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1. 发明授权

US6124030A Cleaning medium for magnetic recording devices 失效
公开(公告)号：US6124030A
公开(公告)日：2000-09-26
申请号：US820106
申请日：1997-03-19
申请人： Masaki Suzuki , Hiroo Inaba
发明人： Masaki Suzuki , Hiroo Inaba
IPC分类号： G11B5/41 , G11B5/708
CPC分类号： G11B5/41 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： A cleaning medium for magnetic recording devices comprises a non-magnetic substrate, 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, and a cleaning layer, which is overlaid upon the lower coating layer and contains a binder and inorganic particles dispersed in the binder and at least containing ferromagnetic particles. An at least 50% by weight portion of the non-magnetic inorganic particles, which are contained in the lower coating layer, is constituted of granular inorganic particles, which have a mean particle diameter of at most 0.08 .mu.m, or acicular inorganic particles, which have a mean longer axis length falling within the range of 0.05 .mu.m to 0.3 .mu.m and an acicular ratio falling within the range of 3 to 20. The cleaning medium removes dirt from magnetic heads with high cleaning power, such that the wear of the magnetic heads may be small and no scratch may occur on the cleaned magnetic heads.

2. 发明授权

US5804283A Magnetic recording medium 失效
标题翻译：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。

3. 发明授权

US5645917A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5645917A
公开(公告)日：1997-07-08
申请号：US873201
申请日：1992-04-24
申请人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
发明人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
IPC分类号： G11B5/66 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , G11B5/848
CPC分类号： G11B5/848 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , Y10S428/90 , Y10T428/12472 , Y10T428/24355 , Y10T428/24942 , Y10T428/25 , Y10T428/253 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/265 , Y10T428/269 , Y10T428/31551 , Y10T428/31721 , Y10T428/31855
摘要： A magnetic recording medium is disclosed comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上设置有至少一个包含分散有非磁性粉末的粘合剂的下部非磁性层和包含分散有铁磁性粉末的粘合剂的上层磁性层，被涂覆在所述下部非磁性层上，而下部非磁性层是湿的，其中上部磁性层的平均干燥厚度（d）不大于1.0μm，平均厚度变化（DELTA d）在上磁层与下层非磁性层之间的界面不大于d / 2。磁记录介质表现出优异的电磁特性，运行性能和耐久性。

4. 发明授权

US5455112A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5455112A
公开(公告)日：1995-10-03
申请号：US10846
申请日：1993-01-29
申请人： Hiroo Inaba , Kiyomi Ejiri
发明人： Hiroo Inaba , Kiyomi Ejiri
IPC分类号： C09C1/48 , C09D5/23 , C09D7/12 , G11B5/73 , G11B5/733 , G11B5/738 , B32B5/16 , G11B5/66
CPC分类号： G11B5/738 , G11B5/733 , Y10S428/90 , Y10S428/928 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording medium produced by providing a lower non-magnetic layer comprising a non-magnetic powder dispersed in a binder on a non-magnetic support followed by providing, while the lower non-magnetic layer is still wet, an upper magnetic layer comprising a ferromagnetic powder dispersed in a binder on the lower non-magnetic layer, wherein a mean thickness of the upper magnetic layer is 1.0 .mu.m or less and the non-magnetic powder in the lower non-magnetic layer comprises (A) a granular inorganic powder having a mean particle size of from 0.01 to 0.08 .mu.m, (B) a carbon black powder having a mean particle size of from 0.01 to 0.04 .mu.m and (C) a powder component having a larger mean particle size than the mean particle size of each of powders (A) and (B). The magnetic recording medium has good electromagnetic characteristics and has excellent running durability with little edge damage after repeated running.
摘要翻译：提供一种磁记录介质，其通过在非磁性载体上提供分散在粘合剂中的非磁性粉末的下部非磁性层，然后在下部非磁性层仍然是湿的同时提供包括分散在下层非磁性层上的粘合剂中的铁磁性粉末，其中上磁性层的平均厚度为1.0μm以下，下部非磁性层中的非磁性粉末包含（A）粒状无机粉末平均粒径为0.01〜0.08μm，（B）平均粒径为0.01〜0.04μm的炭黑粉末，（C）平均粒径大于平均粒径的粉末成分的粉末（A）和（B）。磁记录介质具有良好的电磁特性，具有优异的运行耐久性，反复运行后边缘损伤小。

5. 发明授权

US5447782A Magnetic recording medium having a specified thickness relationship between a nonmagnetic underlayer and overcoated magnetic layers 失效
标题翻译：在非磁性底层和外涂磁性层之间具有特定厚度关系的磁记录介质
公开(公告)号：US5447782A
公开(公告)日：1995-09-05
申请号：US143063
申请日：1993-10-29
申请人： Hiroo Inaba , Kiyomi Ejiri , Koji Naoe
发明人： Hiroo Inaba , Kiyomi Ejiri , Koji Naoe
IPC分类号： C09D5/23 , G11B5/70 , G11B5/716 , G11B5/73 , G11B5/738 , G11B5/00
CPC分类号： G11B5/70 , G11B5/716 , G11B5/738 , Y10S428/90 , Y10T428/24942 , Y10T428/2495 , Y10T428/24967 , Y10T428/256 , Y10T428/257
摘要： Disclosed is a magnetic recording medium, comprising (a) a nonmagnetic flexible support, (b) a lower nonmagnetic layer provided on the support and comprising a nonmagnetic particle and a binder, and (c) a magnetic layer provided on the nonmagnetic layer and comprising a ferromagnetic particle and a binder, wherein (i) the magnetic layer comprises at least two layers comprising a lower magnetic layer provided on the lower nonmagnetic layer and an upper magnetic layer provided on the lower magnetic layer, (ii) a ratio of the lower nonmagnetic layer thickness to the total magnetic layer thickness of the lower magnetic layer and the upper magnetic layer is from 1 to 50, (iii) the upper magnetic layer and the lower magnetic layer have a difference in coercive force of at least 80 Oe, and (iv) the lower nonmagnetic layer and at least the lower magnetic layer are formed by a wet-on-wet coating method.
摘要翻译：公开了一种磁记录介质，包括（a）非磁性柔性支撑体，（b）设置在载体上的下部非磁性层，并且包括非磁性颗粒和粘合剂，和（c）设置在非磁性层上的磁性层，铁磁颗粒和粘合剂，其中（i）磁性层包括至少两层，包括设置在下部非磁性层上的下部磁性层和设置在下部磁性层上的上部磁性层，（ii）下部磁性层的比例非磁性层厚度与下部磁性层和上部磁性层的总磁性层厚度的比值为1〜50，（iii）上部磁性层和下部磁性层的矫顽力差异至少为80 Oe，（iv）下部非磁性层和至少下部磁性层通过湿式湿式涂覆法形成。

6. 发明授权

US5385779A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5385779A
公开(公告)日：1995-01-31
申请号：US102834
申请日：1993-08-06
申请人： Toshihiko Miura , Hiroo Inaba
发明人： Toshihiko Miura , Hiroo Inaba
IPC分类号： G11B5/70 , C09D5/23 , G11B5/708 , G11B5/716 , G11B5/73 , G11B5/738 , G11B5/84 , G11B5/00
CPC分类号： G11B5/7085 , G11B5/738 , Y10S428/90 , Y10T428/25 , Y10T428/256
摘要： A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a lower nonmagnetic layer comprising nonmagnetic particles dispersed in a binder and further having on the lower layer an upper magnetic layer comprising ferromagnetic metal particles comprising alpha iron crystals dispersed in a binder, wherein said upper magnetic layer has diffraction dots attributable to the ferromagnetic metal particles present on the magnetic layer surface when analyzed by reflection high-energy electron diffraction, the number of said diffraction dots is from 5 to 15 when counted in a 100.degree. range on a circular arc of diffraction dots caused by diffraction on a (211) plane of said ferromagnetic metal particles present on the magnetic layer surface.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上具有包含分散在粘合剂中的非磁性颗粒的下非磁性层，并且还在下层上具有包含分散在粘合剂中的包含α铁分子的铁磁性金属颗粒的上磁性层，其中所述当通过反射高能电子衍射分析时，上磁性层具有归因于存在于磁性层表面上的强磁性金属颗粒的衍射点，当在圆弧上在100度范围内计数时，所述衍射点的数量为5至15 由在磁性层表面上存在的所述强磁性金属颗粒的（211）面衍射引起的衍射点。

7. 发明授权

US5370932A Magnetic recording medium 失效
标题翻译：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。

8. 发明授权

US5034271A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5034271A
公开(公告)日：1991-07-23
申请号：US184539
申请日：1988-04-21
申请人： Takahito Miyoshi , Hiroo Inaba , Kazuko Hanai , Yasuyuki Yamada
发明人： Takahito Miyoshi , Hiroo Inaba , Kazuko Hanai , Yasuyuki Yamada
IPC分类号： G11B5/702 , G11B5/71
CPC分类号： G11B5/7022 , G11B5/71 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/30 , Y10T428/31609
摘要： An improved magnetic recording medium comprises a nonmagnetic support and a magnetic recording layer which comprises a ferromagnetic powder, a lubricant and an abrasive dispersed in a binder comprising a specific polyurethane resin and a specific vinyl chloride copolymer at a ratio (polyurethane resin:vinyl chloride copolymer) in the range of 15:85 to 90:10. The polyurethane resin has a polar group such as --COOM, --SO.sub.3 M, --OSO.sub.3 M and --PO(OM').sub.2, wherein M is hydrogen or an alkali metal atom, and M' is hydrogen, an alkali metal atom or a lower hydrocarbon group, one polar group being contained per 53,000 to 100,000 of the number-average molecular weight of the resin, and the vinyl chloride copolymer has one of the above-mentioned polar group, one polar group unit being contained per 10,000 to 100,000 of the number-average molecular weight of the copolymer. The recording layer contains a fatty acid ester lubricant having a low melting point, a carbon black having an average particle size of 90-150 .mu.m, and/or a .alpha.-alumina having a small average particle size.
摘要翻译：改进的磁记录介质包括非磁性载体和磁记录层，其包含分散在粘合剂中的铁磁性粉末，润滑剂和磨料，所述粘合剂包含特定聚氨酯树脂和特定氯乙烯共聚物（聚氨酯树脂：氯乙烯共聚物）在15:85至90:10的范围内。聚氨酯树脂具有极性基团，例如-COOM，-SO 3 M，-OSO 3 M和-PO（OM'）2，其中M是氢或碱金属原子，M'是氢，碱金属原子或低级烃基，树脂的数均分子量为53,000至100,000，包含一个极性基团，并且氯乙烯共聚物具有上述极性基团之一，每10,000至100,000个数中包含一个极性基团单元 - 共聚物的平均分子量。记录层含有低熔点的脂肪酸酯润滑剂，平均粒径为90-150μm的炭黑和/或平均粒度小的α-氧化铝。

9. 发明授权

US4861674A Magnetic recording medium 失效
标题翻译：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。

10. 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。

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