Back to results
US 2024/0167227 A1Published application
Barrier coatings applied to nanocellulose-coated paper and paperboard
AssigneeFiberLean Technologies Limited
InventorsThomas REEVE-LARSON, Mark PARADIS, Jonathan PHIPPS, Per SVENDING, Daniel INGLE, David SKUSE
Life of this patent
Estimating the term…
Abstract
Methods and systems for applying barrier coatings to nanocellulose-coated paper and paperboard.
Claims165
A method of manufacturing a multi-ply paper or paperboard product, the method comprising:
- (a) providing a consolidating base sheet of pulp following a headbox of a paper or paperboard machine;
- (b) applying two or more layers of one or more nanocellulose-containing compositions onto the consolidating base sheet to form a consolidating multi-layer paper or paperboard structured material;
- and
- (c) at a size press section of the paper or paperboard machine, applying a layer to the top of the consolidating multi-layer paper or paperboard structured material, wherein the layer comprises at least one of ethylene vinyl alcohol (EVOH), polyvinyl alcohol (PVOH), starch, surface sizing agent microcrystalline cellulose, and nanocrystalline cellulose,
- wherein:
- (i) a first layer of nanocellulose-containing composition is applied to the consolidating base sheet in an amount ranging from about 0.1 g/m2 to about 20 g/m2,
- (ii) a second layer of nanocellulose-containing composition is applied to the consolidating base sheet in an amount ranging from about 1 g/m2 to about 20 g/m2, and
- (iii) at least one of the first or second layers of nanocellulose-containing composition is applied by spraying.
5 more elements
A system for producing a paper or paperboard, the system comprising:
- a headbox configured to output a consolidating base sheet;
- means for sequentially applying two or more layers of a nanocellulose-containing composition onto the surface of the consolidating base sheet, wherein at least one of the two or more layers is sprayed onto the consolidating base sheet;
- and
- a size press section comprising means for applying a layer to the top of the consolidating base sheet, wherein the layer comprises at least one of ethylene vinyl alcohol (EVOH), polyvinyl alcohol (PVOH), starch, surface sizing agent, microcrystalline cellulose, and nanocrystalline cellulose.
1 more element
A system of producing a paper or paperboard, the system comprising:
- a headbox configured to output a consolidating base sheet;
- a first means for applying a first layer of a first nanocellulose-containing composition onto the surface of the consolidating base sheet;
- a second means for applying a second layer of a second nanocellulose-containing composition onto the surface of the consolidating base sheet;
- and
- a size press section comprising means for applying a layer to the top of the consolidating base sheet, wherein the layer comprises at least one of ethylene vinyl alcohol (EVOH), polyvinyl alcohol (PVOH), starch, surface sizing agent, microcrystalline cellulose, and nanocrystalline cellulose,
- wherein at least one of the first layer or the second layer is sprayed onto the consolidating base sheet.
3 more elements
Dependencies are inferred from the claim text.