Tech Blog

Melamine Sound Absorbing Foam Properties and Applications

Melamine sound-absorbing foam is a high-performance open-cell foam with outstanding sound absorption, thermal insulation, flame-retardant properties, and environmental stability. It is widely used in architectural acoustics, transportation, and noise reduction engineering. This article systematically introduces its material characteristics, product forms, sound absorption performance under different installation conditions, and practical application scenarios, providing a professional reference for architects, acoustic engineers, and interior designers.

What Is Melamine Sound Absorbing Foam?

Melamine Sound Absorbing Foam is a thermosetting, open-cell foam with a fully crosslinked, three-dimensional network structure. It combines the advantages of inorganic sound-absorbing materials and organic foam materials, while overcoming their shortcomings, such as brittleness, flammability, and ageing.

Compared with traditional materials:

Lighter than glass wool and rock wool; safer and not easy to break
More flame-retardant and durable than polyurethane foam
Non-toxic, eco-friendly, and stable in performance

Melamine Sound Absorbing Foam Properties

1. Ultra-lightweight

Bulk density: 4–12 kg/m³;
50 mm thick panel: only 200–600 g/m²;
Extremely low load on building structures.

2. High-efficiency sound absorption

Open-cell structure, high air flow resistance;
Noise Reduction Coefficient (NRC) up to 0.90;
Excellent mid-to-high frequency sound absorption.

3. Outstanding flame retardancy

Class B flame retardant (equivalent to DIN 4102 B1);
No molten drips when burned;
Low smoke density (≤15).

4. Wide temperature resistance

Long-term working temperature: -180℃ to 180℃;
Good thermal stability, not easy to age,

5. Thermal insulation & energy saving

Thermal conductivity < 0.0347 W/(m·K);
Good heat insulation reduces energy consumption.

6. Eco-friendly & safe

Non-toxic, odourless, no fibre dust;
Raw materials can be used in tableware;
Meets environmental and hygiene requirements.

7. Easy processing & installation

Can be cut with a utility knife;
Can be pasted or suspended;
No keel or protective cover needed.

Typical Technical Parameters

Item	Index
Bulk density	4–12 kg/m³
NRC noise reduction coefficient	0.70–0.95
Thermal conductivity	<0.0347 W/(m·K)
Long-term service temp	-180~180℃
Flame class	Class B (B1)
Smoke density	≤15
Tensile strength	20.5 KPa

Product Forms & Sound Absorption Performance

Melamine foam can be processed into a variety of acoustic products:

Flat panels
Pyramid-shaped panels
Cylindrical / semi-cylindrical
Square / triangular columns
Sound-absorbing wedges

1. Sound absorption of flat panels (solid installation)

The thicker the material, the better its sound absorption, especially at low frequencies.

Thickness	NRC
30 mm	0.70
40 mm	0.80
50 mm	0.90

2. Pyramid-shaped panels

Better decoration and diffusion;
Slightly lower NRC than flat panels of the same thickness;
A 50 mm thick panel can reach NRC 0.95.

3. Suspended installation (space sound absorber)

Suspended layout can form 360° sound absorption:

Suitable for large spaces: gymnasiums, exhibition halls, stations;
Sound absorption performance improves with smaller spacing;
50 mm flat panel, NRC up to 0.75.

Melamine Sound Absorbing Foam Applications

1. Building acoustics

Gymnasiums, auditoriums, conference rooms;
Studios, listening rooms, recording studios;
Offices, hotels, shopping malls;
Ceiling and wall sound-absorbing decoration.

2. Transportation

Aircraft interior noise reduction;
Ship cabin sound insulation;
High-speed rail, subway, and automotive interior acoustics.

3. Industrial noise control

Equipment sound absorption and noise reduction;
Air duct silencing;
Clean room sound absorption.

4. Special environments

Humid environments (good moisture resistance);
Clean rooms (no fiber dust);
High and low temperature environments.

Applications Advantages Summary

Ultra-light, safe, no broken pieces hurting people
High NRC, excellent sound absorption
Flame retardant, low smoke, non-toxic
Thermal insulation, energy saving
Wide temperature resistance, long service life
Easy installation, strong decoration
Eco-friendly, no pollution

conclusion

Melamine sound absorbing foam is a new generation of high-performance acoustic material with excellent sound absorption, flame retardant, thermal insulation, and environmental protection performance. It is widely used in construction, transportation, industrial noise reduction, and indoor acoustics. By matching different thicknesses, shapes, and installation methods, ideal sound absorption effects can be achieved. For projects requiring safety, environmental protection, light weight, and high sound absorption efficiency, melamine foam is one of the best material choices.

Tech Blog

Melamine Sound Absorbing Foam Properties and Applications

What Is Melamine Sound Absorbing Foam?