F Fischer-Tropsch wax is a methylene polymer, an alkane polymer synthesized from hydrocarbon-based synthesis gas or natural gas. In the production process of masterbatch and modified plastics, Fischer-Tropsch wax contributes to the dispersion of fillers and excellent smoothness during mixing. It can be used as an external lubricant for PVC. The low viscosity can increase the production speed of the product. It can help the dispersion of pigments and fillers when mixing. Especially it has a good application in the extrusion of high-viscosity systems, and can significantly improve the surface gloss of products.