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.
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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.
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.
Helle, T. (2000). Qualitative and quantitative effects of gas content on papermaking. Paperi Ja Puu 82(7), 457–463.
Helle, T. and Paulapuro, H. (2004). Effect of precipitated gas bubbles in papermaking Appita Journal 57(6), 444–447.
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.
Hoekstra, P. (2007). Improving Washing Efficiencies in the Kraft Pulp Mill with New Defoamer Technology. TAPPI 2007 Engineering, Pulping & Environmental Conference. Orlando. 22–24.
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.
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.
Pietikainen, T. (1992). On-line air entrainment tests on paper machines. TAPPI Journal, 75(11), 185–191.
Rauch, R., and Burke, T. (July 2002). Optimised deaeration leads to substantial process and quality improvements in paper manufacturing. TAPPSA Journal, 22–27.
Schwarz, M., Gmeiner, A., Mannes, W., and Binder, E. (2002). Gear up the wet end. Pulp & Paper Europe, 7(2), 36.
Taber, P. L. (2003). Analyses show entrained air as a contributing factor in sheet barring. Pulp and Paper, 7(9), 46–48.
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.
Watzig, D. and Rauch, R. (2004). Techniques for measuring stock properties. Industria Della Carta, 42(4), 60–72.
Woodworth, M. (1990). Compression of practical methods for air-stock measurements. TAPPI Journal, 73(11), 135–138.
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.
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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
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DOI: https://doi.org/10.1007/978-1-4020-6038-0_4
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