Processing aids are additives used in plastics manufacturing to improve the processing characteristics of the material. They lower melt viscosity, enhancing flow and making the plastic easier to handle. This results in better mold filling, reduced production issues, and increased efficiency. Processing aids come in various types, including polymeric, organic, and inorganic, each designed to address specific processing challenges. By improving the flow properties and reducing processing problems, they help in achieving higher quality products and more efficient production processes.