GB/T 47391.1-2026 Plastics—Unsaturated-polyester powder moulding compounds(UP-PMCs)—Part 1:Designation system and basis for specifications

Scope

This document establishes a character group system for the naming of plastic-powdered unsaturated polyester molding compounds (UP-PMCs).
UP-PMCs of various models are classified according to a system based on the types and contents of fillers/reinforcing materials, molding processing methods, special properties, and special properties (characteristics) specified for naming purposes.
This document applies to the naming of all general-purpose UP-PMCs in powder, granular, or milled form.
Materials with the same name may not necessarily have the same performance. This document does not provide engineering data, performance data, or processing condition data required for material molding or specific applications. If such additional performance data is needed, it can be measured using the applicable test methods specified in GB/T 47391.2.
The character group system established in this document is also used in cases where it is necessary to explicitly indicate the general performance requirements specified in GB/T 47391.3.

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