Retention Aids -TGsys Series

TGfloc Series - Retention & Drainage Aids TGsys series are a colloidal silica sol for microparticle retention program. In the usual microparticle systems, polymers such as modified starch, guar gum, or polyacrylamide are combined with an anionic particle such as colloidal silica, alumina, and/or bentonite. In the standard application, the cationic polymer is introduced first and flocculates the fibers and fillers by bridging. After a shear stage where the flocs are redispersed, the anionic nano- or microparticle is added to reflocculate the furnish components to give very small, dense, and shear-resistant flocs. The flocs reformed after shear-induced dispersion are smaller and more compact than that produced from single polymer retention system. (Fig. 1) Figure 1. Schematic showing the initial adsorption and bridging flocculation of a cationic polymer (high molecular weight starch or synthetic polymer) and, after the shearing stage, the reflocculation by an anionic microparticle. Advantages obtained from the colloidal silica systems include improved retention, drainage and strength properties with good formation. In the microparticle retention system, the very large number of silica particles allows a large number of contacts with the starch molecules. The flocculation was complete within a few second. 1. Typical Properties   TFsys-150 Active content(%) 14.5~15.5 Bulk viscosity(cps, 25°C) Max.50 Specific gravity(Ave.) 1.07~1.10 pH 10.0~11.0 Surface Area(m2/g) 700~900 Storage Temp.(°C) 5~35 Shelf life(months) 6 2. Packaging Plastic pails Metalic drums Schutz container Other sizes 20kg 200kg 1,000kg - 3. Heath and Safety Toxicity, caused by TGsys series products alone and when incorporated into papers and paperboards, has not been reported so far. However, since TGsys series are acidic, contact with the solution should be avoided. When exposed to the emulsions and its solutions, wash with fresh water immediately. These data are given for information only. They do not constitute a specification and no liability is assumed, nor freedom from any existing patents.We do not guarantee the applicability or the accuracy of this information and the suitability of our products in any given situation, since we cannot anticipate the many different conditions under which our products may be used.