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    Method and apparatus for manufacturing stretched sheets from a tubular film
    2.
    发明公开
    Method and apparatus for manufacturing stretched sheets from a tubular film 失效
    Verfahren und Apparat zur Herstellung gestreckter Folien aus einer Schlauchfolie。

    公开(公告)号：EP0027735A1

    公开(公告)日：1981-04-29

    申请号：EP80303688.8

    申请日：1980-10-17

    申请人： NIPPON PETROCHEMICALS COMPANY LIMITED ,  POLYMER PROCESSING RESEARCH INSTITUTE LIMITED

    发明人： Yazawa, Masahide ,  Yazawa, Hiroshi ,  Tani, Haruhisa ,  Kurihara, Kazuhiko

    IPC分类号： B29D7/24

    CPC分类号： B29C55/165 ,  B29C35/04 ,  B29C55/285 ,  B29C2793/009

    摘要： A method of manufacturing a pair of longitudinally and transversely stretched sheets from a flattened tubular thermoplastic polymer film comprises feeding the film (32) in a longitudinal direction (E) at a first speed, progressively gripping the film (32) along opposite selvages (33,34) thereof stretching the film (32) longitudinally and transversely while heating it and releasing the stretched film (32) to allow it to cool and set
    In order to stretch the film (32) and to separate it into two sheets (37,38) the gripped selvages (33,34) are moved along a pair of arcuate divergent paths lying in substantially the same plane at a second speed greater than the first speed and the stretched film (32) is cut at the selvages (33,34) into a pair of sheets (37,38) at the end of the arcuate divergent paths.
    The invention also includes apparatus for carrying out the method.

    摘要翻译： 从扁平管状热塑性聚合物膜制造一对纵向和横向拉伸的片材的方法包括以第一速度沿长度方向（E）进给薄膜（32），沿着相对的边缘（33）逐渐地夹持薄膜（32） ，34）在加热所述膜（32）的同时纵向和横向地拉伸并释放拉伸膜（32）以使其冷却和固化。 为了拉伸薄膜（32）并将其分离成两片（37,38），夹持的边缘（33,34）沿着位于基本相同的平面中的一对弧形发散路径移动 大于第一速度的第二速度和拉伸膜（32）在叶片（33,34）处被切割成在弓形发散路径的端部处的一对片（37,38）。 本发明还包括用于执行该方法的装置。