Some key features of UV LED strip
UV spectral distribution, radiant intensity, radiant quantity and radiation density.
A: Spectral distribution
Spectral distribution is described that reach up to the wavelength distribution surface of the radiation energy. It is often used “nm” to express a relevant standard.
B:UV radiation intensity
Radiant intensity is the radiation power reach up to the surface area of the surface. Radiation intensity as per square centimeter of “watt” or “mwatt” units to expressed. It varies with the output power, efficiency of the led strip, Radiation intensity includes — all the factors related to power, efficiency, radiation output, reflectivity, the size and geometry of the led strip. Due to the absorption characteristics of the UV curable material, the light energy reach up to the surface above (below) is less than that of reach up to the surface. The curing conditions may be different in these regions. If the optical is too thick, it may reduce the light efficiency, it can cause the material of curing is not sufficient.
Three: UV LED strip’s radiant energy
The UV LED strip’s radiant energy Represents that the total amount of radiation energy photons reach the surface of the printing products unit area (while the radiation intensity say the arrival rate). In any given light source, the radiation energy and inversely proportional to the speed of curing . the radiation energy andtime of curing are inverse ratio.the radiation energy with an accumulation of Radiation intensity time.
With per square centimeter Joule or mJoule can represent the unit of radiation energy. (unfortunately, there is no An Conversion Information between the spectral content and the radiation intensity.) .In ink or coating, the higher the surface of the radiation intensity will provide a high light energy.The Radiation intensity Was Influence depth of cure rather than longer curing time. High degree of radiation allows the use of less light initiator. The photon density increases of the photon – Collision photo initiator, thereby compensating for the lower light initiator concentration. This thicker coating will be effective, because the surface of the photo-initiator absorbs and hinders the same wavelength light to reach deep initiator molecules.
Four: radiation density
Infrared radiation is mainly emitted the infrared energy by the UV light source out. Infrared energy and UV energy is collected and focused on the work surface together Layer.It decision to efficiency of the IR reflectivity and reflector. IR energy can be converted to a single bit of radiation energy or radiation intensity. But in usually, it is the surface temperature is the important part needs to pay attention. There are many techniques to solve the between IR and UV relationship. It can be reduction of the transmission andControl heat transfer. Emission reduction is achieved by reducing the flow of the current.