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：US06686024B2

公开(公告)日：2004-02-03

申请号：US10131179

申请日：2002-04-25

申请人： Mikio Ohno ,  Naoto Murao ,  Toshichika Aoki ,  Hiroaki Araki

发明人： Mikio Ohno ,  Naoto Murao ,  Toshichika Aoki ,  Hiroaki Araki

IPC分类号： G11B5708

CPC分类号： G11B5/70615 ,  G11B5/7085 ,  G11B5/71 ,  G11B5/84 ,  Y10T428/25

摘要： A magnetic recording medium is formed from a non-magnetic support, and a magnetic layer formed on the support and including mainly a binder resin and a ferromagnetic metal powder including mainly Fe. The magnetic layer includes an abrasive and a lubricant. The abrasive present on the surface of the magnetic layer satisfies the relationship 0.01≦H15/H10≦0.3 where H10 denotes the number of particles per unit area having a height less than 10 nm (particles/&mgr;m2) and H5 denotes the number of particles per unit area having a height equal to or greater than 15 nm (particles/&mgr;m2). The magnetic recording medium has a surface lubricant index of 3 to 11. The height of the abrasive particles can be controlled by, for example, a blade treatment using an abrasive tape (LTBL system) or a diamond powder-studded rotating roll (DWBL system).

摘要翻译： 磁记录介质由非磁性载体和形成在载体上的磁性层形成，主要包括粘合剂树脂和主要包含Fe的强磁性金属粉末。 磁性层包括研磨剂和润滑剂。 存在于磁性层表面上的研磨剂满足0.01 <= H15 / H10 <= 0.3的关系，其中H10表示高度小于10nm的单位面积的颗粒数（颗粒/母体2），H5表示 高度等于或大于15nm的单位面积的颗粒数（颗粒/母体2）。 磁记录介质具有3至11的表面润滑指数。可以通过例如使用研磨带（LTBL系统）或金刚石粉末旋转辊（DWBL系统）的刀片处理来控制磨料颗粒的高度 ）。

公开(公告)号：US06692849B2

公开(公告)日：2004-02-17

申请号：US09956036

申请日：2001-09-20

申请人： Hiroaki Araki ,  Mikio Ohno ,  Toshichika Aoki

发明人： Hiroaki Araki ,  Mikio Ohno ,  Toshichika Aoki

IPC分类号： B32B516

CPC分类号： G11B5/70 ,  G11B5/7085 ,  G11B5/714 ,  Y10T428/24355 ,  Y10T428/24372

摘要： A magnetic recording medium is provided comprising a non-magnetic support and at least one magnetic layer comprising ferromagnetic metal particles principally containing iron, having a spindle shape and having an average major axis length of 0.15 &mgr;m or less, and a binder resin, and optionally further comprising, between the support and the magnetic layer, at least one adhesive layer or at least one non-magnetic layer principally containing a non-magnetic inorganic powder and a binder, and wherein center line average surface roughness Ra of the magnetic layer surface being 2 to 6 nm, said recording medium having the following properties; steel ball wear at 23° C. and 70% RH being 2×10−5 to 4×10−5 mm3, surface C/Fe ratio measured by Auger electron spectroscopy being 50 to 100, and coefficient of friction between the magnetic layer surface and an SUS rod having a roughness of 8 to 10 nm being 0.2 to 0.3.

摘要翻译： 提供了一种磁记录介质，其包括非磁性载体和至少一个磁性层，所述至少一个磁性层包含主要包含铁的铁磁性金属颗粒，其主轴形状和平均长轴长度为0.15μm或更小，以及粘合剂树脂， 还包括在所述支撑体和所述磁性层之间的至少一个粘合剂层或主要包含非磁性无机粉末和粘合剂的至少一个非磁性层，并且其中所述磁性层表面的中心线平均表面粗糙度Ra为 2〜6nm，所述记录介质具有以下特性; 在23℃和70％RH下的钢球磨损为2×10 -5至4×10 -5 mm 3，通过俄歇电子能谱法测得的表面C / ​​Fe比为50至100，摩擦系数 磁性层表面和粗糙度为8〜10nm的SUS棒为0.2〜0.3。

公开(公告)号：US6149989A

公开(公告)日：2000-11-21

申请号：US84866

申请日：1998-05-28

申请人： Hiroaki Araki ,  Tsuneo Yoshida ,  Toshichika Aoki ,  Masashi Aonuma ,  Kazuo Kato ,  Kazutoshi Katayama ,  Hiroshi Hashimoto

发明人： Hiroaki Araki ,  Tsuneo Yoshida ,  Toshichika Aoki ,  Masashi Aonuma ,  Kazuo Kato ,  Kazutoshi Katayama ,  Hiroshi Hashimoto

IPC分类号： G11B5/706 ,  G11B5/66

CPC分类号： G11B5/7085 ,  G11B5/70621 ,  Y10S428/90

摘要： The present invention discloses a magnetic recording particulate mediumhaving amagnetic layer on anonmagnetic support, the magnetic layer containing a ferromagnetic metal powder and a binder and having a coercive force of 1,400 to 1,700 Oe, wherein the ferromagnetic metal powder is spindle-shaped particles consisting essentially of Fe and having a Co/Fe ratio of from 1 to 5 atomic %, an Al/Fe ratio of from 5 to 15 atomic %, an average major axis length of 0.1 to 0.2 .mu.m and a specific surface area of 40 to 50 m.sup.2 /g, and the binder contains a polyurethane consisting essentially of a diol component comprising a polyether polyol and a polyester polyol and a polyisocyanate component. This magnetic recording particulate medium is characterized by minimal head wear, freedom from head clogging, and satisfactory electromagnetic characteristics.

摘要翻译： 本发明公开了一种磁性载体上的磁记录微粒介质，其磁性层含有强磁性金属粉末和粘合剂，矫顽力为1,400至1700He，其中铁磁性金属粉末为纺锤形颗粒，主要由 Fe，Co / Fe比为1〜5原子％，Al / Fe比为5〜15原子％，平均长轴长度为0.1〜0.2μm，比表面积为40〜50μm / g，并且粘合剂含有主要由包含聚醚多元醇和聚酯多元醇和多异氰酸酯组分的二醇组分组成的聚氨酯。 这种磁记录颗粒介质的特征在于最小的头部磨损，不受头部堵塞和令人满意的电磁特性。