The main materials include tin plated steel sheet (tinplate), chrome plated steel sheet, etc. Tinplate is a commonly used material for three piece cans due to its corrosion resistance, ease of welding, and good sealing performance. Chrome plated thin steel plates are mostly used for packaging products with less corrosiveness.
The main process flow includes cutting boards, rolling iron into circles, positioning welding, internal and external coating of welds, drying, flanging, sealing, leak detection, etc. Some processes can be selected and configured according to the needs of the tank type.
The main material is food grade metal, without the risk of harmful substances such as plasticizers and bisphenol A migrating, and the metal recovery rate exceeds 90% (far higher than the 30% of plastics), which is in line with the global "plastic reduction" and "circular economy" policies.
The can body can be directly printed with high-definition patterns without the need for additional labels, reducing packaging waste and making it more popular among environmentally conscious consumers.
The material utilization rate of three piece cans is high (with less waste in sheet cutting), and the equipment investment is lower than that of two piece can production lines. Therefore, in large packaging (2L or more) and low gross profit fast-moving consumer goods (such as affordable cans and barrel coatings), the cost advantage is obvious.