发明名称 |
Biaxially oriented polyester film for a magnetic recording medium |
摘要 |
<p>A biaxially oriented polyester film for a magnetic recording medium, which is formed from a polyester composition comprising at least one member of fine particulate agglomerates selected from the group consisting of alumina fine particulate agglomerates and fine particulate agglomerates of a composite oxide comprising alumina and other metal oxide(s) in a proportion of 0.05 to 1 % by weight of the polyester, the fine particulate agglomerates having an average particle diameter of 0.005 to 0.5 mu m and having been surface-treated with an alkali metal salt of a polyvalent carboxylic acid; and other inert fine particles different from the above fine particulate agglomerates and having an average particle diameter of 0.2 to 2.0 mu m in a proportion of 0.05 to 5 % by weight of the polyester; and a biaxially oriented laminate polyester film for a magnetic recording medium comprising a polyester film layer of the above polyester composition as at least one surface layer.</p> |
申请公布号 |
EP0794527(A3) |
申请公布日期 |
1997.11.19 |
申请号 |
EP19970301348 |
申请日期 |
1997.02.28 |
申请人 |
TEIJIN LIMITED |
发明人 |
MIZUTANI, KEI;WATANABE, HIDEAKI |
分类号 |
C08J5/18;B32B27/36;C08K9/04;C08L67/00;G11B5/708;G11B5/73;G11B5/733;(IPC1-7):G11B5/704 |
主分类号 |
C08J5/18 |
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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