In the paper industry, foam is a problem that cannot be ignored. It not only affects the stability of production, but also reduces the quality of paper. For this reason, defoamers for papermaking have emerged as a powerful assistant to ensure the normal operation of papermaking processes and the perfection of paper.

Papermaking defoamer is a new and efficient defoamer designed for the foaming characteristics of papermaking processes in the paper industry. Its performance characteristics are mainly reflected in the following aspects: firstly, it is non-toxic, odorless, and free of post pollution, ensuring the safety of the production environment and the environmental friendliness of the product; Second, it can effectively control the overflow of pulp and foam and improve the quality of paper making; Thirdly, it is widely used for defoaming in papermaking systems, as well as for defoaming in papermaking wastewater treatment, antifreeze, and distillation systems, with strong versatility.

In the papermaking process, foam mainly comes from many chemical additives added to the pulp pool during beating, such as filter aid, retention aid, wet strength agent, sizing agent, etc. These additives are prone to generating bubbles during the beating and closed cycle of white water, and the fibers and pigment fillers in the slurry provide carriers for the adsorption of bubbles. When there are many bubbles in the slurry, the bubbles are easy to merge and become larger, floating on the liquid surface to form liquid foam. These foam not only affect pulp dewatering, cause paper defects, reduce machine speed, increase energy consumption, but also may cause tripping and shutdown of the sizing pump, seriously affecting production efficiency and product quality.

Papermaking defoamer can quickly remove the fine bubbles entrained between fibers, eliminate the foam floating on the pulp surface, the air dissolved in the pulp, and eliminate the large bubbles on the water surface. It can avoid the formation of holes, reduce paper breakage, ensure the loss of fibers and wet end chemicals, make the paper have better uniformity, and improve paper quality. In addition, papermaking defoamers can improve the one-way retention rate of fillers, reduce the filler content in white water, and lower costs; Reduce the concentration and ash content of the slurry on the mesh, and extend the lifespan of the formed mesh; Improve the smoothness and opacity of the paper, making it easier to coat and print.

When using paper defoamers, the following points should be noted: firstly, the appropriate type of defoamer should be selected. Different types of defoamers have different performance characteristics and should be selected according to specific paper making processes and requirements; Secondly, it is necessary to control the amount of defoamer added. Excessive addition may lead to an increase in production costs, while insufficient addition may not achieve the expected defoaming effect; Third, fully mix the lotion to avoid layering and demulsification; Fourth, pay attention to the stability of lotion and avoid the influence of prolonged strong oscillation or shear on the stability of lotion.

In short, paper defoamers play a crucial role in the paper industry. It can not only eliminate the adverse effects of foam on papermaking process and paper quality, but also reduce production costs and improve production efficiency. With the continuous development of the paper industry, the application prospects of paper defoamers will be even broader.