Thermal Bonded Acoustic Insulation Felt Board

Hot Air Cotton & Needle Punched Nonwoven Sound Absorbing Material

Jinhaocheng Thermal Bonded Acoustic Insulation Felt is a three-dimensional nonwoven insulation material manufactured through a combination of needle punching, hot-air bonding and thermal pressing.

The material is engineered by controlling fiber composition, needle-punching density, thermal bonding and pressing conditions to achieve different levels of thickness, density, hardness, flexibility and structural stability.

Depending on the application, the finished material can be produced as a soft, semi-rigid or rigid acoustic insulation board and customized into different dimensions and shapes.

It is designed for a wide range of sound absorption, noise reduction, thermal insulation and flame-retardant applications, including automotive interiors, wall and ceiling insulation, KTV rooms, machinery, industrial equipment, refrigerators and other appliances.

Key Features

Excellent Sound Absorption

The three-dimensional fiber structure creates numerous interconnected air spaces inside the material.

These porous structures can help absorb and dissipate sound energy, making the material suitable for various acoustic insulation and noise reduction applications.

The acoustic performance of nonwoven materials is affected by factors including fiber composition, thickness, density and bonding structure. Research has specifically examined the effect of thermal bonding methods on the sound absorption characteristics of nonwoven fabrics.

Adjustable Density and Hardness

Different acoustic applications require different material structures.

We can adjust the processing conditions to produce:

• Soft acoustic felt
• Semi-rigid acoustic felt
• Rigid acoustic insulation board
• High-density acoustic felt
• Lightweight acoustic insulation
• Flexible sound absorbing felt
• Structural acoustic insulation components

The needle-punching density and thermal pressing degree can be adjusted according to the application.

Thermal Bonded 3D Fiber Structure

The hot-air bonding process allows thermoplastic low-melting fibers to soften and bond at fiber contact points, helping form a stable three-dimensional structure.

Further thermal pressing can control the thickness, surface density and hardness of the finished material.

This type of thermal-bonded nonwoven structure is also used commercially in acoustic and automotive insulation applications.

Custom Thickness and Dimensions

The material can be manufactured according to your required:

• Thickness
• GSM
• Density
• Hardness
• Width
• Length
• Shape
• Color
• Fiber composition

It can also be processed into different shapes and dimensions for OEM applications.

Flame-Retardant Options

For applications requiring enhanced fire resistance, flame-retardant fiber and material formulations can be used.

Different flame-retardant grades can be developed according to the required application, testing method and customer specifications.

This makes the material suitable for acoustic applications where both sound absorption and flame-retardant performance are required.

Acoustic Insulation Applications

1. Wall Acoustic Insulation

The material can be used as an acoustic filling layer inside wall cavities and partition systems.

It can help reduce airborne noise transmission between rooms and improve the acoustic environment of buildings.

Typical applications include:

• Interior walls
• Partition walls
• Office partitions
• Hotel rooms
• Residential buildings
• Commercial buildings
• Meeting rooms

• Acoustic wall systems

  
  

2. Ceiling and Roof Acoustic Insulation

Thermal bonded acoustic felt can be used inside ceiling and roof structures where both sound and thermal insulation are required.

Applications include:

• Ceiling sound insulation
• Roof acoustic insulation
• Attic insulation
• Building thermal insulation
• Commercial building insulation
• Interior ceiling acoustic systems

The material can be customized according to the available installation space.

3. Automotive Acoustic & NVH Insulation

Automotive applications are one of the important markets for engineered nonwoven acoustic materials.

Our thermal bonded and needle-punched acoustic felt can be customized for different vehicle interior and body components.

Typical applications include:

• Car door panel insulation
• Door trim insulation
• Dashboard insulation
• Headliner insulation
• Roof liner insulation
• Automotive floor insulation
• Trunk insulation
• Wheel arch insulation
• Engine hood insulation
• Engine compartment insulation
• Firewall insulation
• Pillar insulation
• Automotive NVH insulation

Automotive suppliers commonly use thermal-bonded and needle-punched nonwoven materials in NVH applications, including door panels, roof systems, engine areas and other vehicle components.

4. KTV and Entertainment Room Acoustic Insulation

The material can be used as an internal sound-absorbing layer for:

• KTV rooms
• Karaoke rooms
• Recording studios
• Music rooms
• Home theaters
• Podcast rooms
• Conference rooms
• Entertainment rooms

It can be installed behind decorative acoustic panels or used as internal filling material in acoustic structures.

5. Machinery and Industrial Equipment

Machines and industrial equipment often require internal acoustic insulation to help control operating noise.

The material can be customized into panels, inserts or irregularly shaped components.

Applications include:

• Industrial machinery
• Generators
• Compressors
• Pumps
• Motors
• HVAC equipment
• Mechanical equipment
• Machine enclosures
• Industrial cabinets
• Equipment housings

The material can be cut according to equipment dimensions and internal structures.

6. Refrigerator and Home Appliances

The lightweight and customizable structure makes this material suitable for acoustic insulation inside household appliances.

Potential applications include:

• Refrigerator acoustic insulation
• Refrigerator door insulation
• Compressor insulation
• Washing machine acoustic insulation
• Air conditioner insulation
• Appliance sound insulation
• Appliance vibration reduction

Custom-cut pieces can be manufactured according to the internal dimensions of the appliance.

Acoustic + Thermal Insulation

One of the advantages of this type of thermal bonded nonwoven is that the material can provide more than one function.

Depending on the fiber composition and structure, it can be engineered for:

Sound Absorption

Helps dissipate acoustic energy through its porous fiber structure.

Acoustic Insulation

Used as an insulation layer within walls, vehicles, machinery and appliances.

Thermal Insulation

The three-dimensional fiber structure can trap air and provide thermal insulation.

Cushioning

The material can provide cushioning and protection between components.

Lightweight Construction

Nonwoven fiber structures can provide useful insulation performance without requiring a heavy solid material.

Flame Retardancy

Flame-retardant fiber combinations can be selected for applications requiring improved fire resistance.

Custom Material Structure

The final properties of the acoustic insulation material can be adjusted through the combination of:

Fiber Composition

Different fibers can be selected according to application requirements, including:

• Polyester
• Recycled polyester
• Low-melting-point polyester
• Polypropylene
• Wool
• Other synthetic fibers
• Customized fiber blends

Needle-Punching Density

The needle-punching process can be adjusted to control fiber entanglement, thickness and structural stability.

Thermal Bonding

Hot-air bonding creates bonding points between fibers and helps stabilize the three-dimensional structure.

Thermal Pressing

Thermal pressing can further control:

• Thickness
• Density
• Hardness
• Surface structure
• Dimensional stability

This allows one basic material system to be customized into different grades for different acoustic applications.

Available Specifications

OEM & ODM Acoustic Insulation Solutions

Jinhaocheng provides customized acoustic nonwoven materials for manufacturers, distributors and OEM customers.

We can customize the material according to:

• Product drawings
• Samples
• Required thickness
• Required density
• Required hardness
• Required GSM
• Required dimensions
• Acoustic requirements
• Thermal insulation requirements
• Flame-retardant requirements
• Installation method

Whether you need a soft acoustic filling material, a semi-rigid insulation board, or a hard molded acoustic component, the material structure can be adjusted according to the final application.

Why Choose Jinhaocheng?

Jinhaocheng Nonwovens specializes in needle-punched and customized nonwoven materials.

Our production capabilities allow us to work with different fiber compositions and processing conditions to produce nonwoven materials with different thicknesses, densities, hardness levels and functional properties.

We provide:

• Custom acoustic insulation materials
• Thermal bonded nonwoven
• Hot air cotton
• Needle punched nonwoven
• Acoustic felt
• Sound absorbing felt
• Automotive NVH insulation
• Flame-retardant nonwoven
• Custom-cut insulation components
• OEM & ODM production

With customized production from raw fiber selection to nonwoven processing and final cutting, we can support both standard material orders and application-specific development.

Request a Custom Acoustic Insulation Material

Looking for a thermal bonded acoustic insulation manufacturer or custom hot air cotton supplier?

Send us your required:

Thickness + Density + Hardness + GSM + Size + Application

You can also provide drawings or samples.

Our team can recommend a suitable needle-punched and thermal-bonded nonwoven structure for your sound insulation, thermal insulation or flame-retardant application.

Frequently Asked Questions

1. What is thermal bonded acoustic felt?

Thermal bonded acoustic felt is a nonwoven insulation material made by bonding fibers through heat. Combined with needle punching and thermal pressing, it can be produced with different thicknesses, densities and hardness levels for acoustic and thermal insulation applications.

2. What is hot air cotton used for?

Hot air cotton, also known as thermal bonded nonwoven or air-through nonwoven, can be used for thermal insulation, acoustic insulation, cushioning and other applications. High-density grades can be developed for automotive and industrial acoustic applications.

3. Can hot air cotton be used for sound insulation?

Yes. Properly engineered thermal bonded nonwoven can be used as a sound-absorbing or acoustic insulation layer. The actual acoustic performance depends on fiber type, thickness, density, structure and installation conditions.

4. Can you make different hardness levels?

Yes. The material can be manufactured in soft, semi-rigid and rigid grades by adjusting fiber composition, needle-punching density and thermal pressing conditions.

5. Can you make custom sizes?

Yes. Custom thicknesses, widths, lengths and die-cut shapes are available according to customer requirements.

6. Can the acoustic felt be flame retardant?

Yes. Flame-retardant fiber systems and material formulations can be used to produce flame-retardant acoustic insulation grades according to the required application and testing standard.

7. Can this material be used in automobiles?

Yes. Customized acoustic nonwoven can be used for automotive door panels, roof liners, headliners, floors, trunks, wheel arches, engine compartments and other NVH applications.

Contact us to obtain free samples of sound insulation felt