Wet Laid Nonwoven Fabric — High-Performance Industrial Non Woven Cloth
Custom wet-laid nonwoven fabric in carbon, polyimide, basalt, PPS, aramid, nickel-coated carbon, quartz, glass & hybrid fibers. 4-700gsm, high temperature & chemical resistance. OEM available. China manufacturer.
Product Introduction
Our wet-laid nonwoven fabrics represent a specialized category of engineered textile materials produced through an advanced papermaking-like process. Unlike traditional weaving or knitting methods, the wet-laid technique disperses short-cut fibers uniformly in a liquid suspension, forming a cohesive, isotropic fiber mat that is subsequently bonded and dried. This unique manufacturing process delivers exceptional fiber dispersion uniformity, precise thickness control, and superior mechanical isotropy compared to dry-laid or spunbond alternatives.
The wet-laid process enables the production of ultra-lightweight veils as low as 4gsm, ultra-thin felts with excellent fiber dispersion, and customizable binder formulations including acrylic, PVA (Polyvinyl alcohol), aqueous epoxy, and co-polyester systems. The resulting nonwoven materials offer outstanding porosity control, surface finish quality, and compatibility with subsequent composite processing steps such as hand lay-up, filament winding, resin infusion, and pultrusion.
Key Manufacturing Capabilities
• Area Weight Range: 4 gsm to 710 gsm
• Thickness Range: 0.05 mm to 0.76 mm
• Fiber Types: Carbon, Polyimide, Basalt, PPS, Aramid, Nickel-Coated Carbon, Quartz, Glass, Hybrid Blends
• Binder Options: Acrylic, PVA, Epoxy, Co-Polyester, Thermosetting Resins
• Custom Widths & Roll Lengths Available
• OEM / Make-to-Order Manufacturing
Why Choose Wet-Laid Technology?
The wet-laid process ensures superior fiber dispersion and uniformity compared to air-laid or carded nonwovens, resulting in consistent mechanical properties across both machine direction (MD) and cross direction (CD). This makes wet-laid nonwovens ideal for precision applications requiring reproducible performance, such as composite surfacing veils, electrical insulation papers, filtration media, and EMI shielding layers.
Fiber-Specific Product Lines
2.1 Carbon Fiber Wet-Laid Nonwoven
Carbon fiber wet-laid nonwovens are manufactured from PAN-based short-cut carbon fibers (fiber diameter: 6–7 μm, length: 6 mm) randomly oriented and bonded with acrylic, PVA, or epoxy binder systems. The material features a multi-layer microporous network structure that provides exceptional uniformity, electrical conductivity, and mechanical reinforcement capabilities.
Parameter | Specification |
Fiber Type | PAN-based Carbon Fiber |
Fiber Diameter | 6–7 μm |
Fiber Length | 6 mm |
Area Weight Range | 4–50 g/m² (ultra-lightweight 4 gsm available) |
Thickness Range | 0.05–0.50 mm |
Binder Content | 3–20% (customizable) |
Surface Resistivity | ≤3–15 Ω (varies by grade) |
Tensile Strength (MD) | ≥5–40 N/50mm (grade-dependent) |
Key Applications
• EMI shielding and electrostatic protection layers for electronic components
• Antistatic layers for oil/gas pipelines and chemical storage tanks
• Surface optimization and surfacing veil for carbon fiber reinforced plastics (CFRP)
• GDL (Gas Diffusion Layer) base material for fuel cells and batteries
• Wet electrostatic precipitator filtration media
• Electric heating and resistive heating elements
• Hand lay-up, filament winding, resin infusion, and pultrusion processes
2.2 Polyimide (PI) Fiber Wet-Laid Nonwoven
Polyimide fiber nonwovens produced via wet-laid technology deliver exceptional thermal stability and chemical resistance. The uniform fiber dispersion inherent to the wet-lay process ensures consistent material properties and reliable performance in extreme environments.
Parameter | Specification |
Fiber Type | Polyimide (PI) Fiber |
Process | Wet-Laid |
Continuous Operating Temperature | Up to 315°C |
Thermal Stability | Non-melting, retains structural integrity at elevated temperatures |
Flame Retardancy | Self-extinguishing, no melt-drip, LOI 44 |
Chemical Resistance | Excellent resistance to acids, alkalis, and organic solvents |
Dimensional Stability | Superior, minimal shrinkage at high temperatures |
Key Applications
• High-temperature filtration media (hot gas filtration, industrial exhaust)
• Aerospace and automotive thermal insulation components
• Electrical insulation materials for motors and transformers
• Battery separators requiring thermal stability
• Protective apparel linings for fire-resistant clothing
• Sealing and gasket materials for high-temperature service
2.3 Basalt Fiber Wet-Laid Nonwoven (Veil / Tissue)
Basalt fiber wet-laid nonwovens are manufactured from natural basalt chopped strands via a papermaking-like wet-laid process, coated with specialty acrylic binder and thermally dried. The material offers a unique balance of mechanical properties positioned between glass fiber and carbon fiber, with additional advantages in flame retardancy, chemical stability, and environmental sustainability.
Parameter | Specification |
Fiber Type | Natural Basalt Fiber |
Fiber Length | 6 mm (chopped strand) |
Area Weight Range | 6–105 g/m² |
Standard Width | 1000 mm / 1200 mm (custom widths available) |
Binder Type | Acrylic Acid |
Working Temperature | Optimal up to 200°C; fiber deformation temperature 700°C |
Flame Retardancy | Excellent, low thermal conductivity, ultra-low shrinkage |
Chemical Resistance | Superior acid and alkali resistance |
Electrical Properties | Premium electrical insulation performance |
Key Applications
• Printed Circuit Board (PCB) tissue (75/105 gsm grades)
• Vacuum Insulation Panels (VIP)
• Pipeline anti-corrosion and anti-leakage wrapping layers
• Roofing and waterproofing engineering membranes (30/40/50 gsm)
• Battery separator materials
• High-temperature flue gas filtration (baghouse media, 200–400°C service)
• Building flame retardant and thermal insulation structures
• Aerospace and high-end sporting goods composite reinforcement
2.4 PPS (Polyphenylene Sulfide) Fiber Wet-Laid Nonwoven
PPS wet-laid nonwoven fabric is composed of 100% polyphenylene sulfide fiber, a super engineering plastic renowned for its exceptional heat resistance and chemical stability. The material delivers reliable performance in high-temperature environments where conventional polymers fail.
Parameter | Specification |
Fiber Type | 100% PPS (Polyphenylene Sulfide) Fiber |
Process | Wet-Laid |
Melting Point | 280°C |
Maximum Continuous Use Temperature | 200–220°C |
Dry-Heat Areal Shrinkage (180°C) | ≤5% |
Thickness Range | 29–195 μm |
Heat Resistance | Excellent, comparable to PTFE (PFAS) |
Chemical Resistance | Outstanding acid and alkali resistance |
Flame Retardancy | Inherent flame retardant properties |
Key Applications
• High-temperature liquid filtration (chemical processing, electroplating)
• Hot gas and air filtration media
• Industrial filter bag substrates for harsh environments
• Thermal insulation layers for energy and mobility sectors
• Battery separator materials
• Tape substrates and industrial laminates
2.5 Aramid Fiber Wet-Laid Nonwoven
Wet-laid aramid nonwoven is an engineered solution combining exceptional thermal stability and mechanical strength through a specialized wet-lay process, delivering uniform thickness and density across 9 standardized grades.
Parameter | Specification |
Fiber Type | Aramid (Meta-aramid / Para-aramid) |
Nominal Thickness Grades | 0.05–0.76 mm (2–30 mil, 9 grades) |
Basis Weight Range | 41.5–710 g/m² |
Density Range | 0.79–1.0 g/cc |
MD Tensile Strength | 41–650 N/cm (grade-dependent) |
CD Tensile Strength | 17–450 N/cm (grade-dependent) |
Shrinkage at 300°C | ≤3.5% (IEC60819-2:2002) |
Flame Rating | UL94 V-0 |
Key Applications
• Electrical insulation: motor slot liners, transformer insulation, phase insulation
• Aerospace composite reinforcement layers
• Flame-resistant barriers and heat shields
• Battery separators and high-temperature filtration
• Honeycomb core materials for lightweight structures
• Gasket and sealing materials for high-temperature service
2.6 Nickel-Coated Carbon Fiber Wet-Laid Nonwoven
Nickel-coated carbon fiber nonwoven is an advanced EMI shielding material manufactured by wet-laying short-cut carbon fibers, followed by electroless nickel plating. The metal coating dramatically enhances electrical conductivity and electromagnetic interference shielding effectiveness.
Parameter | Specification |
Base Material | PAN-based Carbon Fiber Nonwoven |
Coating | Electroless Nickel Plating |
Fiber Length | 6 mm |
Fiber Diameter | 6–7 μm |
Thickness | Ultra-thin, down to 95 μm achievable |
EMI Shielding Effectiveness | Up to 79.33 dB (Ni-plated, frequency dependent) |
Base Carbon Nonwoven EMI-SE | ~40.97 dB (uncoated) |
Tensile Strength | ~83.98 MPa (MD, resin-impregnated) |
Conductivity | Excellent electrical and surface conductivity |
Key Applications
• Electromagnetic interference (EMI) shielding for electronics enclosures
• Aviation and aerospace avionics shielding
• Telecommunications equipment shielding
• Military and defense EMI/RFI protection
• Lightweight conductive layers for composite structures
• Radar absorbing and stealth material applications
• Electrostatic discharge (ESD) protection materials
2.7 Quartz Fiber Wet-Laid Nonwoven
Quartz fiber nonwovens offer a unique combination of exceptional dielectric performance, ultra-high temperature resistance, and outstanding chemical stability. Made from high-purity quartz fibers, this material is ideal for electromagnetic wave-transparent applications in aerospace and telecommunications.
Parameter | Specification |
Fiber Type | High-Purity Quartz Fiber |
Process | Wet-Laid |
Dielectric Constant (Dk) | 3.74 (at 10 GHz) |
Dielectric Loss (Df) | 0.0002 |
Long-Term Operating Temperature | 1050–1200°C |
Softening Point | 1700°C |
Thermal Expansion Coefficient | 0.54×10⁻⁶ /K |
Tensile Strength | Up to 6000 MPa (fiber level) |
Chemical Resistance | Excellent resistance to acids and alkalis |
Insulation Performance | Resistivity ~1×10¹⁸ Ω·cm at 20–100°C |
Key Applications
• Wave-transparent materials: missile/aircraft/satellite radomes
• Stealth material components (aircraft, missiles, UAVs, naval vessels)
• High-performance circuit boards (high-frequency, high-speed)
• Ablation-resistant thermal protection materials (spacecraft, missile exhaust)
• High-temperature insulation for aerospace applications
• Catalyst carrier substrates (vehicle exhaust treatment, industrial air purification)
• Replacement for high-silica, ceramic, and glass fibers in high-temperature service
2.8 Glass Fiber Wet-Laid Nonwoven (Fiberglass Mat)
Glass fiber wet-laid nonwovens are produced from chopped E-glass fibers via the wet layout process. These materials offer high tensile strength, excellent corrosion resistance, and superior compatibility with bitumen and resin systems.
Parameter | Specification |
Fiber Type | E-Glass Fiber |
Fiber Diameter | 9–11 μm (typical) |
Area Weight Range | 45–90 g/m² |
MD Tensile Strength | ≥170–400 N/50mm (grade-dependent) |
CD Tensile Strength | ≥75–200 N/50mm (grade-dependent) |
LOI (Loss on Ignition) | ≤25% |
Moisture Content | ≤1.0% |
Corrosion Resistance | Excellent |
Testing Standards | ISO3374, ISO1887, ISO3342 |
Key Applications
• Excellent substrate for APP and SBS-modified bitumen waterproofing membranes
• Roofing tissue and building material reinforcement
• Pipe wrapping and anti-corrosion layers
• FRP (Fiberglass Reinforced Plastic) surface tissue
• Wall decoration and gypsum board facing materials
• Filtration media (MERV-rated filter mats)
• Floor covering reinforcement mats
2.9 Hybrid Fiber Wet-Laid Nonwoven
Hybrid fiber wet-laid nonwovens combine multiple fiber types in a single material to achieve tailored performance characteristics unattainable with single-fiber systems. The wet-lay process enables precise control over fiber blend ratios, creating customized solutions for specific engineering requirements.
Parameter | Specification |
Process | Wet-Laid Hybrid Nonwoven |
Fiber Combinations | Carbon + Natural Fibers (Flax, Hemp, Jute, Kenaf, Sisal); Carbon + Polyester; Carbon + Glass; Glass + Polymer Fibers; etc. |
Fiber Content Control | Precise ratio control (e.g., 25%, 50%, 75% fiber blends) |
Isotropic Properties | Uniform in-plane fiber orientation for consistent mechanical performance |
Binder Options | Thermoplastic binders, co-polyester, acrylic, thermosetting resins |
Composite Processing | Compatible with compression molding, heat press consolidation |
Key Applications
• Recycled carbon fiber (rCF) hybrid composites for sustainable manufacturing
• Carbon/natural fiber hybrid composites (flax, hemp, jute, kenaf, sisal blends)
• Glass/polymer hybrid preforms for compression molding
• Cost-optimized reinforcement materials (carbon + polyester blends)
• Thermoplastic composite preforms (wet-laid + heat-molding compression)
• Ceramic matrix composite (CMC) preforms
• Custom functional materials with tailored mechanical, electrical, and thermal properties
Why Partner With Us
Manufacturing Excellence
• Advanced Wet-Laid Production Line: State-of-the-art wet-laying equipment ensures consistent fiber dispersion and uniform sheet formation across all area weights from 4 gsm to 710 gsm.
• Comprehensive Fiber Portfolio: Nine high-performance fiber types available — carbon, polyimide, basalt, PPS, aramid, nickel-coated carbon, quartz, glass, and hybrid blends — with full customization on fiber blends, binder chemistry, and physical dimensions.
• Quality Assurance: Rigorous testing per GB/T12914-2008, GB/T451.2-2002, IEC60819-2:2002, and ISO standards. Each production batch undergoes tensile, thickness, basis weight, and moisture content verification.
• OEM & Custom Manufacturing: Full support for custom area weights, thicknesses, roll widths, binder types, and fiber blend formulations to meet your exact application requirements.
• Competitive MOQ & Lead Times: Flexible minimum order quantities and reliable production scheduling for both sample development and volume production.
Industries Served
• Aerospace & Defense
• Automotive & Transportation
• Electronics & Electrical Insulation
• Filtration (Air, Liquid, Gas)
• Energy (Battery, Fuel Cell, Wind)
• Construction & Building Materials
• Chemical Processing
• Marine & Offshore
• Medical & Healthcare
• Telecommunications
Frequently Asked Questions
Q1: What is wet-laid nonwoven fabric?
Wet-laid nonwoven is a sheet material produced by dispersing short-cut fibers in a liquid medium (typically water), forming a uniform fiber mat on a moving screen, and then bonding and drying the sheet. This process delivers exceptional fiber dispersion uniformity and isotropic mechanical properties compared to dry-laid or spunbond methods.
Q2: What binders are used in wet-laid nonwovens?
Common binders include acrylic acid type, PVA (Polyvinyl alcohol), aqueous epoxy, co-polyester, and thermosetting resins. Binder content typically ranges from 3% to 25% depending on the application requirements for mechanical strength and resin compatibility.
Q3: What is the minimum area weight available?
Carbon fiber veils can be produced as low as 4 gsm in area weight, while other fiber types typically start from 6–20 gsm. Maximum area weights can reach up to 710 gsm for aramid grades.
Q4: Do you offer custom fiber blends?
Yes, hybrid fiber nonwovens with customized blend ratios are available. Common combinations include carbon + polyester, carbon + natural fibers (flax, hemp, jute), and glass + polymer fiber blends.
Q5: What is your MOQ and lead time?
MOQ varies by product specifications and fiber type. Please contact our sales team with your technical requirements for a detailed quotation and production timeline.
Q6: Can you provide technical data sheets and samples?
Yes, detailed technical data sheets with complete mechanical, thermal, and electrical specifications are available upon request. Free samples for evaluation can be provided for qualified inquiries.
Contact & Inquiry
Ready to Discuss Your Project?
Whether you need a standard grade wet-laid nonwoven or a fully customized solution, our engineering team is ready to assist. Please provide the following information for a prompt quotation:
• Required fiber type(s) and blend ratio (if hybrid)
• Target area weight (gsm) or thickness (mm)
• Roll width and length requirements
• Binder preference (if known)
• End-use application details
