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％。

公开(公告)号：US5489466A

公开(公告)日：1996-02-06

申请号：US272871

申请日：1994-07-08

申请人： Hiroo Inaba ,  Kiyoma Ejiri ,  Kouichi Masaki ,  Takeshi Harasawa

发明人： Hiroo Inaba ,  Kiyoma Ejiri ,  Kouichi Masaki ,  Takeshi Harasawa

IPC分类号： G11B5/70 ,  G11B5/714 ,  G11B5/738 ,  G11B5/00

CPC分类号： B82Y15/00 ,  G11B5/70 ,  G11B5/714 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/2993 ,  Y10T428/2995

摘要： Disclosed is a magnetic recording medium comprising a nonmagnetic support, a lower nonmagnetic layer and an upper magnetic layer. The lower nonmagnetic layer is coated on the support, comprises an inorganic nonmagnetic powder dispersed in a binder, and is surface-coated with an inorganic oxide. The upper magnetic layer has a dry thickness of 1.0 micrometers or less and comprises a dispersion of a ferromagnetic powder in a binder. The upper magnetic layer is coated onto the lower nonmagnetic layer.

摘要翻译： 公开了包括非磁性载体，下部非磁性层和上部磁性层的磁记录介质。 下部非磁性层涂覆在载体上，包含分散在粘合剂中的无机非磁性粉末，并用无机氧化物进行表面涂覆。 上磁性层的干燥厚度为1.0微米或更小，并且包含铁磁性粉末在粘合剂中的分散体。 上磁性层被涂覆在下部非磁性层上。

公开(公告)号：US5126202A

公开(公告)日：1992-06-30

申请号：US190846

申请日：1988-05-06

申请人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

发明人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/714

CPC分类号： G11B5/7023 ,  G11B5/708 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/2982 ,  Y10T428/31609

摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises carbon black having an average particle diameter of from about 20 to 120 m.mu.; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sup.4 .sym. R.sub.3, or N.sup..sym. HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.

摘要翻译： 一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约20至120μm的炭黑; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除所述氯乙烯树脂以外的至少一种树脂，其含有-SO 3 M，-OSO 2 M，-COOM， 其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N4（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。

公开(公告)号：US5112680A

公开(公告)日：1992-05-12

申请号：US185214

申请日：1988-04-25

申请人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

发明人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/714

CPC分类号： G11B5/7085 ,  G11B5/7023 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/30

摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises Al.sub.2 O.sub.3 particles having an average particle diameter of from about 0.1 to 0.5 .mu.m; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.

摘要翻译： 一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约0.1至0.5μm的Al 2 O 3颗粒; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除了含有-SO 3 M，-OSO 2 M，-COOM和 其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。

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。

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。

公开(公告)号：USRE36271E

公开(公告)日：1999-08-17

申请号：US903353

申请日：1992-06-24

申请人： Hiroo Inaba ,  Shinji Saito ,  Hiroshi Ogawa

发明人： Hiroo Inaba ,  Shinji Saito ,  Hiroshi Ogawa

IPC分类号： G11B5/702 ,  C09D5/23 ,  G11B5/708 ,  G11B5/716 ,  G11B23/00

CPC分类号： G11B5/708 ,  G11B5/716 ,  Y10S428/90 ,  Y10T428/24967 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/30

摘要： A magnetic recording medium comprises a non-magnetic support having provided thereon a lower magnetic layer having a thickness of 2.5 .mu.m or higher and an upper magnetic layer having a thickness of 2 .mu.m or lower in this order, wherein both the upper and lower magnetic layers contain ferromagnetic particles, and the lower magnetic layer contains carbon black having an average primary particle diameter of less than 20 .mu.m in the amount of from 1.0 to 20 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the lower magnetic layer, and the upper magnetic layer contains carbon black having an average primary particle diameter of at least 40 .mu.m but less than 80 .mu.m in an amount of from 0.1 to 10.0 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the upper magnetic layer, but less than the amount of carbon black used in the lower magnetic layer.

摘要翻译： 磁记录介质包括具有厚度为2.5μm或更高的下磁性层和厚度为2μm或更小的上磁层的非磁性载体，其中上和下两个 磁性层含有铁磁性粒子，下部磁性层含有平均一次粒径小于20μm的碳黑，相对于100重量份以下的铁磁性粒子为100重量份，1.0〜20重量份 磁性层，上部磁性层含有平均一次粒径为40μm以上且小于80μm的碳黑，相对于100重量份含有的铁磁性粒子，为0.1〜10.0重量份 在上磁性层中，但低于下磁性层中使用的炭黑的量。

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％。

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。

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。