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This product has a good plasticization promotion effect and can effectively improve the processing performance of PVC. This product can give PVC products good physical and mechanical properties and good surface brightness and smoothness while broadening the range of processing technology. This product is especially suitable for the production and processing of PVC wood-plastic foamed building materials, PVC rigid profiles, such as wood-plastic Great Wall panels, sound-absorbing panels, door panels, door covers, partitions, wave roof panels, etc., as well as PVC foam transoms, shutters and other products.