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Application of Glass Fiber Reinforced Nylon in High-speed Rail
Apr 25, 2018

           Application of Glass Fiber Reinforced Nylon in High-speed Rail

Glass fiber reinforced nylon has high strength, light weight, wear resistance, corrosion resistance, easy molding, glass fiber content of more than 30%, modified by toughening, weathering, insulation, etc., facing new challenges in the rapid development of high-speed rail in China and the world opportunity.

In 2017, the total length of China's high-speed railways has reached 22,000 kilometers. China's rapid economic development, high-speed railways still have outstanding contradictions in the "bottleneck" restriction, and railway transportation can not keep up with the rapid development of China's industrial economy and modern life. The entire world is in high-speed rail. In the third wave of construction, the fourth wave represented by maglev trains is brewing. High-speed rail has also become China's One Belt and One Road business card for overseas investment and opening up. The development speed of high-speed rail in China and the world is huge.

High-speed rails generally operate at a speed of 250 kilometers per hour and require high track rigidity, high stability and appropriate elasticity, performance reliability, and ease of maintenance. Higher and higher requirements are placed on the use of new materials. The application of glass fiber-reinforced nylon in future high-speed railways focuses on two aspects: First, the application of rail components; the first is the lightweight application of cars.

The application of glass fiber-reinforced nylon in high-speed railway track components includes insulation rail moment blocks, insulation bushings, gauge baffles, and ballast rail brackets.

China's high-speed rails are all speeding up. Under the action of high-speed dynamic loads, the track must not only have sufficient strength, but also maintain sufficient elasticity. The elasticity of the track is provided by the fastener system. The key parts of the insulated track gauge block are made of 30% fiber. Reinforced nylon 6 material, it ensures the comfort and safety of the car.

Now the high-speed rail has designed a new type of railway ballast, using concrete smash pillows, plastic insulation casing made of sacral pillows, it is related to the use of the ballast mission and the safe driving of the locomotive, requiring high strength, insulation, toughness and other properties, Made of glass fiber reinforced toughened nylon 6 material.

The speed of high-speed railways will be faster and faster. The speed of super-high-speed railways currently under development in our country has reached 1,000 km/h, and the faster the speed, the significance of its lightweight research will become more prominent.

Glass fiber reinforced nylon has the following major directions in the application of high-speed rail lightweight:

1, honeycomb interior parts instead of steel to reduce vehicle weight.

2. The vehicle friction plate adopts self-lubricating glass fiber reinforced nylon 6 instead of steel friction system, which not only saves material and reduces weight, but also is durable.

3. The drive system bearing cage adopts glass fiber reinforced nylon 6 material, which greatly prolongs the service life of the locomotive bearing.

4. High-speed railway hearth liner, which is a high load bearing part of the vehicle. Under high-speed longitudinal, lateral, torsional and dynamic load acceleration of the vehicle, the maximum bearing pressure of the core disc liner is 11MP, and the glass fiber reinforced nylon 6 is fully capable. It can also lose weight.

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