[China Packaging Network] Milk packaging box is a large variety of fresh milk, all kinds of preservation methods of liquid milk almost all have a box. So what is the process for making milk boxes? The following editors of China Packaging Network will introduce milk packaging boxes in terms of packaging materials, hygiene requirements, preservation, and printing and molding, and hope to help everyone.
First, milk packaging box packaging materials:
The packaging box for liquid milk is made of composite materials. Typical composite materials are composed of the following four materials or several of them.
Polyethylene (hereinafter abbreviated as PE)--seal layer, acts as a barrier to moisture and bacteria;
Cardboard - used to improve the hardness and strength of the box, and have a light protection effect;
Aluminum foil - with excellent oxygen barrier and dark performance;
EVOH Efficient Barrier Layer - an alternative to aluminum foil, is also used to block oxygen and protect from light.
Second, the milk packaging box production hygiene requirements and preservation:
Fresh milk uses different box-making materials depending on the shelf life. The structure of the short-term fresh-keeping milk box requiring refrigeration is relatively simple, and the PE/cardboard/PE composite material is generally used; the aseptic filling milk box for long-term storage in a normal temperature environment is constructed of a material of PE/cardboard/adhesive layer. / Aluminum foil / adhesive layer / PE, or PE / cardboard / EVOH / adhesive layer / PE-type composite material.
Third, milk packaging box printing method:
Offset, gravure and flexo. In the past, the proportion of offset printing was relatively high. In recent years, along with the progress of flexographic technology and the improvement of the quality of flexo printing, the proportion of flexo printing in packaging has continuously increased.
After reading the above, we have a preliminary understanding of some basic information about milk packaging. For more information, please continue to pay attention to China Packaging Network!
