The influence of type of calcium carbonate fillers on the performance AKD and mechanical properties of printing and writing paper

This study aimed at evaluating effect of sizing agent and various fillers on properties of printing and writing paper. Therefore, sizing agent (AKD) in 1.5% level and fillers including precipitated calcium carbonate (PCC), ground calcium carbonate (GCC) and Obtained from Water Treatment Process (SCC)in 30% level were applied based on dry weight of fibers in furnish consisted of 80% chemical-mechanical pulp (CMP) of hardwood and 20% bleach softwood kraft pulp (BSKP) according to TAPPI Standard. In order to investigate the effect of sizing agent and various fillers, papers with 60 g/m2 basis weight were produced from each treatment. Results showed that the dimensional properties of calcium carbonate species is effective on strength properties of paper. Of the three types of ground calcium carbonate (GCC), precipitated (PCC) and softening calcium carbonate (SCC), precipitated calcium carbonate due to smaller particles cause a further reduction in paper strength and Calcium carbonate from water softening due to the larger particles, had a minimal impact in reducing the paper strength properties. Paper filled with precipitated calcium carbonate has an intermediate strength properties of paper filled with precipitated calcium carbonate and softening calcium carbonate.