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1. 发明授权

US06630256B2 Magnetic recording medium comprising a non-magnetic layer having inorganic particles of specific size and distribution 有权
公开(公告)号：US06630256B2
公开(公告)日：2003-10-07
申请号：US09919405
申请日：2001-07-31
申请人： Masaki Suzuki , Toshihiko Miura , Masatoshi Takahashi , Hiroaki Takano
发明人： Masaki Suzuki , Toshihiko Miura , Masatoshi Takahashi , Hiroaki Takano
IPC分类号： B32B516
CPC分类号： G11B5/733
摘要： Provided is a magnetic recording medium with a total thickness equal to or less than 8 &mgr;m having good electromagnetic characteristics and good repeat running durability in which the dropping of powder onto the running path and tape edge deformation are prevented and a magnetic recording medium with a total thickness equal to or less than 8 &mgr;m having good electromagnetic characteristics, good repeat running durability, and good dimensional stability. A magnetic recording medium having on one surface of a nonmagnetic support a lower layer comprising an inorganic powder and a binder and an upper magnetic layer comprising a ferromagnetic powder and a binder in that order, and having on the other surface thereof a backcoat layer, wherein: said nonmagnetic support comprises inorganic powder particles with a mean primary particle diameter in a range of from 40 to 200 nm; the number of particles of said inorganic powder in the cross-section of said nonmagnetic support is in a range of from 10 to 200/100 &mgr;m2, said nonmagnetic support exhibits a coercivity in a range of from 159 to 239 kA/m; and the overall thickness is equal to or less than 8 &mgr;m. A magnetic recording medium having on one surface of a nonmagnetic support a lower layer comprising an inorganic powder and a binder and an upper magnetic layer comprising a ferromagnetic powder and a binder in that order, and having on the other surface thereof a backcoat layer, wherein: said nonmagnetic support comprises inorganic powder particles with a mean primary particle diameter in a range of from 10 to 200 nm; the number of particles of said inorganic powder in the cross-section of said nonmagnetic support is in the range of from 10 to 200/100 &mgr;m2, the amount of curl d in the direction of width of said magnetic recording medium is equal to or higher than 0.4 mm and equal to or less than 1.0 mm in the direction of protrusion of the magnetic layer at a width of 6.35 mm; and the overall thickness is equal to or less than 8 &mgr;m.

2. 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。

3. 发明授权

US5238753A Magnetic recording medium kubbed with a super hard alloy blade containing tungsten carbide power and cobalt 失效
标题翻译：磁记录介质采用含有碳化钨功率和钴的超硬合金刀片
公开(公告)号：US5238753A
公开(公告)日：1993-08-24
申请号：US616958
申请日：1990-11-21
申请人： Katsumi Ryoke , Youichi Hayata , Junji Yazawa , Toshihiko Miura , Masaki Suzuki , Tatsuya Oguri
发明人： Katsumi Ryoke , Youichi Hayata , Junji Yazawa , Toshihiko Miura , Masaki Suzuki , Tatsuya Oguri
IPC分类号： G11B5/70 , G11B5/84
CPC分类号： G11B5/70 , G11B5/84 , Y10S428/90
摘要： A magnetic recording medium having well-balanced properties with respect to head abrasion characteristics, head cleaning characteristics and drop out characteristics is disclosed, which comprises a non-magnetic support having thereon a magnetic layer containing a ferromagnetic powder and a binder, wherein the magnetic layer has been brought into contact with a carbon steel alloy or super hard alloy made from powders having a Mohs' hardness of at lease 6 and rubbed therewith. A process of producing the magnetic recording medium is also disclosed.
摘要翻译：公开了一种相对于头部磨损特性，头部清洁特性和脱落特性具有良好平衡性能的磁记录介质，其包括其上具有含有铁磁性粉末和粘合剂的磁性层的非磁性载体，其中磁性层已经与由莫氏硬度至少为6并与之摩擦的粉末制成的碳钢合金或超硬合金接触。还公开了制造磁记录介质的方法。

4. 发明授权

US5847905A Cleaning medium for magnetic recording devices, in which the cleaning medium includes a substrate, a lower coating layer containing non-magnetic inorganic particles, and a cleaning area 失效
标题翻译：用于磁记录装置的清洁介质，其中清洁介质包括基底，含有非磁性无机颗粒的下涂层和清洁区
公开(公告)号：US5847905A
公开(公告)日：1998-12-08
申请号：US789563
申请日：1997-01-28
申请人： Hiroo Inaba , Masaki Suzuki , Satoshi Matsubaguchi , Hiroaki Takano
发明人： Hiroo Inaba , Masaki Suzuki , Satoshi Matsubaguchi , Hiroaki Takano
IPC分类号： G11B5/187 , G11B5/41 , G11B15/62
CPC分类号： G11B5/41 , G11B15/62 , G11B5/1871
摘要： A cleaning medium for magnetic recording devices comprises a non-magnetic substrate and 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. The cleaning medium also comprises a cleaning layer, which is overlaid upon the lower coating layer and contains a binder and inorganic particles dispersed in the binder, the inorganic particles at least containing ferromagnetic particles. The thickness of the cleaning layer falls within the range of 0.05 .mu.m to 1.0 .mu.m, and the squareness ratio of the cleaning layer falls within the range of 0.6 to 0.98. The cleaning medium yields little wear of magnetic heads, has good cleaning characteristics, and is capable of trueing up the shape of an end of a cleaned magnetic head into a sharp shape, such that the compatibility of the magnetic head with both of a metal evaporated tape and a metal powder tape in coming into close and uniform contact with the tapes may be kept good.
摘要翻译：用于磁记录装置的清洁介质包括非磁性基底和下涂层，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非磁性无机颗粒。清洁介质还包括清洁层，其覆盖在下涂层上并且包含粘合剂和分散在粘合剂中的无机颗粒，所述无机颗粒至少含有铁磁颗粒。清洗层的厚度在0.05μm〜1.0μm的范围内，清洗层的矩形比落在0.6〜0.98的范围内。清洁介质的磁头几乎没有磨损，具有良好的清洁特性，并且能够将清洁的磁头的端部的形状实现为尖锐的形状，使得磁头与金属蒸发的相容性胶带和与胶带紧密均匀接触的金属粉末胶带可能保持良好。

5. 发明授权

US5876833A Magnetic recording medium containing magnetic powder and a polyurethane binder having a specified radius of gyration 失效
标题翻译：含有磁性粉末和具有规定的回转半径的聚氨酯粘结剂的磁记录介质
公开(公告)号：US5876833A
公开(公告)日：1999-03-02
申请号：US956796
申请日：1997-10-23
申请人： Masaki Suzuki , Hiroshi Hashimoto , Satoshi Matsubaguchi , Hiroaki Takano
发明人： Masaki Suzuki , Hiroshi Hashimoto , Satoshi Matsubaguchi , Hiroaki Takano
IPC分类号： G11B5/70 , G11B5/702
CPC分类号： G11B5/70 , G11B5/7021 , Y10S428/90 , Y10T428/24355 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/31609
摘要： A magnetic recording medium is disclosed, comprising a magnetic layer mainly comprising a ferromagnetic powder and a binder resin formed on at least one side of a non-magnetic support, wherein said magnetic layer has a thickness of from 0.05 .mu.m to 0.8 .mu.m, said ferromagnetic powder has an average long axis length of from 0.05 .mu.m to 0.20 .mu.m, and said binder resin comprises a polyurethane having a radius of gyration from 5 to 25 nm in cyclohexanone.
摘要翻译：公开了一种磁记录介质，包括主要包括铁磁粉末和形成在非磁性载体的至少一侧上的粘合剂树脂的磁性层，其中所述磁性层的厚度为0.05μm至0.8μm，所述铁磁粉末的平均长轴长度为0.05μm〜0.20μm，所述粘合剂树脂包含在环己酮中具有5〜25nm的回转半径的聚氨酯。

6. 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。

7. 发明授权

US07072143B2 Tape reel 有权
公开(公告)号：US07072143B2
公开(公告)日：2006-07-04
申请号：US10285523
申请日：2002-11-01
申请人： Masanosuke Kunikata , Masaki Suzuki , Hiroaki Takano
发明人： Masanosuke Kunikata , Masaki Suzuki , Hiroaki Takano
IPC分类号： G11B23/02
CPC分类号： G11B23/037 , G11B5/70 , G11B5/78 , G11B15/66
摘要： A normal tape reel is disclosed, comprising a tape reel portion and a magnetic tape wound on the reel core of the tape reel portion, wherein the ratio of the winding radius R of the magnetic tape to the radius r of the reel core (R/r) is not smaller than 3.5 and the winding hardness of the magnetic tape is adjusted to a range of from 1.9 to 11.5 N.

8. 发明授权

US06579592B1 Magnetic recording tape with controlled Hc and magnetic flux/unit area value and controlled Cl/Fe intensity 失效
标题翻译：具有受控Hc和磁通量/单位面积值和受控Cl / Fe强度的磁记录带
公开(公告)号：US06579592B1
公开(公告)日：2003-06-17
申请号：US09324754
申请日：1999-06-03
申请人： Satoshi Matsubaguchi , Masaki Suzuki , Hiroaki Doushita , Hiroaki Takano , Hiroo Inaba , Kiyomi Ejiri
发明人： Satoshi Matsubaguchi , Masaki Suzuki , Hiroaki Doushita , Hiroaki Takano , Hiroo Inaba , Kiyomi Ejiri
IPC分类号： G11B5702
CPC分类号： G11B5/70621 , G11B5/70 , Y10T428/24355 , Y10T428/25 , Y10T428/26 , Y10T428/2982 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording tape is described, which comprises a plastic support having provided thereon a magnetic layer comprising a ferromagnetic metal powder dispersed in a binder, wherein the magnetic layer has the product P of the coercivity Hc (Oe) in the in-plane machine direction of the tape and the magnetic flux &phgr;m (G·cm) of from 100 to 160.
摘要翻译：描述了一种磁记录带，其包括在其上设置有包含分散在粘合剂中的强磁性金属粉末的磁性层的塑料支撑体，其中磁性层具有在平面机器方向上的矫顽力Hc（Oe）的乘积P 的磁带和磁通量（G.cm）为100至160。

9. 发明授权

US06686022B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06686022B2
公开(公告)日：2004-02-03
申请号：US09990610
申请日：2001-11-21
申请人： Hiroaki Takano , Masaki Suzuki , Masanosuke Kunikata
发明人： Hiroaki Takano , Masaki Suzuki , Masanosuke Kunikata
IPC分类号： G11B5708
CPC分类号： G11B5/70678 , G11B5/7085 , Y10T428/24975 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： Provided is a particulate magnetic recording medium with good output at high frequency, yielding a low coefficient of friction, and having good running properties, in particular, a magnetic recording medium affording good electromagnetic characteristics and good repeat durability in recording and reproducing at a high-density. The magnetic recording medium comprises a lower layer comprising a nonmagnetic powder and a binder and an upper magnetic layer comprising a ferromagnetic powder, a binder and at least one abrasives provided on a nonmagnetic support in this order. The number of abrasive particles present on said magnetic layer surface satisfied the relation 0.2≦X≦1.2 (particles/&mgr;m2). When the number of pairs of abrasive particles satisfying the relation L≦2K (where K denotes the mean particle diameter of the abrasive and L denotes the distance from the center of gravity of one of the abrasive particles to the center of gravity of the other abrasive particle) is denoted as Y (particles/&mgr;m2), Y/X is equal to or less than 2.
摘要翻译：本发明提供一种具有良好的高频输出的微粒磁记录介质，产生低摩擦系数，并且具有良好的运行特性，特别是在高速记录和再现时具有良好的电磁特性和良好的重复耐久性的磁记录介质，密度。磁记录介质包括下层，其包含非磁性粉末和粘合剂，以及上层磁性层，其包含铁磁性粉末，粘合剂和至少一种按照这种顺序设置在非磁性载体上的研磨剂。存在于所述磁性层表面上的磨料颗粒的数量满足关系0.2 <= X <= 1.2（颗粒/母体2）。当满足关系L <= 2K（其中K表示研磨剂的平均粒径）和L表示从研磨颗粒之一的重心到另一个的重心的距离的磨粒的数目磨料颗粒）表示为Y（颗粒/ mum 2），Y / X等于或小于2。

10. 发明授权

US5908683A Magnetic recording medium 失效
标题翻译：磁记录介质
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％。

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