Defoamers play a crucial role in the textile industry. They are widely used in many aspects such as pretreatment, dyeing, printing and finishing to effectively control the foam generated in the production process. The formation of foam mainly comes from the use of surfactants, mechanical agitation, air mixing and other factors. These foam not only affect production efficiency and product quality, but also may cause damage to equipment. The principle of textile defoamer is that it can quickly destroy the surface tension of foam, so that bubbles can quickly merge, break and dissipate.

Defoamer molecules can quickly diffuse to the surface of foam, reduce its surface tension, and make foam unstable and easy to burst. Some defoamers can penetrate into the foam wall, destroy the continuity and elasticity of foam film, and accelerate the rupture of foam. Some defoamers can indirectly promote the elimination of foam by increasing the viscosity of the liquid phase, slowing down the discharge rate of foam.