Because the dehydration process of the paper material will directly affect the quality of the paper and the working function of the paper machine, and the improvement of the water filtering function can improve the productivity, improve the sheet formation, reduce the energy consumption of the drying section, etc., the water filtering function of the advanced paper material is One of the important contents of wet end chemistry research.

Practice has proved that polyaluminum chloride, which has a higher positive charge itself, is an excellent impurity scavenger, which can bind to these anionic impurities and accumulate them on the fiber, and then not only control the disturbing effect of anionic impurities in the pulp, and also improves the drainage performance of the pulp, because even a small amount of anionic fiber degradation products will greatly affect the drainage effect of the paper stock. At the same time , polyaluminum chloride can be easily adsorbed to the fiber surface, and can also adsorb negatively charged fillers and fine fibers, making them more hidden inside the paper sheet; synergistic effect with other organic polymers It can effectively improve the storage rate of fine materials and improve the drainage performance of the slurry.