✅ No Indentation on Infused Parts — The integrated VAP film layer regulates air evacuation and prevents resin channel marks, ensuring a smooth, defect-free surface.
✅ Extended Working Time — Optimized airflow reduces premature resin gelling and extends the operational window of your vacuum infusion system.
✅ 30–50% Labor Saving — Pre-assembled multi-layer design eliminates on-site cutting, aligning, and taping of individual consumables.
✅ Stable High-Temperature Performance — Rated for continuous use at up to 120°C (overall assembly); individual layers withstand up to 160°C.
✅ 100% Air Permeability — Flow media permeability ≥ 2 L/m²/s for rapid, uniform air removal.
✅ Improved Product Consistency — Repeatable layer structure and bonding ensure uniform quality across every infusion cycle.
Item | Specification |
Product Structure | VAP film + Vacuum bag film + Flow guide mesh (hot-melt bonded) |
Manufacturing Process | Hot-melt / Heat-sealing process |
Custom Size | Available upon request |
Maximum Operating Temperature (Overall) | 120°C |
Air Permeability | 100%; Flow media ≥ 2 L/m²/s |
Hydrostatic Pressure | ≥ 8000 mmH₂O |
VAP Film | Material: Polyester / Nylon (PET / Nylon) |
Vacuum Bag Film | Material: PA/PE |
Flow Guide Mesh (Flow Media) | Material: PE or PP |
Tensile Strength (Longitudinal) | ≥ 40 MPa |
Tensile Strength (Transverse) | 240 lpa (unit adjustable if needed) |
Elongation (Longitudinal / Transverse) | 2400% / 2400% |
Appearance Requirements | Flat surface, clean edges, no burrs, no damage, no scratches, no indentation; bonding lines without cracking |
Key Features | Low cost, high efficiency, no indentation, improved infusion quality, longer vacuum system lifetime |
Storage Conditions | Store in a cool, dry place; avoid direct sunlight |
Our air extraction bags are suitable for all vacuum infusion processes across a wide range of composite manufacturing industries:
Designed for large-surface carbon-fiber and glass-fiber structures, ensuring uniform resin distribution and void-free consolidation in oversized blade molds.
Trusted for hulls, decks, and superstructures requiring zero-void surface finish and structural integrity.
Delivering consistent compaction for body panels, chassis parts, and interior structures in carbon-fiber and glass-fiber automotive production.
Suitable for flat and curved architectural or equipment panels in both prototyping and mass production.
Compatible Infusion Processes: RTM · VARTM · VARI · LRTM · and other resin infusion methods
During vacuum infusion:
The air extraction bag is placed over the laminate.
The flow media allows air to move quickly toward the vacuum outlet.
The VAP film regulates air evacuation, preventing resin channel marks.
Vacuum bag film maintains negative pressure.
Resin flows evenly without leaving indentations or defects.
The result is a stable vacuum environment and smooth, defect-free composite surface.
Compared with traditional manually assembled consumables:
Traditional Layup | Air Extraction Bag |
Multiple layers need cutting and fixing | Pre-assembled multi-layer design |
Higher labor time | 30–50% time saving |
Print-mark risk | No indentation |
Higher material cost | Lower overall cost |
Requires skilled operators | Easy for any operator |
A: It is a pre-assembled vacuum consumable used in composite vacuum infusion, combining VAP film, vacuum bag film, and flow media into a single product to ensure smooth airflow and high-quality surface finish.
A: The overall assembly is rated for up to 120°C. Individual layers (VAP film up to 160°C, vacuum bag film up to 150°C) offer higher temperature resistance for short durations.
A: Yes. We support any length, width, or shape—including I-shaped, T-shaped, and H-shaped configurations—based on customer requirements.
A: Yes. The integrated VAP film layer ensures zero indentation and eliminates resin channel marks on the finished composite part.
Yes. Sample rolls or cut pieces are available upon request.
