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The use of ultrasonic waves to excite pulp fibers and to disrupt fiber mats on the forming board has great potential to enhance both dewatering and formation with benefits in both paper quality and fiber savings. In this paper we present results of experiments to determine the ability of 150 kHz pulsed ultrasound to disrupt a wood fiber mat in water and the effect of varying pulse duration, acoustic power and forming wire composition. Also, a method is shown to quantify the relative mat disruption and refluidization between experiments based on high speed imaging techniques.
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Refluidization of Wood Fiber Mats with High Intensity Ultrasound, 2004 Paper Summit, Spring Technica