FT wax is a by-product of coal chemical industry, paraffin wax is separated from petroleum distillation, PE wax is low molecular weight polyethylene, Fischer-Tropsch wax consists of straight chain, saturated high carbon alkanes with a relative molecular mass of 500-1000. So this chemical has a fine crystal structure, high melting point, narrow melting point range, low oil content, low needle penetration, low mobility, low melt viscosity, hardness, wear resistance and high stability. Differences between PE wax and FT wax: (1) Molecular weight. The molecular weight of Fischer-Tropsch wax is much lower than that of PE wax, and the branched chain is also less, with high crystallinity, which is easy to penetrate into the high-viscosity macromolecular chain and significantly reduce the melt viscosity, with little migration during processing and obvious lubrication effect in the later stage. (2) Fischer-Tropsch wax is saturated with straight alkanes, which does not contain double bonds, and has strong anti-oxidation ability and good weather resistance. (3) The viscosity of Fischer-Tropsch wax is much lower than that of PE wax, only about 10. The same lubricating effect can be achieved with less dosage. The use amount is only 70-80% of PE wax. Fischer-Tropsch wax is more compatible with PVC and can be competent as both internal and external lubricant. It can be used as a good internal lubricant to effectively control shear conditions, promote flow, control friction and melt properties, thus improving thermal stability. At the same time, Fischer-Tropsch waxes give the best physical and processing properties to PVC products due to their high crystallinity and high linearity structure. Depending on the need, Fischer-Tropsch process can synthesize alkanes of different chain lengths to change the molecular weight of the final product and form a series of products.