UV ink, also known as UV ink, is the use of ultraviolet radiation of a certain wavelength, through the instantaneous photochemical reaction, so that the liquid UV ink becomes a solid ink.
UV inks have developed rapidly in the past 10 years and have entered the mature stage, and are recognized by the world as pollution-free ink varieties. UV flexo printing ink has received universal attention and favor in foreign countries, mainly because it has the following characteristics:
1. UV flexo printing ink is safe, reliable, solvent-free, non-flammable, and non-polluting. It is suitable for packaging materials with high sanitary requirements such as food, beverages, alcohol and tobacco, and pharmaceuticals. Flexo-UV inks have been used in foreign food packaging for many years without any problems.
2. UV flexo printing inks have good printability, high printing quality, no change in physical properties during the printing process, no volatile solvent, stable viscosity, and are not easy to paste plate, can use higher viscosity printing, strong ink, high dot definition, reproduction of tone It is good in nature, bright and light in ink, and firmly attached, suitable for printing fine products.
3. UV flexo printing inks can be instantaneously dried, have high production efficiency and wide application range. They have good adhesion on different printing carriers such as paper, aluminum foil and plastics. Products can be stacked immediately after printing, and adhesion will not occur.
4. UV flexo ink has excellent physical and chemical properties. The process of UV curing and drying is the photochemical reaction of UV ink, ie, the process of changing from a linear structure to a network structure. Therefore, it has many excellent physical and chemical properties such as water resistance, alcohol resistance, alcohol resistance, abrasion resistance, and aging resistance. This type of ink is not as good as it is.
5. UV flexo ink consumption. Because there is no solvent volatilization, the effective composition is high, nearly 100% can be converted into ink film, its amount is less than half of the ink or solvent ink, and the cleaning times of the printing plate and the anilox roller can be greatly reduced, so the comprehensive cost is relatively low. Based on the above characteristics, UV flexo printing ink has obvious advantages and development prospects in terms of environmental protection, quality, and technology development.
The promotion and application of UV flexo printing technology in the country has a process from the current point of view. On the one hand, it is a further understanding and understanding of UV flexo printing technology. On the other hand, it is necessary to improve and perfect the equipment, light sources, supporting equipment, and process technologies.