Method of minimizing untoward effect of contaminants, such as pitch, in the papermaking operation
AssigneeHercules Incorporated
InventorRobert J. Leahy
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Abstract
Disclosed is a method of minimizing the untoward effect of contaminants, such as pitch and related materials, in the papermaking operation. An aqueous dispersion of water-dispersible synthetic pulp, such as polypolyolefin pulp, is added to a pulp slurry comprised of cellulosic pulp, at a point prior to sheet formation. The synthetic pulp adsorbs a substantial amount of the pitch present in the pump slurry and prevents it from depositing on the papermaking apparatus.
Claims3
In the method of manufacturing paper from an aqueous dispersion of cellulosic pulp containing pitch and wherein there is incorporated in the cellulosic pulp, prior to sheet formation, a material to reduce the untoward effects of the pitch on the papermaking operation, the improvement which comprises adding to the cellulosic pulp, prior to sheet formation, a water-dispersible polyolefin pulp, the amount of polyolefin pulp employed being by weight (dry basis) from about 0.05% to about 0.25% based on the dry weight of the cellulosic pulp.
Dependencies are inferred from the claim text.