公开(公告)号：US20060210839A1

公开(公告)日：2006-09-21

申请号：US11374061

申请日：2006-03-14

申请人： Tsutomu Ide ,  Katsuhiko Yamazaki ,  Tomoyuki Kotaki ,  Sadafumi Iijima

发明人： Tsutomu Ide ,  Katsuhiko Yamazaki ,  Tomoyuki Kotaki ,  Sadafumi Iijima

IPC分类号： G11B5/716

CPC分类号： G11B5/7013 ,  G11B5/73

摘要： A magnetic recording medium which makes it possible to further increase the recording capacity while maintaining a required flexibility thereof. A magnetic tape has a lower non-magnetic layer and a magnetic layer formed on one surface of a base film in the mentioned order. The lower non-magnetic layer is formed of a non-magnetic coating material containing a non-magnetic powder, an electron beam curing binder, a dispersant having an amine group, and a thermosetting agent.

摘要翻译： 一种磁记录介质，其可以进一步提高记录容量，同时保持其所需的柔性。 磁带具有较低的非磁性层和以所述顺序形成在基膜的一个表面上的磁性层。 下部非磁性层由含有非磁性粉末，电子束固化粘合剂，具有胺基的分散剂和热固化剂的非磁性涂料形成。

公开(公告)号：US20060019128A1

公开(公告)日：2006-01-26

申请号：US10895846

申请日：2004-07-22

申请人： Hiroyuki Tanaka ,  Takashi Handa ,  Tomoyuki Kotaki

发明人： Hiroyuki Tanaka ,  Takashi Handa ,  Tomoyuki Kotaki

IPC分类号： G11B5/716 ,  G01R33/00

CPC分类号： G11B5/70 ,  G11B5/714

摘要： A magnetic recording medium which has a thin film magnetic layer considerably excellent in surface smoothness and is excellent in electromagnetic conversion property is provided. A method for evaluating the surface smoothness of a magnetic recording medium is also provided. A magnetic recording medium comprising: a non-magnetic support; a non-magnetic layer which is on one surface of the non-magnetic support and comprises at least carbon black, a non-magnetic-powder other than the carbon black and a binder resin; and a magnetic layer which is on the non-magnetic layer and comprises at least a ferromagnetic powder and a binder resin, wherein when the shape of irregularities of the surface of the magnetic layer is subjected to Fourier transformation to obtain the power spectrum density (PSD) in the longitudinal direction of the magnetic recording medium, the power spectrum density L2 at a wavelength 2λ in the longitudinal direction, wherein λ (μm) represents the shortest recording wavelength of a recording and reproducing device for the magnetic recording medium, is 6.0×10−6 nm2mm or less. A magnetic recording medium, wherein when the power spectrum density (PSD) in the width direction of the magnetic recording medium is obtained, the power spectrum density W2 at a wavelength 2λ in the width direction, wherein λ (μm) represents the shortest recording wavelength of a recording and reproducing device for the magnetic recording medium, is 3.5×10−6 nm2mm or less.

摘要翻译： 提供了具有表面平滑性优异且电磁转换特性优异的薄膜磁性层的磁记录介质。 还提供了用于评估磁记录介质的表面平滑度的方法。 一种磁记录介质，包括：非磁性载体; 非磁性层，其在所述非磁性载体的一个表面上并且至少包含炭黑，除了所述炭黑以外的非磁性粉末和粘合剂树脂; 以及磁性层，其位于非磁性层上并且至少包含铁磁性粉末和粘合剂树脂，其中当磁性层的表面的不规则形状进行傅里叶变换以获得功率谱密度（PSD ）在纵向方向上的波长为2λ的功率谱密度L 2 2，其中λ（mum）表示记录和再现装置的最短记录波长，用于 磁记录介质为6.0×10 -6〜2×2mm以下。 一种磁记录介质，其中当获得在磁记录介质的宽度方向上的功率谱密度（PSD）时，在宽度方向的波长为2λ的功率谱密度W 2 2，其中λ （mum）表示用于磁记录介质的记录和再现装置的最短记录波长，是3.5×10 -6 nm 2或以下。