In life, the huge scale of paper use always makes people think that the manufacture of paper is very simple. But in fact, there are many difficulties in the papermaking process. For example, the appearance of foam makes the papermaking process not go smoothly, and even affects the quality of subsequent finished products. Generally, in this situation, people in the industry tend to use defoamers to solve the foam problem in the process. What exactly is a defoamer for papermaking? Where can it be applied? Let's answer it below.
1. Definition
The defoamer for papermaking is developed and designed to solve the problem of foam in the paper-making process. It is mainly composed of special silicon polyether and chemical additives with good dispersibility. This chemical composition is stable, non-toxic and pollution-free. Negative impact. And it can play a role according to the defoaming needs of different links. On the basis of good defoaming and antifoaming performance, it will not produce adverse chemical reactions with other chemical additives, so that it will not change the color of the slurry and paper. It will not affect the performance and strength of the product, so it is widely used in all aspects of the paper industry.
2. Application
Defoamer for papermaking is mainly used in two links of papermaking process: pulp washing and papermaking.
In the pulp washing process, the foam prevents the process of bleaching, cleaning and conveying from being carried out smoothly, thus reducing the production efficiency. At this stage, the defoamer mainly plays the role of defoaming, eliminating foaming substances such as fatty acid soap in the slurry. It has excellent water solubility, can quickly disperse and evenly distribute in the slurry, so that it can quickly eliminate foam and reduce the number of foam, which has achieved the purpose of improving work efficiency.
In the papermaking process, the main function of the defoamer is to suppress the generation of foam. The generation of foam will greatly reduce the uniformity of paper forming, and cause problems such as pinholes and paper breaks. At this stage, the defoamer goes deep into the paper-making fibers, and forms an elastic film on the liquid surface by removing the fine foaming between the fibers and dissolving the air inside the slurry, so as to achieve the effect of long-term suppression of foam generation and improve the quality of the finished paper. beautiful.
