匀染剂在分散染料染色涤纶织物变色中的作用机理

Action mechanism of leveling agent in the color change of polyester fabrics dyed by disperse dyes

为研究匀染剂在分散染料染色涤纶织物变色中的作用机理,系统分析添加匀染剂对分散染料染色涤纶织物产生色差的原因。通过分析匀染剂对分散染料在涤纶纤维上的状态与在染液中状态的变化,探讨其造成染色织物变色的原因;通过确定影响染色织物变色的关键因素,揭示匀染剂在分散染料染色涤纶织物变色中的作用机理。结果表明:在染色过程中纤维上和染浴中的染料都未发生化学变化;匀染剂在分散染料染色涤纶织物变色中的作用机理是匀染剂使染料的聚集态发生变化,从而改变了染料的上染率;根据提升性拟合直线方程计算染料量并染色,分散翠兰S-GL添加匀染剂TF-212K和TF-2500染色织物的色差ΔE值从1.64和1.05分别减小到0.73和0.23,其他颜色参数也都有所减小,可见通过调整染料用量可有效减小使用匀染剂染色时易产生的色差问题。

In order to study the action mechanism of the leveling agent in the color change of polyester fabrics dyed disperse dyes,the reason for the color difference caused by the addition of leveling agent to the polyester fabric dyed by disperse dyes was analyzed.The reasons for the color change of dyed fabrics were studied by analyzing the state of disperse dye on the polyester fiber and in the dyeing solution with the presence of the leveling agent.The mechanism of the leveling agent in the color change of polyester fabrics dyed by disperse dyes was revealed by determining the key factors affecting the color change of dyed fabrics.The results show,there was no chemical change of the dye on the fiber or in the dye bath during the dyeing process,and the action mechanism of the leveling agent in the color change of polyester fabrics dyed by disperse dyes is that the leveling agent changes the aggregation state of the dye,there by changing the dye uptake rate of the dye.The amount of dyes was calculated according to the fitted straight line equation and then dyeing was conducted.After adding the TF-212 K and TF-2500,theΔE value of the dyed fabrics for the C.I.dispersed blue S-GL was reduced from 1.64 and 1.05 to 0.73 and 0.23 respectively,and other color parameters were also reduced.Hence,in order to resolve the color difference caused by dyeing with a leveling agent,the amount of dyes can be adjusted.