When discussing energy-efficient coil coating processes, the conversation often focuses on replacing conventional thermal ovens. However, the transformation goes far beyond that. UV and electron beam (EB) technologies do not simply accelerate curing – they fundamentally change how coil coating lines are designed, operated and optimized.

At the center of this transformation is curing technology itself.

Unlike conventional thermal drying processes, UV curing relies on a completely different chemical mechanism. Coatings are cured within seconds or even fractions of a second.

This shift directly impacts key process parameters, including:

• Production speed
• Energy consumption
• Line footprint
• Plant layout
• Process efficiency

As a result, curing is no longer just another process step. It becomes a defining parameter for the entire production system.

With more than 45 years of experience in UV technology, IST METZ brings extensive expertise to this field. The company develops and manufactures UV systems for industrial applications worldwide, supporting demanding processes in printing, automotive and industrial coating environments.

Applying this expertise to coil coating creates significant opportunities for more energy-efficient production while addressing the specific requirements of continuous coating lines.

UV curing is based on a photochemical reaction rather than heat.

UV light is absorbed by photoinitiators within the coating. These molecules generate reactive species that initiate rapid polymerization of the coating material. The result is an extremely fast curing process that takes only seconds or fractions of a second.

This mechanism enables significantly more compact system designs compared to conventional thermal ovens.

The integration of UV technology into coil coating lines is always application-specific. Key design parameters include:

• Coil width

• Required production speed

• UV lamp power and spectral output

• Number and arrangement of UV modules

• Accessibility for operation and maintenance

Depending on the process, additional equipment such as inerting systems, lifting devices or crane systems may also be required.

Due to their compact design, UV systems can often be retrofitted into existing production lines, enabling higher line speeds without extending the overall plant footprint.

IST METZ has delivered UV solutions for several hundred applications worldwide, including:

• High-speed metal sheet printing

• Protective coatings for metal components

• Continuous industrial production environments

• Processes combined with PVD technologies

Laboratory systems, pilot installations and production-scale coil coating systems have also contributed valuable experience that continues to drive technology development.

Interest in UV technologys continues to grow throughout the coil coating industry. Key drivers include reduced energy consumption, lower CO₂ emissions and more compact production lines.

At the same time, industrial adoption depends on proven long-term performance, reliability and process stability.

Within the IONOMY ecosystem, IST METZ works closely with coating manufacturers and technology partners to ensure optimal interaction between:

• Coating formulations

• UV curing systems

• Process parameters

• Production equipment

This coordinated approach supports reliable implementation in industrial environments and helps accelerate the transition from testing to large-scale production.