活性染料对大豆纤维的匀染性能

Level dyeing behavior of reactive dyes for soybean fibers

通过测试活性染料对大豆纤维的固着速率曲线、相对固着速率和移染性能 ,探讨活性染料在纤维上的匀染性。研究结果表明 ,直接性高、活性基反应强的染料 (如CibacronLS)加碱前的移染性差 ,固着率高 ,匀染性差 ;而加碱后的固着速率不快。直接性不高的染料 (如LevafixCA和MegafixB)加碱前的移染性好 ,固着率低 ,匀染性好 ;而加碱后的固着速率较快 ,匀染性差。文中针对移染性能和固着速率不同的活性染料 。

The level dyeing behavior of reactive dyes for soybean fibers was discussed from the point of view of the fixation rate curve, relative fixation rate and migrat ion behavior. The results show that the reactive dyes(e.g. Cibacron LS) of high substantivity and activity exhibit poorer migration, higher fixation percent and poorer levelness before the addition of alkali, and exhibit slower fixation rat e and better levelness after the addition of alkali than those of low substantiv ity(e.g. Levafix CA and Megafix B). The methods increasing the dyeing levelness were suggested for the reactive dyes of different migrating properties and fixat ion rates.