| 摘要 |
PURPOSE:To obtain a method for extruding a film by which a foreign matter in molten resin is effectively removed without reducing extrusion output and generation of a fish eye is lowered. CONSTITUTION:A plurality of screens 3 are interposed between an extrusion screw 1 and an extrusion mold 2 and thereby a foreign matter in molten resin is removed. In this method for extruding a film, a collected screen body is used wherein coarse mesh screens A are interposed between fine mesh screens C. |
