Solid Retention Polymer Retention agent is a water-soluble, linear organic polymer. Could enhance the drainage of the wire, improve the retention of small fibers. Advantage: Improve the quality of the paper, such as bonding strength, tensile strength. Save cost by increasing filler retention. Improve whitewater circulation system. Improve paper formation. Improve drainage efficiency. Features: The best retention of fine particles and colloids in the papermaking process normally occurs when the zeta potential is near to zero and retention aid doing that. The main functions of retention aid are following: Improve the quality of the paper, such as bonding strength, tensile strength. Reduced wet-end additives and sizing usage. Improves paper machine runnability