| 摘要 |
Process for producing a film based on partially acetalized polyvinyl alcohol comprises: providing a film based on partially acetalized polyvinyl alcohol, where a first and second sides of the files have a roughness of 1-30 mu m; and embossing the second side of the film between a roughened embossing roller at 80-170[deg]C and pressing roller at 0-60[deg]C to obtain a film with an embossed surface with a roughness of 20-100 mu m, where the pressing roller has a Shore A hardness of 50-80. An independent claim is included for a laminate comprising polymer films and at least two embossed films, where the polymer films are arranged between the non-embossed sides of the embossed films. |
