发明名称 |
Magnetic recording particulate medium |
摘要 |
The present invention discloses a magnetic recording particulate mediumhaving amagnetic layer on anonmagnetic support, the magnetic layer containing a ferromagnetic metal powder and a binder and having a coercive force of 1,400 to 1,700 Oe, wherein the ferromagnetic metal powder is spindle-shaped particles consisting essentially of Fe and having a Co/Fe ratio of from 1 to 5 atomic %, an Al/Fe ratio of from 5 to 15 atomic %, an average major axis length of 0.1 to 0.2 mu m and a specific surface area of 40 to 50 m2/g, and the binder contains a polyurethane consisting essentially of a diol component comprising a polyether polyol and a polyester polyol and a polyisocyanate component. This magnetic recording particulate medium is characterized by minimal head wear, freedom from head clogging, and satisfactory electromagnetic characteristics.
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申请公布号 |
US6149989(A) |
申请公布日期 |
2000.11.21 |
申请号 |
US19980084866 |
申请日期 |
1998.05.28 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
ARAKI, HIROAKI;YOSHIDA, TSUNEO;AOKI, TOSHICHIKA;AONUMA, MASASHI;KATO, KAZUO;KATAYAMA, KAZUTOSHI;HASHIMOTO, HIROSHI |
分类号 |
G11B5/706;(IPC1-7):G11B5/66 |
主分类号 |
G11B5/706 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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