What is the cause of color flowers?

Color flower is the most common and common quality problem in dyeing process. The reasons are as follows:

① Process formulation and operation problems

Unreasonable formulating process or improper operation will produce colored flowers.

② Equipment problems

For example, the temperature in the oven of the heat-setting machine after dyeing polyester with disperse dyes is different, and it is easy to produce chromatic aberration, and the insufficient pump force of the rope dyeing machine is also easy to cause color.

③ Dye problem

The dyes are easy to aggregate, have poor solubility, poor compatibility, and are too sensitive to temperature and pH, which are prone to color flower and color difference. Such as active turquoise orchid KN-R is easy to produce colored flowers.

④ Water quality problems

Poor water quality, resulting in the combination of dyes and metal ions or the agglomeration of dyes and impurities, resulting in color flower, light color and no sample attached.

⑤ Auxiliary problem

For the problem of auxiliary agents, the auxiliary agents related to color flower mainly include penetrating agent, leveling agent, chelating dispersing agent, PH value control agent, etc. The penetrating power of the penetrant is not enough, and it is easy to cause uneven penetration of the dye solution and color flowers, such as loose cotton dyeing, cheese dyeing, and heavy fabric dyeing. The role of penetrant cannot be ignored. Some factory penetrants only believe in authentic JFC, but It is not considered that the cloud point of JFC is only 38-42 °C, and if it exceeds 42 °C, its penetration force cannot be exerted, which will cause quality problems.

There are various leveling agents for polyester, cotton, wool nylon and acrylic. The quality is uneven. The leveling agent must take into account the dispersing and solubilizing effect of dyes, the effect of retarding dyeing and dyeing, and the role of penetration. Even for the complexation of metal ions in water, and factors such as its PH applicability, foamability, etc. on the coloring rate must be considered, leveling agents are indispensable for improving color patterns, color spots, etc. The leveling agent in the factory is only a solution of diffusing agent N, but it is not expected that the anti-dye aggregation effect of diffusing agent N at high temperature is greatly reduced.

Some factories choose non-ionic surfactants that are not suitable, which cause the non-ionic surfactants to separate out above the cloud point, and absorb dyes to form tar-like substances that stick to the fabric equipment, but cause quality problems. The quality of the chelating dispersant is also related to the leveling problem. At present, under the condition that the water quality is getting worse and worse, more attention should be paid to the help of the chelating dispersing agent on the leveling.

The problem of pH control is a problem that each factory does not pay much attention to. In some factories, the pH of each tank of dyeing is different, and the quality of the substitute acid used by some factories is different, such as containing phosphoric acid, and the pH generated by the tertiary ionization of phosphoric acid is uniform. There are differences, how to control the uniform pH value? Some factories use PH slip agent, but do not grasp the relationship between temperature and time and the PH value generated by the slip agent, and PH control is impossible, so the phenomenon of color flower and color difference continues to occur.