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11. 发明授权

US5712028A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5712028A
公开(公告)日：1998-01-27
申请号：US618260
申请日：1996-03-18
申请人： Akihiko Seki , Akira Saitoh , Satoru Tsuchida
发明人： Akihiko Seki , Akira Saitoh , Satoru Tsuchida
IPC分类号： C09D5/23 , G11B5/708 , G11B5/73 , G11B5/738 , G11B5/70
CPC分类号： G11B5/738 , G11B5/7085 , Y10S428/90 , Y10T428/24975 , Y10T428/25 , Y10T428/265
摘要： A magnetic recording medium includes a flexible substrate, an undercoating layer formed on the substrate, and a magnetic layer formed on the undercoating layer. The undercoating layer contains a binder and nonmagnetic particles having an average particle size in the range of 0.01 to 0.20 .mu.m. The content of the nonmagnetic particles in the undercoating layer is in the range of 40 to 85% by weight. The magnetic layer contains ferromagnetic powder, a binder and an abrasive having an average particle size in the range of 0.10 to 0.40 .mu.m. The magnetic layer has a thickness in the range of 0.10 to 0.30 .mu.m and contains the abrasive in the range of 1 to 5 parts by weight relative to 100 parts by weight of the ferromagnetic powder. With this arrangement, the magnetic recording medium is capable of high density recording and excellent in electromagnetic transducer property and durability.
摘要翻译：磁记录介质包括柔性基板，形成在基板上的底涂层和形成在底涂层上的磁性层。底涂层含有平均粒度为0.01〜0.20μm的粘合剂和非磁性粒子。底涂层中的非磁性颗粒的含量在40至85重量％的范围内。磁性层包含铁磁粉末，粘合剂和平均粒度在0.10至0.40μm范围内的磨料。磁性层的厚度在0.10〜0.30μm的范围内，相对于100重量份的铁磁性粉末，磨料的含量为1〜5重量份。利用这种布置，磁记录介质能够进行高密度记录，并且具有优异的电磁换能器性能和耐久性。

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