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1. 发明授权

US5455104A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5455104A
公开(公告)日：1995-10-03
申请号：US159367
申请日：1993-11-30
申请人： Nobuyuki Sekiguchi , Narito Goto , Katsuyuki Takeda , Ryosuke Isobe , Hideki Takahashi
发明人： Nobuyuki Sekiguchi , Narito Goto , Katsuyuki Takeda , Ryosuke Isobe , Hideki Takahashi
IPC分类号： G11B5/706 , G11B5/716 , G11B5/00
CPC分类号： G11B5/70615 , G11B5/716 , Y10S428/90 , Y10T428/24942 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： The present invention provides a magnetic recording medium comprising a support, lower magnetic layer comprising ferromagnetic powder and nonmagnetic powder dispersed in a binder and an upper magnetic layer which contains ferromagnetic powder dispersed in a binder. The lower layer has a coercive force of not less than 200 Oe, a saturation magnetic flux density in the range of 5-1000 gauss and non magnetic particles with a specific gravity of not less than 2.5. The ferromagnetic powder of the upper layer is a ferromagnetic metal powder containing Fe and Al, and the ratio of non magnetic powder to magnetic powder in the lower magnetic layer is from 50/50 to 99/1.
摘要翻译：本发明提供一种磁记录介质，其包括载体，包含分散在粘合剂中的铁磁性粉末和非磁性粉末的下磁性层和包含分散在粘合剂中的铁磁性粉末的上部磁性层。下层具有不小于200Oe的矫顽力，5-1000高斯范围内的饱和磁通密度和比重不小于2.5的非磁性颗粒。上层的铁磁性粉末是含有Fe和Al的铁磁性金属粉末，下层磁性层中的非磁性粉末与磁性粉末的比例为50/50〜99/1。

2. 发明授权

US5480713A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5480713A
公开(公告)日：1996-01-02
申请号：US115903
申请日：1993-09-01
申请人： Kunitsuna Sasaki , Narito Goto , Katsuyuki Takeda , Nobuyuki Sekiguchi , Hideki Takahashi , Ryosuki Isobe , Takahiro Mori
发明人： Kunitsuna Sasaki , Narito Goto , Katsuyuki Takeda , Nobuyuki Sekiguchi , Hideki Takahashi , Ryosuki Isobe , Takahiro Mori
IPC分类号： G11B5/70 , G11B5/716 , G11B5/738 , B32B5/16 , G11B5/66
CPC分类号： G11B5/738 , G11B5/70 , G11B5/716 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium having an improved output property over the wide range of wavelength, by controlling the magnetic reluctance and saturated magnetic flux density of the outermost layer and at least one layer other than the outermost layer, as specified in the claims, is disclosed. A magnetic matal powder contained in the outermost layer has an average major axis length of not more than 250 nm and a ratio of the average major axis length divided by an average X-ray measured particle size is less than 12.
摘要翻译：公开了一种磁记录介质，通过控制最外层的磁阻和饱和磁通密度以及除最外层之外的至少一个层，在宽波长范围内具有改进的输出特性。包含在最外层中的磁性粉末粉末的平均长轴长度不大于250nm，平均长轴长度除以平均X射线测量粒径的比小于12。

3. 发明授权

US5545462A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5545462A
公开(公告)日：1996-08-13
申请号：US272278
申请日：1994-07-08
申请人： Narito Goto , Masanori Isshiki , Kunitsuna Sasaki , Nobuyuki Sekiguchi , Katsuyuki Takeda , Hideki Takahashi
发明人： Narito Goto , Masanori Isshiki , Kunitsuna Sasaki , Nobuyuki Sekiguchi , Katsuyuki Takeda , Hideki Takahashi
IPC分类号： B32B7/02 , B32B7/12 , B32B27/04 , B32B27/18 , B32B33/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/06 , G11B5/706 , G11B5/716 , G11B5/73 , B32B3/10 , B32B5/16 , G11B5/66
CPC分类号： G11B5/70605 , G11B5/70673 , G11B5/70678 , G11B5/716 , Y10S428/90 , Y10T428/24355 , Y10T428/24942 , Y10T428/25 , Y10T428/265
摘要： Disclosed is a magnetic recording medium characterized in that plural magnetic layers are provided on a non-magnetic support, the uppermost layer of the magnetic layers contains a ferromagnetic metallic powder and/or a hexagonal system magnetic powder and a binder, at least one layer other than the uppermost layer contains Co-containing iron oxide and a binder, the film thickness of the uppermost layer is 0.5 .mu.m or less, and the surface of the uppermost layer of the magnetic layers has an R.sub.10z value of the magnetic layer defined below of 50 nm or less, by which electromagnetic conversion characteristics of a magnetic recording medium can be improved.
摘要翻译：公开了一种磁记录介质，其特征在于，多个磁性层设置在非磁性载体上，磁性层的最上层含有强磁性金属粉末和/或六方晶系磁性粉末和粘合剂，至少一层其它比最上层含有含Co的氧化铁和粘合剂，最上层的膜厚为0.5μm以下，磁性层的最上层的表面的磁性层的R10z值为 50nm以下，可以提高磁记录介质的电磁转换特性。

4. 发明授权

US5215833A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5215833A
公开(公告)日：1993-06-01
申请号：US718025
申请日：1991-06-20
申请人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
发明人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
IPC分类号： G11B5/70 , C09D5/23 , C09D7/12 , G11B5/71 , G11B5/716
CPC分类号： G11B5/71 , G11B5/716 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium is disclosed. The medium comprises a non-magnetic support and, provided thereon, plural magnetic layers comprising the uppermost magnetic layer having a thickness of 1.5 .mu.m or less and lower magnetic layers, said plural magnetic layers containing a ferromagnetic powder, a binder and a lubricant, wherein a dynamic friction coefficient of the uppermost layer against a metal pin is 0.25 or less under the condition of a temperature of 20.degree. C. and a relative humidity of 60%, and 0.20 or less under the condition of a temperature of 40.degree. C. and a relative humidity of 20%.
摘要翻译：公开了一种磁记录介质。所述介质包括非磁性支持体，并且在其上设置包括厚度为1.5μm以下的最上层的磁性层和下层磁性层的多个磁性层，所述多个磁性层含有铁磁粉末，粘合剂和润滑剂，其中在温度为20℃，相对湿度为60％，温度为40℃的条件下，最上层相对于金属销的动摩擦系数为0.25以下相对湿度为20％。

5. 发明授权

US5320901A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5320901A
公开(公告)日：1994-06-14
申请号：US716641
申请日：1991-06-17
申请人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
发明人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
IPC分类号： G11B5/706 , G11B5/716 , G11B5/735 , B32B5/16 , G11B5/66
CPC分类号： G11B5/70621 , G11B5/70615 , G11B5/716 , G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording tape of plural magnetic coating layers, which has excellent properties of both the electromagnetic conversion properties, particularly the chromatic output, and the corrosion resistance is disclosed. The top layer contains magnetic metal powder having the weight ratio of Al to Fe being 0.005 to 0.2, and the lower layer has the coercive force of not less than 650 Oe and not more than 1200 Oe.
摘要翻译：公开了具有优异的电磁转换性能，特别是彩色输出和耐腐蚀性的多个磁性涂层的磁记录带。顶层含有Al与Fe的重量比为0.005〜0.2的磁性金属粉末，下层的矫顽力不低于650Oe且不大于1200Oe。

6. 发明授权

US5149585A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5149585A
公开(公告)日：1992-09-22
申请号：US726571
申请日：1991-07-08
申请人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
发明人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/706 , G11B5/716 , G11B5/842
CPC分类号： G11B5/716 , G11B5/7022 , G11B5/842 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/265 , Y10T428/31609
摘要： A magnetic recording medium is disclosed, which is improved in electromagnetic conversion properties. The recording medium comprises a support, an uppermost magnetic mayer being provided on the support and one or more lower magnetic layers being provided between the support and the uppermost magnetic layer, in which the uppermost magnetic layer comprises a binder and a hexagonal magnetic powder and has a layer thickness of from 0.1 .mu.m to 1.0 .mu.m, and at least one of the lower magnetic layer comprises a binder having a anionic functional group and a magnetic powder, and has a coercive force of from 500 Oe to 1200 Oe, and the uppermost magnetic layer and the lower layer were formed on the support by wet-on-wet simultaneous multi-layer coating.
摘要翻译：公开了一种改进了电磁转换特性的磁记录介质。记录介质包括支撑体，最上面的磁性门设置在支撑体上，一个或多个下部磁性层设置在载体和最上面的磁性层之间，其中最上面的磁性层包括粘合剂和六方磁性粉末，并且具有层厚度为0.1μm至1.0μm，并且至少一个下磁性层包含具有阴离子官能团和磁性粉末的粘合剂，并且具有500Oe至1200Oe的矫顽力，并且通过湿 - 湿同时多层涂布在载体上形成最上层的磁性层和下层。

7. 发明授权

US5304416A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5304416A
公开(公告)日：1994-04-19
申请号：US995925
申请日：1992-12-21
申请人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
发明人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
IPC分类号： G11B5/706 , C09D5/23 , C09D7/12 , G11B5/716 , B32B5/16 , G11B5/66
CPC分类号： G11B5/716 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording tape with plural magnetic layers, having both the electromagnetic conversion properties, particularly the chromatic output, and the corrosion resistance is disclosed.The top layer contains a magnetic metal powder having 0.2-1.5% of water when it is mixed into a magnetic paint and a layer other than the top layer has the coercive force of 500 to 12000 Oe.
摘要翻译：公开了具有多个磁性层的磁记录带，具有电磁转换特性，特别是彩色输出和耐腐蚀性。顶层含有磁性金属粉末，当其混入磁性涂料中时，具有0.2-1.5％的水，除了顶层以外的层具有500至12000Oe的矫顽力。

8. 发明授权

US5324582A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5324582A
公开(公告)日：1994-06-28
申请号：US59883
申请日：1993-05-10
申请人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
发明人： Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
IPC分类号： G11B5/706 , G11B5/73 , G11B5/738 , B32B5/16 , G11B5/66
CPC分类号： G11B5/7305 , G11B5/70684 , G11B5/738 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium having magnetic layers on the non-magnetic support. The surface of the non-magnetic support has more than 200 protrusions per mm of the measuring length having more than 0.01 .mu.m height, and protrusions having the height more than 0.30 .mu.m height less than 500 per 400 mm of the measuring length. The protrusions are on the surface of the magnetic layers provided or opposit side of the support or the both sides. These protrusions reduce the surface friction of the medium, resulting the better electro-magnetic properties and the longer life for repeated usages.
摘要翻译：一种在非磁性载体上具有磁性层的磁记录介质。非磁性支撑体的表面具有超过200个突起，每毫米测量长度具有大于0.01μm的高度，并且具有大于0.30μm高度的高度的小于500 / 400mm测量长度的突起。突起部位于支撑体的两侧的磁性层的表面或相对侧。这些突起减少介质的表面摩擦，导致更好的电磁性能和更长的使用寿命。

9. 发明授权

US5252392A Magnetic recording medium comprising multiple magnetic layers with specified composition and properties 失效
标题翻译：包含具有特定组成和特性的多个磁性层的磁记录介质
公开(公告)号：US5252392A
公开(公告)日：1993-10-12
申请号：US903379
申请日：1992-06-24
申请人： Narito Goto , Nobuyuki Sekiguchi
发明人： Narito Goto , Nobuyuki Sekiguchi
IPC分类号： G11B5/716 , G11B5/00
CPC分类号： G11B5/716 , Y10S428/90 , Y10T428/265 , Y10T428/2982 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is disclosed. The medium comprises a support and provided thereon, a plurality of magnetic layers containing a magnetic powder and a binder, wherein an outermost magnetic layer of said magnetic layers comprises a ferromagnetic metal powder having an average major axis length of not more than 0.25 .mu.m and a crystallite size of not more than 200 .ANG. and carbon black having an average particle diameter of not less than 30 m.mu. in an amount of not more than 1% by weight, said outermost magnetic layer having a thickness of not more than 1 m.mu. and a surface roughness R.sub.10z of not more than 50 nm, and at least one magnetic layer other than said outermost layer comprises a cobalt-containing magnetic iron oxide powder having an average major axis length of not less than 0.25 .mu.m and a crystallite size of not less than 250 .ANG., said magnetic layer having a coercive force of from 500 to 1200 Oe.
摘要翻译：公开了一种磁记录介质。所述介质包括支撑体，其上设有包含磁性粉末和粘合剂的多个磁性层，其中所述磁性层的最外层磁性层包括平均长轴长度不大于0.25μm的铁磁性金属粉末和微晶尺寸不超过200，平均粒径不小于30μm的碳黑，其量不超过1wt％，所述最外磁层的厚度不大于1μm 表面粗糙度R10z为50nm以下，除了最外层以外的至少一层以上的磁性层包含平均长轴长度为0.25μm以上的含钴磁性氧化铁粉末，微晶尺寸为所述磁性层的矫顽力为500〜1200Oe，不小于250。

10. 发明授权

US5635294A Disk type magnetic recording medium and process of manufacturing the same 失效
标题翻译：盘式磁记录介质及其制造方法
公开(公告)号：US5635294A
公开(公告)日：1997-06-03
申请号：US59884
申请日：1993-05-10
申请人： Isamu Michihata , Hideki Murata , Katsuyuki Takeda , Nobuyuki Sekiguchi , Syozo Kikugawa
发明人： Isamu Michihata , Hideki Murata , Katsuyuki Takeda , Nobuyuki Sekiguchi , Syozo Kikugawa
IPC分类号： G11B5/702 , G11B5/708 , G11B5/714 , G11B5/66 , B05D5/12 , B32B5/16
CPC分类号： G11B5/7085 , G11B5/7021 , G11B5/7022 , G11B5/714 , Y10S428/90 , Y10T428/25 , Y10T428/254 , Y10T428/256 , Y10T428/257 , Y10T428/258
摘要： A magnetic recording medium and a manufacturing process thereof are disclosed. The medium comprises a magnetic layer containing a binder, chromium oxide having an average particle size within the range of 0.3 to 0.5 .mu.m and a metal magnetic powder, wherein the binder comprises a polyurethane resin having a polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM, --PO (OM), and --OPO(OM).sub.2 wherein M represents a hydrogen atom or an alkali metal.
摘要翻译：公开了一种磁记录介质及其制造方法。介质包括含有粘合剂的磁性层，平均粒度在0.3-0.5μm范围内的氧化铬和金属磁性粉末，其中粘合剂包括具有极性基团的聚氨酯树脂，所述极性基团选自 - SO 3 M，-OSO 3 M，-COOM，-PO（OM）和-OPO（OM）2，其中M表示氢原子或碱金属。

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