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The Flame Retardant Principle of Flame-retardant Cotton Fabric

2015-11-25 09:03 | writer: admin

Cotton flame retardant fabric pad fire retardant liquid, flame retardant and the amide form prepolymer infiltrated into the amorphous region and the gap in the fiber, and then in the ammonia NH3 and pre shrinking by methyl crosslinking in the body, forming a flame retardant polymer inside fibre after oxidation to stability. Phosphorus containing compound fiber dehydration reactions during pyrolysis. Phosphorus containing flame retardant in fiber pyrolysis temperature range is first decomposed into less volatile phosphate or polyphosphate drunk and fiber based (-OH) by dehydration, make the fiber carbonization. Impregnated fabric over a flame retardant agent in ammonia process, because the cellulose formed a highly crosslinked polymer oxidative / n two, produce P-N synergistic effect. The P-N key performance (polar) higher than that of the P-O key, the phosphorus compounds and reaction performance of -OH strengthened, so produce flame retardant properties.
The so-called "flame" does not mean that the fabric with flame retardant fabric after finishing that has the characteristic is not the fire burning, but to reduce the flammability of cotton flame retardant fabric in the flame, so that the combustion part area decrease and reduce its combustion rate. Stop burning flame left, has the capability of self extinguishing.

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