Why does the ink layer peel off in the aluminum foil bag?

Aluminum foil bags are the most common product in packaging bags, and are widely used in food packaging, electronic packaging, etc. The adhesion or heat resistance of the protective layer of aluminum foil bags is poor, and the ink is more likely to fall off. YLTpacking aluminum foil bags custom manufacturers are How to solve the problem of ink falling off? Quality problem: Analysis of the reasons for the peeling off of the ink layer in the drug packaging bag in the aluminum foil bag: ——The protective layer on the surface of the packaging material aluminum foil bag can not only prevent oxidation and corrosion of the aluminum foil bag, but also protect the printed layer on the surface of the aluminum foil bag from being damaged. Grinding flowers. If the adhesion of the protective layer is poor or the heat resistance is poor, when it falls off during heat sealing or other heating processes, the protective effect on the ink will be weakened, so that the ink layer is prone to problems such as grinding and falling off. It can be verified by the adhesiveness of the protective layer and the heat resistance test of the protective layer. Improper control of the printing process – if the printing process is improper, the adhesion and strength of the ink on the surface of the aluminum foil will easily decrease. After the protective layer is missing, the ink is prone to grinding or falling off. Expert advice: ——Pay attention to the testing of the adhesion and heat resistance of the protective layer of the aluminum foil bag ——Appropriately adjust the printing process Typical quality cases: ——Test samples: Pain reliever packaging bags——Targeted test items : Adhesion of the protective layer, heat resistance of the protective layer – test results: In the adhesion test of the protective layer, the protective layer of the aluminum foil bag did not fall off, but in the heat resistance test of the protective layer, the protective layer obviously occurred shedding. Therefore, the heat resistance of the protective layer is poor, and the protective layer is easy to fall off during heat sealing or other high-temperature processes, which is the main reason that the printed handwriting is easy to be embroidered.