In carbon fiber composite materials, 3K carbon fiber twill is a common textile structure. Among them, “3K” means that there are 3000 carbon fiber filaments in each yarn bundle, and “twill” means that the yarns cross the fabric at a certain angle.
“4×4” and “2×2” indicate how the twill is woven and the density of the yarn bundles. The specific meaning is as follows:
1. 4×4 Twill:This means that in every inch (or centimeter) of fabric, 4 strands of yarn pass over 4 strands of yarn, creating an interlaced weaving structure. This weaving method can provide higher fiber density and stronger mechanical properties, suitable for applications requiring high strength and rigidity.
2.2×2 Twill:This means that in every inch (or centimeter) of fabric, 2 strands of yarn pass over 2 strands of yarn, creating an interlaced weaving structure. Compared to 4×4 twill, 2×2 twill has a lower fiber density and larger gaps between fiber bundles, resulting in a material with relatively lower strength and stiffness. But at the same time, 2×2 twill has better flexibility and impact resistance for applications that require vibration resistance and energy absorption.
In summary, 4×4 twill has high strength and rigidity and is suitable for applications requiring high performance, while 2×2 twill has good flexibility and impact resistance and is suitable for applications requiring energy absorption and vibration resistance. Choosing the right weave structure depends on the specific application requirements.
