Flame retardant principle: To figure out the principle of flame retardant fabric, we must first understand the combustion process of fabric. The combustion process of fabric is an extremely complex thermal oxidation reaction, resulting in the basic elements of combustion for heat, oxygen and combustible gases.
It is generally believed that the combustion of fabrics goes through the following three stages. Thermal initiation process, thermal degradation process and ignition process. The principle of flame retardant of fabric is that a certain amount of flame retardant is added to the fabric, which can make the oxygen index increase and the flame retardant effect is obvious.
Principle of combustion dummy.
In the combustion simulation environment laboratory, a total of 6 groups of 12 flamethrowers are installed around the combustion dummy, each flamethrower can provide 84 (kw/m2) heat flow in 2 to 3 seconds, realistically simulating the real fire scene critical state of deflagration flash fire.
At the end of the experiment, by analyzing the data output from each sensor on the dummy and calculating the heat flow, the burn level, the total burn area, and the time to constitute secondary and tertiary burns on the skin surface where each sensor is located can be accurately reported.