Polyacrylamide for paper mills is widely used as retention agent, filter aid, leveling agent, water treatment agent, etc. in the field of papermaking. Its function is to improve the quality of paper, improve the dewatering performance of the slurry, increase the retention rate of fine fibers and fillers, and reduce the consumption of raw materials and environmental pollution. The effect used in papermaking depends on its average molecular weight, ionic properties, ionic strength and the activity of other copolymers. Non-ionic PAM is mainly used to improve the filterability of pulp, increase the strength of dry paper, and increase the retention of fibers and fillers; anionic copolymers are mainly used as dry and wet strengthening agents and retention agents for paper; cationic copolymers are mainly used It is used for papermaking wastewater treatment and filter aid, and it also has a good effect on increasing the retention rate of fillers. In addition, polyacrylamide PAM is also used in papermaking wastewater treatment and fiber recycling.

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