-
公开(公告)号:US5447682A
公开(公告)日:1995-09-05
申请号:US82233
申请日:1993-06-24
申请人: Yusuki Saito
发明人: Yusuki Saito
CPC分类号: G11B5/842
摘要: According to the method of making a magnetic coating material, 100 parts by weight of a magnetic metal powder, 1 to 10 parts by weight of fatty acid, 1 to 5 parts by weight of a dispersing agent, and a solvent are combined in the absence of a binding agent, wherein the solvent is present in sufficient amount to yield an admixture having a solids concentration of the magnetic metal powder in the range from 65 to 70 percent. The admixture is kneaded using a pressure kneader. The kneaded admixture is then blended with a binding agent to provide the magnetic coating material.
摘要翻译: 根据制备磁性涂层材料的方法,在不存在的情况下将100重量份的磁性金属粉末,1至10重量份的脂肪酸,1至5重量份的分散剂和溶剂合并 的粘合剂,其中溶剂以足够的量存在以产生具有65至70%的磁性金属粉末的固体浓度的混合物。 使用压力捏合机捏合该混合物。 然后将捏合的混合物与粘合剂混合以提供磁性涂层材料。
-
公开(公告)号:US4693930A
公开(公告)日:1987-09-15
申请号:US730272
申请日:1985-05-03
IPC分类号: G11B5/702 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/708 , G11B5/71 , G11B5/68 , G11B5/706
CPC分类号: G11B5/71 , Y10S428/90 , Y10T428/25
摘要: Flexible magnetic recording media such as videotapes based on ferromagnetic oxide particles can provide high carrier-to-noise ratios previously available only with metal powder tapes when the recording layer has a high loading (at least 74% by weight) of oxide particles which have a high surface area (at least 40 m.sup.2 /g) and includes free monobasic fatty acid comprising more than 1.5% by weight of the ferromagnetic oxide particles. The free fatty acid provides a coefficient of friction not exceeding 0.3. A preferred monobasic fatty acid is myristic acid. By incorporating into the binder a lubricant-adsorption inhibitor such as citric acid, a greater proportion of the fatty acid remains free.
摘要翻译: 基于铁磁氧化物颗粒的诸如录像带的柔性磁记录介质可以提供仅当金属粉末带才具有高的载波 - 噪声比,当记录层具有高负载(至少74重量%)的氧化物颗粒时,其具有 高表面积(至少40m 2 / g),并且包括大于1.5重量%的铁磁性氧化物颗粒的游离一元脂肪酸。 游离脂肪酸提供的摩擦系数不超过0.3。 优选的一元脂肪酸是肉豆蔻酸。 通过在粘合剂中加入润滑剂吸附抑制剂如柠檬酸,较大比例的脂肪酸保持游离。
-
公开(公告)号:US4684572A
公开(公告)日:1987-08-04
申请号:US726034
申请日:1985-04-23
申请人: Yoshitaka Yasufuku , Masaji Nara , Shigeru Akutsu
发明人: Yoshitaka Yasufuku , Masaji Nara , Shigeru Akutsu
CPC分类号: G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/254 , Y10T428/265
摘要: A magnetic recording medium having a magnetic layer and a backing layer on opposite sides of a support is disclosed. The backing layer comprises a binder resin, a conductive carbon black and an organic powder.
摘要翻译: 公开了一种在支撑体的相对侧上具有磁性层和背衬层的磁记录介质。 背衬层包括粘合剂树脂,导电炭黑和有机粉末。
-
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。
-
公开(公告)号:US4649072A
公开(公告)日:1987-03-10
申请号:US779348
申请日:1985-09-23
申请人: Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人: Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
CPC分类号: G11B5/735 , Y10S428/90 , Y10T428/24942 , Y10T428/25 , Y10T428/30 , Y10T428/31551
摘要: A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer on one side and a backing layer on the other side, wherein the backing layer contains (1) non-magnetic powders containing carbon black having an average particle diameter of from 0.1 to 1 .mu.m; (2) two or more binders wherein (a) at least one of the binders is a resin having a 100% modulus of from 15 to 150 kg/cm.sup.2 in an amount of from 50 to 95 wt % based on the total amount of the binders in the backing layer, and (b) the rest binder(s) is/are a resin other than the resin having a 100% modulus of from 15 to 150 kg/cm.sup.2, and the weight ratio of all the non-magnetic powders to all the binders in the backing layer is from 300:100 to 40:100; and (3) a polyisocyanate in an amount of from 15 to 40 wt % based on the total amount of the binders in the backing layer.
摘要翻译: 一种磁记录介质,包括在一侧上设置有磁性层的磁性载体和另一侧上的背衬层,其中所述背衬层包含(1)含有平均粒径为 0.1〜1μm; (2)两种或更多种粘合剂,其中(a)至少一种粘合剂是基于总量的50至95重量%的100至100重量%的模量为15至150kg / cm 2的树脂 背衬层中的粘合剂,和(b)剩余的粘合剂是具有100%模量为15至150kg / cm 2的树脂之外的树脂,并且所有非磁性粉末的重量比 对于背衬层中的所有粘合剂为300:100至40:100; 和(3)基于背衬层中的粘合剂的总量的15至40重量%的量的多异氰酸酯。
-
公开(公告)号:US4572866A
公开(公告)日:1986-02-25
申请号:US545662
申请日:1983-10-26
申请人: Issei Nakamura , Kenji Itozawa
发明人: Issei Nakamura , Kenji Itozawa
CPC分类号: G11B5/70647 , G11B5/714 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/2991 , Y10T428/31609 , Y10T428/3163 , Y10T428/31721 , Y10T428/31935
摘要: A magnetic recording medium comprising a support and a magnetic layer on said support. Said magnetic layer is a unitary magnetic layer comprising ferromagnetic metallic powder. The average grain size of said ferromagnetic powder is not more than 0.5.mu., the ratio of the major axis to the minor axis (acicular ratio) of said powders is from 1.3 to 4.5 and the coercive force of said powders is from 550 to 800 Oe.
摘要翻译: 一种磁记录介质,包括在所述载体上的载体和磁性层。 所述磁性层是包含强磁性金属粉末的整体磁性层。 所述铁磁性粉末的平均粒径不大于0.5μm,所述粉末的长轴与短轴的比例(针状比)为1.3〜4.5,所述粉末的矫顽力为550〜800Oe 。
-
27.
公开(公告)号:US4552808A
公开(公告)日:1985-11-12
申请号:US554658
申请日:1983-11-23
IPC分类号: G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , G11B5/706 , G11B5/714 , G11B5/73 , G11B5/68
CPC分类号: G11B5/70678 , G11B5/714 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/31
摘要: A magnetic recording material is disclosed which is comprised of a single magnetic layer comprised of plate-shaped ferromagnetic particles wherein the plate-shaped ferromagnetic particles are present in greater number in the surface part of the magnetic layer than in the inner part and/or the plate-shaped ferromagnetic particles are aligned such that an average horizontal axis component of the particles with respect to the surface of magnetic layer is larger in the surface part than in the inner part. The location and alignment of the particles make is possible to increase output with short-wave recording.
摘要翻译: 公开了一种磁记录材料,其由包括板状铁磁性颗粒的单个磁性层组成,其中板状铁磁性颗粒在磁性层的表面部分中比在内部部分和/或 排列板状铁磁性粒子,使得颗粒相对于磁性层表面的平均水平轴分量在表面部分比在内部部分大。 颗粒的位置和排列可以通过短波记录来增加输出。
-
公开(公告)号:US4507457A
公开(公告)日:1985-03-26
申请号:US525621
申请日:1983-08-23
申请人: Albert Kohl , Norbert Schneider , Gregor Ley , Werner Balz , Milena Melzer , Helmut Jakusch
发明人: Albert Kohl , Norbert Schneider , Gregor Ley , Werner Balz , Milena Melzer , Helmut Jakusch
IPC分类号: G11B5/702 , C09D5/23 , C09D175/00 , C09D175/04 , G11B5/70 , G11B5/842 , G11B5/68
CPC分类号: G11B5/7013
摘要: Magnetic recording media are produced by dispersing timely divided anisotropic magnetic material in a polymeric binder to a non-magnetizable base.
摘要翻译: 通过将聚合物粘合剂中的及时分散的各向异性磁性材料分散到不可磁化的基底来制造磁记录介质。
-
公开(公告)号:US4459253A
公开(公告)日:1984-07-10
申请号:US413210
申请日:1982-08-30
申请人: Haik Marcar , Hans Traeg
发明人: Haik Marcar , Hans Traeg
IPC分类号: G11B5/82 , C09D5/23 , C09D181/00 , C09D181/06 , G11B5/68 , G11B5/842 , G11B5/848 , B02C18/00
CPC分类号: G11B5/848 , Y10S428/90 , Y10S525/906
摘要: A new magnetic medium permits magnetic recording either in the longitudinal or the vertical direction. The medium, unlike prior art structures, does not require a nonmagnetic substrate. The medium is a rigid magnetic disk homogeneously prepared from ferric oxide particles and polyethersulfone in ratios and proportions that produce effective and inexpensive magnetic recording media.
摘要翻译: 新的磁介质允许在纵向或垂直方向进行磁记录。 与现有技术结构不同,该介质不需要非磁性基底。 介质是由氧化铁颗粒和聚醚砜均匀地制备的刚性磁盘,其比例和比例产生有效和便宜的磁记录介质。
-
公开(公告)号:US4370384A
公开(公告)日:1983-01-25
申请号:US306665
申请日:1981-09-29
申请人: Akihiko Hosaka , Yukihiro Isobe , Kiyotaka Okuyama
发明人: Akihiko Hosaka , Yukihiro Isobe , Kiyotaka Okuyama
CPC分类号: G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31794
摘要: A magnetic recording medium having a substrate coated with a magnetic layer comprising a magnetic powder and a binder essentially consisting of 20 to 70 wt. % of a polyester resin, 80 to 30 wt. % of a vinyl chloride-vinylidene chloride copolymer and a polyisocyanate.
摘要翻译: 一种磁记录介质,其具有涂覆有磁性层的基材,该磁性层包含磁性粉末和基本上由20至70重量% %的聚酯树脂,80〜30重量% %的氯乙烯 - 偏二氯乙烯共聚物和多异氰酸酯。
-
-
-
-
-
-
-
-
-