> Plastic additives Lubricants
Plastic additives Lubricants
2013-07-27 by seoer8
Lubricant in the plastic additive processing flowability of the 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 PVC lubricant 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 resin, reduce the melt viscosity of the resin, to improve
their mobility. Stearic acid salts as well a lubricant is effective stabilizers.
Lubricant is to reduce friction between the polymer and the device, and between the polymer chains of internal friction. The former is called external lubrication,
which is called internal lubrication.