Three aspects need to understand the production of milk packaging box

[China Packaging Network] Milk packaging boxes are widely used for various types of fresh milk, and almost every preservation method for liquid milk involves a box. But have you ever wondered how these boxes are actually made? In this article, we’ll walk you through the process of manufacturing milk packaging boxes, covering materials, hygiene standards, preservation techniques, and printing methods. Whether you're in the packaging industry or just curious, this guide is designed to give you a clear understanding.

First, let's talk about the materials used in milk packaging boxes. These boxes are typically made from composite materials, which combine different layers to provide optimal protection for the product. The most common components include:

1. Polyethylene (PE) – This acts as the inner sealing layer, providing a moisture and bacterial barrier.

2. Cardboard – This gives the box structural strength and rigidity, while also offering some light protection.

3. Aluminum Foil – Known for its excellent oxygen and light barrier properties, aluminum foil is often used in long-life milk packaging.

4. EVOH (Ethylene-Vinyl Alcohol) – A modern alternative to aluminum foil, EVOH offers similar oxygen barrier performance without the need for metal layers. It’s commonly used in flexible packaging solutions.

Second, the production of milk packaging boxes must meet strict hygiene requirements, especially when it comes to food safety. Depending on the shelf life of the milk, different materials are used. For example, short-term refrigerated milk usually uses a simpler structure like PE/cardboard/PE. On the other hand, long-life milk that can be stored at room temperature requires more advanced materials, such as PE/cardboard/adhesive/Aluminum Foil/adhesive/PE or PE/cardboard/EVOH/adhesive/PE. These combinations ensure that the milk remains safe and fresh for extended periods.

Third, the printing process plays a key role in the final appearance of the packaging. Common methods include offset, gravure, and flexographic printing. While offset printing was once the dominant choice, recent advancements in flexographic technology have led to improved print quality and efficiency. As a result, flexo printing is now increasingly popular in the packaging industry, especially for high-volume production runs.

By understanding the materials, hygiene standards, and production techniques involved in making milk packaging boxes, we gain a better appreciation for the complexity behind something we often take for granted. If you're interested in learning more about packaging innovations or the latest trends in the industry, be sure to keep an eye on China Packaging Network for more updates!