According to the materials used, the bottom plate can be divided into pure wood plate and carbon plate. Let's introduce them respectively. There is a great difference between a pure wood racket and a carbon soleplate, which is not only the difference in elasticity, but also the difference in feel.
The scientific name of carbon fiber is "polypropylene acrylic carbon fiber", which is a composite material made of carbon fiber and related matrix resin (such as epoxy resin). Its physical and mechanical properties are comparable to those of metals, but its specific gravity is much lighter than that of metals. The bottom plate made of carbon fiber is light in weight, strong in rebound, low in arc striking, fast in speed and slightly poor in rotation. The structure of carbon floor is usually 5-wood and 2-carbon, that is, 5-layer pure wood and 2-layer carbon structure. Carbon plate is suitable for quick attack with arc coil.
Carbon fiber board types are divided into:
When it comes to carbon plates, people will naturally think of Primorac carbon. Indeed, it is still a heavy instrument in table tennis equipment, and its classic "alder face material carbon paulownia core" structure is undoubtedly the best script for butterflies to promote violent aesthetics. Paulownia wood is soft, and as a core material, its strength is not as abundant as that of Ayous, but it is relatively stable; Alnus cremastogyne, as a flour material, has good elasticity and "eats the ball", but the ball sense is transmitted smoothly; After they are sandwiched with strong carbon fiber braided fibers, they not only make use of the rigidity of composite fiber materials, but also have the necessary handling performance, so they are serious fans of fast glue. SARDIUS, GERGELY, GERGELY2 1 with the same structure are also very popular, and W.Schlager, which was quickly launched after Shi Lage won the championship, pushed this design to the peak.
This kind of lightweight carbon ball board not only wants to use the high speed of carbon fiber, but also doesn't want to sacrifice the feel of pure wood ball board, or minimize the role of carbon and become a "carbon board unlike carbon board". To achieve this goal, the most direct way is to use thin carbon fiber (about 0. 1mm thick) like most European brands. Because the thin carbon layer doesn't support the board very strongly, it usually adopts the structure of 5W 2C, and in order to avoid the negative influence of carbon on the handle as much as possible, the carbon fiber is "deeply buried" under the stressed material. The end result is: although the feel is not as natural as pure wood, it is still sharp; The peeling speed is faster than that of pure wood board, but the sense of strength is not as good as that of "heavy carbon" board; The arc is flat, but rotation is acceptable. The pure wooden boards in the table tennis court are divided into five splints and seven splints. Five splints are called five clips for short. As the name implies, it is made of five layers of pure wood. Thin and elastic, so it feels transparent and sensitive, easy to deform and store energy, good bottom strength and strong rotation. Most of them are curved plates or suitable for beginners. Seven splints, referred to as seven clips, have good elasticity and fast ball speed, mostly fast arc plates. Pure wood five-clip bottom plate structure: the outermost layers on both sides of the face material directly affect the peeling speed and the transmission of spherical feeling. The middle layer of the core material, usually thick, is also called "big core", which is the main determinant of the strength of the bottom of the ball board. The core material is relatively thick, the bottom strength is better and the strength is more vigorous, but the sense of control over the hitting direction will be reduced. The second outer layer of the material sandwiched between the surface material and the core material is usually horizontal to help increase the resilience. With the relative thickening of the material, the speed of the ball board will be accelerated accordingly, but the feel will be affected.