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    Polyethylene terephthalate film for magnetic recording medium containing three different kinds of particles
    4.
    发明授权
    Polyethylene terephthalate film for magnetic recording medium containing three different kinds of particles 失效
    聚对苯二甲酸乙二醇酯膜用于含三种不同种类的颗粒的磁记录介质

    公开(公告)号：US5314736A

    公开(公告)日：1994-05-24

    申请号：US838665

    申请日：1992-02-21

    申请人： Chikakazu Kawaguchi ,  Yoshio Meguro ,  Takashi Harada

    发明人： Chikakazu Kawaguchi ,  Yoshio Meguro ,  Takashi Harada

    IPC分类号： B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  C08K3/20 ,  C08K3/36 ,  C08L21/00 ,  C08L67/00 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733 ,  D07N7/04

    CPC分类号： G11B5/7315 ,  G11B5/733 ,  Y10S428/90 ,  Y10T428/24372 ,  Y10T428/254 ,  Y10T428/257 ,  Y10T428/259 ,  Y10T428/31794

    摘要： Disclosed herein is a polyethylene terephthalate film for magnetic recording medium, which contains 0.1 to 1.0% by weight based on the film of aggregated silicon oxide particles having an average particle size of 0.03 to 0.2 .mu.m, primary particle of which having an average particle size of 0.005 to 0.05 .mu.m, 0.1 to 1.0% by weight based on the film of aggregated aluminium oxide particles having an average particle size of 0.03 to 0.2 .mu.m, primary particle of which having an average particle size of 0.005 to 0.05 .mu.m and 0.005 to 0.3% by weight based on the film of a crosslinked polymer having an average particle size of 0.2 to 0.8 .mu.m, said film having a center line average surface roughness of 0.003 to 0.015 .mu.m and a sum of F-5 values in both the machine direction and the transverse direction of at least 25.0 kg/mm.sup.2. The film has a flat surface and is excellent in slipperiness, abrasion resistance, scratch resistance and protuberance resistance, which can be used as a base film for high-density magnetic recording medium.

    摘要翻译： 本文公开了一种用于磁记录介质的聚对苯二甲酸乙二醇酯膜，其基于平均粒度为0.03至0.2μm的聚集氧化硅颗粒的膜含有0.1至1.0重量％，其一次颗粒的平均粒径 相对于平均粒径为0.03〜0.2μm的平均粒径为0.005〜0.05μm的一次粒子的平均粒径为0.005〜0.05μm的聚酰胺氧化物粒子的膜，为0.005〜0.05μm，为0.1〜1.0重量％ 相对于平均粒径为0.2〜0.8μm的交联聚合物的膜为0.005〜0.3重量％，所述膜的中心线平均表面粗糙度为0.003〜0.015μm，F-5值之和为 机器方向和横向方向至少为25.0 kg / mm2。 该膜具有平坦的表面，并且具有优异的滑动性，耐磨性，耐擦伤性和抗突起性，可用作高密度磁记录介质的基膜。