What are the commonly used plastic sheets for blister packaging? What is blister packaging?

What are the commonly used plastic sheets for blister packaging? What is blister packaging?
The sheet used for blister packaging is called rigid sheet or film, commonly used are: pet (polyethylene terephthalate) rigid sheet, pvc (polyvinyl chloride) rigid sheet, ps (polystyrene) rigid sheet. PS hard sheet has low density, poor toughness, easy to burn, and will produce styrene gas (a harmful substance) when burning, so it is generally used to produce various industrial-grade plastic trays. The hard pvc sheet has moderate toughness and is not easy to burn. When burning, it will generate hydrogen, which will have a certain impact on the environment. pvc is easy to heat and seal, and can be wrapped with a sealing machine and a high-frequency machine. It is the main raw material for the production of transparent plastic products. The pet hard sheet has good toughness, high definition, easy to burn, and does not produce harmful substances when burning. It is an environmentally friendly material, but the price is high, and it is suitable for high-end blister products. However, it is not easy to heat seal, which brings great difficulties to the packaging. In order to solve this problem, we compound a layer of pvc film on the surface of pet, which is called petg hard film, but the price is higher.
What is blister packaging? What should be paid attention to in the packaging of blister cards?
Blister packaging refers to heat sealing the blister on the surface of a paper card containing blister oil, which is commonly used in common shopping mall battery packaging. Its characteristic is that the product must be sealed between the paper card and the blister. The problems that should be noted are: 1. It is stipulated that the surface of the paper card must be covered with plastic oil (so that it can be thermally bonded to the pvc bubble shell); 2. The bubble shell can only be made of pvc or petg sheets; 3. Since the bubble shell is only sticky On the surface of the paper card, so the packaged product is not prone to overweight.