Dunnage bags, also known as airbags, air cushions, and inflatable bags, are used to secure and stabilize cargo. Introduced in 1970, dunnage bags provide convenient and cost-effective cargo stabilization in ISO sea containers, closed railcars, trucks, and oceangoing vessels. Because improperly secured cargo creates safety hazard, dunnage bags improve travel safety. According to the European Commission’s Directorate-General for Mobility and Transport, “up to 25% of accidents involving trucks can be attributable to inadequate cargo securing”.
Dunnage airbags consist of closed chambers filled with air. When at rest, only the static load generated by the weight of the package contents bears upon the cushioning. When dynamic loads occur, these are absorbed by compression of the cushion.
The quantity of inflation air may be varied in accordance with the particular properties and requirements of the package contents. Dunnage bags are commercially available in various sizes and designs, ranging from spheres, standard cushions to corner and edge cushioning and tubular cushioning. Dunnage bags can be used to stabilize, secure, and protect cargo during all sorts of transportation. Dunnage bags are placed in the void between the cargo.
Dunnage bags can be used in all modes of transportation. Most types of cargo can be secured with the use of dunnage bags, including break bulk and palletized cargo, coils, barrels, cases, and crates.
Waterproof and safe to use, Dunnage bags are used for both the shipping and receiving end of transportation. They inflate rapidly with compressed air, and are easy to install.
It is important that the size of the dunnage bags is the correct size. The size is determined by the void. If this does not match, the bags will not do their work properly with potential large damage to cargo and people.