A method for improving grease and oil resistance of a fiber based article
AssigneeKemira Oyj
InventorsMarkus KVIST, Sami PUTTONEN, Kimmo STRENGELL, Leif ROBERTSÉN, Matti HIETANIEMI
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Abstract
There is provided a method for improving grease and oil resistance of a moulded fiber based article comprising introducing to a fiber stock a composition comprising a synthetic polymer component and a cationic polymer component and thermoforming the fiber stock. There is also provided a moulded fiber based article and a use of the composition improving grease and oil resistance of a moulded fiber based article. There is also provided a method for preparation of a moulded fiber based article.
Claims28
A method for improving grease and oil resistance of a moulded fiber based article, the method comprising
- obtaining a fiber stock comprising cellulosic fibers,
- introducing to the fiber stock a composition comprising
- a synthetic polymer component, which is a copolymer of acrylamide and at least one anionic monomer, the polymer component having an anionicity of 1-60 mol-%, and
- a cationic polymer component,
- the synthetic polymer component and cationic polymer component providing the composition with a charge density in the range of
- 0.05-1 meq/g, when measured at pH 2.8, and
- −0.2-−3 meq/g, when measured at pH 7.0,
- optionally introducing polyamidoamine-epichlorohydrin, glyoxalated polyacrylamide, starch or a mixture thereof to the fiber stock, and
- moulding the fiber stock.
(canceled)
Dependencies are inferred from the claim text.