The performance of a PEO-cofactor-bentonite retention and drainage aid system on a laboratory twin-wire sheet former

C. Pigeon, G. Garnier, T. G.M. Van De Ven

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A recently developed laboratory twin-wire sheet former (LTSF) has opened the possibility of studying papermaking chemistry and engineering in the laboratory under conditions very similar to those used in industry. In this study we report on the retention of fines and the drainage on an LTSF, using a three-component retention-aid system, consisting of polyethylene oxide (PEO), a cofactor and bentonite. It is shown that retention and drainage experiments on the LTSF are reproducible. With PEO-cofactor systems, fines retention was accompanied by a reduction in drainage whereas, in the presence of bentonite at optimum dosage, similar retention was observed, without the loss of drainage. The observations mimic behaviour seen on industrial paper machines.

Original languageEnglish
Pages (from-to)112-116
Number of pages5
JournalJournal of Pulp and Paper Science
Issue number4
Publication statusPublished - 1 Apr 2004
Externally publishedYes


  • Bentonite
  • Drainage aids
  • Laboratory
  • Paper machines
  • Performance evaluation
  • Polyethylene oxide
  • Reproducibility
  • Retention aids
  • Twin wire machines

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