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3k Carbon Fiber Cloth
3k Carbon Fiber Cloth is a woven fabric composed of 3,000 continuous carbon filaments per tow. This tow count establishes a balanced grid structure, providing a controlled balance of tensile strength and drapeability. The cloth is manufactured from polyacrylonitrile (PAN) precursor, undergoing oxidation and carbonization processes to achieve a high modulus of elasticity. Its plain or twill weave architecture enables consistent resin uptake during lamination, facilitating predictable mechanical performance in composite layups. Surface treatments, including electrochemical oxidation and sizing application, are applied to optimize interfacial bonding with epoxy, polyester, and vinyl ester matrices.
Core Advantages
- Tow consistency 3,000 filament count per tow delivers uniform fiber distribution across the weave, reducing stress concentration points in cured laminates.
- Weave stability The balanced plain or twill weave structure maintains dimensional stability during handling and impregnation, minimizing fiber distortion.
- Resin compatibility Sizing formulations are selected to match common thermoset resin systems, promoting wet-out and reducing void content in final parts.
- Thickness precision Nominal thickness of 0.25–0.30 mm (for plain weave) allows predictable ply stacking and volume fraction calculations.
Application Scenarios
- Aerospace interiors Secondary structural panels, ducting, and fairings requiring lightweight, fire-retardant grades.
- Automotive components Drive shafts, suspension arms, and body panels for weight reduction without sacrificing stiffness.
- Marine structures Hull reinforcement, masts, and deck fittings exposed to saltwater and UV environments.
- Sports equipment Bicycle frames, hockey sticks, fishing rods, and tennis racket layups for controlled flex characteristics.
- Industrial tooling Mandrels, jigs, and fixture components where thermal stability and low CTE are required.
Product Properties
| Fiber type | PAN-based carbon fiber, standard modulus (230–240 GPa) |
| Tow size | 3k (3,000 filaments per tow) |
| Weave pattern | Plain weave or 2x2 twill (specify per order) |
| Areal weight | 200 g/m² (± 5%) for plain; 220 g/m² (± 5%) for twill |
| Thickness | 0.25 mm (plain) / 0.30 mm (twill), nominal |
| Tensile strength (dry fabric) | ≥ 3500 MPa (fiber level) |
| Elongation at break | 1.5% – 1.8% |
| Sizing type | Epoxy-compatible (1.0 – 1.5% by weight) |
| Roll width | 1000 mm or 1270 mm (custom widths available) |
| Roll length | 50 m, 100 m, or 200 m |
Common Questions and Handling Notes
Storage and shelf life
Store in original packaging in a dry environment (15–25 °C, ≤ 60% RH). Avoid direct sunlight and moisture. Sizing remains effective for 12 months under recommended conditions.
Cutting and handling
Use sharp ceramic or tungsten carbide blades to minimize fraying. Sealing cut edges with a heat knife or tape reduces loose filaments during layup.
Resin selection
Epoxy systems with viscosity below 800 cP at 25 °C are recommended for complete wet-out. For polyester or vinyl ester, verify sizing compatibility through a wet-out test prior to production.
Layup compaction
Apply vacuum bagging with a minimum pressure of 0.8 bar to achieve uniform fiber volume fraction (55–60%) and reduce inter-ply air entrapment.
Color variation
Minor shade differences between batches are inherent to carbonization process conditions and do not affect mechanical properties.
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