Aluminum foil is a packaging material that has not yet been replaced. It has multiple advantages such as non toxicity, thermal conductivity, light shielding, and moisture resistance, making it widely used. However, there are still many considerations for the practical application of aluminum foil.
The comprehensive knowledge of aluminum foil application is enough to read this article. Aluminum foil is made by using electrolytic aluminum with a purity of over 99.5% and pressing it. It has a shiny metallic luster, is non-toxic, odorless, has good light blocking properties, and can reflect up to 95% light. It is stable at high and low temperatures, and does not shrink or deform at temperatures of 73-371 ℃. It has good barrier properties, moisture resistance, breathability, fragrance retention, moisture resistance, and oxygen resistance, making it an excellent intermediate substrate thin film for steaming and cooking packaging.
Aluminum foil is commonly used for packaging drugs and bubble wrap, moisture-proof and fragrance preserving paper for cigarettes, packaging chocolate, anti leakage packaging for daily chemical products, sealing film for instant noodle bowls, sealing trademarks for beer and champagne, composite packaging for milk and dairy products, as well as fruit juice, and so on.
Aluminum foil is widely used in flexible packaging because of its low strength and simple breakage at the beginning of folding. So it is rarely used alone. Generally, composite packaging materials are made with paper, glass paper, and polyethylene film. During the composite process, adhesive bonding, dry bonding, extrusion bonding, and extrusion bonding are selected based on different types of adhesives to compensate for their simple cracking, lack of flexibility, and absence of thermal adhesives.
