Cotton flame retardant fabric principle

After immersion liquid ran over retardant fabric , flame retardant fabric formed Thalidomide shrinking body penetrate into the fibers and the gap in the amorphous region , followed by the NH3 Ammonia shrinking in the body of the pre- crosslinking by methylation in formed inside the flame-retardant polymer fibers after oxidation to stabilize .Phosphorus-containing compound so that the fibers produced during the pyrolysis dehydration reaction .
Phosphorus-containing flame retardant in the fiber pyrolysis temperature range is first broken down into non-volatile phosphoric acid or polyphosphoric acid and fiber drunk by group (-OH) dehydration reaction , the fibers charring. Ran over the flame retardant fabric soaked Ammonia process , since the cellulose phosphate formed inside dioxide / nitrogen highly crosslinked polymer , generating the PN synergy. PN bond performance ( polar ) PO bond is higher than that of phosphorus compounds react with -OH enhance performance , so generating a flame retardant properties.
The so-called " flame retardant " does not mean the fabric is treated with a flame retardant finishing after the fire is not burning properties , but to make fabric flame reduce its flammability, combustion and lower part of the area to reduce its burn rate . Be stopped after leaving the flame burning, self-extinguishing performance.