Determination of Macro and Microstickies in the Same Stock and Water Samples

摘要

By determining the microstickies content of the first 5 gallons of screenate from the standard TAPPI macrostickies test, it is possible to pinpoint causes for stickies problems due to agglomerated microstickies. The test can be used to determine the formation tendency for microstickies in recycled paper samples (e.g., labels, waxed OCC) during different repulping conditions. It can also be used to determine the efficiency of the different unit operations in a recycling process to remove or create microstickies (e.g., screens, cleaners, flotation and/or dissolved air flotation cells). Since the macrostickies and the agglomerated microstickies are retained on the same screen with 0.006 inch slots using the same original sample, it is possible to compare the values obtained for each sample. Preliminary results from an accelerated agglomeration test for microstickies will also be presented.