Three aspects need to understand the production of milk packaging box

[China Packaging Network] Milk packaging boxes come in a wide variety, as different preservation methods for liquid milk almost always use some kind of box. But have you ever wondered how these boxes are made? In this article, the editors at China Packaging Network will take a closer look at the materials used, hygiene standards, preservation techniques, and the printing and manufacturing processes involved in producing milk packaging boxes. We hope this information helps you better understand the industry.

First, let's explore the materials used in milk packaging boxes:

The packaging boxes for liquid milk are typically made from composite materials. These materials are designed to provide both protection and structural integrity. A common combination includes the following layers:

- Polyethylene (PE): This is the innermost layer, acting as a moisture and bacteria barrier. It ensures that the milk remains sealed and protected from external contaminants.

- Cardboard: This provides the box with strength and rigidity, while also offering some level of light protection to preserve the quality of the milk.

- Aluminum Foil: Known for its excellent oxygen barrier properties and ability to block out light, aluminum foil is often used in long-life milk packaging to extend shelf life without refrigeration.

- EVOH (Ethylene-Vinyl Alcohol): As an alternative to aluminum foil, EVOH serves as an efficient oxygen barrier and offers similar light-blocking capabilities, making it a popular choice in modern packaging solutions.

Second, the production of milk packaging boxes requires strict hygiene standards and proper preservation methods. The type of material used depends on the intended shelf life of the milk. For short-term fresh milk that needs refrigeration, the packaging is usually simpler, often using PE/cardboard/PE composites. On the other hand, for long-life milk that can be stored at room temperature, more advanced materials such as PE/cardboard/adhesive/Aluminum Foil/adhesive/PE or PE/cardboard/EVOH/adhesive/PE are commonly used to ensure aseptic conditions and extended freshness.

Third, the printing process for milk packaging boxes involves several techniques, including offset, gravure, and flexographic printing. While offset printing was once the most common method, advancements in flexographic technology have led to a significant increase in its usage. Today, flexo printing offers high-quality results and is widely preferred in the packaging industry due to its efficiency and cost-effectiveness.

After reading this, you now have a clearer understanding of the key aspects of milk packaging. If you're interested in learning more about packaging innovations or industry trends, be sure to continue following China Packaging Network for more updates!