Food safety is a crucial consideration in the packaging industry. Tinplate cans have proven themselves to be extremely safe as food packaging materials over many years.
Tinplate packaging cans are widely used for beverages and liquid foods, especially products that require a good seal, such as carbonated beverages and beer.
Tinplate packaging cans are not suitable for packaging foods with high acidity or high salt content, such as ketchup, fruit vinegar, and preserved foods.
Metal tin (Sn) is a soft silver-white metal at room temperature with good ductility and chemical stability. Its resistivity is about 1.09×10−7Ω⋅m, which is slightly higher than copper and silver, but still in the range of typical metal conductors. The presence of tin will not only not weaken the conductivity of the steel plate, but also protect the continuity of the conductive layer due to its uniform coverage.
Tinplate packaging cans have extremely strong pressure resistance and impact resistance. This structural strength can effectively prevent deformation and cracking during food transportation, stacking and handling, thereby protecting the internal food from external damage.
From the perspective of recycling, tinplate sheet has a high reuse value. Its iron-based material can be melted and reprocessed, and the tin layer can also be effectively recycled. Compared with other metal materials, tinplate sheet has higher economic and environmental benefits in the recycling process.
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Tinplate packaging cans can effectively isolate air, moisture, light and harmful substances, and prevent oxygen from entering the can. Oxygen is the main factor causing coffee oxidation and flavor loss, and being able to prevent the entry of oxygen directly affects the shelf life of coffee.
Compared with paper packaging, tinplate packaging has superior hardness and durability. In food packaging that needs to be stored for a long time, tinplate's ability to resist compression and mechanical damage is particularly outstanding.
The price of customized tinplate packaging cans is usually higher than wholesale packaging because it involves more design and production processes. Customized packaging requires a series of designs and productions according to the specific needs of customers, and the production quantity is usually small, so the unit cost is high.
The smelting of steel requires a lot of energy and emits a certain amount of greenhouse gases such as carbon dioxide. Chemical substances are also used in the tin plating process. Therefore, in the production stage, the impact of tinplate on the environment is mainly concentrated on resource consumption and pollutant emissions.
