Barrier-coated cellulose-based substrate, laminated packaging material and packaging container comprising the cellulose-based substrate
AssigneeTetra Laval Holdings & Finance S.A.
InventorsPeter ÖHMAN, Mikael BERLIN
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Abstract
The present invention relates to barrier-coated cellulose-based substrates and to a method of manufacturing such cellulose-based substrates, by dispersion coating of a barrier pre-coating and subsequent vapour deposition coating of a barrier deposition coating. The invention further relates to laminated packaging materials comprising the barrier-coated celluose-based substrates, in particular intended for liquid carton food packaging, and to liquid carton packaging containers comprising the laminated packaging material.
Claims18
Barrier-coated cellulose-based substrate, for use as a barrier sheet in a laminated packaging material for liquid food products, comprising a cellulose-based substrate and applied on a first side of the cellulose-based substrate a barrier pre-coating, applied by dispersion or solution coating, and further onto the barrier pre-coating a barrier deposition coating, the barrier deposition coating being applied by a vapour deposition method, wherein the barrier-coated cellulose-based substrate further comprises a base layer pre-coating, which is different from the barrier pre-coating and applied by dispersion or solution coating onto the cellulose-based substrate and thus positioned directly adjacent and contacting the first side of the cellulose-based substrate layer, and positioned beneath the barrier pre-coating, the barrier-coated cellulose-based substrate thus being suitable for providing gas and water vapour barrier properties in a laminated packaging material and packages made thereof.
Dependencies are inferred from the claim text.