The characteristics of the aluminum plating film and the application

Aluminum plating film are the main features of high strength, good heat resistance and chemical resistance, good processing and anti-aging performance, appropriate corona treatment, the aluminum layer and film adhesion stronger. Used for aluminum plating, which can be widely used for packing tea, milk powder, candy, biscuit, etc, also can be used as decorative membrane such as into handicraft, the Christmas tree. At the same time also applies to composite or paperboard composite printing. Conventional standard thickness of the 12 microns, 16 microns, 25 microns, 36 mu m. The most used aluminum plating film mainly include polyester aluminum plating film ( VMPET） And the CPP aluminum plating film ( VMCPP) 。 VMPET three layer structure is mainly used for composite, VMCPP is mainly used for composite layer structure. Aluminum plating film has both the characteristic of plastic film, also has the characteristics of the metal. The role of the aluminum plating thin film surface is shading, prevent ultraviolet irradiation, extend the shelf life of the contents, and improve the brightness of the film, from a certain extent, instead of the aluminum foil, also has a low price, beautiful and good barrier properties, therefore, aluminum plating film application is very extensive in composite packaging. Material is a great variety of thin film, and moreover, because of this film to enhance family energy, commodities in agriculture, industry, medicine industry, construction industry, such as use is common, high-end fields such as water treatment, solar power, battery diaphragm, bullet-proof glass manufacturing also has its place. Aluminum plating film is on the base material vacuum evaporation a layer of thin, About 300 nm or so) The aluminum layer. Is generally not used for cooking sterilization bags. There are two reasons: 1 general aluminum plating film can't bear the temperature of the high-temperature sterilization, aluminized layer occurs at high temperature oxidation were black. 2 aluminum plating film adhesion is very poor, peel strength can not meet the requirement of the retort pouch. Over the years, aluminum composite plating aluminum layer transfer without a prescription to solve, each manufacturer are, on the basis of operation technical personnel experience by different way. In general, to improve the aluminum plating film composite should pay attention to the following aspects: 1. Choose qualified aluminum plating film, vacuum aluminum plating film base film paper is important, if the base film corona treatment of solid is low, the binding force of aluminum powder and basement membrane is poor. So it is best to use metal aluminum plating film production. At the same time in front of the computer, can use transparent tape to aluminum plating film aluminum adhesion test summary. 2. Choose the suitable ratio of adhesive and correct. A variety of adhesive on the market, mainly used in plating aluminum composite adhesives are: acetate soluble polyurethane, alcohol soluble polyurethane, water-based compound glue. In the selection of ester, soluble polyurethane adhesives (Suggestions to choose moderate molecular weight adhesives As some of the brand aluminum plating film special glue) , can consider to reduce the curing dose at the same time, also can choose to use alcohol soluble polyurethane bicomponent composite adhesive, these two kinds of bi-component comparison, the latter is not easy to transfer aluminum layer. 3. Composite operation process. When aluminum composite plating, hot blast temperature not too high, the best control in 50 ℃ or lower. 4. Aluminized composite curing temperature not too high, general control in 45 ℃ ~ 50 ℃, otherwise the aluminum layer is easy to move, ripening time had better not exceed 24 hours.