What problems should be paid attention to when printing food packaging bags?
With the development of society, the demand for food packaging bags is increasing, and people's requirements for food packaging bags are also getting higher and higher. Daily food packaging bags refer to those that are directly in contact with food and are used to hold and protect food. film container. It is usually used to package fresh food in various industries. If the classification of food packaging bags is carried out according to the type of product contained in the current situation: it can be roughly divided into general food packaging, vacuum food packaging, or boiled food packaging, inflatable food packaging and functional food packaging. Therefore, there are many applications of food packaging bags in daily life, but do you know what problems need to be paid attention to when printing food packaging bags? Today, the editor will take you to understand what problems need to be paid attention to when printing food packaging bags.
1. When printing food packaging bags, the roller pressure should be adjusted appropriately; if the ink color is too heavy and the solid bottom is too large, it is easy to stick to the ink roller. Then before printing, reduce the pressure of the roller, and add more additives or adhesives to the ink to ensure uniform pressure. If you are not careful when printing the packaging bag, the rubber will be rolled; if the ink color is too heavy and the solid bottom is too large, it will easily stick to the rubber or ink roller. Therefore, the pressure on the cylinder should be reduced before printing, and the lining inside the rubber should be reduced. In order to avoid rubber sticking and rubber rolling, more additives or adhesives should be added to the ink, and at the same time, be careful to avoid double sheets, multiple sheets and paper tilting, and ensure that the pressure is even and does not roll the rubber.
2. The printing of food packaging bags is the same as other printed products, and the rules need to be accurate, otherwise it will affect its quality. During printing, adjust the height of the front gauge and the height of the side gauge press board according to the thickness of the paper. At the same time, adjust the pressure of the press wheel and brush wheel on the paper feed board, and tighten the loose paper feed belt. If you find that the rules are not good when you start the machine, you should also check the paper feeding status in time, as well as the pressure of the paper passing wheel and the paper pressing wheel; for thicker paper, the pressure of the paper pressing wheel and the brush wheel should be heavier. And check the time of paper loading and drawing, as well as the handover time of side gauges and swing teeth, and deal with problems in time until the up and down and left and right rules are accurate and error-free.
3. When printing food packaging bags, ink color has a direct impact on the quality of printed matter. Packaging plays a very important role in protecting and decorating items. The quality of packaging and printing will directly affect people's aesthetics and consumption. Therefore, when printing packaging, it must meet the quality standards. To complete exquisite and beautiful products, we need to carefully complete every step of printing, so that there will be considerable profits and quality.