In our daily life, the products are very common such as raw materials, fertilizer, rice and so on. If we have to use proper bags, we generally choose heavy packaging aluminum foil bags, including polypropylene woven bags, paper bags and co-extruded polyethylene heavy packaging bags. Co-extruded PE heavy packing bag is used for automatic molding, filling and sealing of heavy packing bag packaging system, also known as FFS bag. Although we mainly use polypropylene woven bags and paper bags as heavy packaging bags, FFS bags have attracted more and more attention because of their high performance and high efficiency.