In the pillow packaging machine packaging industry, older children use metal packaging containers, which are one of the main packaging materials. The United States' packaging consumption of metal materials is second only to paper, and Japan and European countries are second to paper and plastics, occupying the third place. my country occupies the fourth place. Among the metal materials for packaging are mainly low-carbon steel sheets and aluminum sheets and foils.
Mainly used as packaging materials:
1. Nian galvanized sheet steel, also called tinplate. It is hot-dip galvanized on the pickled thin steel plate, so that the surface of the steel plate is coated with a zinc protective layer with a thickness of more than 0,02 mm, which improves the corrosion resistance of the steel plate. It is used to make metal packaging containers.
2. Tinplate, also called tinplate. It is coated with a corrosion-resistant tin layer on a thin steel plate, and then undergoes reflow and passivation treatment to improve corrosion resistance, has a certain strength, is easy to process and shape, can be brazed, can be used for paint printing, and has a bright appearance. A large amount of them are used as packaging materials, and they are widely used in the food industry. my country's current output is small and cannot meet the needs.
3. Aluminum foil, which is made of electrolytic aluminum with a purity of 99.5% or more, is made by calendering, and the thickness is less than 0.2 mm. Generally, aluminum foil for packaging is used in combination with other materials as a barrier layer to improve insulation performance.