Why is there a layer of adhesive film inside the paper salad box?

There will be a layer of adhesive film inside the paper salad box, mainly due to various considerations:

Firstly, this layer of adhesive film is usually a thin film made of plastic materials such as polyethylene, which has good waterproof performance. It can effectively prevent moisture from salads and other foods from seeping into the paper packaging, thereby keeping the food dry and fresh. This is particularly important for foods that require a certain level of humidity to extend their shelf life.

Secondly, the adhesive film also has certain anti oil and anti fouling properties. Salads and other foods often contain a lot of oil, and this film can effectively prevent oil from penetrating into the paper packaging, avoiding the packaging from becoming greasy and easy for consumers to clean and handle.

In addition, the adhesive film can enhance the strength and durability of the paper salad box. It can make the packaging more sturdy and prevent damage during transportation and storage. Meanwhile, the adhesive film can also provide a certain degree of glossiness and aesthetics, making the packaging more attractive.

In summary, the adhesive film inside the paper salad box is designed to improve the packaging's water, oil, and dirt resistance, as well as its strength and durability. This design not only helps maintain the freshness and dryness of food, but also enhances the attractiveness and practicality of packaging.