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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：US4391851A
公开(公告)日：1983-07-05
申请号：US353791
申请日：1982-03-02
申请人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
发明人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
CPC分类号： G11B5/84 , G11B5/7021
摘要： A process for producing a magnetic recording medium is disclosed. The process involves coating a non-magnetic base with magnetic coating solution containing fine ferromagnetic particles and a binder comprising nitrocellulose, polyol and an isocyanate having at least two isocyanato groups. In the process, the web having 0.3 to 3 wt % of the residual solvent in the magnetic layer is calendered, and the calendered web is then dried thoroughly.
摘要翻译： 公开了一种制造磁记录介质的方法。 该方法包括用含有细铁磁颗粒的磁性涂层溶液和包含硝化纤维素，多元醇和具有至少两个异氰酸酯基的异氰酸酯的粘合剂涂覆非磁性碱。 在该方法中，将磁性层中的残留溶剂的0.3〜3重量％的纤维网压延，然后将压延纤维网彻底干燥。
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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：US4135032A
公开(公告)日：1979-01-16
申请号：US835376
申请日：1977-09-21
申请人： Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
发明人： Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
CPC分类号： G11B5/70 , G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/258 , Y10T428/265
摘要： A magnetic recording medium comprising a non-magnetizable plastic film support having a magnetic recording layer on one side thereof and, on the other side thereof, a layer containing (1) at least one powder of carbon black or graphite, and (2) at least one powder of a white pigment or a light colored pigment, and (3) a binder, powders (1) and (2) forming divided color areas in the back surface layer, and the back surface layer having a surface electrical resistance below 1 .times. 10.sup.10 ohm/cm.sup.2.
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公开(公告)号：US4439486A
公开(公告)日：1984-03-27
申请号：US357448
申请日：1982-03-12
申请人： Yasuyuki Yamada , Masaaki Fujiyama , Nobuo Tsuji
发明人： Yasuyuki Yamada , Masaaki Fujiyama , Nobuo Tsuji
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/26 , Y10T428/265 , Y10T428/31609 , Y10T428/31703
摘要： A magnetic recording medium having a magnetic layer formed on a nonmagnetic base is disclosed. The magnetic layer comprises ferromagnetic particles having a specific surface area of 30 m.sup.2 /g or more. The particles are dispersed in a binder which comprises a thermoplastic polyurethane resin or polyurethane prepolymer and nitrocellulose having an average degree of polymerization of about 50 to 300 and a degree of nitration of 10.7 to 13.0.
摘要翻译： 公开了一种具有形成在非磁性基底上的磁性层的磁记录介质。 磁性层包含比表面积为30m 2 / g以上的铁磁性粒子。 将颗粒分散在包含热塑性聚氨酯树脂或聚氨酯预聚物和平均聚合度为约50至300且硝化度为10.7至13.0的硝酸纤维素的粘合剂中。
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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：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：US4450199A
公开(公告)日：1984-05-22
申请号：US251826
申请日：1981-04-07
申请人： Eiichi Tadokoro , Masaaki Fujiyama , Goro Akashi
发明人： Eiichi Tadokoro , Masaaki Fujiyama , Goro Akashi
CPC分类号： G11B5/70 , Y10S428/90 , Y10T428/249986 , Y10T428/31551 , Y10T428/31565 , Y10T428/31884 , Y10T428/31935
摘要： A magnetic recording medium is disclosed which comprises a nonmagnetic support and a magnetic layer formed thereon, said magnetic layer having a center-line average surface roughness of not more than 2.1.times.10.sup.-2 .mu. and at least one property selected from an average pore size of at least 500 .ANG. and a porosity of at least 30%.
摘要翻译： 公开了一种磁记录介质，其包括非磁性载体和形成在其上的磁性层，所述磁性层的中心线平均表面粗糙度不大于2.1×10-2μm，并且至少一种性质选自平均孔径 至少500 ANGSTROM，孔隙率至少为30％。
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公开(公告)号：US4117190A
公开(公告)日：1978-09-26
申请号：US516315
申请日：1974-10-21
申请人： Goro Akashi , Osamu Suzuki , Masaaki Fujiyama
发明人： Goro Akashi , Osamu Suzuki , Masaaki Fujiyama
CPC分类号： G11B5/72 , G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/252 , Y10T428/256 , Y10T428/257 , Y10T428/259
摘要： By incorporating 5 to 15 parts by weight of a finely divided powder having high hardness and a particle size of less than 10.mu. with 100 parts by weight of graphite powder with 20 to 50 parts by weight of a binder in a graphite layer of a magnetic recording medium which comprises a support, a magnetizable layer and a graphite layer provided on the opposite side of the support from the magnetizable layer, a reduction in the abrasion and the destruction of the graphite layer during running can be reduced.
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公开(公告)号：US4002804A
公开(公告)日：1977-01-11
申请号：US600689
申请日：1975-07-31
CPC分类号： G11B5/714 , G11B5/706 , G11B5/70694 , Y10S428/90 , Y10T428/24975
摘要： A magnetic recording material which comprises a support having thereon a magnetic recording layer comprising a ferromagnetic substance and a binder, wherein the ferromagnetic substance comprises a mixture of (1) a Berthollide iron oxide having a particle size of about 0.5 .mu. or larger and a degree of oxidation represented by the value of x in FeO.sub.x of 1.33
摘要翻译： 一种磁记录材料，包括其上具有包含铁磁性物质和粘合剂的磁记录层的载体，其中所述铁磁性物质包含（1）粒径为约0.5μm或更大的Berthollide氧化铁和 的FeOx中的x值为1.33
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