Cross ball packing PP cross global packing products mechanical strength and chemical stability, flame retardant and self-extinguishing good. In addition to strong oxidizing acids (such as fuming H2SO4) and aromatic and F containing hydrocarbons and inorganic solvents, it has high chemical stability for other general acid and alkali media, especially for Cl2 gas, sodium subCl2 acid, NaOH and other Cl2 alkali compounds with excellent corrosion resistance, insoluble in water, alcohol, gasoline. High chemical resistance (strong inflammatory acid, 90% 2SO4, 60% HNO3 and 20% NaOH). But its heat resistance is low, the softening point is 80℃ and the temperature is 60℃. , suitable for use under 60℃ Cl2 gas (dry, wet Cl2), 70% to 90% H2SO4 corrosion, NaOH and other corrosive medium conditions.