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The role of three anti-paints on PCB circuit boards
Circuit board factory xiaobian: PCB three-proof paint is a specially formulated paint, used to protect circuit boards and related equipment from environmental erosion. The three-proof paint has good resistance to high and low temperature; after curing, it forms a transparent protective film, which can protect against vibration, humidity, salt spray, humidity and high temperature, such as containing chemical substances (for example: fuel, coolant, etc.) The circuit is protected from damage. Under these conditions, the circuit board may be corroded, mold growth and short circuit, etc., with excellent insulation, moisture-proof, anti-leakage, dust-proof, anti-corrosion, anti-aging, anti-mold, anti-part loosening and insulation and corona resistance. .
Moisture is the most common and destructive main factor to PCB circuit boards. Excessive moisture will greatly reduce the insulation resistance between conductors, accelerate high-speed decomposition, reduce the Q value, and corrode the conductors. We often see the patina on the metal part of the PCB circuit board.
Coating the three-proof paint on the printed circuit board and components, when it may be affected by the unfavorable factors of the operating environment, it can reduce or eliminate the performance degradation of electronic products. If this three-proof paint can maintain its effect for a satisfactory period of time, such as longer than the product's service life, it can be deemed to have achieved its coating purpose.
three anti-paint ingredients
acrylic products
Acrylic tri-proof paint is flexible and can provide comprehensive protection. Because it is a one-component system, it has good adhesion, simple operation, low requirements for equipment and conditions, convenient construction, high transparency, high brightness, and short operation cycle. Therefore, they are easy to use and easy to remove. Some acrylic products meet military standards. They dries quickly without drying, and can be removed with matching organic solvents. Therefore, this type of circuit board tri-proof paint is one of the most versatile and effective products on the market.
Is the three-proof paint poisonous?
Whether the three-proof paint is toxic depends on the type of three-proof paint thinner and solvent used. If the three-proof paint uses toluene or xylene as the thinner, this chemical is harmful to the human body. small. Xylene is moderately toxic, irritating to the eyes and upper respiratory tract, and at high concentrations, it has anesthetic effect on the central system.
Although there are many environmentally friendly three-proof paints on the market now, in actual use, we still need to take protective measures and wear gas masks when using them.
