PE wax has a very long non-polar carbon chain with a very strong polar center. The part of the structure that is compatible with the plastic in polarity plays the role of internal lubrication, and the part that is incompatible with the plastic in polarity plays the role of external lubrication and demoulding.

An important application of PE wax is in PVC processing. Compared with fatty acid lubricants, it does not adversely affect melt tension and Vicat softening point, and provides excellent anti-blocking and flow control effects. In special processing methods, PE wax can be used to control melting. Even if the added amount is large, it can have good compatibility with other ingredients.

PE wax is the only known plastic lubricant that can combine internal lubrication and external lubrication (release effect), while maintaining a high degree of transparency, and has little effect on gelation. In addition, the low volatility of PE wax is extremely important for calendering and vacuum degassing.

As an internal lubricant, PE wax has good compatibility with polymers. It plays a role in reducing the intermolecular cohesion of the polymer inside the polymer, thereby improving the internal friction and heat generation of the plastic melt and the fluidity of the melt.

The role of PE wax as an external lubricant is mainly to improve the friction between the polymer melt and the hot metal surface of the processing equipment. It has poor compatibility with polymers and is easy to migrate from the melt to the outside, so it can form a lubricating thin layer at the interface between the plastic melt and the metal.