·Packaging box function: Ensure the safety of products during transportation, improve the quality of products, etc. The main material of iron boxes and cans: tinplate.·Protect display products. It is now widely used in electronics, food, beverages, alcohol, tea, cigarettes, medicine, health products, cosmetics, small household appliances, clothing, toys, sporting goods and other industries and product packaging supporting industries. It is an indispensable industry.