发明名称 |
Magnetic recording medium |
摘要 |
A magnetic recording medium is disclosed, in which a magnetic layer is formed on one surface of the non-magnetizable substrate and a back coating layer consisting essentially of a binder and a non-magnetizable pigment is formed on the other surface of the substrate. In the back coating layer, more than 80 weight percent of the binder is a polyurethane resin or a polyester resin having hydrophilic polar groups. The back coating layer also contains carbon black for preventing electrostatic charging and pigments with Mohs hardness higher than 5 for improving durability. The carbon black to the pigments weight ratio is set to be in the range of 95:5 to 60:40.
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申请公布号 |
US4612244(A) |
申请公布日期 |
1986.09.16 |
申请号 |
US19840656227 |
申请日期 |
1984.10.01 |
申请人 |
SONY CORPORATION |
发明人 |
KANEDA, KOJI;SUGIYAMA, MASAYOSHI |
分类号 |
C10M107/40;C09D5/23;C09D127/04;C09D127/06;C09D175/00;C09D175/04;C10N40/18;G11B5/73;G11B5/735;(IPC1-7):G11B5/72 |
主分类号 |
C10M107/40 |
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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