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Common terms for blister packaging 1. What are the common plastic sheets used in blister packaging? What are their respective features? Answer: The sheet material used for blister packaging is called hard sheet or film. Common types include ET (ethylene terephthalate) hard sheet, PVC (polyvinyl chloride) hard sheet, PS (polystyrene) hard sheet, PS flocked sheet, and PVC with gold plating (aluminum vacuum plating). PS plastic has a low density, poor toughness, and is flammable; it is generally used to produce various industrial blister trays, and it also meets the requirements for food packaging. PVC sheet has moderate toughness, is not easily flammable, and is easy to heat-seal; it can be edged using sealers and high-frequency machines, making it the main material for producing transparent blister products. PET hard sheet has good toughness and high transparency; it burns easily but does not produce harmful gases during combustion, making it an environmentally friendly material. However, it is expensive, and thus suitable for high-end blister products. In Europe and the United States, blister packaging is generally required to be made from PET hard sheet, but its difficulty in being heat-sealed poses significant challenges for packaging processes. To address this issue, a PVC layer is applied onto the surface of PET, resulting in what is known as PETG hard sheet – although its price is even higher. The treated material is PS flocked sheet, which is produced by processing PS sheets through processes such as coating, electrostatic flocking, drying, removing excess fluff, and winding. It is mainly used as an inner lining for luxury gifts and gift boxes for electronic products. PVC gold-plated (vacuum aluminum-coated) sheets are currently mainly used to produce lining boxes for foods such as mooncakes and rice cakes. 2. What is card-insert packaging? What considerations should be taken for card-insertion packaging? Card-insert packaging refers to a packaging method in which a paper card is combined with a transparent blister pack that has been folded at three sides. Its advantage is that no packaging equipment is required for this process; workers simply need to place the product, the blister pack, and the paper card in their proper positions. Points to note are: 1. The paper card and the folded-edge blister pack should be of appropriate size; if inserted too tightly, the paper card and the blister pack will deform ； If it’s too loose, it will come off easily. 2. When the product is too heavy, it is necessary to consider using staples to secure the paper card to the foam sleeve at a certain position. 3. What is card-insert packaging? What issues should be considered when using card-based packaging? Card-based packaging refers to heat-sealing a blister sheet to the surface of a paper card coated with blistering oil; this type is commonly used for battery packaging in supermarkets. Its feature is that it requires blister sealing equipment to enclose the product between a paper card and a bubble wrap. Points to note are: 1. The surface of the paper card must be coated with blistering oil (so that it can be heat-sealed to the PVC blister shell) ； 2. The blister shell can only be made from PVC or PETG sheets ； 3. Since the bubble wrap is merely attached to the surface of the cardboard, the packaged products should not be too heavy. 4. What is double blister packaging? What issues should be considered for double blister packaging? Double blister packaging refers to a packaging method in which the paper card and the product are enclosed together using two blisters. Its feature is that it requires a high-frequency machine to seal the double blister shells, resulting in low efficiency and higher packaging costs; however, the edges are neat and attractive, giving the product a premium appearance. Points to note are: 1. Only PVC and PETG films can be used for the foam cover; otherwise, heat sealing will not be possible or the sealing quality will be poor ； 2. The quality of the high-frequency mold determines the quality of the edges of the double blister shells. 5. What is semi-foam shell packaging? What issues should be considered for semi-foiled packaging? Half-shell packaging refers to a type of double-shell packaging in which the product is partially exposed; it involves using two shells to enclose the paper card and the product, with part of the product visible outside the shells. This packaging style is suitable for particularly long products. Its characteristic is that it requires manual use of scissors to cut open the parts of the blister pack where the product is exposed, followed by sealing the edges of the double blister pack using a high-frequency machine; this results in low efficiency and higher packaging costs. However, it offers a good visual appearance and allows customers to touch the products directly when selecting them in the supermarket. Points to note: 1. Products that are prone to getting dirty are not suitable for this type of packaging ； 2. When cutting holes in the bubble shell, care should be taken to keep the edges neat ； 3. The blister shell must be made of PVC or PETG rigid sheet. 6. What is external semi-foam shell packaging? What considerations should be taken for external semi-foam shell packaging? The full meaning of external semi-molded shell packaging is that the entire product is placed outside the dual shells; these dual shells merely enclose the paper card and serve as a base for the front part of the product, with the product being connected to the shells using plastic straps. Its characteristic is that it requires a high-frequency machine to seal the double blister shells and drill holes for straps, resulting in the lowest efficiency and high packaging costs; however, it can meet the need for users to touch the product. 7. What is fold-over blister packaging? What considerations should be taken for foldable blister packaging? Folded blister packaging refers to a situation where one side of the two blisters is joined together during the thermoforming process, and after folding, this forms the bottom and top surfaces of the double blister. Its feature is that it does not require a high-frequency sealing process; instead, tabs are created at specific positions on the foam shells to connect them together. Staples can also be used if necessary. PET hard sheets can be employed as the material of choice, thereby achieving the use of environmentally friendly materials. Points to note: 1. Since there is no high-frequency machine for edge sealing, the edges need to be cut with high precision using a cutting machine ； 2. The tightness of the buckle should be moderate. 8. What is triple-fold bubble wrap packaging? What issues should be considered when using tri-fold blister packaging? The three-fold blister packaging involves folding the blister into three sides (front, bottom, and back), creating an additional bottom edge so that the product can stand on a flat surface. Its feature is that it does not require high-frequency sealing; instead, tabs are created at specific positions on the blister pack to connect the pieces together, and staples can be used if necessary. PET hard sheets can be employed as the material of choice, thereby achieving the use of environmentally friendly materials, making it suitable for packaging large-diameter products. Points to note: 1. Since there is no high-frequency machine for edge sealing, the edges need to be cut with high precision using a cutting machine ； 2. The tightness of the buckle should be moderate. Noun Explanation: Thermoforming is a plastic processing technique. The basic principle involves heating flat plastic sheets until they become soft, then using vacuum to attach them to the surface of a mold; after cooling, the shape is finalized. This method is widely used in industries such as plastic packaging, lighting, advertising, and decoration. Thermoformed packaging: A general term for plastic products manufactured using thermoforming techniques, with the products being enclosed using appropriate equipment. Blister packaging products mainly include: blister packs, trays, and blister boxes; synonyms include: vacuum covers, blister sheets, etc. Blister packaging equipment mainly includes: blister formers, punching machines, sealing machines, high-frequency machines, and folding machines. The packaging products formed by encapsulation can be classified into: card-insert type, card-suction type, double blister type, half-blister type, foldable blister type, triple-fold blister type, etc. Blister packaging: This involves using the blistering process to transform transparent plastic sheets into transparent plastic shapes with specific protrusions, which are then placed over the product’s surface to protect it and enhance its appearance. Blister trays: Also known as plastic inserts, they are made using blistering technology to transform plastic sheets into plastic with specific grooves; products are placed within these grooves, which serves to protect and enhance the appearance of the products. Flocked blister packaging: It is a type of blister tray made from special materials, in which a velvety layer is applied to the surface of ordinary plastic sheets, giving the tray a velvety texture that enhances the appearance of the packaged items. Antistatic blister packaging: It is a blister tray made from a special material, whose surface resistance is less than 10 to the 11th power ohms. Mainly used for blister trays for electronic and IT products. Thermoforming molds: Molds used in thermoforming production; the cheapest ones are gypsum molds, followed by electroplated copper molds, while aluminum molds are the most expensive. The mold is equipped with small holes that are used for vacuum suction to hold the heated sheet in place, thereby creating a blister pack product. Thermoforming: This is what is commonly referred to as blister forming. A thermoforming machine is used to attach the heated and softened plastic sheet to the surface of a mold; after cooling, plastic with a raised and recessed texture is formed. Blister cutting: The plastic products that have been formed by blister molding are then processed using a punching machine, whereby the large sheets of material are cut into individual products with knife dies. Blister folding: There is a type of blister packaging known as card-insert packaging, in which the three edges of the blister sheet are folded back using a folding machine, so that during the next packaging step, a paper card can be inserted into those folds, thereby creating the card-insert packaging. Thermo-sealing for blister packaging: It is a blister packaging process in which a sealing machine is used to heat-seal a paper card coated with blister oil to the foam shell, thereby creating a blister-packaged product. Thermoforming high-frequency sealing: It is a thermoforming packaging process in which high frequencies are generated by a high-frequency machine to bond the foam sheets together, resulting in a double-foam-sheet package