The blister pack is also called PTP (Press Through Packaging) is becoming more and more common for health foods and pharmaceutical tablets and capsules at present.
It is based on pure aluminum foil for industrial use. On the PTP aluminum foil coating machine for pharmaceutical use, gravure printing technology and roller coating method are used to print text patterns on the surface of aluminum foil and apply a protective layer. On the other side of the foil coated adhesive layer of the linkage process.
The brief process flow of PTP aluminum foil packaging is: aluminum foil unwinding, gravure printing, drying, coating protective layer, drying, coating adhesive layer, drying, aluminum foil winding. During the entire production process, the surface quality of the gravure printing text pattern and the heat seal strength to be achieved by the adhesive layer, the adhesion of the protective layer and the drying temperature, and the speed and tension control of the coating machine operation are needed in the process operation.
1. Grasp the characteristics of aluminum foil and printing ink
2. The amount of solvent added to the ink should be appropriate
3. Adhesives should meet the requirements
4. Print coating grasp dry temperature and time
5. Printing coating speed, coating tension, coating thickness and adhesive quality analysis
Different types of aluminum foil have different requirements for the thickness of the adhesive layer. Generally, the thickness of the coating should be controlled at 3.5 to 7 μm. In the printing and coating of aluminum foil, the speed, temperature, and tension of the aluminum foil are related to each other and pinned each other. The quality of the aluminum foil is directly related to the quality of printing and coating of the aluminum foil.
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