发明名称 Magnetic recording medium
摘要 A magnetic recording medium comprising a support having thereon a plurality of magnetic layers comprising a first magnetic layer provided as an uppermost layer and a second magnetic layer provided adjacent to said first magnetic layer, wherein the first and second magnetic layers each comprises a magnetic powder and a binder containing a vinyl chloride resin and/or cellulose resin, the binder contents in the first magnetic layer and the second magnetic layer satisfy the relationship defined by the following formula (1), and the contents of the vinyl chloride resin and the cellulose resin in the first magnetic layer and the second magnetic layer satisfy the relationship defined by the following formula (2):0.6 </=(A-B)/B</=6(1)0.4 </=(C-D)/D</=11(2)wherein A represents the ratio of the binder content in the second magnetic layer to the magnetic powder content in the second magnetic layer; B represents the ratio of the binder content in the first magnetic layer to the magnetic powder content in the first magnetic layer; C represents the ratio of the total content of the vinyl chloride resin and the cellulose resin in the second magnetic layer to the magnetic powder content in the second magnetic layer; and D represents the ratio of the total content of the vinyl chloride resin and the cellulose resin in the first magnetic layer to the magnetic powder content in the first magnetic layer. The magnetic recording medium according to the present invention is excellent in surface smoothness, output characteristics, overwritability and running durability.
申请公布号 US5814394(A) 申请公布日期 1998.09.29
申请号 US19960597961 申请日期 1996.02.07
申请人 KAO CORPORATION 发明人 ISHIKAWA, AKIRA;NAKAYAMA, HIDEHIKO;YAMASHITA, KAZUTAKA
分类号 C09D5/23;B32B33/00;C09D101/08;C09D127/00;C09D127/06;G11B5/66;G11B5/702;G11B5/706;G11B5/716;(IPC1-7):G11B5/716 主分类号 C09D5/23
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