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56 条记录 (耗时 0.062 秒)

    Magnetic recording medium
    35.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5908683A

    公开(公告)日：1999-06-01

    申请号：US844388

    申请日：1997-04-18

    申请人： Masaki Suzuki ,  Hiroo Inaba ,  Satoshi Matsubaguchi ,  Hiroaki Takano

    发明人： Masaki Suzuki ,  Hiroo Inaba ,  Satoshi Matsubaguchi ,  Hiroaki Takano

    IPC分类号： G11B5/70 ,  G11B5/733 ,  G11B5/738 ,  G11B5/708

    CPC分类号： G11B5/70 ,  G11B5/733 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265

    摘要： A magnetic recording medium comprises a non-magnetic substrate, a lower coating layer, which is overlaid upon the non-magnetic substrate and primarily contains a binder and inorganic particles dispersed in the binder, and a magnetic layer, which is overlaid upon the lower coating layer and is constituted of at least a single layer. The magnetic layer contains at least a binder and ferromagnetic metal particles dispersed in the binder. The thickness of the magnetic layer falls within the range of 0.05 .mu.m to 0.5 .mu.m. The surface roughness of a top magnetic layer is at most 3 nm. The lower coating layer contains a fatty acid. An increase in the number of small protrusions, which have a height of at least 30 nm, does not occur substantially on the surface of the magnetic layer after the magnetic recording medium has been stored for seven days under environmental conditions of a temperature of 60.degree. C. and a relative humidity of 90%.

    摘要翻译： 磁记录介质包括非磁性基底，下涂层，其覆盖在非磁性基底上并且主要包含分散在粘合剂中的粘合剂和无机颗粒以及覆盖在下涂层上的磁性层 层，并且由至少单层构成。 磁性层至少包含粘合剂和分散在粘合剂中的强磁性金属颗粒。 磁性层的厚度在0.05μm〜0.5μm的范围内。 顶层磁性层的表面粗糙度为3nm以下。 下涂层含有脂肪酸。 在磁记录介质已经在温度为60°的环境条件下储存了七天之后，磁性层的表面上基本上没有出现高度至少为30nm的小突起的数量的增加。 C.相对湿度为90％。

    Magnetic recording medium having an underlayer containing three different powders
    38.
    发明授权
    Magnetic recording medium having an underlayer containing three different powders 失效
    具有含有三种不同粉末的底层的磁记录介质

    公开(公告)号：US5672423A

    公开(公告)日：1997-09-30

    申请号：US378366

    申请日：1995-01-25

    申请人： Hiroo Inaba ,  Kiyomi Ejiri

    发明人： Hiroo Inaba ,  Kiyomi Ejiri

    IPC分类号： G11B5/738 ,  G11B5/68

    CPC分类号： G11B5/738 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/259 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magnetic recording medium containing a support having thereon in order, a non-magnetic layer unit and a magnetic layer unit, said magnetic recording medium having been produced by providing a non-magnetic layer unit containing at least one non-magnetic layer and comprising a non-magnetic powder dispersed in a binder on a non-magnetic support followed by providing, while the non-magnetic layer is still wet, a magnetic layer unit containing at least one magnetic layer and comprising a ferromagnetic powder dispersed in a binder on the non-magnetic layer, wherein the mean thickness of the magnetic layer is 1.0 .mu.m or less and the non-magnetic powder in the non-magnetic layer comprises (A) a tabular non-magnetic powder having a tabular size of from 0.01 to 0.3 .mu.m and an aspect ratio of from 3 to 20, or an acicular non-magnetic powder having a long axis of from 0.05 to 0.25 .mu.m and an aspect ratio of from 3 to 15, (B) a carbon black powder having a mean particle size of from 0.01 to 0.04 .mu.m and (C) a powder component having a larger mean particle size than the mean particle size of either powders (A) or (B).

    摘要翻译： 一种磁记录媒体，其中依次包含一个支撑体，一个非磁性层单元和一个磁性层单元，所述磁记录介质是通过提供一个包含至少一个非磁性层的非磁性层单元制成的， 非磁性粉末分散在非磁性载体上的粘合剂中，随后在非磁性层仍然是湿润的同时提供含有至少一个磁性层并包含分散在非粘合剂中的粘合剂中的铁磁性粉末的磁性层单元， - 磁性层，其中磁性层的平均厚度为1.0μm以下，非磁性层中的非磁性粉末包含（A）平板状的非磁性粉末，其平板状尺寸为0.01〜0.3μm m，纵横比为3〜20，或长轴为0.05〜0.25μm，长宽比为3〜15的针状非磁性粉末，（B）具有平均粒子的炭黑粉末 大小从0.01到0。 （C）具有比粉末（A）或（B）的平均粒径更大的平均粒径的粉末成分。

    Magnetic recording medium containing ferro magnetic powder, polar group containing resins in a specific ratio and carbon black of a specific size range
    39.
    发明授权
    Magnetic recording medium containing ferro magnetic powder, polar group containing resins in a specific ratio and carbon black of a specific size range 失效
    含有铁磁粉末，特定比例的含极性基团的树脂和特定尺寸范围的炭黑的磁记录介质

    公开(公告)号：US5126202A

    公开(公告)日：1992-06-30

    申请号：US190846

    申请日：1988-05-06

    申请人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    发明人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/714

    CPC分类号： G11B5/7023 ,  G11B5/708 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/2982 ,  Y10T428/31609

    摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises carbon black having an average particle diameter of from about 20 to 120 m.mu.; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sup.4 .sym. R.sub.3, or N.sup..sym. HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.

    摘要翻译： 一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约20至120μm的炭黑; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除所述氯乙烯树脂以外的至少一种树脂，其含有-SO 3 M，-OSO 2 M，-COOM， 其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N4（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。

    Magnetic recording medium
    40.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5112680A

    公开(公告)日：1992-05-12

    申请号：US185214

    申请日：1988-04-25

    申请人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    发明人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/714

    CPC分类号： G11B5/7085 ,  G11B5/7023 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/30

    摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises Al.sub.2 O.sub.3 particles having an average particle diameter of from about 0.1 to 0.5 .mu.m; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.

    摘要翻译： 一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约0.1至0.5μm的Al 2 O 3颗粒; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除了含有-SO 3 M，-OSO 2 M，-COOM和 其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。