发明名称 |
Hematite particles aggregates, non-magnetic undercoatt layer for magnetic recording medium using the same, and magnetic recording medium having the non-magnetic undercoat layer |
摘要 |
Hematite particles aggregates as non-magnetic particles of the present invention are capable of forming a non-magnetic undercoat layer of a magnetic recording medium having a more excellent surface smoothness, which can exhibit not only an excellent dispersibility but also have an improving ability of a surface smoothness of a coating film produced therefrom by calendering treatment, a non-magnetic undercoat layer for magnetic recording medium which contains the hematite particles aggregates is exhibits a more excellent surface smoothness, and a magnetic recording medium having the non-magnetic undercoat layer, is exhibits a more excellent surface smoothness.
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申请公布号 |
US6723456(B2) |
申请公布日期 |
2004.04.20 |
申请号 |
US20010022818 |
申请日期 |
2001.12.20 |
申请人 |
TODA KOGYO CORPORATION |
发明人 |
HAYASHI KAZUYUKI;IWASAKI KEISUKE;ISHITANI SEIJI;MORII HIROKO |
分类号 |
G11B5/733;G11B5/738;(IPC1-7):B32B5/16 |
主分类号 |
G11B5/733 |
代理机构 |
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主权项 |
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地址 |
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