560 dtex/72 f三叶形阻燃尼龙66 FDY生产工艺探讨  

Production process of 560 dtex/72 f trilobal flame retardant nylon 66 FDY

作　　者：张超 ZHANG Chao(Shenma Industrial Co.,Ltd.,Pingdingshan 467000)

机构地区：[1]神马实业股份有限公司,河南平顶山467000

出　　处：《合成纤维工业》2024年第1期76-80,共5页China Synthetic Fiber Industry

摘　　要：以相对黏度2.28的尼龙66切片为原料,共混添加氮系阻燃剂三聚氰胺氰尿酸盐(MCA)质量分数50%的阻燃母粒,在切片纺生产线上通过熔融纺丝生产560 dtex/72 f三叶形阻燃尼龙66全拉伸丝(FDY),探讨了主要生产工艺条件。结果表明:较佳的生产工艺条件为添加阻燃母粒质量分数5%,采用18孔喷丝板、三叶形喷丝孔呈菱形排布,熔体管道温度270℃,纺丝箱体温度281℃,侧吹风速度0.5~0.6 m/s,第三热辊温度190℃,卷绕速度2600~2800 m/min;在较佳生产工艺条件下,生产过程稳定,产品优等品率为91%、满筒率为82%,纤维具有良好的力学性能及阻燃性能,其断裂强度4.4 cN/dtex、断裂伸长率40.7%、干热收缩率6.1%、条干不匀率1.2%、极限氧指数27.5%。A nylon 66 chip with a relative viscosity of 2.28 used as raw material was blended with a flame retardant masterbatch with 50%melamine cyanurate(MCA),a nitrogen based flame retardant,by mass fraction to produce 560 dtex/72 f trilobal flame retardant nylon 66 fully drawn yarn(FDY)by melt spinning on a chip spinning production line.The main production process conditions were explored.The results showed that the spinning process was stable with a top-quality rate of 91%and full-package rate of 82%and the produced fiber had good mechanical properties and flame retardance,including breaking strength of 4.4 cN/dtex,elongation at break of 40.7%,dry hot shrinkage of 6.1%,yarn irregularity of 1.2%and limiting oxygen index of 27.5%when the spinning process conditions were optimized as followed:5%MCA flame retardant masterbatch by mass fraction,18-hole spinneret with trilobal spinneret holes in diamond arrangement,melt pipeline temperature of 270℃,spinning box temperature of 281℃,cross air blow speed of 0.5-0.6 m/s,third hot roller temperature of 190℃and winding speed of 2600-2800 m/min.

关 键 词：尼龙66纤维 全拉伸丝 异形纤维 阻燃剂 生产工艺 

分 类 号：TQ342.12[化学工程—化纤工业]