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    • 9. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US4465737A
    • 1984-08-14
    • US462179
    • 1983-01-31
    • Hajime MiyatukaAkira KasugaAkihiro MatsufujiTsutomu Sugisaki
    • Hajime MiyatukaAkira KasugaAkihiro MatsufujiTsutomu Sugisaki
    • G11B5/708C09D5/23C09D7/12C10M105/08C10N40/18C10N50/08G11B5/70G11B5/71G11B5/714H01F10/02
    • G11B5/71G11B5/714Y10S428/90Y10T428/269Y10T428/2982Y10T428/31678
    • A magnetic recording medium is disclosed. The medium is comprised of a support having a magnetic layer coated thereon. The magnetic layer is comprised of a ferromagnetic metal powder and a binder. The ferromagnetic metal powder has a specific surface area of not less than 30 m.sup.2 /g. The magnetic layer is further comprised of a fatty acid and a fatty acid ester in a total amount of 2 to 10 wt % based on the weight of the ferromagnetic metal powder. The proportion of the fatty acid ester is 15 to 60 wt % based on the total weight of the fatty acid and the fatty acid ester. The surface roughness of the magnetic layer is not more than 0.03.mu.. The recording medium has excellent video characteristics obtained by the use of fine metal particles having the disclosed specific surface area and by increasing the surface properties of the magnetic layer so that spacing loss between the recording or reproducing head and the recording tape is decreased and output level is increased and modulation noise is decreased so that the video S/N is increased.
    • 公开了一种磁记录介质。 介质由其上涂覆有磁性层的载体组成。 磁性层由铁磁金属粉末和粘合剂组成。 铁磁性金属粉末的比表面积为30m 2 / g以上。 磁性层进一步由脂肪酸和脂肪酸酯组成,总量为2〜10重量%,以铁磁性金属粉末的重量计。 脂肪酸酯的比例相对于脂肪酸和脂肪酸酯的总重量为15〜60重量%。 磁性层的表面粗糙度不大于0.03μm。 记录介质具有通过使用具有公开的比表面积的细金属颗粒和通过增加磁性层的表面性质而获得的优异的视频特性,使得记录或再现头与记录带之间的间隔损耗减小并且输出水平 增加了调制噪声,从而增加了视频S / N。