The aluminum-plastic composite board is made up of multi-layer materials. The upper and lower layers are high-purity aluminum alloy plates, and the middle is non-toxic low-density polyethylene core board PE. The front side is  pasted with a protective film. So what are the requirements for aluminum alloy panels?

The material properties of the curtain wall aluminum panel shall meet the requirements of GB/T3880.2 for 3 x x series, 5 x x series or other series of aluminum alloys with better corrosion resistance and mechanical properties.

Aluminum shall be cleaned and chemically pretreated to remove oil, dirt and loose oxide layers naturally formed by contact with air, and to form a chemical conversion film to facilitate solid bonding of aluminum to coating and core layers.

The fascia board coating material should be made of fluorocarbon resin with excellent weather resistance, or other materials with comparable or superior properties.

The above is the requirement of aluminum composite panel for aluminum alloy sheet.