HUMISEAL

Uva300

HumiSeal’s UVA 300 LED cured conformal coating is uniquely designed to be cured through simple, single wavelength LED UV light. The use of LED curing allows for simpler and more consistent curing, much lower energy consumption, reduced equipment maintenance costs, and no hazardous ozone or UVC exposure. UVA 300 provides superior protection and value for medium and high-volume PCB manufacturing applications. UVA 300 allows for short cycle times and maximum production speeds as it cures in seconds upon exposure to appropriate UV light. Its unique, dual cure chemistry eliminates the need for solvents and thinners, while the secondary moisture cure provides assurance of cure in hard to reach or shadow areas. UVA 300 can be sprayed using traditional automated spray equipment and fluoresces under UV light to allow for easy inspection.

Properties of UVA 300 include:

• LED curing mechanism with secondary moisture cure

• Superior flexibility, excellent thermal and mechanical shock resistance

• 100% solids, no solvents or thinners required, minimal environmental impact.

• ROHS 2011/65/EC compliant

• Superb adhesion to a wide range of commonly used solder resists

• Excellent insulation resistance and moisture insulation resistance

• Resistant to a wide range of solvents

Uv40led

UV40 LED coating is a one-part, high solids, dual-cure acrylate polyurethane conformal coating possessing LED cure capability. HumiSeal® UV40 LED has been developed with the following characteristics:

• Tack free cure with LED UV light at 385nm or 395nm as well as microwave light

• Application possible at elevated temperatures to give increased process stability

• Secondary cure mechanism that will fully cure any unexposed areas of the coating within 7 days at ambient conditions

• Fluoresce under UV light to allow coating inspection

• Excellent chemical and moisture resistance.

The material is also compliant with IPC-CC-830 testing, RoHS Directive 2015/863/EU and China standard GB30981-2020.

Uv550

This solvent free, UV curable elastomeric acrylate conformal coating displays higher flexibility compared to other UV curable conformal coatings. It was designed to withstand at least 1000 cycles of thermal shock in areas of high thickness between adjacent components. The SIR characteristics are stable for over 1000 hours. The material can be cured by LED or using an Arc or Microwave systems.

The product was specifically developed to have excellent flexibility with high moisture and electrical insulation properties. It also demonstrates high chemical resistance and is compliant with RoHS Directive EU 2015/863, China RoHS 2 and China Standard GB30981-2020.

Conclusions

To comply with the increasing environmental and technology trends, manufacturers must utilise new techniques and technologies. HumiSeal’s range of UV curing conformal coatings are easy to process, solvent-free and touch-dry in a matter of seconds. Full cure, in areas not exposed to UV radiation, will be achieved by reaction with moisture.

If you are considering the switch to a non-VOC conformal coating solution, align yourself with a supplier that not only understands the intricacies of chemical development but also understands perfectly how they align to electronic manufacturers’ needs.