Thermal Emission
Parallel configurations of high intensity emitters convert electrical energy into electromagnetic waves to provide rapid and uniform heating of moving substrates. A radiative infrared array focuses energy on the surface of a coating or ink layer, allowing for high speed drying without the need for large volumes of hot air. This direct transfer of energy is more efficient than convection because it targets the specific absorption bands of the water or solvent molecules.
Control Precision
Modular designs allow operators to activate specific zones across the width of the machine to compensate for moisture variations in the web. The radiative infrared array can respond almost instantly to changes in line speed, preventing the substrate from overheating during a slowdown or stop. Sensors located after the drying station provide the feedback needed to modulate the power output of the individual emitters.
This zoning capability ensures that the edges of the paper do not become brittle while the center remains at the correct moisture level.
Integration Advantage
Compact dimensions make these heating systems easier to install in existing production lines where space for traditional drying tunnels is limited. Since a radiative infrared array does not rely on physical contact, it is ideal for drying pressure sensitive adhesives or high gloss coatings that would otherwise mark or stick to rollers. The system can be tuned to different wavelengths to match the absorption characteristics of the specific polymer or pigment being used.
Modern units feature air cooling for the lamp housings to extend the service life of the emitters and protect the surrounding machinery from heat damage.
