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Spraying glue on the vibration tray can reduce its noise; applying a wear-resistant layer to its surface helps extend its service life, with polyurethane elastomers being the most commonly used material for such spraying. Generally, a layer of adhesive is sprayed or applied to the surface of stainless steel or steel vibration trays. A good PU adhesive for such vibration trays needs to possess properties such as strength, elasticity, flexibility, wear resistance, heat resistance, and solvent resistance. To improve the adhesion between the wear-resistant layer and the base surface, a spraying thickness of 30 microns is recommended. All surfaces must be clean and dry, free of moisture, dust, oil, grease, surface chemicals, and other contaminants. For stainless steel or steel surfaces, the surface needs to be polished, sandblasted, etc., to improve adhesion. Finally, the wear-resistant layer of the vibratory bowl is sprayed with polyurethane elastomer material. How to choose a high-quality, suitable wear-resistant adhesive? 1. Flexibility – The higher the strength and the greater the elongation, the better the flexibility. That is, the greater the ability to recover from stretching or bending. Under physical changes such as gravity or high temperatures, the coating on the surface of the vibration tray does not get damaged or broken, thus maintaining its original protective properties. 2. Adhesion – the strength of the bond between the coating and the substrate; this is a key factor in determining the quality of a product. The coating must adhere firmly to the substrate in order to exhibit its following three properties. 3. Elasticity – mainly refers to the ability to recover from deformation in the vertical direction. Excellent elasticity not only protects the protective equipment beneath the coating but also safeguards materials on the surface of the coating, such as those on a vibrating tray. 4. Appearance – Excellent thixotropic properties are an important factor for a smooth appearance. 5. Thixotropy – that is, the resistance to sagging, which is key to ensuring uniform coating thickness. The ability to apply it on elevations or surfaces with complex shapes is particularly important for small components. Especially at 90-degree angles, such as in the corners of vibrating trays, our products still ensure a uniform coating. Even coating is one of the most important prerequisites for ensuring the durability of a product. (1) The polyurethane elastomer material used for coating the surface of vibrating trays is widely applied, and its advantages include the excellent physical and chemical properties of polyurethane elastomer coating materials, such as tensile strength, elongation, flexibility, wear resistance, aging resistance, and corrosion resistance. The hardness can be adjusted, ranging from soft rubber (Shore A30) to hard elastomers (Shore D90), allowing it to meet various operational requirements. It has excellent corrosion resistance, capable of withstanding the erosion of acids, alkalis, oils, water, and other substances with a pH range of 3–11. Its anti-corrosive properties are outstanding. Excellent wear resistance: in submerged conditions, its wear resistance is 8 times that of cemented carbide steel, 7 times that of vulcanized rubber, and 3 times that of ultra-high molecular weight polyethylene. It features high resistance to salt spray corrosion and good freeze resistance, allowing for normal operation over a wide temperature range of -57°C to 93°C. Special models can withstand high temperatures up to 170°C. (II) Exceptional adhesion properties: Different primers and adhesives are used depending on the substrate, ensuring that there is a suitable primer and adhesive for all metal and non-metal substrates. (III) Easy construction: Simple to construct, can be carried out at room temperature, insensitive to humidity and temperature, and causes no pollution. Uses a complete set of equipment, making construction convenient and highly efficient ； The design thickness requirement can be achieved in a single construction phase. The series of spraying equipment meets the various requirements for the installation of different components. Cures at room temperature, without the need for a catalyst; can be sprayed and shaped on any curved, inclined, or vertical surface without sagging. It has a short gel time, with walking strength achieved within just a few dozen minutes. (IV) Eco-friendly coatings: two-component, 100% solid content, environmentally friendly, free of any volatile organic compounds (VOCS) and toxic volatile substances, and meet the food-grade standards of the United States and Europe. It can also be widely used in the food and pharmaceutical industries. (5) Aesthetic color: It can be made into products in various colors; therefore, it remains clean, has an attractive appearance, and does not fade over time. It has good prototype reproducibility; the coating is continuous and dense, with no seams or pores, offering an attractive and practical appearance as well as excellent UV protection. Under normal circumstances, compared to metal materials, polyurethane elastomer products have advantages such as light weight, resistance to wear and tear, low noise levels, lower processing costs, and corrosion resistance ； Compared to rubber, polyurethane elastomers have advantages such as wear resistance, cut resistance, tear resistance, high load-bearing capacity, castability, potting capability, transparency or semitransparency, ozone resistance, and a range of hardness levels ； Compared to plastics, polyurethane elastomers have advantages such as resistance to brittleness, elastic memory, and wear resistance. Polyester elastomers, as a new type of material with excellent properties such as wear resistance, corrosion resistance, impact resistance, tolerance to high and low temperatures, toughness, good elasticity, and ease of bending, hold great promise for wide-ranging applications.