Even though UV curing technology has so many advantages, there are some unavoidable shortcomings. (1) The service life of UV mercury lamps is limited; (2) The energy consumption of UV mercury lamps is large, but the energy used effectively is not High, only about 20% of the input energy produces ultraviolet light, while 20% is visible energy and 40% is heat. From the spectrum of Figure 4, we can also see that in addition to the commonly used effective curing effect of 300~ In addition to the 400nm band, there are many other bands, in which the emitted infrared rays will increase the temperature of the substrate, which can better explain the reason why the conventional UV mercury lamp is not suitable for the heat sensitive material; Although UV mercury lamps are environmentally friendly and environmentally friendly due to the absence of VOC emissions, UV mercury lamps also have some hidden pollution, such as high pressure, high temperature and strong radiation of mercury lamps. It is easy to chemically react the surrounding oxygen molecules to produce ozone, which not only has an adverse effect on the atmosphere, but also has a greater impact on health.
In contrast to ordinary UV mercury lamps, the advantages of LED-UV are:
(1) Cold light source, no heat radiation, low temperature rise of the surface of the irradiated article, solve the long-term thermal damage problem in optical communication and liquid crystal production, and is especially suitable for applications where the temperature rise is small, such as liquid crystal edge sealing and film printing. The calorific value is small, which can solve the problem that the mercury lamp printing equipment has a large amount of heat and is unbearable for the staff. Moreover, the LED-UV light source emits high-purity single-band ultraviolet light with almost no infrared output, which is a cold light source, and the processed parts are not deformed by heat.
(2) High efficiency: The light energy of LED-UV is highly concentrated in an ultraviolet spectrum with effective curing effect. The actual effect is similar to that of a conventional high-pressure mercury lamp UV light source with a light intensity of 1000-2000 mW/cm2. , thereby shortening the curing time. Traditional mercury lamp UV light looks very bright, but the heat is very high, because its spectrum is very wide, the UV spectrum that actually plays an effective curing role only accounts for a part of the energy, and a considerable part is in the visible light segment. Light) and infrared spectroscopy (causing heat generation) are severely damaging to the operator's eyes and tend to thermally deform the machined workpiece.
(3) Long life: The service life of LED-UV lamps is more than 10 times that of traditional mercury lamps, and the service life is not affected by the number of switches.
(4) Instant switch, the maximum power UV output can be achieved without preheating, and it can be restarted instantly after turning off.
(5) High energy, stable light output, good uniform illumination effect, and improved production efficiency.
(6) The effective irradiation area can be customized, and the length is from 20mm to 1000mm.
(7) It does not contain mercury and does not produce ozone. It is a safer and more environmentally friendly alternative to traditional light source technology.
(8) Low energy consumption, only 10% of the traditional mercury lamp curing machine, which can save 90% of electricity.
(9) The maintenance cost is almost zero. The UV-LED curing equipment saves at least 10,000 yuan/set of consumables per year.
(10) Since the ultraviolet irradiation device and related supporting devices are very compact, it is not necessary to have a large mechanical installation space and pipeline construction in the past, and the setting is simple and easy. It can be said that the LED-UV curing system further enhances the environmental coordination of the conventional UV curing system. LED-UV technology is an upgrade of the original UV technology.
As a new technology, LED-UV light source has some problems at present. (1) Since the key technology of LED-UV is controlled by foreign countries, the current price of LED-UV lamps in China is relatively high; (2) Due to technical limitations, the current LED-UV lamp has a low light intensity, so that the curing speed is affected to some extent.
LED Linear Light is a kind of high-end flexible decorative lamp, advantages with low power consumption, long life, high brightness, easy to bend, maintenance free and so on.
It is especially suitable for indoor and outdoor entertainment places, building outline and billboard making.
According to different requirements, the product has 12V, 24V, 30CM,60CM, 90CM, 120CM and so on.Line lamps of different specifications can also be customized according to customer requirements.LED Linear Light
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Jilin Province Wanhe light Co.,Ltd , https://www.wanhelight.com