Stretched polypropylene film
    3.
    发明授权
    Stretched polypropylene film 失效
    拉伸聚丙烯薄膜

    公开(公告)号:US5556920A

    公开(公告)日:1996-09-17

    申请号:US499195

    申请日:1995-07-07

    摘要: An at least monoaxially stretched polypropylene film made of a composition comprising a crystalline polypropylene and a monocyclic olefin polymer (e.g. a polycyclobutene or a polycyclopentene), wherein the content of the monocyclic olefin polymer is 0.1-1,000 ppm by weight.The polypropylene film is superior not only in transparency but also in image clarity by which an image is clearly seen through the film.The polypropylene film, when further comprising talc having an average particle diameter of 0.1-10 .mu.m in an amount of 50-4,000 ppm by weight, can prevent the surface roughening or edge roughening of sheet during the sheet formation conducted before stretched film production.The polypropylene film, when further comprising an anti-blocking agent and a polyethylene together, can prevent the generation of voids caused by the anti-blocking agent.

    摘要翻译: 由包含结晶聚丙烯和单环烯烃聚合物(例如多环烯或聚环戊烯)的组合物制成的至少单轴拉伸的聚丙烯膜,其中单环烯烃聚合物的含量为0.1-1,000ppm重量。 聚丙烯薄膜不仅在透明度上而且在图像清晰度方面都是优异的,通过该图像可以清晰地看到胶片的图像。 当进一步包含平均粒径为0.1-10μm的滑石,其量为50-4,000ppm重量时,聚丙烯薄膜可以防止在拉膜生产之前进行的片材形成期间的片材的表面粗糙化或边缘粗糙化。 当进一步包含防粘连剂和聚乙烯时,聚丙烯膜可以防止由防粘连剂引起的空隙的产生。