PVC lubricants

PVC lubricants can be divided into two kinds, the main role of the external lubricant is its poor compatibility with the polymer, easy migration from the melt inside, it can be in the plastic melt and metal interface to form a lubricating thin layer. Internal lubricants and polymers have good compatibility, which plays a role in reducing the cohesion of polymer molecules inside the polymer, thereby improving the internal friction heat of the plastic melt and melt fluidity. Of course, most lubricants have the dual effect of internal and external lubricants, rather than a mere role. Such as stearic acid, the initial processing temperature is low or the amount of more external lubrication characteristics dominate the temperature increase and pvc compatibility increased the amount of the appropriate internal lubrication.

PVC lubricants are also divided into low-temperature lubrication, temperature lubrication and high temperature lubrication. Low-temperature lubrication in the initial role of processing, such as paraffin, stearic acid, monoglyceride, butyl stearate, stearyl alcohol and so on. Medium temperature lubrication in the mid-processing lubrication, such as PE wax, OPE wax, lead stearate, cadmium stearate and so on. High-temperature lubrication in the latter part of the role of lubrication such as calcium stearate, barium stearate and so on.