Preparation and properties of 83 dtex/24 f flame retardant nylon 66 fiber
Using nylon 66 chip with a relative viscosity of 2.52 as raw material and flame retardant masterbatch with a relative viscosity of 2.75 as a modifier,83 dtex/24 f flame retardant nylon 66 fiber was prepared by blending and melt spinning the flame retardant masterbatch with nylon 66 chip through online addition.The active constitute of flame retardant masterbatch was ana-lyzed.The effects of flame retardant masterbatch addition and spinning temperature on the flame retardant and mechanical proper-ties of the fiber were emphatically studied.The results showed that the flame retardant masterbatch contained the active constitute of phosphoras and nitrogen with nylon 66 as the matrix;the limit oxygen index(LOI)of the fiber increased with the addition of flame retardant masterbatch,however,the LOI did not increase significantly and the spinnability became poor when the mass fraction of flame retardant masterbatch was higher than 5%;the fiber breaking strength first increased and then decreased with the elevation of spinning temperature and reached its maximum at a spinning temperature of 285℃;and the 83 dtex/24 f flame retardant nylon 66 fiber prepared had good flame retardance and mechanical properties,with a breaking strength of 4.16 cN/dtex and a LOI of 32.3%,under the optimal process conditions of 5%flame retardant masterbatch by mass fraction,spinning temper-ature of 285℃,spinning speed of 3 200 m/min and draw ratio of 2.7.
万方数据
维普
