发明授权
US4794040A Magnetic recording medium having a back coat layer containing carbon
black having defined ranges of pH and coloring power
失效
磁记录介质，其具有含有规定范围的pH和着色力的炭黑的背涂层
- 专利标题： Magnetic recording medium having a back coat layer containing carbon black having defined ranges of pH and coloring power
- 专利标题（中）： 磁记录介质，其具有含有规定范围的pH和着色力的炭黑的背涂层
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申请号： US867685申请日： 1986-05-28
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公开(公告)号： US4794040A公开(公告)日： 1988-12-27
- 发明人: Kumiko Ojima , Yukio Matsumoto , Hiroshi Togashi , Hiroshi Ogino
- 申请人： Kumiko Ojima , Yukio Matsumoto , Hiroshi Togashi , Hiroshi Ogino
- 申请人地址： JPX Yokohama
- 专利权人： Victor Company of Japan, Ltd.
- 当前专利权人： Victor Company of Japan, Ltd.
- 当前专利权人地址： JPX Yokohama
- 优先权： JPX60-114187 19850529; JPX60-114188 19850529
- 主分类号： G11B5/62
- IPC分类号： G11B5/62 ; G11B5/735 ; G11B5/72
摘要：
A magnetic recording medium comprising a non-magnetic support, a magnetic recording layer formed on one side of the support, and a back coat layer formed on the other side. The back coat layer is formed of a composition which comprises a dispersion, in a resin binder, of carbon black having a pH of 2.0 to 8.5 and a coloring power not less than 90 as determined by the ASTM method. The dispersion may further comprise a specific type of aliphatic acid-modified, fluorinated organosilicone in order to improve the travellability and durability of the medium.
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