The plastic filler has the characteristics of light weight, heat resistance and chemical corrosion resistance, including tower packing made of PP, PE, RPP, PVC, CPVC, PVDF, etc. The plastic packing has large void ratio, pressure drop and low mass transfer unit height. High pan-point, full vapor-liquid contact, and high mass transfer efficiency. The use temperature in various media is 60-280 ° C, plastic filler is widely used in petroleum, chemical, chlor-alkali, gas, environmentally friendly waiting column. Plastic filler is divided into plastic random packing (multi-faceted hollow ball, garland, Haier ring, step ring, Pall ring, saddle ring, different saddle ring, conjugate ring, flat ring, Raschig ring, snow ring, hexagonal shape) Ring, rotating ring, pentagonal ring, tapered ring, mesh ring, cross spherical ring, floating ball, liquid cover ball, diamond covered ball, etc.) and plastic structured packing.
The plastic filler has good corrosion resistance and is resistant to corrosion by general inorganic acids, alkalis and organic solvents. It has good temperature resistance and can be used at temperatures below 100 °C for a long time. The plastic filler is light in weight, low in cost, good in toughness, impact resistant and non-fragile, and can be made into a thin wall structure. Its large flux and reduced pressure are used in absorption, desorption, extraction, dust removal and other devices. A disadvantage of plastic fillers is their poor surface wetting properties, but their surface wetting properties can be improved by proper surface treatment.