By H. Bilinsky, CEO, MicroTau Pty Ltd. I. Introduction Although drag-reducing riblet microstructures have been researched for over two decades and reliably demonstrate up to 10 percent reduction in skin friction1 attempts to apply them to aircraft as a fuel consumption reduction measure have not yet been fully successful. An economically viable implementation has so far been … [Read more...] about Microfabrication of Riblets for Drag Reduction: A Novel UV Approach Utilizing Photolithographic Methods
UV Curing
Q&A: Which is more important irradiance or exposure?
By R.W. Stowe, UV Applications Engineering Consultant, Heraeus Noblelight America LLC They are both important, but the relative effectiveness depends on the physical chemistry of an ink, coating, adhesive or paint - as well as on the optical thickness of the UV-curable material and the properties required of the end application. A higher flux rate, or irradiance, intitiates … [Read more...] about Q&A: Which is more important irradiance or exposure?
Floor Coatings with UV LED Curing: A Focus on Performance and Properties
By Gary Sigel, Ph.D., senior principal scientist, Armstrong Flooring Floor coating compositions were prepared from monofunctional, difunctional and trifunctional acrylates, as well as urethane acrylates (UA), and used to determine the effect of double-bond equivalent weight (DBEW) mercapto-based resin, high-viscosity UA and LED photoinitiators on final cured film properties … [Read more...] about Floor Coatings with UV LED Curing: A Focus on Performance and Properties
UV-Curable High Refractive Index Monomers and Oligomers for Optical Films
By Woogeun Kim, Yongjun Cho, Sungseo Cho, Won Bae and Paul Elias, Miwon Specialty Chemical Co. Ltd. Abstract The back light unit (BLU) is a core component of liquid crystal displays (LCDs) that are used in notebook computers, smartphones, navigation devices, flat screen TVs and public information display (PID) devices, among many others. To enhance the optical … [Read more...] about UV-Curable High Refractive Index Monomers and Oligomers for Optical Films
Q&A: How Can the Orientation of UV Lamps in a 3D Curing System be Described?
by R.W. Stowe, UV Applications Engineering Consultant, Heraeus Noblelight America LLC There is a useful language. Life in the UV curing world was easier when UV lamps only stretched across a web or flat conveyor, and all we had to worry about was width, number of rows and distance from the work. But, as we move into 3D processing of complex shaped objects, lamps are located … [Read more...] about Q&A: How Can the Orientation of UV Lamps in a 3D Curing System be Described?