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公开(公告)号：US07368189B2
公开(公告)日：2008-05-06
申请号：US11042064
申请日：2005-01-26
申请人： Mikio Ohno , Tatsuo Ishikawa , Tomohiro Ichikawa
发明人： Mikio Ohno , Tatsuo Ishikawa , Tomohiro Ichikawa
CPC分类号： B32B27/36 , B32B27/14 , B32B2307/20 , B32B2307/538 , B32B2429/02 , G11B5/70 , G11B5/7305 , G11B5/733 , G11B5/735 , Y10T428/31786
摘要： A magnetic recording medium comprising: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a back coat layer, in this order, wherein the nonmagnetic support contains polyester having an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, a surface of the magnetic layer on a side not having the nonmagnetic support has a surface roughness Ra of from 1 to 5 nm, and a surface of the back coat layer on a side not having the nonmagnetic support has a surface roughness Ra of from 6 to 20 nm.
摘要翻译： 一种磁记录介质，包括：含有铁磁粉末和粘合剂的磁性层; 非磁性支撑; 和背涂层，其中非磁性载体含有特性粘度为0.40至0.60dl / g，数均分子量为12,000至24,000的聚酯，磁性层的表面不在 具有非磁性载体的表面粗糙度Ra为1〜5nm，背面层的不具有非磁性载体的表面的表面粗糙度Ra为6〜20nm。
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公开(公告)号：US07349182B2
公开(公告)日：2008-03-25
申请号：US11049877
申请日：2005-02-04
申请人： Mikio Ohno , Tomohiro Ichikawa , Tatsuo Ishikawa
发明人： Mikio Ohno , Tomohiro Ichikawa , Tatsuo Ishikawa
IPC分类号： G11B5/78
CPC分类号： G11B5/73
摘要： A magnetic recording medium for being used in a write/read system in which a difference of track width between write track width and read track width is smaller than 10 μm, which comprises: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a backcoating layer, in this order, at least one of the magnetic layer and the backcoating layer having servo signals for tracking control pre-recorded therein, wherein the nonmagnetic support is a film of a polyester having an intrinsic viscosity of 0.40 to 0.60 dl/g and a number average molecular weight of 12000 to 24000.
摘要翻译： 一种用于写入/读取系统的磁记录介质，其中写入磁道宽度和读取磁道宽度之间的磁道宽度的差小于10um，其包括：包含铁磁性粉末和粘合剂的磁性层; 非磁性支撑; 和背涂层，其中磁性层和背涂层中的至少一个具有用于在其中预先记录的跟踪控制的伺服信号，其中非磁性载体是特性粘度为0.40至0.60dl的聚酯膜 / g，数均分子量为12000〜24000。
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公开(公告)号：US07381485B2
公开(公告)日：2008-06-03
申请号：US11049891
申请日：2005-02-04
申请人： Tatsuo Ishikawa , Mikio Ohno , Tomohiro Ichikawa
发明人： Tatsuo Ishikawa , Mikio Ohno , Tomohiro Ichikawa
CPC分类号： G11B5/70 , G11B5/7305 , G11B5/735 , Y10T428/31794
摘要： A magnetic recording tape comprising a nonmagnetic support and a magnetic layer containing ferromagnetic powder and a binder, wherein the nonmagnetic support has an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, and a distance between an apex of a maximum convexity and a valley of a maximum concavity of the nonmagnetic support on a cross section of an edge of the tape made by cutting the tape in a transverse direction is 2 μm or less in the transverse direction.
摘要翻译： 一种磁记录带，其包含非磁性载体和含有铁磁性粉末和粘合剂的磁性层，其中所述非磁性载体的特性粘度为0.40至0.60dl / g，数均分子量为12,000至24,000， 在通过沿横向方向切割带而制成的带的边缘的横截面上的非磁性载体的最大凹凸的顶点与最大凹部的谷之间的宽度在横向上为2μm或更小。
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公开(公告)号：US20050202289A1
公开(公告)日：2005-09-15
申请号：US11049891
申请日：2005-02-04
申请人： Tatsuo Ishikawa , Mikio Ohno , Tomohiro Ichikawa
发明人： Tatsuo Ishikawa , Mikio Ohno , Tomohiro Ichikawa
CPC分类号： G11B5/70 , G11B5/7305 , G11B5/735 , Y10T428/31794
摘要： A magnetic recording tape comprising a nonmagnetic support and a magnetic layer containing ferromagnetic powder and a binder, wherein the nonmagnetic support has an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, and a distance between an apex of a maximum convexity and a valley of a maximum concavity of the nonmagnetic support on a cross section of an edge of the tape made by cutting the tape in a transverse direction is 2 μm or less in the transverse direction.
摘要翻译： 一种磁记录带，其包含非磁性载体和含有铁磁性粉末和粘合剂的磁性层，其中所述非磁性载体的特性粘度为0.40至0.60dl / g，数均分子量为12,000至24,000， 在通过沿横向方向切割带而制成的带的边缘的横截面上的非磁性载体的最大凹凸的顶点与最大凹部的谷之间的宽度在横向上为2μm或更小。
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公开(公告)号：US20050175866A1
公开(公告)日：2005-08-11
申请号：US11049877
申请日：2005-02-04
申请人： Mikio Ohno , Tomohiro Ichikawa , Tatsuo Ishikawa
发明人： Mikio Ohno , Tomohiro Ichikawa , Tatsuo Ishikawa
CPC分类号： G11B5/73
摘要： A magnetic recording medium for being used in a write/read system in which a difference of track width between write track width and read track width is smaller than 10 μm, which comprises: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a backcoating layer, in this order, at least one of the magnetic layer and the backcoating layer having servo signals for tracking control pre-recorded therein, wherein the nonmagnetic support is a film of a polyester having an intrinsic viscosity of 0.40 to 0.60 dl/g and a number average molecular weight of 12000 to 24000.
摘要翻译： 一种用于写入/读取系统的磁记录介质，其中写入磁道宽度和读取磁道宽度之间的磁道宽度的差小于10um，其包括：包含铁磁粉末和粘合剂的磁性层; 非磁性支撑; 和背涂层，其中磁性层和背涂层中的至少一个具有用于在其中预先记录的跟踪控制的伺服信号，其中非磁性载体是特性粘度为0.40至0.60dl的聚酯膜 / g，数均分子量为12000〜24000。
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公开(公告)号：US20050170213A1
公开(公告)日：2005-08-04
申请号：US11042064
申请日：2005-01-26
申请人： Mikio Ohno , Tatsuo Ishikawa , Tomohiro Ichikawa
发明人： Mikio Ohno , Tatsuo Ishikawa , Tomohiro Ichikawa
IPC分类号： G11B5/64 , B32B27/36 , G11B5/70 , G11B5/73 , G11B5/733 , G11B5/735 , G11B5/738 , B32B1/00 , G11B5/68
CPC分类号： B32B27/36 , B32B27/14 , B32B2307/20 , B32B2307/538 , B32B2429/02 , G11B5/70 , G11B5/7305 , G11B5/733 , G11B5/735 , Y10T428/31786
摘要： A magnetic recording medium comprising: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a back coat layer, in this order, wherein the nonmagnetic support contains polyester having an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, a surface of the magnetic layer on a side not having the nonmagnetic support has a surface roughness Ra of from 1 to 5 nm, and a surface of the back coat layer on a side not having the nonmagnetic support has a surface roughness Ra of from 6 to 20 nm.
摘要翻译： 一种磁记录介质，包括：含有铁磁粉末和粘合剂的磁性层; 非磁性支撑; 和背涂层，其中非磁性载体含有特性粘度为0.40至0.60dl / g，数均分子量为12,000至24,000的聚酯，磁性层的表面不在 具有非磁性载体的表面粗糙度Ra为1〜5nm，背面层的不具有非磁性载体的表面的表面粗糙度Ra为6〜20nm。
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公开(公告)号：US07045227B2
公开(公告)日：2006-05-16
申请号：US10804145
申请日：2004-03-19
申请人： Tatsuo Ishikawa , Mikio Ohno
发明人： Tatsuo Ishikawa , Mikio Ohno
IPC分类号： G11B5/738
CPC分类号： G11B5/738 , G11B5/70 , G11B5/714 , G11B5/735 , Y10T428/31551
摘要： A magnetic recording medium comprising: a nonmagnetic support; an undercoat layer containing a compound polymerizable by radiation exposure; and a magnetic layer containing ferromagnetic powder and a binder, in this order wherein the undercoat layer has a thickness of from 0.1 to 1 μm, the binder contains a polyurethane resin having a glass transition temperature of from 100 to 200° C., the magnetic layer has a thickness of from 20 to 150 nm, and an average particle size of the ferromagnetic powder is from 20 to 60 nm.
摘要翻译： 一种磁记录介质，包括：非磁性载体; 含有通过辐射照射可聚合的化合物的底涂层; 和含有铁磁性粉末和粘合剂的磁性层，其中底涂层的厚度为0.1〜1μm，粘合剂含有玻璃化转变温度为100〜200℃的聚氨酯树脂，磁性 层的厚度为20〜150nm，铁磁性粉末的平均粒径为20〜60nm。
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公开(公告)号：US06991862B2
公开(公告)日：2006-01-31
申请号：US10810830
申请日：2004-03-29
申请人： Mikio Ohno , Tatsuo Ishikawa
发明人： Mikio Ohno , Tatsuo Ishikawa
IPC分类号： G11B5/702
CPC分类号： G11B5/7021 , G11B5/70 , G11B5/714
摘要： In one aspect, the magnetic recording medium comprises a magnetic layer comprising a ferromagnetic powder and a binder and said binder comprises polyurethane resin having a glass transition temperature of 100 to 200° C. In a second aspect, the magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support and at least the binder comprised in said magnetic layer comprises polyurethane resin having a glass transition temperature of 100 to 200° C. In both aspects, said magnetic layer has a thickness equal to or less than 0.15 μm, said ferromagnetic powder has a mean major axis length or a mean plate diameter of 60 nm or less, and said magnetic layer has a coercivity of 159 to 239 kA/m in a longitudinal or in-plane direction.
摘要翻译： 一方面，磁记录介质包括含有铁磁粉末和粘合剂的磁性层，所述粘合剂包含玻璃化转变温度为100-200℃的聚氨酯树脂。在第二方面，磁记录介质包括非磁性层 在非磁性载体上依次包含非磁性粉末和粘合剂以及包含铁磁粉末和粘合剂的磁性层，并且至少包含在所述磁性层中的粘合剂包含玻璃化转变温度为100-200℃的聚氨酯树脂。 在两个方面，所述磁性层具有等于或小于0.15μm的厚度，所述铁磁粉末具有平均长轴长度或60nm或更小的平均板直径，并且所述磁性层的矫顽力为159至239kA / m的纵向或平面方向。
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公开(公告)号：US5958565A
公开(公告)日：1999-09-28
申请号：US848596
申请日：1997-04-28
CPC分类号： G11B5/7305 , G11B5/70 , G11B5/733 , G11B5/735 , Y10S428/90 , Y10T428/24975 , Y10T428/25 , Y10T428/258 , Y10T428/265
摘要： A magnetic recording tape favorably employable for computer data storage has a flexible polymer web, a magnetic recording layer arranged on one surface side of the web, and a backing layer arranged on another surface side of the web, characterized in that the recording tape has a thickness of 2 to 8 .mu.m and shows a Young's modulus of not less than 1,200 kg/mm.sup.2 in its longitudinal direction; and the backing layer has a thickness of 0.2 to 1 .mu.m and is composed of a binder, a carbon black, a non-magnetic powder I having Mohs' scale of hardness of 3 to 4.5 and another non-magnetic powder II having Mohs' scale of hardness of 5 to 9. Between the magnetic layer and the flexible polymer web, a non-magnetic undercoating layer composed of a binder and a non-magnetic powder can be provided.
摘要翻译： 有利地用于计算机数据存储的磁记录带具有柔性聚合物网，布置在网的一个表面侧的磁记录层和布置在网的另一表面侧上的背衬层，其特征在于记录带具有 厚度为2〜8μm，纵向杨氏模量为1200kg / mm2以上。 背衬层的厚度为0.2〜1μm，由粘合剂，炭黑，莫氏硬度为3〜4.5的非磁性粉末I和具有Mohs' 在硬磁性层和柔性聚合物网之间，可以提供由粘合剂和非磁性粉末组成的非磁性底涂层。
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公开(公告)号：US5615803A
公开(公告)日：1997-04-01
申请号：US426845
申请日：1995-04-24
CPC分类号： B65D83/0055 , B65D35/22 , B65D81/3244
摘要： A tube container has an outer tube formed with an extruding mouth at one end and two inner tubes each formed with an extruding mouth at one end. The inner tubes are inserted into the outer tube, and the extruding mouths of the two inner tubes are secured to the extruding mouth of the outer tube, respectively, while the other ends of the two inner tubes and the other end of the outer tube are pressed and welded together to form a hermetically sealed portion. The outer tube has a transverse cross section taking the form of an ellipse or a closed running track shape, namely a shape combining two semicircles with two straight lines. The inner tubes are arranged in the outer tube in the direction of major axis of the transverse cross section of the outer tube. The other ends of the two inner tubes and the other end of the outer tube are pressed in the minor axis of the transverse cross section and welded together, wherein the respective hermetically sealed portions of the two inner tubes have a length more than half of the hermetically sealed portion of the outer tube, and a part of one inner tube and a part of the other inner tube lie one upon the other.
摘要翻译： 管容器具有在一端形成有挤出口的外管和两个在其一端形成有挤出口的内管。 内管插入外管，两根内管的挤出口分别固定在外管的挤压口上，而两根内管的另一端和外管的另一端分别为 压制并焊接在一起以形成气密密封部分。 外管具有呈椭圆形或闭合行进轨道形状的横截面，即将两个半圆与两条直线相结合的形状。 内管沿外管的横截面的长轴方向排列在外管内。 两个内管的另一端和外管的另一端被挤压在横截面的短轴上并焊接在一起，其中两个内管的相应气密部分的长度大于 外管的气密密封部分和一个内管的一部分和另一个内管的一部分一个放置在另一个上。
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