What are the classifications of doypack bags

Doypack bags refer to a flexible packaging bag with a horizontal support structure at the bottom, which does not rely on any support and can stand on its own regardless of whether the bag is opened or not. What are the classifications of doypack bags?

1. Ordinary doypack bags
The general form of doypack bags adopts four-sealing form and cannot be reclosed and reopened. This kind of doypack bags are generally used in the industrial supplies industry.
2. Mouth-like doypack bags
Mouth-like doypack bags combine the convenience of doypack bags with nozzles and the cheapness of ordinary doypack bags. That is, the function of the suction nozzle is realized by the shape of the bag itself. However, mouth-like doypack bags cannot be re-sealed, so they are generally used for the packaging of disposable liquid, colloid, and semi-solid products such as beverages and jellies.
3. Doypack bags with suction nozzle
Doypack bags with a suction nozzle are more convenient to pour or suck the contents, and can be re-closed and re-opened at the same time. It can be considered as a combination of doypack bags and ordinary bottle mouths. This kind of doypack bags are generally used in daily necessities packaging, used to contain beverages, shower gels, shampoos, ketchup, edible oil, jelly and other liquid, colloidal, semi-solid products, such as the famous CiCi and so on.
4. Alien doypack bags
That is, according to packaging needs, new doypack bags of various shapes, such as waist design, bottom deformation design, and handle design, are produced by changing the traditional bag type. It is the main direction of value-added development of doypack bags at present.
With the advancement of society, the improvement of people's aesthetic level and the intensification of competition in various industries, the design and printing of doypack bags has become more and more colorful, with more and more expressions, and the development of special-shaped doypack bags has gradually replaced traditional doypack bags the trend of.
5. Doypack bags with zipper
The doypack bags with zipper can also be reclosed and reopened. Because the zipper is not closed and the sealing strength is limited, this form is not suitable for encapsulating liquids and volatile substances. According to the different sealing methods, it is divided into four sealing and three sealing. Four sealing means that the product packaging has a layer of ordinary sealing besides the zipper sealing at the factory. The ordinary sealing must be torn before use. The zipper is used to realize repeated sealing and opening. This method solves the disadvantage that the zipper has a small edge sealing strength and is not conducive to transportation. The three-sided sealing is directly used as a zipper sealing, which is generally used to hold lightweight products. Doypack bags with zippers are generally used to pack some light solids, such as candies, biscuits, jellies, etc., but doypack bags with four edges can also be used to pack heavy products such as rice and cat litter.
So far, doypack bags are basically divided into five types: ordinary doypack bags, mouth-like doypack bags, doypack bags with nozzles, special-shaped doypack bags, and doypack bags with zippers.