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Plastic flame retardant is not a simple principle of fire protection

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Plastic flame retardant is not a simple principle of fire protection

Release date:2017-05-06 Author: Click:

Flame retardant as the name suggests is able to fire retardant plastic additives. In daily life, we often hear the "flame retardant" the term, but most of the understanding of flame retardants remain in the "fire" on the level of its fire principle is not very clear.

First, to provide a layer of oxygen and the isolation of the coating, such as phosphate flame retardant combustion generated when the phosphide that is oxygen barrier coating. Hard foam flame retardant

Second, the formation of free reaction with the plastic free radicals, from the flame retardant, and their reaction with the plastic product combustion performance is very poor.

Third, the absorption of heat generated by combustion, from cooling to slow down the role of the burning rate, such as aluminum hydroxide, it contains the chemical association of water as high as 34%, this associative water in most of the plastic processing temperature Under the stable, but more than 200 ℃ began to break down, the release of water vapor, and each decomposition of a mole of aluminum hydroxide, to absorb 36 kcal of heat

Fourth, there is a kind of gas can be stuffed with flame, such as antimony trioxide, it encountered in the pvc due to the combustion of the HCL when the reaction to produce a kind of boring gas, that is, antimony nitrogen oxides.

Plastic flame retardant behind is not just fire retardant so simple, in addition, will produce more than the above substances, and ultimately to achieve the purpose of preventing plastic burning.

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