Water-, oil- and grease-resistant multilayer coating for paper-based substrate and uses thereof
AssigneeCascades Groupe Produits SpéCialiséS
InventorYvon Mongrain
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Abstract
The present invention relates to a water-, oil- and grease-resistant multilayer coating for a paper-based substrate comprising a water-based inner primer coating, an intermediate polymeric extrusion coating, and a water-based top barrier coating, wherein a surface of the paper-based substrate coated therewith has water, oil and grease barrier properties, and wherein the paper-based substrate coated therewith is repulpable and recyclable.
Claims22
A water-, oil- and grease-resistant multilayer coating for a paper-based substrate comprising:
- a water-based inner primer coating comprising 0.01 g/m2 of polyethyleneimine (PEI);
- an intermediate polymeric extrusion coating comprising 10 g/m2 of co-extruded low-density polyethylene (LDPE) and high-density polyethylene (HDPE) by weight ratio about 40/60 respectively;
- and
- 5 g/m2 of a water-based top barrier coating,
- wherein a surface of the paper-based substrate coated therewith has water, oil and grease barrier properties, and wherein the paper-based substrate coated therewith is repulpable and recyclable.
The water-, oil- and grease-resistant multilayer coating of claim-12, wherein the low surface tension polymer consists of low density polyethylene (LDPE).
The water-, oil- and grease-resistant multilayer coating of claim-11, wherein the polymer to be extruded or co-extruded is selected from the group consisting of polyethylene (PE), polylactic acid (PLA), PBS, PBAT, PP, PET, Nylon, EVOH, EMA, and combinations thereof.
The water-, oil- and grease-resistant multilayer coating of claim-16 further comprises an inorganic extrusion master batch as a filler.
A water-, oil- and grease-resistant multilayer coating for paper-based substrate, comprising:
- an inner water-based primer coating comprising 0.01 g/m2 of polyethyleneimine (PEI);
- an intermediate polymeric extrusion coating comprising 10 g/m2 of co-extruded low-density polyethylene (LDPE) and high-density polyethylene (HDPE) in a three-layers HDPE-LDPE-HDPE arrangement where HDPE represents 60% by weight of the total weight of the intermediate polymeric extrusion coating;
- and
- 5 g/m2 of a top water-based barrier coating.
Dependencies are inferred from the claim text.