Abstract
This paper presents a review of technological transition and recent developments of papermaking chemicals, such as sizing agent and dry-strength resin. In recent years, papermaking conditions have changed by greater use of recycled pulp, high amount of coated broke in furnish, higher loading of filler, increases in speed of paper machine and closed water system in paper mill. These trends result in the rising of pH values and electric conductivity of furnish and the increasing of dissolved and colloidal substances in papermaking systems, that disturb the absorption of papermaking additives to fiber and fine. Under these circumstances, the performance of sizing agent and dry-strength resin has been declined. To improve of paper properties and papermaking efficiency, it is necessary to understand of wet end conditions and utilize new polymer technology in papermaking chemicals.
