Blister Professional Terminology； Blister (Blister Molding): A plastic processing technology. The main principle is to heat and soften a flat plastic rigid sheet, then use vacuum to adsorb it onto the mold surface, and form it after cooling. It is widely used in industries such as plastic packaging, lighting, advertising, and decoration. Blister Packaging: A general term for producing plastic products using the blister process and sealing and cutting the products with corresponding equipment. Blister packaging products mainly include: blister shells, trays, blister boxes. Synonymous terms also include: blister shell packaging, vacuum covers, etc. Blister packaging equipment mainly includes: blister forming machines, punching machines, sealing machines, high-frequency machines, and flanging machines. The packaging products formed by sealing can be divided into: carded packaging, blister-card packaging, double-blister packaging, half-blister packaging, folded blister packaging, three-fold blister packaging, etc. Blister Shell: A transparent plastic with a specific convex shape made from a transparent plastic rigid sheet using the blister process. It covers the surface of the product to protect and beautify the product. Also known as blister cover, vacuum cover, plastic face cover. According to the different forms of blister shells, they can be divided into: single blister shell, double blister shell, carded blister shell and blister-card blister shell. Blister Box: A type of blister product with a cover and a base. Those with the base and cover connected together are called folded blister boxes, and those with the base and cover separated are called top-and-bottom blister boxes. Blister Tray: Also called plastic inner tray. It is a plastic with specific grooves made from a plastic rigid sheet using the blister process. The product is placed in the groove to protect and beautify the product. Flocked Inner Tray: A type of blister tray made of special materials. A layer of flocking material is attached to the surface of an ordinary plastic rigid sheet, so that the surface of the tray has a flocking-like feel, which is used to improve the grade of packaging products. Anti-Static Tray: A type of blister tray made of special materials. The surface resistance of this material is less than 10^11 ohms, and it is mainly used for blister trays of electronic and IT products. Blister Mold: The mold used in blister forming production. The cheapest is the gypsum mold, followed by the electroplated copper mold, and the most expensive is the aluminum mold. The mold has small holes, which are used to vacuum adsorb the heated and softened rigid sheet to form blister products. Blister Forming: Also known as blister molding as we often call it. A blister forming machine is used to adsorb the heated and softened plastic rigid sheet onto the mold surface, and after cooling, a plastic with concave-convex shape is formed. Blister Cutting: After blister forming, the large plastic sheet is cut into individual products with a cutting die using a punching machine. Also called blanking, cutting-off, die-cutting, etc. Flanging: There is a type of carded packaging in blister packaging products. It is necessary to fold the three sides of the blister shell to the back using a flanging machine, so that in the next packaging process, the paper card can be inserted into the flanged edge to form carded packaging. Pull Lines: Some unwanted raised lines (not present on the mold) generated during blister forming production. It is necessary to re-modify the mold (reduce height and increase density) and add an additional pressure mold (which we call the top mold) to solve this problem. When the pull lines are too large, the product is regarded as defective and cannot be used for high-end blister packaging. However, in the field of parts turnover, as long as the pull lines are neatly arranged and do not affect the use function, they should be considered qualified. Pull lines are also called: pull bumps, drag lines, etc. Scratches: Scratched marks on blister finished products, especially on transparent blister shells. If the marks are too long or too large, the blister shell becomes defective and cannot be used for high-end packaging. Crystal Spots: During the production of blister sheets, due to tiny dust in the air adhering to the heated plastic material, a type of transparent hard spot is generated. Especially in the production of transparent blister sheets, if such hard spots are too large or too many, the sheet is regarded as defective. Bubbles: During the production of blister sheets, due to air contained in the heated plastic material, the finished sheet produced has bubbles. Especially in the production of transparent blister sheets, if such bubbles are too large or too many, the sheet is regarded as defective. Water Ripples: During the production of blister sheets, due to different materials and processing technologies, the surface of the finished sheet produced has a water ripple shape. Especially in the production of transparent blister sheets, if such water ripples are too large or too many, the sheet is regarded as defective. Generally, the thicker the sheet, the more obvious the water ripples. Qualified PET materials rarely have water ripples, but most PVC materials have the phenomenon of water ripples. Heat Sealing: A blister packaging process. A sealing machine is used to heat-seal the paper card coated with blister oil and the blister shell together to form blister-card packaging. High-Frequency Sealing: A blister packaging process. A high-frequency machine is used to generate high frequency to fuse the blister shells together to form double-blister packaging. Ultrasonic Sealing: A blister packaging process. An ultrasonic machine is used to generate ultrasonic waves to bond the blister shells together to form double-blister packaging. Different from high-frequency sealing, ultrasonic can not only seal PVC and PETG materials, but also PET materials, and it has no electromagnetic damage to the packaged products, making it especially suitable for packaging electronic products. The disadvantage is that ultrasonic edge sealing can only be intermittent dots, and generally only one edge is sealed at a time.