As two important materials for PCBA printed circuit board assembly, triple-proof varnish and UV adhesive, each has different differences in the field of electronics. Let’s learn more about the differences between Triple Varnish and UV Adhesive today.
Difference in curing method
UV adhesive: UV adhesive, also known as photosensitive adhesive or ultraviolet light curing adhesive, is a kind of ultraviolet radiation can be quickly cured adhesive, UV adhesive curing time is usually between a few seconds to dozens of seconds, greatly improving the production efficiency. UV adhesive curing process does not need to be heated, reducing energy consumption and curing process and the release of no harmful volatiles.
Triple Proof Paint: Triple Proof Paint is a coating agent that cures by drying in air or by a chemical reaction. This type of curing allows the varnish to form a tough protective film that provides long term protection for electronic components.
Comparison of Physical Properties
UV adhesive: UV adhesive has high strength and toughness after curing, and can withstand large tensile and shear forces on a variety of materials to achieve reliable bonding. At the same time, UV glue is colourless and transparent, and after curing, it has a high degree of transparency, which will not affect the appearance of the bonded object.
Three-proof paint: three-proof paint cured to form a protective film usually has a certain degree of flexibility, can adapt to thermal expansion and contraction and vibration and other changes, to provide better electrical and mechanical protection for electronic components. In addition, three-proof paint also has good resistance to high and low temperatures, can maintain stable performance in extreme temperature conditions.
Different application scenarios
UV adhesive: UV adhesive is mainly used for fixing, bonding and encapsulating electronic components, such as fixing IC chips and encapsulating LEDs. Fast curing characteristics are conducive to automated production lines, improving labour productivity. Meanwhile, high strength and good transparency and weather resistance ensure the performance and appearance of electronic products.
Three-proof paint: Three-proof paint, on the other hand, is mainly used to protect electronic components and circuits on PCBA to prevent damage to circuits caused by moisture, corrosion, dust, mould and so on. In harsh environments such as chemical, vibration, high dust, salt spray, humidity and high temperature, three-proof paint can protect the printed circuit board from corrosion, deformation, mould and other problems, and improve the reliability of the circuit.
Construction and Maintenance Considerations
UV adhesive: UV adhesive construction is usually carried out by dispensing, dripping or spraying, etc. After coating, it needs to be cured quickly by UV irradiation. However, due to the nature of curing, it is difficult to repair or change the UV adhesive that has been coated, and physical removal is usually required.
Tri-proof paint: Tri-proof paint is more flexible and can be applied by spraying, brushing or dipping. At the same time, it is relatively easy to repair and change the three-proof paint, can be removed by solvent or mechanical, easy to repair and upgrade.
There are significant differences between the three-proof paint and UV adhesive in terms of curing method, physical properties, application scenarios, and construction and maintenance. Understanding these differences helps us make more informed decisions when selecting materials to meet the needs of different application scenarios. Whether it’s UV adhesives for fast curing and high-strength bonding, or three-proof paints for long-term protection and flexible construction, they both play an irreplaceable role in their respective fields.