As a kind of surfactant, flattening and adding O can reduce the surface tension of the solution. When its concentration is below the critical micelle concentration, the surface tension of the solution decreases with the increase of the level of O and the concentration of O. Then the change in surface tension is small. The reduction of the surface tension of the dyeing liquid is beneficial to the dyeing liquid to wet the fiber, which is beneficial to the dyeing and spreading of the dye. On the other hand, the addition of O can also form a certain combination with the dye, and the degree of binding generally increases with the increase of the level of O and O. The combination of the flat addition of O and the dye reduces the dye uptake speed.
The effect of leveling agent in dyeing is to reduce the initial dyeing rate to obtain uniform dyeing, which is to improve the dyeing property, so that the dyeing unevenness at the initial stage of dyeing can be leveled by transfer dyeing. The concentration is too low, but instead The dyeing rate is improved, the transferability is not improved, and there is no leveling effect. The use concentration is too high, although it has a leveling effect, it will reduce the dye utilization and increase the cost. It is recommended to take measures when using the flattening plus 0 in the actual dyeing: Leveling plus 0 concentration in the range of 1 ~ 2%, at this time, the initial dyeing rate is increased less, the transferability is improved, and the percentage of dyeing at the end of dyeing is more affected. small. Pingping plus O is added to the dye bath after dyeing for a period of time, so that the initial dyeing rate is not increased by the addition of 0 plus. Pingping plus O is used together with Yuanming powder. Yuanming powder can reduce the initial dyeing rate and improve the transferability. In this way, the initial dyeing rate caused by the flattening and O addition can be offset or offset by the decrease of the initial dyeing rate caused by the Yuanming powder, and then the transfer of the flat and O and Yuanming powder can be used to obtain the uniformity. dye. Finally, it should be noted that since the flat addition of O can improve the wettability of the dyeing solution, it is advantageous to reduce the uneven dyeing caused by the difference in the wettability of the wool itself.
The role played by Pingping Plus 0 in the dyeing of wool with weak acid dyes cannot be said to be a slow-acting effect or a leveling effect. Studies have shown that when the level of O is low, the dyeing of weakly acid dyed cups is first dyed. The rate is increased, and the initial dyeing rate is lower than when there is no more than 5%. When the concentration of O is only above 1%, the transferability is better than when it is not flat. Therefore, in practical application, in order to balance the influence of the concentration of the flattening plus 0 on the initial dyeing rate, the transferability, and the percentage of dyeing at the end of dyeing, there should be a reasonable range of dosage and appropriate application methods.