性，并且还保持良好的S / N特性。
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4.发明授权
公开(公告)号：US4629653A
公开(公告)日：1986-12-16
申请号：US677407
申请日：1984-12-03
申请人： Takamitsu Asai , Masaaki Fujiyama , Minoru Kanazawa , Nobuo Aoki
发明人： Takamitsu Asai , Masaaki Fujiyama , Minoru Kanazawa , Nobuo Aoki
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/08 , G11B5/706 , G11B5/708 , G11B5/714
CPC分类号： G11B5/714 , G11B5/70678 , Y10S428/90 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, wherein said ferromagnetic particles have a tabular ratio (table diameter/table thickness) of 2 or more, a table diameter of from 0.01 to 10 .mu.m, and a lamination degree of the magnetic particles in the magnetic layer in a cross-section thereof of 2 or more.
摘要翻译： 描述了一种磁记录介质，其包括在其上设置有含有铁磁颗粒和粘合剂的磁性层的非磁性载体，其中所述铁磁颗粒具有2或更大的平板比（表直径/台厚度），表直径 0.01〜10μm，磁性层的磁性粒子的横截面为2以上的层叠度。
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公开(公告)号：US4911997A
公开(公告)日：1990-03-27
申请号：US080178
申请日：1987-07-31
申请人： Takamitsu Asai , Masaaki Fujiyama
发明人： Takamitsu Asai , Masaaki Fujiyama
CPC分类号： G11B5/716 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium whose output is increased over a wide range of from long wavelengths to short wavelengths and whose output fluctuation with rotation period is decreased when rotating and reproducing in the form of a disk is provided comprising a non-magnetic support and a magnetic layer provided thereon containing a ferromagnetic substance, the magnetic layer having a multilayer structure consisting of a lower layer containing a ferromagnetic substance in an ellipsoidal shape with ##EQU1## and a saturation magnetization of at least 60 emu/g and an upper layer containing a ferromagnetic substance of plate-shaped hexagonal system having the axis of easy magnetization in the vertical direction to the plate surface.
摘要翻译： 一种磁记录介质，其在从长波长到短波长的宽范围内增加输出，并且当以盘的形式旋转和再现时，其旋转周期的输出波动减小，包括非磁性支撑和磁性层 在其上设置有含有铁磁物质的磁性层，该磁性层具有多层结构，该多层结构由含有椭圆形状的铁磁物质和至少60emu / g的饱和磁化强度的下层组成，上层含有铁磁性物质 具有在与板表面垂直的方向上容易磁化的轴的板状六边形系统。
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公开(公告)号：US4552808A
公开(公告)日：1985-11-12
申请号：US554658
申请日：1983-11-23
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , G11B5/706 , G11B5/714 , G11B5/73 , G11B5/68
CPC分类号： G11B5/70678 , G11B5/714 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/31
摘要： A magnetic recording material is disclosed which is comprised of a single magnetic layer comprised of plate-shaped ferromagnetic particles wherein the plate-shaped ferromagnetic particles are present in greater number in the surface part of the magnetic layer than in the inner part and/or the plate-shaped ferromagnetic particles are aligned such that an average horizontal axis component of the particles with respect to the surface of magnetic layer is larger in the surface part than in the inner part. The location and alignment of the particles make is possible to increase output with short-wave recording.
摘要翻译： 公开了一种磁记录材料，其由包括板状铁磁性颗粒的单个磁性层组成，其中板状铁磁性颗粒在磁性层的表面部分中比在内部部分和/或 排列板状铁磁性粒子，使得颗粒相对于磁性层表面的平均水平轴分量在表面部分比在内部部分大。 颗粒的位置和排列可以通过短波记录来增加输出。
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公开(公告)号：US4740419A
公开(公告)日：1988-04-26
申请号：US878742
申请日：1986-06-26
申请人： Takamitsu Asai , Masaaki Fujiyama , Haruo Masuda
发明人： Takamitsu Asai , Masaaki Fujiyama , Haruo Masuda
CPC分类号： G11B5/70678 , G11B5/714 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording medium is described which has, on a non-magnetic support, a magnetic layer comprising a ferromagnetic substance dispersed in a binder, wherein the ferromagnetic substance is a hexagonal tabular ferromagnetic substance having an axis of easy magnetization in the direction perpendicular to the plain thereof and the ratio of the bulk density to true density (bulk densy/true density) is at least 0.16. The magnetic recording medium has improved output and C/N.
摘要翻译： 描述了一种磁性记录介质，其在非磁性载体上具有包含分散在粘合剂中的铁磁性物质的磁性层，其中该铁磁性物质是六方片状铁磁性物质，其具有在垂直于该载体的方向上易磁化的轴 其体积密度与真密度（体积密度/真密度）之比至少为0.16。 磁记录介质具有改善的输出和C / N。
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公开(公告)号：US4657813A
公开(公告)日：1987-04-14
申请号：US714282
申请日：1985-03-21
申请人： Takamitsu Asai , Masaaki Fujiyama
发明人： Takamitsu Asai , Masaaki Fujiyama
CPC分类号： G11B5/714 , G11B5/70673 , G11B5/70678 , Y10S428/90 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer containing magnetic particles and a binder, wherein the magnetic particles comprise (1) ferromagnetic hexagonal crystallized tabular shape particles having an axis of easy magnetization in a direction vertical to the tabular plane thereof and (2) ferromagnetic ellipsoidal particles having an acicular ratio (length/width) of 1.5/1 to 10/1 and having a saturation magnetization of 60 emu/g or more.
摘要翻译： 描述了一种磁记录介质，其包括在其上设置有包含磁性颗粒和粘合剂的磁性层的非磁性载体，其中所述磁性颗粒包括（1）在垂直方向上具有容易磁化轴的铁磁六方晶系结晶的平板状颗粒 （2）具有1.5 / 1〜10/1的针状比（长/宽），饱和磁化强度为60emu / g以上的铁磁性椭圆体颗粒。
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公开(公告)号：US4656088A
公开(公告)日：1987-04-07
申请号：US768608
申请日：1985-08-23
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/258
摘要： A magnetic recording medium is disclosed. The medium comprises a non-magnetic support having provided thereon a magnetic layer comprising a binder, a magnetic powder and a powder of an oxide represented by the formula:M-1.multidot.M-2.multidot.O.sub.2+xwherein M-1 is at least one of barium, strontium, lead and calcium; M-2 is at least one member of titanium, zirconium and tin; and x represents a number of from 0 to 0.9. The medium has a high S/N ratio and improved wear resistance and causes only moderate wear of a magnetic head.
摘要翻译： 公开了一种磁记录介质。 介质包括非磁性载体，其上设置有包含粘合剂，磁性粉末和由下式表示的氧化物粉末的磁性层：M-1×2M-2xO2 + x，其中M-1是钡， 锶，铅和钙; M-2是钛，锆和锡中的至少一种; x表示0〜0.9的数。 该介质具有高的S / N比和改进的耐磨性，并且仅导致磁头的适度的磨损。
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公开(公告)号：US4726992A
公开(公告)日：1988-02-23
申请号：US873922
申请日：1986-06-13
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D169/00 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/706 , G11B5/70
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/31507 , Y10T428/31551 , Y10T428/31609
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer having magnetic particles being ferromagnetic hexagonal crystallized tabular shape particles having an axis of easy magnetization in a direction vertical to a flat surface thereof, said binder being present in an amount of from 10 to 30 wt % based on the weight of the magnetic particles, and said binder comprising a polycarbonate polyurethane being present in an amount of from 20 to 60 wt %, a vinyl chloride and vinyl acetate type copolymer being present in an amount of from 20 to 70 wt %, and a polyisocyanate being present in an amount of from 10 to 60 wt %, based on the total amount of binder.
摘要翻译： 描述了一种磁记录介质，其包括非磁性载体，其上设置有磁性层，该磁性层具有铁磁性六方晶系结晶的平板状颗粒，该磁性颗粒在垂直于其平坦表面的方向上具有容易磁化的轴线，所述粘合剂存在于 相对于磁性粒子的重量为10〜30重量％，所述粘合剂含有聚碳酸酯聚氨酯，其含量为20〜60重量％，氯乙烯和乙酸乙烯酯型共聚物存在于 的量为20至70重量％，多异氰酸酯的存在量为基于粘合剂总量的10至60重量％。
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