Method of improving filler retention in papermaking
AssigneeJ.M. Huber Corporation
InventorsRichard Douglas Carter, Britt Ciccrchi
Life of this patent
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Abstract
A method for improving retention of filler in papermaking systems includes a split stream feed to either the head box or fan pump of a papermaking system. The split stream divides the pulp flow into two streams, one stream having a retention aid and filler added thereto. The retention aid and filler-containing stream is then added back to the other stream upstream of the fan pump or head box. Treating only a portion of the overall pulp flow with the filler/retention aid lowers retention aid consumption, improves paper product appearance and maintains or increases filler retention during papermaking.
Claims10
In a method of papermaking wherein a filler is added to a pulp slurry, a retention aid is added to the filler-containing pulp slurry and the pulp slurry with the filler and retention aid are fed to a paper machine, the improvement comprising:
- a) separating the pulp slurry into at least a first and a second stream;
- b) adding the filler and retention aid to the first stream;
- and
- c) adding the first stream containing the filler and retention aid back to the second stream;
- d) whereby said retention aid is subjected to lesser amounts of anionic trash in the pulp slurry due to said separating step.
Dependencies are inferred from the claim text.