With the re-improvement of screen printing technology, screen printing equipment has also progressed from manual, monochrome to semi-automatic, multi-color semi-automatic. The quality and grade of printing have increased significantly, so higher requirements are imposed on screen printing inks. UV ink is an environmentally-friendly ink that has progressed rapidly in recent years. It is well-received by the printing industry because of its instant curing (dry, non-volatile solvent) and easy application. Especially in the field of screen printing, UV inks are widely used. The substrates are paper, synthetic paper, wood products, molecular compound plastics (ABS, PS, PC, PVC, PMMA, PET, etc.), coated metals, Glass, porcelain pottery, etc. The main products include: PVC bags, PVC bags, PVC bags, PVC rulers, plastic boxes, folding boxes, PVC boxes, PVC tags, listings, etc.
Screen printing ink layer thickness, bright color, simple process, low investment, fast effect, because this is in light industry, electronics, machinery, transportation, textile, chemical, economic activities, art, advertising, dressing, packaging, etc. Many industries have achieved a wide range of applications, especially in the fields of jewellery, greening of people's livelihoods, economic activity advertising, and electronic industry printed circuits, and can not be replaced by other forms of printing. In the modern printing industry, no screen printing can not be called a complete printing company, so the reputation is not without it.
The radiation curing industry is a recently emerging industry. Until now, it has focused on the use of inks, lacquers, adhesives, and a combination of natural resins, monomers, hair conditioners, and auxiliaries. Compared with the traditional related industries, although the foundation is more fragile, because the radiation curing products have their own unique places, they conform to the "3E" principle, that is, "energy saving, environmental protection and high efficiency". Because of this, it will definitely be The national economy has been widely used in various fields and has helped the industry to progress side by side. The combination of the screen printing industry and the radiation curing industry is the most striking example of the successful application of UV inks in the silk screen industry.
The application of UV inks in screen printing has the following unique features:
1. The curing speed is fast, the UV facility is small in size, and the production rate is high. It is especially suitable for multi-color, all-semi-automatic operation. In the past, solvent-based ink drying was required to be equipped with a long-distance baking line, and even a single-color print was dried to a baking device of about 10 m. If you think it is appropriate to use UV ink printing, you can solve the problem by eliminating only one UV light source. It saves the cost of the installation facilities, saves space, and greatly increases the production rate.
2, thick ink layer, a wide range of substrates, simple and flexible operation. Ordinary solvent ink, the ink solid content is about 40%, and the solid content of the UV ink after curing is close to 100%, which is 2 to 5 times that of ordinary ink. If the UV ink is printed with a thick film screen, the effect is better.
3, the ink will not congest the screen, the liquid concentration is stable, adapt to high-quality printing. The solvent is a part of the screen printing ink, the area is different, the temperature and the degree of wetting are different, and the performance of the ink is different. Some say that 90% of the problems in screen printing are solvent related. UV inks do not contain volatile substances, ink viscosity changes are small, easy to operate, and these problems are solved beautifully, so that the printing quality is greatly increased. In addition, because the ink cures quickly, the residence time of the printed matter during the drying process is reduced, which reduces the possibility of contamination by dust.
4. The wear resistance, solvent resistance, weather resistance and other properties are satisfactory. The chemical substances in the UV ink form a polymer three-dimensional network polymer through cross-linking reaction. The ink table covers the face and has strong chemical resistance and abrasion resistance, which can reduce the background of the printed matter due to the despicable background. Loss, extending the time of certain prints in outdoor exhibitions.
5, does not contain volatile solvents, no negative impact on the human body and background. At present, the ink for screen printing accounts for the mainstream of volatile dry solvent inks in terms of yield and variety. Due to its slow drying time, 60% of the solvent is volatilized during the drying process, which is contaminated by the background. It has become the goal of the printing industry to seek the ink with little pollution, fast drying and low energy consumption.