Aluminum foil bag packaging usually refers to aluminum-plastic composite vacuum packaging bags, which are suitable for moisture-proof, light-proof and vacuum packaging of large-scale precision machinery and equipment, chemical raw materials, and pharmaceutical intermediates. Mostly adopt three-layer or four-layer structure, which has good water and oxygen barrier functions. Unrestricted, packaging bags of different specifications and styles can be customized, and can be made into flat pockets, three-dimensional bags, organ bags, zipper bags and other styles. The products must be tested by GB and ASTM standards, and the products meet the requirements of environmental protection (third-party test reports can be provided), and the products meet the most stringent environmental protection standards for packaging materials in the European Union and North America. [Aluminum foil packaging bags] Aluminum foil bags are divided into pure aluminum bags and aluminum-plated bags. How to distinguish between aluminum-plated bags and pure aluminum bags in daily life? There are a few points to summarize: 1. From the material point of view, pure Aluminum bags are pure aluminum with high purity and are soft materials; aluminum-plated bags are mixed with composite bags materials and are brittle materials. Second, in terms of cost, the price of pure aluminum bags is higher than that of aluminum-plated bags. 3. In terms of performance, the moisture-proof and cooling effect of pure aluminum bags is better than that of aluminum-plated bags. Fourth, in terms of use, pure aluminum bags are more suitable for vacuuming, such as cooked food, meat and other products, while aluminum-plated bags are suitable for tea, powder, electronic parts, etc. 5. Expose the inside of the bag to the light or sunlight. The light that can be seen through the bag is aluminized foil, and the invisible is pure aluminum foil. food bags, food packaging bags