The main reasons for the need for semi-liquid food preservation in iron cans include the sealing, corrosion resistance, high temperature and high pressure resistance characteristics of iron cans, and environmental protection characteristics. ‌

First of all，the tin can is extremely sealed. The sealing technology used in the iron can ensure that the food in the can is completely isolated from the outside environment, thus effectively preventing food contamination.

This is especially important for storing semi-liquid foods that are prone to moisture, keeping food fresh ‌.

Secondly,tin cans have good corrosion resistance. Since semi-liquid food usually contains organic acids and other compounds, these substances will decompose during the sterilization process at high temperature and pressure,

which may exacerbate the corrosion of packaging materials. Iron cans are well resistant to corrosion and can ensure long-term storage of food without damage ‌

In addition, the tin can withstand high temperature and high pressure. In the process of food processing, high temperature and high pressure is an essential link. Iron cans are able to withstand this treatment, ensuring that food is kept in a sterile state, further extending its shelf life ‌.
Finally, the environmental characteristics of iron cans. Iron cans are mainly made of iron sheet, which can be recycled and reused to reduce resource waste. Compared with other single-use plastic packaging, iron cans have a much lower environmental impact and are in line with the concept of sustainable development
Therefore, aluminum cans are mainly carbonated drinks, and other drinks are mostly iron cans.

Aluminum cans are lighter and convenient for storage and transportation, while iron cans are heavy and have high transportation pressure.

So people prefer to use aluminum cans, but aluminum cans are soft and easy to deform, and iron cans are stronger.

Carbonated drinks are breathable and have outward pressure inside the can, which protects the soft aluminum can from being deformed by slight external forces.
Other drinks have no air and use iron cans to better prevent the can from becoming deformed.

In addition, the carbonic acid in carbonated drinks will react slowly with iron, while aluminum can form a dense thin layer on the surface to protect the metal from acid corrosion, which is also an important reason for the use of aluminum cans in carbonated drinks.It’s also important to note that only glass bottles and aluminum cans can keep up the CO2 pressure, and the carbonated beverage companies that use plastic bottles have secretly lowered the CO2 levels, so we tend to find cola from cans to be a little more pleasant than plastic bottles.

Erjin Packaging currently all involved in food and beverage metal packaging cans including (aluminum cans, iron cans, pet can) are available

https://erjinpack.com/