Do you need to dispense UV cure adhesives in an automated and repetitive way?
The use of UV adhesives, which cure by activation with UV light, shows a growing trend in the medical, electronic and glass bonding industries, due to excellent chemical structure and inherent properties.
The most common adhesives are one-component materials based on silicones, epoxies and acrylates, the latter being the preferred option because of faster curing, and they are used in applications such as sealing, coating, bonding, encapsulation, etc.
In applying these adhesives different dispensing solutions can be proposed based on the volume to be dispensed, the material supply format, the level of automation and the required cycle time. Among the various alternatives, standard pressure – time dispensing systems are highly effective and do not require special components, though it is necessary to take into account the following issues:
- Compatibility of the wetted parts with the material system to prevent material contamination or poor performance.
- Opacity of all components of the dispensing system (pipes, fittings, etc.) to protect from UV light.
In this context, we point out the use of AV801 valve. It is a needle valve with wetted part made of resin, which makes it suitable for anaerobic adhesives, UV and cianoacrilats, epoxy and silicone, among others.
- Minimum dispensing volume: 0,01 mL
- Flow rate: 1,3 L / min
- Viscosities: 1 – 300.000 mPa · s
- Wetted part: Polypropylene, polyacetal, PTFE, PCTFE
Figure 1. Image of AV801 valve.
Figure 2. AV801 valve drawing.