OPE wax for pvc products

Oxidized polyethylene wax serves as a highly important and efficient external
lubricant and processing aid in PVC manufacturing. It plays an irreplaceable
role by enhancing processing fluidity and improving the surface quality of
finished products.
1. Superior External Lubrication Effect
Mechanism: The molecular chains of oxidized polyethylene wax carry polar
groups such as carboxyl and hydroxyl groups. These groups enable one end to
weakly anchor onto PVC molecular chains, while the long-chain alkane groups
at the other end extend outward.
Effect: This creates an effective lubricating film between the PVC melt and
the metal surfaces of processing equipment (e.g., barrels, screws, molds).
This film significantly reduces friction between the melt and metal surfaces,
preventing melt adhesion to equipment. Consequently, material is easier to
convey, plasticize, and demold.
2. Promoting Plasticization and Improving Flowability
Although primarily functioning as an external lubricant, its moderate
polarity provides slight compatibility with PVC, preventing complete
“slippage” unlike paraffin wax. It reduces friction-induced heat while
ensuring effective shear force transfer, aiding uniform plasticization of PVC
resin. This lowers melt viscosity and enhances flowability.