What is Laminated Steel
Because no adhesives and solvents are used in the process of film covering, formaldehyde is not contained, and plastic film can be beautified, decorated, anti-bacterial, anti-dyeing and other treatments to ensure the safety and health of the human body, while playing a role of environmental protection.It is composed of PET, PC, PE or PP film and metal sheet (galvanized sheet, cold rolled sheet, aluminium sheet, stainless steel sheet). The inner side of traditional metal cans must be painted, and the substances contained in the painting method will have harmful effects on human body and environment, especially edible cans. The current treatment method is to use resin to paint the inner wall of cans. However, Bis-phenol A, a harmful substance containing environmental hormones, is an internationally recognized environmental hormone in the coatings used in this process, and the dissolution problem may occur. Once the dissolution exceeds the standard, it will have adverse effects on the human body. And the serious consequences of this problem have aroused attention at home and abroad. The birth of metal sheet coating technology is a revolutionary progress in the production of metal cans. With its wide application, the traditional production process and technology of metal can will be subverted. Productivity, production cost, cleaning and sanitation, environmental protection and other aspects will also make great progress.
Production Technology of Laminated Steel
The composite process of high temperature, high pressure and rapid cooling is adopted in the production of Laminated Steel。
The production line of Laminated Steel is mainly composed of uncoiling part of chromium-plated iron, welding and iron apparent quality inspection, substrate heating, film-cladding unit, cooling unit, product testing and oil-coating coiling, and the core part is the heating area of the substrate and film-cladding unit. The preheating part of the electromagnetic induction heating roller is used to heat the steel strip to the temperature above the melting point of the film, and the hot fusion bonding between the substrate and the film is carried out by the extrusion of two symmetrical pressure cots. The hot-bonded steel strip is cooled rapidly through a cooling device to ensure the rapid recrystallization of molten polymer.
Application Industry of Laminated Steel
1. Application in food metal cans: food cans, beverage cans, four-screw caps, candy cans, tea cans, easy-to-open caps, etc.
2. Applications in chemical tanks: chemical tanks, paint tanks, paint tanks, two aerosol tanks and various top and bottom covers. Especially the technology of blank film processing can be applied to all kinds of three-piece cans.
3. Application in decorative cans: portable ash box, gift box, stationery box, jewelry box, cigarette box, wine box and so on.
4. Applications in other industries: building panels, walls, ceiling, anti-theft doors, floors, shades, etc.
There are many places that can be used in theory, but in fact, the greatest advantage of Laminated Steel is its application in food and beverage cans, especially in two cans. There are also many coated iron three-piece cans in Japan. This is mainly to avoid the TULC technology patent of Dongyang cans, and it has to be done.
At present, the annual consumption of two pieces of cans (steel and aluminium) in China is about 30 billion. With an annual growth rate of 10%, the demand for two cans in China will reach nearly 50 billion in five years, a net increase of 20 billion. With the increasingly stringent requirements of environmental protection and the increasingly scarce resources, recyclable and recyclable metal packaging materials are becoming more and more popular. Therefore, it can be foreseen that the domestic market prospects for the production of two-piece cans with green and environmentally friendly Laminated Steel are very broad.
