This patent is to install and fix the device for distributing the inner corners of the packaging bag in the powdery, granular, and liquid product packaging bags, so that the packaging bag becomes a functional packaging bag with quantitative leakage and sealing leakage prevention; and it can be installed inside the bag. Leakage device to achieve a one-way opening and closing mold to complete the production once! It can be installed in the simplest way with the manufacturing process of the long bag of the bag in the production process of the packaging bag of the tool and equipment semi-manual or automatic machine production line!

It is applicable to the manufacturers of milk, rice and detergent, the manufacturers of flexible bags and the manufacturers of bag machinery. Solving the long-standing inconveniences and annoyances of users of flexible packaging products has met demand, especially for those who travel abroad, study, and medical care.

The long-term production cost of each functional bag increases by less than 0.1 yuan compared to the normal type. About one-tenth increase in sales, or a one-tenth increase in the price can be balanced. It is a powerful move for flexible packaging and application vendors to compete in the market.