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56 条记录 (耗时 0.021 秒)

    Magnetic recording member
    2.
    发明授权
    Magnetic recording member 失效
    磁记录部件

    公开(公告)号：US4154895A

    公开(公告)日：1979-05-15

    申请号：US862330

    申请日：1977-12-20

    申请人： Hiroshi Ogawa ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Yasuo Tamai

    发明人： Hiroshi Ogawa ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Yasuo Tamai

    IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/706 ,  G11B5/708 ,  H01F10/02

    CPC分类号： G11B5/70621 ,  G11B5/7021 ,  G11B5/70615 ,  Y10S428/90 ,  Y10T428/31565 ,  Y10T428/31609

    摘要： In a magnetic recording member comprising a non-magnetic support having provided thereon a magnetic layer comprising finely divided ferromagnetic powders dispersed in a binder, in which the binder comprises about 10 to about 70 wt% of (a) a polyester-polyurethane resin and about 30 to about 90 wt% of (b) a synthetic non-drying oil modified alkyd resin and (c) a polyisocyanate, wherein the molar ratio of the isocyanate groups present in the polyisocyanate (c) to the hydroxyl groups present in the synthetic non-drying oil-modified alkyd resin (b) ranges from about 0.8:1 to about 2.0:1. The binder system in accordance with the present invention provides excellent magnetic properties, particularly improved squareness ratio and 5 MHz output. The binder system of the present invention also enables the use of finely divided ferromagnetic alloy powders, with excellent magnetic properties being maintained when magnetic recording members are produced therefrom.

    摘要翻译： 在包括非磁性载体的磁记录元件中，其上设置有包含分散在粘合剂中的细碎铁磁粉末的磁性层，其中粘合剂包含约10至约70重量％的（a）聚酯 - 聚氨酯树脂和约 30重量％至约90重量％的（b）合成非干性油改性醇酸树脂和（c）多异氰酸酯，其中存在于多异氰酸酯（c）中的异氰酸酯基与存在于合成非离子表面活性剂中的羟基的摩尔比 干燥油改性醇酸树脂（b）的范围为约0.8:1至约2.0:1。 根据本发明的粘结剂体系提供优异的磁性，特别是改进的矩形比和5MHz的输出。 本发明的粘合剂体系还能够使用精细分散的铁磁性合金粉末，当由其制造磁性记录元件时，其具有优异的磁性能。

    Magnetic recording medium
    4.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4009111A

    公开(公告)日：1977-02-22

    申请号：US624017

    申请日：1975-10-20

    申请人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    发明人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    IPC分类号： B22F9/24 ,  C22C33/02 ,  G11B5/706 ,  B22F3/00 ,  C22C1/04 ,  H01F1/02

    CPC分类号： G11B5/70621 ,  B22F9/24 ,  C22C33/0285 ,  G11B5/70615

    摘要： A magnetic recording medium for high density recording comprising a support having thereon a magnetic recording layer comprising a ferromagnetic metal powder of the Fe-Co-Cr-B system and having a coercive force of about 700 to 1500 orsteds in the oriented direction of the magnetic substance and a residual magnetic flux density of about 1500 gauses or more, the residual magnetic flux density of which after storage for 160 hours under the conditions of a temperature of 60.degree. C and 90%RH is 85% or more of the initial value thereof before storage under these conditions in a binder. The magnetic recording medium is especially suitable for high density recording, having sufficient sensitivity and excellent resistance.

    摘要翻译： 一种用于高密度记录的磁记录介质，包括其上具有磁记录层的载体，所述磁记录层包含Fe-Co-Cr-B系统的铁磁性金属粉末，并且在磁性方向上具有约700至1500埃的矫顽力 物质和剩余磁通密度约为1500高斯或以上，在60℃，90％RH的温度条件下保存160小时后的剩余磁通密度为初始值的85％以上 在这些条件下在粘合剂中储存之前。 磁记录介质特别适用于高密度记录，具有足够的灵敏度和优异的电阻。

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

    公开(公告)号：US3943012A

    公开(公告)日：1976-03-09

    申请号：US498337

    申请日：1974-08-19

    申请人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    发明人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/047 ,  H01F1/02

    CPC分类号： G11B5/70615 ,  G11B5/70621

    摘要： A magnetic recording medium for high density recording comprising a support having thereon a magnetic recording layer comprising a ferromagnetic metal powder of the Fe-Co-Cr-B system and having a coercive force of about 700 to 500 oersteds in the oriented direction of the magnetic substance and a residual magnetic flux density of about 1500 gausses or more, the residual magnetic flux density of which after storage for 160 hours under the conditions of a temperature of 60.degree.C and 90%RH is 85% or more of the initial value thereof before storage under these conditions in a binder. The magnetic recording medium is especially suitable for high density recording, having sufficient sensitivity and excellent resistance.

    摘要翻译： 一种用于高密度记录的磁记录介质，包括其上具有包含Fe-Co-Cr-B系统的铁磁金属粉末的磁记录层的支撑体，并且在磁性方向上具有约700至500奥斯特的矫顽力 物质和约1500高斯或更高的剩余磁通密度，其在60℃和90％RH的温度条件下储存160小时后的剩余磁通密度为其初始值的85％或更多 在这些条件下在粘合剂中储存之前。 磁记录介质特别适用于高密度记录，具有足够的灵敏度和优异的电阻。

    Magnetic recording medium
    10.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4246316A

    公开(公告)日：1981-01-20

    申请号：US887766

    申请日：1978-03-17

    申请人： Masashi Aonuma ,  Yasuo Tamai

    发明人： Masashi Aonuma ,  Yasuo Tamai

    IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/716 ,  H01F1/06

    CPC分类号： G11B5/716 ,  Y10S428/90 ,  Y10T428/12049 ,  Y10T428/12569 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/2936

    摘要： This invention relates to a magnetic recording medium comprising a non-magnetic support and magnetic layer provided thereon containing a ferromagnetic metal powder, the magnetic layer having a multilyaer structure consisting of a lower layer containing acicular grains obtained by dry process reduction and an upper layer containing chain-like grains obtained by wet process reduction, the upper layer being provided on the lower layer. This magnetic recording medium is particularly suitable for high density recording.

    摘要翻译： 本发明涉及一种包含非磁性载体和磁性层的磁记录介质，其中含有强磁性金属粉末，该磁性层具有多层结构，该多层结构由含有通过干法还原获得的针状颗粒的下层和含有 通过湿法还原获得的链状颗粒，上层设置在下层上。 该磁记录介质特别适用于高密度记录。