Self-supporting packaging bag is a kind of packaging bag that can stand without relying on any object whether it is opened or not. It can greatly improve the grade of the product. The shelf life of the product.

Ordinary stand-up pouches adopt four edge sealing methods and cannot be re-closed and opened repeatedly. This kind of stand-up pouch is generally used in the industrial supplies industry.

The stand-up pouch with suction nozzle is more convenient to pour or absorb the contents, and can be re-closed and opened repeatedly, which can be considered as the combination of stand-up pouch and ordinary bottle mouth. This kind of stand-up pouch is generally used in the packaging of daily necessities, and is used to hold beverages, shower gels, shampoos, ketchup, edible oil, jelly and other liquid, colloid, and semi-solid products.

Stand-up bags with zippers can also be closed from the beginning and opened repeatedly, because the zipper method is not closed and the closure strength is limited, so this method is not suitable for packaging liquids and volatile substances. According to different edge sealing methods, it is divided into two types: four-edge sealing and three-edge sealing. Four-edge sealing means that the product package has a layer of ordinary edge sealing besides the zipper seal when it leaves the factory. The ordinary edge sealing needs to be torn off before use. Then use the zipper to realize repeated sealing. This method solves the defect that the zipper edge sealing strength is small and is not conducive to transportation.

The three-side seal is directly sealed with a zipper seal, which is generally used to hold lightweight products. Stand-up bags with zippers are generally used to pack some light solids, such as candy, biscuits, jelly, etc., but stand-up bags with four sides can also be used to pack heavier products such as rice and cat litter.

The mouth-like stand-up pouch combines the convenience of a stand-up pouch with a suction nozzle and the cheapness of a general stand-up pouch. That is, the function of the suction nozzle is realized through the shape of the bag body itself. However, the mouth-like stand-up pouch cannot be sealed repeatedly, so it is generally used in the packaging of liquid, colloid, and semi-solid products such as beverages and jellies.

According to the packaging needs, new stand-up bags of various shapes are produced on the basis of changes on the basis of traditional bag shapes, such as waist design, bottom deformation design, handle design, etc. It is the main direction for the value-added development of stand-up pouches.

With the progress of society and the improvement of people's aesthetic level and the intensification of competition in various industries, the design and printing of stand-up bags have become more and more colorful, and there are more and more ways of expression. The development of special-shaped stand-up bags has a tendency to gradually replace the position of traditional stand-up bags .