In fact, most food paper bag packaging does not need to be perforated. If there is a perforation, it is also to release the air in the bag and puncture and shrink after sealing to prevent air from occupying space. Small holes are usually provided on the side of the food packag...

There are many types of food packaging that can be distinguished according to the food packaged. For example, it can be divided according to physical properties, and can be divided into liquid food packaging (including fluid and semi-fluid colloids) packaging that requires fil...