Abstract: By simulating the smoke pollution situation of firefighting protective clothing exposed at fire scene, the attachment mode of soot particles on firefighting protective clothing and the pollution characteristics between each fabric layer are studied, and the efficiency of washing process removing the contaminants on each layer is discussed. Results show that, except contaminating the surface layer of flame retardant, the soot particles can contaminate the comfortable inner layer through opening on the clothing. The contaminates on comfortable inner layer are mostly soot particles smaller than 2 μm, and are easier to spread between the layers. Different fabric has different toxic contaminate concentration. Semi volatile organic compounds pollution concentrates on waterproof and breathable layer. Heavy metal pollution concentrates on heat insulation and comfortable layer. Normal dipping and machine-washing technology can barely remove the small particles attached to the surface of the fabric. The removal rate of toxic pollution is lower than 45%. The study can provide support for high efficient cleaning of firefighting protective clothing.

Key words: firefighting protective clothing, multi- layer structure, smoke pollution, decontamination