The blister box is a blister. Strictly speaking, it is just one type of blister: it is formed into a plastic box shape by sheet blister and the lid is connected to the container. Made of PS, there are also separate lids and bottoms. Different materials can be used. Japanese fast food boxes with black PS at the bottom and cover with transparent PET.
The usual PS plastic tray is an amorphous random polymer with excellent thermal insulation, insulation and transparency. The long-term use temperature is 0-70°C, but it is brittle and easy to crack at low temperature. There are also isotactic and syndiotactic polystyrene. Identical polymers have a high degree of crystallinity. Ordinary polystyrene resin is an amorphous polymer, the polystyrene macromolecule chain has a benzene ring, and the random arrangement of the bulky side group of the benzene ring determines the physical and chemical properties of the polystyrene, such as high transparency High rigidity, high glass transition temperature, brittleness, etc. The expandable polystyrene is made by impregnating a low-boiling physical foaming agent in ordinary polystyrene and foamed during processing to produce a foamed plastic product. High-impact polystyrene is a copolymer of styrene and butadiene. Butadiene is a dispersed phase and increases the impact strength of the material, but the product is opaque. Syndiotactic polystyrene is a syndiotactic structure and is produced using a metallocene catalyst. It is a new type of polystyrene that has been developed in recent years by plastics companies. Its performance is good and it belongs to engineering plastics.
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PET hard film has good toughness and is a new type of material developed in recent years. With its excellent toughness, high strength, high transparency, and renewable recycling, easy to burn, no harmful gases when burning, it belongs to environmental protection materials and gradually banned PVC, but the price is high. Blister box is mainly used for electronics, food, toys, box window, collar care, footwear packaging. It is suitable for high-grade plastic products. The blister blister of European countries and the United States generally requires the use of PET materials, but its high thermal melting point makes it difficult to package high-frequency packages. In order to solve this problem, people have a complex on the PET surface. Layer PVC film, named PETG, but the price is higher.
PVC sheet is a widely used and popular material, PVC film can be divided into two kinds of environmental protection and environmental protection, can be made of transparent, color, anti-static, gold-plated, flocking and other plastic boxes, its characteristics Mainly high transparency, good surface gloss, small crystal point, small water mark, wide application, high impact resistance, and easy molding. PVC sheet has high toughness, is not easy to burn, and chlorine is generated when it is burned, which has certain impact on the environment. PVC is easy to heat, can use sealing machine and high-frequency edge sealing, is the main raw material of the plastic production company to produce transparent plastic products. Products are widely used in toys, food, electronic products, medicine, electrical appliances, gifts, cosmetics, stationery and other product packaging.
Chemical properties: The chemical stability of the PS plastic tray is relatively poor. It can be dissolved by various organic solvents (such as: aromatic hydrocarbons, halogenated hydrocarbons, etc.), it will be corroded by strong acid and alkali, and it is not resistant to grease. It is easy to be exposed to ultraviolet light. Discoloration. When burning, it will produce a large amount of carbon monoxide or carbon dioxide, taking care to prevent poisoning Physical properties: PS plastic disc texture is hard and brittle, colorless and transparent, and can be mixed with a variety of dyes to produce different colors.
PS hard film has low density, poor toughness, and is easy to burn. When it is burned, it will produce styrene gas (which is a harmful gas), so it is generally used to produce various industrial plastic trays. PS sheet is a new type of environmental protection packaging material developed in recent years. With its excellent thermoforming performance, good environmental performance and sanitary performance, it is widely used in medicine, food, toys and electronics.