HYMO TWINS SYSTEM

Abstract

Recently, in Japanese paper mills, the papermaking conditions have been getting worse because of higher usage of recycled paper, proceeding mill closure, alkaline paper making or an increase of wire speed. Under such conditions, retention aids have been required to achieve much higher performance. One of such retention aid systems is the micro-particle system using cationic PAM and inorganic substance. We have developed various types of dispersion polymers, which have characteristics of high molecular weight, high actives and low product viscosity. Furthermore we have developed a new retention system, HYMO TWINS SYSTEM, characterized by using both cationic dispersion polymer and anionic dispersion polymer. HYMO TWINS SYSTEM achieves higher retention and higher drainage than micro-particle systems.