公开(公告)号：US20060166041A1

公开(公告)日：2006-07-27

申请号：US11340513

申请日：2006-01-27

申请人： Toshiharu Takeda ,  Toshichika Aoki ,  Tomoko Yamamuro

发明人： Toshiharu Takeda ,  Toshichika Aoki ,  Tomoko Yamamuro

IPC分类号： G11B5/708

CPC分类号： G11B5/70 ,  G11B5/714

摘要： A magnetic recording medium comprising: a nonmagnetic support; and a magnetic layer comprising a binder and ferromagnetic powder dispersed in the binder, wherein the magnetic layer has a surface waviness of from 3 to 15%, the surface waviness being calculated by {[(a total of cross-sectional areas of the magnetic layer at a position 5 nm in an above direction from an average plane of surface waviness of the magnetic layer)+(a total of cross-sectional areas of the magnetic layer at a position 5 nm in a below direction from the average plane of surface waviness of the magnetic layer)] (μm2)/a area of a surface of the magnetic layer to be measured (μm2)}×100(%).

摘要翻译： 一种磁记录介质，包括：非磁性载体; 以及包含分散在粘合剂中的粘合剂和铁磁性粉末的磁性层，其中磁性层的表面波纹度为3〜15％，表面波纹度由{[（磁性层的横截面积的总和 在距离磁性层的表面波纹的平均平面的上述方向5nm的位置处）+（在距离表面波纹的平均面的下方的5nm的位置的磁性层的总截面积 的磁性层）]（mum ^{2）/要测量的磁性层的表面的面积（mum <2）}×100（％）。}

公开(公告)号：US20060078711A1

公开(公告)日：2006-04-13

申请号：US11237747

申请日：2005-09-29

申请人： Toshiharu Takeda ,  Youhei Aritoshi

发明人： Toshiharu Takeda ,  Youhei Aritoshi

IPC分类号： G11B5/64

CPC分类号： G11B5/82 ,  G11B5/70 ,  G11B5/7026 ,  G11B5/73 ,  G11B5/7305 ,  G11B5/735 ,  Y10T428/24355

摘要： A magnetic recording medium comprising: a nonmagnetic support; and a magnetic layer containing ferromagnetic powder and a binder, wherein the magnetic layer has on a surface thereof 80 or less depressions having a depth of 10 nm or more per 260×350 μm2.

摘要翻译： 一种磁记录介质，包括：非磁性载体; 以及含有铁磁粉末和粘合剂的磁性层，其中磁性层在其表面上具有80个或更少的凹陷，每260x350μm2的深度为10nm以上。

公开(公告)号：US20070230054A1

公开(公告)日：2007-10-04

申请号：US11727942

申请日：2007-03-29

申请人： Toshiharu Takeda ,  Katsuhiko Meguro ,  Takeshi Nagata

发明人： Toshiharu Takeda ,  Katsuhiko Meguro ,  Takeshi Nagata

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。

公开(公告)号：US5728454A

公开(公告)日：1998-03-17

申请号：US421214

申请日：1995-04-07

申请人： Hiroo Inaba ,  Toshiharu Takeda ,  Noburo Hibino

发明人： Hiroo Inaba ,  Toshiharu Takeda ,  Noburo Hibino

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/70 ,  G11B5/716 ,  G11B5/73 ,  G11B5/738 ,  G11B5/66

CPC分类号： G11B5/738 ,  G11B5/70 ,  G11B5/716 ,  G11B5/7305 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/24959 ,  Y10T428/24975 ,  Y10T428/24983 ,  Y10T428/265

摘要： A magnetic recording medium comprising on a non-magnetic support having thereon, in this order, an adhesive layer comprising a polymer, an undercoating layer comprising an inorganic powder and a binder, and one or more upper magnetic layers each comprising at least a ferromagnetic powder and a binder, the thickness of the upper magnetic layer being in the range of 0.05 to 1.0 .mu.m, the thickness of the undercoating layer being in the range of 0.5 to 5.0 .mu.m, the total thickness of the magnetic recording medium is in the range of 4 to 10 .mu.m, the micro vickers hardness of the non-magnetic support being in the range of 75 to 100 kg/mm.sup.2, and the micro vickers hardness of the undercoating layer being in the range of 25 to 50 kg/mm.sup.2.

摘要翻译： 一种磁性记录介质，其特征在于，具有非磁性载体，其上依次包括由聚合物构成的粘合剂层，包含无机粉末和粘合剂的底涂层，以及一个或多个上部磁性层，每个上部磁性层至少包含铁磁性粉末 和粘合剂，上磁性层的厚度在0.05〜1.0μm的范围内，底涂层的厚度在0.5〜5.0μm的范围内，磁记录介质的总厚度为 范围为4〜10μm，非磁性载体的显微维氏硬度为75〜100kg / mm 2，底涂层的显微维氏硬度为25〜50kg / mm2 。

公开(公告)号：US20070231616A1

公开(公告)日：2007-10-04

申请号：US11727941

申请日：2007-03-29

申请人： Toshiharu Takeda ,  Katsuhiko Meguro

发明人： Toshiharu Takeda ,  Katsuhiko Meguro

IPC分类号： G11B5/706

CPC分类号： G11B5/7305

摘要： A magnetic recording medium including a nonmagnetic substrate and a magnetic layer, wherein the nonmagnetic substrate is made from a polyethylene naphthalate and has a thickness of 6.5 μm or smaller, and the magnetic recording medium has a creep deformation of 0.30% or less in a longitudinal direction of the magnetic recording medium under a tensile stress of 15.7 MPa applied in the longitudinal direction at 60° C. for 50 hours.

摘要翻译： 一种包括非磁性基底和磁性层的磁记录介质，其中非磁性基底由聚萘二甲酸乙二醇酯制成，厚度为6.5μm或更小，并且磁记录介质在纵向上具有0.30％或更小的蠕变变形 方向的拉伸应力为15.7MPa的磁记录介质在60℃下沿长度方向施加50小时。

公开(公告)号：US20070009768A1

公开(公告)日：2007-01-11

申请号：US11475068

申请日：2006-06-27

申请人： Toshiharu Takeda ,  Katsuhiko Meguro

发明人： Toshiharu Takeda ,  Katsuhiko Meguro

IPC分类号： G11B5/706 ,  G11B5/708 ,  B05D5/12

CPC分类号： G11B5/7305 ,  G11B5/70 ,  G11B5/8404

摘要： The present invention provides a magnetic recording medium comprising: a non-magnetic substrate; and one or more magnetic layers formed on the non-magnetic substrate, wherein the magnetic recording medium has a loss modulus at 0.5 Hz at a temperature of 130° C. of 0.18 to 0.39 GPa, in order to improve dimensional stability and running stability of a tape, particularly in a high-temperature environment, and thereby improve reliability in recording and reproduction of data, and to provide a method for manufacturing the same. Also, the magnetic recording medium of the present invention attains the object to solve the problem that tension for driving generates nonuniform elongation in the medium, resulting in reduction of running stability because of a thin magnetic recording medium which is reduced the total thickness to increase the capacity of the backup tape per reel by increasing a tape length and increase.

摘要翻译： 本发明提供一种磁记录介质，包括：非磁性基板; 以及形成在非磁性基板上的一个或多个磁性层，其中磁记录介质在130℃的温度为0.5Hz的损耗模量为0.18至0.39GPa，以提高尺寸稳定性和运行稳定性 一种胶带，特别是在高温环境下，从而提高数据的记录和再现的可靠性，并提供一种其制造方法。 此外，本发明的磁记录介质的目的是为了解决用于驱动的​​张力在介质中产生不均匀的伸长的问题，导致由于薄的磁记录介质而导致的运行稳定性的降低，从而减小总厚度以增加 通过增加磁带长度和增加，每个磁带备份磁带的容量。

公开(公告)号：US20050259342A1

公开(公告)日：2005-11-24

申请号：US11135279

申请日：2005-05-24

申请人： Toshiharu Takeda

发明人： Toshiharu Takeda

IPC分类号： G11B5/70 ,  G11B5/735 ,  G11B11/00

CPC分类号： G11B5/70 ,  G11B5/735

摘要： A magnetic recording and reproducing method of recording or reproducing information using a magnetic recording medium comprising a non-magnetic support having provided thereon at least a magnetic layer containing a ferromagnetic powder dispersed in a binder, which comprises using a magnetic recording medium satisfying the following requirements; having on the surface of the magnetic layer 20/(260×350 μm2) or less depressions with a depth of 1/3 or more of the recording bit length and a cross-sectional area of 1/2 or more of the reproducing bit area.

摘要翻译： 一种使用包括非磁性载体的磁记录介质的磁记录和再现方法，所述磁记录介质至少设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其包括使用满足以下要求的磁记录介质 ; 在磁性层20 /（260×350μm）的表面上具有1/3或更大的记录位长度的深度或更小的凹陷，横截面积为1/2或 更多的是重放位区域。