Knowledge related to flame retardant fabrics – flame retardant mechanism
Tag:
Flame retardant fabric, flame retardant mechanism, flame retardant effect, flame retardant
1. Covering layer theory: Flame retardants can form a glass-like or stable foam covering layer at high temperatures, which has the functions of heat insulation, oxygen isolation, preventing flammable gases from escaping outward, and plays a flame retardant role. 2. Non-combustible gas theory: The flame retardant decomposes when heated to produce non-combustible gas, which dilutes the concentration of combustible gas decomposed from cellulose to below the lower combustion limit. 3. Endothermic theory: Flame retardants undergo endothermic reactions at high temperatures, lowering the temperature and preventing the spread of combustion. In addition, the heat can be transferred out quickly after fabric finishing, so that the cellulose cannot reach the temperature of ignition and combustion. 4. Chemical reaction theory (catalytic dehydration theory): The flame retardant reacts as a Lewis acid with cellulose at high temperatures, causing the fiber to catalytically dehydrate and carbonize, thereby reducing the generation of flammable gases.
：Textile
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