Card insertion packaging refers to a packaging form in which paper cards are inserted together with transparent bubble shells folded on three sides. Its characteristic is that no packaging equipment is required during packaging, and workers only need to place the product, bubble shell, and paper card in place.
The issues that should be noted are:
- The size of the paper card and the folded bubble shell is appropriate, and if inserted too tightly together, the paper card and bubble shell will deform; If it is too loose, it will easily detach.
When the product is too heavy, it is necessary to consider using staples to fix the paper card and bubble shell in a certain position.
In a broad sense, it refers to all bubble shells, but in a narrow sense, it is just a type of bubble shell: formed into a plastic box shape by vacuum molding with sheet materials, and the lid is connected to the container. It is often made with PS, and there are also options for separating the lid and bottom. Different materials can be used. For example, for Japanese fast food boxes, black PS is used for the bottom and transparent PET is used for the lid.
PS hard sheets have low density, poor toughness, are prone to combustion, and produce styrene gas (a harmful gas) during combustion, so they are generally used to produce various industrial vacuum pallets.
PVC hard sheets have moderate toughness and are not easy to burn. When burned, chlorine gas is produced, which has a certain impact on the environment. PVC is easy to heat and can be sealed by sealing machines and high-frequency machines. It is the main raw material for producing transparent vacuum products.
PET hard sheets have good toughness, high transparency, are easy to burn, and do not produce harmful gases during combustion. They are environmentally friendly materials, but they are expensive and suitable for high-end vacuum molded products. Vacuum molded foam shells in European and American countries generally require the use of PET hard sheets, but they are not easy to heat seal, which brings great difficulties to packaging.
To solve this problem, researchers used composite technology to composite PETG (low-temperature PET) on both sides of PET, named GAG hard sheets, But the price is higher. The materials used for thick boards mainly include ABS, acrylic (organic glass), PS, PC, PVC, and other vacuum packaging.
