Abstract: This paper reported an investigation on systematic tests and evaluation methods for resin lubrication performance of poly(vinyl chloride) (PVC) lubricants. It was found that the resin lubrication functions, the internal lubrication, primary external lubrication and secondary external lubrication, and the efficiencies of these functions of PVC lubricants could be identified by determining their effects on the fusion time of PVC when used alone and in combination with a high-performance resin external lubricant at the common use level using a torque rheometer under the common processing condition, and comparing comprehensively the results.

Key words: poly(vinyl chloride), lubricant, resin lubrication performance, torque rheometer, test and evaluation