发明授权
US5876833A Magnetic recording medium containing magnetic powder and a polyurethane
binder having a specified radius of gyration
失效
含有磁性粉末和具有规定的回转半径的聚氨酯粘结剂的磁记录介质
- 专利标题： Magnetic recording medium containing magnetic powder and a polyurethane binder having a specified radius of gyration
- 专利标题（中）： 含有磁性粉末和具有规定的回转半径的聚氨酯粘结剂的磁记录介质
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申请号： US956796申请日： 1997-10-23
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公开(公告)号： US5876833A公开(公告)日： 1999-03-02
- 发明人: Masaki Suzuki , Hiroshi Hashimoto , Satoshi Matsubaguchi , Hiroaki Takano
- 申请人： Masaki Suzuki , Hiroshi Hashimoto , Satoshi Matsubaguchi , Hiroaki Takano
- 申请人地址： JPX
- 专利权人： Fuji Photo Film Co., Ltd.
- 当前专利权人： Fuji Photo Film Co., Ltd.
- 当前专利权人地址： JPX
- 优先权： JPX7-135769 19950510
- 主分类号： G11B5/70
- IPC分类号： G11B5/70 ; G11B5/702
摘要：
A magnetic recording medium is disclosed, comprising a magnetic layer mainly comprising a ferromagnetic powder and a binder resin formed on at least one side of a non-magnetic support, wherein said magnetic layer has a thickness of from 0.05 .mu.m to 0.8 .mu.m, said ferromagnetic powder has an average long axis length of from 0.05 .mu.m to 0.20 .mu.m, and said binder resin comprises a polyurethane having a radius of gyration from 5 to 25 nm in cyclohexanone.
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