Its combustion products of the thermal cracking, thermal cracking process various different fibre.Metal soap
Retardant mechanism covering theory: flame retardants> 500 ℃ when there are isolated in fibre surface overlay effect, in addition to hinder O2 supply, but also to prevent the outward diffusion of combustible gas, so as to achieve flame purposes, such as borax - boric acid. Gas On: first flame in the combustion temperature, the decomposition of combustible gas, the concentration of flammable gas diluted to below the concentration to produce the flame; other under heat, flame retardants, can be used as a high reactivity Tour group transfer body, thereby preventing the radical reaction.impact modifier
Hot theory: First, flame retardants at high temperatures endothermic changes, such as melting and sublimation, thereby preventing the spread of combustion, the other is fibre rapid cooling, so that the fabric can not reach the combustion temperature. Mainly refers to changing the catalytic dehydration of the thermal cracking process fibre. As flame retardant cellulose molecule chain can occur before the break and a large number of rapid dehydration, and even some of the crosslinking, prevent the formation of L-glucose, to a combustion flame is suppressed.
Organophosphorus flame retardant compounds which may be due to the hydroxyl group in the cellulose molecule form an ester, to prevent the formation of L-glucose, and further dehydration of the cellulose to form an unsaturated double bond, and promote the formation of cross-linking between cellulose molecules, to increase The formation of carbon substance, blocking smoldering better. Only when finishing dosage increased to 10% in order to effectively prevent flaming combustion.
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