Method of treating mechanical pulp with a phenol-oxidizing enzyme system
AssigneeNovo Nordisk Biochem North America, Inc.
InventorsTomas Tage Hansen, Peder Holk Nielsen
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Abstract
A process for producing paper or paperboard from mechanical pulp, in which the pulp is treated with a phenol-oxidizing enzyme after mechanical refining of the pulp has been completed. The resulting paper exhibits an increased strength relative to paper produced from untreated pulp.
Claims8
A method for increasing the strength of a paper or paperboard product produced from a mechanical pulp, the method comprising treating a mechanical pulp with a phenol-oxidizing enzyme system after mechanical refining of said pulp has been completed, under conditions that allow cross-linking of surface lignin in said pulp, wherein said pulp does not contain an added binding agent and wherein a paper or paperboard product produced from the treated pulp exhibits an increased strength relative to a paper product produced from non-treated pulp.
Dependencies are inferred from the claim text.