Study on the dyeing process of wool at low temperature with additive WMJ

The dyeing process and the performance of weak acid dyes using additive WMJ for wool at low temperatures are studied.The results show that the dose of WMJ is 1% in medium or shallow colors and 3%(owf)in deep color.The pretreatment for wool is at 40 ℃ for 20 minutes,dyeing temperature is 85 ℃.Using this dyeing process for wool,the dyeing temperature,dyeing time and energy consumption are reduced.Simultaneously,compared with the conventional boiling dyeing process,the low temperature dyeing process makes wool fibers obtain deeper colors and better colour fastness,reduces the strength loss of the wool fibers.It can effectively solve some defects caused by the conventional boiling dyeing such as yellowing,dull,felt,strength loss.