TRAMFLOC, INC. - More Than You Really Want To Know About Polymers

Retention Aid | pulp paper mill

Retention Aid Systems - paper tech - product - ACAT

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  • Why is a retention aid important for papermaking?
  • That shows up in reduced drainage rates, for instance, when you block pores in the forming sheet. The change in web properties is thus important for papermaking and depends how you operate a retention aid system. There are retention aids which reduce drainage and those which hardly affect drainage; some people even claim improved drainage.
  • What are retention aids in the paper industry?
  • The substances normally referred to as retention aids in the paper industry are organic, water-soluble high molar-mass polymers. The main consideration in the design of manufacturing processes is to achieve optimum retention and drainage.
  • Do polymeric retention aids improve papermaking system closure?
  • On the other hand, high charge density, low molecular weight polymeric retention aids showed little improvement both in retention and drainage. The best retention system selected from the laboratory experiment was applied on a paper machine producing linerboard to evaluate its effect on papermaking system closure.
  • How are fillers and fines retained in a paper machine?
  • Retention of fillers and fines can result from deposition on fibers, either freely suspended in the papermaking suspension or immobilized in the forming sheet, or by capturing fines and filler aggregates in the sheet by mechanical entrapment. Aggregates are more likely to be formed in the short circulation loop than on the paper machine.