2023.03.22
(1) Covering effect: The phosphorus-based flame retardant in the foam machine generates a stable covering layer at a higher temperature of the EPS foam machine, covering the surface of polystyrene, making it difficult for the heat generated by combustion to pass into the material, making polystyrene The flammable gas generated by thermal decomposition of ethylene is difficult to escape, and it can isolate the material from the air, thereby inhibiting the cracking of the material and achieving the effect of flame retardancy.
(2) Dilution effect: when the thermosetting modified polystyrene board anti-foam plastic mechanical combustion coating is heated and decomposed, it can produce a large amount of non-combustible gas, so that the flammable gas produced by the decomposition of polystyrene and the oxygen in the air are diluted to reach Less than the flammable concentration range, thereby preventing the material from igniting and burning.
(3) Carbonization effect: The thermal degradation products of phosphorus-based flame retardants are used to promote the rapid dehydration and carbonization of the polymer surface, thereby forming a carbonized layer. Elemental carbon can’t produce evaporative combustion and decomposition combustion of flame. The final foam machine product obtained from the thermal decomposition of phosphorus-based flame retardants in the foam machine is polymetaphosphoric acid, which is a strong dehydrating agent and can promote further charring of materials. Therefore, it has the function of flame retardant protection.
(4) Inhibition effect (capturing free radicals): The combustion of polystyrene is mainly a chain reaction of free radicals. The substances contained in the flame retardant liquid produced by our company can correspond to the active intermediates HO·, H·, O ·, HOO·, etc., inhibit the chain reaction of free radicals, reduce the burning speed until the flame is extinguished.
(5) Reinforcing effect (synergistic effect): special synergistic materials are added to the foam machine. If some materials are used alone, they have no flame retardant effect or have little flame retardant effect. The combination of multiple materials can enhance the flame retardant effect. Effect. Therefore, our company chooses highly synergistic flame retardant materials for compound flame retardant modification.
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