专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US06827968B2 Process for producing magnetic recording medium 有权
标题翻译：磁记录介质的制造方法
公开(公告)号：US06827968B2
公开(公告)日：2004-12-07
申请号：US10601559
申请日：2003-06-24
申请人： Koji Naoe
发明人： Koji Naoe
IPC分类号： B05D512
CPC分类号： G11B5/8404 , G11B5/738 , Y10S428/90
摘要： A process for producing a magnetic recording medium is provided, the medium being formed from a non-magnetic flexible support, a non-magnetic layer comprising a non-magnetic powder and a binder, and a magnetic layer comprising a ferromagnetic powder and a binder. The non-magnetic layer is provided on top of the support, the magnetic layer is provided on top of the non-magnetic layer, and the non-magnetic powder includes two or more types of non-magnetic powder, including carbon black and a non-magnetic powder other than carbon black. The process includes a step of separately dispersing a non-magnetic liquid A that includes a binder and a non-magnetic powder other than carbon black, and a non-magnetic liquid B that includes carbon black and a binder, and a step of stirring and mixing the non-magnetic liquid A and the non-magnetic liquid B to prepare a non-magnetic coating solution.
摘要翻译：提供了一种用于制造磁记录介质的方法，所述介质由非磁性柔性支撑件，包括非磁性粉末和粘合剂的非磁性层以及包含铁磁性粉末和粘合剂的磁性层形成。非磁性层设置在支撑体的顶部，磁性层设置在非磁性层的顶部，非磁性粉末包括两种或更多种非磁性粉末，包括炭黑和非磁性粉末除碳黑以外的磁粉。该方法包括分别分散包含粘合剂的非磁性液体A和除了炭黑以外的非磁性粉末的非磁性液体A和包括炭黑和粘合剂的非磁性液体B的步骤，混合非磁性液体A和非磁性液体B以制备非磁性涂层溶液。

22. 发明授权

US06548160B2 Magnetic recording media 有权
标题翻译：磁记录媒体
公开(公告)号：US06548160B2
公开(公告)日：2003-04-15
申请号：US09728308
申请日：2000-12-01
申请人： Koji Naoe , Kiyomi Ejiri
发明人： Koji Naoe , Kiyomi Ejiri
IPC分类号： G11B5708
CPC分类号： G11B5/708 , Y10T428/256 , Y10T428/265
摘要： The present invention aims to provide a magnetic recording medium capable of high-density recording with excellent running durability and preservability as well as a magnetic recording medium capable of high-density recording with low noise even at high output and excellent running durability. Disclosed are a magnetic recording medium comprises a magnetic layer containing a ferromagnetic powder and a binder provided on a nonmagnetic flexible substrate and a magnetic recording medium comprising a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder provided in this order on a nonmagnetic flexible substrate. Provided that said magnetic layer contains a zirconia powder having an average primary particle diameter of 0.005-0.2 &mgr;m, or said magnetic layer has an average thickness in the range of 0.04-0.3 &mgr;m, said ferromagnetic powder is a metal alloy powder having a as of 130 A.m2/kg or more, and said magnetic layer contains a granulated powder having an average primary particle diameter of 0.005-0.2 &mgr;m and a specific gravity of 5 or more.
摘要翻译：本发明的目的是提供一种具有优异的运行耐久性和保存性的高密度记录的磁记录介质以及即使在高输出下也能够以低噪声进行高密度记录的磁记录介质和优异的运行耐久性。磁记录介质包括含有铁磁性粉末和设置在非磁性柔性基板上的粘合剂的磁性层和包含非磁性粉末和粘合剂的非磁性层的磁记录介质和含有铁磁粉末和粘结剂的磁性层订购非磁性柔性基板。假设所述磁性层含有平均一次粒径为0.005-0.2μm的氧化锆粉末，或者所述磁性层的平均厚度在0.04-0.3μm的范围内，所述铁磁性粉末是具有 130Am 2 / kg以上，所述磁性层含有平均一次粒径为0.005〜0.2μm，比重为5以上的造粒粉末。

23. 发明授权

US06479131B1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06479131B1
公开(公告)日：2002-11-12
申请号：US09596345
申请日：2000-06-19
申请人： Kiyomi Ejiri , Koji Naoe , Masahiko Mori
发明人： Kiyomi Ejiri , Koji Naoe , Masahiko Mori
IPC分类号： G11B5733
CPC分类号： G11B5/738 , Y10T428/24355 , Y10T428/2495 , Y10T428/25 , Y10T428/265 , Y10T428/2982
摘要： Disclosed is a magnetic recording medium exhibiting a high C/N ratio in high-density magnetic recording. The magnetic recording medium has, on a flexible nonmagnetic support, at least a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder on the nonmagnetic layer, where the magnetic layer has an average thickness d in the range of from 0.01 to 0.3 &mgr;m, said nonmagnetic powder has an acicular shape, and the ratio of a mean length L of the major axis of the nonmagnetic powder to an average thickness D of said nonmagnetic layer satisfies the relationship of 1/10≦L/D≦2.
摘要翻译：公开了在高密度磁记录中表现出高C / N比的磁记录介质。磁性记录介质在柔性非磁性载体上至少包含非磁性粉末和粘合剂的非磁性层和在非磁性层上含有铁磁粉末和粘合剂的磁性层，其中磁性层的平均厚度d在 0.01〜0.3μm的范围，所述非磁性粉末具有针状，非磁性粉末的长轴的平均长度L与所述非磁性层的平均厚度D的比例满足1/10 < = L / D <= 2。

24. 发明授权

US06475598B1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06475598B1
公开(公告)日：2002-11-05
申请号：US09602225
申请日：2000-06-23
申请人： Koji Naoe , Kiyomi Ejiri , Masahiko Mori
发明人： Koji Naoe , Kiyomi Ejiri , Masahiko Mori
IPC分类号： G11B568
CPC分类号： B82Y15/00 , G11B5/7085 , G11B5/7305 , G11B5/738 , Y10S428/90 , Y10T428/24355 , Y10T428/24975 , Y10T428/25 , Y10T428/265
摘要： The present invention provides a magnetic recording medium exhibiting a high C/N ratio as well as having excellent running durability even under high-density magnetic recording. Disclosed is a magnetic recording medium comprising, on either side of a flexible nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order, having an average thickness of said magnetic layer of from 0.01 to 0.3 &mgr;m and a total average thickness of said magnetic layer and said nonmagnetic layer of from 0.1 to 1.0 &mgr;m, characterized in that the number of projections having a height equal to or higher than 20 nm on the magnetic layer surface measured with AFM (Atomic Force Microscope) is equal to or less than 100 pieces per 30 &mgr;m×30 &mgr;m square as well as the PSD (Power Spectrum Density) of the magnetic layer surface measured with the AFM is equal to or less than 0.2 nm2 in the wavelength of from of 1 to 5 &mgr;m.
摘要翻译：本发明提供了一种表现出高C / N比的磁记录介质，并且即使在高密度磁记录下也具有优异的运行耐久性。公开了一种磁记录介质，其在柔性非磁性载体的任一侧上包含非磁性层含有非磁性粉末和粘合剂以及含有铁磁性粉末和粘合剂的磁性层，所述磁性层的平均厚度为0.01〜0.3μm，所述磁性层和所述非磁性层的总平均厚度为 0.1〜1.0μm，其特征在于，使用AFM（原子力显微镜）测定的磁性层表面上的高度等于或大于20nm的突起的数量等于或小于每30mum×30μm的正方形100个以及用AFM测量的磁性层表面的PSD（功率谱密度）在1至5的波长中等于或小于0.2nm 2 妈妈

25. 发明授权

US6074724A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US6074724A
公开(公告)日：2000-06-13
申请号：US918864
申请日：1997-08-26
申请人： Hiroo Inaba , Kiyomi Ejiri , Masaki Suzuki , Koji Naoe , Yuichiro Murayama , Hiroaki Takano
发明人： Hiroo Inaba , Kiyomi Ejiri , Masaki Suzuki , Koji Naoe , Yuichiro Murayama , Hiroaki Takano
IPC分类号： G11B5/702 , G11B5/706
CPC分类号： B82Y15/00 , G11B5/7021 , G11B5/7022 , G11B5/70621 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium is disclosed, which comprises a support having thereon a magnetic layer comprising a binder and a ferromagnetic powder dispersed therein, wherein said binder comprises a polyurethane resin having at least one cyclic hydrocarbon group and at least one ether linkage, and said ferromagnetic powder is a ferromagnetic metallic powder which comprises Fe and has a mean major-axis length of from 0.05 to 0.19 .mu.m and a crystallite size of from 100 to 230 .ANG.; and further a magnetic recording medium is disclosed, comprising a support having thereon in succession an undercoat layer comprising a binder U and an inorganic powder dispersed therein and a magnetic layer comprising a binder M and a ferromagnetic powder dispersed therein, wherein at least either of the binder U or M comprises a polyurethane resin having at least one cyclic hydrocarbon group and at least one ether linkage and said ferromagnetic powder is a ferromagnetic metallic powder which comprises Fe and has a mean major-axis length of from 0.05 to 0.19 .mu.m and a crystallite size of from 100 to 230 .ANG..
摘要翻译：公开了一种磁记录介质，其包括其上具有包含粘合剂和分散在其中的铁磁粉末的磁性层的载体，其中所述粘合剂包含具有至少一个环状烃基和至少一个醚键的聚氨酯树脂，并且所述铁磁性粉末是含铁的铁磁性金属粉末，其平均长轴长度为0.05至0.19μm，微晶尺寸为100至230安培; 并且还公开了一种磁记录介质，包括其上连续地具有包含粘合剂U和分散在其中的无机粉末的底涂层的支撑体和包含粘合剂M和分散在其中的铁磁性粉末的磁性层，其中，粘合剂U或M包含具有至少一个环状烃基和至少一个醚键的聚氨酯树脂，并且所述铁磁性粉末是包含Fe并且具有0.05至0.19μm的平均长轴长度的铁磁性金属粉末，以及微晶尺寸为100至230安培。

26. 发明授权

US5955189A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5955189A
公开(公告)日：1999-09-21
申请号：US773512
申请日：1996-12-23
申请人： Kiyomi Ejiri , Koji Naoe
发明人： Kiyomi Ejiri , Koji Naoe
IPC分类号： G11B5/706 , G11B5/708 , G11B5/714
CPC分类号： G11B5/7085 , G11B5/70621 , G11B5/708 , G11B5/714 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/265
摘要： A magnetic recording medium includes at least one magnetic layer formed by dispersing a ferromagnetic powder in a binder, the ferromagnetic powder including at least one kind of rare earth metal element selected from Y or metal elements of lanthanide series and being constituted of acicular ferromagnetic alloy powder particles whose .sigma. s is in the range of 120 to 160 emu/g, whose average longitudinal axis length is in the range of 0.04 to 0.2 .mu.m and whose crystallite size is in the range of 100 to 300 angstroms, the magnetic layer including an abrasive agent whose average particle diameter is in the range of 0.03 to 0.3 .mu.m and containing carbon black having an average particle diameter of 50 to 300 m.mu.. The magnetic recording medium has an excellent electromagnetic conversion characteristics and, particularly, a good preservation capability and can prevent a magnetic head from being abraded.
摘要翻译：磁记录介质包括通过将铁磁粉末分散在粘合剂中形成的至少一个磁性层，所述铁磁粉末包括选自Y或稀土金属元素中的至少一种稀土金属元素或镧系金属元素，并由针状铁磁合金粉末其sigma在120〜160emu / g的范围内，其平均纵轴长度在0.04〜0.2μm的范围内，其微晶尺寸在100〜300埃的范围内，所述磁性层包括研磨剂的平均粒径在0.03〜0.3μm的范围内，并且含有平均粒径为50〜300μm的碳黑。磁记录介质具有优异的电磁转换特性，特别是具有良好的保存能力并且可以防止磁头被磨损。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式