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1. 发明授权

US5436055A Magnetic recording medium and magnetic tape cassette mounted with the magnetic recording medium 失效
标题翻译：磁记录介质和安装有磁记录介质的磁带盒
公开(公告)号：US5436055A
公开(公告)日：1995-07-25
申请号：US37396
申请日：1993-03-26
申请人： Takeshi Kakuta , Shinji Saito , Kazuo Kato , Noburo Hibino
发明人： Takeshi Kakuta , Shinji Saito , Kazuo Kato , Noburo Hibino
IPC分类号： G11B23/087 , C09D5/23 , C09D7/12 , G11B5/73 , G11B5/733 , G11B5/738 , B32B3/10 , G11B5/66 , G11B15/00
CPC分类号： G11B5/738 , G11B5/733 , Y10T428/24355 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259
摘要： A magnetic recording medium and a magnetic tape cassette are disclosed, comprising a non-magnetic support having formed on one surface only thereof at least two layers including a lower layer and an upper magnetic layer formed thereon, wherein the surface electric resistance (Rs) of the surface of the magnetic layer of said magnetic recording medium is 10.sup.9 .OMEGA./sq or less, the non-magnetic support contains at least three different kinds of particles which vary from each other in at least one property of mean particle diameter and Mohs' hardness, and the opposite surface of the magnetic recording medium comprises the rear surface of the nonmagnetic support having at least 1,000 projections having a height of from 200 nm to 400 nm per 0.1 mm.sup.2, but with the provisos that not more than 1,000 projections are present having a height of from 400 nm to 700 nm per 0.1 mm.sup.2 and not more than 50 projections are present having a height of 700 nm or more per 0.1 mm.sup.2.
摘要翻译：公开了一种磁记录介质和磁带盒，其包括非磁性载体，其仅在一个表面上形成有至少两层，包括形成在其上的下层和上磁性层，其中，表面电阻（Rs）为所述磁记录介质的磁性层的表面为109欧姆/平方厘米或更小，非磁性载体包含至少三种不同的颗粒，它们在平均粒径和莫氏硬度的至少一个性质中彼此不同磁记录介质的相对表面包括具有至少1,000个突起的非磁性载体的后表面，其具有每0.1mm 2的200nm至400nm的高度，但条件是存在不超过1,000个突起，存在每0.1mm 2 400nm至700nm以上且不超过50个突起的高度，每0.1mm 2具有700nm以上的高度。

2. 发明授权

US5415933A Magnetic recording medium containing a biaxially oriented multilayer support 失效
标题翻译：含有双轴取向多层载体的磁记录介质
公开(公告)号：US5415933A
公开(公告)日：1995-05-16
申请号：US107114
申请日：1993-08-17
申请人： Tadashi Ishiguro , Takeshi Kakuta , Kazuo Kato , Noburo Hibino
发明人： Tadashi Ishiguro , Takeshi Kakuta , Kazuo Kato , Noburo Hibino
IPC分类号： G11B5/708 , C09D5/23 , G11B5/716 , G11B5/73 , G11B5/733 , G11B5/738 , B32B33/00 , G11B5/66 , G11B5/70
CPC分类号： G11B5/738 , G11B5/716 , Y10S428/91 , Y10T428/265 , Y10T428/2982
摘要： A magnetic recording medium is disclosed, which is formed by providing on a non-magnetic support, a lower layer comprising at least one of a ferromagnetic powder and a non-magnetic powder dispersed in a binder, and providing on the lower layer while the lower layer is in a wet condition, an upper magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein the upper magnetic layer has a dry thickness of 1.0 .mu.m or less, and the non-magnetic support is a multi-layer structural support comprising at least an uppermost support layer and a lowermost support layer, wherein the uppermost support layer is coated with the lower non-magnetic or magnetic layer, each of the uppermost layer and the lowermost layer comprises a biaxially oriented film comprising a thermoplastic resin containing filler particles, and the uppermost support layer has a center line average surface roughness Ra in the range defined by the following formula:Ra(Cut off: 0.25 mm)-Ra(Cut off: 0.08 mm).ltoreq.10 nm.
摘要翻译：公开了一种磁记录介质，其通过在非磁性载体上提供包含分散在粘合剂中的铁磁粉末和非磁性粉末中的至少一种的下层而形成，并且在下层提供下层上层磁性层包含分散在粘合剂中的铁磁性粉末，其中上磁性层的干燥厚度为1.0μm以下，非磁性载体为多层结构载体，其包含：至少最上面的支撑层和最下面的支撑层，其中最上面的支撑层涂覆有较低的非磁性或磁性层，最上层和最下层都包括双轴取向膜，其包含含有填料颗粒的热塑性树脂，最上面的支撑层的中心线平均表面粗糙度Ra在由下式限定的范围内：Ra（截止：0.25mm）-Ra（截止：0.08mm）

3. 发明授权

US4997696A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4997696A
公开(公告)日：1991-03-05
申请号：US560633
申请日：1990-07-31
申请人： Ko Kamada , Takeshi Kakuta , Noburo Hibino
发明人： Ko Kamada , Takeshi Kakuta , Noburo Hibino
IPC分类号： C09D5/23 , C09D7/12 , G11B5/706 , G11B5/73
CPC分类号： G11B5/70642 , G11B5/7305 , Y10S428/90 , Y10T428/24355 , Y10T428/257
摘要： A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer composed of ferromagnetic iron oxide powder dispersed in a binder, wherein a value of P.sub.10 of optical interference type three dimensional surface roughness on the magnetic layer side of the non-magnetic support is in the range of 15 to 35 nm, Rmax/P.sub.10 is not higher than 2.8 and P.sub.10 of the opposite side to the magnetic layer side is also in the range of 15 to 35 nm, wherein P.sub.10 (nm) represents the difference between an average height of the protrusions of 10 apices extracted in order of greatest height within an area 250 .mu.m square and an average height of all apices within the same 250 .mu.m square area and Rmax (nm) represents the difference between an uppermost height and a lowermost depth within the 250 .mu.m square area.
摘要翻译：一种磁记录介质，其特征在于，具有非磁性载体，其上分散有由铁磁性氧化铁粉末构成的磁性层，其中，所述非磁性载体的磁性层侧的光学干涉型三维表面粗糙度的P10值在15〜35nm的范围内，Rmax / P10不高于2.8，与磁性层一侧的相反侧的P10也在15〜35nm的范围内，其中P10（nm）表示在250平方米的面积内以最大高度排列的10个顶点的突起的平均高度和相同的250μm平方面积内的所有顶点的平均高度，Rmax（nm）表示最高高度和最低深度在250平方米的面积内。

4. 发明授权

US5631062A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5631062A
公开(公告)日：1997-05-20
申请号：US248246
申请日：1994-05-24
申请人： Kenichi Masuyama , Hiroaki Takano , Kazuo Kato , Kazuko Hanai , Noburo Hibino
发明人： Kenichi Masuyama , Hiroaki Takano , Kazuo Kato , Kazuko Hanai , Noburo Hibino
IPC分类号： C09D5/23 , C09D7/12 , G11B5/70 , G11B5/73 , G11B5/738 , G11B5/66
CPC分类号： G11B5/738 , G11B5/70 , Y10S428/90 , Y10T428/24355 , Y10T428/24372
摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic layer, wherein the magnetic layer is provided on one surface of the nonmagnetic support, comprises a ferromagnetic particle, and has a surface roughness of from 2 to 10 nm; the nonmagnetic support has plural layers; at least one layer of the plural layers comprises an antistatic agent; and the nonmagnetic support has a surface roughness of from 5 to 30 nm on the opposite surface to the surface on which the magnetic layer is provided.
摘要翻译：包括非磁性载体和磁性层的磁记录介质，其中所述磁性层设置在所述非磁性载体的一个表面上，包括铁磁颗粒，并且具有2至10nm的表面粗糙度; 非磁性载体具有多层; 至少一层多层包括抗静电剂; 并且非磁性载体在与设置有磁性层的表面相反的表面上具有5至30nm的表面粗糙度。

5. 发明授权

US4743487A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4743487A
公开(公告)日：1988-05-10
申请号：US816872
申请日：1986-01-07
申请人： Shinji Saito , Chiaki Mizuno , Hiroshi Ogawa , Noburo Hibino , Yasuo Tamai
发明人： Shinji Saito , Chiaki Mizuno , Hiroshi Ogawa , Noburo Hibino , Yasuo Tamai
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , C09D167/00 , C09D169/00 , C09D177/00 , G11B5/70 , G11B5/73 , G11B5/704
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/24355
摘要： A magnetic recording medium such as an audio cassette tape or a video cassette tape comprising a flexible nonmagnetic support and a magnetic recording layer which contains a ferromagnetic cobalt-containing iron oxide, in which the nonmagnetic support has a surface of a center line average height in the range of 0.01 to 0.1 .mu.m on both sides and the magnetic recording medium has a heat shrinkage ratio of not higher than 1%, the heat shrinkage ratio being determined after allowing to stand at 110.degree. C. for 4 hours.
摘要翻译：一种诸如音频盒式磁带或盒式磁带的磁记录介质，包括柔性非磁性载体和含有铁磁性钴的氧化铁的磁记录层，其中非磁性载体具有中心线平均高度的表面两侧的0.01〜0.1μm的范围和磁记录介质的热收缩率不高于1％，热收缩率是在110℃下放置4小时后测定的。

6. 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。

7. 发明授权

US4388368A Magnetic recording media 失效
标题翻译：磁记录媒体
公开(公告)号：US4388368A
公开(公告)日：1983-06-14
申请号：US286840
申请日：1981-07-27
申请人： Noburo Hibino , Goro Akashi
发明人： Noburo Hibino , Goro Akashi
IPC分类号： B32B17/10 , B32B33/00 , C08L67/02 , G11B5/73 , G11B5/738 , H01F10/00
CPC分类号： G11B5/738 , Y10S428/90 , Y10T428/265 , Y10T428/31518 , Y10T428/31616
摘要： The increased occurrence of jitter, wow, flutter, folding, and tendency to crumple of a magnetic recording medium when reducing the thickness of the support of the magnetic recording medium is effectively prevented by forming a thin glass layer on the base film for the magnetic recording medium.
摘要翻译：通过在用于磁记录的基底膜上形成薄的玻璃层，可以有效地防止在减小磁记录介质的支持体的厚度时抖动，哇音，抖动，折叠和磁记录介质折叠的增加的发生中。

8. 发明授权

US4411958A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4411958A
公开(公告)日：1983-10-25
申请号：US314342
申请日：1981-10-23
申请人： Masami Sato , Yasutoshi Okuzawa , Noburo Hibino
发明人： Masami Sato , Yasutoshi Okuzawa , Noburo Hibino
IPC分类号： C09D5/23 , C09D7/12 , G11B5/70 , G11B5/73 , H01F10/00
CPC分类号： G11B5/70 , Y10S428/90 , Y10T428/31678
摘要： A magnetic recording medium comprising a base and a magnetic layer formed thereon is disclosed. The coefficient of friction (.mu..sub.B) of the surface opposite to the magnetic layer in transversal direction against the axial direction of loading post is under the straight line represented by the formula: .mu..sub.B =0.1S.sub.TD -0.05 (wherein S.sub.TD is the stiffness of the medium in transversal direction and 0.5
摘要翻译：公开了一种包括基底和形成在其上的磁性层的磁记录介质。与负载柱的轴向方向相反的与磁性层相反的表面的摩擦系数（μB）在由下式表示的直线下：μB= 0.1STD-0.05（其中STD为横向培养基，0.5

9. 发明授权

US4673590A Process for preparing a magnetic recording medium 失效
标题翻译：磁记录介质的制备方法
公开(公告)号：US4673590A
公开(公告)日：1987-06-16
申请号：US833680
申请日：1986-02-25
申请人： Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
发明人： Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
IPC分类号： G11B5/73 , G11B5/84 , H01F10/02
CPC分类号： G11B5/84 , G11B5/7305
摘要： A process for preparing a magnetic recording medium is disclosed, which comprises (1) subjecting a surface of a non-magnetic support having a surface roughness of not less than 0.01 .mu.m to an abrasion treatment or a calendering treatment, (2) coating a layer containing a compound polymerizable by radiation exposure on the surface of non-magnetic support, (3) exposing the layer to radiation to polymerize and harden the same, and (4) providing a magnetic layer on the radiation exposed layer. The thus prepared magnetic recording medium is not accompanied by dropout due to "fish eyes" and is suitable for high density recording.
摘要翻译：公开了一种制备磁记录介质的方法，其包括：（1）对具有不小于0.01μm的表面粗糙度的非磁性载体的表面进行磨损处理或压延处理，（2）包含通过辐射暴露可聚合的化合物在非磁性载体的表面上，（3）将该层暴露于辐射以聚合并使其硬化，以及（4）在辐射暴露层上提供磁性层。这样制备的磁记录介质不伴随“鱼眼”的脱落，适用于高密度记录。

10. 发明授权

US4661377A Process for producing a magnetic recording medium having an improved dimensional stability 失效
标题翻译：具有改善尺寸稳定性的磁记录介质的制造方法
公开(公告)号：US4661377A
公开(公告)日：1987-04-28
申请号：US569887
申请日：1984-01-11
申请人： Kazuhiko Morita , Shigeo Komine , Akira Kasuga , Noburo Hibino
发明人： Kazuhiko Morita , Shigeo Komine , Akira Kasuga , Noburo Hibino
IPC分类号： B29C71/02 , B29D17/00 , G11B5/73 , G11B5/84 , H01F10/02
CPC分类号： B29C71/02 , B29D17/005 , G11B5/7305 , G11B5/84
摘要： A heat-treating process is disclosed. The process involves cutting a polymer support for a recording medium from a web roll of a long support base into a sheet form. The sheet or sheets in a superposed state are then heat-treated while applying pressure in the range of 1 g/cm.sup.2 to 1 kg/cm.sup.2 at a temperature of 50.degree. C. to 150.degree. C. for a period of time of 15 seconds to 24 hours. The heat treating process avoids conventional problems with respect to thermal shrinkage.
摘要翻译：公开了热处理工艺。该方法包括将用于记录介质的聚合物载体从长支撑基底的卷筒纸切割成片状。然后在50℃至150℃的温度下，在1g / cm 2至1kg / cm 2的压力下施加处于叠加状态的片材或片材，持续15秒的时间至24小时。热处理方法避免了热收缩的常规问题。

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