摘要
为了提高还原染料母液稳定性及对间位芳纶染色后的耐日晒性,选用耐日晒性较好的蒽醌系还原染料红F3B、黄FG、蓝ER,以二氧化硫脲作为还原剂并采用干缸还原法配制隐色体母液技术对间位芳纶纱线染色.通过二氧化硫脲用量、氢氧化钠用量、染料用量、母液的还原温度及保温时间,研究母液稳定性对间位芳纶纱线染色效果及性能的影响.结果表明:所选3只染料用量均为20 g/L,氢氧化钠用量为20 g/L,还原温度为50℃时加入15 g/L的二氧化硫脲并保温8 min,母液的还原效果最佳.在染液3%(omf)时,采用红F3B染色样的K/S值为3.80;采用黄FG染色样的K/S值为5.37;采用蓝ER染色样的K/S值为4.91;其耐日晒色牢度及耐摩擦色牢度均大于等于3级,同时力学性能无显著变化.
Abstract
In order to improve the stability of the vat dyestuffs mother liquor and the and sunlight resistance of me-ta-aramid after dyeing,the anthraquinone-based vat dyestuffs red F3B,yellow FG,blue ER with good sunlight resistance were selected,and the thiourea dioxide was used as the reducing agent,and a cryptochrome mother liquor for dyeing meta-aramid yarns was prepared by he dry vat reduction method.The influence of the stability of the mother liquor on the dye-ing effect and performance of meta-aramid yarns was investigated by the dosage of reductant,sodium hydroxide,dye,re-duction temperature and holding time of the mother liquor.The results show that when the dosage of selected three dyes are all 20 g/L,the dosage of sodium hydroxide is 20 g/L,thiourea dioxide with the dosage of 15 g/L is added at 50℃,and the holding time is 8 min,the mother liquor has the best reduction effect.When the amount of dye used is 3%(omf),the K/S value of the sample stained with red F3B is 3.80,the K/S value of the sample stained with yellow FG is 5.37,the K/S value of the blue ER staining sample is 4.91.Its color fastness to sunlight and friction are both greater than or equal to lev-el 3,and there is no significant change in its mechanical properties.
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