Doypack is also called a stand-up pouch, it is a flexible packaging that has a horizontal support structure at the bottom. Whether the bag is open or not, it stands on its own and does not need any support.
Stand-up pouches are a relatively novel form of packaging and have advantages in many aspects, such as improving product quality, enhancing shelf visual effects, being portable, easy to use, fresh-keeping, and good sealability.
The stand-up pouch is laminated by PET/PE, PET/AL/PE/, PET/AL/NY/PE structure, and can also have 2-layer, 3-layer, 4-layer, and other material structures, depending on the packaged products. It is necessary to increase the oxygen barrier protective layer accordingly, reduce the oxygen transmission rate, and prolong the shelf life of the product.
Scope of application:
Stand-up pouch 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, the application of some washing products, daily cosmetics, medical supplies, and other products has gradually increased.
Classification:
1. Ordinary stand-up pouch:
And the general form of a stand-up pouch, adopts the form of four-sealed edges and cannot be re-closed and repeatedly opened. This kind of stand-up pouch is generally used in the industrial supplies industry.
2. Stand up pouch with suction nozzle:
The stand-up pouch with the suction nozzle is more convenient to pour or absorb the contents and can be re-closed and re-opened at the same time, which can be considered as the combination of the stand-up pouch and the ordinary bottle mouth. This kind of stand-up pouch is generally used in the packaging of daily necessities, for beverages, shower gels, shampoos, ketchup, edible oils, jelly, and other liquid, colloidal, semi-solid products.
3. Stand up pouch with zipper:
Self-supporting pouches with zippers can also be re-closed and re-opened. Since the zipper form is not closed and the sealing strength is limited, this form is not suitable for encapsulating liquids and volatile substances. According to the different edge sealing methods, it is divided into four edge sealing and three edge sealing. Four edge sealing means that the product packaging has a layer of ordinary edge sealing in addition to the zipper seal when it leaves the factory. The zipper is then used to achieve repeated sealing and opening, which solves the disadvantage that the zipper edge sealing strength is small and is not conducive to transportation. The three-sealed edge is directly sealed with a zipper edge, which is generally used to hold lightweight products. Self-supporting pouches with zippers are generally used to package some light solids, such as candy, biscuits, jelly, etc., but four-sided self-supporting pouches can also be used to package heavier products such as rice and cat litter.
4. Imitation mouth-shaped stand-up pouch:
Imitation mouth stand-up pouches combine the convenience of stand-up pouches with suction nozzles and the cheapness of ordinary stand-up pouches. That is, the function of the suction nozzle is realized by the shape of the bag body itself. However, the mouth-shaped stand-up pouch cannot be re-sealed. Therefore, it is generally used in the packaging of single-use liquid, colloidal and semi-solid products such as beverages and jelly.
5. Special-shaped stand-up pouch:
That is, according to the needs of packaging, new stand-up bags of various shapes are produced by changing on the basis of traditional bag types, such as waist design, bottom deformation design, handle design, etc. It is the main direction of the value-added development of self-supporting bags.
With the advancement of society and the improvement of people’s aesthetic level, as well as the intensification of competition in various industries, the design and printing of stand-up pouches have become more and more colorful, and its manifestations are more and more.