发明授权
- 专利标题: Magnetic recording medium
- 专利标题(中): 磁记录介质
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申请号: US726571申请日: 1991-07-08
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公开(公告)号: US5149585A公开(公告)日: 1992-09-22
- 发明人: Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
- 申请人: Narito Goto , Katsuyuki Takeda , Kunitsuna Sasaki , Nobuyuki Sekiguchi
- 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: JPX2-186461 19900713
- 主分类号: C09D5/23
- IPC分类号: C09D5/23 ; C09D127/04 ; C09D127/06 ; C09D175/00 ; C09D175/04 ; G11B5/702 ; G11B5/706 ; G11B5/716 ; G11B5/842
摘要:
A magnetic recording medium is disclosed, which is improved in electromagnetic conversion properties. The recording medium comprises a support, an uppermost magnetic mayer being provided on the support and one or more lower magnetic layers being provided between the support and the uppermost magnetic layer, in which the uppermost magnetic layer comprises a binder and a hexagonal magnetic powder and has a layer thickness of from 0.1 .mu.m to 1.0 .mu.m, and at least one of the lower magnetic layer comprises a binder having a anionic functional group and a magnetic powder, and has a coercive force of from 500 Oe to 1200 Oe, and the uppermost magnetic layer and the lower layer were formed on the support by wet-on-wet simultaneous multi-layer coating.
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