Overview
ISO 15252-3:1999 specifies requirements for 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 EP-PMC types whose composition and properties differ significantly and which have general technical or economic importance. Property limits, test methods and specimen preparation are selected from ISO 15252-2, and EP-PMC types are identified using the designation system in ISO 15252-1.
Key topics and technical requirements
- Scope and designation
- Applies to selected EP-PMC types; filler/reinforcement nature and content must match the designation defined in ISO 15252-1.
- Measured property groups
- Mechanical: stress at break, flexural strength, Charpy impact and Charpy notched impact.
- Thermal: deflection temperatures under load (T1.8 and T8.0) and flammability (glow-bar test).
- Electrical: dissipation factor (tan δ), volume and surface resistivity, proof tracking index (PTI).
- Other: water absorption (W24) and optional information (e.g., cure time, particle size, moisture content) when agreed between parties.
- Test and compliance rules
- Property values are reported as mean values from test specimens and compared to the tables (Tables 1–3) in the standard.
- Individual results for certain mechanical properties must lie within defined tolerances of the mean (e.g., properties 2.1–2.4 within ±10%; deflection temperatures within ±5 °C).
- Rheological and processing properties are not explicitly limited by ISO 15252-3 - these must be agreed between interested parties to ensure processability for compression or injection moulding.
- Filler types
- Tables cover EP-PMCs with different filler mixes (e.g., combinations referenced as MD, GF, GG); specific designation meanings are given in ISO 15252-1.
Applications and practical value
- Use ISO 15252-3 to:
- Specify material acceptance criteria for epoxy powder moulding compounds in product specifications and supplier contracts.
- Guide quality control laboratories in selecting appropriate tests and acceptance limits for EP-PMC batches.
- Support material selection for components requiring defined mechanical, thermal and electrical performance (e.g., electronic housings, insulating parts, structural mouldings).
- The standard helps ensure consistent performance between compression-moulded and injection-moulded parts when the designation and test methods are followed.
Who uses this standard
- EP-PMC manufacturers and formulators
- Moulders (compression and injection)
- Materials engineers, design engineers and component specifiers
- Test laboratories and quality assurance teams
- Procurement and regulatory compliance personnel
Related standards
- ISO 15252-1:1999 - Designation system and basis for specifications
- ISO 15252-2:1999 - Preparation of test specimens and determination of properties
- ISO 472:1999 - Plastics vocabulary
Keywords: ISO 15252-3, epoxy powder moulding compounds, EP-PMCs, requirements, test methods, compression moulding, injection moulding, mechanical properties, thermal properties, electrical properties, material specification.