The "development and application of high strength flame retardant glass fiber composite materials and products for rail transit" jointly completed by Southwest Jiaotong University, Guizhou Material Industry Technology Research Institute and Relevant Application Enterprises has passed the achievement appraisal recently in Chengdu, Sichuan Province. The new material "armor" of high-strength flame-retardant glass fiber is put on the rail power and emergency facilities, and the comprehensive performance indexes such as strength, flame retardant, corrosion resistance, insulation, heat conduction and water resistance meet the higher requirements.

"Rail facilities are always exposed to the sun and rain in the open air or dark and humid environment of the tunnel, so the comprehensive performance index requirements are high." Tian Debin, a member of the R & D team and senior engineer of China Railway No.8 Engineering Group Co., said that at present, there are mainly two types of composite materials for rail transit product research and development: carbon fiber reinforced composite material and glass fiber composite material. However, the former has high manufacturing cost and is mostly used in the research and development of locomotive and rolling stock products. In contrast, glass fiber composite materials are much better to be used for series product development.

"Especially in the field of rail transit cable tray, an urgent problem is that the cable tray installed on railway bridge is damaged in large area, which brings hidden danger to the normal operation of the rail." Hu Jidong, member of the R&D team and chief engineer of China Railway No.8 engineering group, said that the non combustible magnesite composite cable trough installed on site in the past was mainly made of magnesite powder, magnesium chloride and glass fiber cloth by hand lay method. The material not only has low strength, but also has certain brittleness, which may lead to large area damage and poor durability of cable trays.

The new achievement jointly completed by several enterprises, universities and research institutes has successfully solved the problem of uniform dispersion of inorganic particles in polymer matrix through surface composite modification of superfine inorganic flame retardant particles, and achieved the high performance of ultra-fine particle flame retardant polymer composites. Thus, glass fiber composites with high strength and flame retardant properties have been developed. Relying on this high-performance material, the R&D team has successively developed a series of products such as new glass fiber composite self-locking cable tray, SMC cable trays with installation hole structure, integrated switching cable trays and SMC independent emergency evacuation platform, which are widely used in many rail transit lines in Sichuan, Chongqing, Guizhou, etc For the first time in the field of rail transit. At present, 4 invention patents, 11 utility model patents and 6 appearance patents have been obtained.