Preparation and properties of flame retardant knitted fabric by coating

To get a knitted fabric with better flame retardance,first of all,the knitted fabric was finished by padding flame retardant,and then coated with polyurethane(PU) which contains flame retardant.The optimum transfer coating process is obtained by orthogonal experiment: the surface layer thickness of 0.1 mm,drying at 100 ℃ for 1 min,and the bonding layer thickness of 0.1 mm,drying at 120 ℃ for 2 min.The tests show that both the hidden burning time and continued burning time of the flame retardant coated knitted fabric manufactured according to the optimum coating process are 0 second,and the damage length 10.5 cm.After 20 washing cycles,the fabric hidden burning time and continued burning time are still 0 second,and the damage length 15.5 cm.The results indicate that the coated fabric has good flame retardance and washing durability.