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AssigneeTetra Laval Holdings & Finance S.A.
InventorsUlf Nyman, Mats Aldén, Olivia Markbo, Fredrik Nordström
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The disclosure relates to the use of a high-density paper substrate made from cellulose fibres, as a gas-barrier material in a laminated packaging material for packaging of oxygen sensitive products, and further to coated such high-density paper substrates for increased gas barrier properties. Also disclosed are laminated packaging materials comprising the high-density paper substrates or coated high-density paper substrates, and packaging containers comprising the laminated packaging material, for packaging of oxygen-sensitive products.
Use of a high-density paper substrate made from cellulose fibres, as a gas-barrier material in a laminated packaging material for packaging of liquid, semi-liquid or viscous food products or water, wherein the high-density paper substrate has a grammage from 30 to 75 g/m2, as measured according to ISO 536:2012, a density above 1000 kg/m3, as measured according to ISO 534:2011, and is impregnated, at a top-side surface of the paper, with an impregnating composition comprising an impregnating polymer selected from the group consisting of polyvinyl alcohol, PVOH, ethylene vinyl alcohol, EVOH, starch, starch derivatives, carboxymethyl cellulose, nanocrystalline cellulose, NCC, and blends of two or more thereof, wherein the amount of impregnated polymer is from 0.3 to 4.0 g/m2.
Dependencies are inferred from the claim text.