In the process of container transport, due to the goods itself specification limits, the products often can’t be loaded in line. Because of the gap, goods in transportation by sea or highway transportation will be easily crashed,collapsed and damaged. The use of dunnage bags, that avoid the bad situation,and accelerate the speed of container shipment/trailer transportation. The outside of dunnage bag is made of craft paper, coated with PP or PE. It is of compressive strength, not easy to break. The inside of the bag with polyethylene material for making the inflatable bags. Dunnage bag is widely used in container, trailers, train, air-transport, sea-transport etc.