Vacuum bagging is one of a variety of methods used for the bonding and laminating of manufactured composite parts and tools. Generally speaking, the part being bonded is surrounded by an airtight membrane or diaphragm, a vacuum is pulled on that membrane and the surrounding pressure forces the membrane tightly to the vacuum bagged article. Once the item is vacuum bagged it is allowed to cure for a specific period of time depending on its composition. Curing can take place in an oven, autoclave, at room temperature or in a mechanical press.
Vacuum bagging produces exceptionally strong parts with little, if any, air entrapment.