In the process of paper production, foam problem has always been one of the important factors affecting product quality. A large amount of foam will not only easily lead to pinholes, spots and other defects on the paper surface, but also reduce the uniformity and strength of the paper.

In the process of pulping, paper making and coating, it is easy to produce a large number of foam due to mechanical agitation, the use of chemical additives and the natural characteristics of fiber. After the foam breaks, pinholes, fish eyes or uneven spots will be formed on the paper surface. And the formation of foam will affect the binding force between fibers, resulting in the reduction of tensile strength and bursting strength of paper. Therefore, how to effectively control foam and improve paper quality is a major challenge for the paper industry.

The appearance and use of defoamers have greatly reduced the formation of foam. Defoamer molecules can quickly disperse on the foam surface, reduce the surface tension of the liquid, destroy its elasticity, and cause the foam to burst. Moreover, the new environment-friendly defoamer can exist in the slurry stably for a long time, and continuously inhibit the production of new foam.   

Although defoamers are niche additives, they play a key role in improving paper quality. Through scientific selection and application of defoamers, the paper industry can effectively reduce foam defects and improve product quality. In the future, with the advancement of technology, more efficient and environmentally friendly defoaming solutions will further promote the paper industry to move towards high-quality and sustainable development.