Adsorption Behaviour of Polymer Thickeners onto Mineral Pigments and the Effect on Viscosity of Coating Mixtures

摘要

Polymeric thickeners play a vital role in controlling water retention in paper coating processes. In this work, we have focused on the interaction between various polymer water retention agents (i.e., thickeners) and coating pigments, in an attempt to improve the understanding of the thickening mechanisms. Adsorption isotherms of the polymeric thickeners on both clay and GCC pigments and the influence of the selected thickeners on coating mixtures behavior at low shear rate were investigated.