公开(公告)号：US06372325B1

公开(公告)日：2002-04-16

申请号：US09524757

申请日：2000-03-13

申请人： Kiyomi Ejiri ,  Koji Naoe ,  Masatoshi Takahashi

发明人： Kiyomi Ejiri ,  Koji Naoe ,  Masatoshi Takahashi

IPC分类号： G11B568

CPC分类号： G11B5/70 ,  Y10S428/90 ,  Y10T428/24355

摘要： Disclosed is a magnetic recording medium having a flexible nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder on the support, and a magnetic layer containing a ferromagnetic powder and a binder. The magnetic layer has an average thickness d of 0.01 to 0.3 &mgr;m, a ratio &sgr;/d of a standard deviation &sgr; in the thickness of the magnetic layer to the average thickness d equal to or less than 0.5, and, according to the roughness spectrum of a magnetic layer surface measured with an atomic force microscope, a PSD of 0.5 nm2 or lower in a wavelength of 1 to 5 &mgr;m and a PSD of 0.02 to 0.5 nm2 in a wavelength of 0.5 &mgr;m or more to less than 1 &mgr;m.

摘要翻译： 公开了一种具有柔性非磁性载体，在载体上含有非磁性粉末和粘合剂的非磁性层以及含有铁磁粉末和粘合剂的磁性层的磁记录介质。 磁性层的平均厚度d为0.01〜0.3μm，磁性层的厚度的标准偏差σ与平均厚度d的比值σ/ d等于或小于0.5，根据粗糙度谱 使用原子力显微镜测量的磁性层表面，波长为1-5μm的0.5nm2以下的PSD，波长为0.5μm以上且小于1μm的PSD为0.02〜0.5nm 2。

公开(公告)号：US5480716A

公开(公告)日：1996-01-02

申请号：US262843

申请日：1994-06-21

申请人： Koji Naoe ,  Kiyomi Ejiri

发明人： Koji Naoe ,  Kiyomi Ejiri

IPC分类号： B22F1/00 ,  C09D5/23 ,  G11B5/706 ,  G11B5/712 ,  G11B5/73 ,  H01F1/06 ,  G11B5/00

CPC分类号： G11B5/70621 ,  G11B5/712 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/27 ,  Y10T428/2991

摘要： A magnetic recording medium is disclosed which includes a magnetic layer containing ferromagnetic metal particles containing Al in an amount of 0.5 to 6% by weight per the total weight of metal components contained in the ferromagnetic metal particles, the ferromagnetic metal particles having the surfaces thereof coated with a compound or compounds of formula (1) or (2), as described herein. The magnetic recording medium has reduced abrasion with respect to magnetic heads and does not cause magnetic head fouling even under low humidity conditions.

摘要翻译： 公开了一种磁记录介质，其包括含铁磁金属颗粒的磁性层，所述铁磁金属颗粒含有铁含量为铁磁性金属颗粒中所含金属组分总重量的0.5至6重量％的Al，其表面涂覆有强磁性金属颗粒 与式（1）或（2）的化合物或化合物反应。 磁记录介质相对于磁头具有减少的磨损，即使在低湿度条件下也不会引起磁头结垢。

公开(公告)号：US07901805B2

公开(公告)日：2011-03-08

申请号：US11729842

申请日：2007-03-30

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： G11B5/706

CPC分类号： G11B5/70 ,  G11B5/70678 ,  G11B5/7085 ,  G11B5/714 ,  G11B5/842

摘要： A magnetic recording medium, which comprises: a nonmagnetic support; and a magnetic layer comprising a ferromagnetic powder and a binder, wherein an average surface roughness (Ra) at a center of a surface of the magnetic layer measured by using an atomic force microscope (AFM) is 2 nm or less, the maximum height (Rmax) thereof is 50 nm or less, and an arithmetic average of phase difference between a drive signal and a response signal of a probe measured with the atomic force microscope in a tapping mode is from 2 to 20°, and a method of producing the same.

摘要翻译： 一种磁记录介质，包括：非磁性载体; 以及包含铁磁粉末和粘合剂的磁性层，其中通过使用原子力显微镜（AFM）测量的磁性层表面的中心处的平均表面粗糙度（Ra）为2nm以下，最大高度 Rmax）为50nm以下，并且利用原子力显微镜在攻丝模式中测量的探针的驱动信号与响应信号之间的相位差的算术平均值为2〜20°， 相同。

公开(公告)号：US07635499B2

公开(公告)日：2009-12-22

申请号：US11033973

申请日：2005-01-13

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： B05D5/00

CPC分类号： G11B5/8412 ,  G11B5/7085 ,  G11B5/842

摘要： The present invention provides a method of manufacturing a magnetic recording medium that is made by applying a magnetic paint containing a ferromagnetic powder and a binder to a nonmagnetic support, wherein the magnetic paint contains a magnetic liquid, which contains the ferromagnetic powder and the binder, and a polishing material liquid, which contains a polishing material and a solvent, and wherein the magnetic liquid and the polishing material liquid are individually subjected to dispersion treatment, the magnetic liquid and the polishing material liquid are then mixed together, and after that, a mixed liquid of the magnetic liquid and the polishing material liquid are subjected to dispersion treatment by application of ultrasonic waves.

摘要翻译： 本发明提供一种制造磁记录介质的方法，该磁记录介质通过将含有铁磁性粉末和粘合剂的磁性涂料涂覆在非磁性载体上而制成，其中磁性涂料含有含有铁磁粉末和粘合剂的磁性液体， 以及包含研磨材料和溶剂的研磨材料液，其中分别对磁性液体和研磨材料液进行分散处理，然后将磁性液体和研磨材料液混合在一起，然后将 通过施加超声波对磁性液体和研磨材料液的混合液进行分散处理。

公开(公告)号：US07172819B2

公开(公告)日：2007-02-06

申请号：US10601631

申请日：2003-06-24

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： B05D3/00 ,  B05D5/12

CPC分类号： G11B5/842 ,  Y10T428/12146

摘要： In the method for producing a magnetic recording medium having a nonmagnetic substrate coated with a magnetic coating material containing a ferromagnetic powder and a binder, the magnetic coating material contains a liquid A constituted by the ferromagnetic powder and a solvent, and a solution B of the binder, and the liquid A and the solution B are mixed together by a thin-layer revolving-type fast stirring apparatus, and are thereafter subjected to dispersion processing. Thereby, coagulated particles of the ferromagnetic powder can be dispersed and the coagulation of the ferromagnetic powder can be prevented, thus making it possible to obtain a liquid of ferromagnetic powder with uniform adsorption of the binder. As a result, a magnetic coating material suitable for a low-noise high-density coating-type magnetic recording medium is obtained.

摘要翻译： 在具有涂覆有含铁磁粉末和粘合剂的磁性涂层材料的非磁性基材的磁记录介质的制造方法中，磁性涂层材料含有由铁磁粉末和溶剂构成的液体A， 粘合剂，液体A和溶液B通过薄层旋转式快速搅拌装置混合在一起，然后进行分散处理。 由此，可以分散铁磁性粉末的凝结粒子，能够防止铁磁性粉末的凝结，从而可以获得粘合剂均匀吸附的铁磁性粉末液体。 结果，得到适用于低噪声高密度涂布型磁记录介质的磁性涂料。

公开(公告)号：US20050265120A1

公开(公告)日：2005-12-01

申请号：US11139486

申请日：2005-05-31

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： B01F3/12 ,  B01F7/16 ,  B01F7/18 ,  B01F11/02 ,  B01F15/06

CPC分类号： B01F3/1221 ,  B01F3/1242 ,  B01F7/18 ,  B01F11/0225 ,  B01F11/0258 ,  B01F15/065 ,  B01F2215/0431 ,  B01F2215/0454 ,  B01F2215/0481

摘要： An ultrasonic dispersion device of a batch type comprising an ultrasonic oscillator and a liquid vessel, wherein an oscillation frequency of the ultrasonic oscillator is 20 kHz or less, the ultrasonic oscillator is secured to the liquid vessel, and the ultrasonic oscillator is able to come into contact with a treated liquid.

摘要翻译： 一种包括超声波振荡器和液体容器的分批式超声波分散装置，其中超声波振荡器的振荡频率为20kHz以下，超声波振荡器固定在液体容器上，超声波振荡器能够进入 与处理过的液体接触。

公开(公告)号：US20050153062A1

公开(公告)日：2005-07-14

申请号：US11033973

申请日：2005-01-13

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： B05D5/12 ,  G11B5/708 ,  G11B5/84 ,  G11B5/842

CPC分类号： G11B5/8412 ,  G11B5/7085 ,  G11B5/842

摘要： The present invention provides a method of manufacturing a magnetic recording medium that is made by applying a magnetic paint containing a ferromagnetic powder and a binder to a nonmagnetic support, wherein the magnetic paint contains a magnetic liquid, which contains the ferromagnetic powder and the binder, and a polishing material liquid, which contains a polishing material and a solvent, and wherein the magnetic liquid and the polishing material liquid are individually subjected to dispersion treatment, the magnetic liquid and the polishing material liquid are then mixed together, and after that, a mixed liquid of the magnetic liquid and the polishing material liquid are subjected to dispersion treatment by application of ultrasonic waves.

摘要翻译： 本发明提供一种制造磁记录介质的方法，该磁记录介质通过将含有铁磁性粉末和粘合剂的磁性涂料涂覆在非磁性载体上而制成，其中磁性涂料含有含有铁磁粉末和粘合剂的磁性液体， 以及包含研磨材料和溶剂的研磨材料液，其中分别对磁性液体和研磨材料液进行分散处理，然后将磁性液体和研磨材料液混合在一起，然后将 通过施加超声波对磁性液体和研磨材料液的混合液进行分散处理。

公开(公告)号：US07297363B2

公开(公告)日：2007-11-20

申请号：US10601593

申请日：2003-06-24

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： B05D5/12

CPC分类号： G11B5/714 ,  G11B5/8412

摘要： In the method for producing a magnetic recording medium having a nonmagnetic substrate coated with a magnetic coating material containing a ferromagnetic powder and a binder, the magnetic coating material contains a liquid A constituted by the ferromagnetic powder and a solvent, and a solution B of the binder, and the liquid A and the solution B are mixed together by applying an ultrasonic wave thereto, and are thereafter subjected to dispersion processing. Thereby, coagulated particles of the ferromagnetic powder can be dispersed and the coagulation of the ferromagnetic powder can be prevented, thus making it possible to obtain a liquid of ferromagnetic powder with uniform adsorption of the binder. As a result, a magnetic coating material suitable for a low-noise high-density coating-type magnetic recording medium is obtained.

摘要翻译： 在具有涂覆有含铁磁粉末和粘合剂的磁性涂层材料的非磁性基材的磁记录介质的制造方法中，磁性涂层材料含有由铁磁粉末和溶剂构成的液体A， 粘合剂，并且通过向其施加超声波将液体A和溶液B混合在一起，然后进行分散处理。 由此，可以分散铁磁性粉末的凝结粒子，能够防止铁磁性粉末的凝结，从而可以获得粘合剂均匀吸附的铁磁性粉末液体。 结果，得到适用于低噪声高密度涂布型磁记录介质的磁性涂料。

公开(公告)号：US20070231612A1

公开(公告)日：2007-10-04

申请号：US11729842

申请日：2007-03-30

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： G11B5/708 ,  B05D5/12

CPC分类号： G11B5/70 ,  G11B5/70678 ,  G11B5/7085 ,  G11B5/714 ,  G11B5/842

摘要： A magnetic recording medium, which comprises: a nonmagnetic support; and a magnetic layer comprising a ferromagnetic powder and a binder, wherein an average surface roughness (Ra) at a center of a surface of the magnetic layer measured by using an atomic force microscope (AFM) is 2 nm or less, the maximum height (Rmax) thereof is 50 nm or less, and an arithmetic average of phase difference between a drive signal and a response signal of a probe measured with the atomic force microscope in a tapping mode is from 2 to 20°, and a method of producing the same.

摘要翻译： 一种磁记录介质，包括：非磁性载体; 以及包含铁磁粉末和粘合剂的磁性层，其中通过使用原子力显微镜（AFM）测量的磁性层表面的中心处的平均表面粗糙度（Ra）为2nm以下，最大高度 Rmax）为50nm以下，并且利用原子力显微镜在攻丝模式中测量的探针的驱动信号与响应信号之间的相位差的算术平均值为2〜20°， 相同。

公开(公告)号：US07166317B2

公开(公告)日：2007-01-23

申请号：US10678094

申请日：2003-10-06

申请人： Koji Naoe

发明人： Koji Naoe

IPC分类号： B05D5/12

CPC分类号： G11B5/842 ,  G11B5/8412

摘要： The method is for manufacturing the magnetic recording medium in which a magnetic coating containing a ferromagnetic powder and a binder is applied on a nonmagnetic support. The magnetic coating includes: a magnetic liquid containing a ferromagnetic powder and a binder, and an abrasive liquid containing an abrasive and a solvent. The abrasive liquid may further contain the binder. The magnetic liquid and the abrasive liquid are each separately subjected to dispersion treatment, then the abrasive liquid is filtered, and then the magnetic liquid and the abrasive liquid are mixed. The obtained magnetic recording medium has a smooth magnetic layer surface, good electromagnetic conversion properties and excellent running durability and shows little wear of a head.

摘要翻译： 该方法用于制造磁性记录介质，其中含有铁磁性粉末和粘合剂的磁性涂层涂覆在非磁性载体上。 磁性涂层包括：含有铁磁粉末和粘合剂的磁性液体，以及含有研磨剂和溶剂的磨料液体。 研磨液体还可以含有粘合剂。 磁性液体和研磨液分别进行分散处理，然后对磨料液进行过滤，然后混合磁性液体和磨料液体。 所得到的磁记录介质具有光滑的磁性层表面，良好的电磁转换特性和良好的运行耐久性，并且几乎不影响磁头的磨损。