Doypack refers to a soft packaging bag with a horizontal support structure at the bottom. It does not rely on any support and can stand on its own regardless of whether the bag is opened or not. Doypack is a relatively new packaging form, which has advantages in improving product grade, enhancing visual effect of shelves, carrying, portability, convenient use, preservation and sealing Independent bags made of PET/foil/PET/PE structure laminated, can also have 2 layers,3 layers and other specifications, according to the packaging of different products, according to the need to increase the oxygen protection layer, reduce the oxygen permeability, prolong the shelf life of products

Stand-up bag packaging is mainly used in fruit juice drinks, sports drinks, bottled drinking water, absorbable jelly, condiments and other products. In addition to the food industry, some washing products, daily cosmetics, medical supplies and other products are gradually increasing in application.

Standing bags are basically divided into the following five types:

1. Ordinary standing bag: and the general form of standing bag, using four edge sealing form, can not be re-closed and repeated opening, this standing bag is generally used in industrial supplies industry

2. Standing bag with suction nozzle: With a suction nozzle self-reliance bag more convenient dumping or absorb content, at the same time can be opened and closed again and repeat can be thought of as the combination of self-supporting bag and ordinary bottle This self-supporting bag generally used in commodity packaging, used for holding drinks Shower gel shampoo, ketchup jelly semi-solid liquid gel products such as edible oil, such as the famous pleased lang CiCi

 3. Zippered pocket

Zippered stand-up bags can also be re-closed and re-opened, because the zipper form is not closed and closed strength is limited, so this form is not suitable for packaging liquid and volatile substances According to the different edge sealing methods, it can be divided into four edge sealing and three edge sealing. Four edge sealing means that there is a layer of ordinary edge sealing besides the zipper sealing when the product packaging leaves the factory. When using, it is necessary to tear the ordinary edge sealing and then use the zipper to realize repeated sealing Zippered stand-up bags are generally used to pack some light solids, such as candy, biscuits, jelly, etc., but the four-side stand-up bags can also be used to pack heavy products such as rice, cat litter, etc

4. Mouth shaped pouch:

The mock - mouth stand - up bag combines the convenience of a stand - up bag with the cheapness of a regular one. That is, through the shape of the bag body to achieve the function of the suction nozzle. But imitation mouth type stand up bag can not be repeated sealing, therefore, generally used in drinks, jelly and other disposable liquid, colloid, semi-solid product packaging.

5. Shaped pouch:

That is, according to the packaging needs, on the basis of the traditional bag type changes produced by the various shapes of the new self-reliance bag, such as waist design, bottom deformation design, handle design. Is the main direction of the value-added development of self-reliance bags.