... of impurities and without wrinkles and piebaldKind: Single-sided aluminum foil, double-sided aluminum foil, colored foil, aluminum composite belt, PET polyester tapeThickness: 20um (Accordance ... CM≥18Heat sealing shear strength/Destroying the bond between the aluminum pull off the plastic layer and strip the plastic ... performance 0.1mol/L,Hcl,480hclassgrade 7 hangzhou dinghe aluminum foil film roll