In the fire hazard environment, people need to avoid flame damage by wearing thermal protective clothing. Thermal protective clothing is used to protect firefighters, steel workers and other workers who work in high temperature dangerous places. As the time of clothing exposed to the flame increases, the surface temperature of the clothing will gradually increase due to the direct burning of the flame, and a large amount of heat transfer will make the air layer under the clothing and the surface temperature of the human body rise at the same time. When the clothing is burned by flames, not only the thermal physical properties of the fabric itself will change and affect its thermal protection performance, but also after leaving the flash fire environment, the surface temperature of the clothing will still remain in a relatively high range, and it will be different from the clothing under the clothing And the temperature of the surface of the human body forms a temperature difference, and the continuous heat transfer causes the surface temperature of the human body to continue to rise.
Some studies have shown that burns can occur after the flash fire is over, and in addition the energy stored within the fabric is an important factor in predicting burns. Therefore, even though thermal protective clothing can resist flames for a short period of time, the garment can still cause burns to occur during the cooling process. Therefore, it is particularly important to study the temperature change of the garment and the human surface after burning.
A study of multi-layer protective clothing using the Burning Manikin System showed that the outer fabric has an important influence on the protective performance of multi-layer protective clothing. Tests using the TPP apparatus revealed that prolonged exposure to heat sources with low heat flow is more likely to result in burns than short periods of intense burning. In the actual wearing process, the thermal protection performance of clothing not only depends on the performance of the fabric itself, but also needs to be considered in terms of clothing style design, specifications and dressing posture. In order to simulate as realistically as possible the situation of the human body in the actual fire and to safely and accurately determine the surface temperature of clothing and the human body, the Burning Manikin System test method has shown its advantages and has been applied in the field of thermal protection.