Siliconisation - Oxygen-reduced UV curing

UV systems operating under oxygen-reduced conditions enable UV curing in a controlled atmosphere. The oxygen concentration in the reaction chamber is reduced by supplying nitrogen. The lower oxygen concentration can reduce oxygen inhibition during UV curing and thereby support the curing of inks, varnishes and coatings. Depending on the application, undesirable effects such as odor formation or yellowing can also be reduced.

The main features of these UV-units are as follows:

The UV-lamp housing is installed above the closed inerting chamber.
The UV-radiation directed towards the substrate passes a quartz screen located underneath the UV-lamp housing at the top side of the inerting chamber.
Heat management through water-cooled undershielding under the web.
Nitrogen inlet and outlet nozzles control the inert conditions. Nitrogen consumption is extremly low as only the nitrogen lost through inlet and outlet openings must be replenished.
The level of remaining oxygen is continually monitored to ensure optimum operating conditions.

Inerted UV unit to cross-link silicone release coatings

BLK version
Lamp output max. 200 W/cm
Stepless lamp control (ELC) relative to web speed
Residual oxygen content below 40 ppm
Quick-change quartz screens
Can be opened quickly for maintenance or web infeed
Stand-by mode to reduce nitrogen consumption

Siliconisation

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