How to choose a tennis racket; How to choose a tennis racket? How do beginners choose tennis rackets? What's the difference between a carbon fiber tennis racket and a carbon material tennis racket? Problems that should be paid attention to when buying tennis rackets. Where can I buy a full carbon fiber racket? Tennis is the best indoor and outdoor sport. Legs, hips, waist, shoulders and arms move in harmony. It is the best exercise to keep fit and shape a perfect figure. It is not easy to get hurt or be hurt by others in sports. Compared with badminton, tennis has a large amount of coordinated exercise, which is suitable for both men and women. I suggest you choose the best material for buying tennis rackets, such as carbon rackets, carbon aluminum rackets or carbon fiber rackets. The material of the racket is not good, and your wrist will be injured when you play. Do you have this experience? When you hold a steel pipe tightly and hit a big stone hard, you will feel pain and numbness in your whole hand. If you hit it with another stick, you will feel much better. This is the damping performance of the material. Many tennis friends have bought tennis rackets with poor shock absorption, and their wrists will gradually hurt. After a long time, the wrist will bulge, and it will hurt if you push hard. Besides, this bag is not easy to cure. The material of tennis racket determines the performance and hitting feel of tennis racket, not a certain brand, but also many products on the market. 1, carbon fiber tennis racket has light weight, good mechanical properties, good impact resistance, good hitting feel, good shock absorption, and small vibration does not hurt the wrist. 2. Carbon fiber is a fibrous carbon material, which uses some organic fibers (such as nylon, acrylic, rayon, etc.). ) is used as raw material, and organic fiber is carbonized in rare gas at high temperature and pressure of 2000-3000 degrees. Generally used in aviation, military and so on. 3. Carbon materials are usually materials containing carbon elements in powder form, such as graphite. Carbon fiber materials are long and fibrous; British carbon fiber. Although it's just a little short, it's a completely different material. A, wooden tennis racket disadvantages: poor mechanical properties; Slow response to hitting the ball. Advantages: the shock absorption performance is better than that of a metal racket. B, aluminum alloy tennis racket disadvantages: low grade; Poor shock absorption, wrist injury easily. Advantages: simple production process, suitable for industrial production; Low production cost and low price. C, carbon aluminum tennis racket disadvantages: poor performance; Poor damping; Low grade. Advantages: the price is relatively cheap 200-300 yuan RMB d, and the tennis racket made of glass fiber has disadvantages: the mechanical performance is not high; Low strength; The damping performance is average. Advantages: the shock absorption performance is better than that of a metal racket. The price is moderate, 400- 1200 yuan. E. carbon tennis racket disadvantages: low mechanical properties and low strength; The materials used are very miscellaneous. Advantages: the shock absorption performance is better than that of a metal racket. Both low-end and mid-range are available. The price is 400- 1200 RMB. Tennis racket material carbon/glass fiber (carbon material/glass fiber), the performance is average; Medium grade; The price is generally 700- 1300 RMB g, carbon fiber tennis racket, disadvantages: expensive; The molding process is complex, manual layering and low productivity; The rate of defective products is very high. Advantages: quick response to hitting the ball and excellent mechanical properties; The shock absorption performance is the best and the hitting feel is the best. The price is generally 1700-3000 RMB. Carbon fiber is a kind of high strength fiber, as soft as rope. It should be combined with the resin matrix and cured. The proportion of resin is generally between 38% and 57%. The higher the resin content, the worse the performance of the tennis racket and the cheaper the price. There are tennis rackets with resin content below 34%, which are special rackets for professional competitions and are very expensive. Commonly used resins are: polyester, epoxy resin, thermoplastic resin, etc. Among them, epoxy resin-based carbon fiber tennis racket has the best performance, several times higher than other resins, and the racket has the highest price. The racket for professional competition adopts epoxy resin-based carbon fiber prepreg, with epoxy resin content of 34% and carbon fiber content of 66%. I don't have a tennis racket made of 100% carbon fiber because it can't be molded at all. This is a lie of the merchants. In foreign countries, they dare not label materials like this. 5. Carbon fiber prepreg 125g/m2, excluding tax 137.3 yuan /m2, multiplied by tax 17%, the blank weight of a racket is 330-350g；; In addition, the corner loss is reduced by about 430 grams. Plus labor, grinding, painting (85- 1 10 yuan/piece), auxiliary materials (70- 120 yuan/piece), packaging (85- 160 yuan/piece), defective rate and production equipment. Plus the profits of sellers and retailers, plus 5% business tax, plus 20% income tax and so on. The cost of materials is only a fraction of the selling price. Take our commonly used nail clippers as an example. Its material cost is less than 0.23 yuan. The retail price of 3 yuan nail clippers is relatively poor. The average retail price of nail clippers commonly used in our family is around 8- 10 yuan. However, the production process and technology of nail clippers are much simpler than those of carbon fiber tennis rackets. Let's look at the gap between the material cost and the sales price of daily necessities, cosmetics and large and medium-sized consumer goods. If 300-500 yuan can buy a 100% carbon fiber tennis racket, then a 50,000-yuan BMW will be easy.