Vacuum Bagging is a technique that imposes vacuum pressure to the surface of the object between the mouldtooland the vacuum bag to optimize the fiber-to-resin ratio of the product. Therefore, it can improve the mechanical performance of the product.

Usually, the vacuum bagging process canbe classified as two types:

1. Vacuum bagging for resin infusion. Infuse the resin to dry preform of fabrics layers with a stable pressure.

2. Vacuum bagging for prepreg or wet lay-up Impose vacuum pressure onfabricsimpregnated with resin.