Lubricants are essential additives in PVC processing. lubricants influence the manner in which PVC melts and floes during processing. several parameters like melt pressure in machine , energy consumption of the processing equipment , gelatin of the PVC. Lubricants are generally divided into internal and external groups. This differentiation is relatively fluid as in the majority of cases. Both internal and external characteristics are combines although one effect predominates.
Sue to their chemical structure . Internal lubricant are largely compatible with the polymers and have effects like reduction in frication heat , postpone gelatin, lower melt viscosity , improve floe characteristics.
External lubricants are largely active between the polymer melt and the surface of the processing equipment with the focus on improved gloss , delayed gelatin, provide release properties , reduced friction.
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