Automatic hemming packaging bags are usually used for packaging of food, medicine, cosmetics, daily necessities and other products. They have the functions of moisture-proof, leak-proof, insect-proof and anti-oxidation. They are suitable for automatic packaging production lines, which can package products quickly and efficiently and improve production efficiency. This kind of packaging bag is usually made of plastic materials. Different materials and specifications can be selected according to different requirements of products to ensure the quality and safety of products.