Abstract: A method is presented for fixing an opening device to a packaging container made of a composite film. The packaging container is a tubular bag, and the composite film includes a barrier layer and a further layer. The barrier layer is part of the composite film and the further layer includes a recess in the region of the opening device. The opening device is a connecting flange configured to be fixed to the composite film and includes a separating mechanism configured to sever the barrier layer to form a passage in the composite film. The further layer is arranged on the side facing away from the connecting flange.

Abstract: The invention relates to a method for producing a composite film (15; 15a; 15b; 15c) for a tubular bag (1), wherein the composite film (15; 15a; 15b; 15c) consists of a plurality of layers (16; 16a; 16b, 17, 18; 18a, 23, 24; 24a, 25; 25a; 26, 27; 29) that are interconnected, wherein at least one of the layers (16; 16a; 16b, 17, 18; 18a, 23, 24; 24a, 25; 25a; 26, 27; 29) is designed as a barrier layer (16; 16a; 16b, 17, 18; 18a; 27; 29), and wherein at least one further layer (23, 24; 24a, 25; 25a, 26; 29) is provided that has a recess (30; 30a).