1. The structure and manufacturing process of the spout bag
The spout bag is a composite bag, which is composed of three parts: upper, middle and lower. The upper part is usually in the form of a zipper pocket; The middle part is the main bag body, which can be divided into blown film, coating, lamination, polyester, etc. by different processes; The lower part is a nozzle-type three-dimensional structure, and special equipment and processes are required to make it. When making a spout pouch, you first need to make a nozzle and open it on the main pouch in the middle, and then insert the nozzle to form a three-dimensional structure.
2. Comparison of the production process of the spout bag
Spout pouches can be made using different processes, among which injection molding is one of the more commonly used processes. When making suction nozzles by injection molding, you need to make the nozzle mold first, inject the molten material into the mold, and then take out the nozzle after cooling. The nozzle made by the injection molding process is less expensive to make, but it requires a special mold and is not suitable for small batch production. In addition to injection molding, spout pouches can also be made by pasting, heat sealing, gluing and other processes, and the nozzles made by different processes have their own advantages and disadvantages.
3. Application fields of spout pouches
Spout pouches are widely used in food, chemical, pharmaceutical and other fields, and their main advantage is that they are easy to carry and easy to use. Among them, in terms of food packaging, the advantages of spout pouches are more prominent, which can greatly extend the shelf life of food and maintain the freshness of food.
