papermaking retention agent/polyacrylamide powder in canada

papermaking retention agent/polyacrylamide powder in canada
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  • Why is polyacrylamide used in paper industry?
  • Polyacrylamide (PAM) in paper industry is widely used as retention agent, filter aid, homogenizer, and water treatment agent and so on. Its function is to improve the quality of paper, improve the pulp dehydration performance, improve the retention of fine fibers and fillers, and reduce the consumption of raw materials and environmental pollution.
  • Can polyacrylamide be used as paper dispersant?
  • Polyacrylamide could be used as paper dispersant, paper residence filter aid. The paper fibers and fillers in pulp are hydrophobic and tend to flocculate into clusters. It is difficult to produce paper with uniform properties and good strength. The addition of polyacrylamide promotes the dispersion of paper fibers and the formation of paper.
  • Which retention aids are used in papermaking?
  • This is due to its high efficiency at relatively low amounts (typically of the order of 0.5 kg retention aid agent per 1 ton of dry weight papermaking fibre) . Polyacrylamides (PAM) and polyethylenimine (PEI) (Fig. 7) are the retention aids most used in papermaking. Other less used groups of products are polyamines and poly-DADMAC compounds.
  • Are non ionic polyacrylamides effective as retention aids?
  • Non-ionic polyacrylamides, although somewhat effective as retention aids, are essentially non-substantive to fibres. Anionic groups can, however, be formed on the polyacrylamide by introducing sodium acrylate or acrylic acid to the monomer solution to form a copolymer.