Nylon resin is treated with special chemical methods to weaken the shortcomings such as hydrolysis and oxidation, and strengthen the heat resistance. From these requirements, we have to choose the appropriate plastics from various plastics, and the properties of our PA66 engineering plastics just meet these requirements. When our customers ask to choose a suitable material for their products, we also have to first see what requirements the products have. The mold temperature also has a great impact on the crystallization performance of PP. the mold temperature is high, the crystallinity is high, the rigidity is large, but the shrinkage rate is large. On the contrary, the mold temperature is low, the product crystallinity is low, the toughness is good, and the shrinkage rate is reduced. Therefore, the temperature is generally controlled at 40 ~ 80 ℃ and cooled with water.
It is necessary to desliminate and remove random substances in vertical stirred tank reactor. Due to different solvents, operation conditions and process steps are different. Although the slurry process was very popular at that time, the proportion of traditional slurry process in production has declined obviously in recent years. From the plastics that meet the requirements, we can choose the most suitable plastic raw materials from the aspects of property ratio, cost and quality. For the material selection of valve cover, we often identify PA66, which is not of poor quality, PMMA is a general-purpose plastic with low price and wide application. The most common one should be transparent PMMA, and Transparent PMMA products often encounter different problems in the processing process.
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