Abstract: A packaging laminate comprising a core layer of paper or carton with a through-going hole, a layer of thermoplastics applied onto one outer side of the core layer, an aluminium foil applied onto the other, inner, side of the core layer and bonded to the core layer by means of an intermediate layer of thermoplastics, the two layers of thermoplastics being sealed to each other within the region of the hole to form a membrane of aluminium foil and thermoplastics, and a first adhesive part-layer applied onto the inner side of the aluminium foil, a second intermediate part-layer of low density polyethylene applied adjacent to the first adhesive part-layer, and a third innermost part-layer comprising in the majority a metallocene polyethylene.

Abstract: A packaging laminate comprising a core layer of paper or carton with a through-going hole, a layer of thermoplastics applied onto one outer side of the core layer, an aluminium foil applied onto the other, inner, side of the core layer and bonded to the core layer by means of an intermediate layer of thermoplastics, the two layers of thermoplastics being sealed to each other within the region of the hole to form a membrane of aluminium foil and thermoplastics, and a first adhesive part-layer applied onto the inner side of the aluminium foil, a second intermediate part-layer of low density polyethylene applied adjacent to the first adhesive part-layer, and a third innermost part-layer comprising in the majority a metallocene polyethylene.

Abstract: A barrier coating against oxygen and water vapor penetration for a plastic packaging film comprising two oxides, one of which is SiO.sub.2 while the other is Al.sub.2 O.sub.3. The barrier is a single layer of mixed oxides in which the concentration of Al.sub.2 O.sub.3 increases continuously from 20% by weight to 80% by weight while the concentration of SiO.sub.2 decreases continuously from 80% by weight to 20% by weight as the thickness of the mixed oxide layer increases from the surface of the plastic film. The plastic film is preferably polyethylene terephthalate or polyphenylene oxide and the barrier coating is transparent.