Nonwovens are sheet-like structures produced by entangling fibers by mechanical, thermal or chemical means. Nonwovens differ from woven or knitted textiles in that they do not require the formation of yarn. This makes the production faster, efficient and suitable for disposable or functional products. Nonwovens are used in many industries such as medical, hygiene, filtration, automotive, agriculture and geotextiles.
Raw Materials Used in Nonwoven Fabric
Polymers
- Polypropylene (PP)
- Polyester (PET)
- Polyethylene (PE)
- Polyamide (Nylon)
Natural Fibers
- Cotton
- Bamboo fiber
- Wood pulp
Additives
- Color masterbatch
- UV stabilizers
- Hydrophilic agents
- Antistatic agents
Nonwoven Fabric Production Flowchart
Polymer Feeding → Extrusion → Fiber Formation → Web Formation → Web Bonding → Web Finishing → Winding → Slitting → Inspection → Packing
Flow varies slightly depending on the nonwoven technology (Spunbond, Meltblown, Spunlace etc.).
Detailed Production Processes
Spunbond Nonwoven Fabric Production
Spunbond is one of the most widely used nonwoven production methods, especially for applications requiring strength, durability, and cost efficiency. In this process, polymers are directly converted into continuous filaments, which are then bonded to form a fabric.
The process begins with melting polymer granules, usually polypropylene, at high temperatures. The molten polymer is then extruded through spinnerets to form fine filaments. These filaments are stretched, cooled, and deposited onto a conveyor belt, forming a uniform web. Finally, the web is bonded using heat and pressure through calendar rollers.
Process Flow
Polymer → Extruder → Spinneret → Filament Formation → Cooling → Web Laying
→ Thermal Bonding (Calender) → Winding → Slitting → Packing
Explanation of Key Steps
Polymer Extrusion: Polypropylene granules are melted in an extruder at 250–300°C.
Filament Spinning: Melt passes through spinnerets to form continuous filaments.
Filament Drawing: Cold air stretches filaments to enhance strength.
Web Formation: Fibers are deposited onto a moving belt to form a uniform web.
Thermal Bonding: Callendar rollers bond the fibers using heat and pressure.
Meltblown Nonwoven Fabric Production
Meltblown technology is mainly used for producing extremely fine fibers, making it ideal for filtration applications such as masks and air filters. This process is similar to spunbond but uses high-speed hot air to create microfibers.
In meltblown production, molten polymer is forced through a die, and high-velocity hot air blows the material into very fine fibers (typically 1–5 microns). These fibers are then collected to form a dense and soft web with excellent filtration properties.
Process Flow
Polymer → Extruder → Meltblown Die → Microfiber Formation → Web Deposition
→ Calender Bonding → Winding → Slitting → Packing
Process Description
Meltblown fibers are extremely fine (1–5 microns). High‑velocity hot air blows molten polymer streams into microfibers that form a soft, dense web ideal for filtration.
Spunlace (Hydroentangled) Nonwoven Production
Spunlace production focuses on creating soft and flexible fabrics by mechanically entangling fibers using water pressure instead of heat or chemicals. This makes the fabric feel more textile-like and suitable for skin-contact products.
In this process, fibers are first carded and laid into a web. High-pressure water jets are then applied to entangle the fibers, creating a strong yet soft fabric. After entanglement, the fabric is dried, finished, and wound.
Process Flow
Fiber Preparation → Carding → Web Laying → High-Pressure Water Jets → Drying
→ Finishing → Winding → Cutting → Packing
Process Description
High‑pressure water jets entangle fibers without chemicals, producing soft and strong fabrics for wipes, masks and medical products.
Needle-Punched Nonwoven Production
Needle punching is a mechanical bonding method used to produce thick and durable nonwoven fabrics. This process is commonly used in industrial and technical applications.
In this method, a web of fibers is repeatedly punched with barbed needles. These needles push fibers through the web layers, mechanically interlocking them to create a strong structure.
Process Flow
Fiber Preparation → Carding → Cross-Lapping → Needle Punching → Calendering
→ Finishing → Winding → Packaging
Process Description
Barbed needles repeatedly punch through the fiber web, mechanically entangling fibers into a robust structure used in geotextiles and automotive insulation.
Machinery Used in Nonwoven Production
Extrusion Line Machinery
- Extruder
- Spinneret
- Quench air system
- Conveyor belt
Bonding Machinery
- Thermal calender
- Hot air ovens
- Hydroentangling machines
- Needle punching machines
Finishing Machinery
- Embossing rollers
- Slitting and rewinding machine
- Surface treatment unit
Quality Parameters of Nonwoven Fabric
Physical Characteristics
- GSM (weight per square meter)
- Thickness
- Tensile strength
- Elongation
Functional Performance
- Absorbency
- Filtration efficiency
- Breathability
- Water repellency
Visual Properties
- Uniformity
- Softness
- Color consistency
- Bonding uniformity
Testing Standards
- ASTM standards
- ISO 9073
- EN medical standards (for SMS fabrics)
Applications of Nonwoven Fabrics
Medical & Hygiene
- Surgical masks
- N95 meltblown filters
- Surgical gowns
- Diapers and sanitary napkins
Agriculture
- Crop covers
- Mulching fabrics
Automobile
- Insulation
- Carpet backing
Geotextiles
- Soil separation
- Road construction
Household
- Wet wipes
- Shopping bags
- Tablecloths
Advantages and limitations of Nonwoven Fabric
Nonwoven fabrics offer several advantages over traditional textiles but also come with certain limitations depending on use.
Advantages include:
- High production speed and efficiency
- Lower manufacturing cost
- Lightweight yet strong
- Customizable properties
- Hygienic and suitable for disposable use
Limitations include:
- Lower durability compared to woven fabrics
- Sensitivity to high temperatures (especially PP-based)
- Limited use in high mechanical stress applications
Summary
The production of nonwoven fabric is a highly advanced and versatile manufacturing process that transforms polymers or fibres into functional fabrics without traditional weaving or knitting. Different technologies like spunbond, meltblown, spunlace and needlepunched processes are used to achieve specific properties depending on the end use requirements.
Each process has unique advantages: spunbond for strength and durability, meltblown for fine filtration performance, spunlace for softness and flexibility, and needle-punched structures for robustness for heavy-duty applications. Such systems allow manufacturers to produce fabrics with predetermined properties including strength, absorbency, breathability, and filtration efficiency.
The production process requires specialized machinery, precise process control and quality testing to satisfy industry standards like ASTM and ISO. At the same time, nonwoven fabrics are widely used across industries including medical, hygiene, automotive, agriculture and household products due to their efficiency and adaptability.
✅Simply put, nonwoven technology offers speed, flexibility and functionality, enabling manufacturers to create cost-effective, lightweight, purpose-driven fabrics for a multitude of modern applications.
