Patent ID: 6495214
Filing Date: 2002-12-17
Classification: B29C

Abstract:
A method of producing a composite film or layer with a first layer having a 3-dimensional surface structure at least on a first side of a base film and, on an other side of the base film, a second layer having a 3-dimensional structural or two-dimensional pattern, which pattern is in register with the surface structure of the first layer, said method comprisingapplying a layer of thermoplastic polymer to the base film fed to a second roller, provided with a circumferential structure, via a first roller, wherein the first and second rollers are driven in approximately equally fast, but opposite rotation, wherein the second roller contacts the polymer to provide the 3-dimensional surface structure on the polymer layer so as to provide the first layer, and in which method there is a third roller, which is arranged downstream of the second roller, and is driven approximately equally fast and in the opposite direction to the second roller and is likewise provided with a structural or 2-dimensional pattern, and applying a further layer of thermoplastic, radiation-curable polymer material to the other side of the base film, which has been fed to the third roller via the second roller and was already coated at least on the first side, wherein the third roller contacts the further polymer layer to provide the 3-dimensional structural or two-dimensional pattern on the further polymer layer so as to provide the second layer, and radiation curing the further polymer layer on the outer, other side of the base film.