What is UV LED Curing?
UV curing is a photopolymerization process that uses UV energy to change a liquid to a solid. Upon absorption of the UV energy, the photoinitiator (PI) produces free radicals which initiate cross-linking with binders (monomers and oligomers) in a polymerization reaction to cure or solidify the ink.
A light-emitting-diode (LED) is a semiconductor diode that emits light when an electric current is applied in the forward direction of the device, as in the simple LED circuit. The effect is a form of electroluminescence where incoherent and narrow-spectrum light is emitted from the p-n junction in a solid state material. An LED is usually a small area (less than 1mm -2mm) light source, often with optics added directly on top of the chip to shape its radiation pattern and assist in reflection. The color of the emitted light depends on the composition and condition of the semiconducting material used, and can be Infrared, visible or Ultraviolet.
What application markets does UV LED curing support?
UV LED curing products are currently used in production applications for ultraviolet curing of adhesives, coatings, and printing. In addition to adhesives, coatings, and printing, there are many other applications being discovered all the time.