The gas is what gives soda its fizz and that tingly feeling when you drink it. Yes We Can! The inside of the cans are thoroughly cleaned, dried, and coated with a special material.
This coating helps keep the acid in the soda from having a chemical reaction with the aluminum. If a can has any little dent or imperfection, it is rejected and recycled.
Quality Control. Sweeters are from different types of sugar. Both the sugar and the flavoring are tested many times to be sure they are just right.
Wonderful Water. Different chemicals are added to the water to remove any tiny particles plus kill any bacteria that might be in it.
The water is also run through a series of special filters to make sure it is ready for the next step in the soda-making process. Mix it Up! Next, just the right amount of syrup is added to the water to create the soda mixture. The soda is now ready except for one important ingredient Most fizzy drinks contain phosphoric acid and citric acid, giving them an average pH of 2.
Every soda can has a hidden liner inside to prevent the beverage from reacting with the metal. Soda cans are made of aluminium. There are several factors that must also be considered when manufacturing these crucial liners. Protective liners are not restricted to the soda can. They are an important part of nearly every canned food product.
So why does it have the potential to be more harmful to us than the drink itself? This fascinating video explains how aluminium soda cans are made from thin sheets of rolled aluminium through to the final product:. While this makes a tenacious coating, BPA has a notorious reputation.
BPA has the ability to mimic natural hormones in the body. In this way, it has been classified as an endocrine disruptor. It enters the body by transferring into the soda, which we then drink. This means that BPA actually interferes with our hormonal system by altering or breaking down the production of hormones.
The protective liner inside soda cans contains BPA. While this is a dangerous compound that can disrupt hormone production, its dose in canned food and drink is nowhere near high enough to be considered harmful. Hormones are an integral part of our biology. They are produced and stored in the endocrine system, a chemical messenger system that includes but is not limited to :.
By circulating hormones through the body, the endocrine system affects nearly every organ and cell. It is responsible for a range of important processes, including:. Filling cans Cans are filled before the top is crimped on. The key engineering issue is that can walls are about 90 micrometers thick[citation needed], so empty cans are light, weak, and easy to damage.
The filling and sealing operations need to be extremely fast and precise. The filling head centers the can using gas pressure, purges the air, and lets the beverage flow down the sides of the can. The lid is placed on the can, then crimped in two operations. A seaming head engages the lid from above while a seaming roller to the side curls the edge of the lid around the edge of the can body.
The head and roller spin the can in a complete circle to seal all the way around. Then a pressure roller with a different profile drives the two edges together under pressure to make a gas-tight seal.
Filled cans usually have pressurized gas inside, which makes them stiff enough for easy handling. A few more mins googling would have helped me there wouldnt it. TonyHetherington 32, posts months. They freeze a block of coke, frozen exactly in the same of the inside of a can of coke. Then, they roll this block of frozen coke in a vat of liquid aluminium. They have to do it quickly, otherwise the coke melts.
0コメント