The modification of PVC plastic pellets is mainly by adding various modification additives, including: plasticizers, heat stabilizers, lubricants, processing modifiers, impact modifiers, fillers, anti-aging agents, colorants, etc. . The non-smooth surface of PVC plastic pellets is related to the addition of various modifiers and the processing process. Through the analysis of various problems, there are roughly the following reasons that the surface of the product is not smooth: processing problems, impurities are mixed in the processing of PVC plastic pellets, or the melt is not completely plasticized in the barrel, resulting in uneven surface of the product. Smooth; PVC plastic pellets are not dried before processing, so that the material contains moisture, so there are water patterns on the surface after processing into products, which requires drying before processing; mold problems, check whether the surface of the mold is smooth, especially PVC It is corrosive to a certain extent and requires regular maintenance of the mold; if the product formula problem is determined to be a product formula problem after excluding other problems, it cannot be solved by the processing plant. It is necessary to contact the upstream raw material manufacturer to modify or replace the formula.
