Laminated packaging material, packaging containers manufactured therefrom

Laminated cellulose-based packaging material to be heat-sealed into aseptic packaging containers containing liquid- or semi-liquid food product, comprising:

• a bulk material layer of paper, paperboard or other cellulose-based material;
• an innermost, heat sealable and liquid-tight layer of a thermoplastic polymer that directly contacts the liquid- or semi-liquid food product in the aseptic packaging containers when the laminated packaging material is heat-sealed into the aseptic packaging containers containing the liquid- or semi-liquid food product;
• a barrier layer between the bulk material layer of paper, paperboard or other cellulose-based material and the innermost, heat sealable and liquid-tight layer of thermoplastic polymer, the barrier layer being a compact-surface barrier paper, the compact-surface barrier paper having a density of 800 kg/m3 or higher, a surface smoothness value below 300 ml/minute Bendtsen (ISO 8791-2), a thickness of 60 μm or lower, a grammage of from 20 to 40 g/m2, a wet strength from 0.4 to 0.6 kN/m (ISO 3781) and an air permeance below 2.0 nm/Pas (SCAN P26);
• a pre-coating material applied to a surface of the compact-surface barrier paper facing the innermost, heat sealable and liquid-tight layer of thermoplastic polymer so that the compact-surface barrier paper has a pre-coating surface, the pre-coating material being a barrier material selected from the group consisting of polyvinyl alcohol (PVOH), ethylene vinyl alcohol (EVOH), starch and starch derivatives, cellulose and cellulose derivatives, and other polysaccharides and polysaccharide derivatives, polyvinylidene chloride (PVDC), and polyamides;
• a vapour deposition barrier coating on the pre-coating surface of the compact- surface barrier paper, the vapour deposition barrier coating being a metallisation coating having an optical density higher than 1.5 or a diamond-like carbon coating.

Laminated non-foil cellulose-based packaging material to be heat-sealed into aseptic packaging containers containing liquid- or semi- liquid food product, comprising:

• a bulk material layer of paper, paperboard or other cellulose-based material;
• an innermost, heat sealable and liquid-tight layer of a thermoplastic polymer that directly contacts the liquid- or semi-liquid food product in the aseptic packaging containers when the laminated packaging material is heat-sealed into the aseptic packaging containers containing the liquid- or semi-liquid food product;
• a barrier layer between the bulk material layer of paper, paperboard or other cellulose-based material and the innermost, heat sealable and liquid-tight layer of thermoplastic polymer, the barrier layer being a compact-surface barrier paper, the compact-surface barrier paper having a density of 800 kg/m3 or higher, a surface smoothness value below 300 ml/minute Bendtsen (ISO 8791-2), a thickness of 60 μm or lower, a grammage of from 20 to 40 g/m2, a wet strength from 0.4 to 0.6 kN/m (ISO 3781) and an air permeance below 2.0 nm/Pas (SCAN P26);
• a vapour deposition barrier coating providing barrier properties against oxygen and/or light, the vapour deposition barrier coating being between the compact-surface barrier paper and the innermost, heat sealable and liquid-tight layer of thermoplastic polymer.