The inner wall of the milk carton is made of aluminum foil. Aluminum foil paper is used inside milk packaging boxes; aluminum foil paper is mostly offset printed. For example, the disposable lunch boxes used on airplanes are now made of aluminum foil. They can be placed in a microwave oven to heat meals and some fried foods. There are also aluminum foils used in hairdressing, and aluminum foil is also used in commonly referred to as tinfoil perm.
The role of milk packaging boxes
Milk packaging boxes are made of composite materials. The packaging boxes are six-layer composite packaging composed of paper, aluminum and plastic. Typical composite materials Polyethylene is made of the following four materials or a combination of several of them. The sealing layer serves to block moisture and bacteria. The cardboard is used to improve the hardness and strength of the box and has a light-proof effect.
Aluminum foil has excellent oxygen and light-proof properties, and can effectively isolate milk from air, light and bacteria. Therefore, it can be stored at room temperature and has a long shelf life of up to 45 days. Paper packaging Bags are cost-effective and their costs are low. The packaging of boxed milk is a six-layer composite paper packaging composed of paper, aluminum and plastic.