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PU leather, also known as polyurethane leather, is one of the artificial leathers, and its main material is polyurethane. Because it looks and feels like real leather, it is often used in shoes, handbags, furniture and other fields.     The significant advantages of PU leather are as follows: 1. Economical: Because of its relatively low production cost, the selling price is lower than that of real leather. 2. Wear resistance: It has excellent wear resistance and is suitable for daily use. 3. Easy to clean: The surface is smooth and easy to clean, just wipe it with a damp cloth. 4. Diverse designs: It provides a variety of colors and textures to meet the needs of various consumers. 5. Environmentally friendly characteristics: Modern manufacturing technology makes PU leather have less impact on the environment.   However, PU leather may foam during processing, and the reasons include: 1. Poor quality of raw materials: The use of inferior or impure polyurethane materials may cause gas release and generate bubbles. 2. Uneven mixing: During the batching process, if the ingredients are not fully mixed or the mixing time is insufficient, bubbles are likely to occur. 3. Exothermic reaction: If the exothermic reaction during the curing process of polyurethane is not handled properly, the temperature rise may also lead to gas release and bubble formation. 4. Excessive humidity: The humidity in the production environment is high, and water penetrates into the material and evaporates, forming bubbles. 5. Improper use of adhesives: Adhesives with strong volatility or incomplete drying may also cause bubble formation during the curing process.   The role of defoamers in PU leather is as follows: 1. Prevent bubble generation: Defoamers can effectively reduce the surface tension of liquids and reduce bubble formation. 2. Improve product quality: Defoamers help improve the appearance and stability of PU leather and reduce defects. 3. Improve production efficiency: Defoamers accelerate the production process, avoid stagnation due to bubble problems, and improve efficiency. 4. Wide applicability: Defoamers are suitable for all walks of life, such as coatings, inks and glues, to improve product performance.

Defoamers are an important component of the chemical industry. Although not well known to the general public, they play a key role in various production processes. Through this article, we will take you on a mysterious journey into the world of chemistry and unveil the mystery of defoamers.   Part I: What are defoamers? Defoamers are chemicals whose main function is to prevent or reduce the formation of bubbles in liquids, thereby reducing the generation of foam. Foam is composed of tiny bubbles of gas in the liquid, which rise in the liquid and gather on the surface to form foam. The presence of defoamers can destroy these bubbles and make them more easily dissipated in the liquid, thereby reducing or eliminating the generation of foam. Defoamers are usually a type of surfactant. They form a molecular film on the surface of the liquid, which can destroy bubbles and prevent them from aggregating. These surfactant molecules usually have hydrophilic and hydrophobic parts, which enable them to interact with liquids and gases at the same time, thereby effectively controlling the formation of foam.   Part II: How Defoamers Work？ The working principle of defoamers can be divided into two key steps: adsorption and diffusion.   Adsorption: Defoamers first adsorb on the surface of the liquid. These molecules are arranged in a special way so that their hydrophilic parts interact with the liquid and their hydrophobic parts interact with the gas. This arrangement forms a thin film, called a molecular membrane, on the surface of the liquid. The presence of this film destroys the surface tension of the bubbles, making them easier to break.   Diffusion: Once the molecular membrane is formed, the defoamer begins to diffuse to the surface of the bubbles. They break down the structure of the bubbles by penetrating into the interior of the bubbles, breaking them up and releasing the gas. This causes the bubbles to break and dissipate quickly, reducing or eliminating the generation of foam.   The working principle of defoamers is quite complex, and they need to be adjusted under different liquid and gas conditions to achieve the best effect. This versatile property makes defoamers indispensable in various industrial and scientific applications.   Part III: Defoamers are widely used in various industries, including chemicals, pharmaceuticals, food processing, oilfield extraction, printing and coatings. Chemical Industry: Many production processes produce a large number of bubbles and foam, which may cause equipment failure or product quality degradation. Defoamers are widely used in these processes, such as in dissolving, mixing, stirring and filtering. Pharmaceutical Industry: The pharmaceutical industry requires strict production control to ensure the purity and stability of drugs. Defoamers can be used to control foam in the pharmaceutical manufacturing process to ensure high-quality pharmaceutical products. Food Processing: In food p...

Metal cutting fluid is a liquid used in metal processing to cool, lubricate and clean cutting tools and workpieces. It mainly has the following functions: 1. Cooling: Extend tool life by reducing the heat generated during cutting. 2. Lubrication: Improve cutting efficiency and improve surface quality by reducing friction. 3. Cleaning: It can wash away chips and impurities and keep the processing area clean. 4. Rust prevention: Form a protective film on the metal surface to prevent oxidation and corrosion.     Why does metal cutting fluid foam? 1. Physical factors: Agitation and shearing of bubbles. 2. Chemical composition: Some additives (such as surfactants) increase foaming. 3. Temperature changes: High temperatures may cause changes in liquid properties and accelerate foam formation. 4. Water content: Excessive water content promotes foam generation.   What harm does foam do to metal cutting fluid? 1. Reduced cooling effect: Foam hinders the contact between cutting fluid and tools and workpieces, thereby reducing the cooling effect and causing overheating. 2. Impact on lubrication effect: Foam reduces the lubrication ability of the liquid, increases friction, and causes severe tool wear. 3. Processing quality decline: Foam may leave marks on the processed surface, affecting the finish and dimensional accuracy of the product. 4. Equipment failure maintenance: Foam may cause obstruction of cutting fluid circulation, increase the pumping burden, and ultimately may cause equipment damage. 5. Reduced production efficiency: These factors will affect the overall processing efficiency and extend the production cycle.   Advantages of metal cutting fluid defoamers 1. Improve efficiency: Reducing foam can make the cutting fluid more effective. 2. Improve processing quality: Avoid the negative impact of foam on the processed surface. 3. Extend the life of the liquid: By controlling the foam, reduce liquid consumption and replacement frequency. 4. Economic benefits: Reduce production costs and improve resource utilization efficiency.

The problem of water-based coating foam is a problem of multiple factors and variables. It is necessary to comprehensively consider various factors to effectively control. Pain-based component: The lacquer component of water-based coatings has a direct impact on the production of foam. For example, acrylic latex coatings are more likely to produce foam due to their lactated particles thinner and difficult to eliminate.   Additives: Various additives, such as foaming agents, wetting agents, thickeners, etc., will affect the generation and elimination of foam. Choosing the appropriate additive and its dosage is the key to control the foam. Construction method: Different construction methods will cause different degrees of foam problems. For example, no air spraying is usually more likely to produce foam than air spraying, while flowing construction may produce more foam than impregnation construction.   Technical indicators: The technical indicators of coatings, such as pH, viscosity, etc., can also affect the production and stability of the foam.   Pains and fillers: Some organic pigments may increase foam due to their small particles. At the same time, some fillers, such as talc powder and silica, may also affect the foam.   The drying time of coating: The drying time of the coating film has a great impact on the choice of the foaming agent. For a short drying time, you need to choose a foam with stronger bubbles.   Applying method: Different coating methods also have different demands for foaming agents. For example, reverse roller coating is more difficult to bubble than roller coating.   On-site adjustment: In practical applications, many coating makers will flexibly add a foaming agent to ensure a successful trial according to the situation.    

In the production process of latex gloves, the generation of foam is a common and worrying problem.   Causes of foam generation: 1. Improper process operation: When latex raw materials are stirred and mixed, air is easily introduced to generate foam, especially under high-speed stirring. Such foam not only affects the appearance of the product, but also may cause the surface of the gloves to be rough and reduce the feel. 2. Chemical reaction: Some latex formulas can add foaming agents. These substances release gas under specific conditions, thereby promoting the formation of foam. This not only changes the physical properties of the gloves, but also affects its flexibility and durability. 3. Unstable temperature fluctuations: If the temperature of latex changes greatly during high-temperature curing, it may cause gas expansion and contraction to cause foam. This will make the appearance of foam more frequent. Impact of foam on production: 1. Reduce the texture and performance of gloves: Foam will make the surface of gloves rough, affecting the touch feeling and use effect. 2. Reduce production efficiency: The presence of foam requires extra time to deal with, which increases production costs and also increases the possibility of machine downtime. 3. Reduce the strength and durability of gloves: The holes formed by the foam may cause cracks or even damage to the gloves during use, thus affecting the safety of use. 4. Safety hazards: Excessive foam may interfere with the normal operation of the equipment and increase the probability of failure. The functions of defoaming agents for latex gloves: 1. Effectively destroy the foam structure: Defoaming agents can quickly penetrate into the foam, reduce surface tension, and thus destroy the stability of the foam. 2. Reduce foam generation: By adjusting the formula and process, defoaming agents can effectively prevent the generation of foam and ensure a smooth production process. 3. Improve production efficiency: The use of defoaming agents can shorten processing time and improve the work efficiency of the production line. 4. Ensure product quality: Controlling the generation of foam helps to ensure the consistency and excellent performance of latex gloves. 5. Extend product life: Defoaming agents can enhance product durability and reduce defects caused by foam, thereby extending the use cycle of gloves.

In the picture of modern agriculture, every drop of herbicide carries farmers’ expectations for a bumper harvest. However, during the use of herbicides, the foam problem is like an impossible threshold, affecting the effectiveness of the herbicide. Today, let’s unravel the mystery of eliminating foam in herbicide defoamer.     When spraying herbicides, foam formation is almost inevitable due to agitation, pressure, or the effects of surfactants. These foams not only reduce the contact area of ​​the active ingredients and reduce weeding efficiency, they may also cause a waste of chemical liquid and even cause additional burdens on the environment.   Herbicide defoaming agents can quickly defoam by reducing the liquid tension and destroying the stable structure of the foam. Adding an appropriate amount of defoaming agent to the herbicide can significantly reduce foam generation, ensure uniform liquid distribution, and improve the weeding effect. What's more, modern herbicide defoamers adopt environmentally friendly formulas, which are harmless to the human body and more friendly to the environment.   When selecting a herbicide defoamer, comprehensive consideration should be given to its compatibility with the herbicide ingredients and its defoaming performance. Make sure the herbicide is fully compatible with the defoamer and will not affect the herbicide's performance. In addition, when using, the amount of defoaming agent should be adjusted according to the foam situation to avoid using too much and affecting the performance of the herbicide.   In the world of herbicides, herbicide defoamers are solving the problems caused by foam with their unique charm, and making great contributions to protecting the environment and promoting sustainable development of agriculture. Let us look forward to the fact that with the continuous advancement of science and technology, herbicides and defoaming agents can bring more surprises and possibilities to our agriculture.