| 摘要 |
<p>1. String system for sports rackets comprising stretched plastic strings, including profiled polyurethane strings or a network of such strings, characterized in that the strings comprise a thermoplastic PUR elastomer, with a tensile strength of 30 to 60 MPa and a breaking strain of 550 to 660%, based on the starting state, and that the stretching takes place accompanied by the absorption of part of the breaking strain.</p> |
