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18 条记录 (耗时 0.024 秒)

    Magnetic recording medium
    11.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5139866A

    公开(公告)日：1992-08-18

    申请号：US588880

    申请日：1990-09-27

    申请人： Hiroaki Araki ,  Kenichi Yoden ,  Akira Ushimaru

    发明人： Hiroaki Araki ,  Kenichi Yoden ,  Akira Ushimaru

    IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/70 ,  G11B5/702 ,  G11B5/714

    CPC分类号： G11B5/714 ,  G11B5/70 ,  G11B5/7028 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

    摘要： A magnetic recording medium excellent in electromagnetic conversion characteristics and running characteristics is disclosed, which comprises a non-magnetic support and a magnetic layer formed thereon, said magnetic layer containing ferromagnetic particles dispersed in a binder, wherein said magnetic layer comprises a number of pores, said pores having(a) a total volume of not more than 0.1 ml/g per unit weight of said magnetic layer,(b) an average inlet radius of not more than 100 .ANG., and(c) an average inner radius larger than said average inlet radius and a difference of at least 50 .ANG. therebetween. The pores preferably have a total pore volume of 0.03 to 0.1 ml/g measured by a nitrogen gas absorption method and an average pore inlet radius of not more than 50 .ANG., and the magnetic layer contains a fluorine-containing ester compound.

    摘要翻译： 公开了一种电磁转换特性和运行特性优异的磁记录介质，其包括非磁性支持体和形成在其上的磁性层，所述磁性层含有分散在粘合剂中的铁磁性颗粒，其中所述磁性层包含多个孔， 所述孔具有（a）每单位重量的所述磁性层的总体积不超过0.1ml / g，（b）平均入口半径不大于100，以及（c）平均内半径大于所述 平均入口半径和它们之间的至少50个ANGSTROM的差。 通过氮气吸收法和平均孔入口半径不大于50，测得的孔隙总孔容积为0.03〜0.1ml / g，磁性层含有含氟酯化合物。

    Magnetic recording medium comprising plural magnetic layers
    14.
    发明授权
    Magnetic recording medium comprising plural magnetic layers 失效
    包含多个磁性层的磁记录介质

    公开(公告)号：US5132179A

    公开(公告)日：1992-07-21

    申请号：US679394

    申请日：1991-04-02

    申请人： Hiroshi Hashimoto ,  Akira Ushimaru

    发明人： Hiroshi Hashimoto ,  Akira Ushimaru

    IPC分类号： G11B5/702 ,  B05D1/36 ,  B32B27/00 ,  B32B27/18 ,  B32B27/38 ,  B32B33/00 ,  C09D5/23 ,  C09D163/00 ,  C09D175/00 ,  C09D175/04 ,  G11B5/716

    CPC分类号： G11B5/716 ,  Y10S428/90 ,  Y10T428/2991 ,  Y10T428/2998 ,  Y10T428/31609

    摘要： A magnetic recording medium comprising a non-magnetic support having thereon plural magnetic layers comprising a fine ferromagnetic powder and a binder and which are composed of at least two magnetic layers. In preparing the medium, a first magnetic layer-coating composition containing an epoxy compound having at least two epoxy groups is coated on the nonmagnetic support and a second magnetic layer-coating composition containing a polyisocyanate compound is coated over the first magnetic layer with a simultaneous or successive multiple layered coating method. The medium has an excellent electromagnetic characteristic and yields few dropouts, and it is usable as a medium for high density recording.

    摘要翻译： 一种磁记录介质，包括一个非磁性载体，其上有多个包含细铁磁性粉末和粘合剂的磁性层，并由至少两个磁性层组成。 在制备介质时，将含有至少两个环氧基团的环氧化合物的第一磁性层涂料组合物涂覆在非磁性载体上，并且含有多异氰酸酯化合物的第二磁性层涂料组合物涂覆在第一磁性层上，同时 或连续多层涂布法。 该介质具有优异的电磁特性，并且产生较少的压差，并且可用作用于高密度记录的介质。

    Magnetic recording medium
    16.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4861674A

    公开(公告)日：1989-08-29

    申请号：US238067

    申请日：1988-08-30

    申请人： Hiroo Inaba ,  Akira Ushimaru ,  Nobuyuki Yamamoto ,  Noburo Hibino ,  Kenzo Iwamoto

    发明人： Hiroo Inaba ,  Akira Ushimaru ,  Nobuyuki Yamamoto ,  Noburo Hibino ,  Kenzo Iwamoto

    IPC分类号： G11B5/706 ,  C09D5/23 ,  G11B5/73 ,  G11B5/84

    CPC分类号： G11B5/84 ,  G11B5/7305 ,  Y10S428/90

    摘要： A magnetic recording medium is disclosed, which comprises a non-magnetic support having coated thereon a magnetic layer, said non-magnetic support being a film substantially composed of polyethylene terephthalate and having a cutting index (Z) of 6 or less as defined by equation (1):Z=383.3-2.76A-2000B+840.DELTA.n (1)wherein A is the haze value, B is the surface orientation coefficient represented by {(n.sub.MD +n.sub.TD)/2}-n.sub.ZD, n.sub.MD is the refractive index in the machine direction, n.sub.TD is the refractive index in the transverse direction, n.sub.ZD is the refractive index in the thickness direction, and .DELTA.n is the difference of the refractive indices represented by n.sub.MD -n.sub.TD ; and said magnetic layer has yield elongation (L) of 10% or lower and requires energy (E) of 1.0 kg/mm.sup.2 or less to reach the yield point.

    摘要翻译： 公开了一种磁记录介质，其包括其上涂覆有磁性层的非磁性载体，所述非磁性载体是基本上由聚对苯二甲酸乙二醇酯组成的膜，其切割指数（Z）为6或更小，如式 （1）：Z = 383.3-2.76A-2000B + 840 DELTA n（1）其中A是雾度值，B是由{（nMD + nTD）/ 2} -nZD表示的表面取向系数，nMD是折射率 指数在纵向上，nTD是横向的折射率，nZD是厚度方向的折射率，并且DELTA n是由nMD-nTD表示的折射率的差; 所述磁性层的屈服伸长率（L）为10％以下，能量（E）为1.0kg / mm 2以下，达到屈服点。

    Process for producing magnetic recording material
    17.
    发明授权
    Process for producing magnetic recording material 失效
    磁记录材料的制造方法

    公开(公告)号：US4428974A

    公开(公告)日：1984-01-31

    申请号：US447597

    申请日：1982-12-07

    申请人： Tsutomu Okita ,  Kyoichi Naruo ,  Akira Ushimaru

    发明人： Tsutomu Okita ,  Kyoichi Naruo ,  Akira Ushimaru

    IPC分类号： G11B5/702 ,  B05D3/06 ,  C09D5/23 ,  C09D133/04 ,  C09D133/08 ,  C09D175/04 ,  G11B5/84 ,  G11B5/842

    CPC分类号： B05D3/068 ,  G11B5/84 ,  G11B5/842

    摘要： A process for producing a magnetic recording material having excellent electromagnetic characteristics and sufficient abrasion resistance is disclosed. The process comprises the steps of coating on a support a magnetic recording composition containing a compound having an unsaturated bond polymerizable by irradiation with electron beams, an organic solvent capable of dissolving the compound and a ferromagnetic powder. The compound is subjected in sequence to a coating process on a nonmagnetic support, irradiated with an electron beam in an atmosphere containing oxygen at a concentration of 10,000 ppm or more and subjected to a smoothening treatment utilizing a specular surface, followed by an electron beam irradiation in an atmosphere containing oxygen at a concentration of 3,000 ppm or less.

    摘要翻译： 公开了一种制造具有优异的电磁特性和足够耐磨性的磁记录材料的方法。 该方法包括以下步骤：在载体上涂覆含有通过电子束照射可聚合的具有不饱和键的化合物的磁记录组合物，能够溶解化合物的有机溶剂和铁磁性粉末。 将化合物依次涂覆在非磁性载体上，在含有浓度为10,000ppm以上的氧的气氛中用电子束照射，并使用镜面进行平滑化处理，然后进行电子束照射 在含有浓度为3,000ppm以下的氧的气氛中。