Over the past twenty years microparticle technologies have been developed to improve retention, drainage, and formation Compared to conventional single and dual polymer retention systems, microparticle systems sometimes demonstrate significant advantages, including increased retention and drainage simultaneously with no sacrifice in paper formation, and better performance in the presence of high concentrations of interfering substances, due to the formation of small, tight flocs, which adsorb strongly to the furnish components and leave the sheet structure open and uniform. The microparticle retention system allows for the clean-up of the white water loop by effectively
retaining the suspended and dissolved solids including fillers with wood fibers