Aluminum foil can be divided into industrial aluminum foil and foil packaging. Industrial chemical composition of pure aluminum foil, having a thickness of 0.005 to 0.2 mm, mainly used as a capacitor, a heat insulating material, a moisture-proof material for an electric and electronic industries and the like. Packaging foil thickness is 0.007 to 0.1 mm, flat foil, foil printing, coating and laminating aluminum foil color printing and other products, mainly used as food, tea, cigarettes and other packaging materials.

The minimum thickness of aluminum foil tape production produced up to 0.0025 mm, width up to 1800 mm. None foil rolling roll gap rolling, roll always in the elastic collapsed state. To achieve the foil thickness is controlled by adjusting the rolling force, rolling speed and tension control during rolling. When rough rolling, rolling force control using foil thickness; when finishing, the thickness of the foil rolling speed increases and thinning; tension greater thickness is also smaller; in order to prevent the fragments, tension selection is often a foil conditions σ0.2 material yield strength of 0.2 to 0.4.

Low rolling often adding "thick oil" or "thin oil" in the oil adjust the thickness of the aluminum foil rolling. Lubricants and roll state has a very important influence on the foil quality. Aluminum foil stock from cold rolled aluminum coils, usually after 340 ~ 480 ℃ annealing in advance, having a thickness of 0.4 to 0.7 mm. Rolling pass deformation rate of about 50%, of the total deformation rate of more than 95%. Finished thickness less than 0.01 to 0.02 mm foil should be co-volume, double sheet Roll.