How much knowledge do you have about the use of defoamer?
The choice of defoamer seems simple on the surface, but often simple things are not easy to pay attention to, thus affecting the final result. So, what are the considerations for the choice of defoamer, follow us to take a look!
At present, there is no defoamer in the world is omnipotent, there is no defoamer only a certain scope of application, so the choice of a good defoamer is the key to solving the defoaming problem.
Since emulsion defoamer is thermodynamically unstable systems, defoamers are somewhat affected by chemicals when added to foaming liquids or other aqueous systems.
The defoaming and foam inhibition effect of defoamer is generally proportional to the dosage, but there is a saturation point, that is, after reaching a certain concentration, and then add the dosage can not extend the foam inhibition time. Therefore, too much use is a waste, the appropriate concentration is to ensure that you meet the defoaming requirements of the key, but also the most economical use of defoamer chemical key.
The antifoaming and foam inhibiting effect of antifoaming agent is with the passage of time, gradually weakened until disappeared. But good antifoam agent foam suppression than poor antifoam agent to be much longer, so the evaluation of an antifoam agent is not only to look at the initial antifoaming ability, but also to look at the foam suppression time. Long foam inhibition time is the most difficult quality of defoamer, is the defoaming performance price ratio of the determining factors, good antifoamer is in this point far more than the poor antifoamer.
There is no relationship between the viscosity of an antifoam agent and its concentration. A highly concentrated defoamer may have a very low viscosity, while a highly viscous defoamer may have a very low concentration. But exactly low viscosity and high concentration defoamer is a high level in manufacturing process. Therefore, users should not judge the antifoaming agent simply from the appearance of viscosity, otherwise it is easy to draw wrong conclusions, thus affecting your production.
It is meaningless to compare the concentration of different varieties of defoamers from different manufacturers. A high concentration of defoamer may have poor foam inhibition, while a low concentration of defoamer may have superior anti-foaming performance.
The quality of defoamer should not only be judged by the comparative test of defoaming and anti-foaming performance, but also by the test of temperature resistance, acid and alkali resistance and compatibility balance for some specific industry products.
Although some customers have a variety of test methods and a wealth of experience in defoaming, but the production process should pay attention to our foaming liquid, detailed causes of foaming, temperature, PH value and other related information and requirements for defoaming, so that we can better choose defoamer to solve the problem.
