High-speed rail brings prospects for polyurethane

According to statistics, the high-speed ballastless track that the Ministry of Railways has started and plans to build includes the Guangzhou-Shenzhen-Hong Kong Line, the Guangzhou-Zhuhai Line, the Chengdu-Chongqing Line, the Shitai Line, the Wuhan-Guangzhou Line, the Shanghai-Nanjing Railway, the Harbin-Dalian Line and the Lanzhou-Xinjiang Line. Accumulative about 4000km, of which the estimated amount of polyurethane resin needs 28,000 tons. Polyurea technology, polyurethane expansion joints and polyurethane elastomer pads, polyurethane engineering adhesives, etc. have been widely used in China's high-speed rail construction.

The polyurea protective material developed based on the sprayed polyurea elastomer technology is a brand-new comprehensive protective material for improving the durability of concrete. After construction, it can form an overall dense, continuous and seamless high-strength, high-elastic protection. Coating, but also has good wear resistance, impact resistance and aging resistance, no additional protective layer.

Polyurethane elastomer backing plates are used between rails and sleepers. They have good elasticity and vibration damping performance. They can buffer the strong vibration and impact generated when high-speed vehicles pass through, protect the roadbed, have excellent wear-resistance and electrical insulation properties, and are resistant to natural. Aging and temperature resistance. Each polyurethane pad is about a few hundred grams. Currently, it has been widely used in domestic high-speed railways and subways. The market demand is huge.

At the same time, the annual usage of polyurethane adhesives for the construction of high-speed railways will reach 10,000 tons. The estimated market capacity in this area in 2014 will be 12,000 tons. In the next 10 years, the amount of polyurethane rubber in the industry will reach about 100,000 tons.