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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。
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公开(公告)号：US4696859A
公开(公告)日：1987-09-29
申请号：US834680
申请日：1986-02-28
申请人： Takahito Miyoshi , Nobuo Aoki , Takashi Yoneyama , Akira Kasuga , Toshimitu Okutu , Masaaki Fujiyama , Yasutoshi Okuzawa
发明人： Takahito Miyoshi , Nobuo Aoki , Takashi Yoneyama , Akira Kasuga , Toshimitu Okutu , Masaaki Fujiyama , Yasutoshi Okuzawa
CPC分类号： G11B5/714 , G11B5/71 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording medium comprising a non-magnetic support having coated thereon a magnetic layer, the magnetic layer containing (i) ferromagnetic alloy particles having an average length in the long axis of 0.25 .mu.m or less and (ii) fatty acid components comprising behenic acid in an amount of 20 to 75 wt%, stearic acid in an amount of 10 to 45 wt% and oleic acid in an amount of 10 to 45 wt% based on the total weight of the three fatty acids.
摘要翻译： 一种磁性记录介质，其特征在于，具有涂覆有磁性层的非磁性载体，所述磁性层含有（i）长轴的平均长度为0.25μm以下的铁磁性合金粒子，（ii）包含山嵛酸的脂肪酸成分 20至75重量％的酸，10至45重量％的硬脂酸和基于三个脂肪酸总重量的10至45重量％的油酸。
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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：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。
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公开(公告)号：US4582757A
公开(公告)日：1986-04-15
申请号：US638935
申请日：1984-08-09
IPC分类号： C10M103/02 , C09D101/18 , C09D175/04 , C10M171/00 , C10N40/18 , G11B5/73 , G11B5/735 , G11B5/72
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/258 , Y10T428/30
摘要： A magnetic recording medium which comprises a non-magnetic support having on the surface side thereof a magnetic recording layer and on the opposite side thereof a backing layer having a thickness of 2 .mu.m or less, which contains carbon black and a binder and optionally, an inorganic powder, in which the backing layer contains at least two kinds of carbon black, one being fine-grained carbon black having a mean grain size of 10 to 30 m.mu. and the other being coarse-grained carbon black having a mean grain size of 150 to 500 m.mu. such that the weight ratio (P/B) of the total amount of carbon black and inorganic powder (P) to binder (B) is from about 1/0.5 to 1/3.5. The recording medium described provided smooth and stable tape-running for an extended period and a high S/N ratio.
摘要翻译： 一种磁记录介质，其特征在于，具有非磁性载体，所述非磁性载体的表面侧具有磁记录层，并且在其相对侧上具有厚度为2μm或更小的背衬层，所述背衬层含有炭黑和粘合剂， 无机粉末，其中背衬层含有至少两种炭黑，一种是平均粒径为10至30μm的细粒炭黑，另一种是具有平均粒径的粗粒炭黑 为150〜500μm，炭黑和无机粉末（P）的总量与粘合剂（B）的重量比（P / B）为约1 / 0.5〜1 / 3.5。 所描述的记录介质延长了一段时间并且具有高S / N比的平稳和稳定的磁带运行。
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公开(公告)号：US4487802A
公开(公告)日：1984-12-11
申请号：US459089
申请日：1983-01-19
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/265 , Y10T428/31797 , Y10T428/31931 , Y10T428/31938
摘要： A magnetic recording medium is disclosed. The medium is comprised of a non-magnetic flexible support having a subbing layer coated thereon with a magnetic layer coated on the subbing layer. The subbing layer is comprised of a copolymer of a diolefin and a vinyl monomer. The subbing layer provides excellent adhesiveness between the support and the magnetic layer and can be produced without the use of organic solvents. Accordingly, the subbing layer can be economically produced without environmental pollution.
摘要翻译： 公开了一种磁记录介质。 所述介质由非磁性柔性支撑体组成，其上涂覆有涂层在所述底层上的磁性层的底层。 底层由二烯烃和乙烯基单体的共聚物组成。 底层在支撑体和磁性层之间提供优异的粘合性，并且可以在不使用有机溶剂的情况下制造。 因此，可以经济地制造底层而没有环境污染。
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公开(公告)号：US4650720A
公开(公告)日：1987-03-17
申请号：US599116
申请日：1984-04-11
申请人： Nobutaka Yamaguchi , Takahito Miyoshi , Toshimitu Okutu , Noburo Hibino , Eiichi Tadokoro , Masaaki Fujiyama
发明人： Nobutaka Yamaguchi , Takahito Miyoshi , Toshimitu Okutu , Noburo Hibino , Eiichi Tadokoro , Masaaki Fujiyama
IPC分类号： G11B5/78 , C09D5/23 , C09D7/12 , C10M105/22 , C10N40/18 , G11B5/706 , G11B5/71 , G11B5/73 , G11B5/735 , G11B5/62
CPC分类号： G11B5/735 , G11B5/71 , Y10S428/90 , Y10T428/31786
摘要： A magnetic recording medium is disclosed which comprises a non-magnetic support having provided thereon a magnetic recording layer and a backing layer on the opposite surface thereof, wherein said magnetic recording layer contains a fatty acid, said backing layer contains a cellulose resin, and said non-magnetic support has a Young's modulus of 7.times.10.sup.10 to 1.times.10.sup.13 dyn/cm.sup.2.
摘要翻译： 公开了一种磁记录介质，其包括在其相对表面上设置有磁记录层和背衬层的非磁性载体，其中所述磁记录层含有脂肪酸，所述背层含有纤维素树脂，并且所述 非磁性载体的杨氏模量为7×10 10〜1×10 13 dyn / cm 2。
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公开(公告)号：US4612235A
公开(公告)日：1986-09-16
申请号：US715757
申请日：1985-03-25
IPC分类号： C09D101/18 , C09D175/04 , G11B5/72 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , G11B5/72 , Y10S428/90 , Y10T428/24975 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259
摘要： This invention relates to a magnetic recording medium whose coefficient of friction is lowered without lowering S/N and which has an improved running property, which comprises a magnetic recording layer on one side of a nonmagnetic support and a back layer containing an inorganic powder and a binder and having a thickness of at most 2.mu., on the other side thereof, characterized in that the surface of the back layer is provided with surface projections with a height of 0.05 to 0.8.mu., an interval of at least 50.mu. and 50 to 50,000 projections/cm.sup.2.
摘要翻译： 本发明涉及一种磁记录介质，其摩擦系数降低而不降低S / N，并且具有改善的运行性能，其包括在非磁性载体的一侧上的磁记录层和含有无机粉末和 粘合剂，其厚度至多为2μm，其特征在于，背层的表面设置有高度为0.05至0.8μm的表面突起，间隔至少为50μm至50至 50,000个投影/ cm2。
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公开(公告)号：US4569856A
公开(公告)日：1986-02-11
申请号：US709859
申请日：1985-03-08
申请人： Takahito Miyoshi , Kenichi Masuyama , Shin-ichiro Dezawa , Toshimitu Okutu , Norio Nasu , Nobuo Aoki , Masaaki Fujiyama
发明人： Takahito Miyoshi , Kenichi Masuyama , Shin-ichiro Dezawa , Toshimitu Okutu , Norio Nasu , Nobuo Aoki , Masaaki Fujiyama
CPC分类号： G11B5/70 , G11B5/706 , G11B5/714 , Y10S428/90
摘要： A method for preparing a magnetic recording medium is described, comprising (1) pre-dispersing ferromagnetic particles having an S.sub.BET specific surface area of 35 m.sup.2 /g or more and having an adjusted water content of 0.8 wt % or more with a binder, (2) adding an additional binder and a lubricating agent thereinto, mixing and dispersing them to prepare a diserpsion of a magnetic coating composition, and (3) coating the resulting dispersion of a magnetic coating composition on a non-magnetic support.
摘要翻译： 描述了制备磁记录介质的方法，其包括：（1）用粘合剂将SBET比表面积为35m 2 / g以上并具有0.8重量％以上调节水含量的铁磁粒子预分散， 2）向其中加入附加的粘合剂和润滑剂，混合并分散它们以制备磁性涂料组合物的分解，和（3）将得到的磁性涂料组合物的分散体涂布在非磁性载体上。
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公开(公告)号：US4567057A
公开(公告)日：1986-01-28
申请号：US654549
申请日：1984-09-26
申请人： Kenichi Masuyama , Toshimitu Okutu , Takahito Miyoshi , Hiroshi Ogawa , Masahiro Utumi , Masaaki Fujiyama , Sugihiko Tada
发明人： Kenichi Masuyama , Toshimitu Okutu , Takahito Miyoshi , Hiroshi Ogawa , Masahiro Utumi , Masaaki Fujiyama , Sugihiko Tada
CPC分类号： G11B5/845
摘要： A magnetic coating composition comprising a binder dissolved in a solvent and magnetic grains dispersed therein is applied onto a surface of a non-magnetic substrate continuously moved. The coating film thus overlaid on the non-magnetic substrate is subjected to a preliminary orientation step for orientating the magnetic grains in the coating film, and then to a preliminary drying step. A final orientation step is then conducted while intermediate drying is carried out. Thereafter, final drying is effected.
摘要翻译： 将包含溶解在溶剂中的粘合剂和分散在其中的磁性颗粒的磁性涂料组合物施加到连续移动的非磁性基材的表面上。 由此覆盖在非磁性基板上的涂膜进行用于使涂覆膜中的磁性颗粒定向的初步取向步骤，然后进行预干燥步骤。 然后在进行中间干燥的同时进行最终取向步骤。 此后，进行最终干燥。
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