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公开(公告)号：US07960045B2
公开(公告)日：2011-06-14
申请号：US12239937
申请日：2008-09-29
CPC分类号： G11B5/7305 , G11B5/8404 , Y10T428/31855
摘要： An aspect of the present invention relates to a magnetic recording medium comprising a coating layer on a nonmagnetic support, wherein the coating layer 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, the nonmagnetic support comprises a main component in the form of a resin obtained by mixing and/or copolymerizing a polyester and a polymer having compatibility with the polyester, has a glass transition temperature of equal to or higher than 80° C. but less than 125° C., and has a heat absorption peak, based on enthalpy relaxation, ranging from 0.5 to 2.0 J/g. Another aspect of the present invention relates to a method of manufacturing a magnetic recording medium.
摘要翻译： 本发明的一个方面涉及一种磁性记录介质，其包括在非磁性载体上的涂层，其中所述涂层包括非磁性层，包括非磁性粉末和粘合剂，以及包含铁磁性粉末和粘合剂的磁性层按此顺序 ，非磁性载体包括通过将聚酯和与聚酯具有相容性的聚合物混合和/或共聚获得的树脂形式的主要组分，其玻璃化转变温度等于或高于80℃但小于 125℃，基于焓弛豫，具有0.5〜2.0J / g的吸热峰。 本发明的另一方面涉及一种制造磁记录介质的方法。
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公开(公告)号：US20070230054A1
公开(公告)日：2007-10-04
申请号：US11727942
申请日：2007-03-29
IPC分类号： G11B5/78
CPC分类号： G11B5/70 , G11B5/73 , G11B5/7305 , G11B5/78
摘要： A magnetic tape including: a nonmagnetic support; a substantially nonmagnetic layer containing nonmagnetic powder and a binder; and a magnetic layer containing ferromagnetic powder and a binder, in this order, wherein the magnetic tape has a coefficient of temperature expansion of from 0 to 10×10−6/° C. and a coefficient of humidity expansion of 0 to 7×10−6/% RH each in a transverse direction of the magnetic tape, and the magnetic tape has a dimensional deformation amount of from 0.01 to 0.06% in the transverse direction in case of applying a tensile stress of 1N to the magnetic tape at 60° C. for 50 hours in a longitudinal direction of the magnetic tape.
摘要翻译： 一种磁带，包括：非磁性载体; 包含非磁性粉末和粘合剂的基本上非磁性层; 以及包含铁磁粉末和粘合剂的磁性层，其中磁带的温度膨胀系数为0至10×10 -6 /℃，并且湿度膨胀系数 0〜7×10 -6 /％RH，并且在施加张力的情况下，磁带在横向上的尺寸变形量为0.01〜0.06％ 在磁带的长度方向上，在60℃下对磁带施加1N的应力50小时。
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公开(公告)号：US20070224458A1
公开(公告)日：2007-09-27
申请号：US11727262
申请日：2007-03-26
IPC分类号： G11B5/708
CPC分类号： G11B5/714 , G11B5/7305
摘要： The present invention provides a magnetic recording medium having a magnetic layer formed on at least one surface of a nonmagnetic support, wherein the magnetic layer includes a ferrite ferromagnetic hexagonal powder having an average plate diameter of 5 to 50 nm or a fine ferromagnetic metal powder having an average major axis length of 20 to 100 nm together with a binder, and the nonmagnetic support is a composition of a polyester or copolyester having one or more of polytrimethylene 2,6-naphthalate, polytetramethylene 2,6-naphthalate, polypentamethylene 2,6-naphthalate and polyhexamethylene 2,6-naphthalate, in order to provides an excellent running stability, low error rates under various environment and an excellent electromagnetic transforming properties and reliability.
摘要翻译： 本发明提供一种具有在非磁性载体的至少一个表面上形成的磁性层的磁记录介质，其中磁性层包括平均板直径为5至50nm的铁氧体铁磁性六角形粉末或具有 平均长轴长度为20〜100nm，粘结剂为非磁性载体，是具有一个或多个2,6-萘二甲酸二亚甲基酯，聚2,6-萘二甲酸丁二醇酯，聚2,6-萘二甲酸丁二醇酯等聚酯或共聚酯的组合物 - 萘二甲酸乙二醇酯和2,6-萘二甲酸聚萘二甲酸酯，以提供良好的运行稳定性，各种环境下的低误差率和优异的电磁转换性能和可靠性。
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公开(公告)号：US20060083954A1
公开(公告)日：2006-04-20
申请号：US11249490
申请日：2005-10-14
IPC分类号： G11B5/706
CPC分类号： G11B5/7305 , G11B5/70678 , G11B5/714
摘要： A magnetic recording medium comprising a non-magnetic support and at least one magnetic layer containing a ferromagnetic powder and a binder, wherein the non-magnetic support has an intrinsic viscosity of from 0.46 to 0.58 dl/g and a refractive index in a direction of a depth within a range from 1.490 to 1.500.
摘要翻译： 一种包含非磁性载体和至少一个含有铁磁粉末和粘合剂的磁性层的磁记录介质，其中非磁性载体的特性粘度为0.46至0.58dl / g，折射率在 深度范围从1.490到1.500。
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公开(公告)号：US20050170217A1
公开(公告)日：2005-08-04
申请号：US11043966
申请日：2005-01-28
CPC分类号： G11B5/7305 , G11B5/714 , G11B5/733
摘要： A magnetic recording medium is composed of a nonmagnetic support provided with on one side of the support a magnetic layer containing a ferromagnetic powder and a binder, and a backing layer on the other side of the nonmagnetic support, wherein the nonmagnetic support is a polyester film having an intrinsic viscosity of from 0.40 to 0.60 dl/g, and contains fillers having filler diameters of from 10 to 500 nm at a filler density of from 1/100 to 50/100 μm2.
摘要翻译： 磁记录介质由非磁性载体构成，其在载体的一侧上设有含有铁磁性粉末和粘合剂的磁性层，在非磁性载体的另一侧上形成背衬层，其中非磁性载体为聚酯膜 其特性粘度为0.40至0.60dl / g，并且在填料密度为1/100至50/100μm2的范围内包含填料直径为10至500nm的填料。
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公开(公告)号：US06855412B2
公开(公告)日：2005-02-15
申请号：US10413369
申请日：2003-04-15
CPC分类号： G11B5/7305 , G11B5/70678 , Y10T428/251 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/2991
摘要： Provided is a particulate magnetic recording medium for high-density recording having a low error rate and good running durability. 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 at least one surface of a nonmagnetic support. Said nonmagnetic support comprises a clay mineral coated with an organic material, and said ferromagnetic powder is a ferromagnetic hexagonal ferrite powder having an average plate diameter ranging from 5 to 40 nm or a ferromagnetic metal powder having an average major axis length ranging from 20 to 100 nm.
摘要翻译： 提供了一种具有低误码率和良好运行耐久性的用于高密度记录的微粒磁记录介质。 磁记录介质包括非磁性层，其包含非磁性粉末和粘合剂，以及磁性层，其包含铁磁粉末和粘合剂，其顺序在非磁性载体的至少一个表面上。 所述非磁性载体包括涂覆有有机材料的粘土矿物，所述铁磁性粉末是平均板直径为5至40nm的铁磁性六角铁氧体粉末或平均长轴长度为20至100的强磁性金属粉末 nm。
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公开(公告)号：US06224967B1
公开(公告)日：2001-05-01
申请号：US09082730
申请日：1998-05-21
IPC分类号： G11B5702
CPC分类号： G11B5/7021 , G11B5/7022 , G11B5/70621 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/31609
摘要： The present invention provides a magnetic recording medium having high electromagnetic transfer characteristics and good running durability, whereby a polyester polyol comprising an aliphatic dibasic acid and an aliphatic diol component having no cyclic structure is used as a binder, and a polyurethane is contained, which comprises a polyester polyol having an aliphatic diol where 70 mol % or more of the aliphatic diol has alkyl branched side chain having 2 or more carbon atoms, and said polyurethane has urethane group concentration of 3.0 to 4.0 mmol/g, and said ferromagnetic powder has iron with yttrium at a yttrium/iron ratio of 0.5 to 20 atomic % as a major component.
摘要翻译： 本发明提供具有高电磁转移特性和良好的运行耐久性的磁记录介质，由此使用包含脂族二元酸和不具有环状结构的脂族二醇组分的聚酯多元醇作为粘合剂，并且包含聚氨酯，其包含 具有脂肪族二醇的聚酯多元醇，其中70摩尔％以上的脂肪族二醇具有碳原子数2以上的烷基支链侧链，所述聚氨酯的氨基甲酸酯基浓度为3.0〜4.0摩尔/克，所述铁磁粉末为铁 钇/铁比为0.5〜20原子％的钇为主要成分。
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8.发明授权Magnetic recording medium having a magnetic layer with a specified surface roughness and which contains ferromagnetic powder, binder, and an abrasive 失效磁记录介质具有特定表面粗糙度的磁性层，并含有铁磁粉末，粘合剂和研磨剂
公开(公告)号：US5512350A
公开(公告)日：1996-04-30
申请号：US441009
申请日：1995-05-15
申请人： Katsumi Ryoke , Katsuhiko Meguro , Hiroaki Doushita , Masaki Suzuki , Toshiyuki Kitahara , Masami Sato
发明人： Katsumi Ryoke , Katsuhiko Meguro , Hiroaki Doushita , Masaki Suzuki , Toshiyuki Kitahara , Masami Sato
CPC分类号： G11B5/7085 , G11B5/84 , Y10T428/24355 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium comprises a magnetic layer containing a ferromagnetic powder, a binder and an abrasive material having a Mohs hardness of 8 or more on a non-magnetic support, wherein the average protrusion height, which represents the length between the central line of the surface roughness of the sectional curve of the magnetic layer and the upper end of the abrasive material existing (i) above the central line of the surface roughness of the magnetic layer and (ii) in the surface layer of the magnetic layer, is 15 nm or less. A process for preparing the magnetic recording medium comprises coating on a non-magnetic support a magnetic layer containing a ferromagnetic powder, a binder and an abrasive material having a Mohs hardness of 8 or more, and then polishing the surface of the magnetic layer with an abrasive tape, wherein as the abrasive tape there is used one containing at least one abrasive material having a higher Mohs hardness than the abrasive material to be incorporated in the magnetic layer.
摘要翻译： 磁记录介质包括在非磁性载体上含有铁磁粉末，粘结剂和莫氏硬度为8或更高的研磨材料的磁性层，其中平均突出高度代表 磁性层和磁性层的表面粗糙度的中心线上方存在的（i）磁性层的截面曲线的表面粗糙度和（ii）在磁性层的表面层中的表面粗糙度为15nm 或更少。 制备磁记录介质的方法包括在非磁性载体上涂覆含有铁磁粉末，粘合剂和莫氏硬度为8或更高的研磨材料的磁性层，然后用 研磨带，其中作为研磨带，使用含有至少一种摩擦硬度高于被加入磁性层的研磨材料的磨料的磨料。
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公开(公告)号：US20090084880A1
公开(公告)日：2009-04-02
申请号：US12240033
申请日：2008-09-29
申请人： Ren ISHIKAWA , Katsuhiko Meguro
发明人： Ren ISHIKAWA , Katsuhiko Meguro
IPC分类号： G11B23/07 , G11B23/037 , G11B23/027 , B65H75/14 , B65H75/18
CPC分类号： G11B15/32 , B65H75/14 , B65H2401/13 , B65H2701/378 , G11B23/037
摘要： An aspect of the present invention relates to a magnetic tape reel. The magnetic tape reel comprises a hub on which a magnetic tape is wound, and a flange provided on at least one of upper and lower ends of the hub. The flange comprises a surface coating on at least a portion of a surface thereof on the hub side, the surface coating having a hardness equal to or greater than a hardness of an edge surface of the magnetic tape. A further aspect of the present invention relates to a magnetic tape cartridge comprising a magnetic tape and the magnetic tape reel.
摘要翻译： 本发明的一个方面涉及一种磁带卷盘。 磁带卷盘包括一个其上缠绕有磁带的轮毂，以及设置在轮毂的上端和下端中的至少一个上的凸缘。 所述凸缘包括在所述轮毂侧的表面的至少一部分上的表面涂层，所述表面涂层的硬度等于或大于所述磁带的边缘表面的硬度。 本发明的另一方面涉及一种包括磁带和磁带卷盘的磁带盒。
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公开(公告)号：US07485379B2
公开(公告)日：2009-02-03
申请号：US11185676
申请日：2005-07-21
申请人： Satoru Hayakawa , Katsuhiko Meguro
发明人： Satoru Hayakawa , Katsuhiko Meguro
IPC分类号： G11B5/64
CPC分类号： G11B5/735 , G11B5/7026 , G11B5/70678 , G11B5/7305 , G11B5/733 , G11B5/738 , Y10T428/31565
摘要： A magnetic recording medium comprising: a magnetic layer; a first radiation curable resin layer; a non-magnetic support having an intrinsic viscosity of from 0.47 to 0.51 dL/g; and a second radiation curable resin layer, in this order, wherein the first radiation curable resin layer contains a filler, and the second radiation curable resin layer contains a filler.
摘要翻译： 一种磁记录介质，包括：磁性层; 第一辐射固化树脂层; 特性粘度为0.47〜0.51dL / g的非磁性载体; 和第二可辐射固化树脂层，其中第一可辐射固化树脂层含有填料，第二可辐射固化树脂层含有填料。
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