PVC fillers are known for their excellent chemical inertness, corrosion resistance, and wear resistance. It can maintain stable performance in various harsh environments and withstand long-term corrosion from chemical substances and impact from high-temperature fluids. In addition, PVC fillers also have excellent breathability and ventilation performance, thanks to their corrugated or hexagonal structure, which can significantly increase the breathable area of the filler bed and improve the efficiency of heat and mass exchange.