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Three anti-paint
First, the product introduction
Three anti-paint is a specially formulated coating to protect the circuit board from the environment. Thereby extending the service life of electronic products, increasing the safety factor and ensuring the safety and reliability of product use. The increasingly widespread use of electronic products in daily life, combined with the use of three anti-paint common film allows manufacturers to effectively improve product quality, reduce the cost of expensive warranty period, the use of three anti-paint is also from the original high-tech field The printed circuit boards are slowly coming to the civilian and commercial sectors.
The three anti-paints have outstanding "moisture proof", "mold proof" and "anti-salt fog" properties, can produce transparent protective film on various printed circuit boards, good waterproof performance, in the humid environment, the paint film still does not lose Its good dielectric properties; strong oxidation resistance, thermal stability, anti-aging, can withstand a variety of different concentrations of acid, alkali, salt corrosion; can be cured at room temperature or low temperature, the film is dense and bright, Strong adhesion and decorative.
Second, the common three anti-paint types
Serial number |
Three paint types |
Benefits |
Disadvantages |
1 |
Acrylic based |
Good adhesion Transparent and clear The modulus of the material is wide easy to rework Good moisture resistance |
Highest working temperature poor wear resistance Low mechanical strength Limited anti-solvent effects usually contains solvents |
2 |
Polyurethanes |
Softer, cohesive General use Can fix Alkaline resistance |
Highest working temperature high solvent content Resistance is low |
3 |
silicone rubber (*UV) |
Low Tg High temperature performance low modulus moisturizing at room temperature Good moisture resistance |
Low cohesion may cause pollution poor wear resistance The effect of partial solvent resistance is poor |
4 |
modified acrylic + polyurethane |
Rapid Thermal Curing Fast UV curing solvent free, low VOC Good adhesion to solder mask Good interfacial wetting ability |
Most is two-component Short shelf life high price |
Third, the method of use
1, manual coating - brush / spray
No equipment investment is required, masking is required, efficiency is not high, and bubbles, corrugations, and thickness are not uniform.
2, dip coating
Not suitable for UV or two-component products, masking, simple operation, complete coating.
3. Mechanical coating - selective coating
High efficiency, large equipment investment, accurate and economical.
Fourth, the curing process
Serial number |
Curing method |
Action |
1 |
Room temperature curing |
1) Solvent evaporation and curing • Easy to use • commonly used in sprays • longer curing time 2) Moisture curing It can make the product cure more thoroughly, and it can also cure the product in the shadow part, usually silicone products |
2 |
Heat curing |
Promote deep curing of chemical cross-linking to increase productivity |
3 |
UV curing |
Fast curing, high efficiency with shadow phenomenon, equipment investment |
Five, the selection factor
Clear purpose: moisture-proof? anti-static? dust-proof? High and low temperature resistance? Can it be repaired?
Gluing method: manual? machine? Spraying? Dip coating?
Curing method: UV? Room temperature? heating?
Other: Coating hardness?
Coating thickness (standard: 0.025---0.21 mm)?
Sixth, application areas
Civil and commercial applications: washing machines, refrigerators, soya-bean milk machines, coffee machines, dishwashers, air conditioners, bathroom electronics, electric vehicles, induction cookers, charging piles, electric welding machines, etc.
Automotive Industry: Computer Control Systems, Automotive Electronics
Aerospace: satellite systems, military control systems, flight line control systems
Navigation sea: navigation system, radar control system
Electronics industry: LED display, solar energy, instrumentation, power supply, frequency converter, medical equipment, anti-theft fire alarm device
ABOUT US
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patented product
Having 32 Core Independent Intellectual Property Rights
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National High-tech Enterprises
Strong R&D and innovation capability
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ISO 9001 International System
China Quality Certification Accreditation Organization
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world top 500 Honorary customer
Gree, ZTE and Foxconn