Vacuum bagging film is designed to create an airtight seal around the mold or layup of composite materials. This seal is essential for applying uniform pressure across the entire surface of the part during the curing process. By removing air from the enclosed area, the film facilitates proper compaction and consolidation of the composite layers.

Once a vacuum is applied, the film conforms tightly to the shape of the mold or part, exerting uniform pressure. This pressure ensures that the composite materials adhere properly to each other and to the mold surface, minimizing voids and improving overall structural integrity.

Since vacuum bagging is often used in processes involving heat curing of composites, the film must withstand elevated temperatures without degrading or losing its sealing properties. High-quality vacuum bagging films are heat-resistant and capable of maintaining integrity during the entire curing cycle.

Vacuum bagging films are available in different types and configurations to accommodate various manufacturing needs:

• Perforated Films: Allow for controlled air evacuation and resin flow during the vacuum bagging process.
• Non-Perforated Films: Provide a complete barrier to air, ideal for applications requiring airtight sealing.
• High-Temperature Films: Designed to withstand higher temperatures encountered during autoclave curing processes.