What factors affect the defoaming effect of defoamers?
Durability
1. Defoamers are compatible with surfactants. For example, defoamers are more effective at the beginning, but their effectiveness will be greatly reduced after a period of time.
2. The main agent of the defoamer can be absorbed by the resin particles.
The applicable pH range of defoamers: the use of defoamers in an environment with strong acids or bases is more stringent. At this time, the carrier environment needs to be explained to the defoamer manufacturer.
Applicability
1. The temperature at which the defoamer is used. Temperature changes can lead to changes in the foam stabilising and defoaming effects of the defoamer surfactant.
2. Customer habits
The defoamer passes all in-house tests when it is produced, but customers often complain about its poor performance. It is only after visiting the customer’s site that we can conclude that the customer has diluted it too much. At the same dilution level, the foam stability of the emulsifier and wetting agent decreases, while the defoaming ability of the defoamer decreases inconsistently. The defoamer is constantly diluted until it tends to produce more and more bubbles.
Packaging, storage and transportation
The defoamer can be stored for more than six months at a temperature of about 25°C. The defoamer should be stored away from light and out of direct sunlight. The defoamer is usually packaged in 25 kg or 50 kg plastic drums; 120 kg plastic-lined metal drums or according to customer requirements.
The main ingredients of water-based defoamers are dimethyl silicone oil, silica, emulsifiers, etc. Emulsification technology is used to disperse these raw materials into an emulsion-like defoamer. These raw materials are non-toxic and disperse quickly. When used, they quickly defoam, have a long inhibition period, and are stable without stratification.
Water-based defoamers have a very good defoaming effect on polyvinyl chloride resins, textile printing and dyeing, petrochemicals, metalworking fluids, biological fermentation, water treatment, pharmaceuticals, and food fermentation industries. In addition, during the discharge of sewage from factories, if there is too much foam in the water, it cannot pass the inspection and the discharge standards cannot be met. As a result, the sewage cannot be discharged, slowing down production. Therefore, at this time, the defoamer used for sewage treatment plays a crucial role. After the sewage is treated with a defoamer to achieve the discharge effect, it can be discharged normally.
Defoamers can quickly defoam during sewage treatment, have a long bubble suppression period, disperse quickly in water, blend well with the liquid and are not easily emulsified or oiled. They therefore provide great help for environmental protection.
How to use defoamers
1. The dosage varies according to the foaming system and needs to be determined through trial and error. Generally, the ratio is 0.1% to 0.01%.
2. Add the defoamer directly to the medium to be used or dilute it with an appropriate amount of water before use.
