GB/T 39821-2021
ActivePlastics—Determination of apparent density of moulding material that cannot be poured from a specified funnel
塑料 不能从规定漏斗流出的模塑材料表观密度的测定
Application Summary AI generated
This standard specifies a method for determining the apparent density of plastic moulding materials that are too cohesive, fibrous, or irregularly shaped to flow freely through a specified funnel. It is applied in quality control and material specification testing within the plastics manufacturing industry, particularly for powders, flakes, or granules used in compression or injection moulding processes. The test ensures consistent material packing behavior during processing, aiding in formulation development and production consistency.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.