Optimization of Wet-end Operation by “Realizer”

Abstract

Neutral papermaking and high recycle fiber usage in recent years make papermaking more troublesome. Conversion of acid to neutral papermaking reduced popular use of alum. Also recycle fiber usage and worldwide concern in environmental problem brought various contaminations, anionic trash and unwanted ions in papermaking process, which would harm wet-end operation. These harmful materials could deposit on papermaking equipment, and lower machine speed, fiber retention and paper quality. As a result production rate and runnability of paper machine is affected.
“Realizer” developed by Somar will give a solution to the problems associated with wet-end operation. The new chemical assists retention of other wet-end chemicals, thus reducing total chemical usage. It also improves drainage and fiber retention. Optimization of wet-end operation using “Realizer” can be achieved by proper selection of cationic charge, molecular weight and molecular weight distribution. It depends on stock characteristics and other chemical usage. Maximization of the effect with “Realizer” is demonstrated.