Now the plastic bags are gone, white pollution!

Now the plastic bags are gone, white pollution! Is tinplate OK? This is a milestone revolution in canning production. In the days when tinplate did not appear before, canned food is a luxury that the rich can afford! The expensive packaging makes it difficult to enter ordinary people's homes. But the appearance of tinplate completely changed this situation! Tinplate is a common name for electroplated tin plate. With the continuous improvement of people, tinplate combines the high strength and formability of steel or iron with the corrosion resistance, solderability and beautiful appearance of tin. Thereby creating a corrosion-resistant, non-toxic, high-strength, opaque, and good anti-corrosion, food packaging materials! Although tinplate was renamed tinplate at the 1973 China Tinplate Conference. But compared to the latter, tinplate, which sounds rustic, is more popular! Tinplate originated in Bohemia, and it is said that it was invented by the British. However, since the beginning of the 14th century, Bohemian began mass production of this tinplate, which made Bohemian become the main source of tinplate at that time or even now! Now more than one-third of the tin element produced in the world is used for tinplate production. Tinned tin cans have the following advantages: 1. Opaque In addition to causing food degradation reactions, light also causes changes in proteins and amino acids. Vitamin C is more likely to interact with other food ingredients when exposed to light, resulting in a large amount of loss. According to research and analysis, the loss of vitamin C in milk in clear glass bottles is 14 times higher than that in dark bottles. Light will also cause oxidative odor in milk, as well as cracking of nuclides and methionine, which will lose nutritional value The opaqueness of tinplate can make vitamin C have the highest preservation rate. 2. Anti-oxidation of tin Tin on the inner wall of tinplate will interact with the oxygen remaining in the container during filling, reducing the chance of food ingredients being oxidized. The reduction effect of tin has a good preservation effect on the flavor and color of light-colored fruits and juices. Therefore, juice jars using unpainted iron cans are better in nutrient preservation than those in other packaging materials, and the brown color changes slightly. The acceptance of flavor quality is better and the shelf life is extended. 3. Good sealing The barrier of packaging containers to air and other volatile gases is very important for the preservation of nutrients and sensory qualities. Comparison of various fruit juice packaging containers proves that the oxygen permeability of the container directly affects the browning of the juice and the preservation of vitamin C; the metal cans, glass bottles and aluminum foil laminates with low oxygen permeability, and the preservation of vitamin C in the carton Better, among which the tin can is the best.