GB/T 2546.1-2022 Translated English of Chinese Standard (GB/T 2546.1-2022, GBT2546.1-2022): Plastics - Polypropylene (PP) moulding and extrusion materials - Part 1: Designation system and basis for specifications

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This document specifies the designation system of polypropylene (PP) thermoplastic materials, and this system can be used as the basis for specifications. Different types of polypropylene thermoplastic materials are distinguished by a classification system based on the following specified characteristic property values and recommended purposes and (or) processing methods, important properties, additives, colorants, fillers and reinforcing materials, etc.: a) tensile elastic modulus; b) Charpy notched impact strength; c) melt mass-flow rate (MFR). This document is applicable to all propylene homopolymers and other propylene copolymers with a mass fraction of 1-olefin monomers less than 50% and blends of the above-mentioned polymers with a mass fraction of not less than 50%. This document is applicable to materials that are conventionally in the form of powders, granules or crumbs, unmodified or modified by colorants, additives and fillers, etc. This document does not apply to propylene-based rubber. This document does not imply that materials with the same designation will necessarily have identical properties. This document does not provide the engineering data, property data or processing condition data necessary to describe a particular purpose and (or) processing method for the materials. If necessary, these additional properties can be determined in accordance with the test methods specified in GB/T 2546.2. In order to illustrate a particular purpose of a certain polypropylene thermoplastic material or to ensure the reproducibility of processing, additional requirements may be provided in data block 5. GB/T 2546.1-2022 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 8 of 19
 

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