The outer ply of Container Bag is made of high intension kraft paper,PP woven and PE members, which is tough and strong. It’s inner bag is made of 5 layers coextrusion PA film. The especially designed non-leaking air intake valve, which can endure more than 10 tons of pressure, releases sir inside the bag fast and easy. Container Bag is easy to use, which is widely used because it may be save a lot loading time and reduce transportation cost