UV LED

by R.W. Stowe, director of applications engineering, Heraeus Noblelight America LLC Editor's Note: The following paper won the 2014 John Matteucci Technical Excellence Award for Web Coating at the Association of International Metallizers, Coaters and Laminators (AIMCAL) Web Coating & Handling Conference USA. Abstract Enthusiasm and rapid development are two … [Read more...] about Comparing Traditional UV Systems with UV-LED Systems for UV Curing

By Dr. Jo Ann Arceneaux, Allnex USA Inc. Introduction Oxygen inhibition is an age-old problem for coatings that cure via free-radical polymerization. Molecular oxygen can physically quench the triplet state of the photoinitiator/sensitizer, or it can scavenge the free radicals or active radical centers to produce unreactive peroxide radicals. The end results range from … [Read more...] about Mitigation of Oxygen Inhibition in UV-LED, UVA and Low-Intensity UV Cure

By R.W. Stowe, Director of Applications Engineering, Heraeus Noblelight America LLC Question: I plan to experiment with LEDs. Will I need a different radiometer from what I am using? Answer: Yes. Medium-pressure (MP) mercury lamps emit UV over a very wide region of the UV spectrum. There are few instruments that can capture the emitted energy over the entire UV … [Read more...] about UV QAs: LEDs and Radiometers; Non-Reciprocity and Design or QC; Radiachromic Films