Papermaking process with improved drainage and retention

Details Papermaking process with improved drainage and retention Papermaking process with improved drainage and retention

1992-11-13

1993-11-30

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621681, 162183, D21H 1734

Patent

active

052661644

ABSTRACT:
The invention provides a method for improving the retention of mineral fillers and cellulose fibers on a cellulosic fiber sheet. The method comprising the steps of preparing a cellulose pulp slurry; adding before a shearing step an effective amount of a copolymer flocculant to the cellulose pulp slurry, the copolymer flocculant is a high molecular weight cationic copolymer of acrylamide and diallyl dimethyl ammonium chloride, the flocculant copolymer should contain from about 20 to about 60 mole percent diallyl dimethyl ammonium chloride mer units. After a shearing step adding an effective amount of a high molecular weight water-soluble anionic flocculant. A cellulosic fiber sheet is then formed from the cellulose pulp slurry which includes both the copolymer flocculant and anionic flocculant.

REFERENCES:
patent: 4753710 (1988-06-01), Langley et al.
patent: 4913775 (1990-04-01), Langley et al.
patent: 5098520 (1992-03-01), Begala

Affiliated with

Also associated with

Rating

Papermaking process with improved drainage and retention does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Papermaking process with improved drainage and retention, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Papermaking process with improved drainage and retention will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2092825