Application as Papermaking Organic Particulate Retention Agent of Cationic Polymethyl Acrylate Emulsion in Bleached Wheat Straw Pulp

Abstract

Cationic polymethyl acrylate emulsion which was prepared with no soap emulsion polymerization was used in bleached wheat straw pulp as papermaking retention agent. The main influence factors on retention effect, such as dosage of polymethyl acrylate emulsion, pH value of the bleached wheat straw pulp, reaction time after adding the polymethyl acrylate emulsion and stir velocity were discussed in detail. Experimental results showed that optimal application conditions were that first step was adding cationic emulsion which dosage was 0.64% relative to dry fiber, stir velocity was 1400r/min, 90s for reaction, second step was adding anion components which dosage was 0.16% relative to dry fiber, stir velocity was 750r/min, 60s for reaction, pH value was 4.5~5.0. The cationic organic particles system has good retention aid effect which one pass retention was 96.4%.