Barrier coating for paper and paperboard
AssigneeStora Enso OYJ
InventorsÅsa Nyflött, Chris Bonnerup, Isabel Knöös, Anders Karlsson
Life of this patent
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Abstract
The present invention relates to an aqueous barrier coating composition comprising: 20-80% by weight of a dissolved first polysaccharide having a first degree of polymerization (DP1) of at least 150, based on the total solids content of the aqueous barrier coating composition; and 20-80% by weight of a dissolved second polysaccharide having a second degree of polymerization (DP2) of 100 or less, based on the total solids content of the aqueous barrier coating composition; wherein the ratio of DP1:DP2 is at least 10:1; and wherein the aqueous barrier coating composition has a total solids content in the range of 10-90% by weight.
Claims32
An aqueous barrier coating composition comprising:
- 20-80% by weight of a dissolved first polysaccharide having a first degree of polymerization (DP1) of at least 150, based on a total solids content of the aqueous barrier coating composition;
- and
- 20-80% by weight of a dissolved second polysaccharide having a second degree of polymerization (DP2) of 100 or less, based on the total solids content of the aqueous barrier coating composition;
- wherein a ratio of DP1:DP2 is at least 10:1;
- and
- wherein the total solids content of the aqueous barrier coating composition is in a range of 10-90% by weight.
A barrier film or coating comprising:
- 20-80% by weight of a first polysaccharide having a first degree of polymerization (DP1) of at least 150, based on a total solids content of the barrier film or coating;
- and
- 20-80% by weight of a second polysaccharide having a second degree of polymerization (DP2) of 100 or less, based on the total solids content of the barrier film or coating;
- wherein the ratio of DP1:DP2 is at least 10:1.
Dependencies are inferred from the claim text.