Since its development in the 1960s, epoxy vinyl ester resin has been popularized and applied in many industrial fields, and has gradually been accepted and recognized by users. In the 1990s, it became an internationally recognized representative of new corrosion resistant materials, and its application range was gradually replaced. Early traditional corrosion resistant resin. With the increase of scientific research, many vinyl ester resins with unique properties and uses have been promoted or further modified. At present, epoxy vinyl ester resins are developing characteristics, and these characteristics are excellent in performance, and applications, particularly in vehicle applications, are becoming more widespread. The first is high-efficiency flame retardant, low-smoke density, low-toxicity epoxy vinyl ester resin. China's rail transit mainly includes trains (trains), trams, subways and light rails. At present, the most important long-distance transportation is trains. The city's urban traffic is in terms of subways and light rails. Thermosetting composites have contributed to the development of rail industry such as railways due to their inherent characteristics. However, thermoset composites are based on organic molecular structures, which are potential combustibles under fire conditions. The main disadvantages of conventional unsaturated polyester resin applications in the railway industry are flammability, vehicle stopping and passenger evacuation time. Therefore, countries around the world have developed different flame retardant (including smoke and poison) standards, protective measures and provisions to protect passenger safety.
Thermoset composites are widely used in rail transportation. For example, in the track facilities, cable trays, walkway grilles, grille guardrails, electrical boxes, noise and anti-glare panels, lampshades, lamp posts, Site kiosks, composite sleepers, etc.; in the car interior parts, can be used for car doors, windows, seats, wall panels, roof panels, floors, toilets, toilets, toilets, tea tables, luggage racks, air conditioners Wind tunnels and other components. Ashland has solved the problem of adding flame retardant resin. Due to the poor construction performance caused by adding a large amount of flame retardant, its flame retardant resin HETRON and MODAR series can be used in the same way as other thermosetting unsaturated resins. Paste, spray, SMC and BMC.RTM, vacuum molding and injection molding, squeezing, etc. Different types of flame retardant resins can be selected for different processes depending on the number of parts and economy. The above two series of flame retardant resins have been successfully applied in many rail transit projects such as cable trays in the English Channel ramp, French TGV, new trains in China, and subway facilities. Domestic resin manufacturers have also carried out research on this side and achieved certain results. Shanghai Fuchen Chemical Co., Ltd. introduced FUCHEM 928 modified acrylic flame retardant resin, and FUCHEM 892FR epoxy vinyl ester flame retardant resin.
These products of Fuchen Chemical have reached the foreign level in high-efficiency flame retardant, low smoke density, low toxicity, etc., and exceed the imported resin in some performances, such as its good processability and high physical and mechanical properties of the FRP products produced. It can replace its imported flame retardant resin and has been tested and certified by relevant US agencies. The second major aspect of the "characteristic" product is the flexible epoxy vinyl ester resin. Compared with the traditional epoxy vinyl vinegar resin, the flexible vinyl ester resin has higher elongation, greatly improved bonding strength, nearly 4 times higher impact strength, 20% increase in interlayer strength, and unique wear resistance. Sex. Combine with Kevlar fiber or other reinforcing materials to create high strength and fatigue resistant products such as sports or military helmets, sailboats and more. FUCHEM 810 resin is a rubber modified flexible epoxy vinyl ester resin. The resin is used on high speed train locomotives. The front part of the Italian ETR500 high-speed train adopts aramid fiber reinforced flexible epoxy vinyl ester resin FRP composite material, which is formed by vacuum resin infiltration process. The head that meets the aerodynamic linear requirements formed from this material has excellent impact resistance. The train has good dimensional stability when driving at 300 km/h.