In the process of textile printing and dyeing, bubbles produced by mechanical stirring and chemical reaction will hinder the contact between printing and dyeing auxiliaries and fibers, thus affecting the dyeing effect and product quality. Therefore, it is necessary to add defoamer to control the generation and rupture of bubbles in order to improve the printing and dyeing effect. The following introduces the types and functions of defoamers in some common textile printing and dyeing auxiliaries:

1. silicone oil defoamer

Silicone oil defoamer is a commonly used defoamer, which has good stability and temperature resistance and will not adversely affect the printing and dyeing effect. Silicone oil defoamer can be divided into water-soluble and oil-soluble, and the appropriate type can be selected according to the use requirements.

2. Polyether defoamer

Polyether defoamer has good dispersibility and permeability, which can effectively reduce surface tension and make bubbles burst. Polyether defoamer is also widely used in food, medicine and other fields, and can also be used in textile printing and dyeing.

3. Alkyl benzene sulfonic acid defoamer

Alkylbenzene sulfonic acid defoamer is a nonionic surfactant, which has good defoaming effect and dispersibility, and can effectively inhibit the formation and rupture of bubbles.

4. Fatty alcohol polyoxyethylene ether defoamer

Fatty alcohol polyoxyethylene ether defoamer is a commonly used nonionic surfactant, which is also widely used in textile printing and dyeing. This defoamer has good permeability and dispersibility, and can effectively control the generation and rupture of bubbles.

In a word, defoamer plays an important role in textile printing and dyeing auxiliaries. Different kinds of defoamers have their scope of application and methods of use in different printing and dyeing processes, so it is necessary to choose the appropriate defoamer according to the specific situation.