High Modulus High Performance Carbon Fiber Plain fabric CWP200-1000

Fiber

Weight g/m2

Fiber

g/m2

CWP200

3K

100

3K

100

200

0.2

• For the most commonly used polyacrylonitrile (PAN)-based carbon fiber roving, the process begins with the polymerization of acrylonitrile monomers. These monomers are mixed with appropriate comonomers (such as methyl acrylate, itaconic acid) in a reactor under specific temperature, pressure, and catalyst conditions. The resulting PAN polymer solution or melt has a specific molecular weight distribution and viscosity suitable for the subsequent spinning process.

• Wet Spinning: In wet spinning, the PAN polymer solution is extruded through spinnerets into a coagulation bath. The solvent in the solution diffuses into the bath, and the polymer precipitates, forming solid filaments. These filaments then pass through stretching and washing processes to remove impurities and align the molecular chains.

• Dry Spinning: In dry spinning, the PAN polymer is dissolved in a volatile solvent. The solution is extruded through spinnerets into a heated chamber where the solvent evaporates, leaving behind solid filaments. The filaments are then stretched to improve their mechanical properties.

• The spun PAN filaments are fed into an oxidation furnace. In this furnace, the filaments are heated in an air atmosphere at a temperature typically ranging from 200°C to 300°C. During this oxidation process, the PAN molecular chains undergo a series of chemical reactions, such as cyclization, dehydrogenation, and oxidation. These reactions convert the PAN structure into a more thermally stable ladder-like structure, which is essential for preventing the filaments from melting during the subsequent carbonization process.

• The oxidized filaments are then transferred to a carbonization furnace. In an inert atmosphere (usually nitrogen), the filaments are heated to a high temperature between 1000°C and 1500°C. At these high temperatures, non-carbon elements (such as hydrogen, oxygen, and nitrogen) in the filaments are removed in the form of gases, leaving behind carbon-rich fibers. The carbon fibers obtained at this stage have a certain degree of strength and modulus but may still have some defects in their structure.

• For high-modulus carbon fiber roving, a graphitization process may be carried out. The carbon fibers are further heated to an even higher temperature, typically above 2000°C, in an inert atmosphere. At these extremely high temperatures, the carbon atoms in the fibers rearrange themselves into a more ordered graphite-like structure, which significantly improves the modulus and other mechanical properties of the carbon fibers.

• To improve the adhesion between the carbon fibers and the matrix materials (such as resins) in composite applications, the carbon fibers are subjected to a surface treatment. This can be done through methods such as electrochemical oxidation, gas-phase oxidation, or plasma treatment. These treatments introduce functional groups (such as hydroxyl, carboxyl groups) on the surface of the carbon fibers, enhancing their chemical reactivity and compatibility with the matrix.

• After surface treatment, a sizing agent is applied to the carbon fibers. The sizing agent typically consists of a film-forming agent, a coupling agent, and other additives. The film-forming agent forms a thin protective layer on the surface of the carbon fibers, protecting them from damage during handling and processing. The coupling agent helps to improve the bonding between the carbon fibers and the matrix resin. The sizing agent is usually applied by methods such as dipping, spraying, or roller coating.

• The individual carbon fibers are then grouped together to form the roving. Specialized equipment is used to ensure that the fibers are evenly distributed and aligned in the roving. The roving is then wound onto bobbins or spools for storage and transportation. Quality control measures are implemented during this process to ensure that the roving meets the required specifications in terms of fiber count, linear density, and mechanical properties.

High Modulus of Elasticity: It has a high modulus of elasticity, meaning it can resist deformation under stress and return to its original shape once the stress is removed. This property ensures that structures and components made from carbon fiber roving maintain their integrity and dimensional stability even when subjected to repeated or high-stress loads. It is particularly important in applications like wind turbine blades, where consistent performance over time is necessary.

Corrosion Resistance: Carbon fiber roving is highly resistant to corrosion from a wide range of chemicals, including acids, alkalis, and salts. It can maintain its mechanical properties even in harsh environments, such as in marine applications where it is exposed to saltwater or in chemical processing plants. This corrosion resistance eliminates the need for frequent maintenance and replacement due to corrosion-related damage, increasing the lifespan and reliability of components.

Electrical Conductivity: Carbon fiber roving has some level of electrical conductivity. While not as conductive as metals like copper or aluminum, it can still conduct electricity to a certain extent. This property makes it useful in applications where electrical conductivity is required, such as in electromagnetic shielding or in some electronic device components.

Anisotropic Properties: The mechanical properties of carbon fiber roving are highly anisotropic, meaning they vary significantly depending on the direction. The strength and modulus are much higher along the direction of the fibers (axial direction) compared to the transverse direction. This characteristic allows designers to optimize the orientation of the fibers in composite materials to achieve specific performance requirements for different applications.

Good Fatigue Resistance: It has excellent fatigue resistance, being able to withstand repeated stress cycles without significant degradation or failure. This is crucial in applications where components are subjected to dynamic loads over an extended period, such as in automotive suspension systems or in the wings of aircraft that experience constant aerodynamic forces during flight.

In automotive applications, carbon fiber roving plays a vital role in the production of lightweight and high-performance components. It is used to manufacture body panels, engine hoods, drive shafts, and suspension parts. By replacing traditional metal materials with carbon fiber composites made from roving, automakers can achieve substantial weight reduction, which leads to improved acceleration, better handling, and reduced fuel consumption. 

Carbon fiber roving is widely used in the manufacturing of various sports equipment. For bicycles, carbon fiber roving is used to create lightweight and stiff frames, allowing cyclists to achieve higher speeds with less effort. In tennis rackets, it provides excellent power transfer and control, enhancing the player's performance. Golf clubs made from carbon fiber roving offer greater flexibility and accuracy, while fishing rods are more sensitive and durable. The use of carbon fiber roving in sports goods also makes the equipment more comfortable to use due to its reduced weight.

>> Other Applications

include shipbuilding, building materials, electronic products, etc. In these areas, plain carbon fiber cloth can play a role in strengthening, weight reduction, heat insulation and so on.

Prevent carbon fiber Fabric 

From being exposed to sunlight for a long time. Long exposure to sunlight will make the surface of carbon fiber Fabric crack and fade, affecting the beauty and service life.

When storing carbon fiber Fabric

Attention should be paid to avoid humidity, high temperature and other environments. When storing carbon fiber Fabric, avoid humidity, high temperature and other environments, and keep dry and ventilated.