4 kg/m³ Melamine Foam — One of the Lightest Thermal & Acoustic Insulation Materials in the World
(by SINOYQX)
Why 4 kg/m³ Melamine Foam Is Among the Lightest High-Performance Insulation Materials
| Material Type | Density (kg/m³) | Acoustic Performance (α, mid-high freq) | Thermal Conductivity λ (W/m·K) | Flame Resistance |
| Melamine Foam (4 kg/m³) | 4 | ≈ 0.85 | 0.030–0.035 | UL94 V-0, self-extinguishing |
| Open-Cell Polyurethane Foam | 10–40 | Moderate | Average | Flammable |
| Glass Wool | 10–80 | Excellent | Excellent | Non-combustible |
| Crosslinked Polyethylene (XLPE) | 25–80 | Poor | Excellent | Flammable / Flame-retardant |
| Foam Aluminum | ≥100 | Average | Average | Flame-retardant |
Key Insight: At a density of just 4 kg/m³, melamine foam uniquely combines ultra-lightweight, flame resistance, high acoustic absorption, and thermal insulation—making it almost unmatched in current aerospace-grade material selections.
- Satellite Module Acoustic and Thermal Insulation Layer
Application Overview
In satellite structures, payload bay and module interiors require both sound absorption (to reduce launch-induced acoustic loads) and thermal insulation (to protect temperature-sensitive instruments). 4 kg/m³ melamine foam delivers excellent broadband absorption (1–4 kHz) while keeping structural weight extremely low—critical for launch cost efficiency.
Verification & Testing
- Acoustic: ISO 10534-2 / ASTM C423 — α ≥ 0.80 in 1–4 kHz range
- Outgassing: ASTM E595 — TML ≤ 1.0%, CVCM ≤ 0.10%
- Thermal: ISO 8301 / ASTM C518 — λ ≤ 0.035 W/m·K
- Vibration: Endurance per satellite load spectra
- Compatibility: With honeycomb panels, MLI films, and harnesses
Typical Case Study (Weight Reduction)
- Area: 10 m², Thickness: 20 mm → Volume 0.2 m³
- Melamine Foam (4 kg/m³): 0.8 kg vs. Glass Wool (24 kg/m³): 4.8 kg
- Result: ~83% lighter with equivalent thermal-acoustic performance
- Rocket Section Thermal and Acoustic Protection
Application Overview
Rocket engine compartments and interstage sections face high acoustic energy and thermal loads during ascent. 4 kg/m³ melamine foam, with densified surfaces and PI film facings, provides heat and noise suppression without significant mass penalties.
Verification & Testing
- Acoustic: High SPL/random vibration tests per LV spec
- Thermal: ISO 8301 / ASTM C518 — plus radiative heat analysis
- Abrasion: Wind tunnel airflow erosion
- Flammability: UL94 V-0; NASA/ESA fire standards
- Outgassing: ASTM E595 for enclosed use
Typical Case Study (Thermal Shielding + Mass)
- Target: ΔT ≥ 10–15°C across fuselage wall
- Config: PI film (25 μm) + 20 mm / 4 kg/m³ melamine foam + metal wall
- Result: ~0.8 kg / 10 m² core mass — dual-function protection
- Aircraft Passenger Cabin and Avionics Bay Interior Insulation
Application Overview
Commercial aircraft cabins and avionics compartments require noise reduction, thermal comfort, and fire safety. 4 kg/m³ melamine foam reduces cabin noise, prevents condensation, and meets strict aviation flammability standards.
Verification & Testing
- Acoustic: ASTM C423 / NVH testing — ≥ 4 dB(A) reduction
- Flammability: FAR 25.853, ASTM E662, BSS 7238/7239
- Thermal: ISO 8301 / ASTM C518
- Durability: Temp/humidity cycling, vibration endurance
- Health/Safety: ISO 16000 VOC emissions
Typical Case Study (Noise + Insulation)
- Area: 10 m², Thickness: 15 mm → Volume 0.15 m³
- Melamine Foam (4 kg/m³): 0.6 kg vs. PU Foam (20 kg/m³): 3.0 kg
- Result: ~80% lighter, cabin noise drop ≥ 4 dB(A)
- Military Aircraft Noise and Thermal Signature Reduction
Application Overview
Military aircraft demand materials that reduce cabin noise, minimize infrared signature, and withstand extreme environments. 4 kg/m³ melamine foam achieves these goals without compromising payload.
Verification & Testing
- Acoustic: NVH tests for idle, cruise, and maneuvers
- Flammability: UL94 V-0 / FAR 25.853 / MIL-STD fire safety
- Impact Resistance: Structural load/shock spectra
- Thermal/IR: ISO 8301 / ASTM C518 + IR signature analysis
- Environmental Durability: Temp cycling, humidity, salt fog
Typical Case Study (Noise + Load Optimization)
- Area: 10 m², Thickness: 20 mm → Volume 0.2 m³
- Melamine Foam (4 kg/m³): 0.8 kg vs. Acoustic Cotton (18 kg/m³): 3.6 kg
- Result: ~78% lighter, ≥ 5 dB(A) noise reduction, ~3% IR signature drop
Global Advantages for Aerospace OEMs
- Weight Savings: Up to 80% lighter than traditional materials
- Dual Functionality: Thermal + acoustic in one layer
- Compliance: Meets UL94 V-0, FAR 25.853, ASTM E595, and more
- Durability: Withstands vibration, temperature extremes, humidity
- Cost Efficiency: Reduced launch and operational costs
Contact SINOYQX
SINOYQX
📧 Email: [email protected]
📞 Phone/WeChat: +86-135-4070-2776
🌐 Website: www.sinoyqx.com