IMPROVEMENT IN THE DEWATERING OF WET PAPER WEBS USING MANNICH ACRYLAMIDE POLYMERS

摘要

Dewatering of wet paper webs in general and particularly under high vacuum is improved by the addition of a Mannich acrylamide polymer having a molecular weight of not greater than about 300,000 to an aqueous slurry of papermaking fibers having a pH less than about 5.5.