How to check whether the vacuum packaging bag is qualified
1, Inspection of raw materials:a. Thickness of film (aluminum foil) (pressGB 6672progress), tensile strength&Elongation(according toGB 13022-91conduct), wetting tension(according toGB 10003-88conduct), oxygen permeable/moisture permeability(according toGB1038/ 1037conduct), high temperature resistance, hygienic suitability(meets theGB-9687-88), the appearance of vacuum packaging bags;b.High temperature resistance of adhesives and inks, food hygiene suitability.2,Inspection of film (aluminum foil) lamination process:a.Exterior(Visually no obvious defects […]