GB/T 18942.2 - 2003 Determination of compressive stress-strain characteristics of high-density materials in focused polymer porous resilience materials. This standard defines the scope of applicable high-density materials, details the sample prepative process, and specifies the requirements of instruments and equipment such as Universal Testing Machine. Standardize compression test operations, such as loading rate, displacement measurement and other key links, and clarify the calculation and representation of results. By measuring compressive stress-strain characteristics, material performance can be evaluated. This standard provides a unified method for mass testing of high-density polymer porous resilience materials, helping enterprises control product mass and promote industry development.