STUDIES ON THE DEVELOPMENT OF THE DIRECT MEASUREMENTS METHOD OF THE TRANSIENT PHENOMENA IN DIP DYEING

研制了一种新的实验装置，用于分析快速耗尽条件下染色过程开始后几秒钟的初始阶段。采用0.002% pH 6.4的亚甲基蓝溶液，以500:1的液比，在90‰的温度下对阳离子可染腈纶进行染色。染色前将纤维置于90°C的蒸汽气氛中30分钟。在染料槽中直接插入多根光学玻璃纤维，检测了668 nm单慢光束的透射率。纤维中染料平衡浓度（EC）的6%在1秒前被吸附。在阳离子可染色聚酯纤维的情况下，9%的EC在同一时期被吸附。纤维-仿射流平剂和阳离子表面活性剂的加入使染料的吸收率降低，丙烯酸和聚酯的同期吸收率分别为1.2%和7.2%。

A new experimental apparatus has been developed for analyzing the initial stage of several seconds from the start of the dyeing process under rapid exhaustion conditions. A cationic dyeable acrylic fiber was dyed at 90ﾟC with 0.002% methylene blue solution of pH 6.4 with a 500 : 1 liquor ratio. The fiber was left in the 90ﾟC steamed atmosphere for 30 minutes before dyeing. The wave length of the 668 nm monochronic light beam transmittance was detected with multiple optical glass fibers directly inserted in the dyebath. Six percent of the equilibrium concentration (EC) of the dye in the fiber was adsorbed before 1 second. In case of a cationic dyeable polyester fiber, 9% of the EC was adsorbed in the same period. The addition of a fiber-affine leveling agent, cationic surfactant resulted in the reterdation of dye uptake, namely 1.2% and 7.2% uptake in the same period for acrylic and polyester respectively.