Biscuits tend to soften due to moisture, and the material and structural design of tinplate cans can reduce moisture penetration to a certain extent. The tin coating not only prevents corrosion, but also blocks some moisture, slowing down the effect of moisture on the biscuits in the can.

Tinplate is a composite material with a layer of tin on the surface of low-carbon steel. It has the strength of steel and the corrosion resistance of tin, so it is widely used in packaging in the fields of food, chemicals, cosmetics, etc.

The anti-rust performance of tinplate depends first on the quality and thickness of its tin plating. During the production process, the thickness of the tin layer is generally controlled in the range of 1.5g/m² to 15g/m², depending on the purpose of the can and the acidity and alkalinity of the food.

Aerosol cans must withstand internal gas pressure, and the strength of the material is crucial. The basis of tinplate sheet is steel, which itself has high strength and rigidity and can withstand large external impacts and internal pressure.

Generally speaking, the shelf life of canned food ranges from 1 to 5 years, and the role of tinplate cans is to protect the food from the influence of the external environment during this shelf life and maintain the flavor and safety of the food.