Aluminum foil is a kind of metal sheet made of high-quality pure aluminum or aluminum alloy material, which is continuously rolled and stretched, with less pinhole and excellent mechanical properties, and is widely used in the fields of food packaging, medicine, electronic products, construction, etc. It has the characteristics of thinness, softness, corrosion-resistance, non-toxicity and tastelessness, moisture-proofing, air-tightness, light-shading, heat-conducting, and abrasion-resistance.