Defoaming agent commonly used silicone defoaming agent method
Defoaming agent commonly used silicone defoaming agent adding method, defoaming agent can eliminate foam, silicone defoaming agent is the most widely used in the production of various industries, is the most common one of the defoaming agent; However, even if it is commonly used defoaming agent, some customers in the process of adding, there will be a certain misunderstanding. Commonly used silicone defoamer adding method, detailed explanation
Today to tell you about silicone defoaming agent; When will it be added? What to note before adding! Silicone defoaming agent and non silicon defoaming agent difference? Uses and differences? Choose defoaming agent according to the following points?
Two conventional adding methods of silicone defoaming agent?
1. Add before foaming
In this method, foam production can be inhibited by adding antifoaming agent to the system which may produce foam beforehand. For closed containers and devices, defoaming agents are effective in removing foam.
Continuous drip into the add 2. When in the foaming liquid or circulation, or flow of cases, accompanied with the blister fluid circulating will consume defoaming agent, in this case, the method of using continuous drip into the defoaming agent, defoaming agent can effectively eliminate the effect of the bubble, if accompanied by metering pump can effectively control the adding, achieve the goal of economic use of defoaming agent.
Note before adding!
the emulsion needs to be thoroughly stirred before use. Because emulsion uneven will easily produce stratification, affect the use of defoaming agent effect.
try to use thickener to open dilute. Silicone defoaming agent can be used when dilution, but at the same time the stability of defoaming agent will therefore decline sharply, such as stratification, so it is recommended to use thickening agent to open dilute when dilution, if water open dilute, then please add water to the defoaming agent and slowly stir, open dilute on the same day that day.
Third, prevent frost and high temperature. Silicone defoaming agent is very sensitive to frost and high temperature and is vulnerable to damage. If the antifoam has been frozen, it must be carefully removed from frost and tested before use.
Fourth, pay attention to the storage of silicone defoaming agent. Long time of strong oscillation or strong shear (such as the use of mechanical pump, homogenizer, etc.) or stirring will destroy the stability of defoaming agent, so pay attention to the storage of silicone defoaming agent. Silicone defoaming agent and non silicon defoaming agent difference? Silicone defoaming agent is modified polysiloxane as the main component, with non-toxic food grade emulsifier, dispersant, stabilizer, refined by special process of biological inert defoaming agent.
Non-silicon defoaming agent is a kind of non-silicon defoaming agent of high carbon alcohol ether emulsion, which does not contain organic silicon completely. It is mainly produced by special process with hydrocarbon compounds, high carbon alcohols and esterified substances.
Uses and differences?
Non-silicon defoaming agent is mainly used in the paper industry and other can not use silicone defoaming agent industry.
Silicone defoaming agent is suitable for industrial circulating water, water treatment, circuit board cleaning, metal cutting fluid, metal cleaning, oil processing grinding fluid, alkaline cleaning fluid defoaming. Suitable for defoaming of textile, printing and dyeing, emulsion polymerization, civil washing, all kinds of color paste and low grade coating.
Choose defoaming agent according to the following points?
1. Insoluble or insoluble in foaming liquid;
2, the surface tension is lower than the foaming liquid;
3. There is a certain degree of affinity with foaming liquid;
4, no chemical reaction with foaming liquid;
5, small volatility, long action time.