Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1991-01-25
1992-03-24
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
1621682, 1621683, 1621811, 162183, D21H 1734
Patent
active
050985205
ABSTRACT:
A papermaking process includes the steps of adding to the papermaking celllulosic slurry first a high molecular weight cationic polymer and then a medium weight anionic polymer. The cationic polymer is added after the addition of filler, but before at least one of the shear stages to which the slurry is subjected prior to sheet formation and drainage. The anionic polymer is added after the shear stage which is subsequent to the addition of the cationic polymer.
REFERENCES:
patent: 3021257 (1962-02-01), Stauffenberg
patent: 3117944 (1964-01-01), Harrell
patent: 4388150 (1983-06-01), Sunden et al.
patent: 4643801 (1987-02-01), Johnson
patent: 4749444 (1988-06-01), Lorz et al.
patent: 4753710 (1988-06-01), Langley et al.
patent: 4874466 (1989-10-01), Savino
patent: 4913775 (1990-04-01), Langley et al.
"Pulp and Paper", John Wiley & Sons, Inc., 3rd Ed., 1981, pp. 1448-1458 and 1602-1603.
"Microparticles in Wet End Chemistry", Retention and Drainage Short Course, 1989, Washington, D.C., Tappi Press, Atlanta, Ga., Kurt Moberg.
"Silicates in Paper Products Improve Strength and Function Performance", James S. Falcone et al., Pulp & Paper, Jan. 1976, pp. 93-96.
Chin Peter
Epple Donald G.
Miller Robert A.
Nalco Chemcial Company
Norek Joan I.
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