Barrier-coated cellulose-based substrate for laminated packaging material
AssigneeTetra Laval Holdings & Finance S.A.
InventorsUlf NYMAN, Olivia MARKBO, Mats ALDÉN, Konstantin KRIECHBAUM, Renato Augusto Pereira DAMÁSIO, Sergio Eduardo DE OLIVEIRA CAMPOS, Ricardo BATISTA, Allan Francisco HORCHULHAK
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Abstract
The present invention relates to a barrier-coated cellulose-based substrate and to a method of manufacturing such cellulose-based substrates, by dispersion coating of a ductile base layer pre-coating and subsequent dispersion coating of a gas barrier composition and/or vapour deposition coating of a barrier deposition coating.
Claims26
Barrier-coated cellulose-based substrate, for use as a gas barrier sheet in a laminated packaging material for oxygen-sensitive products, comprising
- a cellulose-based substrate having a density of at least 900 kg/m3, and a grammage from 30 to 80 g/m2, and
- applied on a first side of the cellulose-based substrate, at least one gas barrier coating of at least one gas barrier material to a total thickness from 2 to 7000 nm, the gas barrier material excluding nanocrystalline cellulose, NCC,
- wherein the barrier-coated cellulose-based substrate further comprises a ductile base layer pre-coating,
- which is applied by dispersion coating and subsequent drying, onto the surface of the first side of the cellulose-based substrate and positioned beneath the at least one gas barrier coating,
- the barrier-coated cellulose-based substrate thus being suitable for providing gas barrier properties in a laminated packaging material and in packages made thereof.
Dependencies are inferred from the claim text.