GB/T 24218.102-2022 is Part 102 of the GB/T 24218 series of standards, specifying the method for determining the tensile elasticity of nonwovens, applicable to the performance evaluation of various types of nonwovens. Its core principle involves deforming the specimen under specific conditions through either a constant elongation rate or a constant force tensile mode. After a specified recovery period, dimensional changes are measured, and the elastic recovery rate, permanent deformation rate, and stress relaxation rate are calculated. The test requires the use of a constant rate of extension (CRE) testing instrument (or an electronic universal testing machine) equipped with specialized pneumatic clamping fixtures and other equipment to precisely control the tensile rate and load. This provides a unified and reliable technical basis for the research and development, production quality control, and application selection of nonwovens.