Application of PA66 in the elastic type III fastener system
The spring type III fastener system has no bolts or no shoulders. The elastic strip type I and II fasteners are made of unreinforced PA66 material. Although they have good impact, they have limited load. The insulating gauge block of the elastic type III fastener system uses glass fiber reinforcement. PA66, with high strength, its ability to maintain gauge distance is much larger than the elastic strip type I and II fasteners, with PA66 as the base resin, reinforced with alkali-free long glass fiber, and increased with compound toughening agent. Tough, the insulating gauge block made of glass fiber reinforced PA66 composite material greatly improves the impact resistance and ensures the safety of railway transportation.
![PIJ%4UJN6W$Q7F]_[N26BQX.png](/Content/upload/2018279890/201807072110514521782.png "PIJ%4UJN6W$Q7F]_[N26BQX.png")
Nylon gauge block structure diagram
With the speed of railway transportation, polymer materials and components play an increasingly important role in the new railway track. The rapid development of the plastics industry has further improved the variety and quantity of engineering plastics, especially the strengthening and toughening composite materials. The railway track materials require a large amount of plastic materials, and the material modification and processing technology level will be improved, and the application range of PA66 will be further expanded. In particular, extreme weather in some areas affects the performance and longevity of rail fastener plastic parts. Further improving the performance of materials and ensuring the safety of railway transportation has always been the direction of professional scientific and technical personnel.
