Method of improving filler retention in papermaking

Details Method of improving filler retention in papermaking Method of improving filler retention in papermaking

1996-12-13

1998-07-14

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621813, 1621818, 1621682, 162175, B21F 1100, B21H 1737, B21H 1774

Patent

active

057798591

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.

REFERENCES:
patent: 3151017 (1964-09-01), Bradford
patent: 3813283 (1974-05-01), Urbas
patent: 4798653 (1989-01-01), Rushmere
R.D. Mather et al., "Production of Paper at High Filler Levels", Article, 1982 Papermakers Conference, 7 pages.
Mrs. A.J. Hayes, "Dream of Reality?", the Julius Grant-PMATA Prize, Article, Engineers Workshop, May 23, 1995, 4 pages.
M.C. Riddell et al., "Three Developments at Wolvercote Paper Mill", Article, Apr., 1976, 5 pages.

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