Apparatus for improving filler retention in papermaking

Details Apparatus for improving filler retention in papermaking Apparatus for improving filler retention in papermaking

1998-01-03

2000-07-11

Fortuna, Jose

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162264, 162315, 162252, D21F 100

Patent

active

060867183

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.

REFERENCES:
patent: 3151017 (1964-09-01), Brafford
patent: 3716449 (1973-02-01), Gatward et al.
patent: 3813283 (1974-05-01), Urbas
patent: 4798653 (1989-01-01), Rushmere
patent: 5695609 (1997-12-01), Petander et al.
R.D. Mather et al., "Production of Paper at High Filler Levels", Article, 1982 Papermakers Conference, 7 pgs.
Mrs. A.J. Hayes, "Dream or Reality?", The Julius Grant-PMATA Prize, Article, Engineers Workshop, May 23, 1995, 4 pgs.
M.C. Riddell et al., "Three Developments at Wolvercote Paper Mill", Article, Apr., 1976, 5 pgs.

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