In the highly competitive PVC extrusion market, maximizing throughput while minimizing equipment wear is critical. This whitepaper details how the application of a 1.0% stearic acid surface coating on micronized calcium carbonate drastically improves processing efficiency.

Torque Reduction and Flowability

Our empirical research demonstrates that utilizing coated GCC reduces extruder torque by approximately 14% compared to uncoated equivalents. The hydrophobic nature of the stearic acid coating prevents agglomeration, allowing for a far more homogenous dispersion within the PVC matrix.

Furthermore, the coating acts as an internal lubricant during the extrusion process, which directly correlates to a significant reduction in screw and barrel wear over prolonged manufacturing cycles.