Ultraviolet led generally refers to an LED with a luminous center wavelength below 400nm, but sometimes it is called near ultraviolet LED when the luminous wavelength is greater than 380nm, and it is called deep ultraviolet LED when it is less than 300nm. Due to the high sterilization effect of short-wavelength light, ultraviolet LED is often used to sterilize and deodorize refrigerators and household appliances.
In terms of products, Niya Chemical Industry listed the varieties with the emission center wavelength of 365nm-385nm, and nitride semiconductors listed the varieties with the emission center wavelength of 355nm-375nm.
Extended data:
Application of UV LED in photosensitive resin hardening application field
UV-curable resin is mainly composed of oligomer, crosslinking agent, diluent, photosensitizer and other specific additives. It uses ultraviolet light to irradiate polymer resin to make it cross-link and instantly cure. ?
Under the irradiation of UV light curing machine of UV LED, the curing time of UV curing resin does not need to be as long as 10 second at all, and 1.2 second can basically be cured, which is much faster than the traditional UV mercury lamp light curing machine. At the same time, the heat is better than that of ultraviolet mercury lamp. By mixing different components of ultraviolet curing resin, products meeting different requirements and uses can be made. ?
At present, UV-curable resin is mainly used for wood floor coating, plastic coating (such as PVC decorative board), photosensitive ink (such as plastic bag printing), electronic product coating (logo and circuit board printing), printing polishing (such as paper and playing card polishing), metal parts (such as motorcycle parts) coating, optical fiber coating, photoresist coating and precision parts coating.
Baidu encyclopedia-ultraviolet LED