The raw materials of aluminum foil for food packaging are mainly 1xxx, 3xxx and 8xxx alloy, including 1060, 1100, 3003, 8011, 8021, etc. According to the requirements of the packaged food, the degree of softness and hardness of the alloy is selected. The common tempers are H14, H16 and H18.
The food container aluminum foil is 8011 or 3003 aluminium foil. 3003 aluminum foil has good punching performance. Due to the high content of Mn element in the alloy, the grains are easy to grow during homogenization annealing. When rolling to the thickness of the finished product (0.03-0.08mm), coarse grain stripes will inevitably appear on the surface, which will affect the normal use of customers.
On the other hand, due to the characteristics of the 3003 alloy itself, the strength of the material is high, and the loss of rolling equipment and punching equipment is relatively large. At the same time, a large amount of copper and manganese metals need to be added, which increases the production cost of the aluminum foil manufacturers.
8011 aluminum foil can overcome some shortcomings of 3003 alloy, but because the content of alloy elements in 8011 alloy is low, it is soft and not suitable for high-speed punching, and the punching depth is insufficient. Its application range is limited.
Compared with 8011 aluminum foil, the tensile strength of 8006 aluminum foil is higher, which can reach 125-135. At the same time, the cupping value and elongation of 8006 aluminum foil are much higher than that of 8011 aluminum foil. More importantly, 8006 aluminum foil is produced by hot rolling process. After stamping, the edge has no wrinkles and has a beautiful appearance. It is widely used in aircraft food container in Europe.
8006 alloy contains Mn element, which is especially beneficial to the corrosion resistance of aluminum foil. 8006 alloy has better mechanical properties than 8011, 8079, and 1235 alloys. The research results show that 8006 alloy has good surface quality and extremely low number of pinholes.
8006 aluminum foil is an aluminum alloy that contains elements such as silicon, iron, manganese and copper. It has a range of advantages that make it one of the most versatile alloys. Due to its high strength, 8006 aluminum is widely used in structural applications such as automotive parts, marine components and bridges. Its strong yet lightweight properties also make 8006 aluminum ideal for engine blocks and aircraft construction.
In addition, its excellent thermal conductivity means that it is also widely used in food container, bottle cap foil,air duct foil, packaging foil, pharmaceutical foil, household foil, air conditioner foil, cable foil, cigarette foil, heat sealing foil,etc.