"Development and application of high-strength flame-retardant glass fiber composite materials and products for rail transit" jointly developed by China's leading composite material manufacturer ZTBJ Composite Materials Technology Group, Southwest Jiaotong University, and Guizhou Institute of Materials Industry and Technology Chengdu passed the results appraisal. By "putting on" high-strength flame-retardant glass fiber new material "armor" for rail power and emergency facilities, its comprehensive performance indicators of strength, flame retardancy, corrosion resistance, insulation, thermal conductivity, and water resistance have all met higher requirements.
"Rail facilities are exposed to open-air exposure to rain or tunnels in dark and humid environments all year round. The comprehensive performance indicators are relatively high." Tian Debin, a member of the R&D team and a senior engineer of ZTBJ, said that the composite materials currently available for the development of rail transit products are mainly carbon fiber reinforced There are two types of composite materials and glass fiber composite materials, but the former has higher manufacturing cost and is mostly used in the research and development of rolling stock products. In comparison, the use of glass fiber composite materials for the development of series products has better promotion and application value.
"Especially in the field of track cable ducts, an imminent problem is the large-scale damage to the cable ducts installed on railway bridges, which brings potential safety hazards to the normal operation of the line." Hu Jidong, member of the R&D team and chief engineer of ZTBJ Electric Power It is said that the railway communication signal non-combustible magnesite composite cable duct installed on site in the past is mainly made of magnesite powder, magnesium chloride and glass fiber cloth by hand lay-up method. It leads to large-area cable channel damage and poor durability.
Through the surface composite modification of ultrafine inorganic flame retardant particles, the problem of uniform dispersion of inorganic particles in the polymer matrix has been successfully solved, and the high performance of ultrafine particle flame retardant polymer composite materials has been achieved, thus developing both high strength , Flame retardant glass fiber composite material. Relying on this high-performance material, the R&D team has successively developed new fiberglass composite material self-locking cable troughs, sheet-film plastic cable troughs with mounting hole structures, integral turning cable troughs and track bed sheet-film plastic independent Emergency evacuation platform and other products are widely used in many rail transit lines in Sichuan, Chongqing, Guizhou, etc., many of which are used for the first time in the field of rail transit. At present, the project has obtained 4 invention patents, 11 utility model patents, and 6 appearance patents.