SHANGHAI LIJIN IMP.&EXP. CO.,LTD
SHANGHAI LIJIN COMPOSITE INTERNATIONAL WOULD BE EASIER CHOOSING CARBON FIBER
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High Strength Carbon Fiber Tube 25mm OD Round 3K Twill-Weave for UAV
Carbon fiber tubes, also known as carbon fiber pipes, carbon tubes, or carbon fiber tubes, are made by pre-impregnating carbon fiber composite materials into a polyphenylene vinylene resin and then heat-curing and extruding (twisting). During the manufacturing process, various profiles can be produced using different molds, such as carbon fiber round tubes, square tubes, sheets of different specifications, and other profiles. The production process can also include surface decoration with 3K wrapping.
The 3K Carbon Fiber Round Tube is a high-performance, lightweight tube made from premium 3K carbon fiber fabric, offering exceptional strength and stiffness. Its 3K twill or plain weave provides a sleek, professional appearance, making it ideal for both functional and aesthetic applications. With excellent resistance to corrosion, fatigue, and impact, it’s widely used in drones, RC models, robotics, sports equipment, and industrial machinery. Available in various diameters, wall thicknesses, and finishes (glossy, matte, or sanded), this tube is perfect for projects requiring high strength-to-weight performance. It combines durability, style, and advanced composite technology in one versatile solution.
Features
Lightweight, high strength, corrosion resistance. Good dimensional stability, flame retardant, aesthetically pleasing, easy maintenance, UV resistant, not prone to aging, and other advantages.
Applications
They are used for stunt kites, 468 multi-axes, mechanical equipment, drones, plant protection machines, flying models, various tool rods/sports, and leisure products.
Composition
Roll wrapped tubing is manufactured using multiple layers of prepreg carbon fiber (and if noted, other) materials. In general, each layer is about 0.006 inches thick which means that a tube with a wall thickness of 0.060 inches will typically be composed of 9-10 individual layers of carbon fiber. The number of layers (plys) allows us to vary the orientation of the fibers throughout the thickness, creating a high performance, engineered product.
| Material | Carbon Fiber Round Tube |
| Shape | Round/Oval |
| Technology | Roll-wrapped or pultrusion |
| Dimension | The existing inner diameter of the mold is 4mm-50mm with a length of 1m. |
| Customizable size: The maximum diameter can be 200mm, the longest can be 3m. | |
| Surface | Black glossy/matte surface/painted |
| Glossy 3k weave/matte 3k weave | |
| Color metal wire weave | |
| Feature | lightweight, high strength |
| Working Temperature | Usually, -30-120 degrees, if special requirement, please let us know. |
| Place Of Origin | China |
| Function | Marine, Agriculture Tools, Arrow Shaft, Medical, Sport Products |
| Tolerance | Diameter Tolerance: +/-0.1mm |
| Length Tolerance | +/-1mm |
What are Carbon Fiber Tubes?
Definition and Basic Characteristics
Carbon fiber tubes (also known as carbon fiber rods if they are stiffer and heavier) are predominantly cylindrical structures made from carbon fibers implanted in a polymer matrix, oftentimes an epoxy resin. They are however also available in other shapes such as rectangular or hexagonal, to suit different structural and design requirements. The CFRP tubes distinguish themselves in the market due to the high strength-to-weight ratio; they have more strength and are much lighter compared to their basic counterparts - like steel and aluminum. The carbon fibers provide high tensile strength, usually on the order of 3.5 GPa (Gigapascals), while the polymer matrix binds them together and provides some rigidity to the fibers for strengthening. Carbon fiber tubes also have a density of about 1.6 g/cm³ compared to steel at 7.8 g/cm³ and aluminum at 2.7 g/cm³.
Comparison with Other Materials
Carbon fiber tubes differ considerably compared to other materials. For instance, compared to steel and aluminum, carbon fiber tubes weigh approximately 70% and 40% less respectively, while having equivalent or better strength—application-related increased efficiency and performance, as seen in industries such as aerospace and automotive. In addition to this, carbon fiber tubes don't corrode like steel rusts over time or aluminum corrodes when the conditions dictate so. The modulus of elasticity for carbon fiber is about 230 GPa as compared to 200 GPa in steel and 69 GPa in aluminum, thus it shows that the CFRP tubes are stiffer and have less tendency to deform.
As for their thermal properties, Carbon fiber tubes again outperform traditional materials in terms of their thermal properties. Carbon fiber has a lower coefficient of thermal expansion (CTE) compared to steel and aluminum; that is, it expands and contracts less when subjected to variations in temperature. This dimension stability is highly demanded in applications where precision is a central requirement, as in aerospace and sporting equipment of high performance. Besides, carbon fiber's thermal conductivity is lower than metals, which makes it an excellent choice for applications requiring thermal insulation.
Besides that, any carbon fiber tube has greater fatigue resistance compared with its metal equivalents. Metallic materials, especially steel, and aluminum, upon experiencing cycles of load application and removal, tend to form micro-cracks, which will eventually lead to failure. Carbon fiber will maintain its integrity for a longer period under cyclic loading, a benefit particularly in aircraft structure applications and automotive parts where long-term durability is essential.
