GB/T 47391.2-2026: Plastics - Unsaturated-polyester powder moulding compounds (UP-PMCs) - Part 2: Preparation of test specimens and determination of properties

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Scope

This document describes the methods for preparation of test specimens and the test
methods for properties of unsaturated-polyester powdered moulding compounds (UP-
PMCs), and specifies the requirements for handling test materials, as well as the
requirements for conditioning the test materials before moulding and the test specimens
before testing.
This document applies to the preparation of test specimens and tests of properties of
unsaturated-polyester powdered moulding compounds (UP-PMCs), provides the
procedures and conditions for the preparation of test specimens and the methods for
using these test specimens for testing properties, and lists the applicable and necessary
properties for characterizing PMCs and their test methods.
The properties are selected from the general test methods in GB/T 19467.1.Other
widely used test methods or those particularly relevant to PMCs are also included in
this document, such as the characteristic properties in GB/T 47391.1.
To obtain reproducible and comparable test results, it is crucial to adopt the test
specimen preparation methods, conditioning methods, test specimen dimensions, and
test procedures specified in this document. Test results obtained using different test
specimen dimensions or different preparation methods may not be consistent.

Basic Data

Standard ID	GB/T 47391.2-2026 (GB/T47391.2-2026)
Description (Translated English)	Plastics - Unsaturated-polyester powder moulding compounds (UP-PMCs) - Part 2: Preparation of test specimens and determination of properties
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Classification of International Standard	83.080.01
Word Count Estimation	10,163
Date of Issue	2026-03-31
Date of Implementation	2026-10-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration