发明名称 |
Method for manufacturing uktra-thin polymeric films |
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. |
申请公布号 |
EP2025496(A2) |
申请公布日期 |
2009.02.18 |
申请号 |
EP20080161990 |
申请日期 |
2008.08.07 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
SILVI, NORBERTO;CAO, YANG;TAN, DANIEL QI;IRWIN, PATRICIA CHAPMAN;SCHUMAN, KEVIN EDWIN |
分类号 |
B29C47/88;B29C47/00;B29C55/04;B29C55/06;B29D7/01 |
主分类号 |
B29C47/88 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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