Short answer: When is PMI foam preferred?
PMI foam is a closed-cell structural core used where high specific stiffness, low density, dimensional stability and compatibility with elevated-temperature processes are required. It is considered for aerospace, defence, UAV and rail sandwich structures. ✈️
Why does it matter?
Prepreg and hot-press processes can expose the core to temperature and pressure simultaneously. Service temperature and process temperature are not the same. Selection must cover both conditions, dwell time and pressure.
Key advantages of PMI foam
- High performance-to-weight ratio
- Dimensional stability at elevated temperature
- Fine and controlled cell options
- Machinability for complex geometry
- Compatibility with carbon and glass fibre sandwich skins
Product family and application focus
HyboFOAM C addresses general structural performance; HyboFOAM E supports different engineering needs; HyboFOAM RF focuses on fine-cell surface quality; and HyboFOAM CRH is evaluated for rail and fire-performance requirements. Final grade selection must be verified against the relevant TDS and project specification.
PMI or PVC foam?
PVC foam is a strong cost and processing choice for marine and general industrial uses. PMI is advantageous for advanced structures requiring higher temperature capability and stiffness. Evaluate total panel performance, cycle temperature and serial-production cost rather than selecting the lowest density alone.
Frequently asked questions
Can PMI foam be used in an autoclave?
It can be used when the correct grade and process window are selected. Temperature, pressure, duration and moisture conditions must be verified against product data.
Where is it used in UAV structures?
Potential uses include wings, control surfaces, fuselage panels, covers and equipment panels in lightweight sandwich construction.
How do I request a technical review?
Share service and cure temperatures, pressure, target density, thickness, sheet dimensions and sector through the technical quotation request.