Relationship Between PVC Pipe Brightness And PE Wax

Relationship between PVC pipe brightness and PE wax. PE wax is a lubricant for PVC pipes, the most common external lubricant. During processing, under high temperature and high pressure, PE wax can easily precipitate from the molten material and migrate to the surface, thereby ensuring the brightness of the PVC pipe surface!

The effect of PE wax dosage on the surface brightness of PVC pipes:

1. When the dosage of PE wax is 0.1 parts, the performance of PVC pipes is qualified, but the surface brightness is poor.

2. When the dosage of PE wax is increased to 0.2 parts, the material is well extruded and plasticized, the performance of PVC pipes is qualified, and the surface is brighter.

3. When the dosage of PE wax continues to increase to 0.4 parts, the material is poorly plasticized, the melt strength is poor, the traction is difficult, and the pipe performance is unqualified. This is because the amount of lubricant is too much, and a layer of isolation film is formed between the material and the barrel. The molten material and the equipment will slip, and the material cannot get the shear force required for plasticization. Insufficient plasticization leads to unqualified performance of PVC pipes and decreased surface brightness.

PE wax is an important lubricant in the PVC processing process. Compared with fatty acid lubricants, it does not have an adverse effect on melt tension and Vicat softening point, and provides excellent anti-adhesion and flow control effects. PE wax can be used to control melting in special processing methods; even if a large amount is added, it can have good compatibility with other ingredients.

TIANSHI PVC pipe lubricant acts as an external lubricant, 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.