🌐 4 kg/m³ Ultra-Light Melamine Foam: YDNFoam™ Thermal–Acoustic Solution for Rocket Payload Fairings
As commercial spaceflight and high-orbit satellite launches continue to accelerate, the requirements for lighter, safer, and more stable thermal-acoustic materials inside rocket payload fairings have become increasingly demanding.
Among all available materials, YDNFoam™ 4 kg/m³ aerospace-grade ultra-light melamine foam has emerged as a preferred solution due to its exceptionally low density, broad temperature stability, inherent flame resistance, and superior acoustic performance.
Developed using YDNFoam™ proprietary micro-cell engineering and the intrinsic flame-retardant triazine molecular structure, this material achieves a performance combination that is:
“Lighter than fiberglass, more temperature-resistant than PU foam, and acoustically superior to conventional foams.”

🚀 Why Rocket Fairings Choose YDNFoam™ 4 kg/m³?
1. Extreme Lightweight (4 kg/m³) — Higher Payload Efficiency
Every kilogram saved inside the payload fairing translates directly into more satellite mass or additional scientific instruments.
Material Type Typical Density (kg/m³) Weight Impact
YDNFoam™ Melamine Foam 4 One of the lightest engineering-grade materials available
Fiberglass Wool 10–80 3–20× heavier
PU Foam 20–35 Too heavy & non-flame-retardant
XLPE Foam 25–80 6–20× heavier
YDNFoam™ 4 kg/m³ = Maximum weight savings + greater design freedom for fairing engineers

2. Wide Temperature Endurance: -200°C to +240°C
Rocket fairings undergo drastic temperature transitions:
Cryogenic pre-launch conditions
High-altitude aerodynamic heating
Rapid thermal shock
YDNFoam™ withstands all stages:
No brittleness at -200°C
No melting or dripping at +240°C
Low thermal conductivity (λ ≈ 0.030–0.035 W/m·K)
Ideal for thermal protection and structural thermal stability.

3. Inherent UL94 V-0 Flame Resistance — No Additives Required
Melamine resin features a naturally flame-retardant triazine ring structure.
YDNFoam™ achieves:
UL94 V-0 rating
No molten drips
Low smoke density
Essential for preventing fire hazards inside payload fairing compartments.

4. High Acoustic Absorption (NRC ≈ 0.85) — Reducing 150–165 dB Launch Noise
Rocket launches create extreme acoustic loads that can damage:
Optical payloads
Avionics
Precision sensors
Structural components
YDNFoam™ offers:
α ≈ 0.85 absorption (500–4000 Hz)
Significant reduction of reflected noise
Lower vibration impact on sensitive instruments
A proven solution for protecting payload integrity during launch.

5. Easy to Process, Bond, and Integrate into Aerospace Structures
YDNFoam™ can be formed into:
Pre-curved liners
Sandwich structures (aluminum foil, flame-retardant fabrics, NOMEX fabric)
Laser-cut shapes
Low-VOC and low-shedding aerospace-clean versions
Fully compatible with CFRP and GFRP composite fairing shells.

🛰️ Typical Rocket Fairing Thermal-Acoustic Liner Structure
Outer Layer: CFRP Composite Payload Fairing Shell
⬇
Middle Layer: YDNFoam™ 4 kg/m³ Thermal–Acoustic Insulation (10–40 mm)
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Inner Layer: Flame-Resistant Non-Woven Fabric / Aluminum Foil (Optional)
Integrated benefits:
Thermal barrier
Acoustic protection
Structural weight reduction
Higher payload safety margin

📌 Aerospace-Grade Performance Specifications
Property Value
Density 4 kg/m³
NRC (Acoustic Absorption) ≈0.85
Thermal Conductivity λ 0.030–0.035 W/m·K
Flame Rating UL94 V-0 (No Dripping)
Operating Temperature -200°C to +240°C
Weathering Resistance No chalking, no shrinkage
Aerospace Options Low VOC, low-shedding, high-cleanliness versions

📞 YDNFoam™ Official Contact (Global Market)
YDNFoam™ | A Division of YDN Group
📍 Address: No. 2088, Jiuliting Avenue, Caoqiao Street, Pinghu City, Zhejiang Province, China
📧 Email: [email protected]
🌐 Website: www.ydnfoam.com
📞 Phone / WhatsApp / WeChat: +86-135-4070-2776