Measurement of Microstickies, 2008 Engineering, Pulping and Environmental Conference

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Stickies continue to pose considerable problems to the paper industry. Adequate management and control of stickies is necessary for the economic health of the industry. In order to properly manage and control stickies a reliable, reproducible and quick method is needed to measure the concentration of stickies.

Recent technological advances allow modern mills to efficiently remove macrostickies. Most current stickies problems are caused by microstickies that pass though slotted screens. Microstickies tend to accumulate and agglomerate in the paper machine water loop followed by deposition on paper machine wires, felts and dryer cans.

Our objective here is to demonstrate the applicability of a new macro/ microstickies measurement method. A special feature of the method is that the concentration of macrostickies and microstickies can be measured from a single pulp slurry or white water sample. The method worked successfully in the laboratory. Here we plan to demonstrate the applicability of the method with mill samples.

The test method can be quite useful in evaluating the impact of various unit operations such as pulping, screening, cleaning, washing, flotation and dissolved air flotation on microstickies generation and removal. Additionally, the effect of synthetic adhesives, coating chemicals and pacifying additives on paper recycling may also be evaluated by using this method.