Increasing the interaction of Calcium Carbonate with Cellulosic Fibers

In this study, the decreasing usage rate of virgin cellulose was investigated by using modified calcium carbonate fillers. The compatibility of filler particle to fibres was increased with modification of filler with starch/stearic acid mixture. Due to the hydroxyl and quaternary amin groups of starch, the interaction between filler particles and fibers and other chemical used in papermaking became more easy. Thus, the loses due to the filler interface between fibre-fibre contact point was prevented via additional bonding potential of starch. Filler retention, ionic properties, size, and its effect on paper tensile strength were investigated. The retention value of filler particle increased after modification and this value increased further with addition of retention chemical. Moreover, the tensile strength properties of papers were enhanced after use of modified filler to paper.