GB/T 21060-2007 is for the determination of flowability of plastics. This standard describes the principle of measurement and quantifies the flowability of plastics by simulating the flow conditions of plastics under specific conditions. Specifies the technical parameters of the required instruments, such as specific specifications funnel and other equipment. Detailed description of the preparation process of plastic samples, covering the selection of samples, pretreatment and other operations. The steps of flowability testing under standard temperature, pressure and other conditions, including material loading funnel, measurement of outflow time and other key operations, as well as final data processing and result determination methods, provide a unified specification for the determination of plastic flowability, and help Plastic Products Research & Development and quality control.