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1. 发明申请

US20060222906A1 Radiation curing polyurethane resin for magnetic recording medium, method of manufacturing radiation curing polyurethane resin for magnetic recording medium, and magnetic recording medium 审中-公开
标题翻译：用于磁记录介质的辐射固化聚氨酯树脂，用于磁记录介质的辐射固化聚氨酯树脂的制造方法和磁记录介质
公开(公告)号：US20060222906A1
公开(公告)日：2006-10-05
申请号：US11392786
申请日：2006-03-30
申请人： Hiroyuki Tanaka , Tsutomu Ide , Katsuhiko Yamazaki
发明人： Hiroyuki Tanaka , Tsutomu Ide , Katsuhiko Yamazaki
IPC分类号： G11B5/716
CPC分类号： C08G18/0828 , C08G18/8175 , C09D175/16 , G11B5/7021 , G11B5/73 , Y10T428/31551
摘要： A radiation curing polyurethane resin for a magnetic recording medium which is capable of realizing a lower non-magnetic layer that can secure sufficient coating film strength with a lower radiation dose. A polyurethane resin which contains active hydrogen, and a sulfur-containing polar group in an amount of not less than 0.05 mmol/g to not more than 0.10 mmol/g, inclusive, but does not contain a basic polar group in its molecule and is formed only by an aliphatic segment, is modified on the active hydrogen into a radiation curing polyurethane resin by a compound having an acrylic double bond.
摘要翻译：一种用于磁记录介质的辐射固化聚氨酯树脂，其能够实现能够以较低辐射剂量确保足够的涂膜强度的较低非磁性层。含有活性氢和含硫极性基团的聚氨酯树脂，其含量不小于0.05mmol / g至不超过0.10mmol / g，但在其分子中不含碱性极性基团，并且为仅由脂肪族链段形成，通过具有丙烯酸双键的化合物将活性氢改性为辐射固化聚氨酯树脂。

2. 发明授权

US07160481B2 Method for manufacturing magnetic paint, and magnetic recording medium 有权
标题翻译：磁性涂料的制造方法和磁记录介质
公开(公告)号：US07160481B2
公开(公告)日：2007-01-09
申请号：US10765139
申请日：2004-01-28
申请人： Katsuhiko Yamazaki , Tsutomu Ide , Hiroyuki Tanaka
发明人： Katsuhiko Yamazaki , Tsutomu Ide , Hiroyuki Tanaka
IPC分类号： G11B5/842
CPC分类号： G11B5/714 , G11B5/842 , H01F1/0027 , H01F1/44 , H01F41/16
摘要： A method for manufacturing magnetic paint is provided, wherein a dispersion condition is appropriately controlled to excellently disperse a magnetic powder composed of fine particles adaptable for a higher recording density, so that magnetic paint having excellent dispersibility can be prepared, and a magnetic recording medium having excellent surface roughness is provided. The magnetic paint is prepared by the step of subjecting a mixed solution containing at least a binder, a solvent, and a magnetic powder to a dispersion treatment with a dispersion device by the use of dispersion media through at least dispersion step, wherein the dispersion in the main dispersion step is carried out by the use of dispersion media having an average particle diameter y (mm) satisfying the relationship, which is represented by formula y≦0.01x, with the average maximum diameter x (nm) of the magnetic powder.
摘要翻译：提供一种制造磁性涂料的方法，其中适当地控制分散条件，以使由适合于较高记录密度的微粒组成的磁性粉末非常好地分散，从而可以制备具有优异分散性的磁性涂料，以及具有提供优异的表面粗糙度。该磁性涂料是通过至少分散步骤，通过使用分散介质使至少含有粘合剂，溶剂和磁性粉末的混合溶液用分散装置进行分散处理的步骤来制备的，其中分散体主分散步骤通过使用平均粒径y（mm）的分散介质进行，该分散介质满足由公式y <= 0.01x表示的关系，其中磁粉的平均最大直径x（nm）。

3. 发明授权

US07425378B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US07425378B2
公开(公告)日：2008-09-16
申请号：US10898232
申请日：2004-07-26
申请人： Katsuhiko Yamazaki , Tsutomu Ide , Takashi Handa , Akinori Nishizawa
发明人： Katsuhiko Yamazaki , Tsutomu Ide , Takashi Handa , Akinori Nishizawa
IPC分类号： G11B5/66
CPC分类号： G11B5/738
摘要： The present invention provides a magnetic recording medium which has a thin film magnetic layer considerably excellent in surface smoothness, and is excellent in electromagnetic conversion property. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 7 to 23 μg of PO43− ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 8 to 22 μg of Mg2+ ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium.
摘要翻译：本发明提供一种具有表面平滑性优异的薄膜磁性层的磁记录介质，并且电磁转换特性优异。一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，7至23杯PO 3 - 3 - 提取每10毫米3磁记录介质的下非磁性层的体积。一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，每10 mm 3提取8至22杯Mg 2+离子磁记录介质的下非磁性层的体积。

4. 发明授权

US07288210B2 Method for manufacturing magnetic paint, method for manufacturing non-magnetic paint and magnetic recording medium 有权
标题翻译：磁性涂料的制造方法，非磁性涂料和磁记录介质的制造方法
公开(公告)号：US07288210B2
公开(公告)日：2007-10-30
申请号：US11346320
申请日：2006-02-03
申请人： Katsuhiko Yamazaki , Tsutomu Ide
发明人： Katsuhiko Yamazaki , Tsutomu Ide
IPC分类号： B01F13/00 , B02C19/00 , G11B5/00
CPC分类号： C09D5/36 , C08J3/212 , G11B5/70 , G11B5/738
摘要： A method for manufacturing magnetic paint or non-magnetic paint, which can produce a magnetic recording medium having excellent surface smoothness by appropriately setting the condition of a dispersion process for improving the dispersibility of the paint, and a magnetic recording medium are provided. The magnetic paint or the non-magnetic paint is produced by performing a dispersion process of a mixed solution, in which a magnetic powder or a non-magnetic powder is mixed into a binder solution containing a binder and a solvent, with a medium dispersion device. The method includes the steps of adjusting the viscosity of the mixed solution to 1,500 cP or less on a BL type viscometer at 20 rpm basis, and performing a dispersion process with the medium dispersion device using dispersion media having an average particle diameter of 0.5 mm or less at a dispersion circumferential speed of 8 to 15 m/s.
摘要翻译：提供一种制造磁性涂料或非磁性涂料的方法，其可以通过适当地设定用于改善涂料分散性的分散方法的条件和磁记录介质来制备具有优异表面光滑度的磁记录介质。磁性涂料或非磁性涂料是通过将磁性粉末或非磁性粉末混合到含有粘合剂和溶剂的粘合剂溶液中的混合溶液的分散方法与中等分散装置。该方法包括在BL型粘度计上以20rpm为基准将混合溶液的粘度调节至1,500cP以下的步骤，并使用平均粒径为0.5mm的分散介质和介质分散装置进行分散处理，或较少的分散圆周速度为8至15m / s。

5. 发明申请

US20070231471A1 Method for manufacturing magnetic recording medium 审中-公开
标题翻译：磁记录介质的制造方法
公开(公告)号：US20070231471A1
公开(公告)日：2007-10-04
申请号：US11727326
申请日：2007-03-26
申请人： Katsuhiko Yamazaki , Tsutomu Ide
发明人： Katsuhiko Yamazaki , Tsutomu Ide
IPC分类号： B05D5/12
CPC分类号： G11B5/842
摘要： A method for manufacturing a magnetic recording medium is provided which has high recording density and which is less likely to cause problems of a magnetic tape such as inappropriate contact with a head, unstable running, and damage. A back-coat layer containing plate-like inorganic pigment (plate-like inorganic pigment-containing layer) is formed over a non-magnetic support to produce an intermediate product having the support and the back-coat layer. Then, the intermediate product is subjected to calendering between at least one pair of metal rolls.
摘要翻译：提供一种制造磁记录介质的方法，其具有高记录密度，并且不太可能引起诸如与头部不适当的接触，运行不稳定和损坏等磁带的问题。在非磁性载体上形成含有板状无机颜料（板状无机颜料含有层）的背涂层，制造具有载体和背涂层的中间产品。然后，使中间产品在至少一对金属辊之间进行压延。

6. 发明申请

US20060019127A1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US20060019127A1
公开(公告)日：2006-01-26
申请号：US10898232
申请日：2004-07-26
申请人： Katsuhiko Yamazaki , Tsutomu Ide , Takashi Handa , Akinori Nishizawa
发明人： Katsuhiko Yamazaki , Tsutomu Ide , Takashi Handa , Akinori Nishizawa
IPC分类号： G11B5/716
CPC分类号： G11B5/738
摘要： The present invention provides a magnetic recording medium which has a thin film magnetic layer considerably excellent in surface smoothness, and is excellent in electromagnetic conversion property. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 7 to 23 μg of PO43− ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 8 to 22 μg of Mg2+ ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium.
摘要翻译：本发明提供一种具有表面平滑性优异的薄膜磁性层的磁记录介质，并且电磁转换特性优异。一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，7至23杯PO 3 - 3 - 提取每10毫米3磁记录介质的下非磁性层的体积。一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，每10 mm 3提取8至22杯Mg 2+离子磁记录介质的下非磁性层的体积。

7. 发明申请

US20060124887A1 Method for manufacturing magnetic paint, method for manufacturing non-magnetic paint and magnetic recording medium 有权
标题翻译：磁性涂料的制造方法，非磁性涂料和磁记录介质的制造方法
公开(公告)号：US20060124887A1
公开(公告)日：2006-06-15
申请号：US11346320
申请日：2006-02-03
申请人： Katsuhiko Yamazaki , Tsutomu Ide
发明人： Katsuhiko Yamazaki , Tsutomu Ide
IPC分类号： H01F1/00
CPC分类号： C09D5/36 , C08J3/212 , G11B5/70 , G11B5/738
摘要： A method for manufacturing magnetic paint or non-magnetic paint, which can produce a magnetic recording medium having excellent surface smoothness by appropriately setting the condition of a dispersion process for improving the dispersibility of the paint, and a magnetic recording medium are provided. The magnetic paint or the non-magnetic paint is produced by performing a dispersion process of a mixed solution, in which a magnetic powder or a non-magnetic powder is mixed into a binder solution containing a binder and a solvent, with a medium dispersion device. The method includes the steps of adjusting the viscosity of the mixed solution to 1,500 cP or less on a BL type viscometer at 20 rpm basis, and performing a dispersion process with the medium dispersion device using dispersion media having an average particle diameter of 0.5 mm or less at a dispersion circumferential speed of 8 to 15 m/s.
摘要翻译：提供一种制造磁性涂料或非磁性涂料的方法，其可以通过适当地设定用于改善涂料分散性的分散方法的条件和磁记录介质来制备具有优异表面光滑度的磁记录介质。磁性涂料或非磁性涂料是通过将磁性粉末或非磁性粉末混合到含有粘合剂和溶剂的粘合剂溶液中的混合溶液的分散方法与中等分散装置。该方法包括在BL型粘度计上以20rpm为基准将混合溶液的粘度调节至1,500cP以下的步骤，并使用平均粒径为0.5mm的分散介质和介质分散装置进行分散处理，或较少的分散圆周速度为8至15m / s。

8. 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。

9. 发明授权

US06855414B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06855414B2
公开(公告)日：2005-02-15
申请号：US10629766
申请日：2003-07-30
申请人： Tsutomu Ide , Katsuhiko Yamazaki
发明人： Tsutomu Ide , Katsuhiko Yamazaki
IPC分类号： G11B5/735
CPC分类号： G11B5/735 , Y10T428/257
摘要： A magnetic recording medium comprises a back coat layer containing carbon black and alumina as non-magnetic powder. The relationship between the abrasivity (y) in microns of the back coat layer and the alumina content (x) parts by weight to 100 parts by weight of non-magnetic powder excluding alumina satisfies four equations y≦4.6x+12.2, y≧4.1x+10.8, y≧13, y≦17. The abrasivity is measured such that an edge of a prismatic Sendust bar is pushed perpendiculary onto the back coat layer such that the magnetic recording medium is pressed at an approaching angle of 12 degree, and the magnetic recording medium is supported by a tension of 0.526 N/cm per unit width and a 50-m length thereof is moved back and forth one time over the Sendust bar at a running speed of 0.3 m/s.
摘要翻译：磁记录介质包括含有炭黑和氧化铝作为非磁性粉末的背涂层。背涂层的研磨性（y）与氧化铝含量（x）重量份之间的关系与100重量份除氧化铝之外的非磁性粉末的关系满足四个等式y <= 4.6x + 12.2，y> = 4.1x + 10.8，y> = 13，y <= 17。测量磨损性，使得棱柱形塞浦路斯棒的边缘被垂直地推到背涂层上，使得磁记录介质以接近的角度12度被压制，并且磁记录介质由0.526N的张力支撑 / cm，长度为50μm的长度在0.3m / s的运行速度下在Sendust杆上前后移动一次。

10. 发明申请

US20080145710A1 MAGNETIC RECORDING MEDIUM 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20080145710A1
公开(公告)日：2008-06-19
申请号：US11958036
申请日：2007-12-17
申请人： Takayoshi KUWAJIMA , Katsuhiko Yamazaki
发明人： Takayoshi KUWAJIMA , Katsuhiko Yamazaki
IPC分类号： G11B5/66
CPC分类号： G11B5/70 , G11B5/73 , G11B5/735
摘要： The present invention provides a high-capacity magnetic recording medium which has a thinned back coat layer excellent in surface smoothness and durability and is excellent in electromagnetic conversion property. A magnetic recording medium comprising at least a non-magnetic support, a lower non-magnetic layer on one surface of the non-magnetic support, an upper magnetic layer on the lower non-magnetic layer, and a back coat layer on the other surface of the non-magnetic support, wherein the lower non-magnetic layer contains at least carbon black, a non-magnetic inorganic powder other than carbon black, and a binder resin material, the upper magnetic layer contains at least a ferromagnetic powder, and a binder resin material, and the back coat layer contains at least carbon black, a non-magnetic inorganic powder other than carbon black, a phosphate amine salt, and nitrocellulose resin as a binder resin material, and has a thickness of 0.3 to 0.8 μm.
摘要翻译：本发明提供一种具有优异的表面平滑性和耐久性并且电磁转换性优异的薄的背涂层的高容量磁记录介质。一种磁记录介质，其至少包括非磁性载体，在非磁性载体的一个表面上的下部非磁性层，在下部非磁性层上的上部磁性层，和在另一个表面上的背涂层的非磁性载体，其中所述下部非磁性层至少含有炭黑，除了炭黑以外的非磁性无机粉末和粘合剂树脂材料，所述上部磁性层至少含有铁磁性粉末，粘合剂树脂材料，背涂层至少含有炭黑，除了炭黑以外的非磁性无机粉末，磷酸胺盐和硝酸纤维素树脂作为粘合剂树脂材料，其厚度为0.3〜0.8μm。

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