Paraffin wax possesses a long non-polar carbon chain with a strong polar center. Within its structure, the part compatible with plastics in terms of polarity serves as an internal lubricant, while the part incompatible with plastics in terms of polarity acts as an external lubricant and aids in demolding.

1. PE wax is crucial in PVC processing applications. Unlike fatty acid-based lubricants, it doesn't adversely affect melt tension and Vicat softening point, offering excellent anti-adhesion and flow control properties. It can be used to control melting in special processing methods, even with high addition rates, maintaining excellent compatibility with other components.

2. PE wax is a superior lubricant known for its ability to provide both internal and external lubrication (de-molding effect), while maintaining high transparency and having minimal impact on gelling. Additionally, the low volatility characteristic of PE wax is crucial for calendering and vacuum degassing.

3. PE wax, as an internal lubricant, has good compatibility with polymers. It plays a role in reducing the intermolecular cohesive force within polymers, thereby improving the internal friction and heat generation of plastic melts, as well as the fluidity of the melt.

4. The primary role of paraffin wax as an external lubricant is to improve the friction between polymer melt and the hot metal surface of processing equipment. Due to its poor compatibility with polymers, it tends to migrate from the melt, thereby forming a lubricating thin layer at the interface between plastic melt and metal.