(1) in different production processes, the usage of defoamer is also different, the construction methods are different, and the dosage is also different. When roller coating, air should be brought in and more bubbles should be added properly.<br>(2) compatibility. If the compatibility between defoamer and system is poor, turbidity, floating, even color change will occur, and the adhesion between layers will be affected.<br>(3) mix evenly before use. Because defoamer is a mixture of several different properties and functions, it is easy to layer.<br>(4) the influence of temperature. In the synthesis stage of the resin, high temperature defoamer should be selected, otherwise the defoamer will break the emulsion and lose the defoaming effect.<br>(5) the influence of pH value. In the strong acid and strong base system, if organosilicon defoamer is used, serious demulsification will occur.<br>(6) try to select products from large factories. Large factories have their own production centers and technical support, and the stability between batches is guaranteed.<br>(7) consider more negative effects.<br>
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