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公开(公告)号：US4439796A
公开(公告)日：1984-03-27
申请号：US329099
申请日：1981-12-09
申请人： Tatsuji Kitamoto , Goro Akashi
发明人： Tatsuji Kitamoto , Goro Akashi
CPC分类号： G11B5/716 , G11B5/714 , Y10T428/12049
摘要： A magnetic recording medium is described having formed on a non-magnetic base at least two magnetic layers, each of the magnetic layers comprising ferromagnetic particles dispersed in a binder, wherein the ferromagnetic particles in the outermost magnetic layer are substantially cubic particles and have a side length of 0.3.mu. or less, and the ferromagnetic particles in an underlying magnetic layer are acicular particles.
摘要翻译： 描述了一种在非磁性基底上形成至少两个磁性层的磁记录介质，每个磁性层包含分散在粘合剂中的铁磁颗粒，其中最外层磁性层中的铁磁性颗粒是基本上为立方体的颗粒， 长度为0.3μm以下，下面的磁性层中的铁磁性粒子为针状粒子。
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公开(公告)号：US4414271A
公开(公告)日：1983-11-08
申请号：US352220
申请日：1982-02-25
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/702 , G11B5/71 , G11B5/72 , G11B5/84 , G11B5/85 , G11B5/851 , B32B5/16
CPC分类号： G11B5/851 , G11B5/64 , G11B5/702 , G11B5/71 , Y10S428/90 , Y10T428/256 , Y10T428/265
摘要： A magnetic recording medium comprising a substrate, a thin magnetic metal film having spaced-apart columnar grains deposited on the substrate, and a crosslinked organic polymer formed from a polymerizable organic compound and a curing agent in the spaces between the columnar grains and integrated therewith. The medium is prepared by impregnating the spaces between the columnar grains with a polymerizable organic compound and a curing agent and curing them in the spaces by the crosslinking reaction.
摘要翻译： 一种磁记录介质，包括基材，沉积在基材上的具有间隔开的柱状晶粒的薄磁性金属膜和由可聚合有机化合物形成的交联的有机聚合物和柱状颗粒之间的空间中的固化剂并与其结合。 通过将柱状颗粒之间的空间与可聚合有机化合物和固化剂浸渍并通过交联反应在空间中固化来制备介质。
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公开(公告)号：US4409281A
公开(公告)日：1983-10-11
申请号：US255133
申请日：1981-04-17
申请人： Tatsuji Kitamoto , Goro Akashi
发明人： Tatsuji Kitamoto , Goro Akashi
CPC分类号： G11B5/716 , G11B5/66 , Y10S428/90 , Y10T428/24942 , Y10T428/265
摘要： A magnetic recording medium is described comprising a first layer comprising a magnetic iron oxide powder dispersed in a binder formed on a nonmagnetic support, a second layer formed on the first layer comprising a ferromagnetic metal powder dispersed in a binder, and having a greater coercive force than the first layer, and a third layer comprising a thin ferromagnetic metal film formed on the second layer in a thickness of from 0.01.mu. to 0.5.mu..
摘要翻译： 描述了一种磁记录介质，其包括：第一层，包括分散在形成在非磁性载体上的粘合剂中的磁性氧化铁粉末;第一层，形成在第一层上，包含分散在粘合剂中的强磁性金属粉末，并具有较大的矫顽力 以及第三层，其包含在0.01μm至0.5μm的厚度上形成在第二层上的薄铁磁性金属膜。
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公开(公告)号：US4397911A
公开(公告)日：1983-08-09
申请号：US276746
申请日：1981-06-24
申请人： Goro Akashi , Masaaki Fujiyama
发明人： Goro Akashi , Masaaki Fujiyama
CPC分类号： G11B23/50 , G11B5/41 , Y10S428/90 , Y10T428/25 , Y10T428/254 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/266 , Y10T428/31786 , Y10T428/31797
摘要： Cleaning tape having a cleaning layer formed on one or both sides of a base is disclosed. Said cleaning layer is composed of (1) a binder, (2) an organic polymer powder whose particle size is 3.mu. or more, and (3) an inorganic solid powder whose particle size is 3.mu. or less.
摘要翻译： 公开了具有形成在基座的一侧或两侧上的清洁层的清洁带。 所述清洗层由（1）粘合剂，（2）粒径为3μm以上的有机聚合物粉末和（3）粒径为3μm以下的无机固体粉末构成。
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公开(公告)号：US4343831A
公开(公告)日：1982-08-10
申请号：US243666
申请日：1981-03-13
申请人： Nobuo Tsuji , Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
发明人： Nobuo Tsuji , Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
CPC分类号： G11B5/842 , G11B5/7026
摘要： A process for producing a magnetic recording medium is described comprising applying to a support a coating solution which has ferromagnetic particles dispersed in a solution comprising a binder curable by electron beams and a low-boiling point solvent, irradiating the support with electron beam radiation while the particles remain dispersed uniformly, and evaporating the solvent to dryness.
摘要翻译： 一种磁记录介质的制造方法，其特征在于，在支撑体上涂布具有分散在由电子束和低沸点溶剂固化的粘合剂的溶液中的铁磁性粒子的涂布液， 颗粒保持均匀分散，蒸发溶剂至干。
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公开(公告)号：US4310599A
公开(公告)日：1982-01-12
申请号：US480332
申请日：1974-06-18
申请人： Goro Akashi , Masaaki Fujiyama
发明人： Goro Akashi , Masaaki Fujiyama
CPC分类号： G11B5/7305 , G11B5/72 , Y10S428/90 , Y10T428/31511 , Y10T428/31565 , Y10T428/31576 , Y10T428/31587 , Y10T428/31591 , Y10T428/31609 , Y10T428/31736 , Y10T428/31757 , Y10T428/31765 , Y10T428/31779 , Y10T428/31797 , Y10T428/31884 , Y10T428/31917 , Y10T428/3192 , Y10T428/31928
摘要： A magnetic recording element comprising a magnetic recording layer on a surface of a synthetic resin support and an antistatic layer on the opposite surface of said synthetic resin support, wherein said antistatic layer comprises a powder of a white or light-colored pigment and a powder of a carbon type electrically conductive substance in a binder, said pigment powder being substantially all in the outer surface portion of said antistatic layer and said electrically conductive powder being substantially all in the portion of said antistatic layer adjacent said support is disclosed.
摘要翻译： 一种磁性记录元件，包括在合成树脂载体的表面上的磁记录层和在所述合成树脂载体的相对表面上的抗静电层，其中所述抗静电层包含白色或浅色颜料的粉末和 公开了一种粘合剂中的碳型导电物质，所述颜料粉末基本上全部位于所述抗静电层的外表面部分中，并且所述导电粉末基本上全部位于与所述载体相邻的所述抗静电层的部分。
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公开(公告)号：US4273797A
公开(公告)日：1981-06-16
申请号：US30538
申请日：1979-04-16
IPC分类号： C09D177/00 , C09D127/06 , C09D163/00 , G11B5/708 , G11B5/73 , G11B5/735 , B05D5/12
摘要： A magnetic recording medium comprising a plastic film support having a magnetic recording layer on one side is provided with a backing layer containing: (1) a white and/or light colored powder; (2) carbon black and/or graphite; and (3) a polymeric binder. The backing layer transmits more than 3% of white light at a thickness of 2 microns and has a surface electrical resistance of less than 10.sup.10 .OMEGA./cm. Pinholes and drop-out are easily detected in forming such a magnetic recording medium.
摘要翻译： 包括在一侧具有磁记录层的塑料膜载体的磁记录介质设置有背衬层，其包含：（1）白色和/或浅色粉末; （2）炭黑和/或石墨; 和（3）聚合物粘合剂。 背衬层以2微米的厚度透过超过3％的白光，其表面电阻小于1010欧米加/厘米。 在形成这种磁记录介质时容易检测出针孔和脱落。
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公开(公告)号：US4267207A
公开(公告)日：1981-05-12
申请号：US39028
申请日：1979-05-14
CPC分类号： G11B5/70694 , C01G49/02 , G11B5/70642 , C01P2006/42
摘要： A process for producing a cobalt-containing ferromagnetic iron oxide powder suitable for magnetic recording which comprises(a) mixing cobalt ion, ferrous ion and an alkali with an aqueous dispersion of acicular ferromagnetic iron oxide nuclei under non-oxidizing conditions at a temperature of about 50.degree. C. or less;(b) heating the dispersion to a temperature of at least about 60.degree. C. but below the boiling point of the dispersion under non-oxidizing conditions to cause a reaction; and(c) treating the dispersion at a temperature of at least about 60.degree. C. but below the boiling point of the dispersion under the following conditions:(1) initially treating the dispersion under non-oxidizing conditions for about 5 minutes or more;(2) subsequentially treating the dispersion under oxidizing conditions for about 5 minutes or more prior to the termination of the reaction; and(3) a total treating time under non-oxidizing conditions and oxidizing conditions of at least about 30 minutes.
摘要翻译： 一种适用于磁记录的含钴铁磁性氧化铁粉末的制造方法，其特征在于，包括：（a）在非氧化条件下，将钴离子，亚铁离子和碱与针状铁磁性氧化铁核的水分散体混合， 50℃以下; （b）在非氧化条件下将分散体加热到至少约60℃但低于分散体的沸点以引起反应; 和（c）在以下条件下，在至少约60℃但低于分散体沸点的温度下处理分散体：（1）最初在非氧化条件下处理分散体约5分钟或更长时间; （2）在反应终止之前，在氧化条件下将分散体顺序处理约5分钟或更长时间; 和（3）在非氧化条件和氧化条件下的总处理时间为至少约30分钟。
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公开(公告)号：US4260466A
公开(公告)日：1981-04-07
申请号：US771583
申请日：1977-02-24
CPC分类号： G11B5/8416 , C23C14/06 , G11B5/851 , Y10S428/90 , Y10T428/31721
摘要： A method of producing a magnetic recording layer on a support comprising simultaneously depositing a ferromagnetic material and a polymer on a support using a vapor deposition technique such as vacuum deposition, sputtering, etc., thereby to produce thereon a magnetic recording layer of a composite film of the ferromagnetic material and the polymer. A further embodiment for producing a magnetic recording layer comprises simultaneously depositing a ferromagnetic material and a monomer or oligomer on the support using a vapor deposition technique, polymerizing the deposited layer, e.g., using a polymerization catalyst or by applying ionizing or electromagnetic rays thereto, to form a composite film of the ferromagnetic material and the polymer. The magnetic recording layer thus obtained in either embodiment can be used for high density recording.
摘要翻译： 一种在支撑体上制造磁记录层的方法，包括使用诸如真空沉积，溅射等的气相沉积技术在载体上同时沉积铁磁材料和聚合物，从而在其上制备复合膜的磁记录层 的铁磁材料和聚合物。 用于制造磁记录层的另一实施例包括使用气相沉积技术同时在支撑体上沉积铁磁材料和单体或低聚物，使沉积层聚合，例如使用聚合催化剂或通过向其施加电离或电磁辐射至 形成铁磁材料和聚合物的复合膜。 这样获得的磁记录层可用于高密度记录。
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公开(公告)号：US4091158A
公开(公告)日：1978-05-23
申请号：US676177
申请日：1976-04-12
申请人： Akira Kasuga , Goro Akashi , Osamu Suzuki
发明人： Akira Kasuga , Goro Akashi , Osamu Suzuki
CPC分类号： G11B5/716 , Y10S428/90 , Y10T428/24975 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording member comprising a non-magnetic support and two or more magnetic layers provided on the non-magnetic support and composed mainly of a ferromagnetic fine powder and a binder. The upper layer of the magnetic layers has a dry thickness of about 0.3 to about 2.5 .mu.m and the ferromagnetic fine powder contained in the upper layer is ferromagnetic iron oxide having an APP value of not more than about 1.0 and a coercive force of about 300 to about 500 Oe.
摘要翻译： 一种磁记录元件，包括非磁性载体和设置在非磁性载体上的两个或多个磁性层，主要由铁磁性细粉末和粘合剂组成。 磁性层的上层具有约0.3至约2.5μm的干厚度，并且上层中所含的铁磁性细粉末是具有不大于约1.0的APP值和约300的矫顽力的铁磁性氧化铁 至约500 Oe。
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