New Advances in Microparticle Retention Technologies

摘要

Current microparticle systems are presently approaching the limit of their efficiencies. Buckman Laboratories new, unique Mosaic~(TM) system combines the strengths of our existing Bufloc technologies with a performance-enhancing engineered colloidal component, resulting in superior performance. This paper will present three newly engineered colloidal technologies. Two of these chemistries are cationic charged. Laboratory evaluations and mill trial data for fine paper, board and newsprint will be discussed. Emphasis will be on application strategy, equipment requirements, and benefits obtained using these newly engineered colloidal materials. These newly engineered colloidal materials have proven to improve drainage, retention, and formation in various papermaking furnishes, and all of them have been shown to work in a very wide papermaking pH range. These chemistries, in combination with polyacrylamide and coagulant technologies, have shown superior performance over existing conventional microparticle systems. Laboratory findings on the performance of these materials have been supported by paper machine data. This paper will present both laboratory and machine data to show the Mosaic System programs effectiveness compared to traditional silica and bentonite-based microparticle systems. The laboratory data that will be presented include Britt Jar, drainage, and formation studies, and the effect of these engineered colloidal materials on paper properties. The data will then be correlated to the data obtained from the machine trials.