Ultraviolet radiation curing technology is an entirely new green technology developed since the 1970s. It is used to produce UV curing coatings, or UV coatings. With non-volatile organic compounds (VOC), small environmental pollution, fast curing speed, energy saving, good performance of cured products, suitable for high speed automatic production and other advantages. However, traditional coatings are volatile and slow curing, which is not conducive to environmental protection. Therefore, UV coating is the main substitute of traditional coatings. Due to the unique technology and application advantages of UV coating, it has been widely used in various industries and fields, such as electronic products, machinery manufacturing, metal corrosion protection, etc., and has been praised as a new environmental new material. The latest data show that countries such as Europe and the United States have adopted legislation to limit the use of traditional coatings with high VOC emission, and gradually replace traditional coatings with environmental new materials such as UV coatings. In the United States, Germany, Italy and other developed countries, the production of UV coatings accounted for about 10% of the total paint production and increased by 15% annually. According to German hermes silk company predicts that by 2010, the world of UV curing coatings production will reach more than 50% of the total output of the coating industry, and the UV coating the new environmental protection material will remain the advantages in 30 years, its UV coating market space is enormous. According to the figures provided by the China coating industry association, in 1999, China's domestic production volume was 1.8 million tons of paint, and 99% of it was the traditional coating of organic solvents. With the enhancement of China's national strength and the importance of environmental protection, it is necessary to replace the traditional organic solvent coatings with UV coatings. In fact, the domestic demand for UV coatings is increasing by 10% each year, that is, the net increase in demand is at least 180,000 tons. According to statistics, the average per capita coating in Europe and America is 4.6KG, while the domestic market is only 1.5KG, and the market potential is huge. In our country already some manufacturers use this UV coating, become production high-grade product processing use development trend.

The basic meaning of radiation curing is to use ultraviolet UV or electron beam to trigger the solidification process of liquid formula with chemical activity on the substrate surface to realize rapid reaction.

UV / EB solidified industrial application provides an advanced processing method for the solidification of material surface. This solidification technology is different from traditional technology such as heat curing, the biggest advantage of which is that the radiation curing adopts efficient energy - ultraviolet or electron beam as the trigger method to realize the coating curing quickly.

1.Ultraviolet Light and Electron Beam

Ultraviolet light and electron beam can be regarded as the members of the large family of radiation. The ultraviolet light is an electromagnetic radiation and the electron beam is the accelerated high-energy electron flow.

UV-C (100~280nm), UV-B (280~315nm) and UV-A (315-380nm) are subdivided into UV-C (100~280nm), UV-B (280~315nm) and UV-A (315~380nm). The ultraviolet light source used in radiation curing is usually ultraviolet lamp which is excited by electric energy.

Electron beam is also a kind of radiation, it is a batch of accelerated electron flow, the particle energy is much higher than ultraviolet ray, can make air ionize, so high energy electron beam also can be called ionizing radiation. Electron beam curing usually does not require photo-initiator, which can induce chemical reaction directly, and the penetration of material is much larger than that of ultraviolet light. The device that produces an electron beam is called an electron accelerator. A scanning electron accelerator used in radiation curing is very similar to a television set used by households. In the television, the accelerated electron flow scanning TV screen can obtain the visual information, and the electron beam of the electron accelerator in the radiation curing can be scanned to realize the curing process.

2.Radiation Curing - a system engineering

Radiation curing is developed on the basis of the existing science and technology a new technology so many kinds of technologies can be seen as a common structure form of complex including radiation source (UV and EB), raw materials, monomer and oligomer, light initiator, all kinds of additives such as pigments, additives, chemical formula coatings, printing ink, adhesive, base material and the coating device and so on. Radiation curing can only use the reasonable configuration of these technical elements to play its inherent vitality.

In fact, these technological factors have formed interdependent market chains in the industrial process of radiation curing, so as to ensure the market competitiveness. Therefore, the UV radiation curing itself is a systematic project.