发明名称 |
Magnetic recording medium |
摘要 |
A magnetic recording medium which comprises a plastic base film and a magnetic layer formed on one side of the base film and composed of ferromagnetic alloy powder dispersed in a resin binder, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m2/g as measured by BDT method, said magnetic layer has a coercive force of at least 1,000 Oe and a surface roughness of at most 0.08 mu m, and a thermoset backing layer having a surface roughness of from 0.05 to 0.6 mu m is formed on the other side of the base film, the backing layer being made of a thermosetting resin composition comprising a vinyl chloride-vinyl acetate-vinyl alcohol copolymer, a polyurethane resin and a polyisocyanate.
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申请公布号 |
US4614687(A) |
申请公布日期 |
1986.09.30 |
申请号 |
US19840627546 |
申请日期 |
1984.07.03 |
申请人 |
TDK CORPORATION |
发明人 |
NISHIMATSU, MASAHARU;IDE, TOSHIAKI;SAITO, YOSHIAKI;KUBOTA, YUICHI |
分类号 |
C09D5/23;C09D7/12;G11B5/714;G11B5/73;G11B5/735;(IPC1-7):G11B5/70 |
主分类号 |
C09D5/23 |
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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