In the ancient and constantly innovative industry of papermaking, every technological advancement drives a dual leap in production efficiency and product quality. Among them, defoamers, as a key additive in the papermaking process, cannot be ignored in their importance.

In the papermaking process, due to the addition of various chemical additives (such as fillers, sizing agents, dyes, etc.), mechanical mixing, pumping and other operations, it is easy to produce a large number of foam. These foam not only affect the uniformity and fluidity of the pulp, but also may lead to problems such as paper machine breakage, paper surface defects (such as spots, holes), and even affect the stable operation of the paper machine in serious cases, increasing downtime and maintenance costs.

Defoamer is a substance that can effectively reduce the surface tension of liquid. It can rapidly diffuse to the surface of foam and destroy its stability, so that foam can quickly burst and inhibit the generation of new foam. The commonly used defoamers in the paper industry mainly include organosilicon, polyether, mineral oil, etc. They each have their own characteristics and are suitable for different paper making processes and paper types.

Organosilicon defoamers have efficient and long-lasting defoaming properties, suitable for high-speed paper machines, and can effectively reduce downtime. Polyether defoamers are easy to disperse and have little impact on pulp systems, making them suitable for situations where the original properties of pulp need to be maintained. Mineral oil defoamers are low-cost, but attention should be paid to their potential impact on the environment, and they are suitable for situations with high cost requirements.

Choosing the appropriate defoamer requires consideration of various factors such as pulp composition, process conditions, paper quality requirements, and environmental protection requirements. The correct usage method includes appropriate addition, uniform dispersion, and adjusting the addition amount according to the actual production situation to achieve the best defoaming effect.

With the increasingly strict environmental regulations, the development of low VOC (volatile organic compounds) and biodegradable defoamers has become an industry trend. At the same time, the application of intelligent production technology will also promote precise control of the use of defoamers, further improving the green production level of the paper industry.

In a word, defoamer in paper industry is not only an effective means to solve the foam problem, but also a key element to improve production efficiency, ensure product quality and promote sustainable development of the industry. In the future, with the continuous advancement of technology and the improvement of environmental protection requirements, the application of defoamers will be more efficient and environmentally friendly, injecting new vitality into the development of the paper industry.