Plastic tower random packing is made of PE, PP, PVC, PVDF, CPVC and has the advantages of high void ratio, low pressure drop, low mass transfer unit height, high flooding point, uniform gas-liquid contact, small specific gravity, high efficiency of mass transfer. Its main types are pall ring, polyhedral hollow ball, hollow floatation ball, conjugate ring, cascade mini ring, rosette ring, saddle ring, heilex ring, etc.