INGEDE METHOD FOR THE ANALYSIS OF MACRO S TICKIES IN DIP

For the quantitative evaluation of macro stickies in DIP a method base d on lab screening was developed which aimed at minimizing subjective effects caused by manual handling. The analytical project described wa s supported by INGEDE. Systematic studies on pulp suspensions laden wi th model stickies as well as on commercial DIP were performed in order to optimize the steps of screening, sample preparation and measuremen t by image analysis. The developed procedure guarantees reproducable r esults with reasonable analytical effort. The identified macro sticky areas related to a reference unit of 1 kilogram pulp vary over a wide spectrum depending on the type of waste paper, its processing and the stages at which samples are taken which indicates the sensitivity of t he method proposed to variations of the sticky content.