The four-side sealing bag includes four sealing sides, and two films are combined to seal the four sides. This is the source of the four-side sealing bag.

1. Features of four-side sealing bag:

(1) The appearance of the product has good three-dimensional effect, and the product is cubic after packaging. It can be used for food preservation, recycling many times, and fully using the packaging bag space.

(2) The unique four-side sealing bag design can effectively prevent bursting. The new printing technology highlights the pattern design and trademark effect. Special trademarks or patterns can be designed to have a good anti-counterfeiting effect.

(3) The high-level and differentiated shelf effect of products can be emphasized.

(4) It is rich in variety, resistant to cooking, moisture-proof, good vacuum effect, low oxygen permeability, high sealing performance, and good heat sealing performance.

(5) Strong resistance to irritation to prevent outside lines. In particular, anti-static and other effective protection products are not affected by the external environment and extend the shelf life.

2. The main products of four-side sealing bags include:

(1) OPP, CPP, PET, nylon, aluminized and other composite bags.

(2) Blank or multi-color sling bags, self-adhesive bags such as OPP, CPE, PP, PE, PP.

(3) Express bags of various sizes such as PE, PP, PO, OPP, CPP, flat bags, organ bags.

(4) Design and manufacture a series of PVC handle bags, environmental protection bags, zipper bags, etc.

3. The scope of application of products with four-side sealing bags:

Four-side sealing bags are usually used in developing countries such as Central and South Asia. They are mainly used for powdered food, dried fruits and tea. The food that needs to be stored is put in the bag. Some foods require the air to be exhausted to achieve sanitation, environmental protection, and extend the shelf life. It is widely used in snack food packaging, powder food packaging, and food production enterprise packaging.

There is still a big difference between a four-side seal bag and a three-side seal bag in the usual sense, but the source of such a product name can be simply understood in the literal sense. Not only that, in terms of application, the two products are parallel There is no big difference. For example, three-sided sealing bags can also be applied to food bags and cosmetics packaging. The two still have the same place in this respect.