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US 12,716,173 B2Granted
Barrier paper or barrier film comprising highly refined pulp from fibers obtained from used beverage cartons
AssigneeStora Enso OYJ
InventorsCarl-Henrik Ljungqvist, Kaj Backfolk
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Abstract
The present invention relates to a barrier paper or barrier film for a food or liquid packaging laminate, said barrier paper or barrier film comprising: a substrate layer comprising a highly refined cellulose composition comprising fibers obtained from used beverage cartons (UBC), and a polymeric gas barrier coating disposed on at least one side of the substrate layer.
Claims14
A barrier paper or barrier film for a food or liquid packaging laminate, said barrier paper or barrier film comprising:
- a substrate layer comprising a highly refined cellulose composition comprising fibers obtained from used beverage cartons (UBC), and
- a polymeric gas barrier coating disposed on at least one side of the substrate layer, wherein the highly refined cellulose composition has a Schopper-Riegler (SR) number in a range of 50-100, as determined by standard ISO 5267-1.
A method for manufacturing a barrier paper or barrier film for a food or liquid packaging laminate, said method comprising:
- a) providing a pulp suspension comprising a highly refined cellulose composition comprising fibers obtained from used beverage cartons (UBC) having a Schopper-Riegler (SR) number in a range of 50-100, and optionally a less refined cellulose composition having a Schopper-Riegler (SR) number in a range of 20-40, as determined by standard ISO 5267-1;
- b) forming a paper or film substrate layer from the pulp suspension;
- and
- c) coating at least one side of the paper or film substrate layer with a polymeric gas barrier coating to obtain the barrier paper or barrier film for a food or liquid packaging laminate.
1 more element
Dependencies are inferred from the claim text.