defoamer-antifoam

The magical effect of fumed silica in silicone rubber Fumed silica is one of the most important high-tech ultra-fine inorganic new materials. Due to its small particle size, it has a large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, thermal resistance, It has specific properties in terms of electrical resistance, etc. Its superior stability, reinforcement, thickening and thixotropic properties are unique in many disciplines and fields and have an irreplaceable role. Today, Xiaobian will work with you to learn how to apply fumed silica in silicone rubber. Application of fumed silica in high temperature vulcanization (HTV) silicone rubber The use of fumed silica can be divided into silicone materials and other fields, in which the amount of silica in the silicone material is nearly 60%, and the silicone rubber is the most used material in the silicone material. It can be added in an amount of up to 50% ...

Effect of fumed silica addition on tensile strength and hardness of RTV silicone rubber Fumed silica is a very effective reinforcing filler for RTV silicone rubber and can significantly increase its strength. This aspect is due to the small size effect of the fumed silica particles and the large specific surface area; on the other hand, because the surface contains many silicols, the particles can form a network structure through the interaction of hydrogen bonds and van der Waals forces, while silica The particles also interact strongly with the silicone molecules, improving interfacial adhesion. The smaller the particle size of fumed silica, the larger the specific surface area, the larger the contact surface between the particles and the rubber compound, and the more bonding points, the better the reinforcing performance for RTV silicone rubber, the tensile strength, tear strength and resistance of the vulcanized rubber. The abrasiveness and hardness are also high, but at the same...

Defoamer for industrial circulating water Industrial circulating water defoamer is a defoamer developed according to the characteristics of industrial circulating water foaming in the cooling water system. Industrial circulating water is also called cooling circulating water, and is mainly composed of a circulating pump, a control system, a check valve, and the like. However, when water treatment is carried out using industrial cycle machine technology, foam is easily generated due to agitation, entry of soluble gas, equipment, water quality, additives, and the like. If these foams are discharged without treatment, the impact on the ecological environment will be very large. Therefore, it is necessary to use industrial circulating water defoamer at this time. Industrial circulating water process      The industrial circulating water defoaming agent is a defoaming agent which is prepared by compounding a modified silicon polyether with a modified siloxane and us...

How to use defoamer for oil& gas? Do you know why should use defoamer in oil&gas production? In the petroleum industry, defoamer is necessary from the extraction and processing of crude oil. During the drilling process, a mud pump is used to hit the mud along the hollow of the drill pipe to the drill bit at the bottom of the drill pipe, and then The space between the drill pipe and the wall of the well is returned to the ground, and the cuttings that are drilled down are carried along with the return. After the cuttings have settled in the mud pool, they must be recycled for clean use. There are several main ways of foam generation during drilling: When natural gas overflows in the formation, foam is generated in the mud, and the surfactant in the mud has the function of stabilizing the foam, so that the foam generated by the mud is too late to burst and circulate to In the well; Too much surfactant; Foam generated from the gas generated by decomposition or fermentation...

Defoamer Test Method Defoamer testing methods are divided into dynamic defoaming and static defoaming tests. If your foaming environment is different, the recommended test methods are different. There are three main types of foam experiments to characterize the activity of defoamers. Persistence. As we have different experimental conditions in different laboratories and the experiments used in our research to obtain results from existing literature, we will introduce these experiments below. Other methods are sometimes used depending on the particular application. 1.Ross-Miles Foam Tester Features: Tested for strong foaming environments. This experiment is widely used for characterization (1) Foaming of surfactant solution (2) Research and application of foam stability in the presence of defoamer In the foaming system, the defoaming performance test was carried out by circulating bubbling by a Ross-Miles foam meter. In a 2000 mL measuring cylinder, a certain amount of foaming ...

Our Spring festival is coming in next week, Thanks for your supports, my friends, i hope you has great success in 2020! By the way: our office and factory will closed on next week, and will back to work on Feb, 03, 2020, However, you can contact me freely if anything, i will reply you whithin 24 hours. Below is my last shipment to Shanghai Port before our holiday! hashtag # antifoam hashtag # defoamer hashtag # invelychem https://www.ywlchemical.com/

What is pesticide additives and why should use defoamer for pesticide production? Pesticide additives are auxiliary substances added to the processing or use of pesticide preparations and used to improve the physical and chemical properties of pharmaceuticals, also known as pesticide adjuvants. The auxiliaries themselves are essentially free of biological activity, but can affect the control effect. With the wide use and development of pesticide additives, its variety is also increasing, so the choice of such additives has become the second biggest choice for farmers to choose pesticides. 1. Auxiliary agent to help disperse the original drug Filler and carrier A solid inert mineral, plant or synthetic material added to a solid pesticide formulation for the purpose of adjusting the finished product content or improving the physical state. The filler is used to dilute the original drug to increase the dispersibility of the original drug, and the carrier also has the function of a...

Why is there bubble in sewage treatment? What are the hazards of these bubbles? How to eliminate these bubbles? In the process of sewage treatment, I believe that everyone often encounters a large amount of foam in the biochemical pool, and if it is at rest, it will overflow from the pool, causing serious pollution of the external pool wall of the external equipment, which will deteriorate the operating conditions. Affected  the surrounding environment Type of foam in sewage treatment 1.    Initial bubble In the initial stage of aeration tank start, the sludge in the aeration tank is not suitable for the water quality of the sewage, and is not suitable for the growth environment, and foam is easily formed. As the sludge adapts to water quality, the foam will decrease. At the beginning of the aeration tank start-up, the sludge is relatively small, the sludge load is high, and foam is easily generated. After the amount of sludge increases, the foam will gradua...

High temperature overflow printing and dyeing defoamer Defoamer for textile can workable at over 100 ℃？ yes or no? Printing and dyeing process: Raw cloth preparation → Singeing → Refining → Bleaching → Setting → Satinization → Dyeing and printing →Finishing. Here will show INVELY-6200 which is workable over 100 ℃ with good performance. Desizing The main role of desizing: remove slurry as much as possible, creating favorable conditions for subsequent processing. Common alkali desizing principle: The slurry swells under the action of hot alkaline solution, from the gel state to the sol state, and becomes loose with the fiber, which is easy to wash off. Foaming occurs more during desizing, and the application of defoaming agents is mainly concerned with the pH and temperature of the foaming environment. INVELY-6200 is recommended when the temperature is higher than 90 ° C.  Dyeing According to the temperature can be divided into: normal temperature dyeing (room tempe...

D oes Silicone defoamer improve the performance of the slurry or increase the production risk? In the pulping process, in order to obtain white pulp, the chips are subjected to steaming, washing and bleaching processes (Fig. 1), but in this series of fiber processing, a large amount of water is consumed, and a large amount of foam is generated, so the selection is appropriate. Defoamers are critical. Figure 1 Wood chips, post-cooking slurry, slurry after washing, bleached slurry For many years, the paper industry has made many efforts to reduce energy, water and chemical consumption in order to achieve sustainable development. The use of silicone defoamers is one of them. The use efficiency of silicone defoamers can greatly enhance the sustainable development indicators of pulp and paper enterprises. Silicone is a kind of polymer material, in which polysiloxane is composed of silicon-oxygen bond as the skeleton, and the structure is shown in Fig. 2. It represents the infinite p...

In the production of wet-process phosphoric acid, when the content of carbonate and organic matter in the phosphate rock powder is high, a large amount of CO 2 gas is generated by chemical reaction with the acid. With the fierce progress of the acid hydrolysis process, CO 2 is continuously dispersed in the reaction liquid containing organic components, forming a stable foam layer on the surface of the slurry, and its volume can usually reach 5% to 10% of the volume of the reaction liquid. Production brings many adverse effects: first, it affects the dispersion and acid hydrolysis reaction of phosphate ore pulp, which reduces the production capacity; second, the foam layer not only reduces the equipment utilization rate, but also makes it difficult to observe the material level; third, it hinders the reaction process The evaporation of middle water and the removal of heat cause the reaction temperature of the extraction tank to rise. In severe cases, the foam will be taken to the ex...

What is paper tube glue defoamer and how to use defoamer in the paper tube glue correctly? The paper tuber adhesive i s commonly known as paper tube glue, paper tube glue, etc. It is a special adhesive for making various paper tubes, paper barrels, paper cans and related paper products. Paper, cloth, plastic film, metal foil and other thin soft materials, commonly used paper tube (paper tube) is wound into bundles to make a paper roll core-shaped finished product. These paper tubes are generally rolled and bonded by kraft paper or other raw paper, and the adhesive used is called paper tube glue. In the production of paper tube glue, PVA, vinyl acetate, polyacrylamide, ethylene glycol, etc. are added in the production. Most of these additives are surfactants, and foams are easily generated when mechanically stirred or subjected to shearing. The presence of foam can have a negative impact on the production process. If the foam is not properly controlled, it will seriously affect the o...

Influencing factors of slurry bubbling overflow in desulfurization absorption tower of 1000 MW unit Introduction Limestone-gypsum wet desulfurization is the most mature and common flue gas desulfurization method at present, and is widely used in 1000MW coal-fired units. With the continuous improvement of China's atmospheric emission standards, the implementation of the "Ultra-low emission reduction plan for coal-fired power plants" and the increasingly serious environmental problems, the safe and stable operation of the flue gas desulfurization system is particularly important, so the refined and professional management of the desulfurization system is also Future Trends. However, the problem of foaming and overflow of the desulfurization absorption tower slurry has become a thorny problem for its safe operation. The foaming of the slurry often causes false liquid level, overflow of the absorption tower, pollution of the environment, increase of energy consumption, ...