As one of the most common and widely used bag types in flexible packaging, the three-side seal bag boasts a simple structure and efficient production. It is widely used in industries such as food, daily chemicals, pharmaceuticals, agricultural products, and e-commerce logistics. In actual distribution, packaging not only carries product information and brand image but also must withstand external forces such as pressure, friction, and drops during transportation, storage, and handling. Therefore, the width of the edge seal and the strength of the overall structure are directly related to the integrity of the package and the safety of the contents. A high-quality three-side seal bag must strike a balance between sealing and mechanical properties to ensure it remains leak-proof and does not break in complex logistics environments. The width of the edge seal isn't necessarily better; it should be scientifically designed based on the bag's dimensions, content weight, and material properti