& nbsp; & nbsp; & nbsp; Three proof paint is a special formula of coating used to protect circuit boards and related equipment from environmental erosion. Three proof paint has good resistance to high and low temperatures; After curing, it forms a transparent protective film with superior insulation, moisture resistance, leakage resistance, shock resistance, dust resistance, corrosion resistance, aging resistance, corona resistance and other properties.
  & nbsp; & nbsp; & nbsp; Three proof paint has various names based on the requirements and emphasis of each region and manufacturer, such as three proof glue, moisture-proof glue, insulation glue, moisture-proof paint, protective paint, protective paint, covering glue, coating glue, waterproof glue, moisture-proof oil, three proof oil, three proof agent, protective agent, moisture-proof agent, conformal coating, conformal coating, conformal coating, and common coating. Three proof paint is a special formula of coating used to protect circuit boards and related equipment from environmental erosion, thereby improving and extending their service life, ensuring safety and reliability of use. Under realistic conditions such as chemical, vibration, high dust, salt spray, humidity, and high temperature, circuit boards may experience corrosion, softening, deformation, mold growth, and other issues, leading to circuit board failures. Three proof paint is applied to the surface of the circuit board to form a protective film that is resistant to moisture, salt spray, and mold. Circuit boards that have not been coated with three proof paint in conditions such as chemical substances (such as fuel, coolant, etc.), vibration, moisture, salt spray, humidity, and high temperature may be corroded, mold growth, and short circuits may occur, leading to circuit failures. The use of three proof paint can protect the circuit from damage, thereby improving the reliability of the circuit board, increasing its safety factor, and ensuring its service life. In addition, as the three proof paint can prevent leakage, it allows for higher power and closer printed board spacing. Thus, it can meet the goal of miniaturization of components.
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  & nbsp; & nbsp; The main types of three proof paint:
  & nbsp; & nbsp; Acrylic Three proof Paint
  & nbsp; & nbsp; It has fast surface drying and curing speed, high weather resistance, durability, and three proof properties, as well as strong hardness, good electrical performance, low price, transparent color, flexible texture, and easy repair characteristics. But it consumes a lot of diluent.
  & nbsp; & nbsp; Silicone Three proof Paint
  & nbsp; & nbsp; Good electrical performance, good chemical stability, soft elastic coating material, able to release pressure well, resistant to high temperature of 200 degrees, easy to repair. Silicone three proof paint has two types of products: solvent resistant and solvent removable. They have good chemical corrosion resistance and salt spray resistance under high temperature conditions. Although solvent resistant products can be welded, they are difficult to remove with organic solvents. Their biggest characteristic is that over time, chemical bonds become increasingly strong. To achieve performance, it can be thermally cured if necessary. Silicone products have significant electrical insulation properties, making them ideal products for high energy and high integration circuit boards. But the price is too high.
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  & nbsp; & nbsp; Epoxy resin based three proof paint
  & nbsp; & nbsp; Generally, two-component packaging is used, and it should be mixed evenly according to the ratio during use. The temperature of use has a significant impact on its viscosity, and its processability is not as convenient as single component three proof paint. It has high mechanical strength and good electrical performance.
  & nbsp; & nbsp; Polyurethane Three proof Paint
  & nbsp; & nbsp; Generally, two-component packaging is used, and it should be mixed evenly according to the ratio during use, with good moisture resistance and wear resistance. Has excellent solvent resistance. In addition to superior moisture resistance, it also has stable performance in low-temperature environments. However, the components of the three proof paint contain excessive free isocyanide, which has a strong odor and is harmful to health. The texture is relatively brittle.
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  & nbsp; & nbsp; Elastic polymer three proof paint
  & nbsp; & nbsp; The single component product has a simple operation process, good adhesion, elasticity after film formation, no stress, no free radicals generated after film curing, no corrosion of components, and a long-term sealing and insulation effect. The curing speed is fast under normal temperature conditions.
  & nbsp; & nbsp; UV curable acrylic resin three proof paint
  & nbsp; & nbsp; Using ultraviolet curing method, the three proof paint can dry in a few seconds to over ten seconds, with transparent color, hard texture, good chemical corrosion resistance and wear resistance. No solvents are required during the manufacturing process, and the three proof paint does not contain volatile organic compounds, which complies with safety and environmental regulations. Chemical and heat resistance, good flexibility, surface gloss, strong adhesion, and good coverage. Fast curing speed, high production efficiency, greatly reducing the manufacturing cost of the product.