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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：US06395400B1

    公开(公告)日：2002-05-28

    申请号：US09351325

    申请日：1999-07-12

    申请人： Hiroo Inaba ,  Masaki Suzuki ,  Hiroaki Takano ,  Masatoshi Takahashi

    发明人： Hiroo Inaba ,  Masaki Suzuki ,  Hiroaki Takano ,  Masatoshi Takahashi

    IPC分类号： B32B2708

    CPC分类号： G11B5/7305 ,  B32B27/20 ,  B32B27/34 ,  Y10S428/90 ,  Y10T428/31728 ,  Y10T428/31765

    摘要： A magnetic recording medium using a biaxially oriented aromatic polyamide film as a nonmagnetic support resulting in hardly any improper windings or edge damages. The magnetic recording medium includes a magnetic layer containing ferromagnetic powders dispersed in a binder formed on the nonmagnetic support, wherein the biaxially oriented aromatic support has a ratio of the loss tangent at a temperature of 40° C. to the loss tangent at a temperature of 100° C. of 0.7 or higher.

    摘要翻译： 使用双轴取向芳族聚酰胺薄膜作为非磁性载体的磁记录介质几乎不产生任何不正确的绕组或边缘损坏。 该磁记录介质包括含有分散在形成在非磁性载体上的粘合剂中的铁磁性粉末的磁性层，其中双轴取向芳族载体在40℃温度下的损耗角正切与在 100℃为0.7以上。

    Cleaning medium for magnetic recording devices, in which the cleaning medium includes a substrate, a lower coating layer containing non-magnetic inorganic particles, and a cleaning area
    2.
    发明授权
    Cleaning medium for magnetic recording devices, in which the cleaning medium includes a substrate, a lower coating layer containing non-magnetic inorganic particles, and a cleaning area 失效
    用于磁记录装置的清洁介质，其中清洁介质包括基底，含有非磁性无机颗粒的下涂层和清洁区

    公开(公告)号：US5847905A

    公开(公告)日：1998-12-08

    申请号：US789563

    申请日：1997-01-28

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

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

    IPC分类号： G11B5/187 ,  G11B5/41 ,  G11B15/62

    CPC分类号： G11B5/41 ,  G11B15/62 ,  G11B5/1871

    摘要： A cleaning medium for magnetic recording devices comprises a non-magnetic substrate and a lower coating layer, which is overlaid upon the non-magnetic substrate and primarily contains a binder and non-magnetic inorganic particles dispersed in the binder. The cleaning medium also comprises a cleaning layer, which is overlaid upon the lower coating layer and contains a binder and inorganic particles dispersed in the binder, the inorganic particles at least containing ferromagnetic particles. The thickness of the cleaning layer falls within the range of 0.05 .mu.m to 1.0 .mu.m, and the squareness ratio of the cleaning layer falls within the range of 0.6 to 0.98. The cleaning medium yields little wear of magnetic heads, has good cleaning characteristics, and is capable of trueing up the shape of an end of a cleaned magnetic head into a sharp shape, such that the compatibility of the magnetic head with both of a metal evaporated tape and a metal powder tape in coming into close and uniform contact with the tapes may be kept good.

    摘要翻译： 用于磁记录装置的清洁介质包括非磁性基底和下涂层，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非磁性无机颗粒。 清洁介质还包括清洁层，其覆盖在下涂层上并且包含粘合剂和分散在粘合剂中的无机颗粒，所述无机颗粒至少含有铁磁颗粒。 清洗层的厚度在0.05μm〜1.0μm的范围内，清洗层的矩形比落在0.6〜0.98的范围内。 清洁介质的磁头几乎没有磨损，具有良好的清洁特性，并且能够将清洁的磁头的端部的形状实现为尖锐的形状，使得磁头与金属蒸发的相容性 胶带和与胶带紧密均匀接触的金属粉末胶带可能保持良好。

    Magnetic recording medium
    3.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5804283A

    公开(公告)日：1998-09-08

    申请号：US968860

    申请日：1997-11-05

    申请人： Hiroo Inaba ,  Masaki Suzuki ,  Naoto Abe ,  Toshiyuki Kitahara ,  Satoshi Matsubaguchi ,  Hiroaki Takano

    发明人： Hiroo Inaba ,  Masaki Suzuki ,  Naoto Abe ,  Toshiyuki Kitahara ,  Satoshi Matsubaguchi ,  Hiroaki Takano

    IPC分类号： G11B5/70 ,  G11B5/702 ,  G11B5/738 ,  G11B5/68

    CPC分类号： G11B5/70 ,  G11B5/7022 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24942 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/31609

    摘要： A magnetic recording medium prepared by a process which comprises providing a nonmagnetic layer comprising a nonmagnetic powder and a binder on a nonmagnetic support, and then providing one or more magnetic layers containing at least a ferromagnetic powder and a binder on the nonmagnetic layer while the nonmagnetic layer is wet, wherein the thickness of the magnetic layer is from 0.07 to 0.20 .mu.m, the magnetic layer comprises a resin curable by a polyisocyanate as a binder, the nonmagnetic layer is a layer cured by a polyisocyanate, and the ratio N/Fe in the magnetic layer is from 0.010 to 0.090 as determined by an X-ray photoelectric spectrophotometer; and a magnetic recording medium comprising a nonmagnetic support having thereon a lower nonmagnetic layer comprising a nonmagnetic powder and a binder, and further thereon a magnetic layer comprising at least a ferromagnetic metal powder and a binder, wherein the magnetic layer has a thickness of from 0.07 to 0.20 .mu.m, the magnetic layer has a maximum magnetic flux density Bm of from 3,700 to 6,000 G as measured in an external magnetic field of 10 kOe, the magnetic layer has a coercive force Hc of from 2,000 to 3,000 Oe, the magnetic layer has a center line surface roughness Ra of from 1.0 to 3.0 nm, and the nonmagnetic support has a center line surface roughness of from 0.5 to 7.0 nm on the side thereof to which the lower non layer is provided.

    摘要翻译： 一种磁记录介质，其制备方法包括在非磁性载体上提供包含非磁性粉末和粘合剂的非磁性层，然后在非磁性层上提供至少含有铁磁性粉末和粘结剂的一个或多个磁性层，而非磁性 层是湿的，其中磁性层的厚度为0.07至0.20μm，磁性层包含可通过多异氰酸酯作为粘合剂固化的树脂，非磁性层是由多异氰酸酯固化的层，N / Fe 在磁性层中，由X射线光电分光光度计测定为0.010〜0.090; 以及包含非磁性载体的磁记录介质，其上具有包含非磁性粉末和粘合剂的下部非磁性层，并且还包括至少包含强磁性金属粉末和粘结剂的磁性层，其中所述磁性层的厚度为0.07 至0.20μm，磁性层的磁通密度Bm为10kOe的外部磁场中测定的3,700〜6,000G，磁性层的矫顽力Hc为2000〜3000Oe，磁性层 具有1.0至3.0nm的中心线表面粗糙度Ra，并且非磁性载体在其设置较低非层的一侧具有0.5至7.0nm的中心线表面粗糙度。

    Magnetic recording medium
    5.
    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
    6.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US6074724A

    公开(公告)日：2000-06-13

    申请号：US918864

    申请日：1997-08-26

    申请人： Hiroo Inaba ,  Kiyomi Ejiri ,  Masaki Suzuki ,  Koji Naoe ,  Yuichiro Murayama ,  Hiroaki Takano

    发明人： Hiroo Inaba ,  Kiyomi Ejiri ,  Masaki Suzuki ,  Koji Naoe ,  Yuichiro Murayama ,  Hiroaki Takano

    IPC分类号： G11B5/702 ,  G11B5/706

    CPC分类号： B82Y15/00 ,  G11B5/7021 ,  G11B5/7022 ,  G11B5/70621 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

    摘要： A magnetic recording medium is disclosed, which comprises a support having thereon a magnetic layer comprising a binder and a ferromagnetic powder dispersed therein, wherein said binder comprises a polyurethane resin having at least one cyclic hydrocarbon group and at least one ether linkage, and said ferromagnetic powder is a ferromagnetic metallic powder which comprises Fe and has a mean major-axis length of from 0.05 to 0.19 .mu.m and a crystallite size of from 100 to 230 .ANG.; and further a magnetic recording medium is disclosed, comprising a support having thereon in succession an undercoat layer comprising a binder U and an inorganic powder dispersed therein and a magnetic layer comprising a binder M and a ferromagnetic powder dispersed therein, wherein at least either of the binder U or M comprises a polyurethane resin having at least one cyclic hydrocarbon group and at least one ether linkage and said ferromagnetic powder is a ferromagnetic metallic powder which comprises Fe and has a mean major-axis length of from 0.05 to 0.19 .mu.m and a crystallite size of from 100 to 230 .ANG..

    摘要翻译： 公开了一种磁记录介质，其包括其上具有包含粘合剂和分散在其中的铁磁粉末的磁性层的载体，其中所述粘合剂包含具有至少一个环状烃基和至少一个醚键的聚氨酯树脂，并且所述铁磁性 粉末是含铁的铁磁性金属粉末，其平均长轴长度为0.05至0.19μm，微晶尺寸为100至230安培; 并且还公开了一种磁记录介质，包括其上连续地具有包含粘合剂U和分散在其中的无机粉末的底涂层的支撑体和包含粘合剂M和分散在其中的铁磁性粉末的磁性层，其中， 粘合剂U或M包含具有至少一个环状烃基和至少一个醚键的聚氨酯树脂，并且所述铁磁性粉末是包含Fe并且具有0.05至0.19μm的平均长轴长度的铁磁性金属粉末，以及 微晶尺寸为100至230安培。

    Magnetic recording medium
    7.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5922454A

    公开(公告)日：1999-07-13

    申请号：US862262

    申请日：1997-05-23

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

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

    IPC分类号： G11B5/70 ,  G11B5/716 ,  G11B5/738 ,  G11B5/706

    CPC分类号： G11B5/716 ,  G11B5/70 ,  G11B5/738 ,  Y10T428/257 ,  Y10T428/258 ,  Y10T428/265

    摘要： A magnetic recording medium is disclosed, comprising a lower coating layer mainly comprising an inorganic powder and a binder provided on a non-magnetic support, and one or more magnetic layers comprising at least a ferromagnetic metal powder and a binder provided on the lower coating layer, wherein the thickness of said magnetic layers is from 0.05 .mu.m to 0.8 .mu.m and the magnetic particle incorporated in said magnetic layers comprises Fe as a main component, Co in an amount of from 10 atm-% to 40 atm-% and Y is an amount of from 1.5 atm-% to 10 atm-%, based on Fe.

    摘要翻译： 公开了一种磁记录介质，包括主要包含无机粉末和设置在非磁性载体上的粘合剂的下涂层和至少包含强磁性金属粉末和粘合剂的一个或多个磁性层，所述磁性层设置在下涂层 其中所述磁性层的厚度为0.05μm至0.8μm，并且所述磁性层中包含的磁性颗粒包含Fe作为主要成分，Co的量为10atm％至40atm％，Y为 以Fe为基准，其含量为1.5atm％至10atm％。

    Magnetic recording medium
    9.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5370932A

    公开(公告)日：1994-12-06

    申请号：US15293

    申请日：1993-02-08

    申请人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga ,  Keiji Mori

    发明人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga ,  Keiji Mori

    IPC分类号： G11B5/716 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/73 ,  B32B5/16 ,  G11B5/66

    CPC分类号： G11B5/716 ,  Y10T428/12931 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

    摘要： A magnetic recording medium excellent in electromagnetic properties is disclosed, which comprises a non-magnetic support and at least two magnetic layers formed thereon, each of which is mainly composed of a magnetic substance and a binder, in which a first magnetic layer (a lower layer) has a coercive force of 450 to 660 Oe, a residual magnetic flux density (Br) of 1,950 gausses or more and a thickness of 1.5 to 5 .mu.m, a second magnetic layer (an upper layer) has a coercive force of 700 to 900 Oe, a residual magnetic flux density of 1,500 gausses or more and a thickness of 1.5 to 3 .mu.m, the difference in coercive force between the first magnetic layer and the second magnetic layer is 150 to less than 300 Oe, the difference in residual magnetic flux density between the first magnetic layer and the second magnetic layer is within 600 gausses, and the total thickness of magnetic layers on the non-magnetic support is 3 to 7 .mu.m.

    摘要翻译： 公开了一种电磁特性优异的磁记录介质，其包括非磁性载体和形成在其上的至少两个磁性层，它们各自主要由磁性物质和粘合剂组成，其中第一磁性层 层）的矫顽力为450〜660Oe，剩余磁通密度（Br）为1,950高斯或以上，厚度为1.5〜5μm，第2磁性层（上层）的矫顽力为700 至900Oe，剩余磁通密度为1500高斯或更大，厚度为1.5至3μm，第一磁性层和第二磁性层之间的矫顽力差为150至小于300Oe， 第一磁性层和第二磁性层之间的剩余磁通密度在600高斯内，非磁性载体上的磁性层的总厚度为3〜7μm。

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

    公开(公告)号：US5175048A

    公开(公告)日：1992-12-29

    申请号：US765740

    申请日：1991-09-26

    申请人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga

    发明人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/702 ,  G11B5/716 ,  G11B5/842

    CPC分类号： G11B5/702 ,  G11B5/716 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

    摘要： A magnetic recording medium comprising a non-magnetic support having at least two magnetic layers formed thereon, the at least two magnetic layers being formed by providing, in sequence, a first magnetic layer containing first ferromagnetic powder and a first binder on a surface of the non-magnetic support and then providing a second magnetic layer containing a second binder and second ferromagnetic powder while the first layer is in a wet state, the first magnetic layer containing the first binder in an amount of 10 to 27 parts by weight based on 100 parts by weight of the first ferromagnetic powder, the second magnetic layer containing the second binder in an amount of 14 to 30 parts by weight based on 100 parts by weight of the second ferromagnetic powder, the amount of the first binder contained in the first magnetic layer being smaller than that of the second binder contained in the second magnetic layer with a difference therebetween being from 0.5 to 10 parts by weight, and a ratio (A/B) of a dry thickness (A) of the first magnetic layer to a dry thickness (B) of the second magnetic layer being from 0.5 to 3.2. The magnetic recording medium is excellent in electromagnetic conversion characteristics and running stability.

    摘要翻译： 一种磁记录介质，包括其上形成有至少两个磁性层的非磁性载体，所述至少两个磁性层通过依次提供含有第一铁磁性粉末和第一粘结剂的第一磁性层而形成 然后提供包含第二粘合剂和第二铁磁粉末的第二磁性层，同时第一层处于湿润状态，第一磁性层含有基于100的10至27重量份的第一粘合剂 所述第一铁磁粉末的重量份，含有所述第二粘合剂的所述第二磁性层的量为基于100重量份所述第二铁磁粉末为14〜30重量份，所述第一磁性体中含有的所述第一粘合剂的量 层比第二磁性层中包含的第二粘合剂的层小，其间的差值为0.5〜10重量份，并且ra 第一磁性层的干厚度（A）至第二磁性层的干厚度（B）的tio（A / B）为0.5至3.2。 磁记录介质具有优异的电磁转换特性和运行稳定性。