What is the difference between short-cut carbon fiber and long-cut carbon fiber? A penny to tell you!

The concept of short-cut carbon fiber and long-cut carbon fiber

short-cut carbon fiber refers to the carbon fiber is cut into pieces between 1 and 4mm in length during the manufacturing process, which is characterized by smooth surface, not easy to bond with resin, but high strength and high modulus, so it is suitable for strengthening composite materials.

Long-cut carbon fiber refers to the carbon fiber grows directly into a long strip between 10-50mm in length, will not be cut short in the manufacturing process, the surface is rough, easy to bond with the resin, but the toughness is good, suitable for the manufacture of high-strength workpieces.

Second, the difference between short-cut carbon fiber and long-cut carbon fiber

1. Strength and modulus

The strength and modulus of short-cut carbon fiber and long-cut carbon fiber are different greatly. The direct tensile strength and modulus of short-cut carbon fiber are usually more than 50% higher than long-cut carbon fiber, which is the main reason why short-cut carbon fiber is suitable for reinforced composite materials. The strength and modulus of long-cut carbon fiber are relatively lower, but the toughness is better.

2. Surface status

The surface of the short-cut carbon fiber is smooth, and it is not easy to bond with the resin, and it is easy to have short fiber cracks, which will affect the strength of the composite material. The surface of long-cut carbon fiber is rough and can be well bonded to the resin Be together.

3. Scope of application

Short-cut carbon fiber is suitable for reinforcing composite materials, which can improve its strength and modulus, but attention should be paid to the problem of short cracks in the fiber. The long-cut carbon fiber is suitable for the manufacture of high-strength workpieces, such as ships, aircraft, vehicles, etc.

third. Summary

There are some differences in strength, modulus and surface state between short-cut carbon fiber and long-cut carbon fiber, which are suitable for different fields. In practical applications, it is necessary to choose according to the nature of the material and the requirements of use.

Yancheng Xiangsheng Carbon Fiber Technology Co., Ltd. Registered trademark "Xiangli", is committed to the research of carbon fiber, aramid fiber and other special fiber composite materials functionality and design diversity, It has developed 16 series products with independent intellectual property rights, such as rotorcraft shell, landing gear, aircraft plant protection spray system, seaplane float, swamp boat, aerodynamic boat, aviation communication helmet, carbon fiber for plastic reinforcement, carbon fiber powder for friction materials, short carbon fiber for braking system, as well as carbon fiber rope, carbon fiber cloth, carbon fiber filament special fiber cutting machine.