There are always many problems in printing and packaging, so it is necessary to do preventive work in advance, so as not to cause big losses to the work. Today we say what is the cause of the blocking of printing and packaging.
Due to certain factors, such as the rapid evaporation of the solvent, the ink left in the cell will partially dry and solidify. When the printing plate cylinder again into the ink tank, the net hole has been solidified ink is difficult to completely dissolve, ink transfer rate also increases. The cumulative effect is that the cells become shallower and shallower until the blockage fails. This blockage failure is related to the type of ink, viscosity, drying speed, solvent type, printing speed, printing machine structure and other factors, among which the following two reasons are more common.
Ink drying speed. When the ink dries too fast, part of the ink will form a film before transferring to the substrate, and the poor solubility of the ink film will inevitably lead to poor ink transfer, after a period of accumulation, the printing plate will be blocked. The temperature and humidity of the printing shop will affect the drying rate of ink. High temperature or low humidity will accelerate the drying speed of ink. If the ink circulates poorly, the ink in the cartridge can easily form a thin film, which can lead to blockage.
Gravure printing equipment problems. If there are problems in the design of various mechanisms of gravure printing equipment, such as large diameter of the drum, shallow immersion of the plate drum in the ink tank, etc., the hot air box leaked during drying will be directly blown to the plate layout, which will lead to ink drying in the hole on the screen.
Shandong printing and packaging that impurities from the external environment mixed with ink. Gravure printing is fast and the substrate is easy to produce static electricity when running at high speed. Under the action of electrostatic adsorption, it may bring the dust in the surrounding environment and impurities such as debris off the substrate into the ink. Plate cell blockage is an important reason.
In order to prevent the occurrence of such accidents, the circulating pump suction nozzle should be used to remove insoluble impurities in the ink. Intaglio printing more network lines, ink in the larger particles, insoluble substances and sediments will cause plate mesh blockage. When the ink itself pigment separation, precipitation, re - coagulation and other changes, will not easily re - dissolved substances, resulting in blockage.
What happened when the printing and packaging blocked the plate? From several aspects to explain the relevant content of the problem, you have other questions to our website www.xinfengyinshua.cn for consultation!济南印刷厂讲解的内容 更多的内容 请咨询公司官网http://www.xinfengyinshua.cn/