GB/T 39692-2020 Low Temperature Testing of Focused Vulcanized Rubber or Thermal Plasticity Rubber. This standard provides a comprehensive overview and guide to introduce the importance and scope of low temperature testing, and to sort out the principles and characteristics of various low temperature test methods, such as low temperature rigidity, low temperature retraction, etc. At the same time, it provides guidance and suggestions for the selection of test equipment, sample preparation and result analysis. It provides systematic guidelines for relevant personnel to carry out low temperature testing of rubber, and helps to accurately evaluate the performance of rubber in low temperature environment and ensure the mass and Reliability of products in cold conditions.