The role of three-proof paint

The development of science and technology leads our lives, and the application of electronic equipment is highlighted in various fields such as household appliances, office equipment, automotive electronics and even aerospace, and conformal coating is the key to ensure the safe and stable operation of electronic equipment.

As a veteran enterprise in the field of adhesives for the electronic industry, Schnex has a good reputation in the industry with its self-developed conformal coating products and adhesive technology solutions. This article will deeply explore the role of conformal coating, and analyze and understand the role and application fields of conformal coating in detail for colleagues in the electronics industry.

The specific application examples of conformal coatings in different electronic devices are worth exploring. For example, in the field of automotive electronics, the interior environment of the car is complex, with large temperature fluctuations and factors such as vibration and dust. The use of conformal coating with anti-vibration, high and low temperature resistance and dustproof performance can effectively protect the automotive circuit board and ensure the stable operation of the automotive electronic system, such as the automotive engine control unit, in-vehicle entertainment system and other key components are inseparable from the protection of the conformal coating.

In the aerospace field, the space environment is extreme, with high radiation, vacuum, and rapid temperature changes, which place extremely high demands on electronic equipment. In this case, conformal coatings with anti-aging, chemical resistance, and high and low temperature resistance play a huge role. After the circuit board in aerospace equipment such as satellites and spacecraft is coated with conformal coating, it can resist the harsh space environment and ensure the normal operation of the equipment during long-term missions.

What is conformal coating? In the early days, most electronic equipment will be affected by moisture, dust, mold, these three types of substances, the coating coated on the circuit board is mainly to protect these three types of substances, so it is called "conformal paint", also known as conformal adhesive, electrical anti-adhesive, PCB conformal coating, etc.

With the increase in the application field of electronic equipment, the protective characteristics of conformal coating are more comprehensive, which can resist more environmental factors, such as chemical corrosion, vibration, high dust, salt spray, humidity and high temperature. According to the chemical composition, conformal coating materials can be divided into acrylate, silicone and polyurethane; According to different curing methods, it can also be divided into solvent-based curing, room temperature curing, thermal curing and UV curing and other conformal coatings. Looking at the field of consumer electronics, such as smartphones and tablets, these devices are often affected by the user's environment, and may be exposed to sweat (salt), dust, etc. Conformal coatings that are resistant to salt spray, dust and moisture can improve the durability of these devices, prevent failures caused by environmental factors, extend product life and enhance the user experience.

What are the three proofs of conformal coating? The principle of conformal coating is to isolate the damage of various harsh environments by forming a transparent protective film, reduce the corrosion, softening, deformation and other problems caused by it to the circuit board, improve the reliability and safety of the circuit board, and prolong the service life of electronic equipment.

The three proofs of conformal coating refer to moisture-proof, dust-proof and mildew-proof.

Moisture-proof Moisture-proof is to prevent humid air from eroding the circuit board and reduce the risk of corrosion and short circuit caused by moisture.

In humid environments, especially in southern regions, moisture can easily penetrate the inside of electronic devices, resulting in moisture corrosion, mold or short circuits and other failures of the circuit board. After the surface of the circuit board is coated with conformal coating, it can effectively isolate the direct contact between moisture and the circuit board by forming a tight protective film, and prevent the invasion of moisture on the circuit board. This not only protects the integrity of the circuit board, but also ensures the stable operation of the electronic equipment and improves the service life of the equipment.

Dustproof Dustproof refers to preventing dust, dirt and other small particles from adhering to the surface of the circuit board and affecting the performance of electronic equipment.

Dust and dirt are common sources of contamination in electronic devices, dust not only affects the appearance and cleanliness of the device, but is more likely to invade the inside of the device and cause damage to components, they not only affect the conductivity of the circuit board, but also can cause short circuits and failures. By forming a smooth protective film, the conformal coating can not only reduce the adhesion of dust, keep the circuit board clean, but also have good wear resistance, resist the damage caused by mechanical friction to the circuit board, and also protect the scratching of granular substances, greatly reducing equipment failures caused by dust and improving production efficiency.

Mold

Mold Prevention Mold prevention refers to preventing mold from growing on the surface of the circuit board, especially in a humid and temperature-friendly environment.

Mold is a common source of microbial contamination in life, and they can grow and multiply quickly in humid and temperature-friendly environments, as well as on the surface of circuit boards. The growth of mold not only leads to corrosion and degradation of the surface of the circuit board, but can also produce harmful metabolites that can have a serious impact on the performance of electronic devices. The protective film of the conformal coating creates a tight vacuum zone that prevents moisture and airborne contaminants from reaching the circuit board, inhibiting the conditions needed for mold growth. In addition, conformal coatings are temperature-resistant, allowing them to maintain their protective properties even in environments with large temperature changes and avoid the accumulation of condensate caused by temperature changes.

With the continuous improvement of the performance and demand of conformal coating, conformal coating is more than three-proof! In addition to the three main functions of moisture-proof, dust-proof and mildew-proof, conformal coating also has a variety of other additional functions, such as: anti-salt spray, anti-vibration, anti-chemical corrosion, high and low temperature resistance, anti-aging and anti-yellowing, etc., these additional functions make conformal coating widely used in more fields and more complex environments, providing more comprehensive and reliable protection for electronic equipment.

Although the functions of conformal coating are numerous, in practical applications, different materials of conformal coating should be selected according to different electronic equipment to achieve optimal protection.

When choosing a conformal coating, different curing methods should be considered. If you are looking for production efficiency, you can choose between fast-curing acrylic conformal coatings or UV-curing conformal coatings; For electronic equipment with temperature requirements, conformal coating curing at room temperature can be selected; For large-scale production, heat-curing conformal coatings can be considered, which has a fast curing speed and stable performance after curing.

In short, as a key material for the protection of electronic equipment, the importance of conformal coating cannot be ignored. As an innovative enterprise in the electronic adhesive industry, Schneiss will continue to devote itself to the research and development and innovation of conformal coating technology, provide more efficient, environmentally friendly and customized solutions for the electronics industry, help electronic equipment operate stably in a complex and changeable environment, and promote scientific and technological progress and industrial upgrading.

As you can see from these application examples, it is important to accurately select the right conformal coating according to the working environment and performance requirements of different electronic devices. Only in this way can the conformal coating give full play to its role and provide all-round and multi-level protection for electronic equipment, so as to ensure the stable and efficient operation of electronic equipment in their respective application scenarios, which further reflects the great significance of enterprises such as Schneills in the research and development and promotion of conformal coating technology.