| 摘要 |
<p>PURPOSE: To provide tennis racket gut made from a synthetic resin which has good resiliency and hitting feeling similar to natural gut. CONSTITUTION: In gut 1 for tennis racket made from a synthetic resin 2, spring constant is 25 to 90kg at the total load range of 20 to 30kg of a stress-strain curve and a variation of spring constant against load is 0 to -4kg/cm/kg in the tensile test using a sample of 40mm in length.</p> |
