抗起球腈纶纺丝工艺的优化

Optimization of spinning process of anti-pilling acrylic fiber

采用纺丝工艺调整法生产抗起球腈纶。结果表明:在抗起球腈纶生产工艺基础上,选择孔径相对较小的喷丝板,提高负拉伸比,有利于纤维成形;干燥机丝束堆积密度下调3%,湿球温度上调至77～80℃,采用加压过热蒸汽为热定型介质,热定型温度110～115℃,生产的抗起球腈纶抗起球级数达4.0～4.5。

An anti-pilling acrylic fiber was prepared by adjusting spinning process. The results showed that the fiber formation would be beneficial from selecting the spinneret with relatively low orifice diameter and increasing the negative stretch ratio based on the traditional acrylic fiber production process. The obtained anti-pilling acrylic fiber had the anti-pilling grade of 4.0 - 4.5 when the tow bulk density of the drying machine was decreased by 3% , the wet bulb temperature was elevated to 77 - 80 ℃, the pressure overheated steam was adopted as heat setting medium and the heat setting temperature was 110 -115 ℃.