曲面丝网印刷技术（Surface screen printing technology）.doc

曲面丝网印刷技术（Surface screen printing technology） Surface screen printing technology 1. production of film The originals submitted by clients can be either monochrome or multicolor. The most basic requirement is to ensure that the length of the screen text is transferred to the circumference of the product to meet customer requirements. For multicolor originals, it is important to make sure that the film is suitable for overprinting. Although it is still troublesome to realize dot printing on the surface of cylinder products, more and more enterprises begin to try. Screen printing screen mesh due to the restrictions, can not reproduce the fine details, so we must consider the characteristics of screen printing in the production of color film. Plate 1. screen mesh and material The cylindrical products screen printing and screen printing is basically the same, the difference lies in the design of printing product cylinder most PP and PE often have a rough surface, the contact point and the screen is easy to cause pressure imbalance, choose a good scalability nylon mesh can make up for this defect. One of the screen mesh selection is the most important work. According to the theoretical analysis and experimental results, we believe that the 320 ~ 360 line / inch mesh size is suitable for cylinder screen printing products. 2. screen color White screen more obvious limitations in the production of fine screen and screen printing, the tone is not used, the best use of the dyed silk, dyeing can effectively control the light penetrating screen on the screen in the photosensitive glue layer, avoid the decrease of accuracy caused by the scattering phenomenon of screen, screen is equivalent to eecure staining, shielding effect the harmful light. Of course, now the vast majority of manufacturers of printing products is not too difficult, the use of white screen is also a better choice. One advantage of white screen is that it is in contrast with the color of the photosensitive glue