A vacuum bag is a durable, high-strength bag typically made of polyester, polyurethane, or silicone materials, used in composite manufacturing. During the production of carbon fiber or composite laminates, the vacuum bag removes air and excess resin, applying uniform pressure to ensure material consolidation and a smooth surface finish. Vacuum bagging is commonly used in vacuum-assisted resin transfer molding (VARTM) and other composite forming processes, making it an essential tool for producing high-quality composite parts.
