Skip to main content

Foam and Entrained Air Management: A Practical Perspective

  • Chapter
  • First Online:
  • 944 Accesses

Abstract

Paper machines and the papermaking process have undergone remarkable changes in terms of chemistry applications and design parameters. These trends increase the likelihood that the stock will foam and generate turbulence, thus allowing air to be drawn in. For example, higher machine speeds and gap former technology cause more air to be present in the white water, which could ultimately lead to foam problems if not managed correctly.

This is a preview of subscription content, log in via an institution.

Buying options

Chapter
USD   29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD   129.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD   169.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD   169.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Learn about institutional subscriptions

References

  • Garrett, P. R. (1980). Preliminary considerations concerning the stability of a liquid heterogeneity in a plane-parallel liquid film. Journal of Colloid Interface Science, 76(2), 587–590.

    Article  CAS  Google Scholar 

  • Gysling, D. and Loose, D. (January 2004). Clamp-on sonar based entrained air measurement for pulp and paper applications. 90th Annual of Pulp and Paper Technical Association of Canada. Montreal, Quebec Canada. vol. B, 109–111.

    Google Scholar 

  • Helle, T. (2000). Qualitative and quantitative effects of gas content on papermaking. Paperi Ja Puu 82(7), 457–463.

    Google Scholar 

  • Helle, T. and Paulapuro, H. (2004). Effect of precipitated gas bubbles in papermaking Appita Journal 57(6), 444–447.

    Google Scholar 

  • Helle, T., Meinander, P. O., Nykaneen, R. J., Molander, K. S., and Paulapuro, H. V. (1999). Air removal mill trials using pomp deaerator. TAPPI Journal, 82(6), 146–149.

    CAS  Google Scholar 

  • Hoekstra, P. (2007). Improving Washing Efficiencies in the Kraft Pulp Mill with New Defoamer Technology. TAPPI 2007 Engineering, Pulping & Environmental Conference. Orlando. 22–24.

    Google Scholar 

  • Matula, J. P. and Kukkamaki, E. (2000). New findings of entrained air and dissolved gases in pm wet end: Mill case study. TAPPI Journa 83(4), 22.

    Google Scholar 

  • Mudaly, G. and Stranges, M. (2006). Bowater Thunder Bay Ontario, kraft mill reduces defoamer usage with new siloxane technology. PAPTAC 92nd Annual Meeting. Montreal: Quebec Canada. 2006 6–10 Feb, vol. B, 231–236.

    Google Scholar 

  • Pietikainen, T. (1992). On-line air entrainment tests on paper machines. TAPPI Journal, 75(11), 185–191.

    Google Scholar 

  • Rauch, R., and Burke, T. (July 2002). Optimised deaeration leads to substantial process and quality improvements in paper manufacturing. TAPPSA Journal, 22–27.

    Google Scholar 

  • Schwarz, M., Gmeiner, A., Mannes, W., and Binder, E. (2002). Gear up the wet end. Pulp & Paper Europe, 7(2), 36.

    Google Scholar 

  • Taber, P. L. (2003). Analyses show entrained air as a contributing factor in sheet barring. Pulp and Paper, 7(9), 46–48.

    Google Scholar 

  • Wang, G., Pelton, R., Hrymak, A., Shawafaty, N., and Hend, Y. (1999). On the role of hydrophobic particles and surfactants in defoaming. Langmuir, 15, 2202–2208.

    Article  CAS  Google Scholar 

  • Watzig, D. and Rauch, R. (2004). Techniques for measuring stock properties. Industria Della Carta, 42(4), 60–72.

    CAS  Google Scholar 

  • Woodworth, M. (1990). Compression of practical methods for air-stock measurements. TAPPI Journal, 73(11), 135–138.

    Google Scholar 

Download references

Acknowledgements

The authors wish to acknowledge the special and invaluable contribution made to this chapter by Mr. Angelo N. Melchiorre, Mr. Patrick D. Blaskowski, Mr. Glenn D. Mudaly and Mr. Ryan Forrest.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Sal Mirza .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2009 Springer Science+Business Media B.V

About this chapter

Cite this chapter

Mirza, S., Hoekstra, P.M. (2009). Foam and Entrained Air Management: A Practical Perspective. In: Thorn, I., Au, C. (eds) Applications of Wet-End Paper Chemistry. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6038-0_4

Download citation

Publish with us

Policies and ethics