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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：US06338896B1
公开(公告)日：2002-01-15
申请号：US09280004
申请日：1999-03-29
IPC分类号： G11B5738
CPC分类号： G11B5/7305 , G11B5/738 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/31728
摘要： The present invention provides a magnetic recording medium, which comprises a magnetic layer having ferromagnetic powder dispersed in a binder on a non-magnetic support member, wherein the non-magnetic support member is made of aromatic polyamide, an undercoating layer is provided between said non-magnetic support member and a lower non-magnetic layer, or between the non-magnetic support member and the magnetic layer, said undercoating layer comprising polyamide resin having tertiary amino group and containing repeated structural units expressed by the following formulae (1) and (2).
摘要翻译： 本发明提供一种磁记录介质，其包括在非磁性支撑构件上分散有粘结剂的铁磁性粉末的磁性层，其中所述非磁性支撑构件由芳香族聚酰胺制成，底涂层设置在所述非磁性支撑构件之间， 磁性支撑构件和下部非磁性层，或者在非磁性支撑构件和磁性层之间，所述底涂层包含具有叔氨基的聚酰胺树脂，并且包含由下式（1）和（ 2）。
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10.发明授权
公开(公告)号：US4980115A
公开(公告)日：1990-12-25
申请号：US416023
申请日：1989-10-02
CPC分类号： B29C45/56 , B29C45/2669 , B29C2045/569 , B29C33/20
摘要： An injection molding method for molding a product having a partly thin portion comprising the steps of: providing a molding die including a slide block disposed in one of male and female dies and having in cross section a dimension corresponding to a dimension of the thin portion of the product; defining a cavity between the male and female dies with maintaining the slide block in a retracted position; injecting a molten resin material into the cavity through a gate; and advancing the slide block to project into the cavity before the resin material is solidified, thereby filling the cavity with the resin material while forming the thin portion.
摘要翻译： 一种用于模制具有部分薄部分的产品的注射成型方法，包括以下步骤：提供模制模具，其包括设置在阳模和阴模之一中的滑块，并且横截面的尺寸对应于薄部分的尺寸 产品; 在保持滑块处于缩回位置的同时，在阳模和阴模之间限定空腔; 通过浇口将熔融树脂材料注入腔体; 并且在树脂材料固化之前使滑动块推进到空腔中，从而在形成薄部分的同时用树脂材料填充空腔。
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