GB/T 2546.1-2022: Plastics - Polypropylene (PP) moulding and extrusion materials - Part 1: Designation system and basis for specifications

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Scope

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.

Basic Data

Standard ID	GB/T 2546.1-2022 (GB/T2546.1-2022)
Description (Translated English)	Plastics - Polypropylene (PP) moulding and extrusion materials - Part 1: Designation system and basis for specifications
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Word Count Estimation	14,159
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration