In order to adapt to the development of textile industry, textile auxiliaries have many members. Each member has different responsibilities, such as leveling, fixation, penetration, degreasing, moisture absorption, perspiration and softness. There are still a lot of it. Due to the different division of labor, attention should be paid to the selection. The following is a brief overview of the considerations for selecting textile auxiliaries:
1. Technicians must master the basic knowledge of additives.
This is a prerequisite for the selection of additives. To use additives, you must have a basic understanding of the basic concept of additives, basic structure, performance and use characteristics. If abnormal conditions are found, the causes can be analyzed.
And deal with it in time. Therefore, when using new additives, each supplier must inform the supplier of the type of additive structure. For example, the softeners used are amino silicone oil softener, hydroxyl silicone oil softener, fatty amide softener and imidazoline. Application factory should know which softener and fatty acid paraffin softener. In this way, we can master its basic performance and prevent blind use.
2. Pay attention to the effect of textile auxiliaries and avoid numerical traps
There are many brands of textile auxiliaries in the market, so the effect of each brand is not the same. However, most manufacturers think that the effective content of additives is the standard of the effect of additives, ignoring the impact of products on the fabric itself, which leads to the loss of production is very incorrect. After understanding the situation of the products, it is reasonable to choose textile auxiliaries.
3. The acid and alkali resistance of additives must be determined
This makes it easy to understand whether the additive can meet the needs of the process. The acid and alkali resistance of the additive is very poor. Anionic surfactants are usually resistant to alkali and acid. Phosphate has the best alkali resistance, while carboxylic acid has the worst acid resistance. Cationic surfactants are usually resistant to acid and alkali. Nonionic surfactants are resistant to weak base and weak acid, but not to strong acid and strong base. Printing and dyeing factories must first test whether the auxiliaries used in the process will be turbid or precipitated according to the process requirements. One factory uses imported auxiliary equipment for crawling and bleaching. There is no problem at the beginning, and then there are continuous wrinkles. How to choose textile auxiliaries? Note: there are irregular color spots on the surface of dyed fabric. When the box is opened, solid materials of different thickness are formed on the guide roller. The original precipitate is deposited by additives, which is not alkali resistant. When it sticks to the cloth, it will form color spots during dyeing. Therefore, the alkali resistance and acid resistance of additives must be determined. When
When the cold-rolled pile floats, more attention should be paid to this point. Many additives will be hydrolyzed in alkaline and acidic media. For the determination method, please refer to manual 6-017 and 6-018.
4。 Avoid subjective analysis and ignore the application of auxiliary equipment
In the experiential enterprise, the supervisor or host will use some auxiliary equipment and processes according to their own experience and refuse other products. This method is limited by its own knowledge and technology, and it is impossible to distinguish the advantages and disadvantages of additives and new additives. In addition to improving the quality of enterprise talents, it is also very important to pay more attention to the application of textile auxiliaries.