Defoamer is a widely used, products are used in various industries, today we mainly to introduce the textile dyeing with defoamer use method.


First dilute 1:30 times with water and then add, add the amount of 0.1%-0.5%, appropriate amount of defoamer can effectively prevent and eliminate foam, do not use excessive. Before use should be properly stirred, and water or thickening water to add the desired defoamer diluted solution before use. The defoamer should be added before the foaming solution is foaming, which can more effectively prevent the formation of foam and eliminate foam.


There are oil-based and water-based defoamer, and different defoamer is used in different industries.


Applicable PH range of defoamer. The requirements of strong acid and strong alkali environment for defoamer are more stringent, which needs to explain the carrier environment with the defoamer manufacturer.


To consider the defoamer's long-term performance. Some defoamers start very well, and the effect is much worse after a period of time.


There are many factors affecting defoamer, there are at least two reasons:


1) Defoamer is enhanced by surfactant,


2) The main agent of defoamer can be absorbed by colloidal resin.


Defoaming ability under static conditions. When the bubbling liquid backflows into the storage tank or directly into the packaging bucket, it is also possible if the defoaming is fast.


Defoaming capacity of defoaming agent under dynamic conditions


1) Relatively closed small space dynamic defoaming effect. Because it involves gas entering the bubble, the external air pressure is reduced for a short time, which is more conducive to the generation and stability of the bubble. Wetting agents and emulsifiers have a shrinking effect on the gas in the bubble, and one is nothing, and hundreds of millions of them are considerable.


2) Open the dynamic defoaming effect, single flexo printing is transformed into a glazing machine without, the narrow space of the rubber roller and the ink roller is turned over at high speed, and the bubbles are generated very fast.


Machine suitability


1) Temperature. The change of temperature leads to the change of foam stabilization and defoaming of surfactant.


2) Customer habits.


In the factory defoamer how to pass the test, but once to the customer there is no, we are puzzled, after seeing the scene to understand, the original is the customer dilution larger. For the same dilution, the decrease of foam stability of emulsifier and wetting agent is inconsistent with the decrease of defoaming ability of defoaming agent.