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公开(公告)号：US4251843A
公开(公告)日：1981-02-17
申请号：US075546
申请日：1979-09-14
IPC分类号： G11B23/033 , G11B23/50 , G11B23/02 , G11B5/00
CPC分类号： G11B23/0332 , G11B23/505
摘要： The inner surface of a disc jacket for retaining a magnetic recording disc is provided with a fibrous layer containing an antistatic agent. The fibrous layer is composed of a nonwoven cloth impregnated with the antistatic agent. The antistatic agent may be applied to the nonwoven cloth by spraying instead of impregnation.
摘要翻译： 用于保持磁记录盘的盘套的内表面设置有含有抗静电剂的纤维层。 纤维层由浸渍有抗静电剂的无纺布组成。 可以通过喷涂而不是浸渍将抗静电剂施加到无纺布上。
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公开(公告)号：US4333988A
公开(公告)日：1982-06-08
申请号：US74469
申请日：1979-09-11
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A recording medium and, more particularly, a recording medium based on a composition exhibiting high dispersibility for finely-divided ferromagnetic powders having excellent abrasion resistance is disclosed in which the magnetic composition comprises a finely-divided ferromagnetic powders dispersed in a binder containing 2-chloroacrylonitrile polymer and a polyurethane prepolymer; in another embodiment of the invention the magnetic composition additionally contains a polyisocyanate compound.
摘要翻译： 更具体地说，记录介质，特别是基于对具有优异耐磨性的细碎铁磁粉末显示高分散性的组合物的记录介质，其中磁性组合物包含分散在含有2-氯丙烯腈的粘合剂中的细碎铁磁粉末 聚合物和聚氨酯预聚物; 在本发明的另一个实施方案中，磁性组合物另外含有多异氰酸酯化合物。
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公开(公告)号：US4106067A
公开(公告)日：1978-08-08
申请号：US724430
申请日：1976-09-17
CPC分类号： G11B5/41
摘要： A cleaning jacket for a magnetic head used for flexible discs comprising a cleaning sheet and a sheet retaining jacket, the cleaning sheet comprising a flexible and non-magnetizable support, at least on one surface of which is provided an antistatic layer and on the other surface of which is provided a cleaning layer of a fibrous material, the retaining jacket having the shape of a flat casing and defining a space in which the cleaning sheet can be kept in such a manner that it can rotate freely therein, and, further, having a lubricating layer provided on the inner wall thereof facing the antistatic layer of the cleaning sheet.
摘要翻译： 一种用于用于柔性盘的磁头的清洁护套，包括清洁片和片材保持护套，所述清洁片包括柔性和不可磁化的支撑件，至少在其一个表面上设置有抗静电层，并且在另一表面上 其中提供了纤维材料的清洁层，该保持套具有扁平壳体的形状，并且限定了可以以可自由旋转的方式保持清洁片的空间，并且还具有 设置在面向清洁片的抗静电层的内壁上的润滑层。
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公开(公告)号：US4336308A
公开(公告)日：1982-06-22
申请号：US74467
申请日：1979-09-11
申请人： Yasuyuki Yamada , Kenichi Masuyama , Nobuo Tsuji
发明人： Yasuyuki Yamada , Kenichi Masuyama , Nobuo Tsuji
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium and, more particularly, a magnetic recording medium based on a magnetic composition exhibiting high dispersibility of finely divided ferromagnetic powders and having excellent abrasion resistance is disclosed wherein the binder for the magnetic composition contains a 2-chloroacrylonitrile polymer and a thermoplastic polyurethane resin; in another embodiment of the invention the binder additionally contains a polyisocyanate.
摘要翻译： 公开了一种磁记录介质，更具体地说，一种磁性组合物的粘结剂含有2-氯丙烯腈聚合物和热塑性聚氨酯的磁性组合物，该磁性组合物表现出高分散性的铁磁性粉末并具有优异的耐磨性 树脂; 在本发明的另一个实施方案中，粘合剂另外含有多异氰酸酯。
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公开(公告)号：US4780365A
公开(公告)日：1988-10-25
申请号：US19286
申请日：1987-02-26
IPC分类号： C09D101/18 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/265
摘要： In a magnetic recording medium comprising a nonmagnetic support, a magnetic recording layer provided on one surface of said support and a back layer containing carbon black provided on another surface of said support, the improvement wherein said back layer has thickness of not larger than 0.6 .mu.m and contains an inorganic filler powder having a Mohs' scale of hardness of not less than 5, a mean particle diameter of smaller than the thickness of the back layer and not smaller than 1/5 of the thickness thereof, and the maximum particle diameter of not larger than 11/10 of the thickness of the back layer.
摘要翻译： 在包括非磁性载体的磁记录介质中，设置在所述载体的一个表面上的磁记录层和设置在所述载体的另一表面上的含有炭黑的背层，其中所述背层的厚度不大于0.6μm 并且含有莫氏硬度不小于5的无机填料粉末，平均粒径小于背层厚度，不小于其厚度的1/5，最大粒径 不大于背层厚度的11/10。
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公开(公告)号：US4614685A
公开(公告)日：1986-09-30
申请号：US598093
申请日：1984-04-09
申请人： Katsumi Ryoke , Kenichi Masuyama , Eiichi Tadokoro
发明人： Katsumi Ryoke , Kenichi Masuyama , Eiichi Tadokoro
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium comprised of a non-magnetic support base having a magnetic layer provided thereon is disclosed. The magnetic layer is comprised of carbon black having an average particle size of 30 to 50 m.mu. and an iron oxide which contains Co. The iron oxide containing the Co has a specific surface area of 25 m.sup.2 /g or more. The carbon black and the iron oxide containing the Co are dispersed in a binder. By utilizing the particular type of carbon black in combination with the particular iron oxide containing Co in the magnetic layer it is possible to greatly improve the running characteristics of the magnetic recording medium as well as obtain an improved RF output.
摘要翻译： 公开了一种磁记录介质，其包括具有设置在其上的磁性层的非磁性支撑基底。 磁性层由平均粒径为30〜50μm的碳黑和含有Co的氧化铁构成。含有Co的氧化铁的比表面积为25m 2 / g以上。 含有Co的炭黑和氧化铁分散在粘合剂中。 通过将特定类型的炭黑与在磁性层中含有Co的特定氧化铁组合使用，可以极大地改善磁记录介质的运行特性并获得改进的RF输出。
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公开(公告)号：US4626469A
公开(公告)日：1986-12-02
申请号：US505505
申请日：1983-06-17
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording material, which comprises a magnetic layer coated on a non-magnetic support is disclosed. The magnetic layer contains both carbon black fine powder having a mean primary grain size of less than 10 m.mu. and carbon black coarse powder having a mean primary grain size in the range of 50 to 120 m.mu. in a mixing ratio ranging from 95/5 to 5/95. The material is improved in both RF output and audio output.
摘要翻译： 公开了一种磁记录材料，其包括涂覆在非磁性载体上的磁性层。 磁性层含有平均一次粒径小于10μm的炭黑细粉末和平均一次粒径在50〜120μm的范围内的混合比例为95/5的碳黑粗粉末 至5/95。 该材料在射频输出和音频输出两方面得到改进。
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公开(公告)号：US4551386A
公开(公告)日：1985-11-05
申请号：US596776
申请日：1984-04-04
申请人： Nobutaka Yamaguchi , Shinobu Iida , Masahiro Utsumi , Toshimitu Okutu , Kenichi Masuyama , Eiichi Tadokoro
发明人： Nobutaka Yamaguchi , Shinobu Iida , Masahiro Utsumi , Toshimitu Okutu , Kenichi Masuyama , Eiichi Tadokoro
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording material comprised of a non-magnetic support base having provided thereon a magnetic recording layer on one side and the back layer on the other side is disclosed. The magnetic recording layer is comprised of ferromagnetic particles dispersed in a binder in combination with carbon black particles having an average primary particle size of 30 .mu.m or less. The back layer is comprised of a binder having dispersed therein carbon black having an average primary particle size in the range of 50 to 150 m.mu.. The magnetic recording material has improved electromagnetic properties and improved durability, particularly with respect to video S/N and dropout.
摘要翻译： 公开了一种磁记录材料，其包括在一侧上设置有磁记录层的非磁性支撑基底和另一侧上的背层。 磁记录层由分散在粘合剂中的铁磁颗粒与平均一次粒径为30μm以下的炭黑颗粒组合而成。 背层由其中分散有平均一次粒径在50-150μm的碳黑的粘合剂组成。 磁记录材料具有改进的电磁特性和改善的耐久性，特别是在视频S / N和压差方面。
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公开(公告)号：US4539257A
公开(公告)日：1985-09-03
申请号：US599917
申请日：1984-04-13
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/265
摘要： A magnetic recording medium comprised of a nonmagnetic support base having a magnetic layer provided thereon is disclosed. The magnetic layer includes ferromagnetic particles dispersed in a binder in combination with carbon black particles. The carbon black particles have an average primary particle size in the range of 30 m.mu. to 50 m.mu.. Further, the carbon black is capable of the adsorption of 120 ml or more of dibutyl phthalate per 100 g of carbon black. By utilizing the particular carbon black of the present invention it is possible to obtain a magnetic recording medium having improved running properties.
摘要翻译： 公开了一种由其上设置有磁性层的非磁性支撑基体构成的磁记录介质。 磁性层包括分散在粘合剂中的炭黑颗粒与炭黑颗粒的组合。 炭黑粒子的平均一次粒径在30μm〜50μm的范围内。 此外，炭黑能够每100g炭黑吸附120ml或更多的邻苯二甲酸二丁酯。 通过利用本发明的特定炭黑，可以获得具有改善的运行特性的磁记录介质。
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公开(公告)号：US5904979A
公开(公告)日：1999-05-18
申请号：US602567
申请日：1996-02-14
申请人： Yutaka Kakuishi , Kenichi Masuyama , Kiyomi Ejiri
发明人： Yutaka Kakuishi , Kenichi Masuyama , Kiyomi Ejiri
CPC分类号： G11B5/738 , G11B5/712 , Y10S428/90 , Y10S977/932 , Y10T428/265 , Y10T428/2991 , Y10T428/31935
摘要： (1) A magnetic recording system is disclosed, which comprises a thin-film magnetic head and a magnetic recording medium comprising a nonmagnetic support having thereon a magnetic layer comprising mainly ferromagnetic particles and a binder resin, wherein said binder resin comprising mainly a vinyl chloride resin, and said ferromagnetic particles are surface-treated with at least an organic compound. (2) Another magnetic recording system is disclosed, which comprises a thin-film magnetic head and a magnetic recording medium comprising a nonmagnetic support, a nonmagnetic layer comprising mainly inorganic nonmagnetic particles and a binder resin over the nonmagnetic support, and a magnetic layer comprising mainly ferromagnetic metal particles and a binder resin over the nonmagnetic layer, wherein said binder resins in said magnetic and nonmagnetic layers each comprises mainly a vinyl chloride resin, said ferromagnetic metal particles are surface-treated with at least an organic compound, and said magnetic layer has a thickness of from 0.05 to 1.0 .mu.m.
摘要翻译： （1）公开了一种磁记录系统，其包括薄膜磁头和磁记录介质，该磁记录介质包括其上具有主要包含铁磁颗粒和粘合剂树脂的磁性层的非磁性载体，其中所述粘合剂树脂主要包含氯乙烯 树脂，并且所述铁磁颗粒用至少一种有机化合物进行表面处理。 （2）公开了另一种磁记录系统，其包括薄膜磁头和包括非磁性载体的磁记录介质，主要包含无磁性非磁性颗粒的非磁性层和在非磁性载体上的粘合剂树脂，以及包括 主要是非磁性层上的铁磁金属颗粒和粘合剂树脂，其中所述磁性和非磁性层中的所述粘合剂树脂主要包含氯乙烯树脂，所述强磁性金属颗粒用至少一种有机化合物进行表面处理，并且所述磁性层 厚度为0.05〜1.0μm。
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