Understanding [UV curing] will be a great help in daily work. The physical properties of UV-cured materials are substantially affected by the drying system used to cure them. The desired performance, whether of protective adhesives, inks, or adhesives, will depend on the parameters, design, and control methods of these lamps.
The parameters of the four hubs of the UV lamp are:
1.UV irradiance (or density)
2. Spectral distribution (wavelength)
3. Radiation (or UV energy)
4. Infrared radiation. Inks and protective adhesives will exhibit very different properties relative to the maximum irradiance or amount of radiation, as well as different UV spectra. The ability to identify different UV lamp properties and match them to the optical properties of curable materials expands the scope of UV curing as a fast and efficient production process. There are many curing systems whose optical and physical properties (in addition to its own composition) affect the curing effect, resulting in differences in the appearance characteristics of UV curing materials.
The properties of the curable material, and the efficiency of a UV lamp, depend on how easy it is to emit photons into the curable material to initiate light-triggered molecules. UV curing is determined by photon-molecule collisions. Light triggers molecules to spread evenly through the material, but photons are different. In addition to the characteristics of the UV light source, the cured film also has optical and thermodynamic properties. They interact with radiation energy and have a significant impact on the curing process.
1. Optical density: similar to absorption, it is composed of two factors: “opacity” and the thickness of the film; Light dilution including absorption and scattering; It is represented by a single number, rather than as a distribution of the spectrum.
2. Infrared absorption rate: temperature has a significant impact on the rate of curing reaction; Although the temperature rise in the reaction also contributes to the temperature, the radiation from the UV lamp is the fundamental source of surface heat. Excessive temperature rise is one of the important limiting factors affecting the curing process.
3. Spectral absorption rate: Energy is the effect of the absorption of wavelengths into a substance in a gradually increasing thickness. More energy is absorbed around the surface, meaning less energy is available deep down. But this varies with the wavelength. The total spectral absorptivity includes all effects from phototriggers, monomolecules, oligomers, and additives including pigments.
4. Reflection and scattering: compared with absorption, light energy is more changed by matter (or within matter); This is usually caused by the substrate material and/or pigment in the curable material. These factors reduce the UV energy reaching the deep layer, but improve the curing efficiency at the reaction site.
The above explanation is the relevant knowledge of the scientific analysis of UV curing. Auvcure is a professional manufacturer of all kinds of UVLED point light source, [UVLED line light source], UVLED surface light source and [UV curing machine], and can provide solutions and customization according to the actual needs of customers. The company has Japanese production technology, products are exported to South Korea, Japan, the United States, Brazil and other places. Welcome friends from all walks of life exchange guidance. If you want to know more about the UV curing machine, welcome to consult customer service online or call the company’s service hotline for consultation, we will be happy to provide you with quality service! Some of the information/pictures in this article are from the Internet, only for the purpose of sharing new information in the industry, not for commercial use. If any rights are involved, please inform us immediately, and we will delete it immediately. Thank you.
