Reflectors are very important elements of a UV curing system, as 60% of the rays that hit the substrate come from reflectors. The geometric shape and reflectance of the reflectors are major characteristics that ensure the performance of your application. Our reflectors are made up of an assembly of 70 thin layers of metal deposited under vacuum to optimise their reflection.
Depending on the thermal sensitivity of the substrates to be treated, UV systems are equipped with reflectors that absorb IR emissions or not. URS reflectors have ‘Cold Mirror’ technology because they will transmit a minimum of IR onto your substrate, whereas URS-A reflectors are optimised to transmit a maximum of heat as well as UV.
The URS cold-mirror reflector generation provides a significant increase in UV output on the substrate. Tests in offset, flexographic, screen and letterpress printing have shown that the URS reflector can achieve comparable curing results with reduced energy input.
URS technology can be applied to a wide range of reflector geometries. These geometries are specifically adapted to the respective production process. Another advantage of the URS system is the reduction of infrared radiation reaching the substrate. This enables the processing of temperature-sensitive materials.
Benefits
URS A reflectors were specifically developed for applications in which heat is transferred in a targeted manner to the coating or substrate to support the curing of inks and coatings.
Measurement results and practical tests show that energy input can be reduced compared with conventionally coated aluminium reflectors. This is due to an optimized reflectance in the UV range.
Design principle
The basis is a water- or air-cooled aluminium profile, which is vapour-deposited in a high vacuum with approx. 60 wafer-thin metal oxide layers. vapour-deposited. The aim is to maximise UV power to the substrate surface. The layer system allows a targeted addition of the infrared component of the radiation. Depending on the production process different reflector geometries are used.
Compared to URS, URS A reflector technology is characterised by an increased heat input onto the substrate.
