Blister packaging refers to the production of plastic products using the vacuum forming process and the packaging of the products using corresponding equipment. The products mainly include: blister, tray, blister box, synonymous with vacuum hood, blister cover, etc.
Blister packaging materials and their characteristics
PVC sheet has high toughness and is not easy to burn. When burned, it produces chlorine gas, which has a certain impact on the environment. PVC is easy to heat seal and can be sealed with sealing machines and high-frequency edges. It is the main raw material for producing transparent vacuum formed products. PVC sheet is a widely used and popular material. PVC film can be divided into environmentally friendly and non environmentally friendly types, and can be made into various vacuum formed packaging products such as transparent, colored, anti-static, gold-plated, and flocking. Its main characteristics are high transparency, good surface gloss, few crystal points, small water patterns, wide applications, strong impact resistance, and easy molding. The products are widely used in the outer packaging of toys, food, electronic products, pharmaceuticals, appliances, gifts, cosmetics, stationery and other products.
Two PS hard sheets have low density, poor toughness, and are easy to burn. When burned, styrene gas (a harmful gas) is produced, so they are generally used to produce various industrial vacuum formed trays. PS sheet is a new type of environmentally friendly packaging material developed in recent years. With its excellent thermoforming performance, good environmental performance, and hygiene performance, it is widely used in medicine, food, toys, and electronics.
Three PET hard sheets have good toughness and are a new type of material developed in recent years. Due to its excellent toughness, high strength, high transparency, recyclability, easy combustion, and no harmful gases produced during combustion, PVC is gradually being phased out as an environmentally friendly material, but its price is high. Suitable for producing high-end vacuum formed products, the vacuum formed shells in European and American countries generally require the use of PET material, but its high melting point poses great difficulties for high-frequency packaging.
Four PETG materials are used to solve the problem of high melting point of PET materials. People composite a layer of PVC film on the surface of PET, named PETG, but the price is higher. Mainly used for electronics, food, toys, color box windows, collar holders, shoe packaging, etc.
