The puffed food is a loose or crunchy food made from cereals, potatoes, beans, fruits and vegetables, or nut seeds, and is made by baking, frying, squeezing, microwave, etc. Although it is criticized for its safety in nutrition, additives, etc., its crisp taste and varied taste are still the favorites of many teenagers.
Common puffed food packaging forms are mainly divided into three types: plastic flexible packaging, plastic drums (boxes) and paper drum packaging. The latter two types of packaging have good stiffness, which can effectively protect the internal puffed food from being crushed, but the plastic drum (box) package has poor sealing performance and short shelf life. In contrast, the high-barrier aluminum foil is covered in the drum package. The layer is sealed with a good sealing film, and the quality is good, but the cost is also relatively high. Therefore, the most popular puffed food packaging on the market is a flexible plastic packaging.
Inflatable plastic flexible packaging is a form of packaging: after the food is placed in a soft plastic packaging container, it is vacuumed or not vacuumed, and then filled with a protective gas such as nitrogen or carbon dioxide to seal the package. According to the type of inflation, it is divided into air-filled plastic flexible packaging and nitrogen-filled plastic flexible packaging. According to this principle, the inflated body constructs a layer of insulation between the crisp and fragile puffed food and the package, and exerts a cushioning and shock absorption effect, so that the inflatable plastic flexible package excels in pressure resistance.
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