초록 ▼

A monofilament or multifilament sports racket string, of a thermoplastic aromatic polyetherketone and preferably polyetheretherketone, such string preferably having an elongation not exceeding 5% when a tensile stress of at least 100 Newtons/mm2 is applied along the axis of the string and preferably

A monofilament or multifilament sports racket string, of a thermoplastic aromatic polyetherketone and preferably polyetheretherketone, such string preferably having an elongation not exceeding 5% when a tensile stress of at least 100 Newtons/mm2 is applied along the axis of the string and preferably having a dynamic stiffness, measured at a mean stress of 175 Newtons/mm2, of not greater than 1.150 times the dynamic stiffness measured at a mean tensile stress of 80 Newtons/mm2.

대표청구항 ▼

A multifilament sports racket string comprising: a plurality of polyetheretherketone monofilaments, said string having an elongation not exceeding 5% when a tensile stress of 100 Newtons/mm2 is applied along the axis of the string and a dynamic stiffness, measured at a frequency in the range 150 to

A multifilament sports racket string comprising: a plurality of polyetheretherketone monofilaments, said string having an elongation not exceeding 5% when a tensile stress of 100 Newtons/mm2 is applied along the axis of the string and a dynamic stiffness, measured at a frequency in the range 150 to 300 Hz at a mean tensile stress of 175 Newtons/mm2 of not greater than 1.150 times the dynamic stiffness measured at a mean tensile stress of 80 Newtons/mm2. A sports racket strung with a string comprising at least one thermoplastic aromatic polyetheretherketone monofilament, said string having an elongation not exceeding 5% when a tensile stress of 100 Newtons/mm2 is applied along the axis of the string and a dynamic stiffness, measured at a frequency in the range 150 to 300 Hz at a mean tensile stress of 175 Newtons/mm2 of not greater than 1.150 times the dynamic stiffness measured at a mean tensile stress of 80 Newtons/mm2.