Rail transit refers to a type of vehicle or transportation system in which a vehicle is required to travel on a particular track. The most typical rail transit is a rail system consisting of a traditional train and a standard railway. With the diversified development of train and railway technology, rail transit presents more and more types, not only spread over long-distance land transport, but also widely used in medium- and short-distance urban public transport. Rail transit is generally divided into three categories: national railway system, intercity rail transit and urban rail transit.

The application of Welfield flame retardant products includes track waterproofing board, geomembrane, railway roadbed, and pressure-resistant pavement extruded board.

Applications
PE/EVA flame retardant masterbatch (WF-HE210)
Applicable processes: blown film, laminating, foaming, injection molding, extrusion.
Application products: rail transportation industry such as waterproof board, geomembrane, etc., all kinds of PE, EVA film, laminating film, cast film, tarpaulin and other products.

XPS flame retardant masterbatch (WF-HE501)
Applicable process: extrusion, foaming.
Application products: rail transit materials such as railways, highway foundations, high-pressure resistant road surfaces, etc.

EPS flame retardant masterbatch (WF-HE502)
Applicable processes: foaming, extrusion, injection molding.
Application products: rail transit materials such as railways, highway foundations, high-pressure resistant road surfaces, etc.