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21. 发明申请

US20060210839A1 Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20060210839A1
公开(公告)日：2006-09-21
申请号：US11374061
申请日：2006-03-14
申请人： Tsutomu Ide , Katsuhiko Yamazaki , Tomoyuki Kotaki , Sadafumi Iijima
发明人： Tsutomu Ide , Katsuhiko Yamazaki , Tomoyuki Kotaki , Sadafumi Iijima
IPC分类号： G11B5/716
CPC分类号： G11B5/7013 , G11B5/73
摘要： A magnetic recording medium which makes it possible to further increase the recording capacity while maintaining a required flexibility thereof. A magnetic tape has a lower non-magnetic layer and a magnetic layer formed on one surface of a base film in the mentioned order. The lower non-magnetic layer is formed of a non-magnetic coating material containing a non-magnetic powder, an electron beam curing binder, a dispersant having an amine group, and a thermosetting agent.
摘要翻译：一种磁记录介质，其可以进一步提高记录容量，同时保持其所需的柔性。磁带具有较低的非磁性层和以所述顺序形成在基膜的一个表面上的磁性层。下部非磁性层由含有非磁性粉末，电子束固化粘合剂，具有胺基的分散剂和热固化剂的非磁性涂料形成。

22. 发明申请

US20060172156A1 Magnetic recording medium and process for producing same 审中-公开
标题翻译：磁记录介质及其制造方法
公开(公告)号：US20060172156A1
公开(公告)日：2006-08-03
申请号：US11335122
申请日：2006-01-19
申请人： Katsunori Maeshima , Masaru Terakawa , Noboru Sekiguchi , Takeshi Akasaka , Yuichi Masuzawa
发明人： Katsunori Maeshima , Masaru Terakawa , Noboru Sekiguchi , Takeshi Akasaka , Yuichi Masuzawa
IPC分类号： G11B5/716
CPC分类号： G11B5/842 , G11B5/70
摘要： A magnetic recording medium includes a non-magnetic supporter; a lower non-magnetic layer containing at least inorganic particles and a binder resin; and a magnetic layer containing at least a magnetic powder and a binder resin and having a thickness of 100 nm or less, the lower non-magnetic layer and the magnetic layer being laminated on a main surface of the non-magnetic supporter, wherein the magnetic layer is formed by a process including applying a paint for forming the lower non-magnetic layer; drying the applied paint; and applying a magnetic paint while the lower non-magnetic layer is kept in a film state after drying.
摘要翻译：磁记录介质包括非磁性支持体; 至少含有无机颗粒和粘合剂树脂的下层非磁性层; 以及至少含有磁性粉末和粘合剂树脂并且具有100nm以下的厚度的磁性层，所述下部非磁性层和所述磁性层被层压在所述非磁性支撑体的主表面上，其中所述磁性层通过包括涂覆用于形成下部非磁性层的涂料的方法形成; 干燥涂料; 并且在干燥后将下部非磁性层保持在膜状态下施加磁性涂料。

23. 发明申请

US20060093869A1 Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20060093869A1
公开(公告)日：2006-05-04
申请号：US11266186
申请日：2005-11-04
申请人： Katsuhiko Meguro , Masatoshi Takahashi
发明人： Katsuhiko Meguro , Masatoshi Takahashi
IPC分类号： G11B5/716
CPC分类号： G11B5/73 , G11B5/7026 , G11B5/70678 , G11B5/7305
摘要： A magnetic recording medium is provided that comprises a non-magnetic support and, in order above at least one surface thereof, a reinforcing layer comprising at least one material selected from the group consisting of metals, metalloids, and alloys, and oxides and composites thereof, a smoothing layer, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder.
摘要翻译：提供一种磁记录介质，其包括非磁性载体，并且在其至少一个表面上依次包括选自金属，准金属和合金中的至少一种材料的增强层及其氧化物及其复合材料平滑层，以及包含分散在粘合剂中的铁磁性粉末的磁性层。

24. 发明申请

US20060019128A1 Magnetic recording medium and method for evaluating magnetic recording medium 审中-公开
标题翻译：磁记录介质和评估磁记录介质的方法
公开(公告)号：US20060019128A1
公开(公告)日：2006-01-26
申请号：US10895846
申请日：2004-07-22
申请人： Hiroyuki Tanaka , Takashi Handa , Tomoyuki Kotaki
发明人： Hiroyuki Tanaka , Takashi Handa , Tomoyuki Kotaki
IPC分类号： G11B5/716 , G01R33/00
CPC分类号： G11B5/70 , G11B5/714
摘要： A magnetic recording medium which has a thin film magnetic layer considerably excellent in surface smoothness and is excellent in electromagnetic conversion property is provided. A method for evaluating the surface smoothness of a magnetic recording medium is also provided. A magnetic recording medium comprising: a non-magnetic support; a non-magnetic layer which is on one surface of the non-magnetic support and comprises at least carbon black, a non-magnetic-powder other than the carbon black and a binder resin; and a magnetic layer which is on the non-magnetic layer and comprises at least a ferromagnetic powder and a binder resin, wherein when the shape of irregularities of the surface of the magnetic layer is subjected to Fourier transformation to obtain the power spectrum density (PSD) in the longitudinal direction of the magnetic recording medium, the power spectrum density L2 at a wavelength 2λ in the longitudinal direction, wherein λ (μm) represents the shortest recording wavelength of a recording and reproducing device for the magnetic recording medium, is 6.0×10−6 nm2mm or less. A magnetic recording medium, wherein when the power spectrum density (PSD) in the width direction of the magnetic recording medium is obtained, the power spectrum density W2 at a wavelength 2λ in the width direction, wherein λ (μm) represents the shortest recording wavelength of a recording and reproducing device for the magnetic recording medium, is 3.5×10−6 nm2mm or less.
摘要翻译：提供了具有表面平滑性优异且电磁转换特性优异的薄膜磁性层的磁记录介质。还提供了用于评估磁记录介质的表面平滑度的方法。一种磁记录介质，包括：非磁性载体; 非磁性层，其在所述非磁性载体的一个表面上并且至少包含炭黑，除了所述炭黑以外的非磁性粉末和粘合剂树脂; 以及磁性层，其位于非磁性层上并且至少包含铁磁性粉末和粘合剂树脂，其中当磁性层的表面的不规则形状进行傅里叶变换以获得功率谱密度（PSD ）在纵向方向上的波长为2λ的功率谱密度L 2 2，其中λ（mum）表示记录和再现装置的最短记录波长，用于磁记录介质为6.0×10 -6〜2×2mm以下。一种磁记录介质，其中当获得在磁记录介质的宽度方向上的功率谱密度（PSD）时，在宽度方向的波长为2λ的功率谱密度W 2 2，其中λ （mum）表示用于磁记录介质的记录和再现装置的最短记录波长，是3.5×10 -6 nm 2或以下。

25. 发明申请

US20060008681A1 Magnetic recording medium 有权
公开(公告)号：US20060008681A1
公开(公告)日：2006-01-12
申请号：US11175170
申请日：2005-07-07
申请人： Hiroshi Hashimoto , Yuichiro Murayama
发明人： Hiroshi Hashimoto , Yuichiro Murayama
IPC分类号： G11B5/716
CPC分类号： G11B5/7013 , G11B5/7021 , G11B5/714 , G11B5/738 , Y10T428/31609
摘要： A magnetic recording medium is provided that includes a support and at least one magnetic layer provided on or above the support, the magnetic layer including a ferromagnetic powder dispersed in a binder and at least one type of compound selected from Formulae (I) to (III) below; (in Formulae (I) to (III), each R independently denotes an alkyl group having 1 to 20 carbons).

26. 发明申请

US20050266277A1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US20050266277A1
公开(公告)日：2005-12-01
申请号：US11138409
申请日：2005-05-27
申请人： Mikio Tomaru , Masatoshi Takahashi , Hiroshi Hashimoto
发明人： Mikio Tomaru , Masatoshi Takahashi , Hiroshi Hashimoto
IPC分类号： G11B5/70 , G11B5/702 , G11B5/738 , G11B5/842 , G11B5/716
CPC分类号： G11B5/738 , G11B5/70 , G11B5/7026 , G11B5/842 , Y10T428/31786
摘要： A magnetic recording medium comprising a support having provided thereon a magnetic layer, wherein a smooth coating layer having a thickness of from 0.10 to 1 μm, surface roughness of 5 nm or less, and 20 or less per 900 μm2 of the protrusions having a height of 20 nm or more measured by an interatomic force microscope (AFM) is provided on the surface of at least one side of the support. And a method for producing a magnetic recording medium comprising a support having provided thereon a magnetic layer, which comprises providing a smooth coating layer having a thickness of from 0.10 to 1 μm, surface roughness of 5 nm or less, and 20 or less per 900 μm2 of the protrusions having a height of 20 nm or more measured by an interatomic force microscope (AFM) on the surface of at least one side of the support, and forming at least the magnetic layer on the smooth coating layer without performing rolling-up operation.
摘要翻译：一种磁记录介质，包括在其上设置有磁性层的支撑体，其中厚度为0.10至1μm，表面粗糙度为5nm或更小的平滑涂层以及每900μm2的20μm或更小的光滑涂层，通过原子力显微镜（AFM）测量的具有20nm或更高的高度的突起的SUP>提供在支撑体的至少一侧的表面上。以及一种用于制造磁记录介质的方法，所述磁记录介质包括其上设置有磁性层的载体，其包括提供厚度为0.10-1μm的光滑涂层，表面粗糙度为5nm以下，每900个为20个以下通过原子力显微镜（AFM）在支撑体的至少一侧的表面上测量的具有20nm或更高的高度的突起的2μm以上，并且至少在该支撑体的至少一个面上形成磁性层光滑的涂层，不进行卷起操作。

27. 发明申请

US20050260456A1 Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20050260456A1
公开(公告)日：2005-11-24
申请号：US11132405
申请日：2005-05-19
申请人： Kazuko Hanai , Ayako Matsumoto
发明人： Kazuko Hanai , Ayako Matsumoto
IPC分类号： C08J7/04 , G11B5/70 , G11B5/716 , G11B5/73 , G11B5/738
CPC分类号： G11B5/7305 , G11B5/733
摘要： A magnetic recording medium comprising: a nonmagnetic support; and a magnetic layer containing ferromagnetic powder and a binder, wherein the nonmagnetic support contains polyester, the nonmagnetic support has gauche/trans peak intensity ratio of 0.50 or less as determined by a ATR-FT-IR method, and a shrinkage percentage of the magnetic recording medium after storage for 1 week under a conditions of 70° C. and 5% RH is 0.040% or less.
摘要翻译：一种磁记录介质，包括：非磁性载体; 以及含有铁磁性粉末和粘合剂的磁性层，其中，所述非磁性载体含有聚酯，所述非磁性载体具有通过ATR-FT-IR法测定的0.50或更小的gauche /反式峰强度比，并且磁性收缩率在70℃，5％RH的条件下保存1周后的记录介质为0.040％以下。

28. 发明授权

US06936340B2 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06936340B2
公开(公告)日：2005-08-30
申请号：US09826901
申请日：2001-04-06
申请人： Helmut Jakusch , Albert Kohl , Peter Heilmann , Ronald John Veitch , Ria Kress , Stefan Müller , Johannes Sandrock , Hartmut Heene
发明人： Helmut Jakusch , Albert Kohl , Peter Heilmann , Ronald John Veitch , Ria Kress , Stefan Müller , Johannes Sandrock , Hartmut Heene
IPC分类号： G11B5/667 , G11B5/70 , G11B5/706 , G11B5/708 , G11B5/712 , G11B5/714 , G11B5/716 , G11B5/842 , B32B5/16 , G11B5/66
CPC分类号： G11B5/70678 , G11B5/70652 , G11B5/708 , G11B5/716 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/26 , Y10T428/265 , Y10T428/269
摘要： Multilayer magnetic recording medium which is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties and good surface smoothness and can absorb a large amount of lubricant in the lower layer and has at least one upper magnetic recording layer less than 0.5 μm thick and at least one lower layer which contains a magnetically soft pigment.
摘要翻译：适用于高记录密度和数字数据记录的多层磁记录介质具有非常好的电磁记录性能和良好的表面平滑度，并且能够在下层吸收大量的润滑剂，并且具有至少一个上磁记录层超过0.5μm厚，以及至少一个含有软质软质颜料的下层。

29. 发明申请

US20050186451A1 Magnetic recording medium 失效
公开(公告)号：US20050186451A1
公开(公告)日：2005-08-25
申请号：US11117850
申请日：2005-04-29
申请人： Atsushi Kato , Naoyuki Numata , Junji Kagawa
发明人： Atsushi Kato , Naoyuki Numata , Junji Kagawa
IPC分类号： G11B5/706 , G11B5/716 , G11B5/17
CPC分类号： G11B5/716 , Y10T428/24942 , Y10T428/256
摘要： The present invention provides a magnetic recording medium which can record both digital and analog signals by, e.g., VTR for commercial use and improve their electromagnetic conversion characteristics. A magnetic recording medium comprises a nonmagnetic support, and first and second magnetic layers comprised respectively of magnetic powder (A) and (B), wherein the first and second magnetic layers are formed on the nonmagnetic support in this order, wherein the magnetic powder (A) and (B) have the following characteristics: saturation magnetization σs(A) 80 to 150 Am2/kg; coercive force Hc(A) 90 to 180 kA/m, saturation magnetization σs(B)100 to 200 Am2/kg, coercive force Hc(B)100 to 200 kA/m, wherein the first and second magnetic layers satisfy the below relationships and have thickness T(A) and T(B) in the below ranges: σs(A)/σs(B)≦1.0, Hc(A)/Hc(B)≦1.0, 1.0 μm≦T(A)≦4.0 μm, 0.01 μm≦T(B)≦0.5 μm.

30. 发明授权

US6103340A Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US6103340A
公开(公告)日：2000-08-15
申请号：US150924
申请日：1998-09-10
申请人： Hiroki Kubo , Hideyuki Kobayashi , Kazutaka Yamashita
发明人： Hiroki Kubo , Hideyuki Kobayashi , Kazutaka Yamashita
IPC分类号： C09D5/23 , G11B5/70 , G11B5/716 , G11B5/738
CPC分类号： G11B5/738 , G11B5/70 , G11B5/716 , Y10S428/90 , Y10T428/24355 , Y10T428/24975 , Y10T428/25 , Y10T428/256
摘要： A magnetic recording medium comprising a nonmagnetic substrate having provided thereon an intermediate layer consisting essentially of magnetic powder having a Mohs hardness of not less than 3 and an average particle size of not greater than 0.5 .mu.m and/or nonmagnetic powder having a Mohs hardness of not less than 3, carbon black, and a binder and, as a top layer, a magnetic layer consisting essentially of ferromagnetic metal powder and a binder, in which said magnetic layer has an average center-line surface roughness (Ra) of not greater than 7 nm, and said magnetic layer has an average center-line surface roughness (Ra) of 10 to 30 nm after being immersed in a hydrochloric acid aqueous solution for 24 hours.
摘要翻译：一种磁记录介质，包括非磁性基底，其上设置有基本上由莫氏硬度不小于3的磁性粉末和平均粒径不大于0.5μm的中间层和/或具有莫氏硬度的非磁性粉末不小于3的炭黑和粘合剂，并且作为顶层，基本上由铁磁金属粉末和粘合剂组成的磁性层，其中所述磁性层的平均中心线表面粗糙度（Ra）不大于并且所述磁性层在浸渍在盐酸水溶液中24小时后的平均中心线表面粗糙度（Ra）为10〜30nm。

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