SURVEY OF POTENTIAL RETENTION AIDS FOR NEWSPRINT MANUFACTURE.

Among 17 polymer evaluated as retention aids for fines in newsprint manufacture, a high-molecular weight poly(oxyethylene) (PEO), was the most cost effective. Eighty percent first-pass retention was observed at 0. 04% PEO, whereas 0. 14% of a solid, high molecular weight, cationic poly(acrylamide), the next most cost effective retention aid, was required for the same performance. The effectiveness of the polymers was decreased with increasing …