Oil
Oil refers to the outer foil after rolling to bring the remaining oil, the oil that is in addition to the rolling oil film. These oils are usually below the rejection by the neck or on a roll mill outlet, splash, drop in the foil surface, and dirty, messy ingredients. Appearance with aluminum foil rolling oil than other materials with greater pollution damage, first, because most of the finished product as a decoration or aluminum foil packaging materials must have a clean appearance(aluminum foil tape); second, it is thin, when, after annealing easy to constitute bubbly, and because oil constitutes more excessive amount of residue in the area affected by the use.(aluminum foil tape) How much oil is one drawback to assess the quality of the aluminum foil is very important indicator.
Wrinkling
Because severe bad flatness, when aluminum foil or open wound would constitute wrinkles, the nature of the lack of tension so that the foil surface leveled. (aluminum foil tape)About Zhang Liwei 20MPa equipment, plate-shaped foil surface shall not exceed 30I, when more than 30I, the inevitable wrinkling. Because the rolling of aluminum foil generally accepted greater than the subsequent processing of tension, some rolling just showed bad shape, including roll grinding is not correct, not bad roll, the incoming plate-shaped and plate-shaped adjustment incorrect.