3w high power led uva 365nm
Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights.
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UV curing (ultraviolet curing) is the process by which ultraviolet light is used to initiate a photochemical reaction that generates a crosslinked network of polymers. UV curing is adaptable to printing, coating, decorating, stereolithography, and in the assembly of a variety of products and materials. In comparison to other technologies, curing with UV energy may be considered a low temperature process, a high speed process, and is a solventless process, as cure occurs via direct polymerization rather than by evaporation.
Application of UVLED light curing in printing industry
UVLED light curing has the advantages of long life, energy saving, instant use and environmental protection. At present, many printing presses are equipped with UVLED light source. With the implementation of the WTO mercury ban order,
More and more printing equipment will be modified or equipped with UVLED curing equipment. UVLED light curing will gradually replace the traditional mercury lamp in curing.
Comparison between UVLED curing and traditional UV curing
UV curing, namely UV curing, is the use of UV medium and short wave (300-800 nm) under UV radiation, the photoinitiators in liquid UV materials are stimulated to become free radicals or cations, so as to initiate the formation of active compounds
The process of polymerizing polymer materials (resins) with functional groups into insoluble and insoluble solid film. At present, UV curing mostly uses new UV LED lamp, traditional mercury lamp and halogen lamp are gradually being eliminated.
Why can UV LED curing technology develop rapidly and gradually replace the traditional UV curing? There are mainly the following points.
1. UV LED has a long life, more than 10 times of the traditional mercury lamp, which can save the replacement cost of equipment;
2. UV LED is a cold light source, no thermal effect, will not make the irradiated object surface temperature too high and affect the material, a wide range of applications
3. UV LED can be turned on and used immediately without preheating, and can be turned on and off at will, without the need to turn on and off normally in order not to affect the service life of the lamp as traditional UV curing, so as to save electric energy;
4. UV LED curing speed is fast, generally 1-2 seconds to end the curing process, which can greatly improve the production efficiency;
5. UV LED does not contain mercury and other harmful substances, which is environmentally friendly and meets the requirements of green environmental protection.
3w high power led uva 365nm samples are available for testing .
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