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    • 9. 发明申请
    • Apparatus, Methods, and Compositions for Producing Oriented Stretch Film In-Process
    • 用于生产定向拉伸膜的装置,方法和组合物
    • US20140144589A1
    • 2014-05-29
    • US14167580
    • 2014-01-29
    • Paragon Films, Inc.
    • Shaun Eugene PirtleKhurrum Shamsi
    • B29C53/00
    • B29C53/005B31F1/0016B31F7/006B65H18/10B65H2301/414322B65H2301/4148B65H2701/11234B65H2701/1752Y10T156/1015
    • Apparatus and methods for producing folded edges in a film in-process, and compositions of such film are provided. A method of folding edges includes: separating a first idler roll and a second idler roll by a first distance; positioning a plurality of folding guides between the first idler roll and the second idler roll; separating adjacent sections of film having a majority layer comprising a Ziegler Natta catalyzed linear low density polyethylene copolymer resin having molecules that inherently lack long chain branching, wherein a majority of said molecules are oriented in a substantially longitudinal direction due to an induced strain, and inducing two folds with each folding guide, thereby causing an edge of each section of film to turn under 180° and cling to a bottom surface of the section of film; and moving the adjacent sections of film from the folding guides to the second idler roll.
    • 提供了在工艺中的膜中生产折叠边缘的装置和方法,以及这种膜的组合物。 折叠边缘的方法包括:将第一惰轮和第二惰轮分开第一距离; 将多个折叠导轨定位在第一惰轮和第二惰轮之间; 分离具有包含齐格勒 - 纳塔催化的线性低密度聚乙烯共聚物树脂的多数层的相邻部分,其具有固有地缺乏长链支化的分子,其中大部分所述分子由于诱导的应变而在基本纵向方向上取向,并诱导 每个折叠导轨两个折叠,从而导致每个薄膜部分的边缘在180°下转动并粘附到薄膜部分的底部表面; 并将膜的相邻部分从折叠导向件移动到第二惰轮。