UVLED Curing Principle

The so -called UVLED curing is to add light causes to the resin in a special formula. After absorbing the high -strength ultraviolet light in the UVLED optical curing device, active free radicals or ion bases are generated, which causes aggregation, cross -linking and branches to react, so that the resin reactor makes the resin (UV paint, ink, adhesive, etc.) from liquid to solid state in a few seconds. The physical properties of UVLED curing materials are essentially affected by UV -optical curing machines. The expected performance, whether it is protecting glue, ink, or adhesive, it will depend on the parameters, design and control methods of the LED chips in these curing machines. The four key parameters of the LED chip are: 1.UV radiation (or density) 2. spectral distribution (wavelength) 3. Radiation (or UV energy) 4. Radiation heat is relative to large radiation or radiation volume, and different ones, and different ones UVLED spectrum, ink and protective glue will show very different features. The ability to identify different LED chip characteristics and make them match the optical characteristics of curing materials, and expand the scope of solidification of UVLED as a fast and efficient production process. There are many optical and physical properties of the curing system that affects the solidification effect, which leads to the difference in the appearance characteristics of UV curing materials. Effect of related parameters on UV curing quality 1. UVLED machine wavelength: The spectrum of 365nm band is suitable for ordinary optical curing ink (not suitable for ink required by special spectrals such as ice flowers and wrinkles). Some UV machines are too much due to the influence of the LED chip, which will affect the light solid effect. It is recommended that customers conduct light solid tests when selecting UV light fixing devices to test whether the wavelength of the UV machine meets the optical solid requirements. 2. The power of the UVLED machine: Generally, the power required by UV optical ink is 80-120MW/CM, and the absorbing light energy is about 2000 3000mJ/cm. Excessive light energy can cause brittleness of ink. Low -low light solid effect. Application example UV light radiation physical properties are similar to visible light, all of which are linear, but their penetration power is far less visible. The shorter the wavelength, the worse the penetrating power. Internal curing with better light transmission. 1. The UV light generates a UV while generating a certain IR radiation heating. This radiation fever is beneficial for workpieces with little temperature. It is expected that the effect is more obvious. Application example: UV paint for wooden floors, metal products, etc.; UV insulation coatings in printed circuit boards; UV glue in glass products. 2. The influence on temperature is more sensitive or the temperature -resistant chemical parts with poor temperature resistance. Reducing IR radiation thermal is one of the cutting -edge topics of UV curing equipment in various countries in the world. Generally, it is used to use water cooling, reflection, frequency filtering and other methods. Solved, but the cost is the ultraviolet light power that must be lost. Application examples: Various PVCs (such as IC cards), plastic film, Ke (outlet) UV oil printing, paper special printing (ice flower), computer keyboard printing.