The polyacrylamide dispersant in the paper industry is mainly a cationic polyacrylamide with a relatively low molecular weight. Because its molecular chain contains carboxyl groups, it has a dispersing effect on negatively charged fibers, can increase the viscosity of the pulp, is conducive to fiber suspension, and can effectively It can improve the uniformity of paper, and it is a high-efficiency dispersant for long fibers. Amphoteric polyacrylamide is used as a flocculant for water treatment in the paper industry. Its amide group can form hydrogen bonds with many substances in wastewater, so it can adsorb the particles dispersed in water together and agglomerate them. Facilitates settling and filtration of particulates. Compared with other inorganic flocculants, amphoteric polyacrylamide has the advantages of complete varieties, less consumption in production, fast settling speed, less production sludge, and simple post-treatment, etc., which can meet the requirements of different wastewater treatment.
To sum up, polyacrylamide plays an important role in the paper industry. It can be used as paper leveling agent, strengthening agent, dispersant, filter aid, etc. Its purpose is to improve the uniformity of paper, effectively improve the quality and strength of paper, and also improve the retention rate of fillers and fine fibers, reducing Reduce the loss of raw materials, improve filtration recovery efficiency and reduce environmental pollution.
CPAM is used as a reinforcing agent, through the formation of ionic bonds between cations and anions on the fibers, it can be adsorbed on the pulp fibers, while the amide groups combine with the hydroxyl groups on the fibers to form hydrogen bonds, which enhances the binding force between fibers. Increase paper strength.The addition sequence of APAM plus rosin and aluminum sulfate can also get better reinforcement effect when used in pulp, but the reinforcement effect of APAM will decrease with the increase of filler content.
Post time: Mar-07-2023