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公开(公告)号：US07208237B2
公开(公告)日：2007-04-24
申请号：US10823680
申请日：2004-04-14
摘要： The present invention provides a magnetic recording medium comprising a thin film magnetic layer of thickness in a range from 0.03 to 0.30 μm, and having excellent surface smoothness and superior electromagnetic conversion characteristics. The magnetic recording medium comprises a lower non-magnetic layer containing at least a non-magnetic powder and a binder resin on one surface of a non-magnetic support, an upper magnetic layer containing at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, and a back coat layer on the other surface of the non-magnetic support, wherein the thickness of the upper magnetic layer is within the range from 0.03 to 0.30 μm, the AFM surface roughness Ra of the upper magnetic layer is 6 nm or less, and the number of concavities with a depth of 30 nm or greater in the surface of the upper magnetic layer is 5 per 1 cm2 of surface area or less.
摘要翻译： 本发明提供一种磁记录介质，其包括厚度在0.03〜0.30μm范围内的薄膜磁性层，并且具有优异的表面平滑度和优异的电磁转换特性。 磁记录介质包括在非磁性载体的一个表面上至少含有非磁性粉末和粘合剂树脂的下部非磁性层，在下部的至少含有铁磁性粉末和粘合剂树脂的上部磁性层 非磁性层的非磁性层和背涂层，其中上磁性层的厚度在0.03〜0.30μm的范围内，上磁性层的AFM表面粗糙度Ra为 6nm以下，上磁性层的表面的深度为30nm以上的凹部的数量为每1cm 2以上的表面积以下。
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公开(公告)号：US07563522B2
公开(公告)日：2009-07-21
申请号：US11555897
申请日：2006-11-02
CPC分类号： G11B5/70 , G11B5/00813 , G11B5/714 , G11B5/738 , G11B5/78 , G11B2005/001 , Y10T428/12993
摘要： The present invention provides a magnetic recording medium comprising a magnetic layer with excellent surface smoothness, which comprises a thin film magnetic layer of thickness in a range from 0.03 to 0.30 μm that is ideal for short wavelength recording, and displays superior electromagnetic conversion characteristics. The magnetic recording medium comprises a magnetic layer containing at least a ferromagnetic powder and a binder resin on one surface of a non-magnetic support, wherein the thickness of the magnetic layer is within a range from 0.03 to 0.30 μm, and the number of concavities with a depth of 30 nm or greater in the surface of the magnetic layer is 5 per 1 cm2 of surface area or less. Preferably, the value of the average depth Rv6 of the surface of the magnetic layer, as measured by a contact type surface roughness meter, is 12 nm or less.
摘要翻译： 本发明提供一种包括具有优异表面平滑度的磁性层的磁记录介质，其包括厚度在0.03至0.30μm范围内的薄膜磁性层，这对于短波长记录是理想的，并且显示出优异的电磁转换特性。 磁记录介质包括在非磁性载体的一个表面上至少含有铁磁粉末和粘合剂树脂的磁性层，其中磁性层的厚度在0.03至0.30μm的范围内，并且凹部的数量 磁性层的表面的深度为30nm以上的表面积为1cm 2以下。 优选地，通过接触型表面粗糙度计测量的磁性层的表面的平均深度Rv6的值为12nm以下。
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公开(公告)号：US20070160876A1
公开(公告)日：2007-07-12
申请号：US11555897
申请日：2006-11-02
IPC分类号： G11B5/708
CPC分类号： G11B5/70 , G11B5/00813 , G11B5/714 , G11B5/738 , G11B5/78 , G11B2005/001 , Y10T428/12993
摘要： The present invention provides a magnetic recording medium comprising a magnetic layer with excellent surface smoothness, which comprises a thin film magnetic layer of thickness in a range from 0.03 to 0.30 μm that is ideal for short wavelength recording, and displays superior electromagnetic conversion characteristics. The magnetic recording medium comprises a magnetic layer containing at least a ferromagnetic powder and a binder resin on one surface of a non-magnetic support, wherein the thickness of the magnetic layer is within a range from 0.03 to 0.30 μm, and the number of concavities with a depth of 30 nm or greater in the surface of the magnetic layer is 5 per 1 cm2 of surface area or less. Preferably, the value of the average depth Rv6 of the surface of the magnetic layer, as measured by a contact type surface roughness meter, is 12 nm or less.
摘要翻译： 本发明提供一种包括具有优异表面平滑度的磁性层的磁记录介质，其包括厚度在0.03至0.30μm范围内的薄膜磁性层，这对于短波长记录是理想的，并且显示出优异的电磁转换特性。 磁记录介质包括在非磁性载体的一个表面上至少含有铁磁粉末和粘合剂树脂的磁性层，其中磁性层的厚度在0.03至0.30μm的范围内，并且凹部的数量 磁性层表面的深度为30nm以上的表面积为1cm 2以下。 优选地，通过接触型表面粗糙度计测量的磁性层的表面的平均深度Rv6的值为12nm以下。
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公开(公告)号：US07157163B2
公开(公告)日：2007-01-02
申请号：US10823564
申请日：2004-04-14
CPC分类号： G11B5/70 , G11B5/00813 , G11B5/714 , G11B5/738 , G11B5/78 , G11B2005/001 , Y10T428/12993
摘要： The present invention provides a magnetic recording medium comprising a magnetic layer with excellent surface smoothness, which comprises a thin film magnetic layer of thickness in a range from 0.03 to 0.30 μm that is ideal for short wavelength recording, and displays superior electromagnetic conversion characteristics. The magnetic recording medium comprises a magnetic layer containing at least a ferromagnetic powder and a binder resin on one surface of a non-magnetic support, wherein the thickness of the magnetic layer is within a range from 0.03 to 0.30 μm, and the number of concavities with a depth of 30 nm or greater in the surface of the magnetic layer is 5 per 1 cm2 of surface area or less. Preferably, the value of the average depth Rv6 of the surface of the magnetic layer, as measured by a contact type surface roughness meter, is 12 nm or less.
摘要翻译： 本发明提供一种包括具有优异表面平滑度的磁性层的磁记录介质，其包括厚度在0.03至0.30μm范围内的薄膜磁性层，这对于短波长记录是理想的，并且显示出优异的电磁转换特性。 磁记录介质包括在非磁性载体的一个表面上至少含有铁磁粉末和粘合剂树脂的磁性层，其中磁性层的厚度在0.03至0.30μm的范围内，并且凹部的数量 磁性层表面的深度为30nm以上的表面积为1cm 2以下。 优选地，通过接触型表面粗糙度计测量的磁性层的表面的平均深度Rv6的值为12nm以下。
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公开(公告)号：US07090936B2
公开(公告)日：2006-08-15
申请号：US10397845
申请日：2003-03-27
IPC分类号： G11B5/738
CPC分类号： G11B5/738 , G11B5/7026
摘要： The present invention provides a high recording density magnetic recording medium with excellent surface smoothness, as well as excellent electromagnetic conversion characteristics and durability. A magnetic recording medium comprising a lower non-magnetic layer containing at least a non-magnetic powder and a binder resin on a non-magnetic support, and an upper magnetic layer with a thickness of 0.2 μm or less on said lower non-magnetic layer, wherein said lower non-magnetic layer contains an acicular powder of hydrated iron oxide as the non-magnetic powder, and said lower non-magnetic layer contains a fatty acid and a fatty acid amide. Preferably the acicular powder of hydrated iron oxide is goethite with an average long axial length of 0.15 μm or less.
摘要翻译： 本发明提供了具有优异的表面光滑度以及优异的电磁转换特性和耐久性的高记录密度磁记录介质。 一种磁记录介质，包括在非磁性载体上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及在所述下部非磁性层上具有0.2μm或更小的厚度的上部磁性层 其中所述下部非磁性层含有作为非磁性粉末的水合氧化铁的针状粉末，所述下部非磁性层含有脂肪酸和脂肪酸酰胺。 优选地，水合氧化铁的针状粉末是具有0.15μm或更小的平均长轴向长度的针铁矿。
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公开(公告)号：US06777061B2
公开(公告)日：2004-08-17
申请号：US10397846
申请日：2003-03-27
IPC分类号： G11B5714
CPC分类号： G11B5/738 , G11B5/714 , G11B5/84 , Y10T428/1164 , Y10T428/1179 , Y10T428/25 , Y10T428/257 , Y10T428/265
摘要： The present invention provides a high recording density magnetic recording medium with improved dropout and excellent surface smoothness and electromagnetic conversion characteristics, as well as a process for producing such a medium. A magnetic recording medium comprising a lower non-magnetic layer containing at least a non-magnetic powder and a binder resin on one surface of a non-magnetic support, an upper magnetic layer containing at least a ferromagnetic powder and a binder resin on said lower non-magnetic layer, and a back coat layer on an opposite surface of said non-magnetic support, wherein said lower non-magnetic layer contains an acicular powder of hydrated iron oxide as the non-magnetic powder, said ferromagnetic powder has an average long axial length of 0.1 &mgr;m or less, and said upper magnetic layer has a surface roughness (center line average roughness: Ra) of 2.4 nm or less. After curing the lower non-magnetic layer, the magnetic layer is applied and formed.
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公开(公告)号：US07144643B2
公开(公告)日：2006-12-05
申请号：US10425659
申请日：2003-04-30
申请人： Kenichi Kitamura , Hiroyuki Yamada
发明人： Kenichi Kitamura , Hiroyuki Yamada
CPC分类号： G11B5/70
摘要： The invention provides a high performance magnetic recording medium used in the magnetic recording system using the MR head for the regeneration head, wherein the magnetic recording medium does not damage the MR head by direct sliding contact while having durability and self-cleaning power enough for preventing abrasion of the magnetic recording medium itself.
摘要翻译： 本发明提供了一种用于磁记录系统的高性能磁记录介质，其使用用于再生头的MR磁头，其中磁记录介质不会通过直接滑动接触而损坏MR磁头，同时具有足够的耐久性和自清洁能力以防止 磁记录介质本身的磨损。
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8.发明申请Electron beam curable urethane resin for magnetic recording medium, method of manufacturing the same and magnetic recording medium using the same 审中-公开用于磁记录介质的电子束可固化聚氨酯树脂，其制造方法和使用其的磁记录介质公开(公告)号：US20060115687A1
公开(公告)日：2006-06-01
申请号：US11268491
申请日：2005-11-08
IPC分类号： G11B5/706
CPC分类号： C09D175/16 , C08G18/8175 , Y10S428/90 , Y10T428/31551
摘要： An electron-beam curable polyurethane resin for magnetic recording media is produced by modifying a polyurethane resin having active hydrogen in the molecule thereof with a compound having at least two acrylic double bonds, wherein the modification is performed on the active hydrogen so that the polyurethane resin becomes electron-beam curable. By subjecting a known thermosetting polyurethane resin to electron-beam sensitive modification, the resulting resin is highly crosslinked and is thus capable of being suitably used for magnetic recording media. Also, an electron-beam curable polyurethane resin having excellent crosslinking characteristics can easily be produced from the known thermosetting polyurethane resin. Furthermore, by using the electron-beam curable polyurethane resin, a high-performance magnetic recording medium can be provided.
摘要翻译： 用于磁记录介质的电子束固化聚氨酯树脂通过用具有至少两个丙烯酸双键的化合物改性其分子中具有活性氢的聚氨酯树脂来制备，其中对活性氢进行改性，使得聚氨酯树脂 成为电子束固化。 通过使已知的热固性聚氨酯树脂进行电子束敏感改性，所得树脂高度交联，因此能够适用于磁记录介质。 此外，可以从已知的热固性聚氨酯树脂容易地制备具有优异交联特性的电子束固化性聚氨酯树脂。 此外，通过使用电子束固化性聚氨酯树脂，可以提供高性能的磁记录介质。
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9.发明授权Electron beam curable urethane resin for magnetic recording medium, method of manufacturing the same, and magnetic recording medium using the same 失效用于磁记录介质的电子束可固化聚氨酯树脂，其制造方法以及使用其的磁记录介质公开(公告)号：US07026371B2
公开(公告)日：2006-04-11
申请号：US10397169
申请日：2003-03-27
CPC分类号： C09D175/16 , C08G18/8175 , Y10S428/90 , Y10T428/31551
摘要： An electron-beam curable polyurethane resin for magnetic recording media is produced by modifying a polyurethane resin having active hydrogen in the molecule thereof with a compound having at least two acrylic double bonds, wherein the modification is performed on the active hydrogen so that the polyurethane resin becomes electron-beam curable. By subjecting a known thermosetting polyurethane resin to electron-beam sensitive modification, the resulting resin is highly crosslinked and is thus capable of being suitably used for magnetic recording media. Also, an electron-beam curable polyurethane resin having excellent crosslinking characteristics can easily be produced from the known thermosetting polyurethane resin. Furthermore, by using the electron-beam curable polyurethane resin, a high-performance magnetic recording medium can be provided.
摘要翻译： 用于磁记录介质的电子束固化聚氨酯树脂通过用具有至少两个丙烯酸双键的化合物改性其分子中具有活性氢的聚氨酯树脂来制备，其中对活性氢进行改性，使得聚氨酯树脂 成为电子束固化。 通过使已知的热固性聚氨酯树脂进行电子束敏感改性，所得树脂高度交联，因此能够适用于磁记录介质。 此外，可以从已知的热固性聚氨酯树脂容易地制备具有优异交联特性的电子束固化性聚氨酯树脂。 此外，通过使用电子束固化性聚氨酯树脂，可以提供高性能的磁记录介质。
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公开(公告)号：USPP25409P2
公开(公告)日：2015-04-07
申请号：US13986652
申请日：2013-05-21
申请人： Kenichi Kitamura
发明人： Kenichi Kitamura
IPC分类号： A01H5/00
CPC分类号： A01H5/02
摘要： A new and distinct cultivar of Mandevilla plant named ‘Sunparakitaho’, characterized by its upright and vining plant habit; vigorous growth habit; freely branching habit, dense and bushy plant form; glossy dark green-colored leaves; freely flowering habit; long flowering period; and medium-sized flowers with pale pink-colored flowers with yellow orange-colored throats.
摘要翻译： 一个新的和独特的Mandevilla植物的品种“Sunparakitaho”，其植物的习性直观而清晰; 生长习惯旺盛 自由分枝习性，密集和浓密的植物形式; 光泽深绿色的叶子; 自由开花的习惯; 开花期长 和中等大小的花朵，浅黄色的花朵，黄橙色的喉咙。
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