How to apply TPU flame retardant and fireproof film to subway car interiors

The application of TPU flame-retardant and fire-proof film in subway car interiors is mainly reflected in the following aspects.

The first is the application of the seat. The surface of subway seats can be covered with TPU flame-retardant film. The film has excellent wear resistance and scratch resistance and can withstand the friction caused by daily use by passengers. At the same time, its flame retardant properties can effectively prevent the spread of flames and reduce the risk of fire.

The second is the decorative protection of the compartment walls and roof. The fire-retardant film can be adhered to the surface of the interior panel through adhesive lamination or hot pressing process. It not only provides a beautiful decorative effect, but also meets the strict requirements of rail transit on the smoke density and toxicity of the material. The subway is an underground enclosed space. Once a fire breaks out, smoke and toxic gases will be extremely harmful. Therefore, the low smoke and low toxicity characteristics of the fireproof film are particularly important.

The third is the covering treatment of handrails, pull rings, door frame corners and other parts. The TPU film is soft to the touch and can improve passenger comfort while preventing component surface wear and extending service life.

In terms of construction technology, vacuum adsorption, thermoforming or adhesive bonding are usually used to make the film and the substrate closely fit, and the corners need to be trimmed to ensure a smooth and beautiful appearance without warping. Before construction, the surface of the substrate should be cleaned and degreased to ensure firm adhesion. The construction environment must be kept dry and dust-free to avoid bubbles.

In addition, TPU flame-retardant and fire-proof films used in subway carriages must pass relevant fire protection certifications, and indicators such as combustion performance and smoke density levels must meet the rail transit industry standards. Its surface is easy to clean and resistant to disinfectant wiping, which also facilitates daily maintenance. It is very suitable for subway operating environments with large flow of people and high cleaning frequency, taking into account both safety and economy.