Wet-on-wet steam flame-retardant finishing of dyed pure cotton canvas

The flame-retardant finishing of conventional pad-dry-cure technology often causes the loss of breaking strength and shade change of fabrics,thus influencing their serviceability.For this reason,wet-on-wet steam flame-retardant finish was used for dyed pure cotton canvas.The influence of mass concentration of flame-retardant,catalyst dosage,steaming temperature,etc.on the result of flame-retardant finishing,breaking strength and shade of the canvas was investigated.Orthogonal analysis was used to optimize the process conditions.The experimental results revealed that compared with the conventional flame-retardant finish process,this process imparted to the finished fabric equivalent flame-retardant effect,but better other properties such as breaking strength,in particular,the shade.The optimum process conditions are: flame-retardant CFR 350 g/L,catalyst C52 40 g/L,steaming temperature 140 ℃,and duration 30 min.