PRODUCTION OF FLEXIBLE FILMS

摘要

A method for creating lines or areas of weakness 5 in a multilayer flexible film is disclosed. The method comprises creating small cracks in a layer or layers of a film by feeding the layer or layers through a nip between a pair of rolls, where one of the rolls in the nip has a series of raised features, and where the size, shape, or 10 planar position of the raised features are accurately controlled. The method also comprises laminating the weakened layer or layers to one or more than one other film layer to create the multilayer film. 6153890_1 (GtHattrs) P72088.AU.2 KRYSTALM 27/01/15