Packaging bag classification

There are many kinds of packaging bags. The following are several common types of packaging bags:

Three-sided sealed packaging bag: Three-sided sealed packaging bag is the most common kind of packaging bag, with three sides sealed and one opening, leaving only one opening for users to load products. This package is extensible and can be customized according to requirements. The resealable zipper, the easy-to-tear opening and the hanging hole of the shelf display can all be realized on the three-sided sealed bag. Three-sided sealed packaging bags are common in all kinds of condiment packaging bags, and some snack products will also choose three-sided sealed packaging bags.

Four-sided sealed bags: Four-sided sealed bags are common in bread packaging bags. The left and right sides of this kind of packaging bag are folded, which has more space than three-sided sealing bag, can hold more products, has a more stereoscopic overall shape and is more upscale than three-sided sealing bag. Some nut products, as well as miscellaneous grains products, will also use this kind of packaging bag.

Eight-sided sealing bag: Eight-sided sealing bag is more stereoscopic than four-sided sealing bag. Besides the left and right sides, the bottom is also folded. After being filled with products, the bottom can be flat to achieve the effect of self-reliance, thus better displaying the products.

Self-supporting bag: The self-supporting bag is sealed at the back, so the pressure bearing capacity of both sides of the bag is stronger, and the possibility of packaging damage is greatly reduced. The total length of self-supporting packaging bags with the same size is the smallest, which will reduce the probability of sealing cracking to some extent.

Middle-sealed packaging bag: Middle-sealed packaging bag is also called back-sealed bag or pillow-shaped bag. The bag is pillow-shaped with top seam, bottom seam and back seam. The back sealing bag adopts hidden longitudinal edge sealing, which ensures the integrity of the front pattern of the package to the greatest extent. In the process of packaging design, the bag pattern can be set as a whole to keep the picture coherent, exquisite and beautiful, and the appearance features are distinct.

The above are several common packaging bag types, and different packaging bag types are suitable for different products and application scenarios.