Intertisation

Oxygen-reduced systems are another advanced form of UV curing. The UV systems are operated with nitrogen or carbon dioxide. Quartz glass screens are usually used to separate the UV lamp unit and the reaction chamber.

A UV unit run under oxygen-reduced conditions creates a much faster reaction, i.e. less energy is required at equal production speeds.

Applications for UV oxygen-reduced curing:

• PVC-floors
• Automotive parts
• Food packaging
• Fancy papers
• Foils, thermal papers, aluminium compounds and silicone application

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• Cost savings: Increased production speeds and the need for fewer lamps than in conventional curing result in lower energy costs, reduction in spare parts required (lamps and reflectors), shorter down-time of the unit as well as reduced space requirements. An additional benefit is a low thermal load on the substrate as oxygen-reduced operation achieves excellent curing results using less UV energy.
• Reduction in the photoinitiator content: Oxygen-reduced systems require less photoinitiators. These photoinitiators are partially responsible for undesired odour production and yellowing.
• Improved curing results: Oxygen-reduced curing achieves an exceptionallyhigh quality finish for both inks and varnishes, which may be chemical-resistant and scratch-proof.