PVC lubricants - PVC lubricants Introduction

Application: PVC lubricants in the dibasic lead phosphite  plastics industry mainly used as mold release agents , plasticizers , antistatic agents , especially suitable for plastic foam products, anti-shrinkage agent. In the  production of PVC products as an internal lubricant , and alkyd resin can be used as a modifier , plasticizer nitrocellulose . Lubricant in the plastics processing flowability of the blowing agent  resin to improve the releasability and products to prevent the machine or mold adhesion and internal defects . General increase in the molding cavity or onto the surface . Common lubricants are fatty acids and their salts, long chain aliphatic hydrocarbons. The mechanism of action based lubricants can be divided into external lubricant and internal lubricant.
( 1) External Lubricant: The lubricant for molding resin compatibility is poor , so commonly used in the molding machine or the mold, it forms a lubricating layer between the resin , to facilitate resin flow and mold release products such as paraffin .
( 2 ) an internal lubricant : Lubricant such good compatibility with the resin , often incorporated into the yellow iron oxide  resin , reduce the melt viscosity of the resin , to improve their mobility . Such as butyl stearate , lead stearate . Stearic acid salts as well a lubricant is effective stabilizers.