There are so many ways to choose defoamers!

As a member of the chemical industry, Xiaobian travels every day in various forums to learn about the latest industry consulting, paying special attention to the anti-foaming agent related posts, and finds that there are not a few such questions.

So Xiaobian collected the following points to learn with you:

1. At present, no defoamer in the world is omnipotent, and no defoamer has only a certain scope of application, so choosing a good defoamer is the key to solve the defoaming problem.

2. It is meaningless to compare the concentration of different kinds of defoamers from different manufacturers. High concentration defoamers may have poor antifoaming properties, while low concentration defoamers may have excellent antifoaming properties.

3. The defoaming and anti-foaming effects of defoamers are generally proportional to the dosage, but there is also a saturation point, that is, after reaching a certain concentration, adding dosage can not prolong the anti-foaming time. Therefore, excessive use is a waste, appropriate concentration is the key to ensure that you meet the defoaming requirements, but also the key to the most economical use of defoamers.

4. The defoaming and anti-foaming effect of defoamers decreases gradually with the passage of time until it disappears. But the anti-foaming ability of good defoamers is much longer than that of poor defoamers, so the evaluation of a defoamer depends not only on the initial defoaming ability, but also on the anti-foaming time. Long antifoaming time is the most difficult quality of defoamers and the determinant of the price-performance ratio of defoamers. It is in this respect that good defoamers far exceed poor defoamers.

5, since emulsion defoamers are unstable in thermodynamics, when defoamers are added to blister or other aqueous systems, chemicals will be affected.

6. There is no relationship between the viscosity and concentration of defoamer. High concentration defoamers may have very low viscosity, while high viscosity defoamers may have very low concentration. But it is precisely the low viscosity and high concentration defoamer that is a high level in the manufacturing process. Therefore, users can not simply judge the quality of defoamer from its apparent viscosity, otherwise it is easy to draw wrong conclusions, thus affecting your production.

7. The quality of defoamer should not only be judged by the comparative test of defoaming performance, but also be tested for the temperature resistance, acid-alkali resistance and compatibility balance of products in some specific industries.

8. Although some customers have various testing methods and abundant defoaming experience, we should pay attention to the relevant information of foaming fluid, detailed causes of foaming, temperature, PH value and requirements for defoaming in the production process, so that we can better choose defoaming agent to solve the problem.
--Reprinted from Sangjing Chemical Industry