Polyimide Foam — Technical Overview & FAQs

What is Polyimide Foam?

Polyimide Foam is a lightweight, non-wicking foam that offers thermal insulation, acoustic absorption, and low fire/smoke/toxicity performance — ideal where these properties are critical.

Where is Polyimide Foam typically used?

Aircraft and aerospace applications: fuselage panels, under-floor spaces, ECS ducts, equipment housings.
Industrial oven insulation, vent/duct insulation, high-temperature tooling.
Acoustic damping in equipment, enclosures, rail, marine and industrial systems.

What makes Polyimide Foam different?

Ultra-low density (~0.44 lb/ft³) offering high strength-to-weight ratio.
Flame/smoke performance: Smoke Developed Index < 5 in flaming and non-flaming modes.
Thermal conductivity ~0.32 Btu/(h·ft²·°F) at 75 °F (good insulation) and continuous use up to ~400 °F.
Low out-gassing: TML <1.0% and CVCM <0.1% for sensitive aerospace/electronics.
Easily die-cut and fabricated; formaldehyde free.

Key Properties

Density: 0.44 lb/ft³ ASTM D3574(Test A)/ISO 845
Smoke Developed Index (Flaming & Non-Flaming): < 5 ASTM E662
Noise Reduction Coefficient (NRC)-1″: 0.75 ASTM C423 / ASTM E795
Thermal Conductivity @ 75°F: 0.32 Btu/(h·ft²·°F) ASTM C518
Off-gassing TML:< 1.0 % ASTM E595
Off-gassing CVCM: < 0.1 % ASTM E595
Maximum Continuous Use Temp: ~400 °F

Request Polyimide Foam samples, technical data sheets, or custom fabrication from H-O Products - contact us.