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PVC resin to adding various additives to improve the performance of PVC in the processing, in order to meet the needs of processing and properties of the products. The production of plastic profile in general to join: heat stabilizer, processing modifier, impact modifier, lubricant, light stabilizer, filler and pigment. Although the additives amount is 0.1% PVC resin to 10%, but their role is very important, can say the amount of change are indispensable, and the influence on the performance of processing and final products. Therefore, accurate weighing and batching should not only in the mixing process to achieve uniform mixing, consistency of the material.