Types of Carbon Fiber Composite Fabric Weave

Carbon fiber composites are woven in various ways. Understanding them will help you optimize your product design, further improve product performance, reduce weight, reduce cost, and ultimately improve your product’s competitiveness.

1. What is Fabric Weave?

Carbon fibers are strands of fiber bundles before they are compiled into fabrics. To expand its applications, carbon fiber is often formed into woven fabrics. The warp and weft fiber bundles are interwoven at specific angles to form a flat, flexible structure. It’s called fabric weave.

2. Weave types

Plain Weave, also called checkerboard

• Structure: Warp and weft fiber bundles are alternately woven up and down to form a uniform 1×1 square lattice mechanism.
• Advantages: lighter and thinner, better balanced anisotropy, so that its mechanical properties are balanced in all directions, suitable for multi-directional forces of the thin wall of the scene.
• Disadvantages: It has poor flexibility and draping, is not suitable for curved-shaped draping scenarios, but only for flat structures.

Twill Weave

• Structure: The warp yarns are interlaced across multiple weft yarns to form a diagonal pattern, commonly 2×2 twill, 4×4 twill, or 2×2 double twill.
• Advantages: Less interlacing of warp and weft yarns, denser structure, higher flexibility. It is more suitable for a composite surface structure. The three-dimensional structure formed is more beautiful and more suitable for exposed scenes.
• Disadvantages: As the fewer interwoven points, they are less abrasion-resistant and the edges are more prone to loosening.

Twill weaving can be classified into the following types based on the different interweaving methods of its warp and weft

2×2 Twill Weave：

This is the most common type of 2×2 weave fabric. It consists of 2 warp yarns draped over 2 weft yarns, which are buried underneath the two weft yarns to form an interlaced weave.

4×4 Twill Weave：

The same weave as 2×2 twill, except that it consists of 4 warp yarns floating on top of 4 weft yarns, which in turn are buried under the 4 weft yarns. The structure is looser than 2×2 twill, with better drape and easier molding

2×2 Dual Twill: It is generally applied to mixed fabrics

• Structure: The warp yarn hangs horizontally up over 2 weft yarns and then down over 2 weft yarns to form a continuous diagonal structure. And the weft yarns are interwoven with the warp yarns in the same way, 2 up and 2 down, forming a symmetrical twill structure.
• Advantages: Due to its diagonal structure, it has superior shear resistance and strong surface fit, making it suitable for complex stress scenarios.

Satin Weave

• Structure: Interlacing of warp and weft yarns occurs once at intervals of multiple yarns, and these interweaving points are separate, regular, and discontinuous.
• Advantages: Flat and smooth surface, superior flexibility, suitable for structures with complex curved surfaces. Lightweight: uniform epoxy resin infiltration, adequate fiber content.
• Disadvantages: More prominent anisotropy, lower transverse strength of the tissue.

Unidirectional Weave

• Structure: All yarn fibers are arranged parallel along the same direction without any interweaving.
• Advantages: superior strength along the fiber direction. Better lightweight 
• Disadvantages: lower transverse strength of the tissue, needs to be improved by multiple layers of cross-layering

3. Parameter Comparison of Different Weaving Methods

4. Application

• Aerospace

UAV propellers: Unidirectional fabric is chosen to be layered along the length of the propeller blade to maximize its flexural strength, greatly reducing the fuselage weight and increasing its range.

• Automobile

Car Body: Carbon fiber composite twill fabrics combine curved molding capabilities with aesthetic appeal, while improving torsional stiffness and shear resistance.

• Medical Facility 

CT bed panels for testing equipment: The satin weave’s high flexibility allows it to conform to the body’s curves and ensures a high X-ray transmission rate.

5. Conclusion

Understanding and learning how carbon fiber composites are woven can help you accurately match the materials with your product properties, optimize your product’s production process, reduce your product’s cost, and give your product a place in the market.