Abstract: This core (2) for a racket string, in particular for a tennis racket string, includes a thermoplastic matrix (24) in which filaments (22) are embedded, at least one of these filaments being of natural origin and the thermoplastic matrix (24) being made of a material which, at a temperature lower than a threshold temperature, at which the filaments (22) are not substantially damaged, has a viscosity making it suitable for an extrusion process. The matrix (24) includes a plurality of strands that are helically twisted in a first direction, each of the strands including a plurality of filaments (22) of natural origin that are helically twisted in a second direction, which is or is not opposite to the first direction.

Abstract: This core (2) for a racket string, in particular for a tennis racket string, includes a thermoplastic matrix (24) in which filaments (22) are embedded, at least one of these filaments being of natural origin and the thermoplastic matrix (24) being made of a material which, at a temperature lower than a threshold temperature, at which the filaments (22) are not substantially damaged, has a viscosity making it suitable for an extrusion process. The matrix (24) includes a plurality of strands that are helically twisted in a first direction, each of the strands including a plurality of filaments (22) of natural origin that are helically twisted in a second direction, which is or is not opposite to the first direction.

Abstract: The invention relates to a string for a racket, particularly for a tennis racket, which includes: a central core (2) and a peripheral protective layer (6). Additionally, the string includes an intermediate reinforcing layer (4) made of a composite material and placed between the central core (2) and the peripheral protective layer (6), the hardness of the reinforcing layer (4; 14; 24; 34) being greater than the hardness of the protective layer (6; 16; 26; 36), the reinforcing layer providing a function of increasing the resistance to wear and tear, while the protective layer provides a function of increasing sliding.