Bagging Films are the sealing layer placed over a composite laminate stack during vacuum infusion, oven cure, and autoclave processing, holding vacuum pressure across the tool surface while resisting the process temperature. Selecting the right Bagging Films grade affects vacuum integrity, cycle reliability, and tool reuse, which makes material selection an important sourcing decision for FRP and composite manufacturers.
Bagging Films Product Range and Specifications
This product line covers eleven grades built on PE, PE/PA, PA, modified PA, PTFE, modified PTFE, and PI films, spanning vacuum infusion and oven processing up to the most demanding high-temperature autoclave cycles.
| Grade | Thickness | Max Width | Applicable Characteristics | Max Use Temperature | Material Type |
|---|---|---|---|---|---|
| D400-75 | 0.003in (75µm) | 236in (6m) | Vacuum infusion/oven process | 212°F (100°C) | PE |
| D500Y-50 | 0.002in (50µm) | 236in (6m) | Vacuum infusion/oven process | 302°F (150°C) | PE/PA |
| D500Y-65 | 0.003in (65µm) | 236in (6m) | Oven process | 302°F (150°C) | PE/PA |
| D600-50 | 0.002in (50µm) | 197in (5m) | Autoclave process | 338°F (170°C) | PA |
| D7400-50 | 0.002in (50µm) | 197in (5m) | Autoclave process | 392°F (200°C) | PA |
| D7400-75 | 0.003in (75µm) | 197in (5m) | Autoclave process | 392°F (200°C) | PA |
| D1500-50 | 0.002in (50µm) | 197in (5m) | Autoclave process | 446°F (230°C) | Modified PA |
| D1500-75 | 0.003in (75µm) | 197in (5m) | Autoclave process | 446°F (230°C) | Modified PA |
| VBF280L-75 | 0.003in (75µm) | 50in (1.27m) | Autoclave process | 536°F (280°C) | PTFE |
| VBF280-75 | 0.003in (75µm) | 50in (1.27m) | Autoclave process | 599°F (315°C) | Modified PTFE |
| VBF400-50 | 0.002in (50µm) | 39in (1m) | Autoclave process | 752°F (400°C) | PI |
All grades listed above carry a two-year storage life under normal conditions. Nylon-based (PA) grades have strong water absorption that can affect physical properties, so it is recommended to use them under humidified conditions. Actual operating temperature depends on mold shape, curing parameters, resin system, and laying method, so buyers should validate each grade under their own process conditions before committing to volume orders.
Choosing a Bagging Films Grade for Your Process
D400-75 and the D500Y series are PE and PE/PA grades suited to vacuum infusion and standard oven cure up to 302°F (150°C). D600-50 steps up to PA construction for autoclave work at 338°F (170°C), while the D7400 series extends PA film to 392°F (200°C) in 50µm and 75µm thicknesses. The D1500 series uses modified PA for autoclave cycles up to 446°F (230°C). For the highest-temperature autoclave processing, VBF280L-75 and VBF280-75 are PTFE and modified PTFE films rated to 536°F (280°C) and 599°F (315°C) respectively, and VBF400-50 is a PI film rated to 752°F (400°C), the highest maximum use temperature in this range.
Applications in FRP and Composite Layup
This material is placed over the breather, peel ply, and release film layers during hand lay-up, vacuum infusion, and autoclave molding of FRP parts for marine, pipe and tank, pultrusion, filament winding, and wind energy applications, sealing the layup so a consistent vacuum can be drawn and held through the full cure cycle. Composite manufacturers can reference process and testing guidance from standards bodies such as the ASTM D20 Committee on Plastics alongside their own qualification testing when specifying vacuum bagging materials.
Because grade selection depends on cure temperature, tooling geometry, and resin system, Bagging Films are commonly ordered together with other auxiliary agent products such as release films, peel ply, and breather fabrics used in the same vacuum bagging or autoclave layup.
Sourcing and Supply
Chemicalsstore.com supports overseas composite material buyers, FRP factories, boat builders, pipe and tank manufacturers, pultrusion factories, and filament winding manufacturers with supply chain resource support for Bagging Films and related vacuum molding auxiliary materials. Buyers evaluating a grade for a new process are encouraged to request the technical data sheet for full performance indicators before finalizing an order.
Frequently Asked Questions
What are Bagging Films used for?
They are used to seal the laminate stack during vacuum infusion, oven cure, and autoclave processing, allowing a consistent vacuum to be drawn and held across the tool surface throughout the cure cycle.
Which grade is rated for the highest temperature?
VBF400-50, a PI film, is rated to 752°F (400°C), the highest maximum use temperature in this range, followed by VBF280-75 (modified PTFE) at 599°F (315°C).
Why do PA-based grades need humidified storage?
Nylon (PA) materials have strong water absorption, which can affect their physical properties; it is recommended to store and use PA-based grades such as D600-50, D7400, and D1500 under humidified conditions.
What widths are available?
Maximum widths range from 39 inches (1m) for the high-temperature VBF400-50 grade up to 236 inches (6m) for the D400-75 and D500Y series, allowing buyers to match film width to part size.
How should Bagging Films be stored?
All grades carry a two-year storage life under normal conditions; actual performance should be verified under the buyer’s own process conditions before large-volume use.
For technical data sheets, grade recommendations, or a quotation on Bagging Films for your next FRP or composite production run, contact our team through the inquiry form on this page.
