The role of polyethylene wax in pvc

When PVC pipe is produced, it will not appear smooth with bad brightness. Paraffin wax as pvc lubricant, due to the low softening point and bad dispersion, the temperature is too high in the production process, the wax basically liquefies and becomes gaseous and evaporates away, and it is difficult for the wax to work in PVC pipe application.

Polyethylene wax (PE wax) can solve this problem. Polyethylene wax has high softening point, in high temperature conditions, polyethylene wax (PE wax) will just become liquid.

Polyethylene wax has a very strong polar center and a very long non-polar carbon chain. The part of the structure of polyethylene wax that is polarly compatible with plastic plays the role of internal lubrication, while the part that is polarly incompatible with plastic plays the role of external lubrication and mold release.Important applications of polyethylene waxes are in PVC processing. Compared to fatty acid-based lubricants, PE waxes do not adversely affect melt tension and Vicat softening point and provide excellent anti-sticking and flow control. PE wax can be used to control the melt in special processing methods. It has good compatibility with other components even when added in large quantities.

PE waxes are the only known plastic lubricants that can combine both internal and external lubrication (release effect) while maintaining a high degree of transparency with little or no effect on gelling. At the same time, the low volatility properties of PE waxes are extremely important for calendering and vacuum degassing.

PE wax has good compatibility with polymers as an internal lubricant, and it plays a role in reducing the cohesion between polymer molecules inside the polymer, thus improving the internal frictional heat generation and melt flow of the plastic melt.