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专利名称：Biaxially oriented, laminated polyester film发明人：Okazaki, Iwao, Lionsmansion Jyurakunijyo
504,Miyake, Tohru,Abe, Koichi,Ohshima,Keisuke
申请号：EP94306359.4申请日：19940830公开号：EP04045B1公开日：20011114
摘要：A biaxially oriented, laminated polyester film has a lamination structure with atleast two layers. At least one of the outermost layers of the film is a thin laminated layerA having a thickness of not more than 3 mu m. In the layer A, mono-dispersed particlesare present at a very small content of not less than 0.01% by weight and less than 0.3%by weight. The mono-dispersed particles have a mean degree of agglomeration of lessthan 5 and a mean primary particle diameter of not less than 0.05 mu m and not morethan 3 mu m. A relative standard deviation of height distribution of protrusions formedon the surface of layer A is not more than 1.2. When the polyester film is used as a basefilm for magnetic recording media, the abrasion resistance of the film surface at a highspeed can be greatly increased.
申请人：TORAY INDUSTRIES
地址：JP
国籍：JP
代理机构：Coleiro, Raymond
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