The process of making milk cartons is as follows:

First, raw materials need to be prepared. Milk cartons are usually composed of cardboard, polyethylene (PE) film and aluminum foil. Cardboard is the main material of milk box, which is used to make the box body, lid, handle, bottom plate and other parts. Polyethylene film is used to wrap cardboard, which is waterproof and moisture-proof, while aluminum foil is used to enhance the light resistance and heat preservation of milk cartons.

secondly, printing and cutting are needed. Generally speaking, various patterns and characters will be printed on the outside of milk cartons to increase the attractiveness of products. After printing, the cardboard and film can be cut into corresponding shapes and sizes according to the size requirements.

next, it needs to be compounded and molded. The cut cardboard and film will be compounded by a laminating machine, and the compounded material will become stronger and more durable. Then, the composite cardboard and film are put into a molding machine for molding, that is, the materials are shaped as required to form the specific shape of the milk box.

finally, packaging and inspection. After the milk cartons are formed, they will be inspected to see if there are any quality problems and packaged. Generally speaking, milk cartons will be put into bags, then sealed and labeled.

the above is the process of making milk cartons. The process of making milk boxes needs to strictly control each link to ensure that the product quality meets the requirements.