With the acceleration of urbanization and the continuous extension of rail transit lines, public safety has become one of the core issues in urban operation. In recent years, silicone foam has gradually become an important functional material in the rail transit industry due to its excellent thermal stability, flame retardancy and environmental protection performance. After flame retardant modification, this type of material has been widely used in multiple key scenarios, such as subway car seat fillers, interior sound insulation layers, and cable insulation layers, effectively curbing the spread of fire and improving the overall safety protection level.

The paper points out that the flame retardant technology of silicone foam mainly includes two types of paths: one is additive flame retardants, such as aluminum hydroxide, antimony trioxide, etc., which form an insulating carbon layer in the material; The second is reactive flame retardant, which introduces elements such as phosphorus and nitrogen through molecular chains to form protective bubbles and inert layers during the initial combustion stage, suppressing the release of smoke and toxic gases. The combination of these technologies enables silicone foam to have more excellent comprehensive performance, which is particularly applicable to the rail transit system with long operation time and dense personnel.

In the current context of "dual carbon", the environmental friendliness and durability of this material have also received attention. Compared with traditional flame retardant materials, organosilicon foam is halogen-free, environmentally friendly, and has a longer life. It not only ensures safety, but also conforms to the concept of green development. With more rail transit projects putting forward higher requirements for material properties, the market application prospect of silicone foam is very broad.

Flame retardant rubber for extrusion, plz check MY DZ250