The main feature of rosette packing is that the packing has a large porosity and is not easy to be blocked. It also has the advantages of large flux and low resistance. The rosette packing is also called plum rosette packing. It is made up of many rings. Due to the energy in the gap of the packing It has a higher liquid holding capacity, because the gap of this packing can have a higher liquid stagnation, which can make the liquid in the tower stay longer, thereby increasing the gas-liquid contact time and improving the mass transfer efficiency of the packing . Polypropylene packing has the characteristics of large porosity, low pressure drop and mass transfer unit height, high flooding point, sufficient vapor-liquid contact, small specific gravity, and high mass transfer efficiency. It is mostly used in gas scrubbing and purification towers.