Calcium Carbonate significantly enhances the performance of PVC by increasing stiffness, improving dimensional stability, and boosting impact resistance—especially when finer particle sizes are used. It also supports efficient compounding by promoting better dispersion of ingredients within the PVC blend and creating a more uniform polymer flow during processing. The impact strength of rigid PVC pipes and injection-molded fittings is closely linked to the particle size of the Calcium Carbonate used. Achieving the required performance at the lowest possible formulation cost is essential. By selecting the right grade of Calcium Carbonate, manufacturers can reduce the use of costly impact modifiers and, in some cases, eliminate them entirely.
