Melamine Foam: Perfect for Thermal and Acoustic Insulation

Melamine foam is a functional material with excellent sound attenuation and noise reduction properties, as well as good flame retardancy. When used for insulation, it helps to regulate heat transfer and radiant heat transfer to enhance safety and comfort. Its sound and vibration isolation properties create a quieter environment for everyone. In this article, we’ll go into further detail about why melamine foam is perfect for both thermal and acoustic insulation.

EDS of SINOYQX Melamine foam

What is melamine foam?

Melamine foam is a smooth, flexible, low-density, microcellular material made from melamine resin, a thermosetting polymer composed of melamine and formaldehyde. To make melamine foam, the melamine resin compound is foamed with a blowing agent and then cured. The result is a material with a unique three-dimensional structure characterized by a highly interconnected (open-cell) cross-linking system.

The high degree of cross-linking in melamine foam makes it more resistant to cold and more thermally stable than traditional foams such as polyethylene, polypropylene and polyurethane, which are less cross-linked. Melamine foams can withstand extremely high (up to +240°C) and low (down to -180°C) temperatures over long periods of time while maintaining stability and their functionality.

Melamine acoustic for for SONG MAX 2 1

Functions and properties of melamine foam

Melamine foam sheets have become the ultimate choice for a wide range of thermal and acoustic insulation solutions due to their excellent functionality and properties. The quality of melamine is much higher compared to other insulating materials. Some of the features and properties that define this open-cell insulation include:


-Flame retardant

-Water resistant -Hydrophobic foam only

-Low flame propagation, smoke generation and toxicity

-Easy to customize

-Semi-rigid, but also flexible

1. Lightweight

The use of lightweight insulation materials offers many advantages for a variety of applications. They reduce production costs and time and provide greater flexibility. With a weight of less than 0.75 pounds per cubic foot (lb/ft3), melamine foam is often the insulation of choice when the weight of the material may have a significant impact on the application. Just think of aerospace and military applications where weight is critical.

Because of its open-cell structure, melamine foam is lighter than traditional thermal and acoustic insulation and can easily match the performance of thicker insulation.

2. Flame retardancy

For safety reasons, any insulation must be flaming retardant. After all, this is the primary use of insulation. Flame retardant materials inhibit the spread of fire and protect buildings and other applications from fire damage. The nitrogen compound in melamine foam is non-flammable and suppresses smoke, meeting UL 94 flammability safety standards. It resists high temperatures without melting or forming burning droplets and is suitable for fire safety environments with high level requirements.

SINOYQX light grey melamine foam scaled

3. Waterproof

Normally, standard melamine foam is not waterproof. Therefore, it is preferable to turn to hydrophobic melamine foams for applications where the risk of exposure to water and moisture is high. Melamine foams, such as hydrophobic melamine, are coated with a waterproofing resin that is cured by UV light, making them impervious to water. Other forms undergo plasma vaporization to increase their water resistance. Hydrophobic melamine foams are particularly recommended for acoustic and thermal insulation in applications that require extreme moisture resistance, low flame propagation, and so on. This is the case, for example, with airplane fuselages and walls, ECS piping and new energy vehicles.

sinoyqx hydrophobic melamine foam 4

4. Low flame propagation, smoke generation and toxicity

Depending on the pressure and inlet temperature, a fire or flame can spread (propagate) by conduction, convection or radiation. Regardless of the method used, flame spread can be devastating, causing irreparable damage and creating many safety hazards. Proper insulation can help inhibit the spread of fire and increase safety. Melamine foam is known for its low flame spread characteristics in high temperature environments and applications. Conversely, when exposed to high temperatures, it scorches, reducing oxygen supply and slowing flame spread for increased safety.

5. Easily Customizable

Ideal insulation should be easily customizable to fit a variety of insulation applications. Melamine foam is one of the most customizable insulation materials. It has an open-cell structure that enhances versatility and makes it easy to cut. It is available in different shapes, colors, and sizes to meet user specifications. In addition, you can determine the ideal melamine foam density for your thermal or acoustic application. Whether you want to use it for thermal management or as an acoustic foam, the material is highly customizable to meet your insulation needs.

6. Semi-rigid, but also flexible

Oddly enough, melamine foam is flexible despite its semi-rigid nature. This is because its molecular structure and composition provides some flexibility and allows it to deform under pressure or bending without permanently losing its shape. This flexibility allows melamine foam to adapt to irregular surfaces and meet a wide range of thermal and acoustic insulation requirements, while maintaining its integrity and efficiency.

Melamine foam applications:

Melamine foam is mainly suitable for acoustic and thermal insulation applications. It has excellent acoustic, fire- and flame-retardant properties. In addition, it is lightweight, versatile and durable.

We focus on its two main innovative applications:

Thermal insulation

Temperature fluctuations are a safety hazard and can cause irrevocable damage due to extreme heat. Melamine foam insulation has a high nitrogen content, which helps regulate heat transfer by conduction and radiation, thereby increasing safety. Its low thermal conductivity slows flame propagation and heat transfer without the need for additional flame retardants.

Many industries, such as aerospace, public transportation and telecommunications, use it to improve safety in applications that require high heat resistance and low flame and smoke spread. For example, melamine foam can be used to insulate: truck compartments and engines, ducts in HVAC systems, airplane walls and fuselages, and more.

Sound absorption

Melamine foam is notable for its sound absorption properties. It has a microscopic cellular structure that absorbs sound waves, isolates vibrations and prevents noise from reverberating through floors, walls and ceilings. This property makes melamine foam an ideal insulator for industrial, transportation, aerospace, construction and other applications.

For example, melamine foam can be used to attenuate sound generated by fans and ducts in HVAC systems. It can also be used to insulate engine compartments, doors, walls, and driver and passenger compartments in trains.


Melamine foam is undoubtedly an excellent solution for thermal and acoustic insulation applications. It is lightweight, flame-retardant, waterproof and has excellent acoustic properties. It can withstand high temperatures and control noise and vibration for a more comfortable and quieter environment. It is used in a wide range of industries for high performance insulation requirements.

For more information about SINOYQX Melamine Foam, please reach us or voice to us: +86-28-8411-1861.

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