Papermaking process with improved drainage and retention

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