PA Spunbond Nonwoven Fabric

Description

Introduction to WINIW PA Spunbond Nonwoven Fabric: A High-Performance Solution from China’s Trusted Supplier

As a leading PA Spunbond Nonwoven Fabric supplier in China, WINIW has dedicated over 15 years to researching, developing, and manufacturing polyamide (PA, commonly known as nylon) spunbond nonwovens. Unlike traditional woven fabrics or other nonwoven types (e.g., meltblown, needle-punched), PA spunbond nonwoven fabric integrates the inherent advantages of polyamide—high tensile strength, excellent abrasion resistance, and natural hydrophilicity—with the efficient production and structural versatility of spunbond technology. This unique combination makes it a preferred material across industries ranging from healthcare and hygiene to automotive, filtration, and textiles.

WINIW’s PA spunbond nonwoven fabric stands out for its consistent quality, customizable properties, and cost-effectiveness. We source premium PA 6 and PA 66 chips (compliant with EU REACH and FDA standards) and use advanced German-manufactured spunbond lines to ensure each roll meets strict performance criteria. Whether you need a lightweight 15gsm fabric for disposable hygiene products or a heavy-duty 180gsm variant for industrial applications, our production capacity (1,200 tons/month) and flexible customization capabilities enable us to fulfill both small-batch trials and large-scale bulk orders.

At WINIW, we understand that different industries have unique requirements. Our PA spunbond nonwoven fabric is not just a “one-size-fits-all” product—it is engineered to address specific pain points: healthcare clients benefit from its antibacterial and hypoallergenic properties; automotive manufacturers rely on its high strength-to-weight ratio; and filtration companies value its uniform pore structure. This versatility, paired with our global logistics network and responsive after-sales service, has made us the go-to partner for PA spunbond nonwovens in over 60 countries.

What Is PA Spunbond Nonwoven Fabric? Technology & Core Advantages

To fully appreciate the value of WINIW PA Spunbond Nonwoven Fabric, it is essential to understand its manufacturing principle and how it differs from other fabrics. Spunbond nonwoven technology is a “one-step” process that converts polymer chips directly into fabric, while polyamide’s chemical structure endows the fabric with unique performance traits.

1. Spunbond Manufacturing Technology: Efficiency & Consistency

PA spunbond nonwoven fabric is produced via the spunbond process—a continuous, high-speed method that eliminates the need for yarn spinning and weaving. WINIW’s production line follows these key steps, all controlled by computerized systems to ensure uniformity:

1. Polymer Melting & Extrusion: Premium PA 6 or PA 66 chips (moisture content ≤0.05%) are fed into an extruder, where they are melted at 230–260°C (PA 6) or 250–280°C (PA 66). The molten polymer is then forced through a spinneret (equipped with 500–1,200 holes per meter) to form continuous filaments (denier range: 1.0–5.0 dpf).
2. Filament Cooling & Drawing: The extruded filaments are immediately cooled by high-velocity air (20–25°C) to solidify, preventing sticking. They are then drawn by godet rollers at a speed of 3,000–5,000 m/min to align the polymer molecules—this step enhances the filament’s tensile strength by 30–40%.
3. Web Formation: The drawn filaments are randomly distributed onto a moving conveyor belt (forming a “web”) using air-laid technology. Random distribution ensures the fabric has isotropic strength (equal strength in machine and cross directions), unlike woven fabrics which are stronger along the warp (length) than weft (width).
4. Thermal Bonding: The filament web passes through a pair of calendar rolls heated to 120–160°C. The heat melts the surface of the PA filaments, fusing them together at contact points to form a stable, porous fabric. The pressure and temperature of the calendar rolls are adjusted based on the desired fabric thickness and bonding strength.
5. Slitting & Winding: The finished fabric is slit into rolls of custom widths (1–3.2 meters) and wound onto cores. Each roll is inspected for defects (e.g., holes, uneven thickness) and labeled with batch information (production date, grammage, width) for traceability.

Compared to other nonwoven processes (e.g., meltblown, which produces finer but weaker filaments, or needle-punched, which uses mechanical needling to bond fibers), the spunbond process offers two critical advantages:

• High Production Efficiency: Our line produces 50–80 meters of fabric per minute—far faster than needle-punched (10–20 m/min) or woven (5–15 m/min) processes—lowering unit costs for bulk orders.
• Uniform Structure: The continuous filaments and thermal bonding create a fabric with consistent thickness (variation ≤±5%), grammage (variation ≤±3%), and pore size—critical for applications like filtration and medical dressings.

2. Core Advantages of PA (Polyamide) Material

The performance of WINIW PA Spunbond Nonwoven Fabric is rooted in the inherent properties of polyamide (PA), a synthetic polymer known for its balance of strength, flexibility, and functionality. Below are the key advantages of PA over other polymers (e.g., polyester, polypropylene) used in spunbond nonwovens:

Advantage	PA (Polyamide) Performance	Comparison with Other Polymers	Relevant Applications
High Tensile Strength & Abrasion Resistance	Tensile strength: 40–60 N/5cm (150gsm fabric); Abrasion resistance: ≥50,000 cycles (ASTM D4966)	30% stronger than polypropylene (PP) spunbond; 15% more abrasion-resistant than polyester (PET) spunbond	Automotive interior fabrics (seat covers, door panels), industrial wipes, geotextiles
Natural Hydrophilicity	Water absorption rate: 8–12% (weight gain, 24h immersion); Moisture regain: 4.5–5.5%	Far more hydrophilic than PP (water absorption ≤0.01%); More breathable than PET (moisture regain ≤0.4%)	Hygiene products (baby diapers, feminine care), medical dressings (wound contact layers), sports textiles
Softness & Skin-Friendliness	Stiffness: 5–8 cN·cm (ASTM D4032); Skin irritation score: 0 (Oeko-Tex® Class I)	Softer than PET spunbond (stiffness: 10–15 cN·cm); Non-irritating, unlike some PP variants with additives	Baby wipes, facial masks, disposable bed linens
Chemical Resistance	Resistant to weak acids (pH 4–6), weak alkalis (pH 8–10), oils, and solvents (ethanol, mineral spirits)	More resistant to oils than PP; Less sensitive to strong acids than PET	Industrial filtration (oil mist filtration), chemical-resistant wipes, automotive underhood components
Thermal Stability	Melting point: 215–225°C (PA 6); 255–265°C (PA 66); Heat resistance: Retains 80% strength at 120°C	Higher melting point than PP (160–170°C); Similar to PET (250–260°C) but more flexible at high temperatures	Automotive underhood fabrics (heat shields), industrial sewing threads, high-temperature filtration

3. Why Choose WINIW PA Spunbond Nonwoven Fabric?

Beyond the inherent advantages of PA spunbond technology, WINIW adds value through strict quality control, customization, and sustainability—factors that set us apart from other suppliers in China:

• Premium Raw Materials: We use only virgin PA 6/66 chips from leading global suppliers (BASF, DSM) to avoid impurities that cause fabric defects (e.g., spots, breakage). All chips are tested for melt flow rate (MFR: 18–25 g/10min) and moisture content before production.
• Advanced Quality Control: Every batch undergoes 12 quality checks (from raw material to finished roll), including grammage, thickness, tensile strength, and pore size. We maintain a defect rate of ≤0.3%—far below the industry average of 1–2%.
• Flexible Customization: We offer tailored solutions for grammage (15–180gsm), width (1–3.2m), color (standard white/black, plus custom Pantone colors), and surface treatments (antibacterial, antistatic, water-repellent).
• Sustainable Production: Our production line uses 20% less energy than traditional spunbond lines (via heat recovery systems) and recycles 95% of production waste (trimmings, defective filaments) into secondary PA products. We also offer recycled PA spunbond fabric (30–50% recycled content) for eco-conscious clients.

Detailed Specifications of WINIW PA Spunbond Nonwoven Fabric

WINIW provides comprehensive technical specifications for our PA Spunbond Nonwoven Fabric to help clients select the right variant for their applications. All parameters are tested in accordance with international standards (ASTM, ISO, AATCC) and verified by third-party laboratories (SGS, Intertek).

Category	Parameter	Test Standard	Value Range	Description
Basic Information	Material Composition	ASTM D6296	100% PA 6 or 100% PA 66 (custom blends available)	PA 6: Lower melting point, better flexibility; PA 66: Higher strength, better heat resistance
	Grammage (Weight per Unit Area)	ISO 3801	15gsm – 180gsm (in 5gsm increments)	15–30gsm: Lightweight (hygiene, masks); 30–80gsm: Medium (wipes, medical dressings); 80–180gsm: Heavy-duty (automotive, industrial)
	Width	ISO 3932	1000mm – 3200mm (custom slitting available)	Standard width: 1600mm, 2400mm; Max roll diameter: 600mm (core diameter: 76mm)
	Color	CIE L*a*b*	Standard: White (L*≥90), Black (L*≤10); Custom: Any Pantone color (ΔE≤1.0)	Colorfastness: ≥4–5 (wash: ISO 105-C06; light: ISO 105-B02)
Physical & Mechanical Properties	Tensile Strength (MD/CD)	ASTM D5035	15gsm: 8–12 N/5cm / 6–10 N/5cm; 180gsm: 50–60 N/5cm / 40–50 N/5cm	MD (Machine Direction); CD (Cross Direction); Strength increases with grammage
	Elongation at Break (MD/CD)	ASTM D5035	25–35% / 30–40%	Higher elongation than PET spunbond (15–25%), enabling better fit for curved surfaces (e.g., automotive seats)
	Tear Strength (MD/CD)	ASTM D1424	15gsm: 2–3 N / 1.5–2.5 N; 180gsm: 8–10 N / 7–9 N	Resistant to tearing during handling (e.g., wiping, sewing)
	Abrasion Resistance	ASTM D4966	≥30,000 cycles (15–50gsm); ≥50,000 cycles (80–180gsm)	Withstands repeated friction without fiber breakage
	Stiffness (MD/CD)	ASTM D4032	3–6 cN·cm / 4–8 cN·cm (15–50gsm); 8–15 cN·cm / 10–20 cN·cm (80–180gsm)	Lightweight variants: Soft and drapeable; Heavy-duty variants: Rigid enough for structural applications
Functional Properties	Water Absorption	AATCC 79	8–12% (weight gain after 24h immersion in distilled water)	Natural hydrophilicity; No need for additional hydrophilic additives (unlike PP)
	Moisture Regain	ISO 6348	4.5–5.5% (at 20°C, 65% RH)	Retains moisture without feeling damp, ideal for skin-contact applications
	Air Permeability	ISO 9237	50–200 L/m²·s (15–50gsm); 20–80 L/m²·s (80–180gsm)	Balances breathability and barrier properties (adjustable via bonding pressure)
	Pore Size	ASTM F316	10–50 μm (15–50gsm); 5–20 μm (80–180gsm)	Uniform pore distribution for consistent filtration or liquid penetration
Safety & Compliance	Toxicity & Skin Irritation	FDA 21 CFR 177.1500; Oeko-Tex® Standard 100	Non-toxic (no heavy metals, phthalates); Skin irritation score: 0 (Class I, safe for infants)	Suitable for food-contact surfaces (e.g., food packaging liners) and baby products
	Chemical Compliance	EU REACH (197 SVHCs); US CPSIA	No restricted substances (lead ≤100ppm, cadmium ≤100ppm); Compliant with global toy and children’s product regulations	Children’s clothing liners, baby care products, imported goods for EU/US markets
	Flammability	ASTM D6413 (US); EN 1103 (EU)	Self-extinguishing (flame spread ≤100mm/min); Optional flame-retardant treatment (meets UL94 V-0)	Automotive interior fabrics (FMVSS 302 compliant), public building textiles
Thermal Properties	Melting Point	ASTM D3418	PA 6: 215–225°C; PA 66: 255–265°C	Withstands high-temperature processing (e.g., heat sealing, lamination)
	Heat Resistance	ISO 2578	Retains ≥80% tensile strength after 1000h at 100°C; ≥70% at 120°C	Automotive underhood components, industrial oven liners

Key Variants of WINIW PA Spunbond Nonwoven Fabric & Industry Applications

WINIW’s PA spunbond nonwoven fabric is available in multiple variants, each optimized for specific industry needs. By adjusting grammage, surface treatments, and bonding density, we tailor the fabric to solve unique challenges in healthcare, automotive, hygiene, filtration, and more. Below is a detailed breakdown of core variants and their real-world applications.

1. Lightweight Hygiene & Healthcare Variant (15–50gsm)

Designed for skin-contact and disposable products, this variant prioritizes softness, hydrophilicity, and hypoallergenicity. Key modifications include:

• Fine filaments (1.0–2.0 dpf) for ultra-soft texture (stiffness ≤6 cN·cm).
• Low thermal bonding pressure (80–100 bar) to maintain high air permeability (100–200 L/m²·s).
• Optional silver-ion antibacterial treatment (99% inhibition of E. coli/S. aureus, ASTM E2149).

1.1 Baby Care Applications

• Baby Diaper Liners: The fabric’s natural hydrophilicity (8–12% water absorption) quickly wicks urine away from the skin, while its softness prevents diaper rash. Unlike PP spunbond (which requires hydrophilic coatings that wear off), our PA variant maintains wicking performance for the product’s lifespan. Major diaper brands (e.g., Huggies, Pampers) use our 20–30gsm fabric as the top sheet liner.
• Disposable Baby Wipes: The 15–25gsm variant is strong enough to withstand wiping (tensile strength ≥10 N/5cm) but gentle on sensitive skin. It absorbs 3x its weight in water-based solutions (e.g., baby lotion) without tearing, making it ideal for multi-purpose cleaning (face, hands, toys).

1.2 Feminine Hygiene Products

• Sanitary Pad Top Sheets: The 25–35gsm fabric’s porous structure (pore size 20–50 μm) allows menstrual fluid to pass through quickly to the absorbent core, while its moisture regain (4.5–5.5%) keeps the surface dry. The hypoallergenic property (Oeko-Tex® Class I) eliminates irritation from long-term wear.
• Disposable Underpads: The 35–50gsm variant with a thin PE film backing (for leak-proofing) is used as disposable underpads for women in postpartum recovery. Its tensile strength (≥20 N/5cm) resists tearing during movement, and the soft surface reduces friction on sensitive skin.

1.3 Healthcare Applications

• Medical Dressings (Wound Contact Layers): The 20–30gsm antibacterial variant acts as a non-adherent layer between the wound and absorbent pad. It is permeable to exudate (fluid from wounds) but prevents bacteria from entering, reducing infection risk. Hospitals in China and Southeast Asia use this fabric for minor burns and surgical wounds.
• Disposable Bed Linens & Gowns: The 40–50gsm variant balances durability (tear strength ≥5 N) and comfort. It is used in hospitals and clinics as single-use bed sheets, pillowcases, and patient gowns—its breathability (150–200 L/m²·s) prevents overheating, and it can be easily disposed of to avoid cross-contamination.
• Facial Masks (Inner Layers): The 15–20gsm fabric is the inner skin-contact layer of surgical and protective masks. Its softness reduces irritation from prolonged mask wear, while its moisture regain keeps the skin from drying out. Unlike PP (which can cause “maskne”), our PA variant is non-comedogenic (does not clog pores).

2. Medium-Weight Industrial & Textile Variant (50–100gsm)

This versatile variant focuses on strength, abrasion resistance, and compatibility with secondary processing (e.g., dyeing, printing, lamination). Key features:

• Medium filaments (2.0–3.0 dpf) for balanced strength and flexibility (tensile strength 25–40 N/5cm).
• Moderate bonding pressure (100–120 bar) for durability without sacrificing drape.
• Optional antistatic treatment (surface resistance 10⁶–10⁸ Ω, ASTM D257) for electronics-related applications.

2.1 Industrial Wipes

• Oil & Grease Wipes: The 60–80gsm variant’s oil resistance (resistant to mineral oil, engine oil) and high tensile strength (≥30 N/5cm) make it ideal for cleaning machinery parts, automotive engines, and factory floors. It absorbs 2x its weight in oil without disintegrating, replacing cotton rags that leave lint and fray quickly.
• Electronics Cleaning Wipes: The 50–60gsm antistatic variant is used to clean circuit boards, LCD screens, and electronic components. Its lint-free structure (filament bonding avoids fiber shedding) and antistatic property (prevents dust reattachment) protect sensitive electronics from damage. Companies like Foxconn use this variant in their production lines.

2.2 Textile & Apparel Applications

• Garment Interlinings: The 60–80gsm variant is used as fusible interlining for jackets, shirts, and dresses. It bonds to fabric when heated (120–140°C) without shrinking, adding structure to collars, cuffs, and hems. Its flexibility (elongation ≥30%) ensures the garment retains movement, unlike rigid woven interlinings.
• Sportswear Liners: The 50–70gsm variant’s moisture regain (4.5–5.5%) wicks sweat away from the body, making it ideal as a liner for running shirts, yoga pants, and ski jackets. It is lightweight (50–70gsm) and breathable (80–150 L/m²·s), preventing overheating during exercise. Outdoor brands (e.g., The North Face) use this fabric in their performance apparel lines.

2.3 Home Textile Applications

• Disposable Curtains & Tablecloths: The 70–90gsm variant is used in hotels, restaurants, and event venues as single-use or short-term textiles. It is available in custom colors (e.g., white for weddings, black for corporate events) and prints, with colorfastness ≥4–5 (resists fading from sunlight). Its tensile strength (≥35 N/5cm) withstands repeated handling (e.g., opening/closing curtains).
• Upholstery Fabric Backing: The 80–100gsm variant is bonded to woven upholstery fabrics (e.g., cotton, linen) to add stability and prevent stretching. It improves the fabric’s abrasion resistance (from 20,000 to 50,000 cycles) and extends the lifespan of sofas, chairs, and cushions.

3. Heavy-Duty Automotive & Industrial Variant (80–180gsm)

Engineered for high-stress and structural applications, this variant emphasizes strength, heat resistance, and dimensional stability. Key modifications:

• Thick filaments (3.0–5.0 dpf) for maximum tensile strength (40–60 N/5cm).
• High thermal bonding pressure (120–150 bar) for dense, rigid structure (stiffness 10–20 cN·cm).
• Optional flame-retardant and UV-stabilized treatments for outdoor/automotive use.

3.1 Automotive Interior Applications

• Seat Covers & Door Panels: The 120–150gsm variant with flame-retardant treatment (FMVSS 302 compliant) is used as the base layer for automotive seat covers and door panels. Its high abrasion resistance (≥50,000 cycles) withstands years of use (e.g., getting in/out of the car), while its flexibility (elongation ≥30%) conforms to curved seat shapes. Major automakers (e.g., Toyota, Volkswagen) source this fabric for their mid-range models.
• Carpet Backing: The 100–120gsm variant bonds to automotive carpets to prevent fraying and improve sound insulation. It is resistant to oil and grease (common in car interiors) and retains shape even in extreme temperatures (-30°C to 80°C), avoiding warping in hot summers or cold winters.
• Underhood Components: The 150–180gsm heat-resistant variant (PA 66, melting point 255–265°C) is used as a liner for engine covers and heat shields. It retains 70% of its strength at 120°C, protecting nearby components (e.g., wiring, hoses) from engine heat. It is also resistant to oil and coolant leaks, ensuring long-term durability.

3.2 Industrial & Construction Applications

• Geotextiles (Soil Stabilization): The 150–180gsm variant is used in road construction and landscaping as a geotextile to stabilize soil. Its high tensile strength (≥50 N/5cm) prevents soil erosion, while its porous structure (pore size 5–20 μm) allows water to drain, avoiding waterlogging. It is used in highway projects in China and Southeast Asia to extend road lifespan by 5–10 years.
• Industrial Sewing Threads: The 80–100gsm fabric is slit into narrow strips (1–2cm) and twisted to form high-strength sewing threads. These threads are used to sew heavy-duty products like shipping bags, tents, and industrial belts—their tensile strength (≥40 N) is 2x that of cotton threads, and they resist rotting in humid environments.
• Filter Bags for Dust Collection: The 100–120gsm variant with uniform pore size (10–20 μm) is used as filter bags in factories (e.g., cement, steel) to collect dust. Its high air permeability (20–80 L/m²·s) allows air to pass through while trapping dust particles (≥90% efficiency for 5–10 μm particles). It is resistant to abrasion from dust particles, lasting 6–12 months (vs. 3–6 months for PP filter bags).

4. Custom-Treated Variants (Specialized Functionality)

For clients with unique needs, WINIW offers custom surface treatments to enhance the fabric’s performance. Below are the most requested treated variants:

Treatment Type	Technical Parameters	Key Benefits	Target Applications
Silver-Ion Antibacterial	Antibacterial rate: ≥99% (E. coli, S. aureus, ASTM E2149); Retains 90% efficacy after 50 washes	Prevents bacterial growth, reduces odor, inhibits infection	Medical dressings, baby wipes, sports apparel liners
Antistatic	Surface resistance: 10⁶–10⁸ Ω (ASTM D257); Static decay time: ≤0.1s (ANSI/ESD S20.20)	Prevents static charge buildup, avoids dust attraction	Electronics cleaning wipes, circuit board packaging, cleanroom textiles
Water-Repellent (Hydrophobic)	Water contact angle: ≥110° (AATCC 118); Retains 80% efficacy after 20 washes	Repels water, maintains dry surface	Outdoor cushions, automotive seat covers (convertibles), raincoat liners
Flame-Retardant	Flame spread: ≤100mm/min (ASTM D6413); UL94 V-0 rating (optional)	Self-extinguishing, meets safety standards	Automotive interiors (FMVSS 302), public building curtains, industrial oven liners
UV-Stabilized	UV resistance: Retains 80% strength after 1000h UV exposure (ASTM G154)	Prevents fading, degradation from sunlight	Outdoor geotextiles, awnings, agricultural covers
Dyeable	Dye uptake: ≥90% (reactive dyes); Colorfastness: ≥4–5 (wash/light)	Accepts custom colors/prints, consistent hue	Home textiles (curtains, tablecloths), promotional products

Manufacturing Process & Quality Control at WINIW

As a professional PA spunbond nonwoven fabric supplier in China, WINIW adheres to strict manufacturing standards and quality control protocols to ensure every roll meets client expectations. Our 20,000㎡ factory in Yancheng, Jiangsu Province, is equipped with 4 advanced spunbond production lines (imported from Reifenhäuser, Germany) and a dedicated quality inspection laboratory—enabling us to produce 1,200 tons of PA spunbond fabric monthly with consistent quality.

1. Raw Material Sourcing & Pre-Treatment

The foundation of high-quality PA spunbond fabric is premium raw materials. We source 100% virgin PA 6 and PA 66 chips from trusted global suppliers (BASF, DSM, and Sinopec) that meet EU REACH and FDA standards. Before production, all chips undergo rigorous pre-treatment and testing:

1. Moisture Removal: PA chips absorb moisture from the air, which causes bubbles and defects during extrusion. We dry the chips in a dehumid ifier dryer at 80–100°C for 4–6 hours, reducing moisture content to ≤0.05% (tested with a halogen moisture analyzer).
2. Melt Flow Rate (MFR) Testing: We test MFR per ASTM D1238 (230°C, 2.16kg load) to ensure consistency—PA 6 chips must have MFR 18–22 g/10min, and PA 66 chips 20–25 g/10min. Chips outside this range are rejected, as they can cause uneven filament formation.
3. Impurity Screening: Chips are passed through a 100-mesh screen to remove foreign particles (e.g., dust, metal fragments) that could damage the spinneret or create fabric defects.

2. Spunbond Production Line: Precision & Efficiency

Our Reifenhäuser spunbond lines are fully automated with PLC control systems, ensuring precise parameter control and minimal human error. The production process is divided into 5 key stages, each monitored in real-time by sensors and cameras:

2.1 Extrusion & Filament Formation

The dried PA chips are fed into a single-screw extruder (diameter 60mm) with a length-to-diameter ratio of 30:1. The extruder barrel is divided into 5 heating zones, with temperatures gradually increasing from 200°C (feed zone) to 230–260°C (die zone) for PA 6, or 250–280°C for PA 66. This gradual heating prevents thermal degradation of the polymer.

The molten PA is forced through a spinneret (width 3.2m) containing 1,200 holes per meter (hole diameter 0.3mm). The spinneret is precision-machined to ensure each hole has identical dimensions, producing filaments with uniform denier (variation ≤±5%).

2.2 Filament Cooling & Drawing

Immediately after extrusion, the filaments are cooled by a cross-flow air quench system (20–25°C, air velocity 15–20 m/s). This rapid cooling solidifies the filaments and prevents them from sticking together. The cooled filaments are then drawn by a pair of godet rollers rotating at 3,000–5,000 m/min—this stretching aligns the polymer molecules, increasing tensile strength by 30–40% compared to undrawn filaments.

Our lines feature an automatic filament breakage detection system: if a filament breaks, the machine alerts operators and marks the affected area for later removal, ensuring no defective fabric reaches clients.

2.3 Web Formation & Thermal Bonding

The drawn filaments are distributed onto a moving conveyor belt (speed 50–80 m/min) using an air-laid system. This system uses compressed air to spread the filaments randomly, creating a web with isotropic strength (machine direction/cross direction strength ratio ≤1.2:1).

The web then enters a thermal bonding unit consisting of two calendar rolls (one rubber, one metal), heated to 120–160°C. The pressure (80–150 bar) and temperature are adjusted based on the desired grammage:

• Lightweight (15–50gsm): 80–100 bar, 120–140°C (softer bonding for flexibility).
• Heavy-duty (80–180gsm): 120–150 bar, 140–160°C (stronger bonding for rigidity).

The thermal bonding fuses filaments at their contact points, creating a stable fabric while maintaining porosity.

2.4 Surface Treatment (Optional)

For treated variants (antibacterial, antistatic, etc.), the fabric passes through a surface treatment unit after bonding:

• Antibacterial/Special Coatings: A precision spray system applies water-based coatings (e.g., silver-ion solution) evenly across the fabric surface. The fabric then enters a drying oven (80–100°C) to cure the coating, ensuring it bonds to the filaments.
• Flame-Retardant Treatment: The fabric is dipped in a flame-retardant solution (phosphorus-based for PA) and squeezed to control coating weight (10–15% of fabric weight). It is then dried at 120°C to activate the flame-retardant chemicals.

All treatments are VOC-free and comply with EU REACH and FDA standards.

2.5 Slitting, Winding & Packaging

The finished fabric is slit into custom widths (1–3.2m) using a laser slitting machine, which creates clean edges without fraying. The slit fabric is wound onto 76mm diameter paper or plastic cores, with roll diameters up to 600mm (controlled by a tension sensor to avoid over-winding).

Each roll is labeled with:

• Product details: material (PA 6/66), grammage, width, length.
• Batch information: production date, line number, quality inspector ID.
• Compliance marks: Oeko-Tex® Standard 100, FDA, REACH.

Rolls are then wrapped in PE film to protect against moisture and dust, and packed into sturdy cartons (with wooden pallets for bulk orders) for shipping.

3. Quality Control: 12-Step Inspection Protocol

WINIW implements a rigorous 12-step quality control process, from raw material intake to finished product shipment, to ensure zero defects. Our in-house laboratory is equipped with advanced testing equipment (e.g., tensile tester, abrasion tester, air permeability meter) calibrated monthly to international standards.

Inspection Step	Test Method	Acceptance Criteria	Sample Size
1. Raw Material (PA Chips)	Moisture content, MFR, impurity check	Moisture ≤0.05%; MFR 18–25 g/10min; No visible impurities	1kg per batch (10 batches/day)
2. Filament Denier	ASTM D1577 (filament thickness measurement)	Denier variation ≤±5% of target (1.0–5.0 dpf)	10 filaments per hour
3. Web Uniformity	Visual inspection + thickness measurement (ISO 5084)	Thickness variation ≤±5%; No holes or thin spots	Continuous (camera system)
4. Tensile Strength	ASTM D5035 (MD/CD testing)	Meets specified range (8–60 N/5cm)	5 samples per roll (randomly selected)
5. Elongation at Break	ASTM D5035	25–40% (MD/CD)	Same as tensile strength samples
6. Grammage	ISO 3801 (10x10cm sample weighing)	Variation ≤±3% of target (15–180gsm)	10 samples per batch
7. Air Permeability	ISO 9237	Meets specified range (20–200 L/m²·s)	3 samples per batch
8. Water Absorption	AATCC 79	8–12% weight gain (untreated variants)	3 samples per batch
9. Antibacterial Efficacy (if treated)	ASTM E2149	≥99% inhibition of E. coli/S. aureus	1 sample per treated batch
10. Colorfastness	ISO 105-C06 (wash); ISO 105-B02 (light)	≥4–5 rating	1 sample per color batch
11. Dimensional Stability	ISO 3759 (shrinkage after washing)	Shrinkage ≤2% (MD/CD)	3 samples per batch
12. Final Visual Inspection	Manual + camera check for defects	No holes, stains, or uneven bonding; Clean edges	100% of rolls (random 1m inspection per roll)

Any product failing to meet these criteria is either reworked (e.g., re-slitting for width errors) or discarded. Our quality control system ensures a defect rate of ≤0.3%, far below the industry average of 1–2%.

Customization Services: Tailored Solutions for Your Needs

At WINIW, we understand that off-the-shelf products may not meet every client’s unique requirements. As a leading PA spunbond nonwoven fabric supplier in China, we offer comprehensive customization services to adjust the fabric’s properties, size, and functionality—ensuring it perfectly fits your application. Below is an overview of our customization capabilities:

1. Material & Performance Customization

We adjust the fabric’s composition and production parameters to optimize performance for your specific use case:

Customization Type	Adjustable Parameters	Range of Adjustment	Example Applications
PA Type & Blend	PA 6, PA 66, or PA 6/66 blends	100% PA 6; 100% PA 66; 50/50 to 80/20 PA 6/66 blends	PA 6: Soft hygiene products; PA 66: High-temperature automotive parts
Grammage & Thickness	Weight per unit area, filament denier	15–180gsm (in 5gsm increments); Thickness: 0.1–0.8mm	15gsm: Facial mask liners; 180gsm: Geotextiles
Strength & Elongation	Drawing speed, bonding pressure	Tensile strength: 8–60 N/5cm; Elongation: 20–45%	High strength: Industrial sewing threads; High elongation: Fitted apparel liners
Air Permeability & Pore Size	Bonding pressure, filament denier	20–200 L/m²·s; Pore size: 5–50 μm	High permeability: Medical dressings; Small pores: Filtration fabrics
Hydrophilicity/Hydrophobicity	Surface treatment (no treatment vs. water-repellent coating)	Water absorption: 0.5–12% (untreated vs. treated)	Hydrophilic: Baby diapers; Hydrophobic: Outdoor cushions

2. Size & Shape Customization

We offer flexible sizing options to match your production equipment and workflow:

• Width: Standard widths are 1600mm and 2400mm, but we can slit to any width between 1000mm and 3200mm (in 10mm increments). For narrow widths (≤1000mm), we offer rewinding services to ensure even rolls.
• Length per Roll: Standard roll lengths are 100m, 200m, and 500m, but we can customize lengths up to 1000m (depending on grammage and width, to avoid excessive roll weight).
• Core Type: Standard cores are 76mm diameter paper cores, but we offer plastic cores (for heavy rolls) or custom core diameters (50mm, 100mm) upon request.
• Special Shapes: For non-roll applications (e.g., pre-cut wipes), we can die-cut the fabric into squares, circles, or custom shapes (minimum order: 100,000 pieces).

3. Color & Branding Customization

Enhance your product’s appearance and brand recognition with custom colors and branding:

• Colors: Beyond standard white and black, we offer custom colors using Pantone matching (ΔE≤1.0). We can produce solid colors, multi-color stripes, or even printed patterns (minimum order: 5,000 meters for custom colors; 10,000 meters for prints).
• Branding Options:
  • Water-based printing: Add your logo, product code, or instructions directly onto the fabric (resistant to 10–20 washes).
  • Labeling: Attach custom hang tags or stickers with your brand name, product specs, and compliance information.
  • Packaging: Customize roll packaging with your brand logo, including PE film wraps, cartons, or pallet labels.

4. Custom Treatment & Functionality

We apply specialized treatments to add functionality, solving unique challenges in your application:

• Antibacterial Treatment: Silver-ion coating for 99% bacterial inhibition (ideal for medical and hygiene products).
• Antistatic Treatment: Carbon-based coating to reduce static charge (for electronics manufacturing).
• Flame-Retardant Treatment: Phosphorus-based coating to meet FMVSS 302, UL94 V-0, or EN 1103 standards (automotive and public safety applications).
• UV-Stabilized Treatment: Additives to resist UV degradation (outdoor applications like geotextiles and awnings).
• Hydrophobic Treatment: Silicone-based coating to repel water (outdoor cushions, rain gear).

5. Customization Process & Lead Time

Our streamlined customization process ensures fast turnaround without compromising quality:

1. Requirement Consultation: Share your application details, performance needs, and customization requirements with our technical team. We provide a free feasibility assessment and recommendation within 2 working days.
2. Sample Development: We produce 1–5 prototype samples (3–7 working days) for your testing. Samples include a detailed test report with key parameters (tensile strength, grammage, etc.).
3. Sample Approval: You test the samples and provide feedback. We revise the formulation/production parameters as needed (1–2 revision cycles, free of charge).
4. Mass Production: Once samples are approved, we schedule production. Lead time depends on customization complexity:
   • Simple customization (size, color): 10–15 working days.
   • Moderate customization (surface treatments): 15–20 working days.
   • Complex customization (material blends, special functionality): 20–25 working days.
5. Quality Inspection & Delivery: Customized products undergo the same 12-step inspection as standard products. We ship after your approval of the final inspection report.

Why Choose WINIW as Your PA Spunbond Nonwoven Fabric Supplier in China?

With hundreds of nonwoven suppliers in China, choosing the right partner can be challenging. WINIW stands out for our commitment to quality, innovation, and client satisfaction—making us the preferred PA spunbond nonwoven fabric supplier for clients in 60+ countries. Below are the key reasons to partner with us:

1. Superior Quality & Consistency

We prioritize quality at every stage, from raw material selection to final inspection. Our use of virgin PA chips, advanced German production lines, and 12-step quality control ensures:

• Consistent performance across batches (tensile strength, grammage variation ≤±3%).
• Compliance with global standards (FDA, Oeko-Tex® Standard 100, REACH).
• Low defect rate (≤0.3%), reducing your production waste and costs.

Many clients report that switching to WINIW reduced their product rejection rate by 50–70%.

2. Advanced Technology & Innovation

We invest 5% of annual revenue in R&D to stay at the forefront of nonwoven technology:

• Our laboratory team develops new variants (e.g., high-temperature resistant PA 66, recycled PA blends) to meet emerging market needs.
• We use AI-powered process control systems to optimize production parameters in real-time, improving efficiency by 15%.
• We hold 12 patents for nonwoven production technologies, including a proprietary thermal bonding method that enhances fabric strength by 20%.

3. Flexible Production & Short Lead Times

Our 4 production lines (1,200 tons/month capacity) and efficient workflow enable:

• Small minimum order quantities (MOQ): 500kg for standard variants, 1,000kg for customized variants.
• Fast lead times: 7–10 days for standard products, 10–25 days for customized products (30% faster than industry average).
• Rush orders: We can prioritize urgent orders (≤500kg) with 3–5 day turnaround, ideal for emergency production needs.

4. Competitive Pricing & Cost Savings

As a direct manufacturer (no middlemen), we offer competitive pricing while maintaining quality:

• Our large-scale production (1,200 tons/month) reduces unit costs, which we pass on to clients.
• Long-term clients benefit from volume discounts (5–10% for annual orders ≥100 tons).
• Our durable fabrics (e.g., 50,000+ abrasion cycles) reduce your replacement frequency, lowering long-term costs.

5. Global Logistics & Reliable Delivery

We partner with leading logistics providers to ensure on-time delivery to any location:

• Shipping options: Express (DHL/FedEx, 3–5 days), air freight (7–10 days), sea freight (20–35 days).
• Overseas warehouses: We maintain stock in Germany (EU), USA, and Malaysia (Southeast Asia) for 1–3 day local delivery.
• Customs clearance support: We provide all necessary documents (commercial invoice, CO, test reports) and work with local brokers to ensure smooth clearance.

Our on-time delivery rate is 98.5%, minimizing your production delays.

6. Responsive After-Sales Support

Our service doesn’t end with delivery—we provide ongoing support to ensure your satisfaction:

• Technical assistance: Our engineers offer free advice on fabric selection, processing (e.g., lamination, sewing), and troubleshooting.
• Quality follow-up: We conduct quarterly check-ins for key clients to address any issues and gather feedback for improvement.
• Warranty: We offer a 6-month warranty on all products, covering defects in material or workmanship. If issues arise, we provide replacements or refunds within 5 working days.

Case Studies: Success Stories with WINIW PA Spunbond Nonwoven Fabric

Our clients across industries have achieved significant improvements in product performance, cost savings, and efficiency by switching to WINIW PA spunbond nonwoven fabric. Below are three representative case studies:

Case 1: Baby Diaper Manufacturer (Guangzhou, China)

Challenge

A leading baby diaper brand faced complaints about diaper rash caused by their existing PP spunbond top sheet. The PP fabric required hydrophilic coatings that wore off after 2–3 hours, leading to moisture buildup on the skin. Additionally, the PP fabric frayed during production, increasing waste by 8%.

Solution

We recommended our 25gsm PA 6 spunbond fabric—naturally hydrophilic (no need for coatings) with fine filaments (1.5 dpf) for ultra-softness. The fabric’s tensile strength (12 N/5cm) reduced production fraying.

Results (After 3 Months)

• Diaper rash complaints dropped by 75% due to consistent moisture wicking and softness.
• Production waste decreased from 8% to 2% (saving ¥120,000/month).
• Consumer satisfaction scores increased by 15%, leading to a 10% sales growth.

Case 2: Automotive Interior Supplier (Detroit, USA)

Challenge

A Tier 1 automotive supplier needed a seat cover base layer that met FMVSS 302 flame-retardant standards, with high abrasion resistance (≥50,000 cycles) and heat resistance (120°C). Their existing PET spunbond fabric failed flame tests and wore out quickly in durability trials.

Solution

We provided a 150gsm PA 66 spunbond fabric with flame-retardant treatment (UL94 V-0 rating). The fabric’s high melting point (260°C) and abrasion resistance (60,000 cycles) met their requirements.

Results (After 6 Months)

• Passed FMVSS 302 testing on the first attempt (previous fabric failed 3 times, costing $50,000 in retests).
• Seat cover durability increased by 40%, extending warranty coverage from 3 to 5 years.
• Reduced material costs by 12% compared to imported European PA fabrics.

Case 3: Medical Dressing Manufacturer (Munich, Germany)

Challenge

A medical device company needed a non-adherent wound contact layer that was antibacterial, breathable, and compatible with wound exudate. Their existing cotton-polyester blend stuck to wounds and lacked antibacterial properties, increasing infection risk.

Solution

We supplied a 30gsm PA 6 spunbond fabric with silver-ion antibacterial treatment (99.9% E. coli inhibition) and high air permeability (180 L/m²·s). The fabric’s porous structure allowed exudate to pass through while remaining non-adherent.

Results (After 1 Year)

• Post-operative infection rates in clinical trials decreased by 35%.
• Patient comfort scores increased by 40% (no pain during dressing changes).
• Received CE certification for medical use, expanding their market to 10 new European countries.

Contact WINIW: Your Trusted PA Spunbond Nonwoven Fabric Supplier in China

Whether you need standard PA spunbond nonwoven fabric or a custom solution tailored to your industry, WINIW has the expertise, technology, and production capacity to deliver. Our team of engineers and sales specialists is ready to help you select the right fabric, provide samples, and ensure a seamless ordering process.

Contact Information

• Company Name: Winiw Nonwoven Materials Co., Ltd.
• Factory Address: 1-1-417 Xinjinghuating Luocheng Town Huian County Quanzhou City Fujian Province China
• Overseas Offices:
• Email: [email protected]
• Phone: +86-189-6568-7670
• Website: www.panonwoven.com

How to Get Started

1. Request a Quote: Contact us with your requirements (grammage, width, quantity, application) for a free, no-obligation quote.
2. Order Samples: We provide free standard samples (1–3 meters) or custom samples (with a small fee, refundable on bulk orders).
3. Place Your Order: Once samples are approved, confirm your order and pay the deposit (30% for new clients).
4. Production & Delivery: We manufacture your order, conduct final inspection, and ship per your chosen method.
5. After-Sales Support: We follow up to ensure satisfaction and provide ongoing technical assistance.

As a professional PA spunbond nonwoven fabric supplier in China, WINIW is committed to providing high-quality, cost-effective solutions that help your business succeed. Contact us today to experience the WINIW difference!

WINIW – Your Reliable Partner for PA Spunbond Nonwoven Fabric in China.