What is the difference between vacuum aluminum foil bags and ordinary packaging bags, and what are the advantages? First of all, vacuum aluminum foil bags are usually used in food packaging. Vacuum aluminum foil bags can be divided into three-side sealing bags, middle sealing bags, three-dimensional middle sealing bags and sheet materials according to the bag making method. The three-side sealing aluminum foil bag is sealed around the packaging bag. The front and back dimensions are the finished product size, with a certain sense of integrity, the design is not constrained, and the front and rear designs have a certain coherence. Since the dimensions of the front and back are the same, the front can be designed first so that the back echoes the front. When making plates, the front and back should be arranged on the same set of plate cylinders. The middle-sealed bag is sealed on the back, the front size is the finished product size, the back is divided into two equal parts, and the sum of their widths is equal to the width of the front, usually in the design, the front and the back are unfolded to carry out integrated design, and left and right. Add 1cm to each edge, and the front and back are also on the same set of rollers. The three-dimensional middle-sealing bag is based on the middle bottom seal, and three-dimensional edges are added on both sides, and the front, back and side three sides are also on the same set of rollers. Due to the limitation of printing materials, the front and back sides of the sheet must be designed separately and plate-making separately, and cannot appear on the same set of plate cylinders at the same time. Vacuum aluminum foil bags are now widely used in electronics, food, beverages, alcohol, tea, cigarettes, medicine, health products, cosmetics, small household appliances, clothing, toys, sporting goods and other industries and product packaging supporting industries. Missing product.