We now use metal cans for food and drink. Metal cans are commonly referred to as easy to pull cans, and their lids and bodies are produced separately before being assembled together. When used in many packaging applications, strong internal pressure compensates for the rigidity of the thin can walls. However, the high gas resistance, shading, and sealing properties of metal cans help maintain stable quality of the food inside. What other advantages are there? Let's take a look together.
The advantages of this metal jar are obvious. It has excellent airtightness and can withstand high internal pressure, making it very suitable for loading carbonated beverages, which only require a small amount of pressure, air, and acid resistance. For fruit and vegetable juices, organic acids are an important component that determines their taste and can display the unique aroma of fruits. The sugar acid content ratio in fruit and vegetable juices is an important factor affecting their taste, but organic acids also have a certain degree of corrosiveness. In addition, The enzymes, vitamin C, pigments, and other important components in fruit and vegetable juice all have certain requirements for light and temperature. However, metal cans are made of tin three piece cans and aluminum two piece cans, and are also coated with epoxy phenolic type coatings (sometimes requiring an additional layer of ethylene based coating on the epoxy phenolic type inner coating). As a result, the organic acids in fruit and vegetable juice are not a threat at all.