What is the difference between UV ink and EB ink curing?

November 21, 2022 Longchang Chemical

What is the difference between UV ink and EB ink curing?

The same are electromagnetic wave rays of UV ultraviolet and EB electron ray curing, and IR infrared heating curing method is different, although UV (Ultra Violet) and EB (Electronic Beam) the electromagnetic wavelength of the two are different, can be the chemical recombination of the mordant in the ink, that is, the polymer cross-linking effect to form an instant cure. IR infrared ray is the heating of the ink, the generation of multiplicity including a few solvents or water evaporation drying, softening of ink heating, increased mobility of the penetration absorption drying, as well as the ink surface due to heating and air surface oxidation drying, plus part of the resin, polymer grease reunion chemical curing under heating, is a multiplicity of heating and dispersed part of the drying integrated curing effect, and no single complete curing effect. Such as solvent-based printing ink is 100% by the wind disturbance prompted by the solvent evaporation curing is different.

UV curing and EB is different, UV curing because the penetration rate of UV rays is very limited, such as 4 ~ 5μ of the ink coating thickness, we need to slow, high energy UV light to cure, not like flat printing 12,000 per hour, 15,000 high-speed operation to do curing, otherwise the penetration force is not enough to cause the surface layer curing, the inner layer is still in the liquid state like a fried egg, and finally may then dissolve the surface layer The result is a sticky failure. And UV penetration of each color ink has great variation, can easily penetrate Magenta Magenta, blue Cyan ink layer, but will be yellow ink layer Yellow and black Black absorbed a lot, or by the white ink surface layer reflected a lot. Therefore, the printing of color ink layer iterative printing order, UV curing will produce considerable variables, if the absorption of UV light or yellow ink in curing the surface layer, the bottom of the red, blue ink is easy to produce curing is not sufficient, on the contrary, red, blue ink in the upper, yellow, black ink in the lower, it is more likely to do a complete cure, otherwise, each color must be printed in each color sequence, each color to do a separate cure. EB electron ray curing not only no color curing differences, and penetration is particularly strong, including paper media, plastic, etc. can be penetrated, but also can do two-sided printing of one-time two-sided penetration curing.

In addition, white priming ink in UV light forced curing, due to the reflection of UV light is very tricky, but EB rays do not have to consider its penetration, which is better than UV EB curing. But EB curing has an important condition, is the role of the surface must be in the “oxygen-free” state, in order to have sufficient efficiency, if the UV in the air to do irradiation curing, EB must be enhanced by more than ten times the power to do, and its electromagnetic radiation has been a very dangerous operation, there must be very strict safety protection can be, such as enhancing ten times can not operate reasonably, so the solution is only in Curing chamber filled with nitrogen to drive away oxygen, reduce oxygen interference EB-ray cross-linking effect, to achieve high efficiency curing purposes. In fact, in the semiconductor industry, when the coating layer is forced to act, it is also mostly used in the oxygen-free nitrogen chamber for UV light imaging exposure work. Therefore EB ray is only suitable for thin paper pie, plastic pie roll curing coating and printing ink layer, and is not suitable for printing ink curing work in a bite paper chain claw driven by the leaf machine, UV ultraviolet light in oxygen conditions of operation is greater, but few people currently use oxygen-free curing, do the curing work of printing ink or varnishing coating.

 

The difference between UV ink and EB ink in outdoor spray painting on the impact of the industry?

The reason why practitioners are so concerned about the new changes in the industry, the most important reason is that this change may lead to new conditions within the industry in terms of development, which may lead to a new round of competition or even lead to a new reshuffle within the industry, because for new technologies, practitioners for a variety of reasons acceptance is different.

In the UV printing industry, the emergence of new UV flatbed printing for some of the old industry practitioners, the degree of acceptance may not be so high, because these printing industry practitioners may be in the printing technicians, technical equipment has cost a lot of money, and the turnover of funds and personnel flow is not a simple matter, involving the whole body, for them to accept these new technologies still need time. But there are some because of the emergence of this new technology and choose to put into the UV spray painting industry of new investors, they will choose the more advanced new technology, so that the original operators will cause impact, and the market is changing rapidly, in addition to these representative characters, there are some other factors we have not touched will also affect the development of the industry.

UV spray painting uv spray painting although the impact on practitioners is the greatest, but in fact, the lives of consumers also want to be affected, with UV spray painting undoubtedly provides people with more choices, in the long run, with the development of technology, the emergence of UV spray painting for the industry itself is also an irreversible trend.

UV printing in the choice of ink, whether for the machine, or for the final product, is a vital link, study the mainstream of the market ink, we found 2 more well-known ink, one (UV ink) is a very popular application at the moment, the other (EB ink) is a more new ink applications.

1, UV ink: UV (ultraviolet curing) ink is the use of ultraviolet light of different wavelengths and energies under ultraviolet radiation, so that the monomer polymerization of the ink connecting material into a polymer, so that the ink into a film and dry ink, UV ink also belongs to the ink, as ink, they must have a brilliant color (except in special cases), good printability, suitable curing and drying rate, while having a good adhesion, and with wear-resistant, corrosion-resistant, weather-resistant characteristics.

UV ink is a solvent-free, fast drying speed, good gloss, bright colors, water resistance, solvent resistance, good wear resistance ink, UV ink has become a more mature ink technology, its pollutant emissions are almost zero, it should be noted that UV ink in the water-based UV ink is currently the new direction of research in the field of UV ink, because the ordinary UV ink in the prepolymer viscosity is generally very large, need to add Active diluent dilution, and the current use of diluent acrylates have varying degrees of skin irritation and toxicity, so in the development of low-viscosity prepolymer and low toxicity diluent at the same time, another direction of development is to study water-based UV ink, that is, water and ethanol as a diluent, the current water-based UV ink has been developed successfully, and in some printing enterprises have been applied.

2, EB ink: with no volatile solvents, no VOC, the operator’s health hazard is small, small odor, no photoinitiator, online direct drying, inline work and other advantages favored by the majority of users, compared to UV ink, EB ink does not need photoinitiator, curing faster, curing more thoroughly, less odor, which increases the development of EB ink space, so EB ink with EB ink materials and supporting equipment to reduce the price and design of the formula for further maturity, will become a practical, economical ink can be vigorously promoted.

Now EB ink in flexible packaging printing is a growing trend, EB ink’s superior performance and high production efficiency, to provide a broader market, I believe that EB ink applications will be further expanded to become the future of the new environmentally friendly ink in an important variety.

 

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