Characteristics of aluminum foil bags: The surface of the aluminum foil bag is clean and hygienic, and no microorganisms can grow on its surface. It can come into direct contact with food without any potential health hazards. As an opaque packaging material, it provides excellent protection for products exposed to sunlight, such as oily products, solid drinks, coffee, etc. It is a good packaging material, and aluminum foil bags will not be soaked at high or low temperatures. The air has low water permeability and can effectively protect the interior products. Aluminum foil itself is not volatile, and it and the packaged food will not dry or shrink. The odorless and odorless packaging material will not cause any odor to the packaged food. Stable performance, able to adapt to various high and low temperature environments for storage, and has a certain degree of corrosion resistance.

Why add a layer of pure aluminum foil to the packaging bag? Aluminum foil is also widely used as an isolation layer, heat exchange, and as a conductive material. Usually, the thickness of aluminum foil used for paper wrapped beverage packaging and food packaging bags is only 6.5 microns. This thin aluminum layer can be waterproof, maintain freshness, prevent harmful microorganisms, and prevent dirt. It has the characteristics of opacity, silver white color, anti gloss, good barrier, high/low temperature resistance, oil resistance, heat sealing, anti rotation, fragrance retention, no odor, and softness.

Aluminum coated bags (aluminum coated packaging bags) are decorative materials that are coated with a thin layer of aluminum powder on a plastic film. Aluminum coated packaging bags are also known as aluminum plastic packaging bags. Aluminum foil packaging bag, as the name suggests, is a type of packaging bag with an internal structure containing aluminum foil (pure aluminum). Due to the internal structure containing pure aluminum foil, it is abbreviated as aluminum foil packaging bag, also known as pure aluminum bag or aluminum platinum bag. In fact, aluminum foil bags are made by combining various plastic films and 99.9% pure aluminum layers, and then mechanically sealing and cutting them through bag making. In terms of performance, the cooling effect is better than that of aluminum plated bags. Pure aluminum bags completely avoid light, while aluminum plated bags have a shading effect. From a material perspective, pure aluminum bags are pure aluminum with high purity and belong to soft materials; Aluminum plated bags are made of brittle materials mixed with composite materials. In terms of usage, pure aluminum bags are more suitable for vacuuming, such as filling cooked food, meat, and other products, while aluminum plated bags are suitable for filling tea, powder, and so on. In terms of cost, the unit price of pure aluminum bags is higher than that of aluminum plated bags. When facing the light or sunlight inside the bag, what can be seen through the bag is aluminum foil, while what cannot be seen is pure aluminum foil.

In terms of appearance, the difference between the two is not significant. The same product, placed in aluminum plated packaging, may experience moisture loss and a large number of microorganisms breeding within a month. If placed in an aluminum foil packaging bag, a similar situation may not occur until six months later. In order to ensure the quality of the internal products, many packaging has undergone vacuum treatment. After vacuum treatment, the internal oxygen decreases and there is no environment for microbial growth, thus achieving the protection of the product. Secondly, aluminum foil packaging bags have good stability and generally do not deteriorate due to external environmental influences. From a functional perspective, there is a significant difference between the two. Firstly, aluminum foil bags have a stronger moisture-proof, lightproof, waterproof, and oxidation resistance than aluminum plated packaging bags due to their pure aluminum foil interlayer. Durability is the endorsement of aluminum foil packaging bags. Both types of packaging bags can be printed with patterns, with aluminum foil bags having a softer feel and aluminum plated bags having a harder feel. Therefore, aluminum foil bags are more suitable for use in food, medicine, chemical products, some electronic parts, and mechanical parts. Due to the need for sealing, aluminum foil bags are often used. And aluminum plated bags are mostly used for fast food, which does not mean that aluminum plated packaging bags are not good, but rather proves that aluminum plated packaging has a high cost-effectiveness.