Preparation of flame retardant Lyocell fiber and its properties
The nitrogen phosphorus flame retardant is used to finish the Lyocell fiber.The effects of the concentration of flame retardant,pH of finishing solution,soaking time,catalyst concentration,curing temperature and time on the properties of flame retardant Lyocell fiber are investigated,and the optimum flame retardant finishing process of Lyocell fiber is obtained as follows:flame retardant 300 g/L,catalyst 200 g/L,pH value of the finishing solution 7.0,immersing at 80 ℃ for 10 min,one-dip-one-pad with pickup of 65％,pre-drying at 110 ℃ for 10 min,and curing at 150 ℃ for 30 min.Under the optimal processing conditions,flame-retardant Lyocell fibers have good durability to alkali washing and water washing.
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