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Dunnage bagsare creative and simple protecting tools in transportation whichare made of high-strength Kraft paper wrapped in PP and PE, it’stoughness and reliable. The inner shell is made of five layers ofcoextrusion films, mainly PE. Back valves are convenient in theiroperation of inflation and deflation. They are also airproof andsolid, so that they can effectively prevent cargo collisions intruck, container or railway transport. Air bags can fully fill thespace between cargoes, support the weight generated by jolt andweaken vibration to protect goods from damage in transport. Theyare better than any other supports, fillings or protectors, andmore environment-friendly than traditional materials, such as foamplastics.