Application of defoamer in textile industry


The textile industry is one of the departments that use silicone oil to deactivate the largest dosage. In the 8 main processes of textile processing, namely, spinning, sizing, weaving, removing pulp, washing, dyeing, dyeing and finishing, there are 4 processes (sizing, wool washing, dyeing and finishing) requiring surfactant and other auxiliaries. For example, in the process of fabric dyeing, leveling and bleaching, penetrating agents are often added to the dyeing of dense fabrics to improve the dyeing uniformity, and penetrating agents are very easy to foam and cause stains, even waste products; moreover, in nylon printing, it is easy to produce "bubbles" and affect product quality. If silicone oil emulsion defoamer or octanol are added separately as defoamer, it can solve the problem of foam, improve levelling effect and stability of color paste. It should be pointed out that there are strict requirements on the quality of defoamers used in dyeing and finishing of fibre fabrics. If the stability of defoamer is not good, there may be oil stain or oil stain on the fabric, which will make the product downgrade or called waste product. Therefore, the properties of defoamer, bath formulation, acidity and alkalinity, finishing temperature and stirring condition should be carefully selected. For general fabrics, silicone oil emulsion defoamer is used. For polyester fabric dyeing at high temperature (above 130 C), self emulsifying modified silicone defoamer is used.


Self-defoaming agent net