| 摘要 |
PROBLEM TO BE SOLVED: To effectively remove adhering matters from a magnetic head when a magnetic tape is allowed to run many times and to ensure stable running. SOLUTION: A polyurethane resin obtained by reacting a cyclic diamine with water or a glycol having a molecular weight of 62-250, one of a polyether polyol and a polycarbonate polyol and a diisocyanate is used as a binder for forming the magnetic layer of a magnetic recording medium 10.
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