Method of manufacturing embossed films of partially acetalised polyvinylalcohol

摘要

Embossing a film based on partially acetalized polyvinyl alcohol comprises embossing each surface of a partially acetalized polyvinyl alcohol-based film (a) between a correspondingly roughened embossing roller (b) at 80-170[deg]C and a pressing roller (c) at 0-60[deg]C to obtain a film having an embossed surface and a roughness R z of 20-100 mu m. Each pressing roller has a Shore A hardness of 50-80. Each film surface has an initial roughness R z of 1-70 mu m. An independent claim is included for a laminate comprising glass pane(s) and/or polymer pane(s) and structured film(s).