The tensile strength and elongation of aluminum foil for batteries are the mechanical property indexes that need to be concerned about, the higher the tensile strength, the better, the elongation is within 5%, the higher the better.
Surface wetting tension. This indicator is described by the mechanical unit "dyn" (i.e., dyn), the general user requirements for surface wetting tension in the 30-32dyn, part of the sensitive materials on the dyn value of the requirements of a higher.
8021 Alloy Aluminum Foil Specifications
| product | type | temper | Thickness(mm) | Width(mm) |
| 8021 battery case foil | polished,bare | O/HX2 HX4 | 0.036-0.055 | 200-1600 |
| 8021 Packaging Foil | O H22/H24 | 0.016-0.2 | 150-1600 | |
| 8021 Medicinal foil | H14/H18 | 0.018-0.2 | 200-1600 |
Chemical composition
| Si | Cu | Mg | Zn | Mn | Cr | Fe | Ti | Other | Other total | Al |
| ≤ 0.5-0.9 | ≤ 0.1 | ≤ 0.05 | ≤ 0.1 | ≤ 0.2 | ≤ 0.05 | ≤ 0.6-1.0 | ≤ 0.08 | ≤ 0.05 | ≤ 0.15 | remainder |
End face quality. That is, the cutting quality of the aluminum foil edge, the edge can not exist V-shaped notch, burr, aluminum wire and other defects.
