Double blister packaging refers to a packaging form that uses two blister packages to encapsulate the paper card and the product. Its characteristic is that high frequency machine is needed to seal the double-bubble shell, the efficiency is low, the packaging cost is higher, but the edges are neat and beautiful, and the product appearance is high-grade.
The issues that should be noted are:
1. The bubble shell can only use PVC and PETG film, otherwise it cannot be heat-sealed or the heat-sealing effect is not good;
2. The quality of the high-frequency mold determines the quality of the edge of the double bulb.
3. Recently, a high-frequency machine capable of heat-sealing PET has appeared, but the cost is high, and the process is not too mature at present.