The essence of sports competition is the competition of science and technology. Advanced and novel materials are one of the important conditions for improving the level of sports science and technology. Carbon fiber is an inorganic polymer fiber material with high carbon content. It is “outside and soft inside”. The quality is lighter than metal aluminum, but the strength is higher than steel. Therefore, carbon fiber composite materials are one of the hot new materials. In a sense, the small increase in the world record of any project often requires and relies on technology. The advantages of carbon fiber composites in sporting goods are:

1. Light weight and small coefficient of thermal expansion
 
Sports equipment such as poles, golf clubs, tennis rackets, bicycles, and snowboards that require manpower to move. It is hoped that the lighter the better, the composite material has a huge advantage in this respect, its density is 1.76-1.80g/cm3, the density of the composite material is 1.50-1.60g/cm3, and the steel is about 7.87g/cm3. Obviously, CFRP is much lighter than metal materials. The coefficient of thermal expansion of carbon fiber is almost zero at room temperature. When the temperature is 200-400 ° C, the coefficient of thermal expansion is zero.
 
2. Good damage and safety performance

In the carbon fiber composite material, due to the action of the body, the strain of the individual fibers is basically the same when the fiber is pulled in the direction of the fiber, and the broken fiber still functions as the result of the basic stress, except that the fracture does not function.

3. Large degree of freedom in design
 
The development of composite molding technology has greatly improved the degree of freedom of design. The remarkable feature of fiber composites is anisotropy. By changing the direction and manner of laying of fibers, local reinforcement or enhancement of stress in a certain direction can be based on the player's The age, gender, skill level and other conditions are designed to maximize the use of sports equipment. This is not possible with other general materials and equipment.