Method of manufacturing a multi-layer packaging laminate and packaging laminate obtained by the method
AssigneeTetra Laval Holdings & Finance S.A.
InventorsMikael Berlin, Mats Bentmar, Katarina Flemmer
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Abstract
A multi-layer packaging laminate is produced by simultaneously applying at least two wet coating layers to a substrate web (10) in a slide coater or curtain coater having a slide block (14) over which laminar flow streams of coating liquid flow to reach the substrate web. At least one layer is less than 20 μm thick (wet) and at least one layer has oxygen barrier or scavenger properties.
Claims12
A method of producing a multi-layer packaging laminate comprising a substrate bearing at least two superposed coating layers, wherein the substrate is paper or paperboard and the method comprises applying wet coating layers to said substrate to provide wet superposed layers thereon and drying said layers, the wet coating layers include, in the following order, (i) ethylene acrylic acid, (ii) polyvinyl alcohol and nanoparticles, (iii) ethylene acrylic acid and polvyinyl alcohol, (iv) polyvinyl alcohol and nanoparticles and (v) ethylene acrylic acid.
A method of producing a multi-layer packaging laminate comprising a substrate bearing at least two superposed coating layers, wherein the method comprises:
- applying five or more wet coating layers to said substrate to provide wet superposed layers thereon, herein the substrate is paper or paperboard and the wet coating layers include, in the following order, (i) ethylene acrylic acid, (ii) polvinyl alcohol and nanoparticles, (iii) ethylene acrylic acid and polyvinyl alcohol, (iv) polyvinyl alcohol and nanoparticles and (v) ethylene acrylic acid;
- and
- drying said layers,
- wherein the wet coating layers are in solution or dispersed in a carrier liquid and at least one of the wet superposed layers has a thickness of no more than 20 μm.
Dependencies are inferred from the claim text.