Apparatus for improving filler retention in papermaking
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United States of America Patent
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Jul 11, 2000
Issued Date -
N/A
app pub date -
Jan 3, 1998
filing date -
Dec 13, 1996
priority date (Note) -
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Abstract
An apparatus 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.
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