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公开(公告)号：US4547393A
公开(公告)日：1985-10-15
申请号：US618803
申请日：1984-06-08
申请人： Takamitsu Asai , Tatsuji Kitamoto , Goro Akashi
发明人： Takamitsu Asai , Tatsuji Kitamoto , Goro Akashi
CPC分类号： G11B5/845 , G11B5/70626 , G11B5/7085
摘要： The present invention relates to an improved method for preparing a magnetic recording method having excellent magnetic orientation comprising the steps of (1) dispersing ferromagnetic fine particles which are plate-shaped and which have an axis of magnetization perpendicular to the plates of the particles in a binder and (2) coating a magnetic coating layer on a non-magnetic support wherein the method comprises, after coating the magnetic coating layer and before drying it, subjecting the surface of the magnetic layer to a magnetic field from the direction perpendicular to the support to produce a magnetic orientation while contacting the surface of the magnetic layer with a flexible smoothening sheet.
摘要翻译： 本发明涉及一种制备具有优异磁性取向性的磁记录方法的改进方法，包括以下步骤：（1）将板状的铁磁细颗粒分散在其中，并将磁性轴垂直于颗粒的平板 粘合剂和（2）在非磁性载体上涂覆磁性涂层，其中所述方法包括在涂覆磁性涂层之后并在其干燥之前，使磁性层的表面从垂直于载体的方向受到磁场 以在磁性层的表面与柔性平滑片接触的同时产生磁性取向。
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公开(公告)号：US4515857A
公开(公告)日：1985-05-07
申请号：US375690
申请日：1982-05-06
申请人： Tatsuji Kitamoto , Goro Akashi
发明人： Tatsuji Kitamoto , Goro Akashi
CPC分类号： G11B5/852 , G11B5/70642 , G11B5/714 , G11B5/845 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a non-magnetic binder, the ferromagnetic particles are cubic particles of 0.3 or less micron and are subjected to an orientation treatment in the vertical direction to the recording surface, whereby the output and S/N ratio in a high density recording are increased.
摘要翻译： 在包含非磁性载体和涂覆有磁性颗粒的磁记录层的磁记录介质中，铁磁颗粒分散在非磁性粘结剂中，铁磁性颗粒是0.3微米或更小微米的立方颗粒，并进行取向处理 到记录表面的垂直方向，从而增加了高密度记录中的输出和S / N比。
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公开(公告)号：US4482578A
公开(公告)日：1984-11-13
申请号：US505509
申请日：1983-06-17
申请人： Goro Akashi , Tatsuji Kitamoto , Tsutomu Okita
发明人： Goro Akashi , Tatsuji Kitamoto , Tsutomu Okita
IPC分类号： G11B5/702 , C09D5/23 , C09D101/00 , C09D101/08 , C09D133/04 , C09D175/00 , G11B5/70 , G11B5/714 , G11B5/842 , G11B5/845 , B05D3/06
摘要： A method for preparing a magnetic recording medium comprising a non-magnetic support having coated thereon a magnetic layer containing plate-shaped ferromagnetic fine particles oriented perpendicular to a plane of the surface of the support, the process comprising the steps of:coating the non-magnetic support with a coating composition wherein ferromagnetic fine particles are dispersed in a solution comprised of a compound polymerizable by radiation with electron beams and a solvent, said particles being plate-shaped and having an axis of easy magnetization perpendicular to a plane of the plate-shaped particles;orienting the ferromagnetic fine particles perpendicular to the surface of support while the coating composition is undried;radiating the composition with electron beams; anddrying the composition by removing the solvent.
摘要翻译： 一种制备磁性记录介质的方法，包括其上涂覆有包含垂直于所述载体表面的平面定向的板状铁磁细颗粒的磁性层的非磁性载体，所述方法包括以下步骤： 具有涂层组合物的磁性载体，其中铁磁细颗粒分散在由通过辐射与电子束和溶剂聚合的化合物组成的溶液中，所述颗粒是板形的并且具有垂直于板状平面的平滑的磁化轴线， 形状颗粒; 在涂料组合物未干燥的同时使铁磁细颗粒垂直于载体表面定向; 用电子束辐射组合物; 并通过除去溶剂干燥组合物。
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公开(公告)号：US4477489A
公开(公告)日：1984-10-16
申请号：US413890
申请日：1982-09-01
申请人： Akio Yanai , Ryuji Shirahata , Tatsuji Kitamoto
发明人： Akio Yanai , Ryuji Shirahata , Tatsuji Kitamoto
CPC分类号： G11B5/851
摘要： In a method of making a magnetic recording medium by causing a flow of vapor obtained by evaporating a magnetic metal deposition material to impinge and deposit on a moving substrate at an oblique angle with respect to the moving substrate, the substrate is moved so that the incident angle of the vapor flow with respect to the substrate continuously changes from the maximum incident angle to the minimum incident angle, and an oxidizing gas is introduced in the vicinity of the substrate and near the maximum incident angle portion or the minimum incident angle portion of the vapor flow during the formation of a thin ferromagnetic film on the substrate. The maximum incident angle is preferably between 60.degree. and 90.degree., and the minimum incident angle between 30.degree. and 75.degree..
摘要翻译： 在通过使磁性金属沉积材料蒸发而获得的蒸气流动相对于移动的衬底以倾斜角撞击并沉积在移动的衬底上来制造磁记录介质的方法中，衬底被移动，使得事件 蒸气流相对于基板的角度从最大入射角连续地变化到最小入射角，并且氧化气体被引入到基板附近并且在最大入射角部分或最小入射角部分附近 在衬底上形成薄铁磁膜期间的蒸汽流。 最大入射角优选在60°和90°之间，最小入射角在30°和75°之间。
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公开(公告)号：US4442159A
公开(公告)日：1984-04-10
申请号：US382336
申请日：1982-05-26
CPC分类号： G11B5/716 , Y10S428/90 , Y10T428/24942 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium which comprises a non-magnetic support having thereon two or more magnetic layers comprising magnetic particles in a binder. The magnetic layer(s) other than the topmost layer comprises needle-shaped magnetic particles. The topmost layer comprises plate-shaped magnetic particles which have axes of easy magnetization perpendicular to the individual plate planes and the plate planes are oriented substantially parallel to the surface of the magnetic layer.
摘要翻译： 一种磁记录介质，其包括其上具有两个或更多个包含粘合剂中的磁性颗粒的磁性层的非磁性载体。 除了最上层之外的磁性层包括针状磁性颗粒。 最顶层包括板状磁性颗粒，其具有垂直于各个板平面的易磁化的轴，并且板平面基本上平行于磁性层的表面取向。
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公开(公告)号：US4414270A
公开(公告)日：1983-11-08
申请号：US345121
申请日：1982-02-02
IPC分类号： G11B5/70 , C09D5/23 , C09D7/12 , C10M171/00 , C10N40/18 , G11B5/708 , G11B5/73 , G11B5/735 , B32B5/16
CPC分类号： G11B5/7085 , G11B5/735 , Y10S428/90 , Y10T428/252 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/265
摘要： A magnetic recording medium comprising a magnetic layer on one surface of a non-magnetic base and a back coating on the other surface thereof which is not thicker than 2.mu. and which contains inorganic particles and a binder is disclosed. The inorganic particles have an average size between 0.02 and 5.mu. and a Mohs hardness of 2.5 to 9.0, and the surface of the back coating has a center line average roughness (Ra) of 0.024 or less and the surface of the magnetic layer has a center line average roughness (Ra) of 0.02.
摘要翻译： 公开了一种磁记录介质，其包括在非磁性基底的一个表面上的磁性层和在另一个表面上的不超过2微米并且含有无机颗粒和粘合剂的背涂层。 无机粒子的平均粒径为0.02〜5μm，莫氏硬度为2.5〜9.0，背面的表面的中心线平均粗糙度（Ra）为0.024以下，磁性层的表面为 中心线平均粗糙度（Ra）为0.02。
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公开(公告)号：US4412507A
公开(公告)日：1983-11-01
申请号：US284863
申请日：1981-07-20
申请人： Tatsuji Kitamoto , Ryuji Shirahata
发明人： Tatsuji Kitamoto , Ryuji Shirahata
CPC分类号： G11B5/851 , C23C14/562 , H01F41/20
摘要： A magnetic recording medium manufacturing device in which a flexible belt-shaped support is conveyed above a molten metal vaporizing source substantially at a constant speed while a magnetic film is formed on a surface of the support by vacuum deposition. The support is guided by transporting means such that the support is curved above the molten metal vaporizing source along a path wherein metal vapor flow lines connecting the center of the molten metal vaporizing source to points on the surface of the support form a constant angle of incidence with the longitudinal direction of the support. An adjusting mechanism is provided to change the angle of incidence by moving the transporting means along lines parallel to the metal vapor flow lines.
摘要翻译： 一种磁记录介质制造装置，其中在通过真空沉积在支撑体的表面上形成磁性膜时，基本上以恒定速度将柔性带状载体输送到熔融金属蒸发源上方。 支撑件由输送装置引导，使得支撑件沿着熔融金属蒸发源上方弯曲，其中连接熔融金属蒸发源的中心的金属蒸气流线与支撑件表面上的点形成恒定的入射角 与支撑件的纵向方向。 提供调节机构以通过沿与金属蒸气流线平行的线移动输送装置来改变入射角。
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公开(公告)号：US4410565A
公开(公告)日：1983-10-18
申请号：US352224
申请日：1982-02-25
申请人： Tatsuji Kitamoto , Ryuji Shirahata , Yasuo Tamai
发明人： Tatsuji Kitamoto , Ryuji Shirahata , Yasuo Tamai
IPC分类号： G11B5/66 , C09D167/00 , G11B5/64 , G11B5/65 , G11B5/738 , G11B5/84 , G11B5/851 , H01F41/20 , H01F10/02
摘要： A magnetic recording medium comprising a substrate, a thermoplastic prime coat provided thereon, and a ferromagnetic metal layer having columnar grains which at least partially penetrate into the prime coat from the top thereof and are integrated therewith. The medium is prepared by applying a prime coat onto a substrate, forming a magnetic metal layer having columnar grains by vapor deposition, and then heating and pressing the obtained combination.
摘要翻译： 一种磁记录介质，包括基底，其上提供的热塑性底涂层，以及具有至少部分地从其顶部渗透到底涂层中并与其一体化的柱状颗粒的强磁性金属层。 通过将基底涂布在基板上，通过气相沉积形成具有柱状晶粒的磁性金属层，然后加热并压制所得到的组合来制备介质。
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公开(公告)号：US4354908A
公开(公告)日：1982-10-19
申请号：US923752
申请日：1978-07-11
申请人： Ryuji Shirahata , Tatsuji Kitamoto , Yasuo Tamai , Masaaki Suzuki
发明人： Ryuji Shirahata , Tatsuji Kitamoto , Yasuo Tamai , Masaaki Suzuki
CPC分类号： H01F41/14
摘要： A process for the production of a magnetic recording member which comprises effecting electric field vapor deposition under conditions such that the angle of incidence at which the vapor beam of a ferromagnetic metal strikes a support is at least about 50.degree. and the electric field between the support and a vaporization source is at least about 5 kv/m.
摘要翻译： 一种用于制造磁记录部件的方法，包括在使铁磁金属的蒸气束撞击载体的入射角至少为约50°的条件下进行电场气相沉积，并且支撑体 并且蒸发源为至少约5kv / m。
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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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