Although aluminum has more reserves in the earth’s crust than iron, the production process of aluminum is much more complex than iron. Aluminum is a more active metal element. Smelting needs to be through electrolysis. Aluminum cannot be reduced with carbon, but iron can be reduced with carbon. The cost of carbothermal reduction is significantly lower than that of electrolysis, which is very electricity consuming, so the cost consumed in the whole production process is higher than that of iron. Therefore, the cost of aluminum is obviously higher than that of iron, so it is expensive, so the price of aluminum is higher than that of iron.
On the market, Wang Laoji, Babao porridge and Red Bull use relatively hard iron cans because the packaged materials have no pressure and are easy to deform with aluminum cans. Iron cans are also called three piece cans in the industry. The production process of iron three piece cans is mostly flat printing, then cutting and welding into a circle. First, the top or bottom cover is equipped in the can factory, and then the corresponding bottom or top cover is equipped after filling.
Aluminum cans have the advantages of not easy to break, light weight and light tightness. The general carbonated drinks (coke, beer, etc.) on the market use aluminum cans because aluminum cans are not easy to be corroded by acid, and aluminum cans are easy to form, and the manufacturing cost is relatively low. The pressure in the steam water is greater than that under normal pressure. Under the action of pressure, there is no need to worry about deformation. Moreover, the aluminum tank can ensure the pressure of carbon dioxide in the steam water and make the steam water achieve better taste effect. Therefore, a strong and durable aluminum can is needed to prevent deformation during transportation and storage. Aluminum cans use not pure aluminum, but aluminum alloy. Most of the domestic processes are made of aluminum roll stamping, roller printing and easy pull lid. It is also called two-piece can in the industry.
Although the price of aluminum is relatively high, replacing aluminum cans saves costs. One is that aluminum cans are lighter than iron cans, so the cost of a single can decreases. The second is that aluminum cans are two-piece cans and iron cans are three-piece cans. Aluminum cans also save costs in technology. As for selling waste products, aluminum cans are more valuable than iron cans because aluminum cans are easy to recycle, while iron cans are tinplate with a layer of tin. Generally, small factories have not recycled that process.
More and more consumers are worried about the impact of PET plastic bottles on the environment. At the same time, the scientific community and environmentalists are paying more and more attention to PET bottled water. The launch of pop can packaging coincides with the time, and 100% can be recycled again.