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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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12.发明授权Magnetic recording medium and method for manufacturing binder for magnetic recording medium 失效磁记录介质及其制造用于磁记录介质的粘合剂的方法
公开(公告)号：US06037070A
公开(公告)日：2000-03-14
申请号：US883903
申请日：1997-06-27
IPC分类号： G11B5/702
CPC分类号： G11B5/7023 , G11B5/7021 , G11B5/7022 , Y10S428/90
摘要： A poor solvent is used for removing low molecular weight components from a binder, which has weight average molecular weight within the range of 10,000 to 60,000, said poor solvent has a solubility parameter being different from solubility parameter of the binder by more than 1.3 and less than 2.3 and is a solvent such as acetonitrile having no active hydrogen, and a difference between solubility parameter of the solvent in the solution after mixing and solubility parameter of the binder is more than 1.0 and less than 2.0, said poor solvent is used for fractional precipitation, and the poor solvent being by 0.5 to 3 times as much as the quantity of the binder solution is added to separate the solution to a liquid phase where low molecular weight components are dissolved more and a liquid layer where high molecular weight components are dissolved more and the latter is taken up, or an ultrafiltration membrane is used to remove low molecular weight components, content of the low molecular weight components having molecular weight of not more than 5,000 are reduced to not more than 3 weight % of total weight of the binder, and said binder is used for formation of a magnetic layer and a lower coating layer of a magnetic recording medium.
摘要翻译： 使用不良溶剂从粘合剂中除去低分子量组分，其重均分子量在10,000至60,000范围内，所述不良溶剂的溶解度参数不同于粘合剂的溶解度参数大于1.3以下 不含活性氢的溶剂如乙腈，混合后的溶剂溶解度参数与粘合剂溶解度参数的差异大于1.0，小于2.0时，所用的不良溶剂用于分级 沉淀，不良溶剂为加入粘合剂溶液量的0.5-3倍，将溶液分离成液态较低分子量组分溶解的液相和溶解有高分子量组分的液体层 更多的是后者被吸收，或者使用超滤膜去除低分子量成分，低分子量的含量 分子量不大于5,000的重量组分减少到不超过粘合剂总重量的3重量％，并且所述粘合剂用于磁记录介质的磁性层和下涂层的形成。
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公开(公告)号：US20060289335A1
公开(公告)日：2006-12-28
申请号：US11453978
申请日：2006-06-16
申请人： Yutaka Kakuishi , Katsumi Ryoke , Katsuhiko Meguro
发明人： Yutaka Kakuishi , Katsumi Ryoke , Katsuhiko Meguro
IPC分类号： B65D79/00
CPC分类号： G11B5/84
摘要： A manufacturing method of a tape-form recoding medium in the present invention includes a raw web manufacturing process of forming a data recoding layer on one side of a substrate and a back coat layer having a minute convexity on the other side thereof, and thus manufacturing raw web of the tape-form recoding medium; a raw web winding process of winding the raw web with a predetermined tension; a raw web rewinding process of rewinding the raw web; and a raw web heating process of heating the rewound raw web.
摘要翻译： 本发明的带状记录介质的制造方法包括在基板的一面上形成数据记录层的原纸幅制造工序和在其另一面上具有微小凸起的背涂层，由此制造 带状记录介质的原始网页; 以预定张力卷绕原料纤维网的原料卷绕过程; 将卷筒纸重绕的原料卷筒纸卷绕过程; 以及加热回卷的原料网的原料网加热过程。
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公开(公告)号：US20060093869A1
公开(公告)日：2006-05-04
申请号：US11266186
申请日：2005-11-04
IPC分类号： G11B5/716
CPC分类号： G11B5/73 , G11B5/7026 , G11B5/70678 , G11B5/7305
摘要： A magnetic recording medium is provided that comprises a non-magnetic support and, in order above at least one surface thereof, a reinforcing layer comprising at least one material selected from the group consisting of metals, metalloids, and alloys, and oxides and composites thereof, a smoothing layer, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder.
摘要翻译： 提供一种磁记录介质，其包括非磁性载体，并且在其至少一个表面上依次包括选自金属，准金属和合金中的至少一种材料的增强层及其氧化物及其复合材料 平滑层，以及包含分散在粘合剂中的铁磁性粉末的磁性层。
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公开(公告)号：US20050202288A1
公开(公告)日：2005-09-15
申请号：US11037060
申请日：2005-01-19
IPC分类号： G11B5/68
CPC分类号： G11B5/714 , G11B5/7305 , G11B5/733 , Y10T428/31794
摘要： A magnetic recording medium including a polymer support having thereon at least one magnetic layer containing a ferromagnetic metal powder having an average major axis length of from 20 to 100 nm or a ferromagnetic hexagonal ferrite powder having an average tabular diameter of from 5 to 40 nm and a binder, the polymer support having an intrinsic viscosity of from 0.47 to 0.51 dL/g, a Young's modulus in the machine direction of from 7.0 to 8.6 GPa, a Young's modulus in the transverse direction of from 5.4 to 8.0 GPa, and a breaking strength in the transverse direction of from 370 to 450 MPa.
摘要翻译： 一种磁记录介质，包括其上具有至少一个磁性层的聚合物载体，所述磁性层含有平均长轴长度为20至100nm的铁磁性金属粉末或平均片状直径为5至40nm的铁磁性六方铁氧体粉末，以及 粘合剂，特性粘度为0.47〜0.51dL / g的聚合物载体，纵向的杨氏模量为7.0〜8.6GPa，横向的杨氏模量为5.4〜8.0GPa，断裂 横向强度为370〜450MPa。
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16.发明授权Magnetic recording medium having a magnetic layer with a Tg of 80.degree. C . .degree. C. 失效具有Tg为80℃至100℃的磁性层的磁记录介质
公开(公告)号：US5419943A
公开(公告)日：1995-05-30
申请号：US144317
申请日：1993-11-01
CPC分类号： G11B5/7305 , G11B5/70 , G11B5/7021 , G11B5/78 , Y10S428/90 , Y10T428/24355 , Y10T428/249986 , Y10T428/25 , Y10T428/256 , Y10T428/265
摘要： A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer, said magnetic layer comprising ferromagnetic particles and a binder, wherein nonmagnetic support has a transverse-direction Young's modulus of at least 1,000 Kg/mm.sup.2, said magnetic layer has a glass transition temperature of 80.degree. to 100.degree. C., and said magnetic recording medium has a total thickness of less than 12 .mu.m, and further a magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer, said magnetic layer comprising ferromagnetic particles and a binder, wherein said magnetic recording medium is adapted for use with a magnetic head having a core width of at least 100 .mu.m at a speed of at least 20 m/sec based upon relative speed of said recording medium and said head, said nonmagnetic support has a transverse-direction Young's modulus of at least 1,000 Kg/mm.sup.2, said magnetic layer has a glass transition temperature of from 80.degree. to 100.degree. C., and said magnetic recording medium has a total thickness of less than 12 .mu.m.
摘要翻译： 公开了一种磁记录介质，其包括其上具有磁性层的非磁性载体，所述磁性层包含铁磁颗粒和粘合剂，其中非磁性载体的横向杨氏模量为至少1,000Kg / mm 2，所述磁性层具有 玻璃化转变温度为80℃至100℃，所述磁记录介质的总厚度小于12μm，并且还公开了一种磁记录介质，其包括其上具有磁性层的非磁性载体，所述磁性层 包括铁磁颗粒和粘合剂，其中所述磁记录介质适用于基于所述记录介质的相对速度，以至少20m / sec的速度具有至少100μm的芯宽的磁头，并且所述磁性介质 头部，所述非磁性载体的横向杨氏模量为至少1,000Kg / mm 2，所述磁性层的玻璃化转变温度为80° DEG至100℃，所述磁记录介质的总厚度小于12μm。
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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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公开(公告)号：US20070166571A1
公开(公告)日：2007-07-19
申请号：US11649792
申请日：2007-01-05
CPC分类号： G11B5/714 , G11B5/70 , G11B5/7305
摘要： An aspect of the present invention provides a magnetic recording medium comprising following layers in this order on at least one surface of a nonmagnetic support: a nonmagnetic layer including a nonmagnetic powder and a binder; and a magnetic layer including a magnetic powder and a binder, wherein the nonmagnetic support has an enthalpy relaxation (ΔH) equal to or more than 0.5 J/g and equal to or less than 2.0 J/g. According to the aspect of the present invention, a magnetic recording medium is provided that is superior in electromagnetic conversion (e.g., with a high S/N ratio for surface recording density) and running durability (e.g., with a small number of dropouts and a low error rate).
摘要翻译： 本发明的一个方面提供一种在非磁性载体的至少一个表面上依次包含以下层的磁记录介质：包括非磁性粉末和粘合剂的非磁性层; 以及包含磁性粉末和粘合剂的磁性层，其中所述非磁性载体具有等于或大于0.5J / g且等于或小于2.0J / g的焓弛豫（DeltaH）。 根据本发明的一个方面，提供了一种电磁转换（例如，用于表面记录密度的高S / N比）和运行耐久性优异的磁记录介质（例如，具有少数辍学和 低错误率）。
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公开(公告)号：US20060257693A1
公开(公告)日：2006-11-16
申请号：US11431614
申请日：2006-05-11
IPC分类号： G11B5/64
CPC分类号： G11B5/7305 , G11B5/73
摘要： A magnetic recording medium is provided that comprises in order a non-magnetic support having a degree of crystallinity of from 40% to 60% and a rigid amorphous content of from 20% to 60%, at least a reinforcing layer comprising a material selected from a group consisting of metals, metalloids and alloys, and oxides and composites thereof, a non-magnetic layer comprising a non-magnetic powder and a binder, and a magnetic layer comprising a ferromagnetic powder and a binder.
摘要翻译： 提供一种磁记录介质，其顺序包括具有40％至60％的结晶度和20％至60％的刚性无定形含量的非磁性载体，至少包含选自以下的材料的增强层： 由金属，准金属和合金组成的组，及其氧化物和复合材料，包含非磁性粉末和粘合剂的非磁性层以及包含铁磁性粉末和粘合剂的磁性层。
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