Lubricant lubrication mechanism

General molecular structure of the lubricant, there will be long chain non-polar group and a polar group in two parts, they are in different compatibility of the polymer is not the same, thus showing different internal and external lubricating effect .
External lubricant's role is mainly to improve the polymer melt processing equipment with hot metal surfaces rubbing. Poor compatibility with the polymer which is easy to migrate out from the melt, so that the plastic melt in the interface with the metal to form a thin layer of lubricant.
Lubricants and polymers have good compatibility, which serve to reduce the polymer inside the role of cohesion between the polymer molecules, thereby improving the internal friction of the plastic melt heat and melt fluidity.
External plastic lubricant can be increased in the processing of the plastic surface lubricity, reduce plastic branches and adhesion of the metal surface to be subjected to mechanical shearing force to a minimum, so as to not damage the plastic properties in the case of the easy molding purposes. PVC lubricant can be

Reduce internal friction polymer to increase the melting rate and melt the plastic deformation, reduce melt viscosity and change plasticizing properties. Each lubricant can actually achieve a demand has the role of the joint action of external lubrication is always only one aspect in more projecting

Some. A lubricant in the same or different polymers under different conditions will exhibit a different lubrication, such as high temperature, high pressure, the internal lubricant is squeezed out and become external lubricant. Generally accepted that good compatibility with the polymer, polar polar groups

The lubricant more for large internal lubricant; the contrary, as external lubricant, but there are also internal lubricant and external lubricant properties are excellent varieties.