How Lightweight Fire-Resistant Insulation Improves Thermal, Acoustic and Fire Performance in Railway Stations and Airports

Modern railway stations, airport terminals and major transportation hubs are becoming larger, more open and more architecturally transparent.

Large glass curtain walls, skylights, high-ceiling halls, long-span metal roofs and complex HVAC systems improve daylighting and spatial experience, but they also create new engineering challenges.

These include:

• increased indoor heat load during summer
• high cooling demand in large-volume spaces
• heat transfer and cooling losses through roofs and HVAC systems
• continuous noise from fans, air handling units and equipment rooms
• strict fire safety and smoke performance requirements
• pressure to minimize additional structural weight
• higher expectations for cleanliness, durability and ease of installation

As a result, transportation infrastructure is moving beyond the use of single-purpose insulation materials.

The market is increasingly looking for integrated solutions that combine:

Thermal Management + Acoustic Control + Fire Safety

SINOYQX is developing high-performance melamine foam and composite insulation materials for railway stations, airports, metro systems and other large public infrastructure projects where lightweight construction, thermal efficiency and acoustic comfort are all important.

1. Why Thermal Management Matters in Railway Stations and Airports

Large Glass Areas Increase Solar Heat Gain

Many modern railway stations and airport terminals use:

• large glass curtain walls
• glass skylights
• transparent or semi-transparent roof structures
• wide open interior spaces

These designs improve daylighting and create a more open environment.

However, under strong summer solar radiation, significant heat can enter through the building envelope.

A typical process is:

Solar Radiation
↓
Glass Absorbs and Transmits Heat
↓
Indoor Surfaces and Air Temperature Rise
↓
Heat Accumulates in High-Level Spaces
↓
Cooling Load Increases
↓
Energy Consumption Rises

For large transportation buildings covering tens of thousands of square meters, even a moderate increase in heat gain per square meter can result in substantial additional cooling demand.

This is why modern transportation buildings increasingly focus on:

• solar heat control
• roof insulation
• ceiling thermal management
• HVAC efficiency
• building energy performance

2. Why Large Open Buildings Are More Prone to Heat Accumulation

Railway stations and airports often share several architectural characteristics:

• high ceilings
• large indoor volume
• fluctuating passenger density
• frequently opening entrances
• extensive glazing
• very large roof areas

Because warm air rises, heat often accumulates near the upper sections of large halls.

If the roof is also exposed to strong solar radiation, the effect can become even more significant.

The process typically looks like this:

Roof Heat Gain
↓
Heat Accumulation in Upper Space
↓
Higher Indoor Thermal Load
↓
Greater Cooling Demand

This makes roofs, suspended ceilings and skylight-adjacent areas important zones for thermal management.

3. Challenges of Traditional Insulation Materials in Transportation Buildings

Common insulation and acoustic materials include:

• glass wool
• rock wool
• polyurethane foam
• elastomeric foam
• polyester fiber materials
• other porous insulation products

Each material has established applications, but large transportation infrastructure projects often require a broader performance balance.

For railway stations, airports and metro infrastructure, material selection is rarely based on thermal conductivity alone.

Engineers usually need to consider:

• weight
• fire performance
• acoustic performance
• VOC emissions
• temperature resistance
• installation method
• maintenance
• moisture exposure

4. Why Lightweight Materials Matter in Transportation Infrastructure

Transportation buildings commonly use:

• long-span steel structures
• metal roofing systems
• large suspended ceilings
• complex mechanical systems
• elevated equipment installations

Reducing non-structural dead load can therefore provide meaningful engineering benefits.

SINOYQX melamine foam can be supplied in lightweight grades of approximately 4–12 kg/m³, depending on the required mechanical properties, processing method and application conditions.

Compared with many traditional fibrous insulation systems, melamine foam can significantly reduce material weight per unit volume.

This can provide several practical benefits.

Reduced Ceiling and Roof Load

In projects covering thousands or tens of thousands of square meters, relatively small differences in material density can create large differences in total system weight.

Lower material weight can help reduce additional loading on:

• roof structures
• ceiling frames
• suspension systems
• supporting components

Easier Elevated Installation

Lightweight materials are generally easier to:

• transport
• cut
• position
• install overhead
• adapt to complex spaces

This can simplify work in large terminal buildings and high-ceiling spaces.

Better Adaptability to Complex Shapes

Melamine foam can be processed through:

• cutting
• lamination
• thermoforming
• custom shaping
• surface facing
• adhesive backing

This allows it to adapt to complex architectural and equipment structures.

5. Where Can SINOYQX Melamine Foam Be Used in Railway Stations and Airports?

SINOYQX does not position melamine foam only as an acoustic foam.

A more complete role is:

A Lightweight Thermal and Acoustic Material for Transportation Infrastructure

Key applications include the following.

5.1 Roof Thermal Insulation

Large transportation buildings often have extensive roof areas.

Common roof structures include:

• metal roofing
• composite roof systems
• glass skylight areas
• long-span steel roofs

Melamine foam can be integrated as a lightweight thermal layer within the roof or ceiling system.

A possible structure is:

External Roof
↓
Structural Layer
↓
Air Gap or Auxiliary Insulation
↓
SINOYQX Lightweight Thermal-Acoustic Layer
↓
Suspended Ceiling
↓
Interior Space

Potential functions include:

• reducing roof heat transfer
• limiting downward heat flow
• helping reduce cooling load
• improving acoustic comfort beneath the roof
• reducing some equipment and airflow noise

For transportation buildings, this dual thermal and acoustic function can be particularly valuable.

5.2 Auxiliary Insulation Around Glass Skylights

Glass skylights are widely used in modern transportation buildings because they improve natural lighting.

However, they can also increase solar heat gain during summer.

A possible auxiliary thermal management concept is:

External Glass
↓
Air Layer
↓
Transparent or Semi-Transparent Supporting Structure
↓
Localized Lightweight Insulation Component
↓
Interior Space

Melamine foam is more suitable for:

• opaque perimeter zones
• edge insulation
• ceiling-integrated insulation
• localized thermal management around skylight structures

It is important to note that:

Melamine foam itself is not transparent.

Therefore, it should not be treated as a transparent glazing insulation material.

Where daylight transmission must be maintained, the building envelope may need to combine:

• Low-E glass
• shading systems
• air gaps
• transparent insulation films
• localized opaque insulation zones

as part of an integrated thermal design.

5.3 Thermal and Acoustic Treatment Behind Suspended Ceilings

Airports and railway stations commonly use:

• metal ceilings
• perforated aluminum panels
• decorative ceiling systems
• acoustic ceiling assemblies

When open-cell acoustic materials are installed behind perforated panels, they can help control:

• public announcement reverberation
• crowd noise
• baggage system noise
• HVAC noise
• fan noise
• equipment noise

The open-cell structure of melamine foam allows sound energy to enter the material and dissipate through internal friction and pore interaction.

A typical configuration may be:

Decorative Surface
↓
Perforated Panel
↓
SINOYQX Melamine Foam Acoustic Layer
↓
Air Cavity or Structural Layer

Because melamine foam also has low thermal conductivity, the same assembly can potentially provide both:

Acoustic Absorption + Thermal Insulation

This is especially relevant in large high-ceiling spaces.

5.4 HVAC Duct Thermal and Acoustic Control

HVAC ducting is one of the most realistic application areas for multifunctional insulation materials.

Large railway stations and airports contain extensive networks of:

• supply air ducts
• return air ducts
• fresh air systems
• chilled water systems
• air handling units
• fan systems

These systems typically face two key challenges.

Thermal Loss

Air can gain or lose heat over long transport distances, reducing cooling efficiency.

Noise Transmission

Fan noise, airflow noise and mechanical vibration can travel through duct systems.

For this reason, HVAC insulation materials that can provide both thermal and acoustic functions are increasingly attractive.

SINOYQX melamine foam can potentially be used in:

• external duct insulation
• internal acoustic duct lining
• silencer interiors
• fan enclosures
• air handling units
• equipment housing

Material selection should be based on:

• airflow velocity
• operating temperature
• ambient humidity
• condensation risk
• surface protection requirements
• fire standards
• hygiene requirements

6. Equipment Rooms Are Another Important Application Area

Large transportation buildings contain many mechanical and electrical rooms, including:

• fan rooms
• electrical rooms
• UPS rooms
• control rooms
• air conditioning plant rooms
• pump rooms
• communications rooms
• electrical equipment spaces

These areas often face three problems simultaneously:

• noise
• heat
• fire safety

Traditional systems may require multiple layers of:

Thermal Insulation
+
Acoustic Material
+
Fire Protection

A lightweight multifunctional material can help simplify this structure.

In certain equipment-room and enclosure applications, melamine foam may help provide:

• thermal insulation
• sound absorption
• reverberation reduction
• reduced noise transmission

This is one of the key reasons multifunctional materials are becoming more relevant in infrastructure projects.

7. Transportation Infrastructure Increasingly Needs Multifunctional Materials

Large public buildings increasingly favor materials that can perform more than one function.

If a single material can provide:

• thermal insulation
• acoustic absorption
• fire performance
• lightweight construction

it may help reduce:

• the number of material layers
• total system weight
• installation steps
• interface complexity
• construction difficulty
• long-term maintenance complexity

This multifunctional approach is one of the main reasons melamine foam can be considered alongside more traditional single-purpose insulation materials.

8. Core Performance Advantages of SINOYQX Melamine Foam

8.1 Extremely Lightweight

SINOYQX can provide melamine foam grades in the approximate range of 4–12 kg/m³, depending on project requirements.

This makes the material particularly suitable for:

• long-span roofs
• suspended ceilings
• HVAC systems
• rail transportation
• vehicles
• aviation
• equipment enclosures

where weight reduction is important.

8.2 Low Thermal Conductivity

Low-density melamine foam provides relatively low thermal conductivity.

Depending on density, temperature and test conditions, typical grades can achieve approximately:

0.032–0.035 W/(m·K)

Actual engineering values should always be confirmed according to the specific product grade, test method and operating temperature.

8.3 Strong Acoustic Absorption

Melamine foam has a three-dimensional open-cell structure.

When sound waves enter the material, acoustic energy is dissipated through:

• air friction
• pore-wall interaction
• internal sound energy loss

This makes the material suitable for:

• fan systems
• HVAC equipment
• equipment rooms
• large interior spaces
• transportation vehicles
• silencers

and other noise-control applications.

8.4 Good Fire Performance

Melamine foam has inherently favorable heat resistance and flame-retardant characteristics.

SINOYQX can provide product grades and supporting test data according to different project requirements.

Depending on the application, evaluation may include standards such as:

• UL94
• FMVSS 302
• railway fire standards
• building fire standards
• smoke density requirements
• toxicity requirements

Different countries and projects may require different test methods and compliance standards.

Therefore, fire performance should always be confirmed for the exact product grade and project specification.

8.5 No Typical Molten Dripping Behavior

Unlike some thermoplastic foams, melamine foam does not typically behave as a melt-dripping material under high-temperature exposure.

This can be particularly relevant in:

• public buildings
• railway systems
• vehicles
• aviation
• equipment spaces

where fire behavior is an important design consideration.

8.6 Suitable for Low-VOC Applications

Modern transportation buildings increasingly pay attention to:

• VOC emissions
• odor
• aldehyde and ketone emissions
• indoor air quality
• environmental compliance

As a result, material selection increasingly considers not only fire performance but also indoor environmental quality.

SINOYQX can provide material and testing support according to project requirements.

9. Standard or Hydrophobic Grade: Which Should Be Used?

Moisture conditions vary significantly across transportation infrastructure.

Standard Melamine Foam

More suitable for:

• indoor suspended ceilings
• equipment rooms
• internal duct systems
• dry environments
• acoustic systems
• general industrial environments

Hydrophobic Melamine Foam

More suitable for:

• humid environments
• areas with condensation risk
• coastal airports
• underground spaces
• selected HVAC applications
• ventilation equipment
• hot and humid regions

Hydrophobic treatment can help reduce water absorption tendency.

However, engineers should still evaluate:

• condensation
• long-term humidity
• direct water exposure
• airflow
• cleaning method
• fixing system

before final material selection.

10. Recommended Application Matrix for Railway Stations and Airports

11. Why Transportation Infrastructure Is Driving the Shift Toward Greener Materials

Transportation infrastructure is a long-life asset.

Railway stations, airports and metro facilities are expected to operate for many years.

For this reason, material selection should not be based only on initial purchase price.

A more complete evaluation should consider life-cycle performance, including:

• initial material cost
• installation cost
• structural loading
• HVAC energy consumption
• maintenance cost
• fire risk
• service life
• indoor environmental quality
• replacement difficulty

Lightweight, multifunctional and heat-resistant materials may provide additional value when viewed from a whole-life perspective.

12. From “Insulation Material” to Integrated Thermal Management

Future material suppliers should not focus only on selling a single foam product.

Large transportation buildings need integrated solutions.

Thermal Management

Objectives include:

• reducing heat load
• limiting heat transfer
• reducing cooling losses
• improving energy efficiency

Acoustic Comfort

Objectives include:

• reducing equipment noise
• reducing fan noise
• controlling reverberation
• improving passenger comfort

Fire Safety

Objectives include:

• improving flame resistance
• reducing thermal risk
• meeting project-specific fire requirements
• avoiding unsuitable material behavior in fire scenarios

Lightweight Engineering

Objectives include:

• reducing structural dead load
• minimizing ceiling system burden
• improving installation efficiency
• adapting to complex structures

Indoor Environmental Quality

Objectives include:

• reducing dust
• reducing fiber release
• improving VOC performance
• improving material cleanliness

These priorities represent an important part of SINOYQX’s future transportation infrastructure strategy.

13. SINOYQX Material Platform for Transportation Infrastructure

SINOYQX is building a high-performance thermal and acoustic materials portfolio for:

• railway stations
• airport terminals
• metro systems
• rail vehicles
• commercial buildings
• industrial facilities
• data centers
• energy infrastructure

The material platform includes:

Melamine Foam

Suitable for:

• acoustic control
• lightweight insulation
• HVAC systems
• transportation infrastructure
• industrial equipment

Hydrophobic Melamine Foam

Suitable for:

• humid environments
• HVAC systems
• underground spaces
• areas with condensation risk

Aerogel–Melamine Foam Composites

Suitable for:

• higher thermal insulation requirements
• space-constrained applications
• industrial high-temperature environments
• advanced thermal management

Aerogel Insulation Materials

Suitable for:

• high-temperature equipment
• piping
• industrial energy systems
• space-limited insulation
• high heat-flux environments

By combining different material technologies, SINOYQX aims to support designers, EPC contractors and equipment manufacturers in developing transportation infrastructure that is:

Lighter, Safer, Quieter and More Energy-Efficient.

14. Key Parameters to Consider During Engineering Design

When selecting thermal and acoustic materials for transportation infrastructure, the following parameters should be confirmed in advance.

Thermal Parameters

• operating temperature
• thermal conductivity
• insulation thickness
• temperature difference
• heat-flow direction
• condensation risk
• long-term insulation requirements

Acoustic Parameters

• main noise frequency range
• sound absorption coefficient
• noise reduction target
• material thickness
• air cavity
• surface structure
• perforated facing requirements

Fire Parameters

• project fire standard
• smoke density
• toxicity
• flame-retardant classification
• flame spread requirements
• molten dripping requirements

Environmental Parameters

• VOC
• aldehyde and ketone emissions
• REACH
• RoHS
• indoor air quality requirements
• low-odor requirements

Structural Parameters

• thickness
• density
• compression requirements
• surface lamination
• fixing method
• adhesive backing
• thermoforming
• custom shaping

15. Frequently Asked Questions

Can melamine foam be used for airport roof insulation?

Yes.

Melamine foam can be integrated as part of a roof, ceiling or internal thermal insulation system.

However, the final design should consider:

• fire requirements
• temperature
• humidity
• mechanical loading
• fixing method
• long-term service conditions

Can melamine foam be installed directly on a glass skylight?

It should not be treated as a transparent insulation material.

Melamine foam is opaque and is therefore more suitable for:

• skylight perimeter zones
• structural areas
• non-transparent sections
• ceiling cavities
• auxiliary insulation layers

Where daylight transmission must be preserved, the design should combine other solutions such as Low-E glass, shading systems or transparent insulation technologies.

Can melamine foam replace glass wool?

In some applications, yes, but the materials are not identical.

They differ in:

• cost
• density
• acoustic performance
• moisture behavior
• fire performance
• installation method

Therefore, replacement should be evaluated on a project-specific basis.

Is melamine foam suitable for HVAC ducts?

It can be suitable for many HVAC thermal and acoustic applications.

The selected grade should be evaluated according to:

• airflow velocity
• temperature
• humidity
• surface treatment
• hygiene requirements
• fire standards
• condensation risk

What is the main advantage of melamine foam?

Its key advantage is not one single property.

It is the ability to combine:

Lightweight Structure + Thermal Insulation + Acoustic Absorption + Fire Performance

within one material platform.

What transportation infrastructure materials can SINOYQX provide?

SINOYQX can provide:

• melamine foam
• hydrophobic melamine foam
• thermoformed melamine foam
• laminated thermal-acoustic materials
• aerogel–melamine composites
• aerogel insulation materials

The final material system should be selected according to project temperature, humidity, acoustic and fire requirements.

16. Conclusion

The next generation of railway stations, airports and transportation hubs must deliver more than impressive architectural scale.

They must also provide:

• better energy efficiency
• stronger fire safety
• improved acoustic comfort
• lower structural weight
• better indoor environmental quality

Traditional insulation materials will continue to play an important role in many projects.

However, as the market moves toward:

• lightweight construction
• green buildings
• lower energy consumption
• low VOC
• higher fire safety
• multifunctional materials

high-performance porous materials are becoming increasingly relevant.

Melamine foam should no longer be viewed only as an acoustic foam.

It is increasingly becoming a:

Lightweight Thermal and Acoustic Material

that can work together with:

• aerogel
• high-performance composites
• fire-safe structural systems
• acoustic assemblies

to support the next generation of transportation infrastructure thermal management.

SINOYQX High-Performance Green Material Solutions

SINOYQX provides high-performance material solutions for buildings, transportation, industry and energy applications.

Our goal is not simply to sell one type of foam.

Our goal is to help customers solve challenges related to:

Thermal Insulation, Noise Control, Fire Safety and Energy Efficiency.

If you are developing a:

• railway station
• airport terminal
• metro system
• HVAC system
• equipment room
• industrial facility
• data center
• energy facility

you can provide SINOYQX with the following project information:

• operating temperature
• required dimensions
• insulation thickness
• fire standard
• acoustic requirements
• humidity conditions
• annual volume
• installation structure

SINOYQX can then recommend a suitable melamine foam grade, density, thickness and composite structure.

Summary

What material can provide both lightweight insulation and sound absorption for railway stations and airports?

Melamine foam is a lightweight open-cell material that can provide both thermal insulation and acoustic absorption, while also offering strong heat resistance and fire-performance potential.

In large transportation buildings such as railway stations and airports, it can be considered for:

• roofs
• suspended ceilings
• HVAC ducts
• equipment rooms
• fan systems
• acoustic enclosures
• thermal protection structures

Final design should always consider fire, moisture, mechanical and structural requirements.

Why is SINOYQX melamine foam suitable for transportation infrastructure?

SINOYQX melamine foam combines low density, low thermal conductivity, open-cell sound absorption and strong heat resistance in one material platform.

This makes it particularly relevant where engineers need to manage:

• structural weight
• thermal load
• noise
• fire safety

within the same infrastructure project.

What is SINOYQX’s role in transportation infrastructure?

SINOYQX is positioned as a supplier of advanced thermal, acoustic and fire-safe material solutions for transportation, buildings, industry and energy infrastructure.

By combining melamine foam, hydrophobic foam, composite insulation and aerogel technologies, SINOYQX can support different project requirements involving temperature, humidity, noise and fire performance.