Aluminum foil is aluminum made from thin metal foil. Foil is flexible and can be easily bent or wrapped around objects. Thin foil is fragile and is sometimes laminated with other materials such as plastic or paper to make it stronger and more useful.
Aluminum foil replaced tin foil in the mid-20th century. In the UK and US it is often informally referred to as "tinfoil", just as steel cans are often still referred to as "tin cans". Metalized film is sometimes mistaken for aluminum foil, but is actually a polymer film coated with a thin layer of aluminum.
Aluminum foil is made from electrolytic aluminum with a purity of 99.0%-99.7%, which is produced through multiple rolling processes. This soft metal film is not only moisture-proof, airtight, and light-shielding, but also has the advantages of fragrance retention and odorlessness. This is the practical application of aluminum foil. On the one hand, it also has an elegant silver-white luster, and people can give full play to their imagination and print beautiful patterns and patterns with unique characteristics and colorful colors on it.
Precisely because it is practical and colorful, aluminum foil packaging is becoming more and more popular among people, and the market space is huge.
Advantages of aluminum foil: Aluminum foil has a shiny metallic luster and is highly decorative; tasteless and odorless; relatively light in weight, with a specific gravity of only one-third that of iron, copper, etc., rich in extensibility, thin in thickness, and small in weight per unit area; It has good light-shielding properties, with a reflectivity of up to 95%; it has strong protective properties, making the packaging less susceptible to bacteria, fungi and insects; it is stable at high and low temperatures and does not expand, contract or deform at temperatures between -73 and 371°C; and has good barrier properties. , moisture-proof, air-tight, fragrance-preserving, can prevent moisture absorption, oxidation and volatilization deterioration of the packaging contents, and its moisture-blocking and oxygen-blocking properties. Aluminum foil is easy to process and can be compounded with various plastic films and papers.
Disadvantages of aluminum foil: low strength, easy to tear, and cannot be used alone to package products. It is easy to break when folded, causing holes, and is not resistant to acid and alkali.
