Patent ID: 8409679

Claim:
Non-foil packaging laminate having barrier properties suitable for long term packaging of a liquid food product, comprising a core layer of paper or paperboard, a first outermost liquid tight, heat sealable polyolefin layer, a second innermost liquid tight, heat sealable polyolefin layer and, applied onto the inner side of the core layer of paper or paperboard, an oxygen gas barrier layer formed by liquid film coating of a liquid gas barrier composition and subsequent drying, the liquid composition containing a polymer binder providing gas barrier properties, dispersed or dissolved in an aqueous or solvent-based medium, wherein the gas barrier layer further contains inorganic particles dispersed within the polymer binder in combination with that the packaging laminate further comprises a water vapour barrier layer, arranged between said applied oxygen gas barrier layer and said innermost heat sealable polyolefin layer, which water vapour barrier layer comprises a polyolefin-based matrix polymer and inorganic filler particles distributed within the matrix polymer.