Blister packaging manufacturer The double bubble shell produced is relative to the single bubble shell. In a broad sense, it refers to all bubble shells that can independently form a container to package products and cards, including half folded bubble shells, triple folded bubble shells, bottom sheathed bubble shells, half bubble shells, etc. In a narrow sense, it only refers to the bubble shell with two separate layers, which can be sealed by high-frequency machine and ultrasonic machine (very few also use chemical solvent for edge sealing). Its feature is that the product and paper card can be sealed in a two-layer bubble shell. This bubble shell is mostly used on the shelves of supermarkets. Generally, PVC, PET and PETG materials with high transparency are used.

The PVC standing double bubble shell is sealed with a high cycle heat sealing machine, and a bubble body for standing is designed at the bottom of the bubble shell on the back. Therefore, the product can be hung on the shelf or placed in the counter.

PET double bubble shell is sealed by ultrasonic heat sealing machine. Due to the limitation of ultrasonic machine process, it can only be sealed in spot shape, so it cannot be completely sealed. However, this packaging method is environmentally friendly, and the cost is lower than PETG.

PVC double bubble shell packaging, using ordinary high-frequency machine heat seal. PETG double bubble shell packaging. Generally, PET foam shell cannot be sealed by ordinary high-frequency machine. Composite material PETG is used to ensure the environmental protection of the material (equivalent to PVC), and conventional high-frequency machine heat sealing can be used.

The double folded blister shell/double folded box is a kind of double blister shell. After a complete blister shell is folded through the fold line in the center, the product and the paper clip are clamped in the middle. Generally, buckles and grooves are used to butt the blisters on both sides together. The feature of this kind of blister is that the packaging equipment can not be used for later packaging, but it is not suitable for heavier product packaging.