- 专利标题: Magnetic recording medium
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申请号: US448664申请日: 1989-12-11
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公开(公告)号: US5026598A公开(公告)日: 1991-06-25
- 发明人: Noboru Koyama , Yasushi Nakano , Setsuko Kawahara , Noboru Nakajima
- 申请人: Noboru Koyama , Yasushi Nakano , Setsuko Kawahara , Noboru Nakajima
- 申请人地址: JPX Tokyo
- 专利权人: Konica Corporation
- 当前专利权人: Konica Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX63-314491 19881212
- 主分类号: G11B5/708
- IPC分类号: G11B5/708 ; G11B5/714 ; G11B5/716
摘要:
There is disclosed a magnetic recording medium comprising a support and provided thereon a plurality of layers. The layers comprise an outermost magnetic layer and a lower magnetic layer, wherein the outermost magnetic layer contains carbon black having an average primary particle size ranging from 40 m.mu. to 300 m.mu., and the lower magnetic layer contains carbon black having an average primary particle size ranging from 5 m.mu. to 30 m.mu..
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