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The barrier properties of packaging containers to air and other volatile gases are very important for the preservation of nutritional content and sensory quality. Comparison of various juice packaging containers proves that the oxygen permeability of the container directly affects the browning of the juice and the preservation of vitamin C; the preservation of vitamin C in metal cans, glass bottles, aluminum foil laminates, and cartons with low oxygen permeability Better, of which printed tinplate sheet tin cans are the best.

Electrolytic tinplate coil is referred to as tin sheet metal, commonly known as tin coating. It is a low-carbon thin s tin sheet metal with tin on both sides, with a thickness of about 0.15 to 0.40 mm. Among them, metal tin has the characteristics of non-toxic, odorless, soft, etc., and adheres to the steel substrate, so that the steel substrate has good welding and processing properties.

Tinplate coil need to be coated with a certain gold lacquer coating on the inner surface, in order to prevent the chemical interaction between the filling in the tank and the tank wall and the contamination of the filler by trace elements, It's time to protect the quality of the filler. The packaged product can be stored, transported and sold for a long time without affecting the use value of the product.