Two China Screwless Terminal Blocks Factory to the molecular structure characteristics of PPS, it has the following characteristics: (1) Heat resistance has excellent heat resistance. The continuous use temperature is 200 ℃ ~ 240 ℃ by the United States UL certification, and the high load heat distortion temperature is above 260 ℃. At the same time, the solder has excellent heat resistance. (2) Flame retardant combustion safety is determined by comprehensive evaluation of critical oxygen index, combustion gas inspection, and gas toxicity. PPS is V-0/5V in the UL94 flammability test without adding flame retardants,

which is the highest level. In addition, NASA (National Aeronautics and Space Administration) investigations and studies have proved that PPS has the highest combustion safety. (3) Chemical resistance It has excellent chemical resistance comparable to PTFE (polytetrafluoroethylene). So far, no solvent that can dissolve PPS at 200°C has been found. (4) Mechanical properties: high strength and high rigidity. At high temperatures, the mechanical properties decrease less, and it has excellent creep resistance and fatigue resistance. (5) Dimensional stability

The molding shrinkage rate is extremely small, and the water absorption is low. The linear expansion coefficient is small. Therefore, it also exhibits excellent dimensional stability under high temperature or high humidity conditions. (6) Electrical performance Under the conditions of high temperature, high humidity and high frequency, it shows excellent electrical performance. (7) Friction and wear characteristics By filling carbon fiber, fluororesin and other lubricants, friction and wear characteristics can be greatly improved. (8) Moldability due to good fluidity, thin-walled, long-flow injection molding can be performed. 3.

Molding process 3.1 Overview of molding process PPS used for engineering plastics is generally added with glass fiber or inorganic fillers. Therefore, screw injection molding machines are mostly used for processing. But choose the screw and barrel specially designed for glass fiber reinforced engineering plastics. Open nozzles can be used as nozzles, but closed nozzles are recommended to prevent nozzle casting. The heating ring of the nozzle must be individually controlled.

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