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See Chinese contents: GB/T 2546.1-2006 GB/T 2546.1-2006: Plastics -- Polypropylene (PP) moulding and extrusion materials -- Part 1: Designation system and basis for specifications
This Part of GB/T 2546 establishes a system of designation for polypropylene (PP) thermoplastic material, which may be used as the basis for specifications. The types of polypropylene thermoplastic materials are differentiated from each other by a classification system based on appropriate levels of the designatory properties, and on information about the intended application and/or method of processing, important properties, additives, colorants, fillers and reinforcing materials.
