Let's take a look at the characteristics of water-based acrylic emulsion! 1.Excellent adhesion The polymer structure of the aqueous acrylic emulsion contributes to the flow and wettability of the molecular chains on the surface of the substrate, making the coating and the substrate molecules in close contact to achieve high adhesion. 2.The high bearing capacity of the filler can significantly reduce the cost The water-based acrylic emulsion has excellent filling properties, and the total solid content of the coating formulation can reach 60%. Among them, the ratio of resin to filler can reach 1:2, which significantly reduces the formulation and use cost of water-based wood paint. 3.Zero VOC safety and environmental protection The water-based acrylic emulsion itself does not contain VOCs and can form a film at room temperature without film forming additives. Coatings formulated in this way can have a VOC content of zero. 4. Excellent water resistance Aqueous acrylic emulsions do not contain the surfactants used in ordinary acrylic emulsions, and have specially designed hydrophobic groups. Therefore, the water-based acrylic emulsion has excellent moisture resistance, which can prevent the penetration of water molecules on the substrate after the paint film is dried, and achieve the effect of waterproof and moisture-proof. 5.Excellent weather resistance The molecular structure of water-based acrylic emulsion adopts UV-stabilized monomer structure, and the emulsion is specially designed to make TIO2 fully and evenly dispersed in the emulsion, reduce the influence of UV on the emulsion, and effectively protect the substrate. 6.Excellent pigment dispersion Water-based acrylic emulsion and various water-based color paste compatibility is good, so that the function of fillers and pigments can be maximized, and the paint color is bright. Product Recommendation PF-135 High hardness modified acrylic copolymer Description PF-135 is a kind of modified acrylic copolymer with excellent adhesion to different substrate surfaces, anti-corrosion, abrasion resistant and high hardness etc. Type Modified acrylic copolymer Key Features l Transparent coating, dry fast l Hydrophobic coating, high hardness and gloss l Excellent adhesion, acid alkali and good abrasion resistant l Applied to concrete, rooftop, brick, stone, floor etc. Typical Properties Appearance pH Solid content Hardness Cover area Duration Full dry time Application l Cement concrete surface l Ceramic tile, floor l Road surface l Metal, plastic, wood surface etc. Storage and Handling l Available in 200 kg/ barrel or 25 kg/ barrel l Store products in tightly closed original containers at 5-40℃ l Shelf life: 9 months from delivery date l According to non-dangerous goods transport

Advantages and disadvantages of the same type of defoamer Organic defoamer such as mineral oils, amides, low alcohols, fatty acids, fatty acid esters and phosphate esters has been studied and applied earlier, belonging to the first generation of defoamer, which has the advantages of easy access to raw materials, high environmental performance and low production cost.The disadvantages are low defoaming efficiency, strong specificity and harsh use conditions. Polyether defoamer is the second generation of defoamer, which mainly includes straight chain polyether, polyether with alcohol or ammonia as the starting agent and polyether derivatives with end group esterification.The biggest advantage of polyether defoamer is its strong anti-foam ability. In addition, some polyether defoamer has excellent properties such as high temperature resistance, strong acid and alkali resistance.The disadvantages are that the use conditions are limited by temperature, the use field is narrow, the defoaming ability is poor, and the bubble breaking rate is low. Silicone defoamer (the third generation of defoamer) has the advantages of strong defoamer performance, rapid defoamer ability, low volatility, no toxicity to the environment, no physiological inertia, wide range of use, etc., so it has broad application prospects and huge market potential, but the foam suppression performance is poor. Polyether modified polysiloxane defoamer has the advantages of polyether defoamer and silicone defoamer at the same time, which is the development direction of defoamer.Sometimes it can also be reused according to its reverse solubility, but at present, there are fewer types of such defoamer, which is still in the research and development stage, and the production cost is high. Selection of defoamer The selection of defoamer should meet the following points: 1.Insoluble or insoluble in the foaming liquid In order to burst the foam, the defoamer should be concentrated and concentrated on the bubble film. For the case of defoaming agent, it should be concentrated and concentrated in an instant, and for the case of defoaming agent, it should always be maintained in this state. Therefore, the defoamer is supersaturated in the foaming solution, and only insoluble or insoluble is easy to achieve supersaturation. Insoluble or insoluble, it is easy to gather at the gas-liquid interface, it is easy to concentrate on the bubble film, and it can play a role at a lower concentration. For the defoamer used in water systems, the molecules of the active ingredients must be strong hydrophobic and weak hydrophilic, and the HLB value should be in the range of 1.5-3 for the best effect. 2. The surface tension is lower than the foaming liquid Only when the intermolecular force of the defoamer is small and the surface tension is lower than that of the foaming solution, the defoamer particles can be immersed and expanded on the foam film. It is worth noting that the surface tension of the foaming solu...

The foam problem in water treatment has troubled many people, debuting the initial foam, surfactant foam, impact foam, peroxide foam, circulating water treatment with non-oxidizing fungicide generated foam, etc., so the use of defoamer in water treatment is more common, this article comprehensively introduces the principle, classification, selection and dosage of defoamer! Methods of foam elimination 1.Physical methods From a physical point of view, the methods to eliminate foam mainly include the placement of baffles or filters, mechanical agitation, static electricity, freezing, heating, steam, radiation irradiation, high-speed centrifugation, pressure and pressure reduction, high-frequency vibration, instantaneous discharge and ultrasonic (acoustic liquid control), etc. All these methods promote the gas transmission rate at both ends of the liquid film and the liquid discharge of the bubble film to different degrees. The stability factor of the foam is less than the attenuation factor, and the number of bubbles is gradually reduced. However, the common disadvantage of these methods is that the use of environmental factors is strong, the defoaming rate is not high, and the advantages are environmental protection and high reuse rate. 2.Chemical methods The methods of removing foam from the chemical point of view mainly include chemical reaction method and the method of adding defoamer. The chemical reaction method refers to the chemical reaction between the foaming agent and the foaming agent by adding some reagents to produce a substance that is insoluble in water, thereby reducing the concentration of surfactant in the liquid film and promoting the rupture of the foam, but this method has shortcomings such as the uncertainty of the composition of the foaming agent and the harm to the system equipment caused by insoluble substances. Nowadays, the most widely used defoaming method in all walks of life is the method of adding defoaming agent. The biggest advantage of this method is that it has high defoaming efficiency and easy to use, but finding a suitable and efficient defoaming agent is the key. Principles of defoamer Defoamer, also known as defoamer, has the following principles: 1. The local surface tension of the foam is reduced, resulting in the collapse of the foam The origin of this mechanism is that high alcohols or vegetable oils are sprinkled on the foam, and when they dissolve into the foam solution, the surface tension there is significantly reduced. Because these substances are generally less soluble to water, the reduction in surface tension is limited to local areas of the foam, while the surface tension around the foam hardly changes. The portion with reduced surface tension is strongly pulled around, extended, and finally ruptured. 2.Damage the membrane elasticity and cause the bubble to burst When the defoamer is added to the foam system, it diffuses to the gas-liquid interface, which makes it difficult for the surfactant wit...

With the development of the market economy, the demand for flexible packaging in various industries is also rising year by year. The development of flexible packaging materials and processing technology continue to improve, flexible packaging in many areas is playing an increasingly important role, so what are the composite ways of flexible packaging? This article briefly describes five composite methods of flexible packaging, and the content is for the reference of friends in the adhesive supply chain: Flexible packaging composite The "composite" in the flexible packaging industry is actually the meaning of "lamination", which is to make the film of different properties stick together in a certain way, and then seal it to protect the contents. Flexible packaging composite processing methods mainly include dry composite, wet composite, extrusion composite, co-extrusion composite and so on. Each compound way has advantages and disadvantages, comprehensive understanding to avoid bias! 01 Dry compound Among the various processing technologies of composite film, dry composite is the most traditional and widely used composite technology in China, which is suitable for complex varieties, small batches and a wide variety of packaging products. Widely used in food, medicine, cosmetics, daily necessities, light industrial products, chemicals, electronic products and other packaging. Dry composite is coated with a coating device (generally using gravure cable roller coating) on the plastic film coated with a layer of solvent-based adhesive, the solvent is removed by the recoating machine and dried, in the state of hot pressing and other substrate composite, such as film, aluminum foil adhesion into a composite film, the process is as shown in the following figure, because it is in the adhesive "dry" state (solvent-free state) composite. Hence the name dry compound. Dry composite is suitable for a variety of composite film substrate and film and aluminum foil, paper between the composite, a wide range of applications, excellent corrosion resistance to chemical media, such as food with alkali, acid, spicy, grease and other ingredients, cosmetics with water, flavor, emulsifier and other ingredients, chemicals with solvents, pesticides and other ingredients, widely used in the contents of the harsh conditions of packaging. With high composite strength, good stability and high product transparency, it can produce both high and mid-range composite films, and can also produce frozen, fresh-keeping or high-temperature sterilization composite films. Easy to use and flexible, simple operation, suitable for multi-variety, batch less production. However, the dry compound itself also has defects of poor safety and hygiene, environmental pollution and higher cost, and the development of alcohol-soluble and water-soluble adhesives has slowed down the pressure of solvent-based adhesives in terms of safety and hygiene, environmental pollution and cost to a certain extent. ...