About the difference between three-proof paint and uv adhesive

In many industrial fields such as electronics manufacturing, automobile maintenance, aerospace, etc., conformal coatings and UV adhesives are two extremely important surface protective coatings, each of which plays an irreplaceable role. Although both have protection, bonding and other functions, there are great differences in practical applications. This article will delve into the differences between conformal coatings and UV adhesives.

As a veteran enterprise in the field of adhesives for the electronics industry, Schnees enjoys a good reputation in the industry with its self-developed conformal coating products and adhesive technology solutions. Now, we will use our technical experience to elaborate on the difference between conformal coating and UV adhesive for friends in the electronics industry, so as to help you better understand and use conformal coating and UV adhesive.

Conformal coating and UV adhesive Conformal coating, also known as electrical anti-adhesive or conformal adhesive, is a protective coating specially designed to protect electronic circuit boards and components from environmental influences. It not only effectively resists natural factors such as moisture, dust, mold, etc., but also extends the life and reliability of the product. According to the chemical composition, conformal coating can be divided into acrylic, silicone, polyurethane and other types; According to the curing method, it can be divided into solvent dissipation type, moisture curing type, heat curing type and UV moisture dual curing type. Different types of conformal coatings have their own characteristics in terms of performance and curing methods.

UV adhesives, also known as shadowless adhesives, photosensitive adhesives or UV curing adhesives, are adhesives that cure quickly when exposed to ultraviolet light. The curing time of UV adhesive is usually between a few seconds and tens of seconds, which greatly improves the production efficiency. UV adhesives have high strength and toughness after curing, and can withstand large tensile and shear forces on a variety of materials, so as to achieve reliable bonding. In addition, the UV adhesive solution is colorless and transparent, and the transparency is extremely high after curing, which will not affect the appearance of the object to be bonded.

The specific difference between conformalcoating and UV adhesive

Different curing methods In terms of curing methods, conformal coatings are diverse, while UV adhesives rely solely on ultraviolet irradiation; In terms of functional characteristics, conformal coating focuses on protecting against the impact of various environmental factors on circuit boards, while UV adhesive provides high transparency and other characteristics for packaging and bonding; The curing methods of conformal coating include solvent escape, moisture curing, heat curing and UV moisture dual curing. Different types of conformal coatings differ in curing speed and curing conditions. For example, solvent-dissipating conformal coatings have a long curing time and may release harmful volatile organic compounds (VOCs) during the curing process; Among them, UV moisture dual-curing conformal coating can form a strong and uniform protective film in a short time through ultraviolet irradiation curing and moisture curing.

And UV adhesive, as the name suggests, relies on ultraviolet irradiation for its curing method. Under UV irradiation, the photosensitizer in the UV adhesive is combined with the monomer, resulting in a rapid cure. The curing time of UV adhesive is usually very short, and the curing process can be completed in a few seconds to tens of seconds, which makes UV adhesive have obvious advantages in automated production lines.

2. Different action characteristics The conformal coating will form a tight protective film after curing, which has excellent insulation, moisture-proof, anti-leakage, shock-proof, dust-proof, anti-corrosion, anti-aging, corona resistance and other properties. It provides stable protection for circuit boards and electronic components, ensuring that electronic devices can function and perform in harsh environments.

The cured UV adhesive mainly provides high transparency, high strength, high weather resistance and excellent electrical properties, providing stable and safe packaging and bonding for electronic and other devices. At the same time, it does not leave obvious adhesive marks or residues after curing, which can maintain the aesthetics of the object to be bonded. In addition, the fast curing characteristics of UV adhesives can also optimize automated production lines and improve labor productivity.

3. Different application scenarios Conformal coating is widely used in electronic appliances, radio communications, aerospace and other fields. It is mainly used to protect the electronic components and circuits on the PCBA from moisture, corrosion, dust, mold, etc. from causing damage to the circuit. In harsh environments such as chemicals, vibration, high dust, salt spray, humidity and high temperatures, conformal coating can protect printed circuit boards from corrosion, deformation, mildew and other problems, and improve the reliability of circuits. In terms of application scenarios, conformal coating is mainly used to protect circuits, and UV adhesive is more used for fixing, bonding and encapsulating objects; In terms of construction and maintenance, the conformal coating construction method is flexible and the protective film can be repaired, and the UV adhesive application needs to be precisely controlled but difficult to remove after curing.

UV adhesive is mainly used for fixing, gluing and encapsulating objects. In the field of electronics, it is often used to fix electronic components, such as the packaging of LED lamp beads, the bonding of mobile phone screens, etc.; In the field of optics, it is used for bonding and sealing optical components such as lenses and optical fibers. For example, it can be used to fix IC chips, package LEDs, etc.; In the field of automobile manufacturing, it is used for sealing lamps and fixing interior trim parts.

4. Construction and maintenance The construction method of conformal coating is flexible and changeable, mainly including spraying, brushing, dipping, etc. A variety of methods such as spraying, brushing, dipping, and brushing can be selected according to specific needs. Spraying is suitable for quick coverage of large areas, brushing and brushing for details or where precise thickness control is required, and dipping for small or complex shapes of electronic components.

In terms of maintenance, the protective film formed after the curing of the conformal coating usually has a certain degree of repairability. If changes or repairs are required, they can be removed using specific solvents or mechanical methods (e.g., scraping, sanding) and then reapplied. In addition, regular inspection and recoating are also important measures to maintain the protective effect of conformal coatings.

The construction method of UV glue is relatively fixed, mainly relying on dispensing, dispensing, spraying or injection and other methods to accurately control the amount of glue. Due to the fast curing speed of UV adhesives, the amount and position of the adhesive need to be precisely controlled during application to avoid waste and unnecessary bonding. Dispensing and dispensing are suitable for bonding small or precise locations, and dispensing is suitable for large areas or where fast curing is required.

Once cured, UV adhesives have very high bond strength and are often difficult to remove by conventional methods (e.g., solvents, sanding). Therefore, UV adhesive is relatively difficult to maintain, and once the bonding is wrong or needs to be changed, it often needs to be removed by physical methods (such as cutting, prying), which may cause damage to the bonded object. Therefore, when using UV adhesive, special attention needs to be paid to the selection of construction accuracy and bonding position to avoid unnecessary maintenance difficulties.

To sum up, conformal coating and UV adhesive show obvious differences and respective advantages in terms of definition, characteristics, curing mechanism, application scenarios, construction and maintenance. In the development process of the future manufacturing industry, with the continuous improvement of product quality, production efficiency and environmental protection requirements, these two materials will continue to play an important role, and continue to innovate and optimize to meet more diverse market demand. Whether it's conformal coatings that pursue long-term protection and flexible application, or UV adhesives that focus on fast curing and high strength, they are indispensable and important elements in modern manufacturing.

By elaborating on the differences between conformal coatings and UV adhesives, including curing methods, action characteristics, application scenarios, and construction and maintenance, we can clearly see the characteristics and advantages of each. These differences show that both have irreplaceable value under different industrial needs, and they will continue to play a key role in the continuous development of the manufacturing industry and continue to improve to meet diverse needs.