Flame retardancy research of POLY TAFFETA textile containing phosphorus-nitrogen flame-retardant waterborne polyurethane

To improve flame retardant fabric, POLY TAFFETA fabric was treated by flame retardant waterborne polyurethane(PU) with phosphorus-nitrogen synergy effects. The performance of thermal stability and flame retardant of the treated fabric was investigated by TG, DSC and LOI, and the residue carbon layer was characterized by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The results show that, compared with the base fabric, the flame-resistant fabric reduces starting decomposition temperature and improves the thermal stability under high temperature and decomposition temperature range broadens. The LOI value is increased 5. 1% and the vertical combustibility could achieve GB/T5455-1997 B1 level. The fabric surface is clean after the combustion and forms integrate and smooth carbon layer without holes. The content of P in residue carbon is more than that in flame-resistant fabric, which has strong retardant ability of flame.