公开(公告)号：US4388360A

公开(公告)日：1983-06-14

申请号：US356540

申请日：1982-03-09

申请人： Takahito Miyoshi ,  Toshimitu Okutu ,  Masaaki Takimoto ,  Takashi Saida ,  Goro Akashi ,  Masaaki Fujiyama

发明人： Takahito Miyoshi ,  Toshimitu Okutu ,  Masaaki Takimoto ,  Takashi Saida ,  Goro Akashi ,  Masaaki Fujiyama

IPC分类号： C09D101/18 ,  C08J5/16 ,  C09D127/06 ,  C09D175/04 ,  G11B5/73 ,  G11B5/735 ,  H01F10/02

CPC分类号： G11B5/735 ,  Y10S428/90 ,  Y10T428/24612 ,  Y10T428/256 ,  Y10T428/265

摘要： A magnetic recording medium is disclosed which is comprised of a nonmagnetic support base having a magnetic layer disposed on one surface. A back coating is disposed on the opposite surface of the support base in order to provide the magnetic recording medium with greater durability without increasing the coefficient of friction. The back coating is comprised of a binder having inorganic particles dispersed therein, the inorganic particles including SnO.sub.2 particles having an average size of about 0.01 to about 0.8.mu.. The back coating does not reduce the S/N ratio of the recording medium.

摘要翻译： 公开了一种磁记录介质，其包括具有设置在一个表面上的磁性层的非磁性支撑基座。 背部涂层设置在支撑基座的相对表面上，以便在不增加摩擦系数的情况下提供更大耐用性的磁记录介质。 背涂层由分散有无机颗粒的粘合剂组成，无机颗粒包括平均尺寸为约0.01至约0.8μm的SnO 2颗粒。 背涂层不会降低记录介质的S / N比。

公开(公告)号：US4414270A

公开(公告)日：1983-11-08

申请号：US345121

申请日：1982-02-02

申请人： Takahito Miyoshi ,  Toshimitu Okutu ,  Goro Akashi ,  Tatsuji Kitamoto ,  Masaaki Fujiyama

发明人： Takahito Miyoshi ,  Toshimitu Okutu ,  Goro Akashi ,  Tatsuji Kitamoto ,  Masaaki Fujiyama

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。

公开(公告)号：US4442171A

公开(公告)日：1984-04-10

申请号：US356285

申请日：1982-03-09

申请人： Masami Sato ,  Goro Akashi ,  Yasutoshi Okuzawa ,  Toshimitu Okutu

发明人： Masami Sato ,  Goro Akashi ,  Yasutoshi Okuzawa ,  Toshimitu Okutu

IPC分类号： G11B5/72 ,  C08J5/16 ,  C09D101/18 ,  C09D175/04 ,  G11B5/73 ,  G11B5/735 ,  G11B5/70

CPC分类号： G11B5/735 ,  Y10S428/90 ,  Y10T428/24521 ,  Y10T428/26 ,  Y10T428/265

摘要： A magnetic recording medium comprising a nonmagnetic flexible substrate, a magnetic layer provided on the surface of the substrate and containing ferromagnetic grains dispersed in a binder, and a back layer provided on the back surface of the substrate. The magnetic recording medium has a stiffness (S.sub.TD) of 6.0 or less. The friction coefficient (.mu..sub.B) of the back layer surface with respect to the axial direction of a loading post in a video tape recorder is controlled to satisfy the condition:0.ltoreq..mu..sub.B .ltoreq.0.1S.sub.TD -0.05so as to make the magnetic recording medium highly resistant to damage due to movement in a video tape recorder.

摘要翻译： 一种磁记录介质，包括非磁性柔性基板，设置在基板表面上并包含分散在粘结剂中的铁磁性颗粒的磁性层，以及设置在基板的背面上的背层。 磁记录介质具有6.0或更小的刚度（STD）。 背景层表面相对于录像机中的装载柱的轴向的摩擦系数（μB）被控制为满足以下条件：0≤b≤0.1STD-0.05，以便 使得磁记录介质高度抵抗由于磁带录像机中的移动而造成的损坏。

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

IPC分类号： G11B5/70 ,  B32B3/10

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％。

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

IPC分类号： G11B5/842 ,  G11B5/702 ,  G11B5/84 ,  H01F10/02

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。

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

IPC分类号： G11B5/70 ,  G11B5/735 ,  G11B5/78

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.

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

IPC分类号： G11B5/708 ,  G11B5/72 ,  H01F10/06

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.

公开(公告)号：US4002804A

公开(公告)日：1977-01-11

申请号：US600689

申请日：1975-07-31

申请人： Goro Akashi ,  Masaaki Fujiyama ,  Nobutaka Yamaguchi ,  Satoru Takayama ,  Koji Sasazawa

发明人： Goro Akashi ,  Masaaki Fujiyama ,  Nobutaka Yamaguchi ,  Satoru Takayama ,  Koji Sasazawa

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/714 ,  B23B15/00

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

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

IPC分类号： G11B5/41 ,  G11B23/50 ,  B32B5/16 ,  G11B5/78

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。

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

IPC分类号： G11B5/70 ,  C09D5/23 ,  G11B5/702 ,  G11B5/842 ,  B05D3/06

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。