– 照射强度（mW / cm2）
– 紫外曝光（mJ / cm2）
E = I×T
E = UV曝光（mJ / cm 2）
I =强度（mW / cm 2）
UV is an electromagnetic wave of 100 to 380nm wavelength, longer than that of X-rays but shorter than that of visible rays.
UV is classified into three categories shown below according to its wavelength:
When UV is used to cure the resin, the following units are used to measure the amount of UV radiation:
– Irradiation intensity (mW/cm2)
Irradiation intensity per unit area
– UV exposure (mJ/ cm2)
Irradiation energy per unit area and total quantity of photons to reach the surface. Product of irradiation intensity and time.
– Relationship between UV exposure and irradiation intensity
E=I x T
E=UV exposure (mJ/cm2)
I =Intensity (mW/cm2)
T=Irradiation time (s)
Since UV exposure required for curing depends on the material, the required irradiation time can be obtained by using the above formula if you know the UV irradiation intensity.
UV Curing Technology is a technology of instant curing or drying in seconds in which ultraviolet is applied to resins such as coatings, adhesives, marking ink and photo-resists, etc., to cause photopolymerization. With polymerization reaction methods by heat-drying or mixing two liquids, it usually takes between a few seconds to several hours to dry a resin.
Specific grades of Master Bond’s UV curable adhesives feature scratch resistant properties.
Source: UV Curable Scratch Resistant Coatings
By Roland DGA UV Printers in Action To get a feel for how UV technology is revolutionizing pre-press and proofing, it helps to take a look at some real-world examples. These companies are currently putting advanced UV-LED printers to work … Continue reading →
Source: How UV-LED Inkjet Technology is Increasing Profits for Flexographic Printers – Part 2
by Doug Jones, Apex International UV inks are considered by many to be the most popular in the narrow-web space. And for good reason. Print results with UV inks are consistently better than those using water or solvent-based inks. But … Continue reading →
Source: 3 Tips to Prevent UV Ink Spitting
By Roland DGA Having the ability to quickly create a realistic package prototype that impresses a potential client with its detail and accuracy can make all the difference in the world when it comes to winning business in today’s competitive … Continue reading →
Source: How UV-LED Inkjet Technology is Increasing Profits for Flexographic Printers – Part 1
SpeedyTM LED Ink Testing System
DPL Part No. 80870.
LED curing technology offers many benefits over traditional Mercury UV curing, such as lower operating costs and No stand by time and No ozone exhaust risks, the only problem for LED curing is wavelength. Compared with mercury UV curing, LED curing system will provide much more energy at single wavelength, such as 365nm,395nm, but Mercury UV curing system provide a “curing area” from UVB to UVA, which is more suitable for current ink system. So it become more important to our clients test their LED ink before they decide to invest LED curing system for their printing or coating machine.
DPL SpeedyTM LED Ink testing system is specially designed for high speed LED ink test, speed from 2-300m/min.
LED Curing Area: 82x60mm or up to client’s request
Peak Wavelength: combination 365-385-395-410nm
Peak Energy Output: up to 26w/cm2
Speed control: automatic, from 2-300m/min
Control System: Integrated PLC
Power Control Range: 0-100% with instant on-off
Cooling System: closed loop water chilling with automatic flow control
DPL Industri A/S 01.11.2016
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