FIELD: packaging industry.
SUBSTANCE: invention relates to the foil-free laminate packaging material (10) for packaging of liquid food products, comprising a first paper layer (11) located closer to the inner side of the laminate packaging material, and a second paper layer (12) located closer to the outer side of laminate packaging material, and the said first and second paper layers are laminated to each other by the first intermediate adhesive layer (13) in the form of a sandwich structure, and the laminate packaging material additionally comprises a gas-barrier coating layer (14) applied on the inner side of the first paper layer by liquid-film applying a liquid gas barrier composition onto the said first paper layer and by subsequent drying, and the liquid composition comprises a polymer binder dispersed or dissolved in an aqueous medium or in a solvent medium, and an additional steam-moisture barrier layer (15) laminated and attached to the inner side of the first paper layer with the barrier coating by the second intermediate polymer binding layer (16). At that the laminated packaging material additionally comprises an innermost layer of liquid impermeable, heat sealable thermoplastic polymer material (17) applied on the inner side of the said additional steam-moisture barrier layer (15) and the outermost layer of liquid impermeable, heat sealable thermoplastic polymer material (18) on the opposite side of the laminated packaging material, applied on the outer side of the second, main paper layer, and the said first intermediate binding layer and the second intermediate binding layer are selected from polyolefins and polyolefin-based copolymers. The invention also relates to a method of manufacturing the laminated packaging material and to a packaging container which is produced from this laminated packaging material.
EFFECT: invention enables to obtain a laminated packaging material having good gas barrier properties, suitable for long-term, antiseptic packing, and good inner adhesion between the layers.
26 cl, 7 dwg
