| 摘要 |
<p>A titration technique for measuring the surface in a papermaking colloidal suspensions, particularly on the furnish in a papermaking process. The surface charge measurements are used to determine the optimum conditions for maximizing the drainage rate and first pass retention on a papermaking machine. The amounts of a cationic and anionic polymer that adsorb onto the surface of the headbox furnish components are measured by a colloid titration technique and the surface charge is calculated. A furnish having a met positive surface charge on its suspended particles adsorbs more anionic polymer than cationic polymer. The opposite is true in a negatively charged system. The ratio of the amounts of each polymer adsorbed onto the surface of the suspended particles in the furnish is determined by the sign and magnitude of the surface charge of the system. The ideal surface charge is determined experimentally for each paper or board machine and then can be maintained on the papermaking machine by adjusting pH, alum level, broke addition and wet additives.</p> |
