Bi-component Nonwoven Line

Aolong’s bi-component nonwoven line is designed to produce high-performance nonwoven fabrics from two polymer components within a single filament. By combining different polymers in a controlled fiber structure, the production line can create fabrics with a balanced combination of strength, softness, elasticity, bonding performance, and processability.

The line is suitable for manufacturers producing technical nonwovens for hygiene, medical, filtration, and other applications where a conventional single-polymer spunbond structure may not provide the required combination of fabric properties. Aolong provides bi-component spunbond equipment with production configurations developed around the target polymer combination, fiber structure, fabric GSM, working width, production capacity, and final application.

What Is a Bi-component Nonwoven Line?

A bi-component nonwoven line is a production system that forms fibers containing two different polymer components and converts them into a bonded nonwoven web.

Unlike conventional spunbond production, where one polymer forms the filament, bi-component technology combines two polymers within the same filament. The two components can be arranged in different cross-sectional structures according to the required fiber performance and end-use application.

A common configuration is the core-sheath structure. In this arrangement, one polymer forms the core of the filament while another polymer surrounds it as the sheath. The two components can perform different functions within the same fiber.

For example, the core can provide structural support and strength, while the sheath can provide bonding characteristics and surface properties. This allows manufacturers to engineer the finished nonwoven fabric around specific performance requirements rather than relying on the properties of a single polymer.

Core-Sheath Nonwoven Production Line

The core-sheath structure is one of the most important configurations for bi-component spunbond production.

In a core-sheath filament, the core material is enclosed by the sheath material. During processing, the two polymer streams remain separate while being combined into a single filament with the required cross-sectional structure.

The production process generally includes:

Raw Material Feeding → Polymer Melting → Separate Extrusion → Metering → Core-Sheath Spinning → Cooling → Drawing → Web Formation → Thermal Bonding → Winding

The exact configuration depends on the selected polymer combination and finished fabric requirements.

For applications requiring thermal bonding, the sheath can be selected to provide suitable bonding characteristics while the core maintains the required mechanical properties. This makes core-sheath technology particularly useful when manufacturers need to balance softness, strength, bonding performance, and production efficiency.

How a Bicomponent Spunbond Machine Works

A bicomponent spunbond machine needs to control two polymer streams throughout the extrusion and spinning process.

Two Polymer Feeding Systems

The production line begins with two polymer materials supplied through separate feeding systems. Each polymer needs stable feeding to maintain the required ratio between the core and sheath components.

The selected polymers should be evaluated according to melt flow behavior, processing temperature, compatibility, and the target fiber structure.

Separate Extrusion

The two polymers are melted through independent extrusion systems.

Separate extruders allow the production line to control the processing conditions of each component before the materials enter the spinning system.

This is particularly important when the two polymers have different melting characteristics or require different processing temperatures.

Metering and Polymer Ratio Control

The polymer streams are metered before entering the spinning assembly.

Accurate control of the core-to-sheath ratio is important because it affects filament structure, bonding behavior, material consumption, and finished fabric performance.

The appropriate ratio depends on the polymer combination and the intended application.

Core-Sheath Spinning

The two polymer streams are combined within the spinning system to form the required bicomponent filament cross-section.

For a core-sheath structure, one polymer remains inside the filament while the second polymer forms the surrounding sheath.

Stable spinning conditions are essential for maintaining consistent filament geometry across the working width.

Cooling and Drawing

After extrusion from the spinneret, the filaments are cooled and drawn.

The drawing process helps control filament orientation and denier while contributing to the mechanical properties and uniformity of the resulting web.

Web Formation

The continuous bicomponent filaments are distributed into a uniform web.

Web formation needs to maintain consistent fiber distribution across the entire working width because variations in web structure can affect GSM, strength, appearance, and bonding performance.

Thermal Bonding

The formed web is consolidated through thermal bonding.

The bonding conditions depend on the polymer combination and sheath material. The process must provide sufficient bonding between filaments while maintaining the desired fabric softness, strength, elasticity, and surface characteristics.

Winding

The finished nonwoven fabric is wound into rolls for storage, transportation, or downstream converting.

Winding tension and roll formation should be controlled according to the fabric structure and final roll requirements.

Key Advantages of Bi-component Spunbond Technology

Bi-component technology allows manufacturers to assign different functions to the two polymers within one filament.

Combined Strength and Softness

The core can provide structural support while the sheath contributes surface characteristics and bonding behavior.

This structure can help manufacturers produce fabrics that balance mechanical strength with a softer hand feel.

Controlled Thermal Bonding

The polymer combination can be selected to provide suitable bonding characteristics.

This allows the production process to be configured around the required bonding temperature and fabric structure.

Improved Elasticity Potential

Certain polymer combinations and fiber structures can provide improved elasticity or recovery characteristics compared with conventional mono-component spunbond fabrics.

This is particularly relevant for nonwoven materials used in products requiring flexibility and conformability.

Functional Fiber Engineering

Instead of relying on a single polymer to provide every required property, bi-component technology allows different polymer components to perform different functions.

This provides greater flexibility when designing nonwoven fabrics for specialized applications.

Material Structure Optimization

The core and sheath ratio can be adjusted according to the product requirements.

The objective is to achieve the required fabric performance while using the polymer combination efficiently.

Bi-component Nonwoven Line Configuration

The configuration of a bi-component nonwoven line should be developed around the polymer combination and finished fabric specifications.

A typical line may include:

The final equipment configuration should be determined after confirming the polymer combination, filament structure, target GSM, fabric width, production speed, and application.

Core-Sheath vs Other Bi-component Fiber Structures

Bi-component fibers can use different arrangements of the two polymers. The appropriate structure depends on the required fabric performance.

Core-Sheath

The core is surrounded by the sheath.

This structure is particularly suitable when the two polymers need to perform clearly different functions. The core can provide strength and structural support, while the sheath can contribute bonding or surface characteristics.

Side-by-Side

The two polymers occupy different sides of the filament.

This configuration can be used when the interaction between the two polymer components is intended to influence fiber behavior, including crimp or elasticity.

Selection Depends on the Application

The fiber cross-section should not be selected independently of the final product.

The appropriate configuration depends on:

• Polymer combination
• Melting characteristics
• Target fiber denier
• Fabric GSM
• Required strength
• Required softness
• Elasticity requirements
• Bonding conditions
• Final application

For projects requiring a core-sheath structure, the equipment should be configured specifically for the required polymer combination and fiber geometry.

Polymer Combinations for Bi-component Nonwoven Production

The polymer combination is one of the most important factors when selecting a bicomponent spunbond machine.

Common combinations can include polymers with different functions, allowing the manufacturer to engineer the fiber around the final fabric requirements.

A core-sheath system may use one polymer for the structural core and another polymer for the bonding sheath.

The appropriate combination should be selected according to:

• Melting temperature
• Melt flow characteristics
• Polymer compatibility
• Fiber formation requirements
• Bonding behavior
• Finished fabric performance
• Application requirements

For this reason, customers should provide detailed information about their intended polymer materials when requesting a bi-component production line proposal.

Applications of Bi-component Nonwoven Fabric

Bi-component nonwoven technology is suitable for applications where fabric performance needs to combine multiple functional characteristics.

Hygiene Products

Bi-component spunbond fabrics can be used in selected hygiene applications where softness, flexibility, strength, and bonding performance are important.

Potential applications include:

• Diaper components
• Elastic waistband materials
• Absorbent product components
• Personal hygiene product substrates

Medical Nonwovens

The combination of softness, strength, and controlled fabric structure can make bi-component nonwovens suitable for selected medical and protective textile applications.

The required fabric specification depends on the final medical product and applicable standards.

Filtration

Bi-component fibers can be engineered for filtration substrates where fiber structure, surface characteristics, strength, and air permeability need to be balanced.

The final filtration performance depends on the fiber structure, GSM, pore characteristics, bonding conditions, and downstream processing.

Technical Nonwovens

Bi-component technology can also be applied to industrial and technical nonwovens where multiple performance requirements need to be achieved within a single fabric structure.

Bi-component Spunbond vs Mono-component Spunbond

The main difference is the number of polymer components used to form each filament.

Bi-component equipment is therefore not simply a more complex version of a conventional spunbond machine. It is a production system designed to engineer the fiber structure itself.

How to Choose a Bicomponent Spunbond Machine

Selecting a bicomponent spunbond machine should start with the target fabric rather than the equipment model.

1. Define the Polymer Combination

Identify the intended core and sheath materials and confirm their processing characteristics.

2. Determine the Fiber Structure

Decide whether the project requires core-sheath, side-by-side, or another bi-component configuration.

3. Define the Target Fabric

Confirm:

• Fabric width
• GSM
• Thickness
• Strength
• Softness
• Elasticity
• Surface characteristics
• Air permeability

4. Determine Production Capacity

The required output should be evaluated based on the actual product mix rather than a single maximum-speed figure.

5. Consider Downstream Processing

The fabric may require slitting, winding, lamination, converting, printing, or other downstream processes.

The production line should therefore be configured around the complete manufacturing process.

6. Evaluate Factory Conditions

Factory space, electrical supply, cooling systems, compressed air, raw material storage, finished-roll handling, and installation conditions should all be considered during project planning.

7. Request a Material Trial

For a new polymer combination, a material trial can help verify spinning stability, web formation, bonding performance, and finished fabric properties before the final equipment configuration is confirmed.

Bi-component Nonwoven Production Line Manufacturer

Aolong Nonwoven has specialized in nonwoven production equipment since 2012 and provides complete production line services covering project design, processing, installation, commissioning, and operator training. Its product portfolio includes PP spunbond, r-PET spunbond, bi-component spunbond, PET fiber needle-punched, and other nonwoven production technologies.

For a bi-component project, equipment manufacturing is only one part of the investment.

A complete project may require:

• Production line design
• Polymer processing configuration
• Factory layout planning
• Equipment manufacturing
• Installation
• Commissioning
• Operator training
• Trial production
• Technical support
• After-sales service

Aolong also supports customers with production layout planning and equipment configuration based on intended products, capacity, density, and raw material requirements.

For more information about the company and its engineering capabilities, visit Aolong’s nonwoven equipment manufacturer page.

Why Choose a Project-Specific Bi-component Line?

Bi-component production is highly dependent on the relationship between the two polymers and the target fabric.

A standard machine configuration may not provide the same result for every polymer combination.

A project-specific approach allows the equipment supplier to evaluate:

• Raw material specifications
• Core-to-sheath ratio
• Fiber cross-section
• Target GSM
• Working width
• Production capacity
• Bonding requirements
• Fabric performance
• Factory conditions

This approach helps ensure that the extrusion, spinning, web formation, bonding, and winding systems work as one production system.

For manufacturers entering the bi-component nonwoven market, this is particularly important because the production line needs to be matched to the intended product market from the beginning.

Frequently Asked Questions About Bi-component Nonwoven Lines

What is a bi-component nonwoven line?

A bi-component nonwoven line is a production system that uses two different polymers to form a composite filament and then converts the filaments into bonded nonwoven fabric.

What is a core-sheath nonwoven production line?

A core-sheath nonwoven production line produces filaments in which one polymer forms the core and another polymer forms the surrounding sheath. The two components can perform different functions within the same filament.

What is a bicomponent spunbond machine?

A bicomponent spunbond machine is equipment designed to produce continuous spunbond filaments containing two polymer components. It normally uses separate extrusion systems and a specialized spinning system to form the required fiber structure.

What polymers can be used in a bi-component line?

The suitable polymer combination depends on the target fiber structure, melting behavior, compatibility, bonding requirements, and final application. The specific materials should be evaluated before the equipment configuration is finalized.

What are the main applications of bi-component spunbond fabric?

Bi-component spunbond fabrics are used in selected hygiene, medical, filtration, and technical nonwoven applications where a combination of strength, softness, elasticity, or controlled bonding performance is required.

How do I choose a bi-component nonwoven line?

Start with the target polymer combination, fiber structure, fabric GSM, working width, production capacity, and application. The equipment configuration should then be developed around these requirements.

Build Your Bi-component Nonwoven Production Line

Planning to manufacture high-performance bi-component nonwoven fabrics? Share your polymer combination, target fiber structure, fabric GSM, working width, production capacity, and intended application with Aolong.

Our engineering team can evaluate your requirements and recommend a suitable bi-component spunbond machine configuration, including extrusion, core-sheath spinning, web formation, bonding, and winding systems.

Request a Bi-component Nonwoven Line Proposal