Principle of Flame Retardant Treatment

Endothermic effect: The amount of heat released by any combustion in a short period of time is limited. If part of the heat released by the fire source can be absorbed in a short period of time, the temperature of the flame will be lowered, radiating to the burning surface and acting on the already The heat of pyrolysis of vaporized combustible molecules into free radicals will be reduced, and the combustion reaction will be inhibited to a certain extent.

Endothermic effect:

Under high temperature conditions, the flame retardant undergoes a strong endothermic reaction, absorbing part of the heat released by combustion, reducing the surface temperature of combustibles, effectively inhibiting the generation of combustible gases and preventing the spread of combustion. The flame retardant mechanism of Al(OH)3 flame retardant is to increase the heat capacity of the polymer so that it can absorb more heat before reaching the thermal decomposition temperature, thereby improving its flame retardant performance. This kind of flame retardant gives full play to its large heat absorption characteristics when combined with water vapor, and improves its own flame retardant ability.

Covering effect:

After adding the flame retardant to the combustible material, the flame retardant can form a glassy or stable foam covering layer at high temperature, insulate oxygen, have the functions of heat insulation, oxygen insulation, and prevent combustible gas from escaping, so as to achieve flame retardancy purpose. For example, organic phosphorus-inhibiting flame retardants can produce cross-linked solid substances or carbonized layers with a more stable structure when heated. The formation of the carbonized layer can prevent the polymer from further pyrolysis, and on the other hand, it can prevent the thermal decomposition products inside it from entering the gas phase to participate in the combustion process.

Chain reaction:

According to the chain reaction theory of combustion, free radicals are needed to maintain combustion. Flame retardants can act on the gas phase combustion zone to capture free radicals in the combustion reaction, thereby preventing the spread of flames, reducing the flame density in the combustion zone, and ultimately reducing the combustion reaction speed until it stops.

Non-combustible gas suffocation:

The flame retardant decomposes incombustible gas when heated, and dilutes the concentration of combustible gas from combustibles to below the lower combustion limit. At the same time, it also dilutes the oxygen concentration in the combustion zone, prevents the combustion from continuing, and achieves the effect of flame retardancy.

Ruico experts in all kinds of flame retardant treatments, provide complete solutions for textiles. Contact us if needed.

Shawn

Regional Sales Manager

Zhejiang Ruico Advanced Materials Co., Ltd. (Stock No.873233)

Add: No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China 313018

Phone: +86 (572) 2903236

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