Defoamers for textile printing and dyeing are an important class of auxiliaries in textile processing. Next, Nanhui Defoamer Factory will briefly introduce the application and process of defoamer in textile printing and dyeing.
Textile Sizing Defoamer CQ-169/170/171
Textiles are exposed to various dyes and auxiliaries during processing. These auxiliaries, especially surfactants such as detergents, penetrants, emulsifiers and leveling agents, are prone to foam after being subjected to mechanical vibration. Foam is a dispersion of air in water or some liquids. During fabric processing, the contact surface between liquid and fabric will be reduced, resulting in uneven processing, which seriously affects production and product quality. To eliminate foam, measures such as static, heating or decompression can be used, but in order to quickly eliminate foam or avoid foam generation in each process of printing and dyeing, it is necessary to add defoamer for textile printing and dyeing.
Textile printing and dyeing industry
After the defoamer is added to the working fluid, it becomes a solution, emulsion or dispersion, which is adsorbed on the surface of the bubble film. Because it has a lower surface tension than the foam film, it can attract and pull the surfactant or the foaming material, so that the surface viscosity of the foam liquid film is reduced, and it is locally thinned and broken. The defoamer for textile printing and dyeing of Nanhui Defoamer Factory has two properties: foam breaking and foam suppression. Some defoamers can only temporarily break foam, and lose their effect when dissolved in liquid. An ideal defoamer requires both Anti-foaming and defoaming effects, the solubility in water is small, and it is not easy to be emulsified and solubilized by the working fluid
Textile Defoamer
Defoamers can be used in each process. Weaving and sizing Generally, fabrics need sizing during weaving and finishing. According to different fiber varieties, the pulp is mainly starch, carboxymethyl cellulose, methyl cellulose polyvinyl alcohol, polyvinyl acetate, acrylate and sodium alginate. These macromolecular substances are prone to foam in the slurry, which affects the penetration and makes the sizing uneven. Weaving sizing requires low foam or no foam, and there is a lot of demand for defoamer, especially for chemical fiber and silk acrylate synthetic chemical slurry contains emulsifier and is easy to foam, and defoamer is generally added.
