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51. 发明授权

US5013602A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5013602A
公开(公告)日：1991-05-07
申请号：US247211
申请日：1988-09-21
申请人： Nobuo Yamazaki , Hiroo Inaba , Kouichi Masaki
发明人： Nobuo Yamazaki , Hiroo Inaba , Kouichi Masaki
IPC分类号： C09D5/23 , G11B5/702 , G11B5/708
CPC分类号： G11B5/7023 , G11B5/702 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium is described, comprising a nonmagnetic support having thereon a single magnetic layer or plural magnetic layers containing ferromagnetic particles dispersed in a binder, wherein said ferromagnetic particles are ferromagnetic particles of the magnetic iron oxide type having an adsorption amount of stearic acid of from 3.times.10.sup.-6 to 6.times.10.sup.-6 mol/m.sup.2 per a surface area thereof; said binder contains at least one polymer having at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --OPO(OM').sub.2, --COOM and --PO(OM').sub.2, in which M represents Na, Li, K, a hydrogen atom, NR.sub.4 or NHR.sub.3, M' represents Na, Li, K, a hydrogen atom, NR.sub.4, NHR.sub.3 or an alkyl group, and R.sub.3 and R.sub.4 represent a lower alkyl group; and said magnetic layer further contains at least one fatty acid.
摘要翻译：描述了一种磁记录介质，其包括其上具有单个磁性层的非磁性载体或包含分散在粘合剂中的铁磁性颗粒的多个磁性层，其中所述铁磁性颗粒是磁性氧化铁类型的铁磁性颗粒，其具有每个表面积为3×10 -6至6×10 -6 mol / m 2; 所述粘合剂含有至少一种具有选自-SO 3 M，-OSO 3 M，-OPO（OM'）2，-COOM和-PO（OM'）2中的至少一个极性基团的聚合物，其中M表示Na， Li，K，氢原子，NR4或NHR3，M'表示Na，Li，K，氢原子，NR4，NHR3或烷基，R3和R4表示低级烷基; 并且所述磁性层还含有至少一种脂肪酸。

52. 发明授权

US06395400B1 Magnetic recording medium 失效
标题翻译：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。

53. 发明授权

US5922454A Magnetic recording medium 失效
标题翻译：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％。

54. 发明授权

US5175048A Magnetic recording medium 失效
标题翻译：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。

55. 发明授权

US5139865A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5139865A
公开(公告)日：1992-08-18
申请号：US557840
申请日：1990-07-26
申请人： Hiroo Inaba , Kazuaki Taga , Toshihiko Miura
发明人： Hiroo Inaba , Kazuaki Taga , Toshihiko Miura
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/716 , G11B5/73
CPC分类号： G11B5/70 , G11B5/70621 , G11B5/716 , G11B5/738 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium comprising a non-magnetic support having thereon a plurality of magnetic layers each comprising a ferromagnetic powder dispersed in a binder, wherein the layer located within a thickness of 0.5 .mu.m from an uppermost surface of said plurality of magnetic layers and a layer located within a thickness of 0.5 .mu.m above the adjacent non-magnetic support have a higher packing density of ferromagnetic powder than an interlayer interposed therebetween. In a preferred embodiment, the interlayer consists of two layers and there are provided on the non-magnetic support a 1st magnetic layer, a 2nd magnetic layer, a 3rd magnetic layer and a 4th magnetic layer in this order from the non-magnetic support; the sum of the thickness of said 3rd magnetic layer and said 4th magnetic layer being not more than 3.5 .mu.m.
摘要翻译：一种磁记录介质，包括其上具有多个磁性层的非磁性载体，每个磁性层各自包含分散在粘合剂中的铁磁性粉末，其中位于距所述多个磁性层的最上表面0.5μm的厚度的层和位于相邻非磁性支撑体上方0.5μm厚度的层具有比夹在其间的夹层更高的铁磁性粉末的堆积密度。在优选实施例中，中间层由两层组成，非磁性载体上依次设有第一磁性层，第二磁性层，第三磁性层和第四磁性层; 所述第三磁性层和所述第四磁性层的厚度之和不大于3.5μm。

56. 发明授权

US5073406A Method of producing a magnetic recording medium 失效
标题翻译：制造磁记录介质的方法
公开(公告)号：US5073406A
公开(公告)日：1991-12-17
申请号：US682767
申请日：1991-04-09
申请人： Masatoshi Takahashi , Hiroo Inaba , Kazuaki Taga
发明人： Masatoshi Takahashi , Hiroo Inaba , Kazuaki Taga
IPC分类号： G11B5/716 , G11B5/842
CPC分类号： G11B5/716 , G11B5/842
摘要： A method of producing a magnetic recording medium comprises the steps of kneading and dispersing ferromagnetic powder, binder and non-ferromagnetic powder to obtain magnetic coating solutions, and applying a plurality of the magnetic coating solutions on a non-ferromagnetic substrate to form a plurality of magnetic layers on the substrate. In the kneading and dispersing step, a magnetic coating composition containing a ferromagnetic powder and a solvent of 15 to 30 wt % of the ferromagnetic powder is kneaded by a two-shaft continuous kneading and mixing machine and then dispersed by a pin type sand grinder to obtain a first magnetic solution. Another magnetic coating composition containing a ferromagnetic powder and a solvent of 30 to 50 wt % of the ferromagnetic powder is kneaded by a double-arm open kneader and then dispersed by a pin type sand grinder, and finally dispersed by a disk type sand grinder to obtain a second magnetic coating solution. In the magnetic solution applying step, the first magnetic coating solution is at first applied on said substrate and then the second magnetic coating solution is applied thereon.
摘要翻译：一种制造磁记录介质的方法包括以下步骤：将铁磁性粉末，粘合剂和非铁磁性粉末混合和分散以获得磁性涂层溶液，并将多个磁性涂覆溶液施加在非铁磁性基底上以形成多个基底上的磁性层。在捏合分散工序中，将含有铁磁性粉末和15〜30重量％的铁磁粉末的溶剂的磁性涂料组合物通过双轴连续捏合混合机进行混炼，然后用针式砂磨机分散获得第一磁性溶液。含有铁磁性粉末和铁磁性粉末的含量为30〜50重量％的溶剂的磁性涂料组合物用双臂开口捏合机捏合，然后用针式砂磨机分散，最后用盘式砂磨机分散获得第二磁性涂层溶液。在磁性溶液涂布步骤中，首先将第一磁性涂布溶液涂布在所述基材上，然后将第二磁性涂布液涂布在其上。

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