CCD automatic screen printing machine ink adaptation

　　CCD automatic screen printing machine in different printing needs, need to adapt to different types of ink to ensure printing quality and effect. The following are some key points about the ink adaptation of CCD automatic screen printing machine:

　　Ink type selection

　　UV ink: suitable for applications requiring high curing speed. UV ink can be cured quickly under ultraviolet irradiation, and the cured ink has good wear resistance, corrosion resistance and gloss. For example, when printing the logo of some electronic components or the solder resistance layer of circuit boards, UV ink is often used because it can cure in a short time, improve production efficiency, and can meet the strict requirements of the electronics industry for ink performance.

　　Water-based ink: with environmental protection, non-toxic, no smell and other advantages, in line with modern environmental protection concept. It is suitable for printing some products with high environmental protection requirements, such as food packaging, pharmaceutical packaging and so on. The drying method of water-based ink is mainly through the volatilization and penetration of water, and the drying speed is relatively slow, but the drying speed can be accelerated by increasing the ventilation equipment or increasing the drying temperature.

　　Solvent-based inks: have good solubility and printability, and can obtain better printing results on various materials. The drying speed of solvent-based ink is faster, and the pattern after printing is clear and bright. However, solvent-based inks contain organic solvents, which will cause some pollution to the environment after volatilization, and their use is restricted in some occasions with high environmental protection requirements.

　　Ink performance requirements

　　Viscosity: The viscosity of the ink has an important impact on the printing quality. The viscosity is too high, the ink is not easy to transfer, which will lead to incomplete printing patterns, ink shortage and other problems; The viscosity is too low, and the ink is easy to flow, which will cause the printing pattern to be blurred and the edge is not clear. For CCD automatic screen printing machines, the viscosity of the ink is generally required to be within a certain range, and the specific value is determined according to the printing material and printing requirements. For example, when printing plastic film, the viscosity of the ink is usually lower than when printing paper.

　　Dryness: The drying speed of the ink should match the printing speed of the screen printing machine. If the ink dries too slowly, it will lead to the pattern after printing in the process of winding or stacking. If the drying is too fast, the ink is easy to skin on the screen plate, blocking the mesh, affecting the printing effect. Therefore, it is necessary to choose the appropriate drying speed of the ink according to the working speed and production environment of the screen printing machine, or adjust the drying speed of the ink by adding desiccant or slow drying agent.

　　Adhesion: The ink needs to be able to firmly adhere to the surface of the printing material to ensure the durability and stability of the printed pattern. Different printing materials have different adhesion requirements for ink, for example, when printing on metal surfaces, ink with good adhesion needs to be used to prevent ink from falling off during use. In order to improve the adhesion of the ink, the printing material can be surface treated, or a special adhesion accelerator can be added to the ink.