Magnetic recording medium having a backcoat layer containing carbon black and platelet inorganic powder
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United States of America Patent
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Jul 15, 1997
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N/A
app pub date -
Sep 5, 1995
filing date -
Sep 5, 1994
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Abstract
In the magnetic recording medium with a total thickness of 12.5 .mu.m, a magnetic layer is formed on one surface of a non-magnetic supporter, and a back coat layer with a thickness of 1.0 .mu.m and composed of solid powder and a binder is formed on the other surface of the same non-magnetic supporter. The solid powder contains platelet inorganic powder and carbon black powder mixed in such a mix rate that the carbon black powder is between 5 and 20 parks by weight, when the platelet inorganic powder is 100 parts by weight. In spite of the fact that the total thickness of the magnetic recording medium is as thin as 12.5 .mu.m, a sufficient mechanical strength and a sufficient travel stability can be both obtained, while preventing tape damage such as breakage, wrinkles, etc.
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