A substance used as a defoamer must meet the following two conditions:

1. Antifoaming agent is incompatible with the system it is used in

2, defoamer has lower surface tension than the applied system,

Add a small amount of substance that can make the foam disappear quickly called defoamer, it can produce uneven surface tension in the foam system, and can break the surface viscosity and surface elasticity of the foam system. The defoamer can be evenly dispersed in the foam medium according to a certain particle size. Produce sustained and balanced defoaming capacity. When the foam medium is about to bubble for some reason, it stops the foam from forming in the first place. In systems where bubbles have been formed, they disperse rapidly, breaking the bubble's elastic membrane and causing it to burst.