There is a printing layer on the surface of the pharmaceutical packaging aluminum foil, which can indicate the relevant information of the drug by printing, and also play a role of publicity by printing company information. The printing material is usually special printing ink, but the ink layer will fall off the color. How to analyze the reasons for this situation? Today, Huawei Aluminum is going to analyze a reason for this aspect with you.

The first problem to be solved is that the ink layer falls off on the aluminum foil surface of the drug blister packaging. The first step can be explored from the packaging material. The drug packaging material is multi-layer composite, and the outermost layer is the printing layer. Because of the poor adhesion or heat resistance of the aluminum foil protective layer, the protective layer of the aluminum foil surface can prevent oxidation and corrosion of aluminum foil, but also protect the printing layer of the aluminum foil surface from being worn. But if the adhesive or heat resistance of the protective layer is poor, or in the production process of thermal bonding or other heat off, the protective effect of the protective layer of ink will be weakened a lot, in this case, the ink layer is prone to be worn, off and other problems.

If you want to avoid the occurrence of this situation can be verified by the protective layer adhesion, protective layer heat resistance test, to see which step of the problem.

In addition to packaging materials, if the printing process is not properly controlled, the adhesion and strength of the ink on the aluminum foil surface will decline, and the ink layer will fall off after the loss of the protective layer. Therefore, in the production process, attention should be paid to the monitoring of the adhesion and heat resistance of the protective layer of medicinal aluminum foil, and the printing process should be adjusted appropriately according to the real-time data and production status.

Some pharmaceutical aluminum foil manufacturers will also use solvent-based protective agents, the main chemical components of this solvent are nitro fiber, synthetic resin, plasticizer, cosolvent, diluent, etc. These are mixed according to a certain ratio, stirred by the reaction reactor to form a solvent, mechanical coating on the surface of aluminum foil to produce a layer of protective film, can protect the ink layer does not fall off, and high wear resistance.