A PRACTICAL VIEW OF A MICROPARTICLE SYSTEM IN SUPERCALENDERED PAPER

This paper will outline the advantages of running a polymer/bentonite microparticle system on a 400 tons/day twin-wire paper machine making supercalendered printing paper Prior to running the multi-component mi croparticle system, a single nonionic polymer system had been run with varying degrees of success. The current microparticle system uses thr ee components comprised of a poly-DADMAC coagulant, a cationic polyacr ylamide, and a modified bentonite clay. As a result, considerable impr ovements performance, efficiency, and controllability have been obtain ed This paper outlines the advantages of the system regarding first-pa ss retention, drainage, paper machine runnability and paper quality.