Four-layer aluminum foil bag, also known as aluminum foil composite bag, is a packaging material with excellent barrier performance and high temperature resistance. It is composed of four layers of material, usually consisting of outer, middle, foil and inner layers. The outer layer is mostly polyester (PET) or nylon (NY), the middle layer is usually polyethylene (PE), the aluminum foil layer is used as barrier, and the inner layer is food grade PE material to ensure food safety.
Characteristics of Four Layers of Aluminum Foil Bag
1. Excellent barrier performance: The aluminum foil layer has good barrier properties, which can effectively prevent the penetration of oxygen, moisture and other gases, thus prolonging the shelf life of the food.
2. High temperature resistance: four layers of aluminum foil bags can withstand high temperature cooking, suitable for high temperature food packaging.
3. Environmentally Friendly Recyclable: Aluminum foil bags are recyclable and meet environmental requirements.
4. Good printing effect: the outer PET or NY material has good printing performance, can print a variety of patterns and text, improve the beauty and appeal of the product.
Application Area of Four Layer Aluminum Foil Bag
Four layers of aluminum foil bags are widely used in food, medicine, chemical and other fields. In the food sector, it is often used to package meat, seafood, vegetables, fruits and other fresh foods, as well as cookies, confectionery and other snacks. In the field of medicine, four layers of aluminum foil bags are used for packaging pharmaceuticals, health products, etc. In the chemical field, it can be used in packaging chemical raw materials, coatings, etc.