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公开(公告)号：US5904979A
公开(公告)日：1999-05-18
申请号：US602567
申请日：1996-02-14
申请人： Yutaka Kakuishi , Kenichi Masuyama , Kiyomi Ejiri
发明人： Yutaka Kakuishi , Kenichi Masuyama , Kiyomi Ejiri
CPC分类号： G11B5/738 , G11B5/712 , Y10S428/90 , Y10S977/932 , Y10T428/265 , Y10T428/2991 , Y10T428/31935
摘要： (1) A magnetic recording system is disclosed, which comprises a thin-film magnetic head and a magnetic recording medium comprising a nonmagnetic support having thereon a magnetic layer comprising mainly ferromagnetic particles and a binder resin, wherein said binder resin comprising mainly a vinyl chloride resin, and said ferromagnetic particles are surface-treated with at least an organic compound. (2) Another magnetic recording system is disclosed, which comprises a thin-film magnetic head and a magnetic recording medium comprising a nonmagnetic support, a nonmagnetic layer comprising mainly inorganic nonmagnetic particles and a binder resin over the nonmagnetic support, and a magnetic layer comprising mainly ferromagnetic metal particles and a binder resin over the nonmagnetic layer, wherein said binder resins in said magnetic and nonmagnetic layers each comprises mainly a vinyl chloride resin, said ferromagnetic metal particles are surface-treated with at least an organic compound, and said magnetic layer has a thickness of from 0.05 to 1.0 .mu.m.
摘要翻译： （1）公开了一种磁记录系统，其包括薄膜磁头和磁记录介质，该磁记录介质包括其上具有主要包含铁磁颗粒和粘合剂树脂的磁性层的非磁性载体，其中所述粘合剂树脂主要包含氯乙烯 树脂，并且所述铁磁颗粒用至少一种有机化合物进行表面处理。 （2）公开了另一种磁记录系统，其包括薄膜磁头和包括非磁性载体的磁记录介质，主要包含无磁性非磁性颗粒的非磁性层和在非磁性载体上的粘合剂树脂，以及包括 主要是非磁性层上的铁磁金属颗粒和粘合剂树脂，其中所述磁性和非磁性层中的所述粘合剂树脂主要包含氯乙烯树脂，所述强磁性金属颗粒用至少一种有机化合物进行表面处理，并且所述磁性层 厚度为0.05〜1.0μm。
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公开(公告)号：US4847156A
公开(公告)日：1989-07-11
申请号：US110401
申请日：1987-10-20
IPC分类号： G11B5/702
CPC分类号： G11B5/702 , G11B5/7028 , Y10S428/90 , Y10T428/31609
摘要： A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer containing (a) ferromagnetic particles, (b) a binder containing at least one resin substituted with at least one polar group selected from an --SO.sub.3 M group, a --COOM group, an --OSO.sub.3 M group, an ##STR1## group and a ##STR2## group, wherein M represents H, Li, Na or K and M' represents H, Li, Na, K or an alkyl group, and (c) at least one fatty acid lubricating agent comprising at least one fatty acid derivative represented by formula (I): ##STR3## in which R represents a hydrocarbon group having from 11 to 21 carbon atoms, X represents hydrogen or a methyl group, R' represents a hydrocarbon group having from 1 to 8 carbon atoms and n is an integer of from 2 to 20.
摘要翻译： 一种磁记录介质，包括其上具有磁性层的非磁性载体，所述磁性层含有（a）铁磁颗粒，（b）含有至少一种被至少一个选自-SO 3 M基团，-COOM基团的极性基团取代的树脂的粘合剂 ，-OSO3M基团，
基团和 基团，其中M表示H，Li，Na或K，M'表示H，Li，Na，K或烷基，（c）至少 一种脂肪酸润滑剂，其包含至少一种式（I）表示的脂肪酸衍生物：其中R表示具有11至21个碳原子的烃基，X表示氢或甲基，R' 表示碳原子数为1〜8的烃基，n为2〜20的整数。 -
公开(公告)号：US4626469A
公开(公告)日：1986-12-02
申请号：US505505
申请日：1983-06-17
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording material, which comprises a magnetic layer coated on a non-magnetic support is disclosed. The magnetic layer contains both carbon black fine powder having a mean primary grain size of less than 10 m.mu. and carbon black coarse powder having a mean primary grain size in the range of 50 to 120 m.mu. in a mixing ratio ranging from 95/5 to 5/95. The material is improved in both RF output and audio output.
摘要翻译： 公开了一种磁记录材料，其包括涂覆在非磁性载体上的磁性层。 磁性层含有平均一次粒径小于10μm的炭黑细粉末和平均一次粒径在50〜120μm的范围内的混合比例为95/5的碳黑粗粉末 至5/95。 该材料在射频输出和音频输出两方面得到改进。
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公开(公告)号：US4614685A
公开(公告)日：1986-09-30
申请号：US598093
申请日：1984-04-09
申请人： Katsumi Ryoke , Kenichi Masuyama , Eiichi Tadokoro
发明人： Katsumi Ryoke , Kenichi Masuyama , Eiichi Tadokoro
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium comprised of a non-magnetic support base having a magnetic layer provided thereon is disclosed. The magnetic layer is comprised of carbon black having an average particle size of 30 to 50 m.mu. and an iron oxide which contains Co. The iron oxide containing the Co has a specific surface area of 25 m.sup.2 /g or more. The carbon black and the iron oxide containing the Co are dispersed in a binder. By utilizing the particular type of carbon black in combination with the particular iron oxide containing Co in the magnetic layer it is possible to greatly improve the running characteristics of the magnetic recording medium as well as obtain an improved RF output.
摘要翻译： 公开了一种磁记录介质，其包括具有设置在其上的磁性层的非磁性支撑基底。 磁性层由平均粒径为30〜50μm的碳黑和含有Co的氧化铁构成。含有Co的氧化铁的比表面积为25m 2 / g以上。 含有Co的炭黑和氧化铁分散在粘合剂中。 通过将特定类型的炭黑与在磁性层中含有Co的特定氧化铁组合使用，可以极大地改善磁记录介质的运行特性并获得改进的RF输出。
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公开(公告)号：US4539257A
公开(公告)日：1985-09-03
申请号：US599917
申请日：1984-04-13
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/265
摘要： A magnetic recording medium comprised of a nonmagnetic support base having a magnetic layer provided thereon is disclosed. The magnetic layer includes ferromagnetic particles dispersed in a binder in combination with carbon black particles. The carbon black particles have an average primary particle size in the range of 30 m.mu. to 50 m.mu.. Further, the carbon black is capable of the adsorption of 120 ml or more of dibutyl phthalate per 100 g of carbon black. By utilizing the particular carbon black of the present invention it is possible to obtain a magnetic recording medium having improved running properties.
摘要翻译： 公开了一种由其上设置有磁性层的非磁性支撑基体构成的磁记录介质。 磁性层包括分散在粘合剂中的炭黑颗粒与炭黑颗粒的组合。 炭黑粒子的平均一次粒径在30μm〜50μm的范围内。 此外，炭黑能够每100g炭黑吸附120ml或更多的邻苯二甲酸二丁酯。 通过利用本发明的特定炭黑，可以获得具有改善的运行特性的磁记录介质。
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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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公开(公告)号：US5336561A
公开(公告)日：1994-08-09
申请号：US868096
申请日：1992-04-14
IPC分类号： G11B5/702 , C09D5/23 , C09D167/00 , C09D175/04 , G11B5/73 , G11B5/738 , B32B5/16 , G11B5/66
CPC分类号： G11B5/738 , Y10S428/90 , Y10T428/265 , Y10T428/31609 , Y10T428/31736 , Y10T428/31786 , Y10T428/31797
摘要： A magnetic recording medium comprising a non-magnetic support having thereon an undercoating layer and a magnetic layer, wherein the undercoating layer is provided between the non-magnetic support and magnetic layer, and a binder used for the undercoating layer comprises a resin having an elution amount of 0.05 to 0.4 mg/cm.sup.2 when placed in a mixed solvent of methyl ethyl ketone and cyclohexanone having a weight ratio of 1:1 at 25.degree. C. for 30 seconds.
摘要翻译： 一种磁记录介质，包括其上具有底涂层和磁性层的非磁性载体，其中底涂层设置在非磁性载体和磁性层之间，并且用于底涂层的粘合剂包括具有洗脱作用的树脂 在25℃下重量比为1:1的甲基乙基酮和环己酮的混合溶剂中，为0.05〜0.4mg / cm2。
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公开(公告)号：US4106067A
公开(公告)日：1978-08-08
申请号：US724430
申请日：1976-09-17
CPC分类号： G11B5/41
摘要： A cleaning jacket for a magnetic head used for flexible discs comprising a cleaning sheet and a sheet retaining jacket, the cleaning sheet comprising a flexible and non-magnetizable support, at least on one surface of which is provided an antistatic layer and on the other surface of which is provided a cleaning layer of a fibrous material, the retaining jacket having the shape of a flat casing and defining a space in which the cleaning sheet can be kept in such a manner that it can rotate freely therein, and, further, having a lubricating layer provided on the inner wall thereof facing the antistatic layer of the cleaning sheet.
摘要翻译： 一种用于用于柔性盘的磁头的清洁护套，包括清洁片和片材保持护套，所述清洁片包括柔性和不可磁化的支撑件，至少在其一个表面上设置有抗静电层，并且在另一表面上 其中提供了纤维材料的清洁层，该保持套具有扁平壳体的形状，并且限定了可以以可自由旋转的方式保持清洁片的空间，并且还具有 设置在面向清洁片的抗静电层的内壁上的润滑层。
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公开(公告)号：US5631062A
公开(公告)日：1997-05-20
申请号：US248246
申请日：1994-05-24
申请人： Kenichi Masuyama , Hiroaki Takano , Kazuo Kato , Kazuko Hanai , Noburo Hibino
发明人： Kenichi Masuyama , Hiroaki Takano , Kazuo Kato , Kazuko Hanai , Noburo Hibino
CPC分类号： G11B5/738 , G11B5/70 , Y10S428/90 , Y10T428/24355 , Y10T428/24372
摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic layer, wherein the magnetic layer is provided on one surface of the nonmagnetic support, comprises a ferromagnetic particle, and has a surface roughness of from 2 to 10 nm; the nonmagnetic support has plural layers; at least one layer of the plural layers comprises an antistatic agent; and the nonmagnetic support has a surface roughness of from 5 to 30 nm on the opposite surface to the surface on which the magnetic layer is provided.
摘要翻译： 包括非磁性载体和磁性层的磁记录介质，其中所述磁性层设置在所述非磁性载体的一个表面上，包括铁磁颗粒，并且具有2至10nm的表面粗糙度; 非磁性载体具有多层; 至少一层多层包括抗静电剂; 并且非磁性载体在与设置有磁性层的表面相反的表面上具有5至30nm的表面粗糙度。
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公开(公告)号：US5582910A
公开(公告)日：1996-12-10
申请号：US384797
申请日：1995-02-06
CPC分类号： G11B5/716 , G11B5/842 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium having improved electromagnetic characteristics and running properties is disclosed. The magnetic recording medium comprises a non-magnetic support having thereon a plurality of magnetic layers consisting of two or more layers composed of a first lower magnetic layer and a second upper magnetic layer, provided on said support by either co-coating the lower magnetic layer and the upper magnetic layer in the wet state, or coating the lower magnetic layer and then the upper magnetic layer while the lower magnetic layer is still in the wet state; wherein the cobalt-modified iron oxide is employed as the ferromagnetic powder contained in the lower magnetic layer, ferromagnetic metal is employed as the ferromagnetic powder contained in the upper magnetic layer, both the ferromagnetic powder contained in the lower magnetic layer and the ferromagnetic powder contained in the upper magnetic layer having an average major axis length of 0.25 .mu.m or less and an average acicular ratio of 10 or less, a difference in the average major axis length between the ferromagnetic powder contained in the lower magnetic layer and that contained in the upper magnetic layer of 0.08 .mu.m or less, and a difference in the average acicular ratio between the ferromagnetic powder contained in the lower layer and that contained in the upper layer of 4 or less.
摘要翻译： 公开了具有改进的电磁特性和运行特性的磁记录介质。 该磁记录介质包括非磁性载体，其上具有多个由两层或多层组成的磁性层，所述两层或更多层由第一下磁层和第二上磁层组成，所述第一下层磁性层和第二上层磁性层均设置在所述载体上， 在上部磁性层处于湿润状态，或者在下部磁性层仍然处于湿润状态的同时涂覆下部磁性层，然后涂覆上部磁性层; 其中使用钴改性的氧化铁作为包含在下磁性层中的铁磁粉末，使用强磁性金属作为包含在上磁性层中的铁磁性粉末，包含在下磁性层中的铁磁性粉末和含有铁磁性粉末 在平均长轴长度为0.25μm以下且平均针状比为10以下的上磁性层中，下磁性层中含有的铁磁性粉末与包含在下磁性层中的平均长轴长度的差异 上磁性层为0.08μm以下，下层含有的铁磁性粉末与上层中所含的铁磁性粉末的平均针状比为4以下。
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