公开(公告)号：US5076987A

公开(公告)日：1991-12-31

申请号：US504482

申请日：1990-04-04

申请人： Joachim Wank ,  Hans L. Weber ,  Claus Burkhardt ,  Dieter Freitag ,  Bernhard Schulte ,  Werner Waldenrath

发明人： Joachim Wank ,  Hans L. Weber ,  Claus Burkhardt ,  Dieter Freitag ,  Bernhard Schulte ,  Werner Waldenrath

IPC分类号： B29C59/00 ,  B29C43/22 ,  B29C47/00 ,  B29C59/04 ,  B29C71/00 ,  B29D7/01 ,  B29D11/00

CPC分类号： B29C43/222 ,  B29D11/00 ,  B29D7/01 ,  B29C47/00 ,  B29C47/0021 ,  B29K2069/00 ,  B29K2995/0022 ,  B29K2995/0024 ,  B29K2995/0045

摘要： A process for the production of optically isotropic extrusion films is disclosed. Accordingly in a first process step a thermoplsatic resin is extruded to form a film having a thickness below 600 .mu.m. The second process step entailsa) calendering said film between a ground elastic roller and a high gloss steel roller to produce a film having a high gloss surface and a matt surface, orb) calendering said film between a lacquered elastic roller and a high gloss steel roller to produce a film having high gloss on both surfaces, orc) calendering said film between a ground elastic roller and a high gloss steel roller to produce a film having a high gloss surface and a matt surface, and then coating said matt surface with a melt of said thermoplastic polymer and calendering the resulting coated film between a high gloss steel roller and a ground elastic roller, with the high gloss side of the coated film facing the roller of elastic material.

摘要翻译： 公开了一种制备光学各向同性挤出膜的方法。 因此，在第一工艺步骤中，将热塑性树脂挤出以形成厚度低于600μm的膜。 第二工艺步骤需要a）在接地弹性辊和高光泽钢辊之间压延所述膜以产生具有高光泽表面和无光泽表面的膜，或b）在漆层弹性辊和高光泽度之间压延所述膜 钢辊，以在两个表面上产生具有高光泽度的膜，或c）在接地弹性辊和高光泽钢辊之间压延所述膜以产生具有高光泽表面和无光泽表面的膜，然后涂覆所述亚光表面 用所述热塑性聚合物的熔体将所得的涂膜压延在高光泽的钢辊和研磨的弹性辊之间，涂膜的高光泽面与弹性材料的辊相对。