GB/T 1681 - 2009 is used to determine the resilience of vulcanized rubber. It regulates the preparation of the sample, and requires the vulcanized rubber sample to meet the specific size and mass standards. Detail the test equipment, such as the pendulum type resilience tester, and specify its calibrate and installation. During the operation process, specify the pendulum release height, Impact angle and rebound Measurement mode. According to this standard test, the rebound ability of vulcanized rubber after being impacted can be accurately quantified. This is of great significance to Rubber research and development and quality control. It helps enterprises to optimize the formula, improve product performance, and meet the requirements of different application scenarios such as tires and shock pads for rubber resilience