1. Single-core single-layer fiber structure
It is the most popular nylon string section structure – most “gut-like strings” are single-core, single-layer fiber structures. The biggest advantage of this kind of string is that the poundage is not easy to decay, and the “crisp” feel of hitting the ball is close to the natural gut string. The texture and thickness of the inner core and outer fibers of nylon will affect the hitting feel and comfort of the string.
2. Single-core multi-layer fiber structure
Similar performance to single-core single-layer fiber strings, but with better durability and ball-eating.
3. Multi-fiber structure
This string is a bundle of extremely fine synthetic fibers twisted together to form a string, similar in structure to a natural gut string. The multi-strand structure of this nylon is superior to the structure with an inner core in the comfort of impact shock, and the ball feels like a natural gut string. At the same time, because the string is soft and comfortable to hit the ball, it is more suitable for players who have tennis elbow but cannot afford natural gut strings. But this kind of string, like natural gut strings, can damage it from hitting the ball and may also cause the string to split*, so its service life is between natural gut strings and core composite strings.
4. Multi-fiber single-core multi-layer structure
A large core is composed of a plurality of finer multi-fiber inner cores, and is wrapped by one or more layers of fibers on the outside. This gives similar comfort to multifiber strings, but is more durable.
5. Rough structure
The string has one or more filaments wrapped around the outside of the entire string body, or embedded in the outer layer of the string, which increases the roughness of the string and therefore increases the impact of the string. Friction against the ball, so it’s easier to hit a spinning ball.
6. Synthetic material structure
The strings of different materials are combined together, and the advantages of different materials are brought into play as much as possible through the combination of the inner and outer strings of different materials. Many beat strings now use this synthetic material construction
