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    Magnetic recording medium
    1.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4619856A

    公开(公告)日：1986-10-28

    申请号：US737968

    申请日：1985-05-28

    申请人： Koh Kamada ,  Hiroshi Hashimoto ,  Tsutomu Okita ,  Noburo Hibino

    发明人： Koh Kamada ,  Hiroshi Hashimoto ,  Tsutomu Okita ,  Noburo Hibino

    IPC分类号： G11B5/73 ,  G11B5/70

    CPC分类号： G11B5/7305 ,  Y10S428/90 ,  Y10T428/24372 ,  Y10T428/24413 ,  Y10T428/25 ,  Y10T428/31935

    摘要： A magnetic recording medium is described, comprising a nonmagnetic support, a magnetic layer, and a nonmagnetic intermediate layer provided between the support and the magnetic layer, the nonmagnetic intermediate layer containing a radiation-polymerizable compound and finely divided particles, the nonmagnetic intermediate layer being polymerized by irradiation and having a surface roughness from about 0.001 to 0.02 .mu.m. This medium provides reduced gap loss between the medium and a magnetic head, and is suitable for use in high density recording.

    摘要翻译： 描述了一种磁记录介质，其包括设置在载体和磁性层之间的非磁性载体，磁性层和非磁性中间层，非磁性中间层含有可辐射聚合化合物和细碎颗粒，非磁性中间层为 通过照射聚合并具有约0.001至0.02μm的表面粗糙度。 该介质在介质和磁头之间提供减小的间隙损失，并且适用于高密度记录。

    Process for preparing a magnetic recording medium
    2.
    发明授权
    Process for preparing a magnetic recording medium 失效
    磁记录介质的制备方法

    公开(公告)号：US4673590A

    公开(公告)日：1987-06-16

    申请号：US833680

    申请日：1986-02-25

    申请人： Hiroshi Hashimoto ,  Tsutomu Okita ,  Noburo Hibino

    发明人： Hiroshi Hashimoto ,  Tsutomu Okita ,  Noburo Hibino

    IPC分类号： G11B5/73 ,  G11B5/84 ,  H01F10/02

    CPC分类号： G11B5/84 ,  G11B5/7305

    摘要： A process for preparing a magnetic recording medium is disclosed, which comprises (1) subjecting a surface of a non-magnetic support having a surface roughness of not less than 0.01 .mu.m to an abrasion treatment or a calendering treatment, (2) coating a layer containing a compound polymerizable by radiation exposure on the surface of non-magnetic support, (3) exposing the layer to radiation to polymerize and harden the same, and (4) providing a magnetic layer on the radiation exposed layer. The thus prepared magnetic recording medium is not accompanied by dropout due to "fish eyes" and is suitable for high density recording.

    摘要翻译： 公开了一种制备磁记录介质的方法，其包括：（1）对具有不小于0.01μm的表面粗糙度的非磁性载体的表面进行磨损处理或压延处理，（2） 包含通过辐射暴露可聚合的化合物在非磁性载体的表面上，（3）将该层暴露于辐射以聚合并使其硬化，以及（4）在辐射暴露层上提供磁性层。 这样制备的磁记录介质不伴随“鱼眼”的脱落，适用于高密度记录。

    Method for production of magnetic recording media
    3.
    发明授权
    Method for production of magnetic recording media 失效
    磁记录介质的制造方法

    公开(公告)号：US4481231A

    公开(公告)日：1984-11-06

    申请号：US559534

    申请日：1983-12-08

    申请人： Hiroshi Hashimoto ,  Tsutomu Okita ,  Noburo Hibino

    发明人： Hiroshi Hashimoto ,  Tsutomu Okita ,  Noburo Hibino

    IPC分类号： G11B5/70 ,  C09D5/23 ,  C09D175/00 ,  C09D175/06 ,  G11B5/702 ,  G11B5/73 ,  G11B5/842 ,  H01F10/02

    CPC分类号： G11B5/7023 ,  G11B5/7026

    摘要： A method for the production of a magnetic recording medium is disclosed. The method involves coating a support base with a magnetic coating composition. The support base has a percent thermal shrinkage in the direction corresponding to the longitudinal direction of the support base of not more than 0.15%. The magnetic coating composition contains a compound having not less than two acrylate groups or methacrylate groups in the molecule and includes ferromagnetic fine powder dispersed therein. After coating the magnetic coating composition on the support base it is irradiated with an electron beam. The resulting medium has excellent electromagnetic properties, durability and improved tape skew characteristics. Further, the composition has good storage stability.

    摘要翻译： 公开了一种制造磁记录介质的方法。 该方法包括用磁性涂料组合物涂覆支撑基底。 支撑基部在与支撑基部的纵向方向对应的方向上的热收缩百分比不大于0.15％。 磁性涂料组合物含有分子中具有不少于2个丙烯酸酯基或甲基丙烯酸酯基的化合物，其中分散有铁磁细粉。 将磁性涂料组合物涂布在支撑体上后，用电子束照射。 所得到的介质具有优异的电磁特性，耐久性和改进的带偏斜特性。 此外，组合物具有良好的储存稳定性。

    Magnetic recording medium
    5.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4663209A

    公开(公告)日：1987-05-05

    申请号：US724231

    申请日：1985-04-17

    申请人： Masashi Aonuma ,  Masaaki Suzuki ,  Satoshi Sakakibara ,  Noburo Hibino ,  Koh Kamada

    发明人： Masashi Aonuma ,  Masaaki Suzuki ,  Satoshi Sakakibara ,  Noburo Hibino ,  Koh Kamada

    IPC分类号： G11B5/70 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/714 ,  G11B5/73 ,  G11B5/704

    CPC分类号： G11B5/7305 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/31786

    摘要： Magnetic recording medium is disclosed which comprises a non-magnetic support having coated thereon a magnetic layer mainly containing ferromagnetic metal particles and a binder:(1) wherein the non-magnetic support is a polyester film having a thickness of 4 to 12 .mu.m, (b) an F5 value in a machine direction of 16 kg/mm.sup.2 or more, (c) a breaking strength in a machine direction of 25 kg/mm.sup.2 or more, (d) a breaking elongation in a machine direction of 90% or less, (e) a surface roughness (Ra) of 0.01 to 0.03 .mu.m, and (f) a fish eye (FE), which is shown in terms of height (H), of 6H or more having 0 per 100 cm.sup.2, a fish eye of 5H having 2 or less per 100 cm.sup.2 and a fish eye of 4H having 5 or less per 100 cm.sup.2 ;(2) wherein the ferromagnetic metal particles have (a) a saturation magnetization (.sigma.s) of 110 to 160 emu/g, and (b) a specific surface area measured by the BET method of 25 to 65 m.sup.2 /g; and(3) wherein the magnetic layer has (a) a coercive force (Hc) of 700 Oe or more, (b) a surface roughness (Ra) of 0.015 .mu.m or less and (c) a thickness of 1.5 to 4.5 .mu.m.

    摘要翻译： 公开了一种磁记录介质，其包括其上涂覆有主要包含铁磁性金属颗粒和粘合剂的磁性层的非磁性载体：（1）其中非磁性载体为厚度为4至12μm的聚酯膜， （b）机器方向的F5值为16kg / mm 2以上，（c）机器方向的断裂强度为25kg / mm 2以上，（d）机器方向的断裂伸长率为90％， （e）表面粗糙度（Ra）为0.01〜0.03μm，（f）以高度（H）表示的每100cm 2为0以上的6H以上的鱼眼（FE） 5H的鱼眼每100cm 2具有2个或更少的鱼眼，4H的鱼眼具有每100cm 2具有5个或更少的鱼眼; （2）其中铁磁金属颗粒具有（a）110至160emu / g的饱和磁化强度（σ），和（b）通过BET法测量的比表面积为25至65m 2 / g; 和（3）其中磁性层具有（a）700Oe以上的矫顽力（Hc），（b）0.015μm以下的表面粗糙度（Ra）和（c）1.5〜4.5μm的厚度 m。

    Photographic polyester film support
    6.
    发明授权
    Photographic polyester film support 失效
    摄影聚酯薄膜支持

    公开(公告)号：US4215030A

    公开(公告)日：1980-07-29

    申请号：US938162

    申请日：1978-08-30

    申请人： Tsutomu Okita ,  Masami Satou ,  Noburo Hibino ,  Kazunobu Katoh ,  Hiroshi Sawaguchi

    发明人： Tsutomu Okita ,  Masami Satou ,  Noburo Hibino ,  Kazunobu Katoh ,  Hiroshi Sawaguchi

    IPC分类号： C08L67/00 ,  C08L67/02 ,  C09B67/22 ,  G03C1/795 ,  G03C1/83 ,  C08K5/08 ,  C08K5/34

    CPC分类号： G03C1/7954 ,  G03C1/83

    摘要： A photographic polyester film support dyed with a dye having a main absorption peak in the wavelength range of about 350 to about 570 nm, a dye having a main absorption peak in the wavelength range of about 640 to about 680 nm, and a dye having a main absorption peak in the wavelength range of about 420 to about 460 nm which is represented by the following formula (I) or (II): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents --H, --OH, --NH.sub.2, --NHR.sub.5, --NR.sub.5 R.sub.6, --Cl, --Br, an alkyl group having 4 or less carbon atoms or an alkoxy group having 4 or less carbon atoms; R.sub.5 and R.sub.6, which may be the same or different, each represents an alkyl group having 4 or less carbon atoms or an aryl group; X.sub.1 and X.sub.2, which may be the same or different, each represents --H, --Cl, --Br or an alkyl group having 4 or less carbon atoms; and Y represents --H, --Cl or --Br, with the proviso that R.sub.1, R.sub.2, R.sub.3 and R.sub.4 in the formula (I) are not simultaneously --H.

    摘要翻译： 用在约350至约570nm的波长范围内具有主吸收峰的染料染色的照相聚酯膜载体，在640-680nm波长范围内具有主吸收峰的染料和具有 由下式（I）或（II）表示的约420至约460nm的波长范围内的主要吸收峰：其中R1，R2，R3和R4， 其可以相同或不同，各自表示-H，-OH，-NH2，-NHR5，-NR5R6，-Cl，-Br，具有4个或更少碳原子的烷基或具有4个或更少碳原子的烷氧基 ; R 5和R 6可以相同或不同，各自表示具有4个以下碳原子的烷基或芳基; X 1和X 2可以相同或不同，各自表示-H，-Cl，-Br或具有4个或更少碳原子的烷基; 并且Y表示-H，-Cl或-Br，条件是式（I）中的R 1，R 2，R 3和R 4不同时为-H。

    Photographic polyester film support
    7.
    发明授权
    Photographic polyester film support 失效
    摄影聚酯薄膜支持

    公开(公告)号：US4191679A

    公开(公告)日：1980-03-04

    申请号：US938161

    申请日：1978-08-30

    申请人： Tsutomu Okita ,  Masami Satou ,  Noburo Hibino ,  Kazunobu Katoh ,  Masatoshi Sugiyama

    发明人： Tsutomu Okita ,  Masami Satou ,  Noburo Hibino ,  Kazunobu Katoh ,  Masatoshi Sugiyama

    IPC分类号： C08L67/00 ,  C09B1/42 ,  G03C1/795 ,  G03C1/83 ,  C08K5/08 ,  G03C1/84

    CPC分类号： G03C1/83

    摘要： A photographic polyester film support which is dyed with (a) a dye having a main absorption peak in the wavelength range of about 530 to about 570 nm, (b) a dye having a main absorption peak in the wavelength range of about 640 to about 680 nm and (c) a dye having a main absorption peak in the wavelength range of about 420 to about 460 nm which is represented by the formula (I) below: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents --H, --OH, --NH.sub.2, --NHR.sub.7, --NR.sub.7 R.sub.8, --Cl, --Br, an alkyl group having 4 or less carbon atoms or an alkoxy group having 4 or less carbon atoms; and R.sub.7 and R.sub.8, which may be the same or different, each represents an alkyl group having 4 or less carbon atoms or an aryl group.

    摘要翻译： 一种照相聚酯膜载体，其用（a）在约530至约570nm的波长范围内具有主要吸收峰的染料染色，（b）在约640至约波长范围内具有主吸收峰的染料 680nm，和（c）由下式（I）表示的在大约420至大约460nm的波长范围内具有主吸收峰的染料：其中R1，R2，R3，R4， R 5和R 6可以相同或不同，表示-H，-OH，-NH2，-NHR7，-NR7R8，-Cl，-Br，具有4个或更少碳原子的烷基或具有4个 或更少的碳原子; 和可以相同或不同的R 7和R 8各自表示具有4个以下碳原子的烷基或芳基。

    Magnetic recording medium
    8.
    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。