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What should I pay attention to when choosing a textile auxiliary? Ⅰ

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1. Technician must master the basic knowledge of the auxiliary agent

This is the prerequisite for choosing the auxiliary. It is necessary to have a basic understanding of the basic concepts, basic structures, performance, and use characteristics of the additive. If abnormal conditions are found, you can also analyze the cause and deal with it in time. When using new additives, the suppliers must inform the structure category of the auxiliary, such as the soft agent of the application belongs to the soft silicon oil, the soft silicon oil agent, the fatamide soft agent, the imazolerine soft soft agent, the imazolerine soft softness Which category of doses and fatty acid paraffins should know. In this way, it can master its basic performance and prevent blind use.

2. The dissolution performance of the auxiliary and its stability of hard water and metal ions must have a basic understanding

For example, the solubility of the anion surface activated agent in alkaline is greater than the solubility in acidicity, and the cationic surfactant is vice to the vice. The first three types of surfactants increased the solubility when the temperature rose, rather than the ionic surfactant's solubility decreased with the temperature, so the turbidity point appeared, and the turbidity point must be higher than the use temperature, otherwise it will lose its efficiency. , Can't play the role of the auxiliary. The turbidity point increases with the increase of the number of EO. Rate with the amount of pussy additives. However, the content of the electrolyte increases and decreases. If it is used to add flat and high -pressure staining evenly or dispersant, the use temperature exceeds its turbidity (generally about 75 ° C). And cause color points. Organic silicon dispel agent is a emulsion made of non -ionic surfactants and white carbon black emulsification for non -ions. Often not paying attention to this problem, which is a great harm to the printing and dyeing plant.

3. The acid -resistant and alkaline resistance of the aid must be determined

This is convenient to understand whether the auxiliary can meet the needs of the process. The auxilizer has a great difference in acid and alkali resistance. The anion surface activated agent is generally resistant to acid resistance. Among them, phosphates are the best alkali resistance, while carboxylic acid is the worst acid resistance. The cationic surfactant is generally acid -resistant and inferior. Non -ion surface active agents can resist weak alkali and weak acids, not strong acid and strong alkali. The printing and dyeing factory must test whether the auxiliary used in the process of use will occur in turbidity or precipitation when used. A factory uses an imported auxiliary agent for liquid crawler to drift. No problem is found. The cloth surface is scattered with irregular colors. Open the box to see. The guide roller is a solid object with different thickness. It was originally a precipitation of the auxiliary that is not resistant to alkali. When it is stained on the cloth, the color point is formed. Therefore, the amount of alkali -resistant acid -resistant and acid -resistant use of the auxiliary must be determined. When practicing cold rolling piles, you should notice this.


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