GB/T 21461.2-2023 is the second part of the standard for plastic ultra-high molecular weight polyethylene (PE) (PE-UHMW) molding and extrusion materials. It specifies the method of sample preparation in detail, including the production process and requirements of the sample under different processes such as molding and extrusion. At the same time, the determination method of key performance such as tensile strength, Impact strength, thermal performance, etc. is clarified, covering equipment selection, operation steps and data processing. According to this standard, material performance data can be accurately obtained, providing a reliable basis for the application of PE-UHMW in various fields, and assisting product design and quality control.