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Heavy tow · High build · Cost efficient
12k Carbon Fiber Cloth
12,000 filaments per tow Areal weight: 300 – 800 g/m² Tow width: 5.5 – 6.5 mm
12k Carbon Fiber Cloth utilizes a larger tow count of 12,000 continuous filaments per bundle, delivering a cost-effective reinforcement solution for high-build structural applications. The increased tow size reduces weaving costs and accelerates layup times by covering more surface area per ply compared to 3k or 6k fabrics. The cloth maintains a tensile strength of 3500 – 3800 MPa and a modulus of 225 – 235 GPa, suitable for industrial, marine, and wind energy components. Available in plain, twill, and unidirectional weaves, with areal weights from 300 to 800 g/m². The fabric exhibits lower drape than finer tow counts, making it best suited for flat to moderately curved surfaces.
Technical Specifications
Fiber tow 12k (12,000 filaments)
Fiber diameter 7 – 8 µm
Tensile strength 3500 – 3800 MPa
Tensile modulus 225 – 235 GPa
Elongation at break 1.5% – 1.8%
Areal weight range 300, 400, 600, 800 g/m²
Weave patterns Plain, 2x2 twill, 4HS, unidirectional
Thickness (nominal) 0.40 – 1.05 mm
Sizing Epoxy / vinyl ester compatible
Roll width 1000, 1270, 1600 mm
12k vs. 3k / 6k Comparison
Property 3k 6k 12k
Filament count 3,000 6,000 12,000
Tow width (mm) 3.0 – 3.5 4.0 – 5.0 5.5 – 6.5
Relative cost index 1.00 0.75 0.55
Layup speed index 1.00 1.40 2.00
Drapeability High Moderate Low–Moderate
Surface finish quality Very fine Fine Medium
Cost and speed indices are relative values based on typical manufacturing processes.
Key Advantages
- Reduces material cost per unit area by 30% – 45% compared to 3k fabrics
- Cuts layup time by up to 50% due to faster coverage per ply
- Minimizes ply count for thick laminates, reducing overall processing steps
- Compatible with infusion, hand layup, and compression molding processes
- Available in wide rolls up to 1600 mm for large-part manufacturing
Primary Applications
Wind turbine blades Spar caps, shear webs, root sections
Marine structures Hull reinforcements, bulkheads, deck panels
Industrial equipment Machine bases, rollers, conveyor components
Automotive Chassis reinforcements, underbody shields
Infrastructure Bridge repair wraps, seismic retrofitting
Handling & Processing
Cutting Use ultrasonic or oscillating knife; 12k tows require higher blade force.
Drape Twill and satin weaves offer improved conformability over plain weave.
Infusion Resin viscosity ≤ 300 cP recommended; larger tows promote faster wet-out.
Compaction Apply 0.7 – 1.0 bar vacuum pressure to achieve 55% – 60% fiber volume.
Storage 18 months at 15–28 °C, ≤ 60% RH in moisture-barrier packaging.
+86-13961668677
No. 61, Xingyuan Road, Jiefang Village, Gushan Town, Jiangyin City, Jiangsu Province, China.