Overview
EN ISO 15252-3:1999 (ISO 15252-3:1999) defines the requirements for selected epoxy powder moulding compounds (EP‑PMCs) and for compression- or injection‑moulded test specimens made from them. This part of ISO 15252 is limited to powder moulding compounds whose composition and properties are significantly different and which are of general technical and/or economic importance. The standard sets required property values, divides compounds into types by composition (using the designation system in ISO 15252‑1), and selects test methods and conditions from ISO 15252‑2.
Key topics and technical requirements
- Scope of materials covered: Selected EP‑PMCs grouped by filler/reinforcement type and content (designations in the standard include combinations such as MD, GF+MD and GF+GG).
- Property categories specified:
- Mechanical: stress at break, flexural strength, Charpy impact (unnotched and notched)
- Thermal: temperature of deflection under load (HDT) for specified loads (T1.8 and T8.0), flammability (glow‑bar test categories)
- Electrical: dissipation factor (tan δ), volume and surface resistivity, proof tracking index (PTI)
- Other: water absorption, plus optional reporting of cure time, particle size and moisture content when agreed between parties
- Test specimens and methods: Preparation and test methods are drawn from ISO 15252‑2; property mean/value limits and allowed individual variation are defined in tables (Tables 1–3).
- Moulding processes: Requirements are given for both compression moulding and injection moulding; limits may differ between processes and should be interpreted accordingly.
- Designation and classification: Compound types use the designation system of ISO 15252‑1; Annex A provides a comparison of designations.
Practical applications and users
Who uses EN ISO 15252-3:
- Polymer and EP‑PMC manufacturers validating product performance and preparing specifications
- Materials engineers and OEMs (electronics, electrical insulation parts, automotive components) selecting moulding compounds to meet mechanical, thermal and electrical requirements
- Test laboratories and quality assurance teams defining test programs and acceptance criteria for compression or injection‑moulded parts
- Procurement and compliance teams specifying standardized property limits in supply contracts
Why it matters:
- Ensures consistent characterization of epoxy powder moulding compounds
- Facilitates comparability across suppliers and repeatable qualification of materials for critical thermal, mechanical and electrical applications
- Supports clear communication of filler types and performance classes via standardized designations
Related standards
- ISO 15252‑1: Designation system and basis for specifications (used to name compound types)
- ISO 15252‑2: Preparation of test specimens and determination of properties (defines test methods and conditions)
Keywords: EN ISO 15252-3:1999, epoxy powder moulding compounds, EP‑PMCs, property requirements, compression moulding, injection moulding, mechanical properties, thermal properties, electrical properties, ISO 15252-1, ISO 15252-2.
