半染时间

由半染时间和平衡上染百分率综合考虑得出，扩散系数D比染色速率常数（K′）更能充分说明，染料对竹纤维的上染性能较棉和粘胶好。

Diffusion coefficient deduced from the half-dyeing time and equilibrium dyeing percentage , compared with dyeing velocity coefficient , illustrates that the dyeing behavior of the dyestuff is much better in bamboo fiber than in cotton and viscose fibers .

研究结果表明，PTT纤维的染色速率常数高于PET纤维，半染时间明显短于PET纤维，临界染色温度约比PET纤维低15~20℃，染色转变温度则比PET纤维低20℃。

Compared with PET , PTT showed higher dyeing rate constant and shorter half-dyeing time . The critical dyeing temperature range and dyeing transition temperature of PTT were 15 ~ 20 ℃ and 20 ℃ lower than that of PET respectively .

可用半染时间预测染料的配伍值，其M和K参数可直观地反映染料的亲和力和扩散系数。

Response to the dyeing affinity and the diffusion coefficient .

提纯染料对PTT纤维的染色速率常数高于PET纤维，半染时间也短，而且染色速率随染色温度的升高而增加。

The dyeing rate constant of pure dyes ( C.I. Disperse Blue 56 and Orange 30 ) for PTT , increasing with increasing dyeing temperature , is higher than that of PET and has shorter half-dyeing time .

结果表明：对染料进行微胶囊化并没有改变分散染料的扩散系数、扩散速率，但改变了染色速率常数及半染时间。

The results showed that microencapsulating the disperse dyes did not change the disperse dyes'diffusion coefficient and diffusion rate , while it changed the dyeing velocity and half-dyeing time .