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公开(公告)号:US4693930A
公开(公告)日:1987-09-15
申请号:US730272
申请日:1985-05-03
IPC分类号: G11B5/702 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/708 , G11B5/71 , G11B5/68 , G11B5/706
CPC分类号: G11B5/71 , Y10S428/90 , Y10T428/25
摘要: Flexible magnetic recording media such as videotapes based on ferromagnetic oxide particles can provide high carrier-to-noise ratios previously available only with metal powder tapes when the recording layer has a high loading (at least 74% by weight) of oxide particles which have a high surface area (at least 40 m.sup.2 /g) and includes free monobasic fatty acid comprising more than 1.5% by weight of the ferromagnetic oxide particles. The free fatty acid provides a coefficient of friction not exceeding 0.3. A preferred monobasic fatty acid is myristic acid. By incorporating into the binder a lubricant-adsorption inhibitor such as citric acid, a greater proportion of the fatty acid remains free.
摘要翻译: 基于铁磁氧化物颗粒的诸如录像带的柔性磁记录介质可以提供仅当金属粉末带才具有高的载波 - 噪声比,当记录层具有高负载(至少74重量%)的氧化物颗粒时,其具有 高表面积(至少40m 2 / g),并且包括大于1.5重量%的铁磁性氧化物颗粒的游离一元脂肪酸。 游离脂肪酸提供的摩擦系数不超过0.3。 优选的一元脂肪酸是肉豆蔻酸。 通过在粘合剂中加入润滑剂吸附抑制剂如柠檬酸,较大比例的脂肪酸保持游离。