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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：US4761243A
公开(公告)日：1988-08-02
申请号：US943211
申请日：1986-12-08
摘要： A process for the preparation of a magnetic paint comprising a ferromagnetic powder, an abrasive and a binder, which comprises the steps of preparing the abrasive dispersion comprising the abrasive and the binder, and then mixing said abrasive dispersion and the ferromagnetic powder.
摘要翻译： 一种用于制备包含铁磁性粉末，研磨剂和粘合剂的磁性涂料的方法，其包括以下步骤：制备包含研磨剂和粘合剂的磨料分散体，然后混合所述磨料分散体和铁磁性粉末。
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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：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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公开(公告)号：US4745017A
公开(公告)日：1988-05-17
申请号：US616761
申请日：1984-06-04
IPC分类号： C10M103/02 , C09D101/18 , C09D175/04 , C10M171/00 , C10N40/18 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/265 , 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 is disclosed. The backing layer contains carbon black and a binder and has a thickness of 2 .mu.m or less. The carbon black is composed of fine-grained carbon black having a mean grain size of 10 to 30 m.mu. and coarse-grained carbon black having a mean grain size of 100 to 150 m.mu.. In the backing layer the ratio of the content of carbon black to the binder ranges from 1:0.5 to 1:3.5 by weight.
摘要翻译： 公开了一种磁记录介质，其包括在其表面侧具有磁记录层并且在其相对侧上具有背衬层的非磁性支撑。 背衬层含有炭黑和粘合剂，其厚度为2μm以下。 炭黑由平均粒径为10〜30μm的细粒炭黑和平均粒径为100〜150μm的粗粒炭黑构成。 在背衬层中，炭黑与粘合剂的含量的比例为1:0.5至1:3.5（重量比）。
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公开(公告)号：US4678697A
公开(公告)日：1987-07-07
申请号：US702550
申请日：1985-02-19
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/64 , G11B5/66 , G11B5/73 , G11B5/735 , G11B5/68
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/256 , Y10T428/26
摘要： A magnetic recording medium is described, comprising a non-magnetic support having coated thereon on opposite surfaces a magnetic layer containing a magnetic substance and a binder-containing backing layer, wherein the magnetic layer has a light transmittance of 2% or more for light having a wavelength of 900 nm, the backing layer has a transmittance of from 1 to 10% for light having a wavelength of 900 nm, the magnetic recording medium as a whole has a transmittance of 1% or less for light having a wavelength of 900 nm, and the backing layer has a center line average roughness (Ra) of 0.05 .mu.m or less at a cut-off value of 0.08 mm.
摘要翻译： 描述了一种磁记录介质，其包括在相对表面上涂覆有含有磁性物质和含粘合剂的背衬层的磁性层的非磁性载体，其中，对于具有磁性物质的光具有2％以上的透光率， 对于波长900nm的光，背衬层对于波长为900nm的光具有1〜10％的透射率，对于波长900nm的光，磁记录介质整体的透射率为1％以下 ，背衬层的切断值为0.08mm时的中心线平均粗糙度（Ra）为0.05μm以下。
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公开(公告)号：US4598014A
公开(公告)日：1986-07-01
申请号：US672322
申请日：1984-11-16
申请人： Takahito Miyoshi , Kenichi Masuyama , Toshimitu Okutu , Masahiro Utumi , Masaaki Fujiyama , Minoru Kanazawa
发明人： Takahito Miyoshi , Kenichi Masuyama , Toshimitu Okutu , Masahiro Utumi , Masaaki Fujiyama , Minoru Kanazawa
IPC分类号： C10M103/02 , C09D5/23 , C09D101/18 , C09D175/00 , C09D175/04 , C10N20/06 , C10N40/18 , G11B5/64 , 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 is disclosed. The medium comprises a non-magnetic support having provided on opposite surfaces a magnetic recording layer and a backing layer containing two types of carbon black and a binder and having a thickness of 2 .mu.m or less, one of said carbon black being fine carbon black having an average particle size of 30 to 100 m.mu. and the other of said carbon black being coarse carbon black having an average particle size of 150 to 500 m.mu., and the mixing weight ratio of said carbon black and the binder being 1:1.5 to 1:3.5.
摘要翻译： 公开了一种磁记录介质。 介质包括非磁性支撑体，其在相对表面上设置有磁记录层和含有两种类型的炭黑和粘合剂并具有2μm或更小的厚度的背衬层，所述炭黑中的一种是细的炭黑 平均粒径为30〜100μm，所述炭黑为平均粒径为150〜500μm的粗炭黑，所述炭黑和粘合剂的混合重量比为1:1.5 至1：3.5。
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公开(公告)号：US4647501A
公开(公告)日：1987-03-03
申请号：US815271
申请日：1985-12-24
申请人： Nobutaka Yamaguchi , Shinobu Iida , Norio Nasu , Katsumi Ryoke , Toshimitu Okutu , Kenichi Masuyama
发明人： Nobutaka Yamaguchi , Shinobu Iida , Norio Nasu , Katsumi Ryoke , Toshimitu Okutu , Kenichi Masuyama
IPC分类号： C09D175/04 , C09D101/18 , C09D127/08 , G11B5/73 , G11B5/735 , G11B5/70 , G11B5/72
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/31565 , Y10T428/3158 , Y10T428/31609
摘要： A magnetic recording material, which comprises a non-magnetic support having provided on one side thereof a magnetic layer and on the other side thereof a backing layer is disclosed. The binder of the backing layer is comprised of a combination of a cellulose resin, a vinylidene chloride resin, a polyurethane resin and a polyisocyanate. Use of the backing layer increases the durability of the tape and aids in preventing drop out.
摘要翻译： 公开了一种磁记录材料，其包括在其一侧上设置有磁性层的非磁性支撑体，其另一侧具有背衬层。 背衬层的粘合剂由纤维素树脂，偏二氯乙烯树脂，聚氨酯树脂和多异氰酸酯的组合构成。 背衬层的使用增加了胶带的耐久性，有助于防止脱落。
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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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