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Unlike UV curing and EB, UV curing is limited by the penetration of UV rays. For example, the ink coating thickness of 4 to 5μ should be cured with slow, high-energy UV light, unlike 12,000, 15,000 per hour for plain printing. The curing is done under the high speed operation of Zhang, otherwise the penetrating power is insufficient to cause the surface layer to solidify, and the inner layer is like an undecocted poached egg which is still in a liquid state, and may eventually melt the surface layer to generate a sticking fault. Moreover, the penetrability of UV to each color ink is greatly changed, and it can easily penetrate the magenta magenta and blue cyan ink layers, but it is absorbed by the yellow ink layers Yellow and Black Black, or reflected by the white ink surface layer. Therefore, the order of the printed color ink layers will cause considerable UV curing. If the black or yellow ink that absorbs a large amount of UV light cures the surface layer, the red and blue inks underneath will not cure sufficiently. In contrast, the red and blue inks are on the top, and the yellow and black inks are on the bottom, so it is more likely to be completely cured. Otherwise, each color must be cured separately in each color sequence. The EB electron ray curing is not only not the difference between the color of the curing, and the penetrating force is very strong. It can be penetrated by paper media, plastics, etc., and can also be used for double-sided penetrating curing on both sides of the printing.
In addition, when the white ink is forced to cure in the UV light, the reflection of the UV light is very difficult. However, the EB radiation does not need to consider its penetration. This is where EB curing is better than UV. However, there is an important condition for EB curing, but the effective surface must be in the “oxygen-free†state to have sufficient efficiency. If UV curing in the air is used, the EB must be enhanced by more than ten times the power. Its electromagnetic wave radiation is a very dangerous operation. It must be protected by very strict safety. If it can't be operated properly with a tenfold increase, the solution is only to fill the curing chamber with nitrogen to drive off oxygen and reduce oxygen interference. Cross-linking of EB rays achieves high-efficiency curing. In fact, when the coating layer of the semiconductor industry is forcibly used, the imaging exposure of UV light under an oxygen-free nitrogen chamber is also used. Therefore, the EB ray is only suitable for solid coating and printing ink layers of thin paper pieces, plastic film strips, and is not suitable for the ink curing work of the leaf blade machine driven by the bite paper chain claw, and the UV ultraviolet rays are operated under the oxygen condition. Larger, but few people currently use oxygen-free curing, printing ink or coating the curing work.
The same are the UV rays of the electromagnetic wave ray and the EB electron ray curing, which is different from the infrared ray heat curing method. Although the electromagnetic wavelengths of both the UV (Ultra Violet) and the EB (Electronic Beam) are different, the mordant in the ink can be processed. The chemical recombination, that is, the crosslinking of the polymer forms an instantaneous cure. IR IR is used to heat the ink, to produce a plurality of solvents including a small amount of solvent or moisture, and the ink is heated and softened, and the fluidity is increased by osmotic absorption and drying, and the surface of the ink layer is heated and exposed to air to perform surface oxidation drying. With some resins and polymer oils under overlapping chemical curing under heating, it is a heat-generating and dispersive part of the drying combined curing, and there is no single complete curing. For example, a solvent-based ink is 100% different from the wind-induced perturbation of solvent evaporation.