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公开(公告)号:US20090045544A1
公开(公告)日:2009-02-19
申请号:US11838557
申请日:2007-08-14
IPC分类号: B29C47/14
CPC分类号: B29C55/06 , B29C48/0018 , B29C48/0022 , B29C48/022 , B29C48/08 , B29C48/28 , B29C48/387 , B29C48/69 , B29C48/91 , B29C48/914 , B29C48/9165 , B29C55/00 , B29C2793/0063 , B29K2079/085 , B29K2105/162 , B29K2105/167 , B29K2995/0006 , B29L2007/00 , B29L2031/34 , B29L2031/3406 , B29L2031/3468 , B29L2031/3487
摘要: A method for manufacturing an ultra-thin polymeric film is disclosed. The method includes the steps of melt blending of a polymeric composition or a nanocomposite composition in an extruder. Next, the molten composition is conveyed through a flat die with a small die lip gap. A melt pump may also be used to provide a constant, non-pulsating flow of the melted composition through the die. The melted composition may be passed through a filtration device to remove contaminants that could adversely affect the dielectric performance of the film. Next, the film is stretched by passing the film through take-up rollers at relatively high take-up speeds. Then, the composition is cooled to form a film or sheet. The edges of the film may be trimmed, and the film wound up on a roll using a tension-controlled winding mechanism. A heated roll may be used to temper/anneal the film, thereby eliminating frozen-in internal stresses.
摘要翻译: 公开了一种用于制造超薄聚合物膜的方法。 该方法包括在挤出机中熔融共混聚合物组合物或纳米复合组合物的步骤。 接下来,熔融组合物通过具有小的模唇间隙的平坦模具输送。 还可以使用熔体泵来提供通过模具的熔融组合物的恒定的非脉动流。 熔融的组合物可以通过过滤装置以除去可能不利地影响膜的介电性能的污染物。 接下来,通过以相对高的卷绕速度使卷取辊通过卷取辊来拉伸胶片。 然后,将组合物冷却以形成膜或片。 可以修剪膜的边缘,并且使用张力控制的卷绕机构将膜卷绕在卷上。 可以使用加热辊来回火/退火膜,从而消除冷冻内应力。