Thermal stabilizers main function is to prevent thermal degradation during processing, but also to prevent the product in the course of long-term aging effects. The larger is the amount of heat stabilizer polyvinyl chloride and vinyl chloride copolymers. The amount of heat stabilizer in soft products in the range of about 2%, while in hard products for 3% to 5%. The main categories of heat stabilizers include lead salts salt, fatty acid soap, organic tin, organic auxiliary stabilizer and composite stabilizer. ① salt of lead salts (ie, basic lead salts) such as tribasic lead carbonate and lead phosphate dibasic, use the earliest, masterbatch, is still widely adopted. Its heat resistance, electrical insulation, weather resistance are good, low price, but toxic, opaque, poor dispersion. ② fatty acid soap, stearic acid and lauric mainly cadmium, barium, calcium, zinc, magnesium. Usually cadmium and barium soap soap, calcium soap and zinc soap and use, light red masterbatch to produce a synergistic effect. Soap toxic cadmium, barium soap also has some toxicity, but non-toxic calcium soap and zinc soap. ③ organotin, is recently the fastest growing category. Good transparency, blue masterbatch, heat resistance and weather resistance of many species of very prominent, is a hard transparent products essential heat stabilizers. Dimercapto acid isooctyl, di-n-octyl tin is the most widely used non-toxic stabilizer. ④ phosphite and epoxy compound used as a secondary stabilizer as component composite stabilizer. Composite stabilizer with universal cadmium - barium (zinc), resistant to barium sulfide contamination - zinc, non-toxic calcium - zinc, and other types of organotin compound, mostly liquid. Plastic Pigment production process frequently encountered problems and solutions plastic pigment discoloration or fading Analysis: material is subjected to thermal degradation, the melt temperature is too high, too low heat resistance temperature of the toner. Workaround: additives or fillers / switch high temperature of the toner / lower cylinder temperature / check school head nozzle temperature / lower injection or screw forward speed / lower pre-plastic screw speed or feed feed rate / decrease (material in the barrel) the residence time / switch to different specifications of the injection machine embrittlement Analysis: Very long material due to thermal degradation / screw speed too high / material in the barrel residence time / screw back pressure too high / material without pre-drying / return ratio of the materials is too high? / Material was contaminated / used an inappropriate toner / at the corner part? Cut or the thread is not provided adequate transition radius / part after forming voids or nicks / hopper temperature inappropriate / mold temperature is too low / nylon plastic parts after forming the moisture content is too low? . Workaround: additives or fillers / reduce the weight of regrind / pumping tablets / check school cylinder temperature / check school head nozzle temperature / lower injection pressure / low-pressure adjustment / down? Preplasticization time? Screw back pressure / lower screw speed or feed rate when pre-plastic / tone low pressure time / reduced? Material in the barrel? Residence time. Production process frequently encountered problems and solutions masterbatch, masterbatch, may Lyle plastic (view) may be provided by the Texas Plastic Co., Lyle. Texas may Lyle Plastic Co., Ltd. (www.sdkelaier.com) is specialized in "masterbatch, masterbatch, masterbatch, color masterbatch, organic pigments, additives, lake," the business, companies adhering to the "integrity management , the intentions of service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Zhou Xingrong.