Influence of Amphoterous Polymer Resin on Indexes of Dehydration of Pulp and Paper Quality
Influence of amphoterous polymer resin “Ultrares 200” on forming process and strength properties of paper from wastepaper was investigated. It was established, that increasing of beating rate of pulp leads to decreasing of pulp dehydration rate. It was concluded, that grinding shortens and partially fibrillates fiber, increasing their surface leading to better swelling and retention of water by fibers. It was shown, that increasing pulp temperature and charges of amphoterous polymer resin “Ultrares 200” accelerates pulp dehydration rate by the means of interaction of resin’s cationic groups with hydroxyl and carboxyl cellulose groups creating fiber aggregates. It accelerates process of pulp dehydration, promotes pulp components retention at wire of paper machine and increasing its productivity. It was found that addition of “Ultrares 200” in quantity 0,2-0,6 % from absolutely dry fiber mass can increase for 0,5-23 % strength properties of paper from wastepaper.