The main component of tinplate cans is steel, on which a thin layer of tin is coated to prevent rust and corrosion. Aluminum cans are made entirely of aluminum, a lightweight metal with a density of about one-third that of steel.
The tinplate layer on the surface of tinplate sheet has good chemical stability and usually does not react chemically with food or beverages. This is because tin has extremely low reactivity at room temperature and is not easy to react with acids and alkalis, so it is widely used in food packaging.
Tinplate containers, in simple terms, are packaging or storage containers of various shapes made of tinplate. This type of container is made of tinplate as the main material and is made through a series of stamping, cutting, welding and forming processes.
Reasons why tinplate sheet can be used as food packaging material:
1. Anti-corrosion performance
2. Mechanical strength and durability
3. Good sealing
4. Food safety
5. Good processability and decorativeness
6. Recyclable and environmentally friendly characteristics
if the food in the can is highly acidic or the food is stored for too long, in some extreme cases, tin may dissolve in trace amounts. Even so, the amount of tin dissolved is usually very small and not enough to pose a threat to human health.
Food itself has certain nutrients and moisture, which are the basic conditions for the production and reproduction of bacteria, mold, and yeast. When the food is stored at a temperature suitable for their reproduction, it will cause food to deteriorate. If food is packaged in aseptic packaging or after high temperature sterilization, refrigeration, etc., it will prevent the occurrence of food spoilage and prolong the shelf life of food.
